Because this summary is often behind schedule updates to the current date are being added here to make it more relavent to current conditions
April 23, 2025
The strongest earthquake in the world today was an M 6.2 (EMSC) to M 6.6 (BMG) event in North Sulawesi,
Indonesia. NEIC reported it was felt with intensity III in Southern Mindanao, Philippines at Sugal, Katangawan, Davao, Buayan, Bato, Polonuling and in Manado Sulawesi, Indonesia. PHIVOLCS reported intensity IV in City of Mati, Davao Oriental and III in Jose Abad Santos, Malungon, Sarangani; City of General Santos, Pantukan, Davao de Oro with lesser shaking in Davao Occidental and Oriental, South Cotabato, Sultan Kudarat and Davao de Oro. It was at a shallow focus and caused buildings to sway, alarms to go off
and minor damage throughout the epicentral area according to news sources. Many people
fled their homes with minor injuries common. No tsunami was expected nor
observed with this earthquake. The last earthquake of M>=6.2 within about 150
km of today's epicenter occurred on January 8, 2024 with M 6.7. At the time this summary noted:
"The strongest earthquake in the world today was an M 6.7-6.8 in the Talaud Islands. NEIC reported it was felt with intensity up to VI in Sarangani, Philippines.
PHIVOLCS reported it was felt with intensity IV in Sarangani, Davao Occidental; Glan, Kiamba and Malungon, Sarangani and III in Nabunturan and Pantukan, Davao de Oro, City of Digos, Davao Del Sur; City of Davao, Don Marcelino an dJHose Abad Santos, Davao Occidental; Matalam, Cotabato, Alabel and Malapatan, Sarangani; City of Koronadal, Polomolok, T'Boli, and Tupi, South Cotabato and City of General Santos and with lesser intensity in Zamboanga, Sultan Kudarat.
BMG reported this event with M 7.0 was felt with intensity IV in Sangihe, Tabukan, Marore, and in Talaud at Lirung, Beo, Rainis, Essang, Nanusa, Kabaruan, Melonguane, Gemeh, Damau, Salibabu, Kalongan, Miangas, Pulutan, Moronge, and III in Sangihe at Manganitu, Tatoareng, Tamako, Manganitu, Tabukan Tengah, Kendahe, Tahuna, Siau, Tagulandang, Biaro.
Aftershocks of M 5.3 and M 5.1 were also felt with light to moderate intensity in the Talaud area
according to data from BMG. This epicenter is near the 11th node from the M 7.5 in Honshu,
Japan of January 1, 2024 (32.7 degrees) and may have been promoted by
energy from that source as well as from other strong earthquakes in the area
of Mindanao over the past two months.
Today's earthquake is the strongest within about 200 km of this epicenter
since an M 7.0 on January 21, 2021. At the time this summary noted:
"Today's event (in Mindanao) is the strongest within about 200 km of this epicenter since an
M 7.0 on December 29, 2018. The last of larger magnitude was an M 7.2 about 200
km southwest of this on February 11, 2009. ...
The coast of California is near 103 degrees from the epicenter of this earthquake in the Philippines and
may see enhanced seismicity related to incoming energy from this source
in the near future." (January 21, 2021, January 8, 2024)
This event occurred as the strongest solar
flare of the day (SWPC #8050) was reaching its peak. Following is the flare data
for this event from SWPC:
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
8050 1000* 1049 1134 M1.3 (April 22, 2025) 6.3E-02
Talaud M 6.2-6.6 10:17 UT
South of Java M 5.7 10:14 UT
Seram M 4.9 10:15 UT
Honshu M 3.9 11:38 UT
Forecast 171341 had expected today's event in Talaud was likely within about 100
km of this epicenter around April 18.
O: 22APR2025 10:17:13 4.5N 127.8E ML=6.2 NEIC Sulawesi, Indonesia
O: 22APR2025 10:17:13 4.3N 127.5E ML=6.6 BMG Sulawesi, Indonesia
P: 18APR2025 171341 4.0N 129.0W 4.0-5.4 BAAAA Halmahera
The M 6.2-6.6 in Talaud/Sulawesi was accompanied by an M 5.7 south of Java, Indonesia several minutes earlier as well as an M 4.9 in Ceram, Indonesia.
NEIC reported this event was felt with intensity III in Java at Karawang and in Serpong, Banten and II in Bandung, Depok, Sukabumi and lightly in Jakarta and Cikeruh, Indonesia.
Forecast 171362 had expected this earthquake in Java was likely within
about 100 km around April 20, 2025.
O: 22APR2025 10:14:02 8.3S 106.7E ML=5.7 NEIC South of Java, Indonesia
O: 22APR2025 10:14:02 8.3S 106.7E ML=5.7 BMG Sulawesi, Indonesia
P: 20APR2025 171362 7.0S 107.0E 4.0-5.4 ABAAA South of Java
The events in M 5.7, 6.2-6.6 and M 4.9 occurred within about three minutes
and were apparently triggered by SFE associated with the strongest
solar flare of the day (#8050 - see above).
This appears to break the 5-day global seismicity quiet which began shortly
at a major geomagnetic storm hit on April 16. The likely seismic effects of this storm
were reviewed in this summary in the previous two issues as:
"A severe geomagnetic storm began today about 16:00 UT (April 16). It reached
maximum Planetary Kp of 8 around 22:00-23:00 UT. The last geomagnetic storm
of greater disturbance occurred on January 1, 2025 with A-index (planetary)
of 86. Today's AP index reached 77. A major earthquake of M 7.1 followed the January 1, 2025 storm
on January 7, 2025 in the area of Xizang, China. Severe storms of this
type can trigger enhanced seismicity at the time of commencement (see previous
issue of this summary) or after ring currents re-develop up to a week after
the initiation of the storm. Strong earthquakes followed the January 1, 2025
storm in the next seven days in the South Sandwich Islands (M 6.1); Iquique, Chile (M 6.1)
Ethiopia (M 5.7); Guatemala M 6.2 and M 5.8 and Xizang M 7.1. A similar set
may occur following today's storm especially around April 20-24, 2025." (April 17, 2025)
The current storm has been long-lived perhaps delaying the onset of strong
global seismicity to this point, but ring currents in the ionosphere are
reforming and resulting telluric currents beneath these should begin to
trigger moderately large to large earthquakes in the next day or two. These
are most likely about 10 degrees from the geomagnetic equator but can occur
at high latitude as well." (April 20, 21, 2025)
The most likely areas to see enhanced seismicity following this flare
are located at local solar noon or local solar midnight and include areas
near 30 degrees East longitude and 150 degrees West longitude. The most
active seismic zones at these longitude are in Southern Alaska and
in Western Turkey and Greece.
A series of light earthquakes in Western Turkey near 28-29E longitude occurred after the flare
and may have been promoted by SFE from it. More such activity may
occur in the next day. The largest of today's events in western Turkey
occurred at 40N 28E near Istanbul with M 3.5. EMSC reported it was felt lightly in Turkey at Levent, Kayacik, Haci Yusuf. 600 Evler and Tatlisu.
This epicenter is at the sixth node (60 degrees) from the M 7.1 in Myanmar of March 28
and may have been promoted by energy from that source. The area near Istanbul
is considered a likely location for a strong, damaging earthquake in the
near future by many geophysicists, as noted in previous issues of this summary.
An unusually large M 4.5 also occurred at 150W longitude in the area of
Anchorage, Alaska. NEIC reported it was felt with intensity III in Alaska at Fort Richardson and Nikolai; III in Matanuska-Susitna Borough, Anchorage, Elmendorf AFB, Chugiak, Eagle River, Girdwood, Kenai, Nikolski, Palmer, Wasilla, Seward, Talkeetna, Willow and II in Manokotak, Soldotna and Sterling.
The last event with abouot 200 km of today's epicenter with M>=4.5 was an M 4.5 on October 11, 2024
but the last of significantly larger magnitude was an M 5.0 on December 1, 2023. At
the time this summary noted:
"Two events of M 5.0 occurred in Alaska - an M 5.0 in the Andreanof Islands and
an M 5.0 in Central Alaska. NEIC reported this event was felt with intensity up to V in Petersville, Alaska.
EMSC reported it was felt with moderate intensity in Central Alaska at Wasilla,
Palmer, Knik-Fairview, Eagle River, Anchorage, This event occurred within minutes
of the height of the arrival of the CME around 06:00 UT (see above) and was
probably triggered by that ionospheric disturbance.
The last earthquake within about 150 km of this epicenter with M>=5 in Central
Alaska occurred as an M 5.0 on October 4, 2019. Larger earthquakes hit about 200 km from today's epicenter
on February 6, 2022 and May 31, 2021. At the time of the M 5.0 on October 4, 2019 this summary
noted:
"Today's event was reported by NEIC to have been felt with maximum intensity V in the Matanuska-Sustina border of Alaska and II-III within about 200 km of the epicenter at Talkeetna, Willow, Wasilla, Chugiak, Elmendorf AFB, Anchorage.
This event of M 5.0 is the strongest within about 150 km of this epicenter in Central
Alaska since an M 5.0 on July 10, 2018 - the last of larger magntiude was an M 5.2 on January 31, 2017.
Today's event is about 150 km northwest of the M 7.1 quake that shook Alaska
on November 30, 2018 and may be a regional aftershock of that event." (October 4, 2019, December 1, 2023)
Today's event in Alaska was probably triggered by the solar flare
which occurred when this epicenter was within minutes of local solar midnight -
a time when SFE maximizes following solar flares.
O: 23APR2025 00:24:51 61.8N 150.1W ML=4.5 NEIC Central Alaska
P: 19APR2025 171555 60.2N 151.7W 3.2-5.0 BBAAA Central Alaska
An M 5.1 was widely felt in eastern Australia near Sydney today. NEIC reported maximum intensity V
in New South Wales at Singleton, IV in Armidale, Cessnock, Kurri Kurri, Wollongong, Camden, Forster-Tuncurry, Katoomba-Wentworth Falls, III in Lemon Tree Passage, Medowie, Nelson Bay, Raymond Terrace, Sydney, and as far as Tasmania.
TC Alfred passed north of this epicenter several months ago and did much
damage and may have helped promote today's event.
O: 22APR2025 16:55:03 32.7S 150.8E ML=5.1 NEIC New South Wales, Australia
The earthquake in New South Wales, Australia was one of three significant
earthquakes during the six minutes between 16:50 UT and 16:56 UT today.
The other events at this time were an M 5.7 in Vanuatu and an M 4.3 in Saudi Arabia.
The event in Jubail was reported felt with intensity II in Jubail, Saudi Arabia.
The trigger for these events is not currently obvious.
An earthquake of M 5.7 was also recorded in Papua New Guinea today. NEIC reported it
was felt with intensity III in New Guinea at Goroka, Kainantu and Madang with II in Wau, Morobe.
An earthquake of M 3.1 occurred in eastern Ohio today. NEIC reported it was felt with intensity IV in Ohio at Cumberland, Pleasant City and Sarahsville with III in Byesville, Caldwell, Senecaville, New Paris, Dayton and II in Newark, South Zanesville, Mason.
This is the strongest earthquake in Ohio within about 100 km of today's
epicenter since an M 3.4 on June 3, 2017. At the time this summary noted:
"An unusual earthquake of M 3.5 was widely felt in Ohio, U.S. today. NEIC reported
the event was felt with maximum intensity IV in Ohio at Lewisville, Quaker City, Byesville, and II-III in Senecaville, Salesville, Barnesville, Sarahsville, Caldwell, Cambridge, Cumberland, Norwich, Beverly, Lowell, Marietta, Little Hocking and Warren and in Evans City, Pennyslvania and Louisville, Kentucky and in general within about 50 km of the epicenter.
This is the second earthquake to be felt in Ohio in the past week, An M 3.4 occurred
about 150 km southwest of this on May 24. The last earthquake in Ohio within about
150 km of this epicenter occurred on November 20, 2013 with M 3.5. The only
such earthquake in Ohio in the past 25 years of larger magnitude was an M 3.6
on February 19, 1995 about 250 km southwest of today's epicenter." (June 3, 2017)
Forecast 171513 had expected this activity in Ohio in mid-April.
O: 22APR2025 08:12:50 39.9N 81.5W ML=3.1 NEIC Ohio
P: 17APR2025 171513 40.0N 84.0W 2.0-3.9 CABAA Ohio/Lake Erie
P: 14APR2025 171513 41.8N 81.4W 2.0-3.9 CBAAA Ohio/Lake Erie
NEIC reported an earthquake of M 2.6 in Southern Missouri was felt with intensity up to II-III in the area(s) of Southern Missouri in Mansfield with intensity III and II in Saint Robert and Hartville and Jefferson City. Also reported felt lightly in Cordova, Tennessee.
NEIC reported an earthquake of M 3.9 in Gujarat, India was felt with intensity up to II-III in the area(s) of Gujarat, India with IV at Anjar; III in Bhuj and II in Mundra.
EMSC reported it with M 4.3 was felt with moderate intensity in India at Anand Colong, Vijay Nagar, Bhuj, Gandhidham, Mundra.
NEIC reported an earthquake of M 2.7 in Southern California was felt with intensity up to II-III in the area(s) of Southern California in Calipatria with IV and in Palm Desert and San Diego with lesser shaking.
EMSC reported an earthquake of M 3.9 in Tunisia was felt with intensity up to IV in the area(s) of Tunisia at Sidi Bouzid, Zarzouna.
TROPICAL CYCLONE 31P
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 31P 2025-04-22 00:00 UT 10.9S 135.4E 040 kts South of New Guinea/ North of Australia
Tropical Cyclone 31P continued today in the area north of Australia with winds up to 40 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 11N 45W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7990 0054 0100 0107 C9.9 (April 22, 2025) 5.3E-03
8050 1000* 1049 1134 M1.3 (April 22, 2025) 6.3E-02
Talaud M 6.2-6.6 10:17 UT
South of Java M 5.7 10:14 UT
Seram M 4.9 10:15 UT
Honshu M 3.9 11:38 UT
8110 1851 1857 1900 C2.6 (April 22, 2025) 1.4E-03
Banda Sea M 4.4 19:10 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: minor storms April 23 active April 24-25. Solar M-flare chance: 40% X-class: 1% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 13 14 13 08:00 4 142 163
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC 31P (ADIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 23 09 06 2025 -21.9 -68.6 4.7 NNE OF CALAMA CHILE M165 T95 R80 Z95 B131 A142
04 23 08 26 2025 37.5 -118.8 2.2 TOMS PLACE CA M112 T77 R59 Z107 B93 A111
04 23 08 23 2025 31.0 -103.7 2.0 NE OF BALMORHEA TEXAS M124 T84 R55 Z112 B105 A124
04 23 04 45 2025 31.7 -104.3 2.4 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A123
04 23 04 31 2025 37.3 -92.5 2.6 E OF HARTVILLE MISSOURI M120 T95 R44 Z123 B114 A131
04 23 04 27 2025 5.5 94.7 4.7 BANDA ACEH INDONESIA M16 T93 R106 Z81 B58 A40
04 23 03 58 2025 65.7 -151.6 3.3 CENTRAL ALASKA M78 T87 R53 Z116 B82 A93
04 23 03 24 2025 -1.9 133.1 4.2 WNW OF BINTUNI INDONESIA M43 T54 R127 Z53 B18 A8
04 23 03 21 2025 31.1 -103.2 2.2 SW OF COYANOSA TEXAS M124 T84 R54 Z112 B105 A124
04 23 02 25 2025 36.6 142.4 4.4 ESE OF IWAKI JAPAN M42 T70 R90 Z85 B43 A47
04 23 02 19 2025 36.6 -121.2 2.2 NW OF PINNACLES CA M112 T75 R61 Z105 B91 A109
04 23 00 28 2025 -17.3 -175.0 4.6 NW OF NEIAFU TONGA M95 T3 R134 Z33 B34 A51
04 23 00 24 2025 61.8 -150.1 4.5 CENTRAL ALASKA M81 T83 R55 Z113 B80 A93
04 23 00 09 2025 36.4 -83.8 2.3 N OF MAYNARDVILLE TENNESSEE M121 T101 R39 Z128 B121 A138
04 23 00 09 2025 18.1 -68.4 3.8 DE YUMA DOMINICAN REPUBLIC M137 T110 R44 Z127 B139 A158
04 22 22 55 2025 51.8 -171.6 3.5 ANDREANOF IS. ALASKA M74 T71 R70 Z99 B65 A78
04 22 20 37 2025 -20.6 -173.5 5.1 SE OF PANGAI TONGA M98 T0 R136 Z30 B36 A53
04 22 19 10 2025 -7.4 128.9 4.4 LOSPALOS TIMOR LESTE M43 T56 R132 Z50 B22 A4
04 22 18 44 2025 18.8 -64.6 3.2 BAY U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142 A161
04 22 18 13 2025 48.6 -121.3 2.1 ENE OF MARBLEMOUNT WASHINGTON M102 T83 R53 Z113 B92 A108
04 22 17 56 2025 23.9 69.8 3.9 NNE OF BHUJ INDIA M24 T121 R78 Z111 B85 A69
04 22 17 22 2025 35.0 -85.0 2.4 NW OF COHUTTA GEORGIA M123 T100 R40 Z126 B120 A138
04 22 17 01 2025 44.7 -117.0 2.4 E OF RICHLAND OREGON M107 T82 R53 Z113 B95 A111
04 22 16 55 2025 -32.7 150.9 5.1 SW OF SINGLETON AUSTRALIA M75 T33 R159 Z18 B26 A28
04 22 16 55 2025 -13.1 167.1 5.7 NNW OF SOLA VANUATU M78 T19 R137 Z33 B16 A34
04 22 16 50 2025 27.3 50.0 4.3 AL JUBAYL SAUDI ARABIA M41 T139 R64 Z126 B103 A87
04 22 14 49 2025 -20.2 -173.2 4.9 ESE OF FANGALE’OUNGA TONGA M98 T0 R135 Z31 B36 A53
04 22 14 49 2025 41.9 -112.6 2.4 ESE OF SNOWVILLE UTAH M111 T83 R52 Z113 B98 A115
04 22 13 54 2025 33.2 -115.6 2.0 SW OF NILAND CA M117 T76 R60 Z106 B95 A114
04 22 13 29 2025 -5.5 147.0 5.7 LAE PAPUA NEW GUINEA M56 T40 R132 Z44 B4 A15
04 22 12 04 2025 -30.5 -72.2 4.4 W OF OVALLE CHILE M166 T89 R89 Z86 B124 A133
04 22 12 02 2025 32.0 -103.3 2.0 JAL NEW MEXICO M123 T85 R54 Z112 B105 A124
04 22 10 17 2025 4.5 127.8 6.2 SE OF PONDAGUITAN PHILIPPINES M35 T62 R120 Z61 B26 A14
04 22 10 15 2025 -3.5 131.0 4.9 WSW OF FAKFAK INDONESIA M42 T56 R128 Z52 B20 A6
04 22 10 14 2025 -8.3 106.8 5.7 SSW OF BANJAR INDONESIA M31 T77 R124 Z63 B44 A24
04 22 09 05 2025 33.2 -115.6 2.7 SW OF NILAND CA M117 T76 R60 Z106 B95 A114
04 22 09 05 2025 33.2 -115.6 2.3 SW OF NILAND CA M117 T76 R60 Z106 B95 A114
04 22 08 47 2025 35.8 -119.8 2.5 KETTLEMAN CITY CA M113 T75 R61 Z105 B92 A110
04 22 08 12 2025 39.9 -81.5 3.1 PLEASANT CITY OHIO M118 T104 R35 Z131 B121 A137
04 22 07 14 2025 -3.5 131.1 4.5 WSW OF FAKFAK INDONESIA M42 T56 R129 Z52 B20 A6
04 22 06 53 2025 31.6 -104.5 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104 A123
04 22 05 54 2025 -27.5 -69.3 4.5 E OF COPIAPó CHILE M165 T92 R86 Z90 B128 A137
04 22 05 52 2025 18.8 -64.8 3.9 BAY U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142 A161
04 22 05 04 2025 39.0 70.7 4.3 E OF RASHT TAJIKISTAN M27 T121 R66 Z120 B86 A74
04 22 04 30 2025 39.4 144.7 4.4 E OF YAMADA JAPAN M44 T70 R88 Z87 B45 A50
04 22 04 09 2025 4.3 124.8 4.2 SSW OF SARANGANI PHILIPPINES M33 T64 R119 Z62 B28 A15
04 22 02 55 2025 40.3 -124.9 3.0 WNW OF PETROLIA CA M107 T75 R60 Z106 B88 A106
04 22 02 00 2025 48.4 153.1 4.0 KURIL ISLANDS" M52 T74 R79 Z95 B54 A61
04 22 01 30 2025 45.5 82.4 4.2 N OF DRUZHBA KAZAKHSTAN M25 T113 R67 Z117 B80 A70
April 22, 2025
It has now been five days since a major geomagnetic storm began. During this time
the global seismicity has been at quiet levels as expected at the time in
this summary:
"A severe geomagnetic storm began today about 16:00 UT (April 16). It reached
maximum Planetary Kp of 8 around 22:00-23:00 UT. The last geomagnetic storm
of greater disturbance occurred on January 1, 2025 with A-index (planetary)
of 86. Today's AP index reached 77. A major earthquake of M 7.1 followed the January 1, 2025 storm
on January 7, 2025 in the area of Xizang, China. Severe storms of this
type can trigger enhanced seismicity at the time of commencement (see previous
issue of this summary) or after ring currents re-develop up to a week after
the initiation of the storm. Strong earthquakes followed the January 1, 2025
storm in the next seven days in the South Sandwich Islands (M 6.1); Iquique, Chile (M 6.1)
Ethiopia (M 5.7); Guatemala M 6.2 and M 5.8 and Xizang M 7.1. A similar set
may occur following today's storm especially around April 20-24, 2025." (April 17, 2025)
The current storm has been long-lived perhaps delaying the onset of strong
global seismicity to this point, but ring currents in the ionosphere are
reforming and resulting telluric currents beneath these should begin to
trigger moderately large to large earthquakes in the next day or two. These
are most likely about 10 degrees from the geomagnetic equator but can occur
at high latitude as well.
While this newly enhanced seismicity is awaited global seismicity remained
at low to quiet levels with no significant earthquakes recorded.
The strongest solar flare of the day was an M1.9 class event (SWPC # 7950).
An earthquake in Hokkaido, Japan of M 4.1 occurred at the start of this
strong flare and may have been promoted by SFE associated with it.
Data on this flare from SWPC follow:
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7950 1824 1837 1841 M1.9 (April 21, 2025) 8.5E-03
Hokkaido, Japan M 4.1 18:24 UT
NEIC reported an earthquake of M 3.0 off the coast of northern California was felt with intensity up to II-III in the area(s) of northern California at Eureka.
NEIC reported an earthquake of M 4.5 in Luzon, Philippines was felt with intensity up to II-III in the area(s) of Luzon, Philippines with IV in Davila, Ilocos.
NEIC reported an earthquake of M 3.4 in the Alaska Peninsula was felt with intensity up to II-III in the area(s) of the Alaska Peninsula at King Cove.
NEIC reported an earthquake of M 4.5 in Honshu, Japan was felt with intensity up to II-III in the area(s) of Honshu, Japan with III in Chiba and Tokyo and II in Kanagawa Prefectures.
EMSC reported weak shaking in Chiba Prefecture.
EMSC reported an earthquake of M 4.0 in Mindanao, Philippines was felt with intensity up to IV in the area(s) of Mindanao, Philippines at Cebu City with a sudden jolt.
EMSC reported an earthquake of M 4.3 in Western Turkey was felt with intensity up to IV in the area(s) of Western Turkey at Cumhuriyet,Abaci, Bahcelievler, Gundogan, Yunus Emre, Akincilar, Derecik, Sakarya, Esnevler, Evka.
CSN reported the following parameters for an M 4.6 in Atacama today:
22-04-2025 05:54 27.55 69.44 114 4.6 III Atacama at Copiapo and Tierra Amarilla, Chile.
TROPICAL CYCLONE 31P
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 31P 2025-04-22 00:00 UT 10.3S 134.0E 045 kts South of New Guinea/ North of Australia
Tropical Cyclone 31P continued today in the area north of Australia with winds up to 45 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 11N 45W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7810 0010 0031 0054 C3.9 (April 21, 2025) 8.3E-03
Chiapas M 4.2 00:20 UT
7870 0631 0642 0651 C2.1 (April 21, 2025) 2.5E-03
Halmahera M 4.4 07:17 UT
Argentina M 4.0 06:57 UT
7950 1824 1837 1841 M1.9 (April 21, 2025) 8.5E-03
Hokkaido, Japan M 4.1 18:24 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: major storms April 22 minor storms April 23 active April 24. Solar M-flare chance: 40% X-class: 1% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 35 37 24 13:00 5 137 163
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC 31P (ADIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 22 09 05 2025 33.2 -115.6 2.7 SW OF NILAND CA M117 T76 R60 Z106 B95 A112
04 22 08 47 2025 35.8 -119.8 2.5 KETTLEMAN CITY CA M113 T75 R61 Z105 B92 A108
04 22 08 12 2025 39.9 -81.5 3.1 PLEASANT CITY OHIO M118 T104 R35 Z131 B121 A136
04 22 06 53 2025 31.6 -104.5 2.4 VAN HORN TEXAS M123 T84 R55 Z111 B104 A121
04 22 05 54 2025 -27.5 -69.3 4.5 E OF COPIAPó CHILE M165 T92 R86 Z90 B128 A136
04 22 05 52 2025 18.8 -64.8 3.9 BAY U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142 A159
04 22 05 04 2025 39.0 70.7 4.3 E OF RASHT TAJIKISTAN M27 T121 R66 Z120 B86 A76
04 22 02 55 2025 40.3 -124.9 3.0 WNW OF PETROLIA CA M107 T75 R60 Z106 B88 A104
04 21 22 52 2025 46.2 149.6 4.3 NE OF KURIL’SK RUSSIA M49 T73 R81 Z93 B51 A57
04 21 22 23 2025 -5.4 -76.2 4.8 NNW OF YURIMAGUAS PERU M161 T95 R68 Z104 B130 A146
04 21 22 07 2025 38.3 -96.9 2.6 ESE OF MARION KANSAS M118 T92 R46 Z120 B110 A126
04 21 21 28 2025 0.4 125.0 4.7 E OF MODISI INDONESIA M35 T63 R123 Z59 B27 A13
04 21 21 19 2025 32.1 -102.2 2.5 NW OF MIDLAND TEXAS M123 T86 R53 Z113 B106 A123
04 21 21 13 2025 49.3 -120.5 2.1 S OF PRINCETON CANADA M101 T83 R52 Z114 B93 A107
04 21 18 23 2025 41.8 143.4 4.1 SSE OF HIROO JAPAN M44 T73 R85 Z90 B48 A52
04 21 17 46 2025 18.4 120.8 4.5 SSE OF BANGUI PHILIPPINES M23 T74 R105 Z76 B38 A31
04 21 17 24 2025 39.3 29.0 4.0 N OF SIMAV TURKEY M58 T152 R43 Z148 B118 A107
04 21 16 48 2025 37.4 141.6 4.5 ENE OF TOMIOKA JAPAN M42 T71 R90 Z86 B44 A47
04 21 16 14 2025 26.5 140.5 4.0 BONIN ISLANDS JAPAN REGION" M40 T64 R100 Z76 B34 A36
04 21 15 46 2025 -56.1 -28.0 5.1 SOUTH SANDWICH ISLANDS REGION" M126 T98 R108 Z76 B118 A112
04 21 15 31 2025 55.1 -162.1 3.4 KING COVE ALASKA M78 T75 R64 Z104 B71 A83
04 21 13 11 2025 36.0 139.8 4.5 N OF KASUKABE JAPAN M40 T71 R91 Z85 B43 A46
04 21 10 42 2025 30.2 52.0 4.4 E OF NÅ«RÄBÄD IRAN M40 T137 R63 Z127 B101 A88
04 21 09 28 2025 -18.2 -178.1 4.4 E OF LEVUKA FIJI M93 T4 R136 Z31 B31 A47
04 21 08 26 2025 8.9 126.6 4.4 E OF ARAS-ASAN PHILIPPINES M32 T65 R115 Z65 B29 A20
04 21 08 22 2025 -31.9 -68.3 4.3 NUEVE DE JULIO ARGENTINA M162 T91 R89 Z87 B126 A133
04 21 07 53 2025 -1.2 -15.9 5.2 NORTH OF ASCENSION ISLAND" M110 T149 R55 Z132 B165 A148
04 21 07 32 2025 39.1 -119.0 2.9 KM ENE OF YERINGTON M111 T78 R58 Z108 B93 A109
04 21 07 20 2025 37.4 -117.2 2.3 KM S OF GOLDFIELD M113 T78 R58 Z108 B94 A110
04 21 07 17 2025 0.4 127.1 4.4 SW OF TERNATE INDONESIA M37 T61 R124 Z57 B25 A12
04 21 06 17 2025 38.2 69.1 4.3 SSE OF YOVON TAJIKISTAN M28 T123 R66 Z120 B87 A77
04 21 05 56 2025 6.8 126.6 4.5 SE OF LUKATAN PHILIPPINES M33 T64 R117 Z63 B28 A18
04 21 02 03 2025 18.7 -67.1 3.1 SAN ANTONIO PUERTO RICO M136 T111 R43 Z128 B140 A157
04 21 01 59 2025 33.2 -115.6 2.2 NW OF CALIPATRIA CA M117 T76 R60 Z106 B95 A112
04 21 01 07 2025 32.6 93.4 4.7 NE OF NAGQU CHINA M10 T102 R82 Z102 B67 A57
04 21 00 03 2025 29.2 87.0 4.2 N OF LOBUCHE NEPAL M10 T107 R82 Z103 B71 A59
April 21, 2025
It has now been four days since a major geomagnetic storm began. During this time
the global seismicity has been at quiet levels as expected at the time in
this summary:
"A severe geomagnetic storm began today about 16:00 UT (April 16). It reached
maximum Planetary Kp of 8 around 22:00-23:00 UT. The last geomagnetic storm
of greater disturbance occurred on January 1, 2025 with A-index (planetary)
of 86. Today's AP index reached 77. A major earthquake of M 7.1 followed the January 1, 2025 storm
on January 7, 2025 in the area of Xizang, China. Severe storms of this
type can trigger enhanced seismicity at the time of commencement (see previous
issue of this summary) or after ring currents re-develop up to a week after
the initiation of the storm. Strong earthquakes followed the January 1, 2025
storm in the next seven days in the South Sandwich Islands (M 6.1); Iquique, Chile (M 6.1)
Ethiopia (M 5.7); Guatemala M 6.2 and M 5.8 and Xizang M 7.1. A similar set
may occur following today's storm especially around April 20-24, 2025." (April 17, 2025)
The current storm has been long-lived perhaps delaying the onset of strong
global seismicity to this point, but ring currents in the ionosphere are
reforming and resulting telluric currents beneath these should begin to
trigger moderately large to large earthquakes in the next day or two. These
are most likely about 10 degrees from the geomagnetic equator but can occur
at high latitude as well.
While this newly enhanced seismicity is awaited global seismicity remained
at low to quiet levels with no significant earthquakes recorded.
The largest earthquake reported in the world today was an M 5.4 in the Ceram Sea area of Indonesia. NEIC reported it may have been felt with intensity up to V in the epicentral area.
The strongest earthquake in the U.S. or Canada today was an M 3.8 in the Near Islands, Aleutians, Alaska. It was not reported felt in this remote area.
An M 4.1 also occurred in the Fox Islands, Alaska but was not reported felt.
NEIC reported an earthquake of M 2.9 in Wyoming was felt with intensity up to II-III in the area(s) of Wyoming at Jackson.
NEIC reported an earthquake of M 4.9 in Vanuatu was felt with intensity up to II-III in the area(s) of Vanuatu with IV in Vila Shefa.
NEIC reported an earthquake of M 4.6 in northern Vanuatu was felt with intensity up to II-III in the area(s) of northern Vanuatu with III in Vila Shefa.
NEIC reported an earthquake of M 4.4 in the Dodecanese Islands, Greece was felt with intensity up to II-III in the area(s) of the Dodecanese Islands in Kiklades at Kamarion, Mesaria, Naousa, Greece.
NEIC reported an earthquake of M 3.2 in northeastern Washington State was felt with intensity up to II-III in the area(s) of northeastern Washington State with IV in Tonasket; III in Loomis, Oroville and Seattle and in Walnut Grove, British Columbia, Canada.
TROPICAL CYCLONE 31P
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 31P 2025-04-21 00:00 UT 10.9S 135.4E 040 kts South of New Guinea/ North of Australia
Tropical Cyclone 31P continued today in the area north of Australia with winds up to 40 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 11N 45W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7720 0620 0623 0626 C2.0 (April 20, 2025) 6.8E-04
Crete M 3.8 06:22 UT
Tarapaca M 4.2 06:35 UT
7730 0750 0757 0806 C2.2 (April 20, 2025) 2.0E-03
7740 1137 1211 1259 M1.0 (April 20, 2025) 6.1E-04
7790 1623 1628 1633 C1.7 (April 20, 2025) 8.3E-04
7800 1702 1718 1734 C4.3 (April 20, 2025) 6.4E-03
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: disturbed April 21 major storms April 22 minor storms April 23. Solar M-flare chance: 40% X-class: 1% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 14 13 11 11:00 4 108 156
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC 31P (ADIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 21 07 53 2025 -1.2 -15.9 5.2 NORTH OF ASCENSION ISLAND" M110 T149 R55 Z132 B165 A148
04 21 07 32 2025 39.1 -119.0 2.9 KM ENE OF YERINGTON M111 T78 R58 Z108 B93 A109
04 21 07 20 2025 37.4 -117.2 2.3 KM S OF GOLDFIELD M113 T78 R58 Z108 B94 A110
04 21 05 56 2025 6.8 126.6 4.5 SE OF LUKATAN PHILIPPINES M33 T64 R117 Z63 B28 A18
04 21 02 03 2025 18.7 -67.1 3.1 SAN ANTONIO PUERTO RICO M136 T111 R43 Z128 B140 A157
04 21 01 59 2025 33.2 -115.6 2.2 NW OF CALIPATRIA CA M117 T76 R60 Z106 B95 A112
04 21 01 07 2025 32.6 93.4 4.7 NE OF NAGQU CHINA M10 T102 R82 Z102 B67 A57
04 21 00 03 2025 29.2 87.0 4.2 N OF LOBUCHE NEPAL M10 T107 R82 Z103 B71 A59
04 20 23 28 2025 51.2 -178.6 3.9 WSW OF ADAK ALASKA M70 T71 R72 Z98 B62 A73
04 20 23 09 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A122
04 20 22 40 2025 43.5 -110.5 2.2 SSE OF KELLY WYOMING M110 T86 R50 Z116 B99 A115
04 20 22 39 2025 18.9 -66.9 3.0 ISABELA PUERTO RICO M136 T111 R43 Z128 B140 A157
04 20 22 22 2025 34.0 -118.8 2.1 SE OF MALIBU CA M115 T75 R61 Z104 B92 A109
04 20 21 55 2025 40.3 -124.7 3.0 WNW OF PETROLIA CA M107 T75 R60 Z106 B88 A104
04 20 21 51 2025 1.3 126.5 4.3 WNW OF TERNATE INDONESIA M36 T62 R123 Z59 B26 A13
04 20 21 25 2025 18.9 -64.2 3.4 BAY U.S. VIRGIN ISLANDS M134 T114 R41 Z130 B142 A160
04 20 21 14 2025 43.5 -110.6 2.9 E OF JACKSON WYOMING M110 T85 R50 Z116 B99 A115
04 20 21 06 2025 34.0 -117.1 2.0 S OF MENTONE CA M116 T76 R60 Z105 B94 A111
04 20 20 59 2025 -25.3 55.8 4.8 SOUTH INDIAN OCEAN" M61 T113 R108 Z84 B92 A75
04 20 20 34 2025 38.9 70.8 4.1 ESE OF RASHT TAJIKISTAN M27 T121 R67 Z120 B86 A76
04 20 20 33 2025 12.9 143.3 4.8 MERIZO VILLAGE GUAM M45 T53 R114 Z62 B20 A24
04 20 20 20 2025 39.0 70.7 4.3 E OF RASHT TAJIKISTAN M27 T121 R66 Z120 B86 A76
04 20 20 16 2025 32.1 -101.7 2.2 ESE OF STANTON TEXAS M123 T86 R53 Z114 B107 A124
04 20 18 19 2025 -3.4 131.0 5.4 WSW OF FAKFAK INDONESIA M42 T56 R128 Z52 B20 A7
04 20 17 45 2025 -17.6 168.0 4.9 WNW OF PORT-VILA VANUATU M80 T17 R141 Z29 B19 A33
04 20 17 42 2025 37.4 -117.2 2.0 KM S OF GOLDFIELD M113 T78 R58 Z108 B94 A110
04 20 16 29 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A122
04 20 16 18 2025 31.7 -104.3 3.1 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A122
04 20 15 15 2025 -13.7 166.9 4.6 WNW OF SOLA VANUATU M78 T19 R138 Z32 B16 A32
04 20 13 03 2025 -19.3 -177.0 4.4 NW OF HOUMA TONGA M94 T3 R136 Z30 B33 A48
04 20 11 49 2025 54.3 -158.8 3.1 155 KM SE OF M80 T75 R64 Z104 B72 A85
04 20 11 22 2025 71.1 -136.9 3.1 NORTHERN ALASKA M80 T94 R45 Z124 B89 A99
04 20 11 21 2025 -8.0 116.9 4.2 LABUAN LOMBOK INDONESIA M36 T67 R128 Z56 B34 A17
04 20 10 26 2025 50.9 175.1 3.8 NEAR ISLAND ALASKA M66 T71 R74 Z97 B60 A70
04 20 08 59 2025 53.0 -170.5 4.1 W OF NIKOLSKI ALASKA M74 T73 R69 Z101 B66 A78
04 20 08 59 2025 44.6 -112.5 2.6 SE OF LIMA MONTANA M108 T85 R51 Z115 B98 A113
04 20 08 32 2025 36.6 25.7 4.4 SW OF AMORGóS GREECE M61 T156 R42 Z148 B122 A110
04 20 08 10 2025 48.8 -119.5 3.2 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93 A108
04 20 06 35 2025 -19.1 -70.5 4.2 W OF CUYA CHILE M166 T95 R78 Z97 B131 A142
04 20 06 11 2025 35.4 140.0 4.5 NE OF KISARAZU JAPAN M40 T70 R91 Z84 B42 A45
04 20 05 50 2025 34.5 -117.3 2.7 MOUNTAIN VIEW ACRES CA M115 T76 R60 Z106 B94 A110
04 20 05 47 2025 -6.6 148.7 4.3 FINSCHHAFEN PAPUA NEW GUINEA M59 T38 R134 Z42 B3 A14
04 20 05 22 2025 -14.5 77.4 4.9 SOUTH INDIAN OCEAN" M40 T101 R113 Z78 B73 A55
04 20 04 46 2025 39.7 -123.5 2.1 KM OF LAYTONVILLE CA M108 T75 R60 Z106 B89 A105
04 20 04 40 2025 36.8 -121.6 2.8 SAN JUAN BAUTISTA CA M111 T75 R61 Z105 B90 A107
04 20 04 29 2025 35.7 -90.3 2.1 SW OF ETOWAH ARKANSAS M122 T96 R43 Z123 B116 A132
04 20 04 25 2025 36.8 -121.6 3.0 SAN JUAN BAUTISTA CA M111 T75 R61 Z105 B90 A107
04 20 04 07 2025 40.3 -124.5 2.4 W OF PETROLIA CA M107 T75 R60 Z106 B89 A105
04 20 02 21 2025 36.8 -121.6 2.7 SAN JUAN BAUTISTA CA M111 T75 R61 Z105 B90 A107
04 20 02 19 2025 -5.9 145.9 4.3 KAINANTU PAPUA NEW GUINEA M56 T41 R133 Z44 B5 A12
04 20 01 33 2025 32.1 -101.9 2.4 W OF STANTON TEXAS M123 T86 R53 Z113 B107 A124
04 20 01 17 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A122
04 20 01 14 2025 28.9 -99.0 2.2 E OF PEARSALL TEXAS M127 T87 R53 Z113 B109 A127
04 20 00 35 2025 -2.8 122.3 4.3 NNW OF KENDARI INDONESIA M35 T64 R125 Z57 B29 A13
04 20 00 28 2025 44.8 79.7 4.3 NNW OF ZHARKENT KAZAKHSTAN M26 T115 R66 Z118 B81 A73
04 20 00 10 2025 40.6 -125.1 2.6 WNW OF FERNDALE CA M106 T75 R60 Z106 B88 A104
April 20, 2025
The strongest earthquake in the world today was an M 5.9 south of Mindanao, Philippines. NEIC reported the mainshock was felt with intensity VII in Mindanao at Kalamansig (Slight damage); V in Banga, Buayan, Kiamba, IV in Kalawag, Surallah, III in Alabel, Davao, Katangawan, Maitum San Jose, Zamboanga and II in Koronadal, Polonuling, Silway.
Aftershocks of M 5.2 and M 5.2 were felt with intensity II-III in the same area.
PHIVOLCS reported intensity V in Kiamba, Sarangani; Lebak and Palimband, Sultan Kudarat and IV in Alabel, Glan, and Maitum, Sarangani; T'Boli and Tupi, South Cotabto, Kalamansig, Sultan Kudarat with II in City of General Santos; II in Davao Occidental; City of Davao and lesser intensity in Zamboanga, Davao del Sur.
This earthquake of M 5.9 was probably triggered by an M-class solar flare as
it occurred within a couple of minutes of the beginning of that flare, the
strongest in the past two days. It also occurred within minutes of local
solar midnight - a prime time for tidal and geomagnetic earthquake triggering.
Data from SWPC for this flare follow:
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7690 1610 1628 1632 C4.3 (April 19, 2025) 1.8E-03*
Mindanao M 5.9 16:11 UT
Forecast 171344 had expected this earthquake within about 15 km was likely
around April 18.
O: 19APR2025 16:11:15 5.9N 124.1E ML=5.9 EMSC Mindanao, Philippines
P: 18APR2025 171344 6.0N 124.0E 4.0-5.4 CAAAA Mindanao, Philippines
A moderately large earthquake of M 5.7 also occurred in Hindu Kush, Afghanistan today. NEIC reported it was felt with maximum intensity V in Peshawar, Northwest Frontier, Pakistan; IV in Lahore, and Sangala Hill, Punjab; III in Pakiestan at Abottabad, Tawalpindi and II in Islamabad, Kasur, and Wah. It was also felt with intensity II-III in Kabul, Afghanistan and India.
This event occurred within minutes of local solar noon and was probably
promoted by solar/geomagnetic or tidal effects which maximize near this hour.
Forecast 171437 had expected this event within about 100 km was likely
to occur around April 19, 2025.
O: 19APR2025 06:47:55 36.2N 71.2E ML=5.7 EMSC Hindu Kush, Afghanistan
P: 19APR2025 171437 37.0N 70.0E 3.8-5.4 CAAAA Hindu Kush/Pakistan
An earthquake of M 5.1 occurred today in the Central Mid-Atlantic Ridge. It was
not reported felt in this remote area. This epicenter is nearly antipodal to
TC 31P off northern Australia and may have been promoted by energy from
that source. In the previous issue of this summary this possibility had
been noted as:
"Tropical Cyclone 31P continued today in the area north of Australia with winds up to 45 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 11N 41W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days." (April 18, 2025)
The strongest earthquake in the U.S. or Canada today was an M 4.3 in southern Alaska. NEIC reported it was felt with intensity III in Anchorage, Elmendorf, Chugiak, Cooper Landing, Eagle River, Girdwood, Homer, Kenai, Wasilla, Sterling, Talkeetna and Willow with II inMatanuska- Susitna Borough, Fort Richardson, Palmer, Seward, Skwentna, Soldotna, Tyonek and Valdez.
An M 3.9 occurred today in the area of southern Alaska. NEIC reported it was felt with intensity III in Anchorage, Anchor Point, Cooper Landing and II in Clam Gulch, Eagle River and Girdwood.
NEIC reported an earthquake of M 4.5 in Southeastern Honshu, Japan was felt with intensity up to II-III in the area(s) of Southeastern Honshu, Japan was felt with intensity II in Tokyo at Tokyo and Ome and in Kawasaki, Kanagawa and Narita, Chiba, Japan.
NEIC reported an earthquake of M 4.4 in Dodecanese Islands, Greece was felt with intensity up to II-III in the area(s) of Dodecanese Islands, Greece in Kiklades at Mesaria and Naousa.
NEIC reported an earthquake of M 3.2 in northeastern Washington State was felt with intensity up to II-III in the area(s) of northeastern Washington State with IV in Tonasket; III in Loomis, Oroville and Seattle and in Walnut Grove, British Columbia, Canada.
NEIC reported an earthquake of M 2.6 in Eastern Los Angeles, California was felt with intensity up to II-III in the area(s) of Eastern Los Angeles, California with III in Adelanto, Apple Valley, Hesperia, Victorville, Wrightwood and II in Phelan.
NEIC reported earthquakes of M M 3.0, 2.8 and 2.7 in Central California were felt with intensity up to II-III in the area(s) of Salinas, Carmel and II in Marina, Seaside, Aromas and Gilroy.
NEIC reported an earthquake of M 2.6 off the coast of Northern California was felt with intensity up to II-III in the area(s) of Northern California at Trinidad.
NEIC reported an earthquake of M 5.3 in Samoa was felt with intensity up to II-III in the area(s) of Samoa with IV at American Samoa, III in Upolu, Samoa at Tulaele and II in Samea.
NEIC reported an earthquake of M 2.6 in Nevada was felt with intensity up to II-III in the area(s) of Nevada at Carson City.
NEIC reported an earthquake of M 3.1 off the coast of Oregon was felt with intensity up to II-III in the area(s) of Oregon, Washington and northern California.
NEIC reported an earthquake of M 5.2 in Central Peru was felt with intensity up to II-III in the area(s) of Central Peru with IV at Huanuco and III in Tingo Maria.
NEIC reported an earthquake of M 3.2 in Central Alaska was felt with intensity up to II-III in the area(s) of Central Alaska with IV in Chugiak; III in Anchorage, Eagle River and Palmer and II in Girdwood, and Wasilla.
NEIC reported an earthquake of M 3.1 in Southern California was felt with intensity up to II-III in the area(s) of Southern California with II n Los Angeles, Azusa, Camarillo and Ridgecrest.
TROPICAL CYCLONE 31P
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 31P 2025-04-20 00:00 UT 12.6S 140.2E 040 kts South of New Guinea/ North of Australia
Tropical Cyclone 31P continued today in the area north of Australia with winds up to 40 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 12N 40W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7660 1106 1114 1120 C1.5 (April 19, 2025) 1.2E-03
7690 1610 1628 1632 C4.3 (April 19, 2025) 1.8E-03 *
Mindanao M 5.9 16:11 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: disturbed April 20-21 major storms April 22. Solar M-flare chance: 40% X-class: 5% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 20 49 18 12:00 6 114 157
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC 31P (ADIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 20 08 59 2025 53.0 -170.5 4.1 W OF NIKOLSKI ALASKA M74 T73 R69 Z101 B66 E76
04 20 08 59 2025 44.6 -112.5 2.6 SE OF LIMA MONTANA M108 T85 R51 Z115 B98 E110
04 20 08 32 2025 36.6 25.7 4.4 SW OF AMORGóS GREECE M61 T156 R42 Z148 B122 E115
04 20 08 10 2025 48.8 -119.5 3.2 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93 E105
04 20 06 35 2025 -19.1 -70.5 4.2 W OF CUYA CHILE M166 T95 R78 Z97 B131 E137
04 20 06 11 2025 35.4 140.0 4.5 NE OF KISARAZU JAPAN M40 T70 R91 Z84 B42 E46
04 20 05 50 2025 34.5 -117.3 2.6 MOUNTAIN VIEW ACRES CA M115 T76 R60 Z106 B94 E106
04 20 05 47 2025 -6.6 148.7 4.3 FINSCHHAFEN PAPUA NEW GUINEA M59 T38 R134 Z42 B3 E9
04 20 05 22 2025 -14.5 77.4 4.9 SOUTH INDIAN OCEAN" M40 T101 R113 Z78 B73 E61
04 20 04 46 2025 39.7 -123.5 2.1 KM OF LAYTONVILLE CA M108 T75 R60 Z106 B89 E101
04 20 04 40 2025 36.8 -121.6 2.8 SAN JUAN BAUTISTA CA M111 T75 R61 Z105 B90 E103
04 20 04 25 2025 36.8 -121.6 3.0 SAN JUAN BAUTISTA CA M111 T75 R61 Z105 B90 E103
04 20 04 07 2025 40.3 -124.5 2.4 W OF PETROLIA CA M107 T75 R60 Z106 B89 E101
04 20 02 21 2025 36.8 -121.6 2.7 SAN JUAN BAUTISTA CA M111 T75 R61 Z105 B90 E103
04 20 02 19 2025 -5.9 145.9 4.3 KAINANTU PAPUA NEW GUINEA M56 T41 R133 Z44 B5 E7
04 20 00 35 2025 -2.8 122.3 4.3 NNW OF KENDARI INDONESIA M35 T64 R125 Z57 B29 E19
04 20 00 28 2025 44.8 79.7 4.3 NNW OF ZHARKENT KAZAKHSTAN M26 T115 R66 Z118 B81 E77
04 20 00 10 2025 40.6 -125.1 2.6 WNW OF FERNDALE CA M106 T75 R60 Z106 B88 E100
04 19 23 30 2025 -15.6 -74.0 4.2 NNE OF TOCOTA PERU M168 T93 R77 Z97 B129 E137
04 19 23 06 2025 1.7 128.7 4.8 E OF TOBELO INDONESIA M37 T60 R123 Z58 B24 E16
04 19 23 04 2025 10.7 -85.9 4.4 SARDINAL COSTA RICA M147 T91 R60 Z110 B122 E134
04 19 20 49 2025 33.1 -116.6 2.1 SSW OF JULIAN CA M117 T76 R61 Z105 B94 E107
04 19 19 45 2025 38.8 -122.8 2.4 THE GEYSERS CA M109 T75 R60 Z106 B90 E102
04 19 18 41 2025 45.1 -75.5 2.1 W OF WINCHESTER CANADA M112 T109 R29 Z138 B123 E134
04 19 18 37 2025 54.4 -158.8 3.5 SAND POINT ALASKA M80 T75 R64 Z105 B72 E82
04 19 18 26 2025 31.5 -104.0 2.0 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105 E117
04 19 18 24 2025 86.3 35.1 4.2 FRANZ JOSEF LAND M66 T113 R36 Z138 B97 E101
04 19 18 00 2025 2.7 128.4 4.2 NNE OF TOBELO INDONESIA M36 T60 R122 Z59 B24 E17
04 19 17 37 2025 5.9 124.1 5.2 SW OF MALISBENG PHILIPPINES M31 T66 R118 Z64 B29 E23
04 19 16 55 2025 -15.1 -173.6 5.3 NNE OF HIHIFO TONGA M95 T5 R131 Z35 B35 E45
04 19 16 50 2025 5.8 124.2 5.2 SSW OF MALISBENG PHILIPPINES M31 T66 R118 Z64 B29 E22
04 19 16 11 2025 5.8 124.1 5.9 SW OF MALISBENG PHILIPPINES M31 T66 R118 Z64 B29 E22
04 19 14 53 2025 39.4 -123.3 2.2 ESE OF WILLITS CA M108 T75 R60 Z106 B89 E102
04 19 14 49 2025 39.1 -119.0 2.6 KM NE OF YERINGTON M111 T78 R58 Z108 B93 E105
04 19 13 50 2025 7.1 -34.3 5.1 CENTRAL MID-ATLANTIC RIDGE" M123 T138 R45 Z136 B173 E173
04 19 13 24 2025 31.7 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104 E117
04 19 13 12 2025 43.4 -127.1 3.1 W OF BANDON OREGON M103 T76 R59 Z107 B87 E99
04 19 13 01 2025 60.2 -151.9 3.9 SOUTHERN ALASKA M81 T82 R57 Z111 B79 E88
04 19 12 43 2025 -23.9 -13.6 4.9 SOUTHERN MID-ATLANTIC RIDGE" M115 T132 R78 Z109 B147 E136
04 19 12 42 2025 1.9 -96.6 4.8 THE GALAPAGOS ISLANDS M153 T78 R73 Z96 B111 E123
04 19 12 38 2025 -18.6 -175.5 4.5 W OF NEIAFU TONGA M95 T2 R135 Z31 B34 E43
04 19 11 56 2025 -9.4 -76.1 5.2 TINGO MARÃA PERU M165 T94 R72 Z101 B129 E138
04 19 11 42 2025 -18.7 -177.6 4.3 FIJI REGION" M93 T3 R136 Z31 B32 E41
04 19 09 40 2025 19.1 -66.1 3.3 SAN JUAN PUERTO RICO M135 T112 R42 Z129 B140 E153
04 19 08 43 2025 13.6 -91.9 4.3 S OF CHAMPERICO GUATEMALA M143 T87 R61 Z108 B117 E129
04 19 08 40 2025 62.6 -152.2 3.2 CENTRAL ALASKA M80 T84 R55 Z113 B80 E89
04 19 08 35 2025 40.6 83.9 4.3 SSE OF KUQA CHINA M21 T111 R71 Z113 B77 E72
04 19 08 24 2025 35.3 -117.8 2.4 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93 E106
04 19 08 02 2025 42.1 -120.2 2.1 NEW PINE CREEK OREGON M108 T79 R56 Z109 B92 E104
04 19 07 45 2025 38.8 -122.8 2.1 THE GEYSERS CA M109 T75 R60 Z106 B90 E102
04 19 07 44 2025 35.3 -117.8 3.1 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93 E106
04 19 07 44 2025 5.6 126.5 4.4 SSE OF PONDAGUITAN PHILIPPINES M33 T63 R119 Z62 B27 E21
04 19 07 18 2025 61.2 -151.5 4.3 SOUTHERN ALASKA M81 T83 R56 Z112 B80 E89
04 19 06 47 2025 36.2 71.2 5.7 SSW OF ASHKÄSHAM AFGHANISTAN M25 T121 R69 Z118 B85 E79
04 19 06 14 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 E117
04 19 04 51 2025 -21.5 -66.9 4.6 SW OF ATOCHA BOLIVIA M164 T97 R79 Z97 B133 E138
04 19 03 14 2025 2.5 -31.0 4.8 CENTRAL MID-ATLANTIC RIDGE" M122 T139 R50 Z133 B175 E167
04 19 02 45 2025 39.1 -119.0 2.4 KM ENE OF YERINGTON M111 T78 R58 Z108 B93 E105
04 19 02 20 2025 -3.5 -77.7 4.6 E OF GUALAQUIZA ECUADOR M160 T94 R67 Z105 B129 E139
04 19 01 15 2025 -29.1 -178.5 4.5 KERMADEC ISLANDS NEW ZEALAND" M96 T9 R145 Z21 B36 E42
04 19 01 12 2025 53.8 -164.1 3.5 ESE OF AKUTAN ALASKA M78 T74 R66 Z103 B70 E79
April 19, 2025
An unusually large event of M 4.6 shook the area of Antigua and Barbuda today. NEIC reported it was felt with intensity IV in Antigua and Barbuda at Cedar Grove and in Saint Kitts and Nevis at Basseterre, Newcastlr and Cotton Ground with III in Carlisle, Antigua and Barbuda and Mansion, Christ Church Saint Kitts and Nevis. It may have been felt as far as Floreida where it was reported with intensity II in Everglades-Monroe County.
This event occurred at local solar noon and was probably promoted by tidal and/or
geomagnetic effects which dominate near this hour.
The last earthquake within about 150 km of this epicenter in the area of
Antigua and Barbuda occurred as an M 4.9 on November 15, 2024 followied by an M 4.8 on November 16, 2024.
At the time this summary noted:
"A series of light to moderate earthquakes began today in the region of Antigua and Barbuda, Caribbean with M 4.9. NEIC reported maximum intensity V in Netherlands Antilles at Cul De Sac Sint; III in Antigua and Barbuda at Potters Village and Freetown and in Basseterre, Saint Kitts and Nevis with II in Guadeloupe, Saint Kitts and Nevis and Antigua and Barduda.
EMSC reported it was felt with moderate to strong motion in Codrington, Antigua and Barbuda and lightly in Guadeloupe at Baie-Mahault and Lamentin." (November 16, 2024)
The last earthquake in the Antigua and Barbuda area of significantly larger
magnitude than today's M 4.6 occurred as an M 5.2 on December 2, 2023. At the
time this summary noted:
"An M 5.3 and M 4.5 also continued the seismic swarm today in the Guadeloupe
region of the Leeward Islands, Caribbean. This had been noted in the previous
issue of this summary as:
"A series of moderate earthquakes also occurred today in the Guadeloupe Islands of The Leeward
Islands in the eastern Caribbean. The last strong earthquake in Guadeloupe
occurred as an M 6.2 on January 20, 2023. Aftershocks of magnitude around 5.0
occurred on February 2 and April 16, 2023. At the time of the mainshock in
January 2023 this summary noted:
"A strong earthquake of M 6.2 also occurred in the area of Guadeloupe today where it was
widely felt. NEIC reported maximum intensity IV in Guadeloupe in Basse-Terre at Le Gosier, Saint-Claude, Baie-Mahault, Petit-Bourg and II-III in Bouillant, Point-Noire, Sante-Rose, Lamentin, Terre-de-Bas and in Montserrat.
This earthquake occurred at intermediate focal depth of 166 km. Several foreshocks hit the area in the past week.
The last earthquake in the west Indies within about 300 km of today's event
of M 6.2 with equal or greater magnitude was an M 7.4 on November 29, 2007. Like today's
earthquake it occurred at an intermediate depth of 156 km about 250 km southeast
of today's epicenter. The last and only event within about 100 km of this epicenter
with equal or larger magnitude in the past 35 years was an M 6.2 on November 21, 2004." (January 21, 2023, December 2, 2023)
Today's event in the eastern Caribbean was probably also promoted by its antipodal
location to Tropical Storm Errol north of Australia. Near the time of this
event in Antigua and Barbuda TC Errol was located at:
"TC ERROL 2025-04-18 06:00 UT 17.2S 119.4E 130 kts North of Australia
Tropical Cyclone Errol (29S) continued today in the area north of Australia with winds up to 130 kts. The antipode of this epicenter is at 15N 60W. The antipode of this epicenter will encounter the Leeward and Windward Islands of the eastern Caribbean. Energy from this storm could enhance seismicity in that region around April 16-18, 2025 near (15N 60W) and later to the north near the Virgin Islands. These areas could experience seismic enhancement as TC Errol is antipodal. An earthquake today in Martinique at 15N 60W of M 4.0 was likely triggered by antipodal energy from TC Errol." (April 18, 2025)
The position of today's earthquake was given by EMSC as:
O: 18APR2025 17:31:23 17.6N 62.0W ML=4.6 EMSC Codrington, Antigua and Barbuda.
This is within about 100 km of the exact antipode of TC Errol.
Two earthquakes of M 5.2 each also hit northern Colombia toeay. NEIC reported they were felt with intensity III in Colombia at Bogota and in Santander at Piedecuesta with II in San Gil and Floridablanca and Medellin, Antioquia.
NEIC reported an earthquake of M 4.1 in Santiago, Chile was felt with intensity up to II-III in the area(s) of Santiago, Chile.
NEIC reported an earthquake of M 4.6 in Guerrero, Mexico was felt with intensity up to II-III in the area(s) of Guerrero, Mexico in Tlalnepantla, Mexico.
NEIC reported an earthquake of M 5.4 in the Komandorsky Islands, Russia may have been felt with intensity up to II-III in the area(s) of the Komandorsky Islands, Russia.
NEIC reported an earthquake of M 5.2 in Eastern Honshu, Japan was felt with intensity up to II-III in the area(s) of Eastern Honshu, JapanEastern Honshu, Japan with V in Toyoshina, Nagano; IV in Anjo Aichi, and in Nagano at Marsumoto and Omachi and II-II in Gunma II in Aichi and Kanagawaand Niigata.
NEIC reported an earthquake of M 2.6 in Northern California was felt with intensity up to II-III in the area(s) of Northern California at Boonville with IV.
NEIC reported an earthquake of M 2.4 in Southern California was felt with intensity up to II-III in the area(s) of Southern California with III in Julian and II in Escondido, Oceanside, Poway, Ramona.
TROPICAL CYCLONE 31P
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 31P 2025-04-19 00:00 UT 12.6S 140.2E 040 kts South of New Guinea/ North of Australia
Tropical Cyclone 31P continued today in the area north of Australia with winds up to 40 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 12N 40W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7510 0410 0422 0429 C2.2 (April 18, 2025) 2.7E-03
7530 0551 0601 0614 C1.8 (April 18, 2025) 2.5E-03
7560 1203 1212 1220 C1.6 (April 18, 2025) 1.7E-03
Kermadec M 4.2 12:37 UT
Santa Cruz M 4.5 12:35 UT
7590 2111 2117 2124 C1.4 (April 18, 2025) 6.1E-04
7600 2148 2152 2156 C2.6 (April 18, 2025) 1.3E-03
Kermadec M 4.9 22:03 UT
7630 2308 2350 0015 M4.4 (April 18, 2025) 8.8E-02
Luzon M 4.5 23:33 UT
Kermadec M 4.5 01:15 UT
Guerrer0 M 5.0 01:15 UT
Myanmar M 4.2 01:20 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 19-21. Solar M-flare chance: 40% X-class: 5% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 13 15 11 20:00 4 113 156
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC Errol (EDIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 19 07 44 2025 35.3 -117.8 3.1 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93 E106
04 19 07 18 2025 61.2 -151.5 4.3 SOUTHERN ALASKA M81 T83 R56 Z112 B80 E89
04 19 06 47 2025 36.2 71.2 5.7 SSW OF ASHKÄSHAM AFGHANISTAN M25 T121 R69 Z118 B85 E79
04 19 06 14 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 E117
04 19 04 51 2025 -21.5 -66.9 4.6 SW OF ATOCHA BOLIVIA M164 T97 R79 Z97 B133 E138
04 19 03 14 2025 2.5 -31.0 4.8 CENTRAL MID-ATLANTIC RIDGE" M122 T139 R50 Z133 B175 E167
04 19 02 45 2025 39.1 -119.0 2.4 KM ENE OF YERINGTON M111 T78 R58 Z108 B93 E105
04 19 02 20 2025 -3.5 -77.7 4.6 E OF GUALAQUIZA ECUADOR M160 T94 R67 Z105 B129 E139
04 19 01 15 2025 -29.1 -178.5 4.5 KERMADEC ISLANDS NEW ZEALAND" M96 T9 R145 Z21 B36 E42
04 19 01 12 2025 53.8 -164.1 3.5 ESE OF AKUTAN ALASKA M78 T74 R66 Z103 B70 E79
04 18 23 56 2025 47.6 -122.0 2.4 CITY OF SAMMAMISH WASHINGTON M102 T82 R54 Z112 B91 E103
04 18 22 03 2025 -28.8 -177.6 4.9 KERMADEC ISLANDS REGION" M97 T9 R145 Z22 B36 E43
04 18 21 55 2025 19.4 -65.6 3.4 SUáREZ PUERTO RICO M135 T113 R42 Z130 B141 E153
04 18 21 08 2025 41.9 144.3 4.2 ESE OF HIROO JAPAN M44 T72 R85 Z90 B48 E52
04 18 20 56 2025 -39.3 176.3 4.2 BAY VIEW NEW ZEALAND M96 T20 R156 Z10 B39 E42
04 18 20 53 2025 31.7 -104.3 2.4 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 E117
04 18 20 48 2025 18.3 -68.8 4.1 LA ROMANA DOMINICAN REPUBLIC M137 T109 R44 Z127 B138 E151
04 18 19 54 2025 -33.2 -70.1 4.1 CHICUREO ABAJO CHILE M163 T89 R91 Z85 B124 E127
04 18 19 51 2025 21.4 120.3 4.5 SSW OF HENGCHUN TAIWAN M22 T76 R102 Z79 B41 E37
04 18 19 42 2025 -6.2 151.8 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E12
04 18 19 40 2025 32.1 -101.9 2.0 WSW OF STANTON TEXAS M123 T86 R53 Z113 B107 E119
04 18 19 18 2025 16.4 -98.7 4.6 SAN NICOLáS MEXICO M139 T82 R62 Z105 B110 E122
04 18 18 41 2025 55.4 164.4 5.4 UST’-KAMCHATSK STARYY RUSSIA M60 T77 R71 Z101 B62 E69
04 18 18 40 2025 55.5 164.3 4.8 UST’-KAMCHATSK STARYY RUSSIA M59 T77 R71 Z101 B62 E69
04 18 18 30 2025 49.4 -120.5 2.0 SSE OF PRINCETON CANADA M101 T83 R52 Z114 B93 E104
04 18 18 01 2025 20.4 96.1 4.1 YAMETHIN BURMA (MYANMAR) M1 T96 R94 Z91 B60 E53
04 18 17 31 2025 17.6 -62.0 4.6 CODRINGTON ANTIGUA AND BARBUDA M135 T115 R42 Z131 B145 E157
04 18 17 14 2025 -41.4 -72.4 4.4 LA ENSENADA CHILE M158 T85 R100 Z78 B117 E119
04 18 17 12 2025 54.5 -161.8 3.6 KING COVE ALASKA M79 T75 R65 Z104 B71 E81
04 18 16 33 2025 33.1 -116.6 2.2 SSW OF JULIAN CA M117 T76 R61 Z105 B94 E107
04 18 15 49 2025 -3.6 145.2 4.5 ANGORAM PAPUA NEW GUINEA M54 T43 R130 Z46 B6 E8
04 18 15 16 2025 21.6 143.1 4.4 MARIANA ISLANDS REGION" M43 T59 R105 Z71 B28 E32
04 18 14 41 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 E117
04 18 14 26 2025 -16.0 -174.8 4.9 W OF HIHIFO TONGA M95 T4 R133 Z34 B34 E44
04 18 13 25 2025 43.5 -110.6 2.9 E OF JACKSON WYOMING M110 T85 R50 Z116 B99 E111
04 18 13 01 2025 31.7 -104.3 3.3 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 E117
04 18 12 37 2025 -31.2 179.6 4.2 KERMADEC ISLANDS REGION" M96 T12 R148 Z18 B36 E41
04 18 12 35 2025 -11.5 166.3 4.5 LATA SOLOMON ISLANDS M76 T20 R136 Z35 B15 E25
04 18 11 35 2025 47.4 -113.0 2.2 NNE OF OVANDO MONTANA M106 T86 R49 Z117 B97 E109
04 18 11 28 2025 31.7 -104.3 2.3 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 E117
04 18 11 19 2025 36.5 137.9 5.2 ENE OF ÅŒMACHI JAPAN M39 T72 R90 Z86 B44 E47
04 18 10 31 2025 6.8 -73.1 5.2 NNE OF JORDáN COLOMBIA M149 T102 R56 Z115 B135 E147
04 18 10 21 2025 39.0 -123.4 2.6 NW OF BOONVILLE CA M109 T75 R60 Z106 B89 E101
04 18 09 55 2025 33.1 -116.6 2.5 SW OF JULIAN CA M117 T76 R61 Z105 B94 E107
04 18 08 59 2025 52.9 -167.6 3.2 E OF NIKOLSKI ALASKA M76 T73 R68 Z101 B68 E77
04 18 08 48 2025 6.7 -73.1 4.8 SSW OF JORDáN COLOMBIA M149 T102 R56 Z115 B135 E147
04 18 07 58 2025 -6.2 151.4 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E12
04 18 07 33 2025 -6.2 151.6 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E12
04 18 07 28 2025 19.2 -66.0 3.4 SAN JUAN PUERTO RICO M135 T112 R42 Z129 B141 E153
04 18 07 24 2025 -6.2 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E12
04 18 06 42 2025 45.1 -124.3 2.5 LINCOLN CITY OREGON M103 T79 R57 Z110 B89 E101
04 18 06 33 2025 19.4 -108.9 4.3 REVILLA GIGEDO ISLANDS REGION" M132 T74 R66 Z100 B100 E113
04 18 05 16 2025 54.9 -160.0 3.1 SAND POINT ALASKA M80 T75 R64 Z105 B72 E82
04 18 05 07 2025 43.5 -110.6 3.9 E OF JACKSON WYOMING M110 T85 R50 Z116 B99 E111
04 18 03 59 2025 -36.5 -70.9 4.7 LAS OVEJAS ARGENTINA M161 T88 R95 Z82 B121 E124
04 18 03 44 2025 -7.1 129.2 4.7 LOSPALOS TIMOR LESTE M43 T56 R132 Z50 B22 E11
04 18 02 57 2025 -6.3 147.9 4.5 FINSCHHAFEN PAPUA NEW GUINEA M58 T39 R133 Z43 B3 E9
04 18 02 36 2025 19.1 -68.4 3.9 PUNTA CANA DOMINICAN REPUBLIC M136 T110 R43 Z127 B138 E151
04 18 02 36 2025 17.2 -68.7 3.0 DE YUMA DOMINICAN REPUBLIC M138 T109 R45 Z126 B138 E151
04 18 02 13 2025 -9.8 114.0 4.5 SSW OF MUNCAR INDONESIA M36 T69 R129 Z57 B37 E25
04 18 00 12 2025 31.6 -104.5 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104 E117
04 18 00 10 2025 -23.5 -68.1 5.6 PEDRO DE ATACAMA CHILE M165 T95 R82 Z94 B131 E136
April 18, 2025
With today's calming of the geomagnetic storm of the past two days, global
seismicity returned to temporarily relative quiet. This is not expected to
last long, perhaps being broken when ionospheric ring currents re-energize
around April 20-22. The most likely strong to major earthquake at that
time could occur about 10 degrees either side of the geomagnetic equator.
Some of this may be foreshadowed today with an M 5.6 in Atacama, Chile
and enhanced seismicity throughout much of South and Central America including an M 5.0
in Colombia and M 4.7 in Maule, Chile. As South America has been relatively
quiet through much of the strong seismicity since late March, 2025 and the
solar eclipse of March 29, this resumption of moderate earthquakes may
be a significant change. The geomagnetic equator runs through South America
in the area of central and southern Peru and seismicity in this area often
appears to be enhanced several days following major geomagnetic storms.
NEIC reported the M 5.6 in Atacama, Northern Chile was felt with intensity II in Tacna, southern Peru and lightly in Iquique, Tarapaca, Chile.
EMSC reported moderate shaking in Chile at Calama, Antofagasta, Sierra Gorda, Tocopilla, and Iquique.
This is the largest earthquake in the Atacama region of Chile within about 150 km
of this epicenter since an M 6.1 on March 6, 2025. A major M 7.4 hit
near today's epicenter on July 19, 2024. At the time this summary noted:
"The strongest earthquake in the world today was an M 7.4 in northern Chile. NEIC reported it was felt with intensity up to VII with
some damage in the Atacama, Chile region near San Pedro de Atacama.
EMSC reported strong and long shaking in Atacama, Chile in San Pedro de Atacama, Calama, Sierra Gorda, Antofagasta, Tocopilla, Mejillones, Alto Hospicio, Iquique, Chanaral, Copiapo, Arica, Paiguano, Arequipa, with light shaking in Coquimbo, Valparaiso, Vina del Mar, Nunoa, Macul and others.
This is the strongest earthquake in the world since an M 7.4 in Taiwan in early
April. The last earthquake within about 300 km of today's epicenter with
M>=7.4 occurred on November 14, 2007 with M 7.7. The only other such event
in the general area of today's epicenter of equal or larger magnitude in the
past 35 years was an M 8.0 on July 30, 1995." (July 19, 2024)
Forecast 171581 had expected enhanced seismicity within about 100 km of this
epicenter was likely around April 19.
O: 18APR2025 00:10:18 23.5S 68.1W ML=5.6 ANSS Atacama, Chile
P: 19APR2025 171581 23.0N 67.0W 4.0-5.6 AAAAA Argentina
CSN reported the following parameters for this and an event in Bio-Bio today:
18-04-2025 00:10 23.47S 68.22W 139 5.7 IV Antofagasta at Mejillones, Sierra Gorda, San Pedro de Atacama, Tocopilla; III in Antofagasta, Calama, and in Atacama with III in Diego de Almagro and El Salvador, Chile.
NEIC reported the earthquake of M 4.8-5.0 in Colombia was felt with intensity up to II-III in the area(s) of Colombia with intensity III in Bucaramanga, Santander and II in Envigado, Antioquia.
The strongest earthquake in the U.S. or Canada today was an M 3.9 in the Tetons of Wyoming. NEIC reported it was felt with intensity III in Jackson and Wilson, Wyoming and II in Lander, Wyoming and III in Idaho at Driggs and II in Idaho Falls.
The last earthquake with M>=3.9 within about 100 km of Jackson, Wyoming was
recorded as an M 4.8 on August 27, 2016. At the time this summary noted:
"A moderate earthquake of M 4.8 in the Grand Teton area of Wyoming was widely felt today.
NEIC reported this earthquake was felt with maximum intensity IV in Wyoming at Bondurant and Cora, and with lesser intensity
within about 200 km of the epicenter. Intensity II-III shaking was reported from
Wyoming at Jackson about 35 km from the epicenter where 250 people reported felt effects to NEIC.
Other communities reporting light shaking in Wyoming included Daniel, Kelly, Etna, Grover, Wilson, Pinedale, Freedom, Dubois, Bedford, Thayne, Auburn, Alta, Moran, Moose, Cody, Lander, Yellowstong National Park, Green River, Thermopolis, Rock Springs and Evanston; and in Idaho at Idaho Falls, Victor, Driggs, Tetonia, Soda Springs, Idaho Falls, Ashton, Rexburg and Rigby, among others.
Moderate earthquakes in this area are not unknown but the region has been quiet
for an appreciable amount of time. This earthquake is the latest in a series
of event along the front range of the Rocky Mountains which has included light
earthquakes in Colorado near Trinidad, Pueblo and Greeley and appears to be
migrating to the north with this event in Wyoming.
...
This is the strongest earthquake in this region since an M 4.8 on August 5, 2010. The last of larger magnitude was
an M 5.0 twelve years ago on January 7, 2004. A series of events occurred
in the area following the Northridge California event in January, 1994. This
continued from February through April, 1994." (August 27, 2016)
Forecast 171526 had expected today's event in Wyoming was likely within about
50 km of this epicenter around April 17, 2025.
O: 18APR2025 05:07:14 43.4N 110.5W ML=3.9 ANSS Jackson, Wyoming
P: 17APR2025 171526 43.0N 111.0W 2.0-4.2 AAAAA Yellowstone/Wyoming
A highly unusual earthquake of M 4.8 occurred today in the area of South Africa near Klerksdorp.
EMSC reported it was felt with moderate intensity in North West Province, South Africa at Klerksdorp, Matlosana, Johannesburg.
The last earthquake in South Africa within about 250 km of this epicenter
with M>=4.8 occurred on June 11, 2023 with M 5.0 but the last earthquake in the
area of significantly larger magnitude was an M 5.2 on April 3, 2017. At the time
this summary noted:
"A rare moderate earthquake of M 5.2 hit near Stilfontein, South Africa today.
NEIC reported it was felt with intensity VI in Kerksdorp, North West and IV in Potchefstroom, North West and III in Johannesburg, Gauteng, South Africa.
EMSC reported a loud earthquake noise which with the shaking woke many in Stilfontein, Kroonstad, Krugersdorp, Randburg, Germiston, Centurion, Pretoria, South Africa. This epicenter is in the antipodal area of the M 4.5 in Hawaii which occurred
on March 23. This report has previously linked seismicity in these two areas
due to their antipodal locations. The epicenter lies about 15 degrees south of
the geomagnetic equator and the current strong geomagnetic storm may have helped
promote this event. The last earthquake within about 200 km of this epicenter
in South Africa with M>=5.2 was an M 5.2-5.4 on August 5, 2014. The largest
earthquake in the region in the past 25 years was an M 5.7 on April 22, 1999. This
event also followed a moderately strong earthquake in Hawaii. The only other
such event in South Africa in the past 25 years was an M 5.2 on February 10, 1997." (April 3, 2017)
Forecast 171587 had expected today's event was likely within about 100 km
of this epicenter around April 19, 2025.
O: 17APR2025 08:57:30 26.9S 26.7E ML=4.8 EMSC South Africa
P: 19APR2025 171587 26.0S 28.0E 3.0-4.4 AAAAA Rep. South Africa
NEIC reported an earthquake of M 4.7 in Argentina was felt with intensity up to II-III in the area(s) of Argentina in Bio Bio Chile at Talcahuano.
EMSC reported strong shaking in Chile at Coihueco, San Ignacio, San Clemente, Talca, Cabrer0, Curico, Constitucion, Concepcion, Estacion Central.
CSN reported the following parameters for this event in Bio-Bio today:
18-04-2025 03:59 36.44S 71.05W 139 4.8 III Maule at Talca, Cauquenes, San Javier, Hualane; II in Sagrada Familia, Linares, Llico, Constitucion, Pencahue, and in Nuble with III in Chillan and II in Yungay and Ranquil, Chile.
NEIC reported an earthquake of M 4.5 south of Bali was felt with intensity up to II-III in the area(s) of Bali with IVin Ubud and III in Kuta, Indonesia.
EMSC reported moderate shaking woke people in Ubud, Indonesia.
TROPICAL CYCLONE 31P
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 31P 2025-04-18 00:00 UT 11.2S 139.7E 045 kts South of New Guinea/ North of Australia
Tropical Cyclone 31P formed today in the area north of Australia with winds up to 45 kts. It is expected to track to the south and east over the next several days. The antipode of this epicenter is at 11N 41W. Energy from this storm could enhance seismicity in the region near the Mid-Atlantic ridge in the next several days.
TROPICAL CYCLONE ERROL (29S)
---- ------- ---------- -------- ----- ------ ------- ---------------
TC ERROL 2025-04-18 00:00 UT 16.0S 123.9E 050 kts North of Australia
Tropical Cyclone Errol (29S) continued today in the area north of Australia with winds up to 50 kts. The antipode of this epicenter is at 16N 56W. Energy from this storm could enhance seismicity in the region near the eastern Caribbean but with the turn to the southeast of TC Errol, the danger of a moderate earthquake in this area has been greatly reduced.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7360 0458 0505 0508 C1.5 (April 17, 2025) 8.4E-04
7390 0932 0946 0952 C2.8 (April 17, 2025) 2.5E-03
Galapagos M 5.2 09:45 UT
7400 1401 1405 1411 C2.5 (April 17, 2025) 7.5E-04
7410 1411 1422 1434 C4.6 (April 17, 2025) 5.6E-03
El Salvador M 4.2 14:24 UT
Oaxaca M 4.0 14:14 UT
7440 2144 2153 2200 C1.5 (April 17, 2025) 4.0E-04
7450 2200 2204 2206 C2.1 (April 17, 2025) 9.1E-04
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 18 disturbed April 19-20. Solar M-flare chance: 55% X-class: 10% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 11 7 11 03:00 4 118 151
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC Errol (EDIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 18 08 48 2025 6.7 -73.1 4.8 SSW OF JORDáN COLOMBIA M149 T102 R56 Z115 B135 E164
04 18 07 33 2025 -6.2 151.6 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E33
04 18 07 28 2025 19.2 -66.0 3.4 SAN JUAN PUERTO RICO M135 T112 R42 Z129 B141 E174
04 18 07 24 2025 -6.2 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E33
04 18 06 33 2025 19.4 -108.9 4.3 REVILLA GIGEDO ISLANDS REGION" M132 T74 R66 Z100 B100 E134
04 18 05 07 2025 43.5 -110.6 3.9 E OF JACKSON WYOMING M110 T85 R50 Z116 B99 E129
04 18 03 59 2025 -36.5 -70.9 4.7 LAS OVEJAS ARGENTINA M161 T88 R95 Z82 B121 E126
04 18 03 44 2025 -7.1 129.2 4.7 LOSPALOS TIMOR LESTE M43 T56 R132 Z50 B22 E13
04 18 02 57 2025 -6.3 147.9 4.5 FINSCHHAFEN PAPUA NEW GUINEA M58 T39 R133 Z43 B3 E29
04 18 02 36 2025 19.1 -68.4 3.9 PUNTA CANA DOMINICAN REPUBLIC M136 T110 R43 Z127 B138 E172
04 18 02 36 2025 17.2 -68.7 3.0 DE YUMA DOMINICAN REPUBLIC M138 T109 R45 Z126 B138 E172
04 18 02 13 2025 -9.8 114.0 4.5 SSW OF MUNCAR INDONESIA M36 T69 R129 Z57 B37 E7
04 18 00 12 2025 31.6 -104.6 2.4 VAN HORN TEXAS M123 T84 R55 Z111 B104 E137
04 18 00 10 2025 -23.5 -68.1 5.6 PEDRO DE ATACAMA CHILE M165 T95 R82 Z94 B131 E140
04 18 00 01 2025 -6.3 151.4 4.8 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0 E33
04 17 23 45 2025 36.7 -121.5 2.0 WSW OF RIDGEMARK CA M111 T75 R61 Z105 B90 E122
04 17 22 31 2025 33.1 -116.6 2.6 SSW OF JULIAN CA M117 T76 R61 Z105 B94 E127
04 17 21 57 2025 66.2 -142.6 3.0 NORTHERN ALASKA M81 T89 R50 Z119 B85 E107
04 17 21 27 2025 22.7 96.1 4.3 SHWEBO BURMA (MYANMAR) M0 T97 R92 Z93 B61 E44
04 17 21 25 2025 49.4 -120.5 2.2 S OF PRINCETON CANADA M101 T83 R52 Z114 B93 E121
04 17 20 09 2025 -7.0 130.5 4.4 WSW OF TUAL INDONESIA M44 T55 R132 Z49 B21 E14
04 17 20 03 2025 40.3 -124.8 2.3 W OF PETROLIA CA M107 T75 R60 Z106 B88 E120
04 17 19 43 2025 33.0 -116.6 2.3 SSE OF JULIAN CA M117 T76 R61 Z105 B94 E127
04 17 19 31 2025 52.5 -34.1 4.6 REYKJANES RIDGE" M94 T135 R1 Z165 B133 E137
04 17 18 57 2025 39.1 -119.0 2.6 KM ENE OF YERINGTON M111 T78 R58 Z108 B93 E124
04 17 18 17 2025 51.9 -169.4 4.2 SSW OF NIKOLSKI ALASKA M75 T71 R69 Z100 B66 E91
04 17 17 59 2025 37.5 -117.5 2.4 SSE OF SILVER PEAK M112 T78 R58 Z108 B94 E126
04 17 16 01 2025 -6.4 151.9 4.7 KIMBE PAPUA NEW GUINEA M61 T35 R133 Z41 B0 E33
04 17 15 46 2025 31.6 -104.5 2.0 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104 E137
04 17 11 12 2025 37.2 -118.2 2.6 BIG PINE CA M112 T77 R59 Z107 B93 E125
04 17 10 13 2025 33.5 -116.6 2.5 SE OF ANZA CA M116 T76 R60 Z105 B94 E127
04 17 09 45 2025 2.2 -96.5 5.2 THE GALAPAGOS ISLANDS M153 T78 R72 Z96 B111 E142
04 17 07 50 2025 39.7 -120.2 2.1 ENE OF LOYALTON CA M109 T77 R58 Z108 B92 E123
04 17 07 26 2025 -8.7 126.9 4.9 LOSPALOS TIMOR LESTE M43 T58 R132 Z50 B24 E10
04 17 06 32 2025 22.1 96.1 4.5 MANDALAY BURMA (MYANMAR) M0 T97 R92 Z92 B61 E44
04 17 04 34 2025 -11.2 115.8 5.2 NUSA DUA INDONESIA M38 T67 R131 Z55 B35 E5
04 17 03 56 2025 -19.0 -67.4 4.4 WSW OF CHALLAPATA BOLIVIA M164 T98 R77 Z98 B134 E144
04 17 02 11 2025 52.4 -174.5 4.0 NW OF ATKA ALASKA M72 T72 R70 Z100 B64 E88
04 17 01 50 2025 47.4 -113.0 2.5 NNE OF OVANDO MONTANA M106 T86 R49 Z117 B97 E127
04 17 01 14 2025 -17.2 -173.2 4.9 SSE OF HIHIFO TONGA M97 T3 R133 Z34 B36 E64
04 17 00 51 2025 0.4 124.8 5.6 ESE OF MODISI INDONESIA M35 T63 R123 Z59 B27 E17
April 17, 2025
A severe geomagnetic storm began today about 16:00 UT (April 16). It reached
maximum Planetary Kp of 8 around 22:00-23:00 UT. The last geomagnetic storm
of greater disturbance occurred on January 1, 2025 with A-index (planetary)
of 86. Today's AP index reached 77. A major earthquake of M 7.1 followed the January 1, 2025 storm
on January 7, 2025 in the area of Xizang, China. Severe storms of this
type can trigger enhanced seismicity at the time of commencement (see previous
issue of this summary) or after ring currents re-develop up to a week after
the initiation of the storm. Strong earthquakes followed the January 1, 2025
storm in the next seven days in the South Sandwich Islands (M 6.1); Iquique, Chile (M 6.1)
Ethiopia (M 5.7); Guatemala M 6.2 and M 5.8 and Xizang M 7.1. A similar set
may occur following today's storm especially around April 20-24, 2025.
The strongest earthquake in the world today occurred as an M 5.6 in Minahasa, Indonesia. NEIC reported it was probably felt with intensity IV in the epicentral area.
This event occurred at the peak of a severe geomagnetic storm which reached
Kp levels greater than 8 about the time of this event according to NOAA.
It is located near the geomagnetic equator and was probably triggered by
geomagnetic fluctuations associated with the storm. The last earthquake in the
Minahasa area within about 200 km of this epicenter with M>=5.6 occurred
was an M 6.1 on February 25, 2025. At the time this summary noted:
"The strongest earthquake in the world today was an M 6.1 in the region of Sulawesi, Indonesia. NEIC reported it was felt with intensity III in Manado, Sulawesi, Indonesia.
It was followed by a strong series of aftershocks - many of which were lightly felt in the area." (February 25, 2025)
While most large earthquakes in this area are limited to magnitudes less than
M 6.2 an M 6.3 did occur on June 30, 2004. At the time this summary noted:
"The earthquake in Sulawesi of M 6.3 was reported by the Jakarta Post as being
felt in Manado and is the strongest in the region since an M 7.1 on Feb. 24, 2001 to the east of today's earthquake
and an M 7.6 on May 4, 2000 to the southwest. While no reports of damage
are currently available, this size earthquake may have done damage in the
epicentral area. The last event in the area which was similar to today's in magnitude occurred on Oct. 18, 2003 with M 6.3-6.44" (June 30, 2024)
The mainshock was preceded by several foreshocks and a strong series of moderate aftershocks.
Forecast 171343 had expected today's activity in Minahasa was likely within
about 100 km around April 16, 2025.
O: 17APR2025 00:51:25 00.4N 124.9E ML=5.6 EMSC Minahasa Sulawesi, Indonesia
P: 16APR2025 171343 01.0N 124.0E 4.0-5.5 AAAAA Mindanao, Philippines
An M 5.6 also occurred in the southern mid-Atlantic Ridge today. It was not
reported felt in this remote epicentral area. This event is located in the
South Atlantic magnetic anomaly zone and was likely triggered by effects
from the strong geomagnetic storms currently in progress.
The last earthquake within about 250 km of this event in the southern Mid-Atlantic
region occurred on June 14, 2024 with M 5.9. At the time this summary noted:
"The strongest earthquake in the world today was an M 5.9 in the southern Mid-Atlantic.
This event is located in the South Atlantic Geomagnetic Anomaly zone and follows
several unusual events in the area in recent months. When an M 6.0 hit this anomalous
area on December 15, 2023 this summary noted:
"A series of three moderate to large earthquakes occurred in the area of the South Atlantic today
in the general area of Tristan da Cunha. These events of M 6.0, 5.3 and 5.3
occurred in an area where tidal stresses with the new moon were strong and may have
been promoted from tidal stresses. They also occurred at a maximum of the
current geomagnetic storm (Kp was 6 at high latitudes at 20:00 UT today). This area is often considered the third geomagnetic
pole of the earth in an area called the "South Atlantic Anomaly" where the
geomagnetic field behaves in unusual ways. Planes and satellites experience
geomagnetic anomalies in this area and often must be routed around the area
to avoid complications from mal-functioning instruments and/or sudden changes
in orbital altitude due to geomagnetic field changes and accompanying
ionospheric density changes." (December 15, 2023)
The last earthquake of moderate or large magnitude in the area occurred as an M 4.9
on May 18, 2024. At the time this summary noted:
"Unusual seismicity also continued today near the South Atlantic geomagnetic anomaly.
An M 4.9 near the center of this anomaly occurred today in the southern Mid-Atlantic Ridge.
This is the strongest earthquake within about 300 km of this epicenter since
an M 5.0 on December 15, 2023. The last earthquake in this area with significantly
larger magnitude was an M 5.5 on March 3, 2023 about 200 km north of today's
epicenter. A similar event of M 5.3 occurred north of this on May 15, 2024" (May 17, 2024) and
This earthquake was closely associated with a strong M7.3 solar flare (#3480).
...
At M 5.9 the event in the southern Mid-Atlantic Ridge today is the strongest
event within about 300 km of this epicenter since an M 5.9 on March 22, 2011 -
the only such earthquake in this area in at least 35 years. At the time of
that event this summary noted:
"A strong earthquake in the South Atlantic Ocean followed the strong earthquakes
off Honshu today. This earthquake was M 6.1-6.4 and was followed by an aftershock
of M 5.1. It is the strongest earthquake in this region since an M 6.5
on February 16, 2005 and the fourth of M>6 in the area in the past 20 years.
This event is in a remote oceanic area and it is unlikely to have triggered
a tsunami or to have been felt in populated areas. The epicenter is in
the antipodal area to the great earthquakes in Japan and it is likely
to have been promoted by those events. Seismic energy is concentrated
by the spherical shape of the earth at the opposite point on the earth
to the epicenter of great quakes. It is not uncommon to see unusual activity
at the antipode due to this concentration of seismic energy." (March 22, 2011, June 14, 2024)
Today's event in the South Atlantic was also associated with a moderate C2.4 class solar flare.
Data on this flare from SWPC follow.
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7130 1223 1234 1239 C2.4 (April 16, 2025) 1.9E-03
Southern Mid-Atlantic M 5.6 12:41 UT
Forecast 171611 had expected elevated levels of seismicity in this area
in mid-April.
O: 16APR2025 12:41:02 32.5S 14.2W ML=5.6 EMSC Southern Mid-Atlantic Ridge
P: 11APR2025 171611 44.0S 16.0W 4.0-5.9 BDBAA So. Mid-Atlantic Ridge
A highly unusual earthquake of M 4.8 occurred today in the area of South Africa near Klerksdorp.
EMSC reported it was felt with moderate intensity in North West Province, South Africa at Klerksdorp, Matlosana, Johannesburg.
The last earthquake in South Africa within about 250 km of this epicenter
with M>=4.8 occurred on June 11, 2023 with M 5.0 but the last earthquake in the
area of significantly larger magnitude was an M 5.2 on April 3, 2017. At the time
this summary noted:
"A rare moderate earthquake of M 5.2 hit near Stilfontein, South Africa today.
NEIC reported it was felt with intensity VI in Kerksdorp, North West and IV in Potchefstroom, North West and III in Johannesburg, Gauteng, South Africa.
EMSC reported a loud earthquake noise which with the shaking woke many in Stilfontein, Kroonstad, Krugersdorp, Randburg, Germiston, Centurion, Pretoria, South Africa. This epicenter is in the antipodal area of the M 4.5 in Hawaii which occurred
on March 23. This report has previously linked seismicity in these two areas
due to their antipodal locations. The epicenter lies about 15 degrees south of
the geomagnetic equator and the current strong geomagnetic storm may have helped
promote this event. The last earthquake within about 200 km of this epicenter
in South Africa with M>=5.2 was an M 5.2-5.4 on August 5, 2014. The largest
earthquake in the region in the past 25 years was an M 5.7 on April 22, 1999. This
event also followed a moderately strong earthquake in Hawaii. The only other
such event in South Africa in the past 25 years was an M 5.2 on February 10, 1997." (April 3, 2017)
Forecast 171587 had expected today's event was likely within about 100 km
of this epicenter around April 19, 2025.
O: 17APR2025 08:57:30 26.9S 26.7E ML=4.8 EMSC South Africa
P: 19APR2025 171587 26.0S 28.0E 3.0-4.4 AAAAA Rep. South Africa
A pair of moderate earthquakes also occurred in the southern Kermadec Islands of New Zealand with M 5.4 and 5.3 today. NEIC reported likely intensity II in the epicentral area.
The strongest earthquake in the U.S. or Canada or vicinity today was an M 4.3
in the northern Gulf of California. It was not reported felt in this area.
Several earthquakes of similar magnitude also occurred south of this epicenter
in the Gulf of California today (see earthquake list below).
The last earthquake within about 100 km of this epicenter in the Gulf of California
with M>=4.3 was listed by NEIC as an M 4.3 and M 4.6 on July 16, 2023. At the
time this summary noted:
"A strong swarm of earthquakes also occurred today in Baja and the Gulf of
California, Mexico. The strongest earthquakes in this series occurred within
minutes of local solar noon with M 4.6 and 4.3 but the series began with smaller
event including an M 4.0 shortly after the M 7.2 in the Alaska Peninsula.
NEIC reported the earthquake of M 4.6 in the Gulf of California, Mexico was felt with intensity II-III in the area(s) of Sonora, Mexico in Puerto Penasco (VI) and Sonoita; in San Felipe, Baja California and in Arizona at Somerton (IV), Wellton, and Sells.
Several moderate earthquakes including an M 4.2 were also felt in Baja California today. These were felt lightly in Baja California at Tijuana.
This activity was probably triggered by strong tidal stresses with the
new moon of July 17." (July 16, 2023)
Today's earthquake in the Gulf of California occurred near local solar midnight
and may have been promoted by the current geomagnetic storms and/or strong
tidal stresses which maximize near this hour.
Forecast 171587 had expected today's event in the Gulf of California was
likely within about 50 km of the epicenter around April 16.
O: 16APR2025 07:00:48 30.8N 114.2W ML=4.3 EMSC Gulf of California
P: 16APR2025 171587 31.2N 114.5W 2.0-4.0 AAAAA SW U.S.A.
NEIC reported an earthquake of M 4.5 in Myanmar was felt with intensity up to II-III in the area(s) of Myanmar with V in Maymyo and IV in Mandalay. It was also reported lightly felt as far as Bangkok, Thailand.
EMSC reported it was felt lightly in Myanmar at Patheingyi, Mandalay, Pyinoolwin, and Thegon.
NEIC reported an earthquake of M 3.7 in Baja California was felt with intensity up to II-III in the area(s) of Baja California near Ensenada (IV) and in Southern California near San Diego (III-IV).
NEIC reported earthquakes of M 3.0 and M 3.2 off the coast of northern California was felt with intensity up to II-III in the area(s) of northern California at Myers Flat with intensity III.
NEIC reported an earthquake of M 2.9 in east-central California was felt with intensity up to II-III in the area(s) of east-central California with II in Markleeville.
EMSC reported an earthquake of M 4.4 in Sumbawa, Indonesia was felt with intensity up to IV in the area(s) of Sumbawa, Indonesia at Plampang.
TROPICAL CYCLONE ERROL (29S)
---- ------- ---------- -------- ----- ------ ------- ---------------
TC ERROL 2025-04-17 00:00 UT 15.2S 119.4E 130 kts North of Australia
Tropical Cyclone Errol (29S) continued today in the area north of Australia with winds up to 130 kts. The antipode of this epicenter is at 15N 60W. The antipode of this epicenter will encounter the Leeward and Windward Islands of the eastern Caribbean. Energy from this storm could enhance seismicity in that region around April 16-18, 2025 near (15N 60W) and later to the north near the Virgin Islands. These areas could experience seismic enhancement as TC Errol is antipodal. An earthquake today in Martinique at 15N 60W of M 4.0 was likely triggered by antipodal energy from TC Errol.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
7090 0418 0439 0504 C8.1 (April 16, 2025) 1.7E-02
Fiji M 4.2 04:31 UT
Mindanao M 4.0 05:02 UT
7130 1223 1234 1239 C2.4 (April 16, 2025) 1.9E-03
Southern Mid-Atlantic M 5.6 12:41 UT
7150 1504 1508 1513 C1.7 (April 16, 2025) 9.7E-04
Coast of No. California M 3.6 15:04 UT
7260 2341 2354 0006 C3.1 (April 16, 2025) 3.6E-03
Minahas M 5.6 00:51 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 18 minor storms 17 disturbed April 19. Solar M-flare chance: 60% X-class: 10% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 77 63 43 23:00 8 58 148
A severe geomagnetic storm began today about 16:00 UT (April 16). It reached
maximum Planetary Kp of 8 around 22:00-23:00 UT. The last geomagnetic storm
of greater disturbance occurred on January 1, 2025 with A-index (planetary)
of 86. Today's AP index reached 77. A major earthquake of M 7.1 followed this
storm on January 7, 2025 in the area of Xizang, China. Severe storms of this
type can trigger enhanced seismicity at the time of commencement (see previous
issue of this summary) or after ring currents re-develop up to a week after
the initiation of the storm. Strong earthquakes followed the January 1, 2025
storm in the next seven days in the South Sandwich Islands (M 6.1); Iquique, Chile (M 6.1)
Ethiopia (M 5.7); Guatemala M 6.2 and M 5.8 and Xizang M 7.1. A similar set
may occur following today's storm especially around April 20-24, 2025.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS) and
TC Errol (EDIS). Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 17 07 26 2025 -8.7 126.9 4.9 LOSPALOS TIMOR LESTE M43 T58 R132 Z50 B24 A10
04 17 06 32 2025 22.1 96.1 4.5 MANDALAY BURMA (MYANMAR) M0 T97 R92 Z92 B61 A44
04 17 04 34 2025 -11.2 115.8 5.2 NUSA DUA INDONESIA M38 T67 R131 Z55 B35 A5
04 17 03 56 2025 -19.0 -67.4 4.4 WSW OF CHALLAPATA BOLIVIA M164 T98 R77 Z98 B134 A144
04 17 01 14 2025 -17.2 -173.2 4.9 SSE OF HIHIFO TONGA M97 T3 R133 Z34 B36 A64
04 17 00 51 2025 0.4 124.8 5.6 ESE OF MODISI INDONESIA M35 T63 R123 Z59 B27 A17
04 16 23 55 2025 35.3 -117.9 2.2 CALIFORNIA CITY CA M114 T76 R60 Z106 B93 A125
04 16 23 53 2025 47.4 -117.9 2.4 NE OF SPRAGUE WASHINGTON M104 T84 R52 Z114 B94 A123
04 16 21 53 2025 41.2 -116.7 2.8 KM NE OF VALMY, NEVADA M110 T80 R55 Z111 B95 A126
04 16 21 51 2025 41.2 -116.7 2.3 KM NE OF VALMY, NEVADA M110 T80 R55 Z111 B95 A126
04 16 20 44 2025 32.2 -103.1 2.6 JAL NEW MEXICO M123 T85 R53 Z113 B106 A138
04 16 20 43 2025 44.3 -113.2 2.5 SSE OF LEADORE IDAHO M108 T84 R51 Z115 B97 A127
04 16 20 08 2025 -33.7 -179.1 4.7 THE KERMADEC ISLANDS M97 T14 R149 Z17 B38 A58
04 16 20 03 2025 35.2 -120.2 2.2 NE OF NIPOMO CA M113 T75 R61 Z105 B91 A124
04 16 19 21 2025 34.2 86.4 4.1 WESTERN XIZANG" M14 T108 R78 Z107 B73 A58
04 16 18 59 2025 32.1 -116.1 3.7 ENSENADA B.C. MX M118 T75 R61 Z105 B95 A127
04 16 18 57 2025 -0.7 127.5 4.6 SE OF LABUHA INDONESIA M38 T60 R125 Z56 B24 A17
04 16 18 14 2025 11.8 141.6 4.9 NNE OF FAIS MICRONESIA M44 T54 R115 Z62 B20 A35
04 16 17 44 2025 -33.9 -179.4 5.4 THE KERMADEC ISLANDS M97 T14 R150 Z16 B38 A57
04 16 17 35 2025 -33.8 -179.5 5.3 THE KERMADEC ISLANDS M97 T14 R149 Z16 B38 A57
04 16 17 07 2025 30.9 -103.0 1.6 FORT STOCKTON TEXAS M124 T84 R54 Z112 B106 A138
04 16 17 03 2025 40.4 -125.0 3.2 WNW OF PETROLIA CA M107 T75 R60 Z106 B88 A119
04 16 15 44 2025 40.4 -125.1 3.0 WNW OF PETROLIA CA M107 T75 R60 Z106 B88 A119
04 16 15 37 2025 53.9 -168.0 4.1 DUTCH HARBOR ALASKA M76 T74 R67 Z102 B68 A93
04 16 15 04 2025 40.4 -125.0 3.6 KM WNW OF PETROLIA M107 T75 R60 Z106 B88 A119
04 16 14 23 2025 48.8 -119.5 3.1 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93 A122
04 16 14 08 2025 46.6 -119.8 2.3 DESERT AIRE WASHINGTON M104 T82 R53 Z113 B93 A122
04 16 14 04 2025 48.7 -119.5 2.5 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93 A122
04 16 13 57 2025 39.2 -119.0 2.1 KM NNE OF YERINGTON M110 T78 R58 Z108 B93 A124
04 16 13 19 2025 19.2 -64.6 3.2 BAY U.S. VIRGIN ISLANDS M134 T113 R41 Z130 B142 A175
04 16 12 41 2025 -32.5 -14.2 5.6 SOUTHERN MID-ATLANTIC RIDGE" M117 T124 R86 Z101 B139 A114
04 16 11 13 2025 22.3 121.4 4.1 ENE OF HENGCHUN TAIWAN M23 T76 R101 Z79 B40 A38
04 16 11 07 2025 38.7 -119.8 2.9 W OF MARKLEEVILLE CA M110 T77 R59 Z107 B92 A124
04 16 09 45 2025 -24.7 -68.6 4.1 DE LA SIERRA ARGENTINA M165 T94 R83 Z93 B130 A138
04 16 07 56 2025 52.5 -174.0 3.0 ANDREANOF IS, ALASKA M72 T72 R70 Z100 B65 A89
04 16 07 30 2025 -18.7 -172.7 5.0 E OF NEIAFU TONGA M98 T1 R134 Z32 B36 A64
04 16 05 52 2025 19.6 -103.4 4.4 E OF ZAPOTILTIC MEXICO M134 T79 R63 Z104 B106 A139
04 16 05 22 2025 5.6 126.6 4.7 SSE OF PONDAGUITAN PHILIPPINES M33 T63 R119 Z62 B27 A22
04 16 04 47 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A137
04 16 04 31 2025 -19.4 -177.6 4.2 FIJI REGION" M93 T3 R137 Z30 B32 A60
04 16 04 15 2025 34.7 -85.3 2.2 WNW OF LINWOOD GEORGIA M123 T100 R41 Z126 B120 A151
04 16 03 49 2025 51.2 -178.4 5.2 SW OF ADAK ALASKA M70 T71 R72 Z98 B62 A86
04 16 02 44 2025 38.5 -8.0 2.9 SW OF ÉVORA PORTUGAL M86 T158 R21 Z170 B142 A128
04 16 02 25 2025 -48.0 99.8 5.2 SOUTHEAST INDIAN RIDGE" M69 T72 R149 Z43 B60 A35
04 16 01 42 2025 -47.8 99.8 6.6 SOUTHEAST INDIAN RIDGE" M69 T72 R149 Z43 B60 A35
04 16 01 39 2025 56.5 -148.9 3.3 ESE OF CHINIAK ALASKA M84 T79 R59 Z109 B78 A104
04 16 01 26 2025 37.6 16.1 4.7 PALIZZI MARINA ITALY M69 T160 R36 Z156 B128 A109
04 16 00 58 2025 31.9 -102.0 2.5 SSE OF MIDLAND TEXAS M123 T86 R53 Z113 B106 A139
04 16 00 29 2025 2.2 -96.5 4.5 THE GALAPAGOS ISLANDS M153 T78 R72 Z96 B111 A142
04 16 00 07 2025 31.7 -104.3 2.5 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105 A137
04 16 00 01 2025 52.2 -171.7 3.5 E OF ATKA ALASKA M74 T72 R70 Z100 B65 A90
April 16, 2025
A strong geomagnetic storm hit the earth late on UT April 15, 2025. The sudden
commencement of this storm was well documented by the magnetometer on GOES
satellites as beginning at 17:05 UT as a strong increast in geomagnetic field
strength. Other sudden changes in field strength subsequently occurred at 21:20 UT;
22:20 UT; 23:50 UT and 00:00 - 00:10 UT on April 16. Kp jumped to over 6 during
this period and there was a sudden and strong global earthquake series which also
was limited to this period. This swarm began with M 4.9 in the South Sandwich Islands
at 20:39 UT followed by a moderately strong quake in Mindanao, Philippines at
21:42 UT of M 5.6. An M 4.2 in Mangan India coincided with the geomagnetic
field spike at 22:20 UT with an M 4.7 in the Mid-Indian Ridge at 22:40 UT; an M 5.6
in Afghanistan at 23:13 UT and an M 5.0 in the Scotia Sea at 23:06 UT. The final
significant geomagnetic field spike was accompanied by an M 4.5 in the Galapagos Islands
and the strongest earthquake of the day - of M 6.6 - in the Southeast Indian Ridge.
All of these events appear to be related to the strong and sudden geomagnetic
storm. The strong earthquake series ceased as the storm wound down after 02:00 UT
on April 16.
The strongest earthquake of the day was an M 6.6 in the southeast Indian Ridge southwest of Australia.
It was not reported felt in this remote area and like most strong earthquakes
on Ocean Ridges was not expected to produce a notable tsunami and no tsunami
waves were reported. It was followed by an M 5.2 aftershock 43 minutes later.
This event is the strongest earthquake within about 300 km of this epicenter
on the Southeast Indian Ridge since an M 6.6 on June 13, 2002, the only such
event in this region in the past 35 years. At the time this summary noted:
"A strong earthquake occurred in the southeast Indian Ridge this
morning. This event has initial Ms 6.5 (NEIS). This is one of the
largest events ever recorded in this section of the SE Indian
Ridge" (June 13, 2002)
The epicenter in the Indian Ridge - at 99E longitude - was at local solar midnight
when the geomagnetic storm began at 17:10 UT and was likely promoted by geomagnetic effects.
Forecast 171608 had expected this area of the Indian Ocean region was likely
to see enhanced seismicity around April 19.
O: 16APR2025 01:42:59 47.8S 99.8E ML=6.6 EMSC Southeast Indian Ridge
P: 19APR2025 171608 46.0S 96.0E 4.0-5.5 BBBAA South Indian Ocean
An earthquake of M 5.6 was widely felt in the area of Afghanistan and Pakistan
shortly after the sudden commencement geomagnetic storm. NEIC reported it was
felt with intensity V in Pakistan in the North-west Frontier at Baffa, Kohat and Mardan and in Punjab at Dera Ghazi Khan, Sanjwal and with IV in Abottabad, Bat Khela, Cherat, Mingaora, Nowshera, Peshawar, and in Punjab at Lahore, Rawalpindi, Taxila, Wah, also in Tajikistan at Dushanbe and Qurgonteppa ad in Raipur, Uttatanchal. Lesser shaking was noted in Uzbekistan, Afghanistan, Jammu and Kashmir, India, and Tajikistan among others.
Also during the intial geomagnetic storm today an M 5.0 occurred in the
Scotia Sea south of South America. It was not reported felt in this remote
area but is an unsual event. An earthquake of M 5.3 hit this area on January 8, 2025.
and prior to that an M 5.5 on February 7, 2020. At the time this summary noted:
"The strongest earthquake in the world today was an M 5.5 in the Drake Passage south of South America.
This is the strongest earthquake in this remote area within about 400 km of this
epicenter since an M 5.6 on August 27, 2018 and prior to that an M 6.6 and 5.6 on January 15 and 17, 2012.
This may have been promoted by the current geomagnetic storm which, as noted, in
the previous issue of this summary could have enhanced seismicity in the region
of high latitudes" (February 7, 2020)
Near the beginning of the geomagnetic storm an M 5.6 occurred south of Mindanao,
Philippines. NEIC reported it was felt with intensity IV in Buayan, III in Alabel and II in Katnagawan, Southern Mindanao, Philippines.
The strongest earthquake in the U.S. or Canada today was an M 5.2 in the Andreanof Islands, Canada. NEIC expected intensity up to II in the epicentral area but this was not confirmed.
This epicenter is at the fifth node (72 degrees) from recent strong to major
earthquakes in Myanmar, Tonga and the Reykjanes Ridge, Atlantic and was likely
promoted by strong constructive interference of energy from these three epicenters.
This epicenter was at the peak of the geomagnetic storm at local solar noon
and was also probably promoted by energy from that storm.
An unusual earthquake also occurred today in the Ionian Sea south of Italy and east
of Sicily. NEIC reported it was felt with maximum intensity V in Sicily at Ramacca with IV in Avola, Trecastagni and Sant'Agata Li Battiati; in Mellieha and Santa Venera and Tarxien, Malta and in Campania, Italy at Eboil, Reggio de Calabria, Palizzi, and Motta San Giovanni. Lesser shaking was reported in Sicily, Southern Italy and Malta within about 300 km of the epicenter.
The last earthquake within about 150 km of today's epicenter with M>=4/7 was an
M 5.0 on December 26, 2018. At the time this summary noted:
"The major eruption of Mt. Etna in Sicily continued today. The largest associated earthquake
was an M 5.1 felt with intensity up to VII in Viagrande and VI in Catania Sicilien. Lesser shaking was felt throughout the area of Sicily especially at Aci Bonaccorsi and San Gregorio with intensity IV. Other areas
reporting moderate shaking of II-III included Aci Catena, Gravina di Catania, Tremestieri Etna, and Belpasso, Sicily.
Ligher earthquakes were also felt in Sicily today. This reported summarized this
activity in the previous issue as:
"A strong eruption of Mt. Etna in Sicily, Italy occurred today following a
series of moderate earthquakes in the area. No tsunami was reported or expected
but volcanic eruptions can cause local tsunamis. The eruption included lava
flows and steam and ash thrown high in the air. Strong eruptions at Etna
have occasionally be followed by unusual seismicity in Central California
in the next week. There were no reports or damage or casualties from today's
eruption or earthquakes. Etna is an active volcano but today's eruption was
especially vigorous. The strongest of the associated earthquakes was an M 4.3.
Earthquakes in this region are common but usually smaller than M 4.0. The last
event of M>=4.3 within about 150 km of this epicenter was an M 4.6 on October 6, 2018, the only
significantly larger event in the area since an M 4.6 on February 8, 2016.
NEIC reported today's earthquake of M 4.3 in Sicily,, Italy was felt with intensity II-III in the area(s) of Piedimonte Etnas, Ao Calera, and Catania, Italy.
Forecast 122048 had expected a moderate swarm in the region of Sicily was
likely around December 22. This epicenter is located at 102-103 degrees from the M 7.1
in the South Sandwich Islands of December 11 and was probably promoted by concentrated energy from that event.
After major earthquakes energy is reflected and refracted off the core-mantle boundary and
and reaches the surface in this distance range, often with a subsequent increase
in zonal seismicity at about 103 degrees." (December 25, 2018)
The last earthquake at a shallow focus in the region of Sicily occurred as an M 5.3
on October 25, 2012 and prior to that as an M 6.0 east of Sicily on September 6, 2002." (December 26, 2018)
NEIC reported an earthquake of M 4.4 in Jalisco, Mexico was felt with intensity up to II-III in the area(s) of Jalisco, Mexico in Tlalnepantla, and Coacalco, Mexico.
NEIC reported an earthquake of M 2.9 in Portugal was felt with intensity up to III in the area(s) of Portugal in Alentejo at Montemor-o-Novo and Evora.
EMSC reported moderate shaking in Portugal at Evora, Canaviais, Arraiolos, Escoural, Redondo, Pedrogao with loud rumbling sound.
NEIC reported an earthquake of M 2.5 in Western Texas was felt with intensity up to II-III in the area(s) of Western Texas at Midland.
NEIC reported an earthquake of M 4.2 in Nepal was felt with intensity up to II-III in the area(s) of Nepal at Mechinagar, Jhapa.
NEIC reported an earthquake of M 4.5 in Antofagasta, Chile was felt with intensity up to II-III in the area(s) of Antofagasta, Chile at Calama.
GeoNet reported this earthquake in North Island, New Zealand with the following parameters:
O: 15APR2025 19:20:15 38.9S 178.1E MS=4.4 GEONET 460 people reported feeling this earthquake with 215 at weak intensity and 224 with light shaking and 20 with moderate intensity 0 with strong, 0 with severe and 1 with extreme intensity.
TROPICAL CYCLONE ERROL (29S)
---- ------- ---------- -------- ----- ------ ------- ---------------
TC ERROL 2025-04-16 00:00 UT 14.7S 118.8E 150 kts North of Australia
Tropical Cyclone Errol (29S) continued today in the area north of Australia and south of the Banda Sea, Indonesia with winds up to 150 kts. The antipode of this epicenter is at 14N 61W. The antipode of this epicenter will encounter the Leeward and Windward Islands of the eastern Caribbean. Energy from this storm could enhance seismicity in that region around April 16-18, 2025 near (13N 60W).
TROPICAL CYCLONE TAM (30S)
---- ------- ---------- -------- ----- ------ ------- ---------------
TC TAM 2025-04-16 00:00 UT 23.1S 171.7E 065 kts Loyalty Islands
Tropical Cyclone Tam (30S) continued today in the area of the Loyalty Islands with winds up to 065 kts. It is likely to help promote seismicity in the region of southern Vanuatu and Loyalty Islands in the next several days. The antipode of this epicenter is at 23N 9W an aseismic region of north Africa. No seismic enchancement is expected in this region.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
6970 0135 0141 0146 C3.0 (April 15, 2025) 2.3E-03
Vanuatu M 4.801:36 UT
Guatemala M 4.2 01:38 UT
Iceland M 4.5 01:43 UT
6990 0919 0934 0942 C4.4 (April 15, 2025) 5.6E-03
Kuril Is. M 4.4 09:42 UT
7000 1004 1020 1028 M1.5 (April 15, 2025) 1.2E-02
Antofagasta M 4.5 10:29 UT
7020 1342 1347 1352 C3.2 (April 15, 2025) 2.1E-03
7040 1757 1813 1827 M1.3 (April 15, 2025) 1.9E-02
7050 2008 2020 2049 C3.1 (April 15, 2025) 7.2E-03
South Sandwich Is. M 4.9 20:39 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 18 minor storms 17 severe storms April 16. Solar M-flare chance: 80% X-class: 15% proton storm: 10%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 34 19 13 23:00 6 58 153
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 16 17 44 2025 -33.9 -179.4 5.4 THE KERMADEC ISLANDS M97 T14 R150 Z16 B38
04 16 17 35 2025 -33.8 -179.5 5.3 THE KERMADEC ISLANDS M97 T14 R149 Z16 B38
04 16 17 03 2025 40.4 -125.0 3.5 WNW OF PETROLIA CA M107 T75 R60 Z106 B88
04 16 15 44 2025 40.4 -125.1 3.0 WNW OF PETROLIA CA M107 T75 R60 Z106 B88
04 16 15 37 2025 53.9 -168.0 4.1 DUTCH HARBOR ALASKA M76 T74 R67 Z102 B68
04 16 15 04 2025 40.4 -125.0 3.8 WNW OF PETROLIA CA M107 T75 R60 Z106 B88
04 16 14 23 2025 48.8 -119.5 3.0 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 16 14 08 2025 46.6 -119.8 2.3 DESERT AIRE WASHINGTON M104 T82 R53 Z113 B93
04 16 13 57 2025 39.2 -119.0 2.1 KM NNE OF YERINGTON M110 T78 R58 Z108 B93
04 16 13 19 2025 19.2 -64.6 3.2 BAY U.S. VIRGIN ISLANDS M134 T113 R41 Z130 B142
04 16 12 41 2025 -32.5 -14.2 5.6 SOUTHERN MID-ATLANTIC RIDGE" M117 T124 R86 Z101 B139
04 16 11 13 2025 22.3 121.4 4.1 ENE OF HENGCHUN TAIWAN M23 T76 R101 Z79 B40
04 16 11 07 2025 38.7 -119.8 2.9 W OF MARKLEEVILLE CA M110 T77 R59 Z107 B92
04 16 09 45 2025 -24.7 -68.6 4.1 DE LA SIERRA ARGENTINA M165 T94 R83 Z93 B130
04 16 07 30 2025 -18.7 -172.7 5.0 E OF NEIAFU TONGA M98 T1 R134 Z32 B36
04 16 05 52 2025 19.6 -103.4 4.4 E OF ZAPOTILTIC MEXICO M134 T79 R63 Z104 B106
04 16 05 22 2025 5.6 126.6 4.7 SSE OF PONDAGUITAN PHILIPPINES M33 T63 R119 Z62 B27
04 16 04 47 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 16 04 31 2025 -19.4 -177.6 4.2 FIJI REGION" M93 T3 R137 Z30 B32
04 16 04 15 2025 34.7 -85.3 2.2 WNW OF LINWOOD GEORGIA M123 T100 R41 Z126 B120
04 16 03 49 2025 51.2 -178.4 5.2 SW OF ADAK ALASKA M70 T71 R72 Z98 B62
04 16 02 44 2025 38.5 -8.0 2.9 SW OF ÉVORA PORTUGAL M86 T158 R21 Z170 B142
04 16 02 25 2025 -48.0 99.8 5.2 SOUTHEAST INDIAN RIDGE" M69 T72 R149 Z43 B60
04 16 01 42 2025 -47.8 99.8 6.6 SOUTHEAST INDIAN RIDGE" M69 T72 R149 Z43 B60
04 16 01 39 2025 56.5 -148.9 3.3 ESE OF CHINIAK ALASKA M84 T79 R59 Z109 B78
04 16 01 26 2025 37.6 16.1 4.7 PALIZZI MARINA ITALY M69 T160 R36 Z156 B128
04 16 00 58 2025 31.9 -102.0 2.5 SSE OF MIDLAND TEXAS M123 T86 R53 Z113 B106
04 16 00 29 2025 2.2 -96.5 4.5 THE GALAPAGOS ISLANDS M153 T78 R72 Z96 B111
04 16 00 07 2025 31.7 -104.3 2.5 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 15 23 55 2025 46.6 -119.8 2.4 DESERT AIRE WASHINGTON M104 T82 R53 Z113 B93
04 15 23 13 2025 35.9 70.6 5.6 NNW OF PÄRÅ«N AFGHANISTAN M26 T121 R69 Z118 B86
04 15 23 06 2025 -59.9 -58.4 5.0 SCOTIA SEA" M138 T84 R114 Z67 B110
04 15 22 40 2025 -7.5 67.8 4.7 MID-INDIAN RIDGE" M40 T113 R101 Z90 B83
04 15 22 29 2025 19.2 -64.5 3.4 BAY U.S. VIRGIN ISLANDS M134 T114 R41 Z130 B142
04 15 22 20 2025 28.3 88.1 4.2 NNW OF MANGAN INDIA M9 T106 R84 Z102 B70
04 15 21 42 2025 5.8 124.2 5.6 SSW OF MAGULING PHILIPPINES M31 T66 R118 Z64 B29
04 15 21 24 2025 49.4 -120.5 2.1 S OF PRINCETON CANADA M101 T83 R52 Z114 B93
04 15 20 39 2025 -60.6 -26.5 4.9 SOUTH SANDWICH ISLANDS REGION" M124 T95 R113 Z72 B113
04 15 19 52 2025 35.3 -118.5 2.5 NNW OF TEHACHAPI CA M114 T76 R60 Z106 B93
04 15 19 42 2025 35.3 -118.5 2.6 NNW OF TEHACHAPI CA M114 T76 R60 Z106 B93
04 15 19 41 2025 -7.0 130.0 4.3 BANDA SEA" M44 T55 R132 Z50 B21
04 15 18 52 2025 -6.6 128.4 4.2 LOSPALOS TIMOR LESTE M42 T57 R131 Z51 B23
04 15 16 46 2025 32.4 -115.2 2.3 DELTA B.C. MX M118 T76 R60 Z105 B95
04 15 16 23 2025 40.6 -122.1 2.0 E OF MILLVILLE CA M108 T77 R59 Z107 B90
04 15 15 49 2025 -6.5 155.0 5.2 PANGUNA PAPUA NEW GUINEA M64 T33 R133 Z41 B3
04 15 15 07 2025 37.6 71.9 4.2 ENE OF KHORUGH TAJIKISTAN M25 T121 R68 Z118 B85
04 15 14 51 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 15 14 42 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 15 12 09 2025 35.3 -117.8 2.5 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 15 11 29 2025 39.2 -123.1 2.3 ENE OF TALMAGE CA M109 T75 R60 Z106 B90
04 15 11 22 2025 -16.8 -23.4 5.1 SOUTH ATLANTIC OCEAN" M122 T133 R69 Z116 B156
04 15 11 07 2025 53.7 -164.6 3.4 ESE OF AKUTAN ALASKA M77 T74 R66 Z103 B69
04 15 10 46 2025 18.9 -64.8 3.3 AMALIE U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142
04 15 10 29 2025 -22.4 -68.9 4.5 NE OF CALAMA CHILE M165 T95 R81 Z95 B131
04 15 09 42 2025 43.5 147.7 4.4 ESE OF SHIKOTAN RUSSIA M47 T72 R84 Z91 B49
04 15 06 47 2025 -21.1 -68.9 4.0 W OF OLLAGüE CHILE M165 T95 R80 Z96 B131
04 15 05 36 2025 32.1 -101.1 2.6 SSW OF WESTBROOK TEXAS M123 T86 R52 Z114 B107
04 15 05 30 2025 36.8 -90.6 2.4 SSW OF WILLIAMSVILLE MISSOURI M121 T96 R43 Z124 B115
04 15 04 05 2025 40.3 -124.3 2.2 W OF PETROLIA CA M107 T75 R60 Z106 B89
04 15 03 43 2025 33.1 -116.6 2.1 WSW OF JULIAN CA M117 T76 R61 Z105 B94
04 15 02 49 2025 52.0 -169.2 3.0 FOX ISLANDS, ALASKA M75 T72 R69 Z100 B66
04 15 02 46 2025 54.4 -158.7 3.3 SOUTHERN ALASKA M80 T75 R64 Z105 B72
04 15 02 26 2025 52.0 -169.3 3.9 FOX ISLANDS, ALASKA M75 T72 R69 Z100 B66
04 15 02 13 2025 39.1 -119.0 2.2 KM NE OF YERINGTON M111 T78 R58 Z108 B93
04 15 01 55 2025 48.8 -119.5 2.8 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 15 01 43 2025 64.6 -17.6 4.5 WNW OF HöFN ICELAND M79 T132 R14 Z161 B121
04 15 01 36 2025 -18.2 168.1 4.8 SSW OF PORT-VILA VANUATU M81 T17 R142 Z28 B20
04 15 01 27 2025 31.7 -104.4 2.6 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 15 01 08 2025 40.3 -125.0 2.4 W OF PETROLIA CA M107 T75 R60 Z106 B88
April 15, 2025
A moderate earthquake of M 5.2 shook much of southern California today. Readers
of this summary had been given a week's notice of the possibility of this
earthquake at this time in California or Nevada. Analysis of seismicity
following strong earthquakes in the Reykjanes Ridge of the North Atlantic
was published in this summary from April 4-7, 2025. This analysis is
reproduced below:
"There is some danger for the Pacific Plate-North American plate seismicity
following this earthqake in the Reykjanes Ridge. Following is a listing
in the Reykjanes area of M>=6.5 over the past century. The second reading
is for an earthquake in the California/Nevada area in the days following
the Reykjanes Ridge event.
12 11 12 57 7 1954 52.500 -32.000 0 6.5 0
12 16 11 7 11 1954 39.280 -118.120 0 7.3 0 Dixie Valley, Nevada
12 25 9 33 36 1956 48.750 -27.750 0 6.5 0
12 31 17 39 24 1956 38.283 -118.967 10 5.5 0 California-Nevada border
2 13 23 14 24 1967 52.761 -34.098 33 6.8 159
2 16 15 5 54 1967 37.422 -114.184 33 4.8 32 Caliente, Nevada
2 16 19 41 27 1967 32.150 -116.016 5 4.6 16 Southern California
2 17 8 12 56 1967 31.600 -116.240 10 4.6 12 Southern California
2 18 18 48 56 1967 34.183 -117.266 1 4.7 26 Eastern Los Angeles
10 16 5 45 11 1974 52.710 -32.000 41 7.3 355
11 3 8 26 10 1974 31.000 -115.200 33 4.7 0 Baja California
02 16 23 53 19 1998 52.718 -33.677 10 6.8 10
02 18 14 29 34 1998 31.915 -115.746 3 4.6 10 Baja California
02 13 18 59 12 2015 52.635 -31.884 16 7.1 10
02 14 02 28 56 2015 37.142 -117.262 17 4.8 10 Ridgecrest, California
As can be seen an earthquake of M>=4.5 have occurred in California or Nevada
in four of six occurrences of such an event in the Reykjanes Ridge with
several within 2-3 days (mostly at the sixth node (60 degrees) or the seventh node (52 degrees)
from the mainshocks in the Reykjanes area. These largest of these was the M 7.3 in December, 1954
in the Dixie Valley of Nevada which occurred 4-5 days after the North Atlantic
quake. The reason for this corresponding California activity may have to do
with the location of the North Atlantic events which lie near the Euler Pole
for North America and the Pacific Plates. This is the point around which the
North American plate appears to rotate with respect to the Pacific Plate.
A line perpendicular to local faults in California extended on a globe
will intersect other such lines at the Euler Pole. So energy emitted
at the Euler Pole will interact with faults in California as a pulse rather
than piece-meal. This simultaneity causes larger and more wide-spread
fault slippage especially in basin and range tectoniss as occur in
Nevada. With this in mind this summary is issuing a seismic watch for
the Pacific Plate-North American Plate and especially for vertical or strike-slip tectonics
regions for the next week extending from the Gulf of California to Washington
State with a moderate possibility of a moderate to strong quake in this time
period. A likely time for such event would be within a couple of days of the next full moon on April 13." (April 4, 6, 7, 2025)
Since this seismic watch was last published on April 7, 2025, today's event
of M 5.2 in southern California falls within the watch period at the expected
time of maximum danger for such and event as stated in the last line:
"A likely time for such event would be within a couple of days of the next full moon on April 13." (April 4, 6, 7, 2025)
When an M 5.5-5.9 hit the area of Papua New Guinea on April 10, 2025, this
summary elaborated on the possible impact on seismicity in Southern California
at this time and noted:
"The Los Angeles area of Southern California is located at 103 degrees from
this epicenter in New Guinea. Several light earthquake occurred in that area
today. Seismic energy is concentrated at this distance following major earthquakes
due to refraction and reflection off the core-mantle boundary to this
distance zone. Seismicity is often seen to increase at this distance following
major earthquakes. For example, the two great earthquake in this area of
Papua New Guinea in the past 50 years occurred on January 10, 1971 (M 8.1)
and on September 12, 1979 (M 8.0). These were followed by earthquakes in
San Fernando, Southern California on February 9, 1971 (M 6.7) and October 15, 1979
in Baja California (M 7.0) respectively. Both occurred about a month after
the major Papua earthquake and were both highly damaging." (May 6, 2013)
This Papua earthquake was followed by an upsurge in seismicity at 103-104 degrees from the epicenter
in Southern California which has included several events of M>=3. This is
expected to continue, however the moderate size of the PNG event is unlikely
to trigger moderate or strong events in southen California at this time." (April 11, 2025)
As expected this epicenter of M 5.2 in Southern California is at 104 degrees from New Guinea
and at the sixth node (60 degrees) from the Reykjanes Ridge event of M 6.9. Energy from these
sources probably helped trigger today's earthquake.
NEIC reported a foreshock of M 3.3-3.5 in Southern California was felt with intensity up to II-III in the area(s) of Southern California with IV at Del Mar; III in Alpine, La Mesa, Spring Valley, El Cajon, Julian, Lakeside, Poway, Ramona, Santee, Valley Center, San Diego and II in Los Angeles, Walnut, Jamul, La Mesa, Lemon Grove, Spring Valley, El Cajon, Escondido, Fallbrook, Pauma Valley, San Marcos, Santa Ysabel, Vista, Warner Springs, Ludlow and Murrieta.
This foreshock occurred near local solar noon on April 13, 2025 and was probably
showing the strong stresses had reached a breaking point.
This area of Southern California had seen increased seismicity in recent days as noted above. Foreshocks
within about 30 km of today's epicenter occurred on April 11 at 11:06 UT with M 2.2
and as a series of light events on April 10 within about 15 degrees of today's
epicenter near local solar noon with the largest of these at solar noon (19:39 UT on April 10).
These indicated elevated stresses which were being triggered by high tidal
stresses at local solar noon. More recently an M 1.7 occurred on April 12, 2025.
More than 40,000 residents of southern California reported to NEIC that they
had felt this earthquake. NEIC reported minor damage and intensity VI in California
at Ranchita, Santa Ysabel, with V at Alpine, Descanso, Pine Valley, Spring Valley, Borrego Springs, El Cajon, Escondido, Julian Lakeside, Pauma Valley, Ramona, Bonita, Chula Vista, IV in La Mesa, Carlsbad, and in general within about 150 km of the epicenter.
The largest immediate aftershock was an M 4.0. NEIC reported it was felt with intensity V in California at Rancho Santa Margarita; IV in Los Angeles, Seal Beach, Alpine, Chula Vista, Bonsall, El Cajon, Julian, La Jolla, Lakeside, Ramona, Warner Springs, San Diego, Pa;m Desert, Riverside, Hemet, Irvine Laguna Hills, Garden Grove, Los Angeles with lesser intensity within about 200 km of the epicenter.
The last earthquake within about 150 km of today's epicenter in Southern California
with M>=5.2 occurred on June 5, 2021 about 100 km to the east of today's
epicenter. The last of significantly larger magnitude in the area was an M 5.8 on June 15, 2010.
Other events in the region of M>5.2 in the past 35 years included an M 6.2 on April 23, 1992;
M 5.5 on August 26, 2012. Events of M5.2-5.3 hit the area on June 10, 2016; July 7, 2010;
June 12, 2005; October 31 2001 and June 29, 1992. At the time of the June, 2021
event this summary noted in part:
"Earthquakes in this area often occur in several day swarms and several
mainshocks often occur, so a second mainshock of M>=5 is possible in this
swarm. The last earthquake within about 150 km of today's epicenter with
M>=5.3 was an M 5.5 on August 26, 2012. An M 7.2 hit abotu 150 km southeast
of this epiceter on Easter Sunday April 4, 2010. Today's event, the
strongest in the regionin nearly nine years is a significant regional
earthquake." (June 5, 2021)
Forecasts 171465 and 171464 had bracketed this event within about 100 km
was likely around April 12-16. Other forecasts also identified strongly
enhanced seismicity in this area at this time.
O: 14APR2025 17:08:27 33.0N 116.6W ML=5.2 EMSC Southern California
P: 16APR2025 171465 32.9N 115.6W 2.5-4.6 AAAAA So. California
P: 12APR2025 171464 32.9N 117.6W 2.5-4.6 AAAAA So. California
The full moon arrived on April 13, 2025 at 00:22 UT. Longitudes which were at local solar midnight at this time are located at about 5 West while those at local solar noon are near 175 East. In the east these include most of western Europe and Iceland and the Atlantic Ridges while in the west areas of the western Aleutians, Kamchatka, Tonga/Fiji/Samoa and portions of New Zealand and Vanuatu are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are considered moderate to high in the next week (April 11-19, 2025).
An earthquake of M 4.8 occurred today in southern Vanuatu. It was not reported felt in this remote area.
It was likely triggered by the passage of Tropical Cyclone 30S over this epicenter
earlier in the day as noted in the previous issue of this summary:
"TC 30S 2025-04-14 00:00 UT 18.5S 169.0E 055 kts Southern Vanuatu
Tropical 30S continued today in the area of Southern and Central Vanuatu with winds up to 055 kts. It is likely to help promote seismicity in the region of southern Vanuatu and Loyalty Islands in the next several days. The antipode of this epicenter is at 19N 10W an aseismic region of north Africa. No seismic enchancement is expected in this region." (April 14, 2025)
An M 4.5 was reported today in central Island but not reported felt through NEIC.
This is not part of the volcanic eruption in southwestern Iceland which is still
proceeding to produce lava and tremors. But it may represent a further volcanic
zone to watch for enhanced seismicity. It occurred within minutes of local
solar midnight and may have been promoted by strong tidal stresses with
the full moon of April 13 which maximized near this longitude and time.
NEIC reported an earthquake of M 2.7 in Northeastern Washington State was felt with intensity up to II-III in the area(s) of Northeastern Washington State with III in Tonasket and II in Loomis, Oroville and in Osoyoos, British Columbia, Canada.
NEIC reported an earthquake of M 4.2 in Northern Chile was felt with intensity up to II-III in the area(s) of Northern Chile in Iquique, Tarapaca.
NEIC reported an earthquake of M 2.5 off northern California was felt with intensity up to II-III in the area(s) of northern California in Myers Flat (III) and Rio Dell (II).
NEIC reported an earthquake of M 3.0 in Central California was felt with intensity up to II-III in the area(s) of Central California with II at La Canada Flintridge, Tujunga, Northridge, Van Nuys.
EMSC reported an earthquake of M 2.8 in Spain was felt with intensity up to IV in the area(s) of Spain with a loud banging sound and sharp but short intensity in Torrevieja, Orihuela, Guardamar del Segura, Los Montesinos.
Many were wakened by the tremor in this tourist destination. It occurred within
minutes of local solar midnight and may have been promoted by tidal stresses
with the full moon of April 13 which maximize near this hour. A number of smaller
foreshocks and aftershocks were recorded by barely felt.
EMSC reported an earthquake of M 3.5 in Malay Peninsula, Thailand was felt with intensity up to IV in the area(s) of Malay Peninsula, Thailand at Pak Nam, Krabi Yai and Ao Nang, Krabi.
This is an unusual earthquake despite its light magnitude. The last earthquake
of M>=3.5 within about 150 km of this epicenter was an M 4.3 and M 3.9 on May 5 and 6, 2015.
At the time this summary noted:
"The most unusual earthquake of the day was widely felt in Thailand near Phuket.
While small and without reported damages or casualties, this event was widely
reported felt. The last earthquake of M>=4.3 in this region of Tailand near
Phlu Nai occurred as an M 4.5 on September 6, 2005, the only such event within
200 km of this epicenter of this size in the past 25 years. Forecast 88601 expected
regional activity southwest of this was likely in late April or early May.
EMSC reported this earthquake of M 4.3 in the Malay Peninsula, Thailand was felt with intensity II-III in the epicentral area.
NEIC reported intensity II-III in Thailand at Krabi, Phuket and Kathu." (May 6, 2015)
It occurred near local solar noon and may have been promoted by tidal stresses
associated with the full moon of April 13.
TROPICAL CYCLONE ERROL (29S)
---- ------- ---------- -------- ----- ------ ------- ---------------
TC ERROL 2025-04-15 00:00 UT 13.5S 120.3E 075 kts North of Australia
Tropical Cyclone Errol (29S) continued today in the area north of Australia and south of the Banda Sea, Indonesia with winds up to 065 kts. It is likely to help promote seismicity in the Banda Sea in the next several days. The antipode of this epicenter is at 12N 58W. The antipode of this epicenter will encounter the Leeward and Windward Islands and northern Venezuela of the eastern Caribbean. Energy from this storm could enhance seismicity in that region around April 14-16, 2025 near (13N 60W).
TROPICAL CYCLONE TAM (30S)
---- ------- ---------- -------- ----- ------ ------- ---------------
TC TAM 2025-04-15 00:00 UT 23.1S 171.7E 065 kts Loyalty Islands
Tropical Cyclone Tam (30S) continued today in the area of the Loyalty Islands with winds up to 065 kts. It is likely to help promote seismicity in the region of southern Vanuatu and Loyalty Islands in the next several days. The antipode of this epicenter is at 23N 9W an aseismic region of north Africa. No seismic enchancement is expected in this region.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
6790 0014 0020 0030 C6.4 (April 14, 2025) 1.2E-03
6820 0438 0449 0456 C5.0 (April 14, 2025) 5.0E-03
Myanmar M 4.1 04:37 UT
6840 0600 0605 0611 M1.4 (April 14, 2025) 8.8E-03
Taiwan M 4.4 05:58 UT
6850 0636 0650 0658 M4.2 (April 14, 2025) 1.7E-03
6860 0741 0748 0753 C3.9 (April 14, 2025) 2.8E-03
Souothern Californai M 2.7 07:45 UT
Northern California M 2.7 07:45 UT
6880 1220 1232 1241 C5.5 (April 14, 2025) 1.3E-03
6900 1443 1450 1459 C3.2 (April 14, 2025) 2.7E-03
Sakha, Russia M 4.0 14:40 UT
6910 1530 1540 1544 C4.9 (April 14, 2025) 3.0E-03
6920 1833 1842 1848 C6.2 (April 14, 2025) 4.1E-03
6940 1944 2000 2015 C6.8 (April 14, 2025) 1.2E-03
Myanmar M 3.8 19:46 UT
Java M 4.6 19:53 UT
Sumatra M 4.4 19:53 UT
Jalisco M 4.0 20:02 UT
6960 2232 2240 2245 C2.7 (April 14, 2025) 2.1E-03
Java M 4.4 22:43 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 15 and 17 major storms April 16. Solar M-flare chance: 80% X-class: 15% proton storm: 10%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 18 28 14 04:00 6 86 152
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 15 19 42 2025 35.3 -118.5 2.4 NNW OF TEHACHAPI CA M114 T76 R60 Z106 B93
04 15 18 52 2025 -6.6 128.4 4.2 LOSPALOS TIMOR LESTE M42 T57 R131 Z51 B23
04 15 16 46 2025 32.4 -115.2 2.4 DELTA B.C. MX M118 T76 R60 Z105 B95
04 15 16 23 2025 40.6 -122.1 2.0 E OF MILLVILLE CA M108 T77 R59 Z107 B90
04 15 15 49 2025 -6.5 155.0 5.2 PANGUNA PAPUA NEW GUINEA M64 T33 R133 Z41 B3
04 15 15 07 2025 37.6 71.9 4.2 ENE OF KHORUGH TAJIKISTAN M25 T121 R68 Z118 B85
04 15 14 51 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 15 14 42 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 15 12 09 2025 35.3 -117.8 2.5 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 15 11 29 2025 39.2 -123.1 2.3 ENE OF TALMAGE CA M109 T75 R60 Z106 B90
04 15 11 22 2025 -16.8 -23.4 5.1 SOUTH ATLANTIC OCEAN" M122 T133 R69 Z116 B156
04 15 10 46 2025 18.9 -64.8 3.3 AMALIE U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142
04 15 10 29 2025 -22.4 -68.9 4.5 NE OF CALAMA CHILE M165 T95 R81 Z95 B131
04 15 09 42 2025 43.5 147.7 4.4 ESE OF SHIKOTAN RUSSIA M47 T72 R84 Z91 B49
04 15 06 47 2025 -21.1 -68.9 4.0 W OF OLLAGüE CHILE M165 T95 R80 Z96 B131
04 15 05 36 2025 32.1 -101.1 2.6 SSW OF WESTBROOK TEXAS M123 T86 R52 Z114 B107
04 15 04 05 2025 40.3 -124.3 2.2 W OF PETROLIA CA M107 T75 R60 Z106 B89
04 15 03 43 2025 33.1 -116.6 2.1 WSW OF JULIAN CA M117 T76 R61 Z105 B94
04 15 02 26 2025 52.0 -169.3 3.9 FOX ISLANDS, ALASKA M75 T72 R69 Z100 B66
04 15 02 13 2025 39.1 -119.0 2.2 KM NE OF YERINGTON M111 T78 R58 Z108 B93
04 15 01 55 2025 48.8 -119.5 2.7 ESE OF LOOMIS WASHINGTON M102 T84 R52 Z114 B93
04 15 01 43 2025 64.6 -17.6 4.5 WNW OF HöFN ICELAND M79 T132 R14 Z161 B121
04 15 01 36 2025 -18.2 168.1 4.8 SSW OF PORT-VILA VANUATU M81 T17 R142 Z28 B20
04 15 01 27 2025 31.7 -104.4 2.6 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 15 01 08 2025 40.3 -125.0 2.4 W OF PETROLIA CA M107 T75 R60 Z106 B88
04 14 23 10 2025 34.3 -116.9 2.2 BIG BEAR LAKE CA M115 T76 R60 Z106 B94
04 14 23 07 2025 29.8 139.0 4.0 IZU ISLANDS JAPAN REGION" M39 T67 R97 Z79 B37
04 14 22 56 2025 34.3 -116.9 2.3 BIG BEAR LAKE CA M115 T76 R60 Z106 B94
04 14 22 44 2025 -8.2 107.1 4.4 SSW OF BANJAR INDONESIA M31 T76 R124 Z62 B44
04 14 22 17 2025 43.1 146.1 4.6 ESE OF NEMURO JAPAN M46 T73 R84 Z91 B49
04 14 22 04 2025 -20.3 -69.1 4.2 LA TIRANA CHILE M165 T96 R79 Z96 B132
04 14 21 05 2025 34.5 -119.0 2.3 NNW OF FILLMORE CA M114 T75 R61 Z105 B92
04 14 20 44 2025 43.4 -71.2 2.0 ALTON NEW HAMPSHIRE M113 T112 R27 Z140 B127
04 14 20 23 2025 33.0 -116.6 2.9 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 20 11 2025 67.1 -143.5 3.1 NORTHERN ALASKA M80 T90 R49 Z119 B85
04 14 19 53 2025 -5.6 109.9 4.6 NW OF BATANG INDONESIA M30 T75 R123 Z63 B41
04 14 19 34 2025 33.0 -116.6 2.6 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 19 06 2025 36.0 -120.6 2.0 NNW OF PARKFIELD CA M112 T75 R61 Z105 B91
04 14 19 01 2025 44.5 -115.2 2.2 NNW OF STANLEY IDAHO M107 T83 R52 Z114 B96
04 14 18 55 2025 33.1 -116.6 2.1 SSW OF JULIAN CA M117 T76 R61 Z105 B94
04 14 18 27 2025 33.0 -116.6 2.1 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 18 25 2025 33.1 -116.6 2.1 SE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 18 23 2025 33.0 -116.6 4.0 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 25 2025 33.0 -116.6 2.1 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 14 2025 33.0 -116.6 2.6 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 13 2025 33.0 -116.6 3.0 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 12 2025 33.2 -116.3 3.5 BORREGO SPRINGS CA M117 T76 R61 Z105 B94
04 14 17 12 2025 33.0 -116.6 2.6 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 11 2025 33.0 -116.6 2.4 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 11 2025 33.0 -116.6 2.1 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 10 2025 33.1 -116.6 2.8 SW OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 10 2025 33.1 -116.6 2.8 SSW OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 10 2025 33.1 -116.6 2.5 WSW OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 10 2025 33.0 -116.6 2.5 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 10 2025 33.0 -116.6 2.4 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 10 2025 33.0 -116.6 2.3 SSE OF JULIAN CA M117 T76 R61 Z105 B94
04 14 17 08 2025 33.0 -116.6 5.2 KM S OF JULIAN M117 T76 R61 Z105 B94
04 14 16 24 2025 18.6 -69.0 3.9 GUAYMATE DOMINICAN REPUBLIC M137 T109 R44 Z127 B138
04 14 10 04 2025 52.1 -178.8 3.2 W OF ADAK ALASKA M70 T72 R71 Z99 B63
04 14 09 18 2025 -56.0 -121.4 4.9 SOUTHERN EAST PACIFIC RISE" M136 T52 R130 Z44 B83
04 14 09 11 2025 -27.1 -69.7 4.2 ENE OF COPIAPó CHILE M165 T92 R85 Z90 B128
04 14 08 43 2025 49.0 -119.5 2.5 NW OF OSOYOOS CANADA M102 T84 R51 Z115 B93
04 14 08 03 2025 40.4 -124.9 2.5 WNW OF PETROLIA CA M107 T75 R60 Z106 B88
04 14 07 53 2025 35.3 -117.8 3.0 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 14 07 45 2025 40.3 -126.4 2.7 W OF FERNDALE CALIFORNIA M106 T74 R61 Z105 B87
04 14 07 07 2025 31.5 -104.1 2.1 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 14 04 43 2025 31.7 -104.2 2.2 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 14 04 05 2025 -40.1 174.4 4.2 PATEA NEW ZEALAND M95 T22 R157 Z8 B39
04 14 04 05 2025 -6.1 150.1 4.6 KIMBE PAPUA NEW GUINEA M59 T37 R133 Z42 B1
04 14 03 06 2025 33.0 -116.6 2.0 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 02 54 2025 40.4 -126.1 2.7 W OF FERNDALE CALIFORNIA M106 T74 R61 Z105 B87
04 14 02 28 2025 31.7 -104.5 2.4 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104
04 14 02 26 2025 36.3 -120.9 2.1 NEW IDRIA CA M112 T75 R61 Z105 B91
04 14 01 33 2025 0.5 126.1 5.3 WSW OF TERNATE INDONESIA M36 T62 R123 Z58 B26
04 14 01 28 2025 51.4 179.9 3.1 ANDREANOF IS. ALASKA M69 T71 R72 Z98 B62
04 14 00 54 2025 40.6 140.4 4.4 WNW OF HIROSAKI JAPAN M41 T73 R86 Z89 B47
04 14 00 44 2025 38.9 70.4 4.3 S OF RASHT TAJIKISTAN M27 T122 R66 Z120 B86
04 14 00 42 2025 -7.1 129.7 4.6 KEPULAUAN BABAR INDONESIA" M43 T56 R132 Z50 B21
04 14 00 16 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
April 14, 2025
A moderate earthquake of M 5.2 shook much of southern California today. Readers
of this summary had been given a week's notice of the possibility of this
earthquake at this time in California or Nevada. Analysis of seismicity
following strong earthquakes in the Reykjanes Ridge of the North Atlantic
was published in this summary from April 4-7, 2025. This analysis is
reproduced below:
"There is some danger for the Pacific Plate-North American plate seismicity
following this earthqake in the Reykjanes Ridge. Following is a listing
in the Reykjanes area of M>=6.5 over the past century. The second reading
is for an earthquake in the California/Nevada area in the days following
the Reykjanes Ridge event.
12 11 12 57 7 1954 52.500 -32.000 0 6.5 0
12 16 11 7 11 1954 39.280 -118.120 0 7.3 0 Dixie Valley, Nevada
12 25 9 33 36 1956 48.750 -27.750 0 6.5 0
12 31 17 39 24 1956 38.283 -118.967 10 5.5 0 California-Nevada border
2 13 23 14 24 1967 52.761 -34.098 33 6.8 159
2 16 15 5 54 1967 37.422 -114.184 33 4.8 32 Caliente, Nevada
2 16 19 41 27 1967 32.150 -116.016 5 4.6 16 Southern California
2 17 8 12 56 1967 31.600 -116.240 10 4.6 12 Southern California
2 18 18 48 56 1967 34.183 -117.266 1 4.7 26 Eastern Los Angeles
10 16 5 45 11 1974 52.710 -32.000 41 7.3 355
11 3 8 26 10 1974 31.000 -115.200 33 4.7 0 Baja California
02 16 23 53 19 1998 52.718 -33.677 10 6.8 10
02 18 14 29 34 1998 31.915 -115.746 3 4.6 10 Baja California
02 13 18 59 12 2015 52.635 -31.884 16 7.1 10
02 14 02 28 56 2015 37.142 -117.262 17 4.8 10 Ridgecrest, California
As can be seen an earthquake of M>=4.5 have occurred in California or Nevada
in four of six occurrences of such an event in the Reykjanes Ridge with
several within 2-3 days (mostly at the sixth node (60 degrees) or the seventh node (52 degrees)
from the mainshocks in the Reykjanes area. These largest of these was the M 7.3 in December, 1954
in the Dixie Valley of Nevada which occurred 4-5 days after the North Atlantic
quake. The reason for this corresponding California activity may have to do
with the location of the North Atlantic events which lie near the Euler Pole
for North America and the Pacific Plates. This is the point around which the
North American plate appears to rotate with respect to the Pacific Plate.
A line perpendicular to local faults in California extended on a globe
will intersect other such lines at the Euler Pole. So energy emitted
at the Euler Pole will interact with faults in California as a pulse rather
than piece-meal. This simultaneity causes larger and more wide-spread
fault slippage especially in basin and range tectoniss as occur in
Nevada. With this in mind this summary is issuing a seismic watch for
the Pacific Plate-North American Plate and especially for vertical or strike-slip tectonics
regions for the next week extending from the Gulf of California to Washington
State with a moderate possibility of a moderate to strong quake in this time
period. A likely time for such event would be within a couple of days of the next full moon on April 13." (April 4, 6, 7, 2025)
Since this seismic watch was last published on April 7, 2025, today's event
of M 5.2 in southern California falls within the watch period at the expected
time of maximum danger for such and event as stated in the last line:
"A likely time for such event would be within a couple of days of the next full moon on April 13." (April 4, 6, 7, 2025)
When an M 5.5-5.9 hit the area of Papua New Guinea on April 10, 2025, this
summary elaborated on the possible impact on seismicity in Southern California
at this time and noted:
"The Los Angeles area of Southern California is located at 103 degrees from
this epicenter in New Guinea. Several light earthquake occurred in that area
today. Seismic energy is concentrated at this distance following major earthquakes
due to refraction and reflection off the core-mantle boundary to this
distance zone. Seismicity is often seen to increase at this distance following
major earthquakes. For example, the two great earthquake in this area of
Papua New Guinea in the past 50 years occurred on January 10, 1971 (M 8.1)
and on September 12, 1979 (M 8.0). These were followed by earthquakes in
San Fernando, Southern California on February 9, 1971 (M 6.7) and October 15, 1979
in Baja California (M 7.0) respectively. Both occurred about a month after
the major Papua earthquake and were both highly damaging." (May 6, 2013)
This earthquake was followed by an upsurge in seismicity at 103-104 degrees from the epicenter
in Southern California which has included several events of M>=3. This is
expected to continue, however the moderate size of the PNG event is unlikely
to trigger moderate or strong events in southen California at this time." (April 11, 2025)
As expected this epicenter in Southern California is at 104 degrees from New Guinea
and at the sixth node from the Reykjanes Ridge event of M 6.9. Energy from these
sources probably helped trigger today's earthquake.
NEIC reported a foreshock of M 3.3-3.5 in Southern California was felt with intensity up to II-III in the area(s) of Southern California with IV at Del Mar; III in Alpine, La Mesa, Spring Valley, El Cajon, Julian, Lakeside, Poway, Ramona, Santee, Valley Center, San Diego and II in Los Angeles, Walnut, Jamul, La Mesa, Lemon Grove, Spring Valley, El Cajon, Escondido, Fallbrook, Pauma Valley, San Marcos, Santa Ysabel, Vista, Warner Springs, Ludlow and Murrieta.
This foreshock occurred near local solar noon on April 13, 2025 and was probably
showing the strong stresses had reached a breaking point.
This area of Southern California had seen increased seismicity in recent days as noted above. Foreshocks
within about 30 km of today's epicenter occurred on April 11 at 11:06 UT with M 2.2
and as a series of light events on April 10 within about 15 degrees of today's
epicenter near local solar noon with the largest of these at solar noon (19:39 UT on April 10).
These indicated elevated stresses which were being triggered by high tidal
stresses at local solar noon. More recently an M 1.7 occurred on April 12, 2025.
More than 40,000 residents of southern California reported to NEIC that they
had felt this earthquake. NEIC reported minor damage and intensity VI in California
at Ranchita, Santa Ysabel, with V at Alpine, Descanso, Pine Valley, Spring Valley, Borrego Springs, El Cajon, Escondido, Julian Lakeside, Pauma Valley, Ramona, Bonita, Chula Vista, IV in La Mesa, Carlsbad, and in general within about 150 km of the epicenter.
The last earthquake within about 150 km of today's epicenter in Southern California
with M>=5.2 occurred on June 5, 2021 about 100 km to the east of today's
epicenter. The last of significantly larger magnitude in the area was an M 5.8 on June 15, 2010.
Other events in the region of M>5.2 in the past 35 years included an M 6.2 on April 23, 1992;
M 5.5 on August 26, 2012. Events of M5.2-5.3 hit the area on June 10, 2016; July 7, 2010;
June 12, 2005; October 31 2001 and June 29, 1992. At the time of the June, 2021
event this summary noted in part:
"Earthquakes in this area often occur in several day swarms and several
mainshocks often occur, so a second mainshock of M>=5 is possible in this
swarm. The last earthquake within about 150 km of today's epicenter with
M>=5.3 was an M 5.5 on August 26, 2012. An M 7.2 hit abotu 150 km southeast
of this epiceter on Easter Sunday April 4, 2010. Today's event, the
strongest in the regionin nearly nine years is a significant regional
earthquake." June 5, 2021)
Forecasts 171465 and 171464 had bracketed this event within about 100 km
was likely around April 12-16. Other forecasts also identified strongly
enhanced seismicity in this area at this time.
O: 14APR2025 17:08:27 33.0N 116.6W ML=5.2 EMSC Southern California
P: 16APR2025 171465 32.9N 115.6W 2.5-4.6 AAAAA So. California
P: 12APR2025 171464 32.9N 117.6W 2.5-4.6 AAAAA So. California
The full moon arrived on April 13, 2025 at 00:22 UT. Longitudes which were at local solar midnight at this time are located at about 5 West while those at local solar noon are near 175 East. In the east these include most of western Europe and Iceland and the Atlantic Ridges while in the west areas of the western Aleutians, Kamchatka, Tonga/Fiji/Samoa and portions of New Zealand and Vanuatu are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are considered moderate to high in the next week (April 11-19, 2025).
The largest earthquake in the world today was an M 6.5 at an intermediate focal depth under the area south of the Fiji Islands. NEIC reported it may have been felt with intensity up to III but no specific reports were available.
No Tsunami was expected nor observed. This is the strongest earthquake within
about 200 km of this epicenter since an M 7.0 on February 18, 2009 and priot to that a major
earthquake of M 7.7 on December 9, 2007. At the time this summary noted:
"A strong earthquake of M 6.9-7.4 hit the region of the northern Kermadec
Islands today. This event was reported by GeoNet to have been felt as
far south as Wellington, N.Z. more than 1500 km to the southwest of the
epicenter. No tsunami was expected and because of the remote nature of this
epicenter no other felt effects, injuries or casualties are expected with
this earthquake. This is the largest earthquake to hit the northern Kermadec
region (26-29S 174-180W) since an M 7.0 on September 1997. The area has
been active over the past month with events of M 6.4 a month ago on Jan. 18
and an M 6.0 on Jan. 24. The area reactivated earlier this week with a further
M 6.1 and M 5.4 on Feb. 12 and an M 6.0 on Feb. 17. At the time of the M 6.1
which immediately followed the Talaud M 7.4 earthquake we emphasized the possible
relation between these events as follows and this continues to apply to the event today.
"A strong earthquake of M 6.1 occurred in the Kermadec Islands of New Zealand and
was followed by an M 5.4 early on Feb. 13. This is a remote area and these
events were not expected to have been felt in the region. The maximum shaking
at long distances is expected at distances of m*360/n degrees (where n and m are small integers)
from the mainshock. These events in the Kermadec Islands occurred 60-61 degrees
from the Talaud Islands and some triggering may have been involved." (February 13, 2009, February 19, 2009)
This epicenter appears to be related to the full moon today as it occurred
at the longitude of maximum stress with this alignment (see above). It may
be the final strong triggered event in the series within hours of the full
moon as discussed in the previous issue of this report.
This epicenter is at 143 degrees from the M 6.9 in the Reykjanes Ridge of April 3 and at
the tenth node (36 degrees) from the M 6.9 in New Britain of April 4 and
may have been promoted by energy from those sources.
Forecast 171594 (among others) had expected this event within about 100 km
of this epicenter was likely around April 15.
O: 13APR2025 20:02:22 26.0S 178.3W ML=6.5 NEIC South of the Fiji Islands
P: 15APR2025 171594 25.0S 179.0W 4.0-5.4 AAAAA Tonga Islands
An analysis of expected seismicity following the solar eclipse of March 29, 2025
was published in this summary on March 23, 2025 as follows. With today's event
in Fiji each of the areas listed as high probability seismic areas
at this time have now occurred with a strong earthquake. That analysis follows:
"A similar eclipse occurred with the new moon of October 25, 2022. That eclipse
was accompanied by an M 6.4 in Luzon, Philippines and an 6.3 in the South Sandwich Islands on October 25, 2022.
The South Sandwich Islands are currently active and could see additional
seismic enhancement with the eclipse of March 29, 2025.
Other activity of M>=6 following the eclipse of October 25, 2022 occurred
as listed below. Much of this activity occurred near the international Date
Line in the Southwest Pacific area and included a series of three earthquakes
of M>=7 in that region about two weeks following the eclipse with the next
full moon starting on November 9, 2022. This activity (like the current
situation) is near local solar noon in Tonga and Fiji and was likely
promoted by this new moon and eclipse. Similar activity in the Tonga/Fiji/New
Zealand area could be expected in late March to early April, 2025 perhaps
with the next full moon.
The most unusual earthquake following the eclipse of October 25, 2022
was an M 6.0 in the North Pacific Ocean - an unprecedented event even
to this date. At the time this summary noted in this regard:
"The strongest earthquake in the world today was an M 6.0 in the North Pacific Ocean about 1250 km west of San Diego and Los Angeles, California. NEIC reported it was felt lightly in California throughout the coast in areas from San Francisco to Washington State to southern California.
This is an unprecedented earthquake in the middle of the North Pacific.
There is no reason to expect earthquakes such as this in this region of the Pacific
as no tectonics would support this. It is possible this was a meteor impact
in the ocean, but this cannot be confirmed. If this is a tectonic earthquake
it could indicate regional stress is high and could indicate a strong earthquake
along the coast of California could be nearer than previously thought. A strong
earthquake of M 7.5 hit off the coast of Baja California, Mexico a week before the
M 8.3 in San Francisco, California in April 1906. This is concerning as there
was an M 5.1 in San Francisco on October 25, 2022.
Today's earthquake is the strongest ever recorded within about 500-1000 km of this
epicenter in the North Pacific and as such is very significant. The felt area
along the west coast of North America is also unusual." (November 2, 2022)
One area not noted with the eclipse of October, 2022 was the area where the maximum
eclipse is due with the current alignment - the area of the Greenland Sea and
eastern Canada. The Greenland Sea saw an M 7.1 on March 10, 2025 - the last major
earthquake in the world. A moderate aftershock or furthern volcanism is
likely in this area with the coming new moon and partial solar eclipse.
Table 1: List of earthquakes of M>=6 following new moon and partial solar eclipse of October 25, 2022.
MO DA HR MN SC YEAR LAT N+S- LON E+W- DEP MAG GEOGRAPHIC LOCATION
10 25 0 13 1 2022 -58.756 -26.192 78.0 6.3 South Sandwich Islands
10 25 14 59 3 2022 17.662 120.823 27.3 6.4 Luzon, Philippines
11 2 4 53 13 2022 31.510 -133.351 10.0 6.0 North Pacific
11 2 14 17 51 2022 -60.796 -25.733 10.0 6.1 South Sandwich Islands
11 4 10 2 46 2022 28.175 -112.303 10.0 6.1 Gulf of California
11 9 9 38 42 2022 -25.968 178.363 628.9 6.8 Fiji
11 9 9 51 4 2022 -26.044 178.381 665.3 7.0 Fiji
11 9 10 14 33 2022 -25.595 178.278 623.6 6.6 Fiji
11 9 10 14 33 2022 -25.637 178.419 622.7 6.5 Fiji
11 11 10 48 45 2022 -19.318 -172.100 24.8 7.3 Tonga
11 12 7 9 14 2022 -20.116 -178.363 587.2 7.0 Tonga
" (March 23, 2025)
Table 2: Corresponding earthquakes following the Solar Eclipse of March 19, 2025
4 5 11 29 11 2025 -57.325 -25.615 21.6 5.5 South Sandwich Islands
4 5 11 29 14 2025 -57.320 -25.591 51.0 5.4 South Sandwich Islands
4 5 11 32 9 2025 -57.272 -25.572 27.7 5.6 South Sandwich Islands
3 30 12 18 47 2025 -20.329 -173.907 29.0 7.0 Tonga
3 30 15 4 54 2025 -20.430 -173.866 17.0 6.2 Tonga
3 30 15 33 48 2025 -20.306 -173.715 35.0 5.8 Tonga
4 13 20 02 22 2025 -26.000 -178.300 35.0 6.5 Fiji
4 12 3 47 9 2025 -4.691 153.154 62.0 6.1 New Britain
4 2 0 29 22 2025 -56.929 -142.207 10.0 6.3 South Pacific
4 2 14 3 57 2025 31.002 131.473 26.0 6.2 Kyushu, Japan
4 2 21 3 39 2025 2.117 126.759 36.7 5.9 Molucca Sea
4 3 14 9 29 2025 52.460 -32.111 10.0 6.9 Reykjanes Ridge
4 4 8 1 6 2025 -15.512 -174.542 192.0 5.7 Tonga
4 4 20 4 38 2025 -6.205 151.764 10.0 6.9 New Britain
4 7 2 59 30 2025 49.394 155.459 51.3 5.4 Kuril Islands
4 13 9 13 32 2025 48.752 149.762 372.3 5.9 Kuril Islands
4 7 19 49 20 2025 2.031 96.750 18.0 5.8 Sumatra
4 10 2 43 28 2025 -6.264 151.417 10.0 5.4 New Ireland
4 10 7 53 23 2025 -5.938 138.667 35.0 5.5 Papua New Guinea
4 12 3 47 9 2025 -4.691 153.154 62.0 6.1 New Britain
NEIC reported an earthquake of M 4.1 in Kodiak Alaska was felt with intensity up to II-III in the area(s) of Kodiak Alaska and Homer, AK.
NEIC reported an earthquake of M 3.5 in Southern California was felt with intensity up to II-III in the area(s) of Southern California with IV at Del Mar; III in Alpine, La Mesa, Spring Valley, El Cajon, Julian, Lakeside, Poway, Ramona, Santee, Valley Center, San Diego and II in Los Angeles, Walnut, Jamul, La Mesa, Lemon Grove, Spring Valley, El Cajon, Escondido, Fallbrook, Pauma Valley, San Marcos, Santa Ysabel, Vista, Warner Springs, Ludlow and Murrieta.
NEIC reported an earthquake of M 2.9 in Central California was felt with intensity up to II-III in the area(s) of Central California in Salinas.
NEIC reported an earthquake of M 5.0 in Costa Rica was felt with intensity up to II-III in the area(s) of Costa Rica in Guanacaste at Belen, Santa Cruz, Sardinal with III and II in Samara.
NEIC reported earthquakes of M 2.5 and M 3.2 in Eastern Washington State were felt with intensity up to II-III in the area(s) of Eastern Washington State in Tonasket.
NEIC reported an earthquake of M 4.4 in Central Turkey was felt with intensity up to II-III in the area(s) of Central Turkey at Samsun.
NEIC reported an earthquake of M 4.7 in Tajikistan was felt with intensity up to II-III in the area(s) of Tajikistan in Qurgonteppa Khatlon.
NEIC reported an earthquake of M 3.0 in Southern Alaska was felt with intensity up to II-III in the area(s) of Southern Alaska at Homer.
NEIC reported an earthquake of M in was felt with intensity up to II-III in the area(s) of
NEIC reported an earthquake of M in was felt with intensity up to II-III in the area(s) of
NEIC reported an earthquake of M in was felt with intensity up to II-III in the area(s) of
NEIC reported an earthquake of M in was felt with intensity up to II-III in the area(s) of
GeoNet reported an earthquake of M 4.2 in North Island, New Zealand with the following parameters today:
O: 14APR2025 04:05:15 40.1S 174.4E MB=4.2 GEONET Felt with moderate to strong intensity in the area of French Pass, New Zealand and in southern North Island and northern South Island. 582 reports of felt events were made of which 418 reported weak and 157 light intensity with 7 reports of moderate shaking and 0 with strong and 0 severe and 0 with extreme intensity came from the area.
EMSC reported an earthquake of M in was felt with intensity up to IV in the area(s) of
EMSC reported an earthquake of M in was felt with intensity up to IV in the area(s) of
EMSC reported an earthquake of M in was felt with intensity up to IV in the area(s) of
EMSC reported an earthquake of M in was felt with intensity up to IV in the area(s) of
EMSC reported an earthquake of M in was felt with intensity up to IV in the area(s) of
TROPICAL CYCLONE 29S
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 29S 2025-04-14 00:00 UT 12.2S 121.8E 065 kts North of Australia
Tropical 29S continued today in the area north of Australia and south of the Banda Sea, Indonesia with winds up to 065 kts. It is likely to help promote seismicity in the Banda Sea in the next several days. The antipode of this epicenter is at 12N 58W. The antipode of this epicenter will encounter the Leeward and Windward Islands and northern Venezuela of the eastern Caribbean. Energy from this storm could enhance seismicity in that region around April 14-16, 2025 near (12N 60W).
TROPICAL CYCLONE 30S
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 30S 2025-04-14 00:00 UT 18.5S 169.0E 055 kts Southern Vanuatu
Tropical 30S continued today in the area of Southern and Central Vanuatu with winds up to 055 kts. It is likely to help promote seismicity in the region of southern Vanuatu and Loyalty Islands in the next several days. The antipode of this epicenter is at 19N 10W an aseismic region of north Africa. No seismic enchancement is expected in this region.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
6450 0121 0129 0137 M1.0 (April 13, 2025) 1.0E-02
Eastern Washington M 3.0 01:46 UT
6460 0235 0241 0248 C6.5 (April 13, 2025) 2.2E-03
Myanmar M 5.5 02:25 UT
6470 0327 0333 0337 C6.5 (April 13, 2025) 4.0E-03
Eastern New Guinea M 5.5 03:48 UT
Eastern Washington M 2.1 03:30 UT
6560 0401 0405 0425 M1.1 (April 13, 2025) 2.4E-03
South Sandwich Is. M 5.2 04:15 UT
6480 0425 0428 0431 M1.1 (April 13, 2025) 4.8E-03
Tajikistan M 5.9 04:24 UT
6510 0448 0452 0454 M2.3 (April 13, 2025) 7.3E-03
Eastern Washington M 2.4, 2.4 04:49 UT
6530 0638 0652 0721 M1.0 (April 13, 2025) 2.1E-02
Samar Philippins M 4.2 06:38 UT
Volcano Is. M 4.5 06:44 UT
Tajikistan M 4.7 07:14 UT
6540 0809 0816 0836 C7.6 (April 13, 2025) 1.2E-02
6570 0943 0955 1003 M1.4 (April 13, 2025) 1.6E-02
6630 1003 1007 1010 M1.2 (April 13, 2025) 6.5E-03
6620 1349 1401 1414 C8.5 (April 13, 2025) 1.1E-02
New Britain M 5.0 16:04 UT
Siberia M 4.0 14:02 UT
6660 1458 1523 1528 C6.3 (April 13, 2025) 1.9E-03
6670 1528 1542 1556 M1.2 (April 13, 2025) 1.8E-02
New Britain M 4.8 16:04 UT
6710 1831 1835 1838 C6.8 (April 13, 2025) 4.6E-03
6720 1838 1851 1900 M3.2 (April 13, 2025) 2.6E-02
Fiji M 6.5 20:03 UT
Myanmar M 4.7 20:03 UT
6740 2037 2042 2051 C4.8 (April 13, 2025) 2.2E-03
Kyushu M 4.7 20:38 UT
6760 2142 2149 2154 C4.8 (April 13, 2025) 2.1E-03
6770 2155 2202 2211 M1.6 (April 13, 2025) 1.1E-02
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: unsettled April 14 active April 15 major storms April 16. Solar M-flare chance: 70% X-class: 15% proton storm: 10%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 18 28 14 04:00 6 80 164
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 14 17 08 2025 33.0 -116.6 5.2 SOUTHERN CALIFORNIA M117 T76 R61 Z105 B94
04 14 09 18 2025 -56.0 -121.4 4.9 SOUTHERN EAST PACIFIC RISE" M136 T52 R130 Z44 B83
04 14 08 43 2025 49.0 -119.5 2.5 NW OF OSOYOOS CANADA M102 T84 R51 Z115 B93
04 14 08 03 2025 40.4 -124.9 2.5 WNW OF PETROLIA CA M107 T75 R60 Z106 B88
04 14 07 53 2025 35.3 -117.8 2.8 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 14 07 07 2025 31.5 -104.1 2.1 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 14 04 43 2025 31.7 -104.2 2.2 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 14 04 05 2025 -40.1 174.4 4.2 PATEA NEW ZEALAND M95 T22 R157 Z8 B39
04 14 04 05 2025 -6.1 150.1 4.6 KIMBE PAPUA NEW GUINEA M59 T37 R133 Z42 B1
04 14 03 06 2025 33.0 -116.6 2.0 S OF JULIAN CA M117 T76 R61 Z105 B94
04 14 02 54 2025 40.4 -126.1 2.7 W OF FERNDALE CALIFORNIA M106 T74 R61 Z105 B87
04 14 02 28 2025 31.7 -104.5 2.4 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104
04 14 02 26 2025 36.3 -120.9 2.1 NEW IDRIA CA M112 T75 R61 Z105 B91
04 14 01 33 2025 0.5 126.1 5.3 WSW OF TERNATE INDONESIA M36 T62 R123 Z58 B26
04 14 00 16 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 13 22 59 2025 58.4 -152.6 4.1 SOUTHERN ALASKA M82 T80 R59 Z110 B78
04 13 22 54 2025 33.0 -116.6 3.3 S OF JULIAN CA M117 T76 R61 Z105 B94
04 13 22 46 2025 32.6 -115.7 2.4 PROGRESO B.C. MX M117 T76 R61 Z105 B95
04 13 22 34 2025 38.2 -121.6 2.2 KM NNE OF ISLETON M110 T76 R60 Z106 B91
04 13 22 11 2025 -1.5 -77.8 4.5 E OF PUYO ECUADOR M158 T95 R66 Z106 B130
04 13 22 09 2025 19.0 -68.1 3.6 PUNTA CANA DOMINICAN REPUBLIC M136 T110 R43 Z128 B139
04 13 21 49 2025 36.6 -121.3 2.4 TRES PINOS CA M111 T75 R61 Z105 B91
04 13 21 42 2025 58.0 -154.0 3.0 SOUTHERN ALASKA M81 T79 R59 Z109 B77
04 13 21 34 2025 36.6 -121.3 2.9 TRES PINOS CA M111 T75 R61 Z105 B91
04 13 21 30 2025 10.4 -86.2 5.0 TAMARINDO COSTA RICA M147 T91 R60 Z109 B122
04 13 20 19 2025 48.7 -119.5 2.5 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 20 03 2025 -26.0 -178.3 6.5 THE FIJI ISLANDS M95 T6 R143 Z24 B34
04 13 20 02 2025 19.8 95.6 4.7 TAUNGDWINGYI BURMA (MYANMAR) M2 T97 R94 Z91 B60
04 13 19 56 2025 59.4 -152.1 3.0 SOUTHERN ALASKA M81 T81 R58 Z111 B78
04 13 19 52 2025 -7.1 149.9 4.6 KANDRIAN PAPUA NEW GUINEA M60 T37 R134 Z41 B2
04 13 19 35 2025 -9.1 123.9 4.9 PANTE MAKASAR TIMOR LESTE M41 T60 R132 Z51 B27
04 13 18 42 2025 48.8 -119.5 2.1 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 17 44 2025 32.1 -101.1 2.0 S OF WESTBROOK TEXAS M123 T86 R52 Z114 B107
04 13 17 22 2025 31.1 139.2 4.0 IZU ISLANDS JAPAN REGION" M39 T68 R96 Z81 B38
04 13 17 15 2025 -44.2 -82.1 5.1 WEST CHILE RISE" M157 T77 R105 Z71 B110
04 13 17 00 2025 17.9 -65.2 3.2 ESPERANZA PUERTO RICO M136 T113 R43 Z129 B142
04 13 16 40 2025 -31.6 -178.5 5.1 KERMADEC ISLANDS REGION" M97 T11 R147 Z19 B37
04 13 16 30 2025 31.7 -104.2 2.2 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 16 04 2025 -6.3 152.0 4.8 KOKOPO PAPUA NEW GUINEA M61 T35 R133 Z42 B0
04 13 15 32 2025 -21.7 -70.3 4.6 NNW OF TOCOPILLA CHILE M167 T94 R81 Z95 B130
04 13 15 31 2025 31.8 -103.8 2.0 WNW OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 15 13 2025 18.9 -65.2 3.3 CULEBRA PUERTO RICO M135 T113 R42 Z129 B141
04 13 14 43 2025 40.8 36.1 4.4 WNW OF TAÅŸOVA TURKEY M53 T147 R46 Z143 B113
04 13 14 34 2025 38.9 70.8 4.7 ESE OF RASHT TAJIKISTAN M27 T121 R67 Z120 B86
04 13 14 30 2025 -11.0 164.2 4.8 LATA SOLOMON ISLANDS M74 T23 R136 Z35 B13
04 13 14 01 2025 31.7 -104.1 2.0 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 13 59 2025 -6.2 152.1 5.0 KOKOPO PAPUA NEW GUINEA M61 T35 R133 Z42 B0
04 13 13 46 2025 31.3 93.7 4.4 E OF NAGQU CHINA M9 T102 R83 Z101 B66
04 13 13 25 2025 31.7 -104.1 2.7 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 12 26 2025 36.3 -89.5 2.2 N OF RIDGELY TENNESSEE M121 T97 R42 Z124 B116
04 13 11 01 2025 48.8 -119.5 3.2 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 10 50 2025 32.4 -115.3 2.3 DELTA B.C. MX M118 T76 R61 Z105 B95
04 13 09 40 2025 52.6 158.8 4.6 SE OF VILYUCHINSK RUSSIA M56 T76 R74 Z99 B58
04 13 09 13 2025 48.7 149.8 5.9 THE KURIL ISLANDS M50 T75 R78 Z96 B54
04 13 07 58 2025 -6.4 151.7 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 13 06 14 2025 31.8 -103.8 2.0 WNW OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 05 39 2025 -3.1 126.3 4.4 SSE OF SANANA INDONESIA M38 T60 R127 Z55 B25
04 13 05 00 2025 48.7 -119.5 2.7 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 04 49 2025 48.7 -119.5 2.5 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 04 24 2025 39.0 70.7 5.8 E OF RASHT TAJIKISTAN M27 T121 R66 Z120 B86
04 13 04 15 2025 -60.1 -28.9 5.2 SOUTH SANDWICH ISLANDS REGION" M125 T94 R112 Z72 B114
04 13 03 48 2025 -6.7 147.4 5.5 LAE PAPUA NEW GUINEA M57 T39 R134 Z42 B4
04 13 03 39 2025 35.3 -117.8 2.1 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 13 03 11 2025 48.7 -119.5 2.9 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 03 05 2025 52.1 -169.3 4.0 SSW OF NIKOLSKI ALASKA M75 T72 R69 Z100 B66
04 13 02 24 2025 21.2 96.0 5.5 MEIKTILA BURMA (MYANMAR) M0 T97 R93 Z92 B60
04 13 02 17 2025 48.7 -119.5 2.3 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 01 46 2025 48.8 -119.5 3.1 NW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 01 46 2025 31.7 -104.1 2.3 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 01 36 2025 39.0 -111.4 2.6 WNW OF EMERY UTAH M114 T83 R54 Z112 B99
04 13 00 43 2025 34.9 142.1 4.4 SE OF HASAKI JAPAN M42 T68 R92 Z84 B41
04 13 00 33 2025 -6.2 151.8 4.8 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 13 00 12 2025 32.1 -102.2 3.1 NW OF MIDLAND TEXAS M123 T86 R53 Z113 B106
April 13, 2025
The full moon arrived on April 13, 2025 at 00:22 UT. Longitudes which were at local solar midnight at this time are located at about 5 West while those at local solar noon are near 175 East. In the east these include most of western Europe and Iceland and the Atlantic Ridges while in the west areas of the western Aleutians, Kamchatka, Tonga/Fiji/Samoa and portions of New Zealand and Vanuatu are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are considered moderate to high in the next week (April 11-19, 2025).
The full moon was accompanied by a flurry of moderately strong to strong earthquakes in many areas of the world. This included an M 5.9 (EMSC) to M 6.1 (NDI, BMG, GSRAS) in Tajikistan; an M 5.5 in Myanmar, the largest aftershock since the M 7.7 on March 28 with the past new moon; an M 5.5 (EMSC) to M 5.8 (BMG, BGS) in New Guinea; an M 5.2 in the South Sandwich Islands, an M 4.4 near Tokyo, Japan and an M 4.8 in New Britain all within about four hours after the full moon.
Another strong earthquake of M 5.9 (EMSC) to M 6.4 (GSRAS) occurred several hours
later in the area northwest of the Kuril Islands. These events were likely promoted in magnitude by tidal stresses associated with the full moon.
No tsunamis were expected with any of these events. Many of these were also associated with a pair of M-class solar flares as
reported by SWPC:
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0445 0452 0454 M2.3 (April 13, 2025) 2.3E-02*
XXXX 0345 0420 0430 M1.3 (April 13, 2025) 1.3E-02*
Tajikistan M 6.2 04:24 UT
NE Washington M 3.0, 2.4 .. 05:00 UT
South Sandwich Is. M 5.2 04:15 UT
Eastern New Guinea M 5.5 03:48 UT
Peru M 4.0 03:47 UT
The strongest of today's earthquakes (at this writing) was the M 5.9-6.4 in the
Kuril Islands. The local (Russian) network gave this event M 6.4 with the
following parameters:
O: 13APR2025 09:13:31 48.3N 150.2E MB=6.4 GSRAS Northwest of the Kuril Islands
O: 13APR2025 09:13:33 48.3N 149.8E MB=5.9 EMSC Northwest of the Kuril Islands
P: 19APR2025 171522 49.00 152.0E 3.5-5.5 CAAAA So. Kurils
This epicenter is located at the seventh node (51 degrees) from the M 7.7
in Myanmar of March 28 and may have been promoted by energy from that source.
Forecast 171522 had expected this event in mid-May was likely within about 200 km of today's epicenter.
The last earthquake in the Kuril Islands within about 200 km of this epicenter
occurred on June 6, 2024 with M 5.9. Three events of larger magnitude in the
extended area of about 300 km from today's epicenter have occurred in the
past 35 years - an M 5.9 on October 3, 2001; an M 6.3 on July 8, 2004 and an M 6.8
on December 27, 2024.
The epicenter of the M 5.5 in Myanmar was located midway between Mandalay and the capital of Myanmar - Naypyitaw where it was felt. But there were no immediate reported of new casualties or major damage with the M 5.5 today. In Wundwin people rushed out of buildings and some ceilings were reported to have collapsed.
NEIC reported the M 5.5 was felt with intensity VIII in Mandalay at Meiktila and V in Mandalay and III in Yamethin with III in Monywa, Sagaing, Myanmar and II in Thanyaburi Pathum, Thailand.
EMSC reported strong shaking in Myanmar at Wundwin, Meiktila, Thazi, Kyaukse, Patheingyi, Mandalay, Sagaing, Pyinoolwin, Aungmyaythazan, Patheingyi, Taunggyi.
Currently the official tolls from the M 7.7 on March 28 include 3649 dead and 5018 severely injured.
It is feared that a health emergency in Myanmar may be brewing as food and
care are in short supply. Today was the Thingyan holiday which is the traditional New Year's
day in Myanmar. The only aftershock of the M 7.7 of March 28 of magnitude larger
than M 5.5 occurred 12 minutes after the mainshock with M 6.7. At the time this
summary noted:
"The mainshock was followed 11 minutes and 7 seconds after the mainshock and was probably triggered
by a PcS phase returning to the epicenter after reflected off the core-mantle
boundary. Such returning phases often trigger major aftershocks of great earthquakes." (March 28, 2025)
Today's epicenter is located at the sixth node (60 degrees) from the M 5.9
in New Britain of April 4 and at the fourth node (90 degrees) from recent events in
the North Atlantic and New Zealand and may have been promoted by energy from those sources.
Forecasts 171409 had expected this earthquake was likely in Myanmar around April 14-17
within about 100 km of this epicenter.
O: 13APR2025 02:24:58 21.2N 96.0E MB=5.5 EMSC Myanmar
P: 17APR2025 171409 20.0N 96.0E 4.0-5.8 BBAAA Myanmar
P: 14APR2025 171409 21.0N 95.0E 4.0-6.0 AAAAA Myanmar
The earthquake in Tajikistan was possibly felt with intensity up to VII but reported with intensity IV in Dushanbe and III in Navabadski, Tajikistan. It was also felt with intensity III in Tashkent, Uzbekistan and Os Kyrgyzstan with lesser shaking in Celalabad, Kyrgyzstan.
EMSC reported strong shaking in Tajikistan at Khujand, Dushanbe, Rutsunzoda, in Uzbekistan in Shahrikhan, Dzhizak, Tashkent, Samarqand, Shakhrisabz, and Yashnobad, in Kyrgyzstan at Osh, in Kazakhstan at Shymkent and Bishkek.
The last earthquake of M>=5.9 within about 200 km of this epicenter occurred
as an M 5.9 on March 22, 2023. The last of larger magnitude was an M 6.0 on May 3, 2017.
At the time this summary noted:
"A strong earthquake of M 5.9-6.0 hit the region of Tajikistan today and was felt
in Uzbekistan, Kyrgyzstan and Tajikistan. NEIC reported intensity V in Adfijon, Uzbekistan; IV in Dushanbe, Tajikistan and II-III in Tashkent, Uzbekistan, Os, Kyrgyzstan; and III in Biskek, Kyrgyzstan.
An M 4.8 aftershock followed about 50 minutes after the mainshock. The last earthquake
within about 200 km of this epicenter in Tajikistan with M>=5.9 occurred on June 26, 2016 about 150 km east of this epicenter
and prior to that as an M 6.1 about 50 km to the north on July 18, 2011." (May 3, 2017)
This epicenter is at the third node (120 degrees) from recent large earthquakes
in Tonga and New Zealand and may have been promoted by energy from those sources.
Forecast 171437 had expected this earthquake in Tajikistan was likely around
April 17, 2025 within about 100 km of today's epicenter.
O: 13APR2025 04:24:02 39.0N 70.7E MB=5.9 EMSC Tajikistan
O: 13APR2025 04:24:02 38.9N 70.6E ML=6.1 IND Tajikistan
P: 17APR2025 171437 39.0N 72.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
NEIC reported the swarm in northeastern Washington State was being felt with intensity IV in Tonasket and II in Oroville, Washington.
The largest events in this series were reported felt in Seattle, Buckley and Omak, Washing and II in Washington at Federal Way, Loomis, Oroville, Riverside, and Coolin, Idaho.
The M 5.5 in Eastern New Guinea was initially reported felt with intensity III in Papua New Guinea at Lae, Morobe and Kainantu, Eastern Highlands.
This earthquake occurred near local solar noon and was likely promoted by tidal
stresses which maximize near this hour. The last earthquake with M>=5.5 within
about 200 km of this epicenter in New Guinea occurred as an M 5.6 on September 19, 2024
and prior to that on May 21, 2024 with M 5.7.
This epicenter is located near the ninth node (40 degrees) from Tonga, the sixth
node from Myanmar and the eighth node (135 degrees) form the North Atlantic
- all sites of recent strong earthquakes and may have been promoted by energy
related to those sources.
Forecast 171356 had expected enhanced seismicity within about 200 km of this
epicenter was likely in mid-April.
O: 13APR2025 03:48:24 6.7S 147.4E ML=5.5 EMSC Eastern New Guinea Region, P.N.G.
O: 13APR2025 03:48:24 6.7S 147.4E ML=5.7 GSRAS Eastern New Guinea Region, P.N.G.
P: 17APR2025 171356 7.0S 145.0E 4.0-5.5 BABAA New Ireland
A moderate M 5.0 (EMS) to M 5.5 (NSMC - Pakistan's National Seismic Monitoring Centre) earthquake also struck Pakistan today. NEIC reported it was felt in Pakistan in the Pumjab region with intensity VI (minor damage) at Hazro; V in Attock, Txila and Wah and in Haripur, Northwest Frontier; IV in Islamabad, Abottabad, Topi, Zaida, Rawalpindi and III in Mardan, Chiniot, Jauharabad, Kalur and II in Peshawar, and Ghurgushti.
There were no immediate reports of major damage or casualties. NSMC reported the quake was felt strongly in Punjab at Attock, Chakwal and Mianwal districts and adjacent region. Lighter shaking occurred
in Peshawar, Mardan, mohmand and Shabqadar in Kyber Pakhtunkhwa Province. This
is an area where a major earthquake occurred in 2005 killing almost 75,000 people
near Gujarat.
The last earthquake in Pakistan within about 200 km of this epicenter with M>=5.0
occurred as an M 5.2 on December 5, 2024 and as an M 5.1 on August 20, 2024.
At the time this summary noted:
"NEIC reported an earthquake of M 5.2 in Pakistan was felt with intensity up to IV in the area(s) of Pakistan at Jhelum and Kharian, Punjab and in Himachal Pradesh, India at Bakloh. Intensity III was felt in Punjab at Kahna, Lahore with lesser shaking in Jalapur, Shekhupura and Islamabad.
EMSC added it was felt with moderate intensity in New Amritsar, India and in Pakistan at Lahore, and Daulat Nagar." December 5, 2024)
and
"A pair of unusual earthquakes shook the region of northern India near the Pakistan border today.
NEIC reported these earthquakes of M 5.1 and M 5.1 in Jammu and Kashmir, India was felt with intensity up to IV in the area(s) of Jammu and Kashmir, India at Baramula (VI), Uri (IV) and Srinagar (III).
EMSC reported two strong jolts in India at Spopore, Khawaja Bagh, Soyibug, Bachharura, Sora, Srinagar, Hafiz Bagh, Chadoora, and in areas of Pakistan." (August 20, 2024)
Today's earthquake, like that earlier in New Ireland (see above) occurred within
minutes of local solar noon and was coincident with a strong solar flare. SWPC
data for this flare follow:
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0700 0720 0730 M1.0 (April 12, 2025) 1.3E-02*
Pakistan M 5.1 07:30 UT
Ecuador M 4.0 07:11 UT
Nepal M 4.3 07:32 UT
The epicenter in Pakistan is at the fifth node (72 degrees) from the M 6.9 in the
Reykjanes Ridge and at the third node from Tonga (120 degrees) and may have been promoted
by energy from thoses sources.
O: 12APR2025 07:30:46 33.8N 72.6E ML=5.0 EMSC Pakistan
P: 12APR2025 171357 5.0S 151.0E 4.0-5.9 AABAA New Ireland
NEIC reported an earthquake of M 3.1 in Western Texas was felt with intensity up to II-III in the area(s) of Western Texas with IV in Midland; II in Lubbock.
EMSC reported it with M 3.5 was felt with moderate intensity in Carlsbad, New Mexico.
NEIC reported an earthquake of M 4.5 in Guam was felt with intensity up to II-III in the area(s) of Guam with III in Tamuning, Dededo and II in Merizo and Yigo, Guam.
NEIC reported an earthquake of M 3.3 in Hawaii was felt with intensity up to II-III in the area(s) of Hawaii with III at Pahala, Pahoa, Volcano and II in Hakalau, Hilo, Honomu, Kihei, Laupahoehoe, Mountain View and Pepeekeo.
EMSC reported an earthquake of M 4.2 in Peru was felt with intensity up to IV in the area(s) of Peru at Ate.
EMSC reported an earthquake of M 4.4 in Coquimbo, Chile was felt with intensity up to I2 in the area(s) of Santiago, Chile.
CSN reported the following parameters for this earthquake:
12-04-2025 22:49 31.55S 71.32W 40 4.7 IV Coquimbo at Canela, Illapel, Punitaqui; III in Los Vilos, Salamanca and Combarbala, Chile.
TROPICAL CYCLONE 29S
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 29S 2025-04-13 00:00 UT 12.2S 125.8E 045 kts North of Australia
Tropical 29S continued today in the area north of Australia and south of the Banda Sea, Indonesia with winds up to 045 kts. It is likely to help promote seismicity in the Banda Sea in the next several days. The antipode of this epicenter is at 12N 55W, an area of the north Atlantic with little seismicity, But as it continued to track to the southwest the antipode will encounter the Leeward and Windward Islands of the eastern Caribbean. Should this storm continue it could enhance seismicity in that region around April 14-16, 2025.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0445 0452 0454 M2.3 (April 13, 2025) 2.3E-02*
XXXX 0400 0420 0430 M1.3 (April 13, 2025) 1.3E-02*
6110 0036 0044 0055 C5.6 (April 12, 2025) 6.5E-03
6130 0131 0138 0140 C4.0 (April 12, 2025) 2.4E-03
Turkey M 4.3 01:37 UT
6140 0221 0230 0237 C4.0 (April 12, 2025) 1.8E-03
6240 0258 0306 0314 C3.8 (April 12, 2025) 4.7E-03
Oaxaca M 4.1 03:07 UT
6150 0314 0323 0326 C3.7 (April 12, 2025) 1.6E-03
Tonga M 5.3 03:16 UT
6160 0333 0339 0342 C8.2 (April 12, 2025) 3.5E-03
New Ireland M 6.1 03:47 UT
6250 0441 0445 0455 M1.1 (April 12, 2025) 2.0E-03
Tonga M 4.9 04:48 UT
6180 0455 0500 0502 C9.5 (April 12, 2025) 5.1E-03
6190 0536 0549 0555 M1.2 (April 12, 2025) 1.0E-02
6210 0711 0719 0722 M1.0 (April 12, 2025) 4.7E-03
Pakistan M 5.1 07:31 UT
6260 0734 0747 0757 C8.4 (April 12, 2025) 2.1E-03
Nepal M 4.3 07:33 UT
6220 0757 0802 0809 C7.6 (April 12, 2025) 6.1E-03
San Francisco M 2.0 07:57 UT
6270 0952 1002 1010 C4.8 (April 12, 2025) 1.4E-03
Indian-Antarctic Ridge M 5.0 09:59 UT
6280 1010 1019 1021 C5.8 (April 12, 2025) 6.2E-03
6300 1021 1026 1034 C9.2 (April 12, 2025) 7.1E-03
Myanmar M 4.2 10:33 UT
6290 1105 1117 1125 M2.0 (April 12, 2025) 1.6E-02
Myanmar M 4.0 11:15 UT
6310 1135 1143 1145 M2.7 (April 12, 2025) 3.2E-03
6320 1233 1240 1252 M2.3 (April 12, 2025) 2.2E-02
South Sandwich Is. M 5.0 12:37 UT
New Britain M 4.6 12:52 UT
6340 1425 1434 1441 C4.6 (April 12, 2025) 2.9E-03
Barbar, Indonesia M 4.2 14:31 UT
6350 1500 1512 1519 M1.3 (April 12, 2025) 1.4E-03
6370 1941 1944 1947 C5.5 (April 12, 2025) 2.2E-03
6400 2044 2054 2117 C6.1 (April 12, 2025) 1.2E-02
Northern Mexico M 4.2 21:03 UT
Banda Sea M 4.3 21:05 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 13 unsettled April 14 quiet April 15. Solar M-flare chance: 70% X-class: 15% proton storm: 10%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 20 32 13 17:00 5 103 165
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 13 09 13 2025 48.7 149.8 5.9 THE KURIL ISLANDS M50 T75 R78 Z96 B54
04 13 09 13 2025 48.3 150.2 6.4 NORTHWEST OF THE KURIL ISLANDS M50 T75 R79 Z95 B54
04 13 09 13 2025 48.3 149.8 5.9 NORTHWEST OF THE KURIL ISLANDS M50 T75 R79 Z95 B54
04 13 07 58 2025 -6.4 151.7 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 13 05 39 2025 -3.1 126.3 4.4 SSE OF SANANA INDONESIA M38 T60 R127 Z55 B25
04 13 05 00 2025 48.9 -119.5 2.4 SSW OF OROVILLE WASHINGTON M102 T84 R52 Z115 B93
04 13 04 24 2025 39.0 70.7 5.9 TAJIKISTAN M27 T121 R66 Z120 B86
04 13 04 24 2025 39.0 70.7 5.8 E OF RASHT TAJIKISTAN M27 T121 R66 Z120 B86
04 13 04 24 2025 38.9 70.6 6.1 TAJIKISTAN M27 T122 R66 Z120 B86
04 13 04 15 2025 -60.1 -28.9 5.2 SOUTH SANDWICH ISLANDS REGION" M125 T94 R112 Z72 B114
04 13 03 48 2025 -6.7 147.4 5.7 EASTERN NEW GUINEA REGION, P.N M57 T39 R134 Z42 B4
04 13 03 48 2025 -6.7 147.4 5.5 LAE PAPUA NEW GUINEA M57 T39 R134 Z42 B4
04 13 03 48 2025 -6.7 147.4 5.5 EASTERN NEW GUINEA REGION, P.N M57 T39 R134 Z42 B4
04 13 03 39 2025 35.3 -117.8 2.1 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 13 03 11 2025 48.8 -119.5 2.6 N OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 03 05 2025 52.1 -169.3 4.0 SSW OF NIKOLSKI ALASKA M75 T72 R69 Z100 B66
04 13 02 58 2025 31.5 -104.0 2.0 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 13 02 24 2025 21.2 96.0 5.5 MYANMAR M0 T97 R93 Z92 B60
04 13 02 24 2025 21.2 96.0 5.5 MEIKTILA BURMA (MYANMAR) M0 T97 R93 Z92 B60
04 13 01 46 2025 48.7 -119.5 3.1 NNW OF TONASKET WASHINGTON M102 T84 R52 Z114 B93
04 13 01 46 2025 31.7 -104.1 2.3 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 13 00 43 2025 34.9 142.1 4.4 SE OF HASAKI JAPAN M42 T68 R92 Z84 B41
04 13 00 33 2025 -6.2 151.8 4.8 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 13 00 12 2025 32.1 -102.2 3.1 NW OF MIDLAND TEXAS M123 T86 R53 Z113 B106
04 12 23 11 2025 40.8 -123.3 2.7 WNW OF WEAVERVILLE CA M107 T76 R59 Z107 B90
04 12 22 49 2025 -31.5 -71.5 4.4 WNW OF ILLAPEL CHILE M165 T89 R90 Z86 B124
04 12 22 46 2025 36.1 -97.8 2.1 KM E OF HENNESSEY M120 T91 R48 Z119 B110
04 12 21 05 2025 -4.7 125.5 4.3 S OF SANANA INDONESIA M39 T60 R128 Z54 B26
04 12 20 43 2025 35.3 -117.8 2.2 W OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 12 18 57 2025 -14.2 -13.8 4.6 SOUTHERN MID-ATLANTIC RIDGE" M113 T140 R68 Z119 B155
04 12 18 29 2025 13.7 145.0 4.5 YIGO VILLAGE GUAM M47 T52 R113 Z63 B20
04 12 17 42 2025 23.2 124.6 4.2 SSE OF ISHIGAKI JAPAN M26 T73 R101 Z78 B39
04 12 17 13 2025 19.3 -155.4 3.3 NE OF PÄHALA HAWAII M99 T43 R93 Z74 B57
04 12 17 03 2025 31.5 -104.0 2.0 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 12 15 53 2025 38.7 -122.8 2.4 SSW OF THE GEYSERS M109 T75 R60 Z106 B90
04 12 13 53 2025 -18.0 -178.6 4.3 E OF LEVUKA FIJI M92 T4 R136 Z31 B31
04 12 13 44 2025 36.7 -121.3 2.1 TRES PINOS CA M111 T75 R61 Z105 B91
04 12 13 32 2025 31.5 -115.7 2.0 MANEADERO B.C. MX M118 T75 R61 Z104 B95
04 12 12 58 2025 32.3 -104.5 2.5 WHITES CITY NEW MEXICO M122 T84 R54 Z112 B104
04 12 12 52 2025 -6.3 151.5 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 12 12 37 2025 -56.0 -27.7 5.0 SOUTH SANDWICH ISLANDS REGION" M126 T98 R108 Z77 B118
04 12 12 19 2025 32.3 -104.5 3.5 WHITES CITY NEW MEXICO M122 T84 R54 Z112 B104
04 12 12 17 2025 34.3 -119.5 2.2 SSE OF CARPINTERIA CA M114 T74 R62 Z104 B92
04 12 12 09 2025 -29.6 -72.1 4.6 WNW OF COQUIMBO CHILE M166 T89 R89 Z87 B125
04 12 10 52 2025 35.6 -96.7 2.0 NNW OF PRAGUE OKLAHOMA M121 T91 R47 Z119 B111
04 12 10 26 2025 18.9 -65.0 3.6 AMALIE U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142
04 12 09 59 2025 -49.2 123.0 5.0 WESTERN INDIAN-ANTARCTIC RIDGE M74 T57 R163 Z28 B49
04 12 09 37 2025 18.2 -65.1 3.1 CULEBRA PUERTO RICO M135 T113 R42 Z129 B142
04 12 07 57 2025 37.9 -122.1 2.0 WALNUT CREEK CA M110 T75 R60 Z105 B90
04 12 07 30 2025 33.8 72.6 5.0 ENE OF SANJWAL PAKISTAN M23 T120 R71 Z115 B84
04 12 04 48 2025 -16.4 -173.7 4.8 SSE OF HIHIFO TONGA M96 T3 R132 Z34 B35
04 12 03 47 2025 -4.7 153.2 6.1 KOKOPO PAPUA NEW GUINEA M62 T35 R131 Z43 B1
04 12 03 16 2025 -16.6 -173.9 5.3 S OF HIHIFO TONGA M96 T3 R133 Z34 B35
04 12 03 08 2025 45.3 -112.6 2.4 N OF DILLON MONTANA M108 T85 R50 Z116 B98
04 12 01 37 2025 38.2 29.7 4.5 S OF ÇIVRIL TURKEY M58 T152 R44 Z147 B118
04 12 01 22 2025 37.0 -121.6 2.3 WSW OF GILROY CA M111 T75 R61 Z105 B90
04 12 00 48 2025 40.3 -124.5 2.8 W OF PETROLIA CA M107 T75 R60 Z106 B89
04 12 00 21 2025 36.5 -98.8 2.1 KM SE OF WAYNOKA M120 T90 R48 Z118 B109
April 12, 2025
The full moon will arrive on April 13, 2025 at 00:22 UT. Longitudes which are at local solar midnight at this time are located at about 5 West while those at local solar noon are near 175 East. In the east these include most of western Europe and Iceland and the Atlantic Ridges while in the west areas of the western Aleutians, Kamchatka, Tonga/Fiji/Samoa and portions of New Zealand and Vanuatu are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are considered moderate to high in the next week (April 11-19, 2025).
A strong earthquake of M 6.2 (NEIC) to 6.3 (BGS) occurred in New Ireland, PNG today. NEIC reported it was felt with intensity III iNamatanai, New Ireland and Kokopo, New Britain, PNG.
This appears to be a regional aftershock of the M 6.9 in New Britain of April 4, 2025.
The last earthquake of M>=6.2 within about 200 km of this epicenter in New Ireland of equal or larger magnitude than
today's was an M 6.6 of November 15, 2024. This event also occurred with the
full moon of November 15, 2024 and had been noted at the time in
this summary as:
"The strongest earthquake in the world today was an M 6.6 in New Ireland, PNG. NEIC reported it was felt with maximum intensity IV in East New Britain at Kokopo and III in Namatanai, New Ireland.
This event of M 6.6 is the strongest within about 200 km of this epicenter since
an M 7.5 on May 14, 2019. At the time this summary noted:
"The strongest earthquake in the world today was an M 7.5-7.7 in the New Britain
region of Papua New Guinea. NEIC reported it was felt with maximum intensity VII
in Rabaul, New Britain and VI in Kokopo; V in Namatanai, New Ireland; IV in Arawa, Solomon Islands and II-III in Kavleng, New Ireland and within about 500 km of the epicenter.
It was also reported felt with moderate to strong intensity in Port Vila, Lihir Island, Bougainville, Port Moresby with power blackouts in the
Kokopo area. PTWC issued a tsunami warning but this was later withdrawn. Villagers
near the epicenter on the west coast of New Ireland reported seeing the ocean
recede but no damaging waves were recorded. Damage did occur in New Britain but
immediate reports are unclear as to how great it was. This is the strongest
earthquake in the world during the year 2019 to date. An M 7.5 hit the region of Ecuador
on February 22, 2019, the largest previous during this year. This earthquake
was simultaneous with the strongest geomagnetic storm since August 26, 2018 when AP reached 76." (May 14, 2019, November 15, 2024)
Forecast 171357 had expected this earthquake was likely within about 200
km around April 12, 2025. This epicenter is at the tenth node (36 degrees)
from the earthquake of M 7.1 in Tonga of March 30 and at the sixth node (60 degrees)
from the M 7.7 in Myanmar of March 28 and may have been promoted by energy
from those sources.
Initial parameters for this earthquake from EMSC are:
O: 12APR2025 03:47:11 4.7S 153.2E ML=6.2 EMSC New Ireland Region, PNG
P: 12APR2025 171357 5.0S 151.0E 4.0-5.9 AABAA New Ireland
This earthquake occurred near local solar noon at a latitude which was near
sub-solar at the time of the event and may have been promoted by tidal and/or
geomagnetic effects which maximize near this hour. It may also have been
promoted by an C9.0-M1.0 class solar flare which was in progress at the time
of the earthquake.
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0333 0339 0350 M1.0 (April 12, 2025) 1.3E-02*
New Ireland M 6.1 03:47 UT
A moderate M 5.0 earthquake also struck Pakistan today. NEIC reported it was felt in Pakistan in the Pumjab region with intensity VI (minor damage) at Hazro; V in Attock, Txila and Wah and in Haripur, Northwest Frontier; IV in Islamabad, Abottabad, Topi, Zaida, Rawalpindi and III in Mardan, Chiniot, Jauharabad, Kalur and II in Peshawar, and Ghurgushti.
The last earthquake in Pakistan within about 200 km of this epicenter with M>=5.0
occurred as an M 5.2 on December 5, 2024 and as an M 5.1 on August 20, 2024.
At the time this summary noted:
"NEIC reported an earthquake of M 5.2 in Pakistan was felt with intensity up to IV in the area(s) of Pakistan at Jhelum and Kharian, Punjab and in Himachal Pradesh, India at Bakloh. Intensity III was felt in Punjab at Kahna, Lahore with lesser shaking in Jalapur, Shekhupura and Islamabad.
EMSC added it was felt with moderate intensity in New Amritsar, India and in Pakistan at Lahore, and Daulat Nagar." December 5, 2024)
and
"A pair of unusual earthquakes shook the region of northern India near the Pakistan border today.
NEIC reported these earthquakes of M 5.1 and M 5.1 in Jammu and Kashmir, India was felt with intensity up to IV in the area(s) of Jammu and Kashmir, India at Baramula (VI), Uri (IV) and Srinagar (III).
EMSC reported two strong jolts in India at Spopore, Khawaja Bagh, Soyibug, Bachharura, Sora, Srinagar, Hafiz Bagh, Chadoora, and in areas of Pakistan." (August 20, 2024)
Today's earthquake, like that earlier in New Ireland (see above) occurred within
minutes of local solar noon and was coincident with a strong solar flare. SWPC
data for this flare follow:
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0700 0720 0730 M1.0 (April 12, 2025) 1.3E-02*
Pakistan M 5.1 07:30 UT
Ecuador M 4.0 07:11 UT
Nepal M 4.3 07:32 UT
The epicenter in Pakistan is at the fifth node (72 degrees) from the M 6.9 in the
Reykjanes Ridge and at the third node from Tonga (120 degrees) and may have been promoted
by energy from thoses sources.
O: 12APR2025 07:30:46 33.8N 72.6E ML=5.0 EMSC Pakistan
P: 12APR2025 171357 5.0S 151.0E 4.0-5.9 AABAA New Ireland
An earthquake of M 4.4 in the Gulf of California occurred today. This event
is at the sixth node (60 degrees) from the Reykjanes Ridge of April 3, 2025 (M 6.9) and at 104 degrees
from the M 6.8 in New Zealand of March 25, 2025 and may have been promoted by
energy from these sources. It was accompanied by a moderate increase
in seismicity in the northern Gulf of California and southern California.
TROPICAL CYCLONE 29S
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 29S 2025-04-12 00:00 UT 11.7S 126.4E 045 kts North of Australia
Tropical 29S continued today in the area north of Australia and south of the Banda Sea, Indonesia with winds up to 045 kts. It began near the epicenter of the M 5.5-5.9 in Papua New Guinea yesterday. It is likely to help promote seismicity in the Banda Sea in the next several days. The antipode of this epicenter is at 12N 54W, an area of the north Atlantic with little seismicity, But as it continued to track to the southwest the antipode will encounter the Leeward and Windward Islands of the eastern Caribbean. Should this storm continue it could enhance seismicity in that region around April 13-15, 2025.
NEIC reported an earthquake of M 2.7 in Northern California was felt with intensity up to II-III in the area(s) of Northern California at Standish with III and II in Janesville and Marysville and in Winnemucca, Nevada.
NEIC reported an earthquake of M 4.3 in the area of Tripura, India was felt with intensity up to II-III in the area(s) of the area of Tripura, India at Gartala and Udaipur and in Bangladesh at Dacca and Tungi, Gazipur.
EMSC reported big jolt in India at Agartala and Kohima Sadar, and in Bangladesh at Dhaka, Narayanganj.
EMSC reported an earthquake of M 4.0 in Morocco was felt with intensity up to I in the area(s) of Morocco in Bni Yakhlef, El Maarif, and in Gibraltar.
EMSC reported earthquakes of M 4.6 and M 4.2 in Myanmar were felt with intensity up to IV in the area(s) of Myanmar at Mandalay, Hlaingthaya, Tatkon and Naypyitaw.
EMSC reported an earthquake of M 2.3 in Central California was felt with intensity up to II in the area(s) of Central California in Ridgecrest with a low rumble.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0333 0339 0350 M1.0 (April 12, 2025) 1.3E-02*
New Ireland M 6.1 03:47 UT
XXXX 0700 0720 0730 M1.0 (April 12, 2025) 1.3E-02*
Pakistan M 5.1 07:30 UT
Ecuador M 4.0 07:11 UT
Nepal M 4.3 07:32 UT
5750 0703 0714 0727 C4.4 (April 11, 2025) 5.0E-03
5760 0820 0828 0835 C3.7 (April 11, 2025) 7.5E-04
5780 0947 0956 1000 C2.4 (April 11, 2025) 1.8E-03
Xizang M 4.4 09:57 UT
5820 1152 1215 1238 C7.2 (April 11, 2025) 1.4E-02
5860 1335 1339 1343 C4.1 (April 11, 2025) 2.2E-03
New Guinea M 4.4 13:45 UT
Gulf of California M 4.4 14:00 UT
5890 1614 1625 1632 C7.4 (April 11, 2025) 1.7E-03
5930 1634 1638 1640 C6.8 (April 11, 2025) 4.8E-03
5900 1640 1650 1701 M1.0 (April 11, 2025) 1.3E-02
5970 1846 1852 1854 C6.8 (April 11, 2025) 5.1E-03
Chiapas M 3.6 18:48 UT
6000 1854 1859 1911 C6.8 (April 11, 2025) 7.7E-03
6060 2208 2220 2233 M1.0 (April 11, 2025) 1.2E-02
New Guinea M 5.0 22:24 UT
Iceland M 3.1 22:30 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: minor storms April 12 active April 13 unsettled April 14. Solar M-flare chance: 50% X-class: 5% proton storm: 5%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 18 22 14 01:00 5 121 170
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 12 13 53 2025 -18.0 -178.6 4.3 E OF LEVUKA FIJI M92 T4 R136 Z31 B31
04 12 13 44 2025 36.7 -121.3 2.1 TRES PINOS CA M111 T75 R61 Z105 B91
04 12 13 32 2025 31.5 -115.7 2.0 MANEADERO B.C. MX M118 T75 R61 Z104 B95
04 12 12 52 2025 -6.3 151.5 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 12 12 37 2025 -56.0 -27.7 5.0 SOUTH SANDWICH ISLANDS REGION" M126 T98 R108 Z77 B118
04 12 12 19 2025 32.3 -104.5 3.5 WHITES CITY NEW MEXICO M122 T84 R54 Z112 B104
04 12 12 17 2025 34.3 -119.5 2.2 SSE OF CARPINTERIA CA M114 T74 R62 Z104 B92
04 12 12 09 2025 -29.6 -72.1 4.6 WNW OF COQUIMBO CHILE M166 T89 R89 Z87 B125
04 12 10 52 2025 35.6 -96.7 2.0 NNW OF PRAGUE OKLAHOMA M121 T91 R47 Z119 B111
04 12 10 26 2025 18.9 -65.0 3.6 AMALIE U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B142
04 12 09 59 2025 -49.2 123.0 5.0 WESTERN INDIAN-ANTARCTIC RIDGE M74 T57 R163 Z28 B49
04 12 09 37 2025 18.2 -65.1 3.1 CULEBRA PUERTO RICO M135 T113 R42 Z129 B142
04 12 07 57 2025 37.9 -122.1 2.0 WALNUT CREEK CA M110 T75 R60 Z105 B90
04 12 07 30 2025 33.8 72.6 5.0 ENE OF SANJWAL PAKISTAN M23 T120 R71 Z115 B84
04 12 04 48 2025 -16.4 -173.7 4.8 SSE OF HIHIFO TONGA M96 T3 R132 Z34 B35
04 12 03 47 2025 -4.7 153.2 6.1 KOKOPO PAPUA NEW GUINEA M62 T35 R131 Z43 B1
04 12 03 16 2025 -16.6 -173.9 5.3 S OF HIHIFO TONGA M96 T3 R133 Z34 B35
04 12 03 08 2025 45.3 -112.6 2.4 N OF DILLON MONTANA M108 T85 R50 Z116 B98
04 12 01 22 2025 37.0 -121.6 2.3 WSW OF GILROY CA M111 T75 R61 Z105 B90
04 12 00 48 2025 40.3 -124.5 2.8 W OF PETROLIA CA M107 T75 R60 Z106 B89
04 12 00 21 2025 36.5 -98.8 2.1 KM SE OF WAYNOKA M120 T90 R48 Z118 B109
04 11 22 24 2025 -5.6 146.6 5.0 MADANG PAPUA NEW GUINEA M56 T41 R133 Z44 B5
04 11 21 47 2025 32.4 -102.1 2.7 LOS YBANEZ TEXAS M123 T86 R53 Z113 B106
04 11 21 36 2025 40.3 -120.4 2.7 HONEY LAKE CA M109 T78 R58 Z108 B92
04 11 21 15 2025 49.4 -120.4 2.1 SE OF PRINCETON CANADA M101 T84 R52 Z114 B93
04 11 20 59 2025 45.9 -120.2 2.0 SSE OF BICKLETON WASHINGTON M104 T81 R54 Z112 B92
04 11 20 56 2025 35.9 -117.6 2.0 LITTLE LAKE CA M114 T77 R59 Z106 B94
04 11 20 41 2025 -4.6 68.8 4.7 CHAGOS ARCHIPELAGO REGION" M37 T113 R100 Z91 B82
04 11 20 12 2025 -22.0 -68.7 4.3 NNE OF CALAMA CHILE M165 T95 R80 Z95 B131
04 11 18 25 2025 -6.3 150.4 4.4 KIMBE PAPUA NEW GUINEA M60 T37 R133 Z42 B1
04 11 18 20 2025 39.9 -120.8 2.3 SPRING GARDEN CA M109 T77 R58 Z108 B91
04 11 17 48 2025 31.7 -104.4 2.0 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 11 17 43 2025 31.6 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104
04 11 14 19 2025 16.4 -92.8 4.4 GUERRERO (EL CHICHONAL) MEXICO M140 T87 R59 Z109 B116
04 11 14 12 2025 41.4 -72.6 1.6 NNW OF KILLINGWORTH CONNECTICU M116 T111 R29 Z138 B127
04 11 14 12 2025 35.3 -117.8 2.1 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 11 14 05 2025 -1.6 126.4 4.4 NE OF SANANA INDONESIA M37 T61 R125 Z56 B25
04 11 14 03 2025 33.9 -116.0 2.1 TWENTYNINE PALMS CA M116 T77 R60 Z106 B95
04 11 13 58 2025 33.9 -116.0 2.1 TWENTYNINE PALMS CA M116 T77 R60 Z106 B95
04 11 13 46 2025 -2.7 139.2 4.3 W OF ABEPURA INDONESIA M48 T48 R129 Z49 B12
04 11 11 37 2025 19.6 -65.4 3.4 VIEQUES PUERTO RICO M134 T113 R41 Z130 B141
04 11 11 34 2025 55.2 -157.2 3.1 ALASKA PENINSULA M81 T76 R63 Z106 B74
04 11 10 52 2025 23.9 91.2 4.3 NW OF AGARTALA INDIA M4 T102 R89 Z97 B66
04 11 10 26 2025 19.3 -65.8 3.1 SUáREZ PUERTO RICO M135 T112 R42 Z129 B141
04 11 09 57 2025 28.6 87.3 4.3 NE OF LOBUCHE NEPAL M10 T106 R83 Z103 B70
04 11 08 31 2025 40.2 -121.3 2.0 WSW OF ALMANOR CA M109 T77 R58 Z108 B91
04 11 08 02 2025 39.4 -119.6 2.4 NNE OF VIRGINIA CITY, NEVADA M110 T78 R58 Z108 B92
04 11 07 58 2025 44.4 -116.1 2.4 SMITHS FERRY IDAHO M107 T83 R53 Z113 B95
04 11 07 35 2025 41.1 -124.0 2.4 E OF WESTHAVEN-MOONSTONE CA M107 T76 R59 Z107 B89
04 11 06 56 2025 33.5 -116.5 2.2 ESE OF ANZA CA M116 T76 R60 Z105 B94
04 11 05 46 2025 29.3 130.5 4.5 S OF YUDOMARI JAPAN M31 T72 R96 Z82 B40
04 11 05 41 2025 29.2 130.5 4.6 S OF YUDOMARI JAPAN M31 T72 R97 Z82 B40
04 11 05 28 2025 37.2 -118.2 2.3 BIG PINE CA M112 T77 R59 Z107 B93
04 11 05 26 2025 1.5 127.5 4.3 WSW OF TOBELO INDONESIA M36 T61 R123 Z58 B25
04 11 05 15 2025 39.6 -123.0 2.3 LAKE PILLSBURY CA M108 T76 R60 Z106 B90
04 11 05 15 2025 29.2 130.6 4.4 S OF KOSHIMA JAPAN M32 T72 R97 Z82 B40
04 11 05 06 2025 29.2 130.4 5.0 NE OF TATSUGÅ JAPAN M31 T72 R97 Z82 B40
04 11 04 29 2025 20.9 96.0 4.8 MEIKTILA BURMA (MYANMAR) M1 T97 R93 Z92 B60
04 11 03 38 2025 -6.1 151.7 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 11 03 18 2025 18.9 145.5 4.9 REGION NORTHERN MARIANA ISLAND M46 T55 R108 Z67 B25
04 11 02 53 2025 33.2 -115.6 2.5 NW OF CALIPATRIA CA M117 T76 R60 Z106 B95
04 11 02 52 2025 33.2 -115.6 3.3 WNW OF CALIPATRIA CA M117 T76 R60 Z106 B95
04 11 02 42 2025 41.4 -112.2 2.2 W OF WILLARD UTAH M111 T83 R52 Z113 B98
04 11 02 28 2025 35.3 -117.8 2.0 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 11 02 26 2025 31.9 -103.8 2.1 NW OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 11 01 57 2025 56.6 -155.9 3.2 ALASKA PENINSULA M81 T78 R61 Z107 B75
04 11 01 30 2025 31.5 -115.6 2.1 OVIEDO MOTA B.C. MX M118 T75 R61 Z105 B95
04 11 00 19 2025 18.9 -66.5 3.2 NUEVAS PONIENTE PUERTO RICO M135 T112 R43 Z129 B140
April 11, 2025
The full moon will arrive on April 13, 2025 at 00:22 UT. Longitudes which are at local solar midnight at this time are located at about 5 West while those at local solar noon are near 175 East. In the east these include most of western Europe and Iceland and the Atlantic Ridges while in the west areas of the western Aleutians, Kamchatka, Tonga/Fiji/Samoa and portions of New Zealand and Vanuatu are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are considered moderate to high in the next week (April 11-19, 2025).
The strongest earthquake in the world today was an M 5.5 (NEIC, EMSC) to M 5.9 (BMG) in Papua New Guinea. NEIC reported it was felt with intensity II in Kiunga Fly River, PNG.
The last earthquake in New Guinea within about 250 km of this epicenter with M>=5.9
occurred on December 30, 2023 with M 6.5 and prior to that as an M 5.9 on January 12, 2021.
Nearly all the major or moderate earthquakes in PNG in this area occur
about 200 km north of today's epicenter. There have been no earthquakes
of M>=5.9 recorded within about 200 km of today's epicenter in the past 35 years.
An M 7.0 did occur on April 6, 2013 about 200 km north of today's epicenter.
At the time this summary noted:
"The strong earthquake of M 7.0-7.3 in Papua New Guinea was felt with intensity
V in Mulia, IV in Tanah Merah, Sentani, Wamena, Jayapura, Genyem, Mamberamo,
III-IV in Sarmi, and Waropen and III in Merauke, Mapi and II in Timika,
New Guinea according to data from the local network - BMG. NEIC reported
intensity III in Aberpura, Papua, Indonesia. No tsunami was observed
or expected with this earthquake and the quake epicenter was on land but panicked crowds in eastern Papua
rushed into the streets. Slight damage is expected in the mountainous
areas but this has not yet been reported. The last strong earthquake in
this general area of New Guinea occurred as an M 7.0 on June 16, 2010.
This event was about 300 km northwest of today's epicenter.
The Los Angeles area of Southern California is located at 103 degrees from
this epicenter in New Guinea. Several light earthquake occurred in that area
today. Seismic energy is concentrated at this distance following major earthquakes
due to refraction and reflection off the core-mantle boundary to this
distance zone. Seismicity is often seen to increase at this distance following
major earthquakes. For example, the two great earthquake in this area of
Papua New Guinea in the past 50 years occurred on January 10, 1971 (M 8.1)
and on September 12, 1979 (M 8.0). These were followed by earthquakes in
San Fernando, Southern California on February 9, 1971 (M 6.7) and October 15, 1979
in Baja California (M 7.0) respectively. Both occurred about a month after
the major Papua earthquake and were both highly damaging." (May 6, 2013)
This earthquake was followed by an upsurge in seismicity at 103-104 degrees from the epicenter
in Southern California which has included several events of M>=3. This is
expected to continue, however the moderate size of the PNG event is unlikely
to trigger moderate or strong events in southen California at this time.
The earthquake in New Guinea was followed less than a minute later by an M 4.8
in the northern Mid-Atlantic an earthquake of M 4.8. These events coincided
with the peak of a strong C-class solar flare - the strongest of the day and were
probably triggered by SFE from that flare.
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
5610 0741 0752 0802 C5.3 (April 10, 2025) 7.8E-04
New Guinea M 5.9 07:53 UT
North Atlantic M 4.8 07:54 UT
Durango, Mexico M 4.0 07:58 UT
Baja California M 3.4 08:02 UT
BMG (the local Indonesian Earthquake network) reported intensity up to V in the epicentral area near Agats and Kepi, PNG
near the coast. No damage or casualties had been announced nor were to be expected.
BMG reported the following data for this earthquake.
O: 10APR2025 07:53:26 5.9S 138.8E ML=5.9 BMG Asmat-Papuasltn, Indonesia
NEIC reported an earthquake of M 4.8 in Myanmar was felt with intensity up to IV in the area(s) of Myanmar at Sagaing.
EMSC reported moderate shaking in Myanmar at Thazi, Meiktila, Tatkon, Mandalay, Patheingyi, Pyinoolwin, Dagon Myothit, Hlaingthaya.
EMSC also reported an M 4.2 in Myanmar today was felt in Tada U, Sagaing, Chanmyathazi, Mandalay, Patheingyi, Pyinoolwin, Taunggyi.
NEIC reported an earthquake of M 4.6 in Northern Mariana Islands was felt with intensity up to II-III in the area(s) of Northern Mariana Islands in Tinian.
NEIC reported earthquakes of M 2.5, M 3.3, M 3.1, in Southern California were felt with intensity up to II-III in the area(s) of Southern California in Westmorland and San Diego (III) and Calipatria and Brawley (II) and Irvine.
An M 3.2 was also felt in southern California east of Los Angeles today. NEIC reported it was felt with intensity III in Desert Hot Springs, Rancho Mirage and Los Angeles with II in Walnut, Indio, Palm Desert, Joshua Tree, La Quinta, Palm Springs and Yucaipa.
NEIC reported an earthquake of M 3.3 in Kenai Peninsula, Alaska was felt with intensity up to II-III in the area(s) of Kenai Peninsula, Alaska with III in Homer and Soldotna and II in Kasilof and Sterling.
NEIC reported an earthquake of M 4.2 in El Salvador was felt with intensity up to II-III in the area(s) of El Salvador with III in Ilopango, San Salvador and II in Nuevo Cuscatlan La Libertad.
EMSC reported rapid shaking in San Salvador and Nueva San Salvador.
NEIC reported an earthquake of M 4.4 in Northern India was felt with intensity up to II-III in the area(s) of Northern India at Kukatpalle, Andhra Pradesh.
EMSC reported an earthquake of M 3.9 in Java, Indonesia was felt with intensity up to IV in the area(s) of Java, Indonesia with a loud noise at Bogor Selatan, Barat, Tengah, Timur, Sukaraja, Ciawi, Bogor Utara, Tanah Sareal, Tajur Halang, Cibinong, Cileungsi, Pamulang, Sefu, Bekasi, Jakarta, Kemayoran.
TROPICAL CYCLONE 29S
---- ------- ---------- -------- ----- ------ ------- ---------------
TC 29S 2025-04-11 00:00 UT 10.0S 129.4E 045 kts North of Australia
Tropical 29S formed today in the area north of Australia and south of the Banda Sea, Indonesia with winds up to 045 kts. It began near the epicenter of the M 5.5-5.9 in Papua New Guinea yesterday. It is likely to help promote seismicity in the Banda Sea in the next several days. The antipode of this epicenter is at 10N 51W, an area of little seismicity, But as it continued to track to the southwest the antipode will encounter the Leeward and Windward Islands of the eastern Caribbean. Should this storm continue it could enhance seismicity in that region around April 12-14, 2025.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
5580 0446 0450 0454 C2.3 (April 10, 2025) 1.1E-03
Ceram Sea M 4.2 04:55 UT
New Britain M 4.7 04:39 UT
5590 0624 0628 0632 C3.2 (April 10, 2025) 7.6E-04
Northern Peru M 4.2 06:24 UT
5600 0638 0643 0648 C3.1 (April 10, 2025) 1.9E-03
5610 0741 0752 0802 C5.3 (April 10, 2025) 7.8E-04
New Guinea M 5.9 07:53 UT
North Atlantic M 4.8 07:54 UT
Baja California M 3.4 08:02 UT
5630 0814 0818 0822 C2.7 (April 10, 2025) 1.3E-03
New Britain M 5.2 08:21 UT
5640 1022 1029 1046 C1.5 (April 10, 2025) 2.3E-03
Nicaragua M 3.8 10:33 UT
Guam M 4.6 10:17 UT
Los Lagos M 4.3 10:17 UT
5670 1638 1651 1708 C3.7 (April 10, 2025) 5.4E-03
Halmahera M 4.4 16:40 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: minor storms April 12 active April 11 and 13. Solar M-flare chance: 45% X-class: 5% proton storm: 5%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 17 30 11 07:00 6 112 153
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 11 21 36 2025 40.3 -120.4 2.7 HONEY LAKE CA M109 T78 R58 Z108 B92
04 11 20 56 2025 35.9 -117.6 2.0 LITTLE LAKE CA M114 T77 R59 Z106 B94
04 11 20 41 2025 -4.6 68.8 4.7 CHAGOS ARCHIPELAGO REGION" M37 T113 R100 Z91 B82
04 11 20 12 2025 -22.0 -68.7 4.3 NNE OF CALAMA CHILE M165 T95 R80 Z95 B131
04 11 18 25 2025 -6.3 150.4 4.4 KIMBE PAPUA NEW GUINEA M60 T37 R133 Z42 B1
04 11 18 20 2025 39.9 -120.8 2.3 SPRING GARDEN CA M109 T77 R58 Z108 B91
04 11 17 48 2025 31.7 -104.4 2.0 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 11 17 43 2025 31.6 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z111 B104
04 11 14 19 2025 16.4 -92.8 4.4 GUERRERO (EL CHICHONAL) MEXICO M140 T87 R59 Z109 B116
04 11 14 12 2025 35.3 -117.8 2.1 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 11 14 05 2025 -1.6 126.4 4.4 NE OF SANANA INDONESIA M37 T61 R125 Z56 B25
04 11 14 03 2025 33.9 -116.0 2.1 TWENTYNINE PALMS CA M116 T77 R60 Z106 B95
04 11 13 58 2025 33.9 -116.0 2.1 TWENTYNINE PALMS CA M116 T77 R60 Z106 B95
04 11 13 46 2025 -2.7 139.2 4.3 W OF ABEPURA INDONESIA M48 T48 R129 Z49 B12
04 11 11 37 2025 19.6 -65.4 3.4 VIEQUES PUERTO RICO M134 T113 R41 Z130 B141
04 11 11 34 2025 55.2 -157.2 3.1 KENAI ALASKA M81 T76 R63 Z106 B74
04 11 10 52 2025 23.9 91.2 4.3 NW OF AGARTALA INDIA M4 T102 R89 Z97 B66
04 11 10 26 2025 19.3 -65.8 3.1 SUáREZ PUERTO RICO M135 T112 R42 Z129 B141
04 11 09 57 2025 28.6 87.3 4.3 NE OF LOBUCHE NEPAL M10 T106 R83 Z103 B70
04 11 08 31 2025 40.2 -121.3 2.0 WSW OF ALMANOR CA M109 T77 R58 Z108 B91
04 11 08 02 2025 39.4 -119.6 2.4 NNE OF VIRGINIA CITY M110 T78 R58 Z108 B92
04 11 07 58 2025 44.4 -116.1 2.7 SMITHS FERRY IDAHO M107 T83 R53 Z113 B95
04 11 07 35 2025 41.1 -124.0 2.4 E OF WESTHAVEN-MOONSTONE CA M107 T76 R59 Z107 B89
04 11 06 56 2025 33.5 -116.5 2.2 ESE OF ANZA CA M116 T76 R60 Z105 B94
04 11 05 46 2025 29.3 130.5 4.5 S OF YUDOMARI JAPAN M31 T72 R96 Z82 B40
04 11 05 41 2025 29.2 130.5 4.6 S OF YUDOMARI JAPAN M31 T72 R97 Z82 B40
04 11 05 28 2025 37.2 -118.2 2.3 BIG PINE CA M112 T77 R59 Z107 B93
04 11 05 26 2025 1.5 127.5 4.3 WSW OF TOBELO INDONESIA M36 T61 R123 Z58 B25
04 11 05 15 2025 39.6 -123.0 2.3 LAKE PILLSBURY CA M108 T76 R60 Z106 B90
04 11 05 15 2025 29.2 130.6 4.4 S OF KOSHIMA JAPAN M32 T72 R97 Z82 B40
04 11 05 06 2025 29.2 130.4 5.0 NE OF TATSUGÅ JAPAN M31 T72 R97 Z82 B40
04 11 04 29 2025 20.9 96.0 4.8 MEIKTILA BURMA (MYANMAR) M1 T97 R93 Z92 B60
04 11 03 38 2025 -6.1 151.7 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 11 03 18 2025 18.9 145.5 4.9 REGION NORTHERN MARIANA ISLAND M46 T55 R108 Z67 B25
04 11 02 53 2025 33.2 -115.6 2.5 NW OF CALIPATRIA CA M117 T76 R60 Z106 B95
04 11 02 52 2025 33.2 -115.6 3.3 WNW OF CALIPATRIA CA M117 T76 R60 Z106 B95
04 11 02 42 2025 41.4 -112.2 2.2 W OF WILLARD UTAH M111 T83 R52 Z113 B98
04 11 02 28 2025 35.3 -117.8 2.0 WSW OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 11 02 26 2025 31.9 -103.8 2.1 NW OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 11 01 57 2025 56.6 -155.9 3.2 SOUTHERN ALASKA M81 T78 R61 Z107 B75
04 11 01 30 2025 31.5 -115.6 2.1 OVIEDO MOTA B.C. MX M118 T75 R61 Z105 B95
04 11 00 19 2025 18.9 -66.5 3.2 NUEVAS PONIENTE PUERTO RICO M135 T112 R43 Z129 B140
04 10 23 59 2025 24.0 122.5 4.3 SW OF YONAKUNI JAPAN M24 T75 R100 Z80 B41
04 10 23 05 2025 35.3 -117.8 2.0 W OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 10 20 40 2025 60.0 -151.5 3.3 SOUTHERN ALASKA M81 T82 R57 Z111 B79
04 10 19 35 2025 13.1 -89.1 4.2 EL ROSARIO EL SALVADOR M144 T89 R59 Z109 B119
04 10 18 23 2025 44.3 -115.2 2.3 WNW OF STANLEY IDAHO M108 T83 R52 Z114 B96
04 10 18 13 2025 36.9 -121.6 2.1 ENE OF AROMAS CA M111 T75 R61 Z105 B90
04 10 17 16 2025 -8.0 158.5 4.9 BUALA SOLOMON ISLANDS M68 T29 R134 Z39 B7
04 10 16 40 2025 3.1 128.5 4.4 NNE OF TOBELO INDONESIA M36 T61 R122 Z59 B24
04 10 16 25 2025 36.5 -121.1 2.0 SE OF PINNACLES CA M112 T75 R61 Z105 B91
04 10 16 22 2025 38.9 -123.3 2.1 SSE OF BOONVILLE CA M109 T75 R60 Z106 B89
04 10 16 17 2025 21.7 95.9 3.9 SAGAING BURMA (MYANMAR) M0 T97 R93 Z92 B61
04 10 16 15 2025 36.5 -121.1 2.3 SE OF PINNACLES CA M112 T75 R61 Z105 B91
04 10 16 10 2025 34.0 -116.8 2.1 N OF CABAZON CA M116 T76 R60 Z106 B94
04 10 16 01 2025 13.2 50.7 4.3 N OF CALUULA SOMALIA M43 T136 R75 Z116 B102
04 10 15 46 2025 36.4 -89.5 2.1 NW OF TIPTONVILLE TENNESSEE M121 T97 R42 Z124 B116
04 10 15 42 2025 1.6 127.1 4.3 NNW OF TERNATE INDONESIA M36 T61 R123 Z58 B25
04 10 15 40 2025 -22.3 -71.6 4.3 W OF TOCOPILLA CHILE M168 T93 R82 Z93 B129
04 10 13 38 2025 33.9 -116.2 3.2 THOUSAND PALMS CA M116 T76 R60 Z106 B95
04 10 13 35 2025 35.9 77.9 4.4 NE OF THANG INDIA M20 T116 R72 Z113 B80
04 10 12 49 2025 33.2 -115.6 3.1 WNW OF CALIPATRIA CA M117 T76 R60 Z106 B95
04 10 12 26 2025 33.2 -115.6 2.5 SW OF NILAND CA M117 T76 R60 Z106 B95
04 10 12 09 2025 51.6 -175.2 3.5 ANDREANOF ISLANDS, ALASKA M72 T71 R71 Z99 B63
04 10 10 17 2025 12.1 143.5 4.6 MERIZO VILLAGE GUAM M46 T52 R115 Z61 B19
04 10 10 16 2025 -39.6 -74.9 4.3 WNW OF CORRAL CHILE M160 T83 R99 Z78 B117
04 10 08 55 2025 33.2 -115.6 2.7 SW OF NILAND CA M117 T76 R60 Z106 B95
04 10 08 27 2025 40.2 -124.7 2.8 W OF PETROLIA CA M107 T75 R60 Z106 B88
04 10 08 20 2025 -6.3 151.3 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 10 08 09 2025 18.9 -64.3 3.2 BAY U.S. VIRGIN ISLANDS M134 T114 R42 Z130 B142
04 10 07 54 2025 29.7 -42.6 4.8 NORTHERN MID-ATLANTIC RIDGE" M114 T135 R24 Z152 B152
04 10 07 53 2025 -5.9 138.8 5.9 PAPUA NEW GUINEA, INDONESIA M50 T48 R132 Z46 B12
04 10 07 53 2025 -5.9 138.7 5.5 SE OF AGATS INDONESIA M50 T48 R132 Z46 B12
04 10 06 47 2025 35.6 -84.4 1.6 ENE OF SWEETWATER TENNESSEE M122 T101 R40 Z127 B120
04 10 06 36 2025 17.9 -68.5 3.4 DE YUMA DOMINICAN REPUBLIC M137 T110 R44 Z127 B139
04 10 06 35 2025 31.7 -104.4 2.4 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 10 06 35 2025 31.7 -104.4 2.3 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 10 06 24 2025 -6.1 -75.8 4.3 N OF NAVARRO PERU M162 T95 R69 Z104 B131
04 10 05 26 2025 -29.5 -112.3 5.1 EASTER ISLAND REGION" M153 T56 R107 Z63 B92
04 10 05 24 2025 33.3 -115.7 2.4 BOMBAY BEACH CA M117 T76 R60 Z106 B95
04 10 05 16 2025 51.7 -178.2 3.9 ANDREANOF ISLANDS, ALASKA M70 T71 R72 Z98 B62
04 10 05 12 2025 29.0 86.6 4.1 N OF LOBUCHE NEPAL M10 T107 R82 Z103 B71
04 10 04 39 2025 -6.4 151.4 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 10 04 36 2025 52.0 -167.8 3.8 SE OF NIKOLSKI ALASKA M76 T72 R69 Z100 B67
04 10 03 11 2025 18.4 -64.7 3.3 BAY U.S. VIRGIN ISLANDS M135 T113 R42 Z129 B142
04 10 02 48 2025 36.6 -121.1 2.1 NNE OF PINNACLES CA M112 T75 R61 Z105 B91
04 10 02 43 2025 -6.3 151.4 5.4 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 10 02 04 2025 14.5 -92.9 4.1 PUERTO MADERO MEXICO M142 T86 R60 Z107 B116
04 10 02 00 2025 40.4 -124.0 2.3 RIO DELL CA M107 T76 R60 Z106 B89
04 10 01 43 2025 36.0 -117.7 3.5 E OF LITTLE LAKE M114 T77 R59 Z106 B93
04 10 01 41 2025 31.7 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 10 01 40 2025 31.7 -104.4 2.1 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 10 01 13 2025 36.9 141.3 4.3 ESE OF IWAKI JAPAN M41 T70 R90 Z86 B43
04 10 01 09 2025 31.7 -104.2 2.0 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 10 00 48 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
April 10, 2025
The strongest earthquake in the world today was an M 5.5 (NEIC, EMSC) to M 5.9 (BMG) in Papua New Guinea. NEIC reported it was felt with intensity II in Kiunga Fly River, PNG.
The last earthquake in New Guinea within about 250 km of this epicenter with M>=5.9
occurred on December 30, 2023 with M 6.5 and prior to that as an M 5.9 on January 12, 2021.
Nearly all the major or moderate earthquakes in PNG in this area occur
about 200 km north of today's epicenter. There have been no earthquakes
of M>=5.9 recorded within about 200 km of today's epicenter in the past 35 years.
An M 7.0 did occur on April 6, 2013 about 200 km north of today's epicenter.
At the time this summary noted:
"The strong earthquake of M 7.0-7.3 in Papua New Guinea was felt with intensity
V in Mulia, IV in Tanah Merah, Sentani, Wamena, Jayapura, Genyem, Mamberamo,
III-IV in Sarmi, and Waropen and III in Merauke, Mapi and II in Timika,
New Guinea according to data from the local network - BMG. NEIC reported
intensity III in Aberpura, Papua, Indonesia. No tsunami was observed
or expected with this earthquake and the quake epicenter was on land but panicked crowds in eastern Papua
rushed into the streets. Slight damage is expected in the mountainous
areas but this has not yet been reported. The last strong earthquake in
this general area of New Guinea occurred as an M 7.0 on June 16, 2010.
This event was about 300 km northwest of today's epicenter.
The Los Angeles area of Southern California is located at 103 degrees from
this epicenter in New Guinea. Several light earthquake occurred in that area
today. Seismic energy is concentrated at this distance following major earthquakes
due to refraction and reflection off the core-mantle boundary to this
distance zone. Seismicity is often seen to increase at this distance following
major earthquakes. For example, the two great earthquake in this area of
Papua New Guinea in the past 50 years occurred on January 10, 1971 (M 8.1)
and on September 12, 1979 (M 8.0). These were followed by earthquakes in
San Fernando, Southern California on February 9, 1971 (M 6.7) and October 15, 1979
in Baja California (M 7.0) respectively. Both occurred about a month after
the major Papua earthquake and were both highly damaging." (May 6, 2013)
This earthquake was followed by an upsurge in seismicity at 103-104 degrees from the epicenter
in Southern California which has included several events of M>=3. This is
expected to continue, however the moderate size of the PNG event is unlikely
to trigger moderate or strong events in southen California at this time.
The earthquake in New Guinea was followed less than a minute later by an M 4.8
in the northern Mid-Atlantic an earthquake of M 4.8. These events coincided
with the peak of a strong C-class solar flare - the strongest of the day and were
probably triggered by SFE from that flare.
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0730 0753 0810 C6.0 (April 10, 2025) 1.5E-03
Papua New Guinea M 5.5 07:53 UT
Northern Mid-Atlantic M 4.8 07:54 UT
Durango, Mexico M 4.0 07:58 UT
BMG (the local Indonesian Earthquake network) reported intensity up to V in the epicentral area near Agats and Kepi, PNG
near the coast. No damage or casualties had been announced nor were to be expected.
BMG reported the following data for this earthquake.
O: 10APR2025 07:53:26 5.9S 138.8E ML=5.9 BMG Asmat-Papuasltn, Indonesia
The strongest earthquakes in the U.S. or Canada today were an M 3.9 and M 3.8 in the Fox
Islands, Aleutians, Alaska. It was not reported felt in this remote area but may have been felt with intensity II in the Nikolski, Alaska area.
Aftershocks also continued in the area of New Britain following the M 6.9 there
of April 4, 2025. The largest of these was an M 5.4 which NEIC reported was likely felt with intensity IV in the epicentral area near Kimbe, Papua New Guinea.
NEIC reported an earthquake of M 3.5 in Central California was felt with intensity up to II-III in the area(s) of Central California in Onyx.
NEIC reported earthquakes of M 4.3 and M 4.5 off eastern Honshu, Japan were felt with intensity up to II-III in the area(s) of Honshu, Japan in Aomori Prefecture.
NEIC reported an earthquake of M 3.1 in Central Alaska was felt with intensity up to II-III in the area(s) of Central Alaska at Talkeetna.
No tropical cyclones are currently active
A tropical cyclone may be forming in the Banda Sea, Indonesia. This system is currently
locat at 8S 130E and moving to the southwest with winds up to 30 kts. It began near the
epicenter of the M 5.5 in Papua New Guinea yesterday. It is likely to help
promote seismicity in the Banda Sea in the next several days. The antipode
of this epicenter is at 9N 50W, an area of little seismicity, But as it
continued to track to the southwest the antipode will encounter the Leeward
and Windward Islands of the eastern Caribbean. Should this storm continue
it could enhance seismicity in that region around April 12-14, 2025.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
XXXX 0730 0755 0810 C6.0 (April 10, 2025) 1.5E-03
Papua New Guinea M 5.5 07:53 UT
Northern Mid-Atlantic M 4.8 07:54 UT
Durango, Mexico M 4.0 07:58 UT
Baja California M 3.4 08:02 UT
5370 0102 0109 0117 C1.9 (April 9, 2025) 1.2E-03
5380 0131 0143 0153 C3.8 (April 9, 2025) 4.2E-03
Tawan M 5.8 01:53 UT
5390 0516 0527 0534 C3.3 (April 9, 2025) 2.6E-03
5420 0832 0845 0857 C2.2 (April 9, 2025) 1.1E-03
New Britain M 5.0 08:45 UT
Myanmar M 4.0 08:47 UT
Nevada M 2.0 08:41 UT
5430 0933 0949 1002 C2.5 (April 9, 2025) 4.2E-03
5460 1053 1103 1115 C2.2 (April 9, 2025) 2.7E-03
Michoacan M 4.1 11:15 UT
5470 1216 1231 1244 C2.7 (April 9, 2025) 5.8E-04
Colombia M 4.2 12:41 UT
5490 1456 1505 1510 C2.1 (April 9, 2025) 1.3E-03
5530 1722 1730 1737 C9.0 (April 9, 2025) 4.8E-03
Fiji M 4.9 17:25 UT
Myanmar M 3.5 17:25 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: unsettled April 10 active April 11-12. Solar M-flare chance: 45% X-class: 5% proton storm: 5%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 22 44 20 08:00 6 113 167
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of M 7.7 of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.0 (M)4.0 for the world) during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 10 14 38 2025 38.5 -122.8 2.1 KM ESE OF WINDSOR M109 T75 R60 Z105 B90
04 10 13 38 2025 33.9 -116.2 3.2 THOUSAND PALMS CA M116 T76 R60 Z106 B95
04 10 13 35 2025 35.9 77.9 4.4 NE OF THANG INDIA M20 T116 R72 Z113 B80
04 10 12 49 2025 33.2 -115.6 3.0 WNW OF CALIPATRIA CA M117 T76 R60 Z106 B95
04 10 12 26 2025 33.2 -115.6 2.5 SW OF NILAND CA M117 T76 R60 Z106 B95
04 10 10 16 2025 -39.6 -74.9 4.3 WNW OF CORRAL CHILE M160 T83 R99 Z78 B117
04 10 08 55 2025 33.2 -115.6 2.7 SW OF NILAND CA M117 T76 R60 Z106 B95
04 10 08 27 2025 40.2 -124.7 2.8 W OF PETROLIA CA M107 T75 R60 Z106 B88
04 10 08 20 2025 -6.3 151.3 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 10 08 09 2025 18.9 -64.3 3.2 BAY U.S. VIRGIN ISLANDS M134 T114 R42 Z130 B142
04 10 07 54 2025 29.7 -42.6 4.8 NORTHERN MID-ATLANTIC RIDGE" M114 T135 R24 Z152 B152
04 10 07 53 2025 -5.9 138.8 5.9 ASMAT-PAPUASLTN, INDONESIA M50 T48 R132 Z46 B12
04 10 07 53 2025 -5.9 138.7 5.5 SE OF AGATS INDONESIA M50 T48 R132 Z46 B12
04 10 06 36 2025 17.9 -68.5 3.4 DE YUMA DOMINICAN REPUBLIC M137 T110 R44 Z127 B139
04 10 06 24 2025 -6.1 -75.8 4.3 N OF NAVARRO PERU M162 T95 R69 Z104 B131
04 10 05 26 2025 -29.5 -112.3 5.1 EASTER ISLAND REGION" M153 T56 R107 Z63 B92
04 10 05 12 2025 29.0 86.6 4.1 N OF LOBUCHE NEPAL M10 T107 R82 Z103 B71
04 10 04 39 2025 -6.4 151.4 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 10 04 36 2025 52.0 -167.8 3.8 SE OF NIKOLSKI ALASKA M76 T72 R69 Z100 B67
04 10 03 11 2025 18.4 -64.7 3.3 BAY U.S. VIRGIN ISLANDS M135 T113 R42 Z129 B142
04 10 02 48 2025 36.6 -121.1 2.1 NNE OF PINNACLES CA M112 T75 R61 Z105 B91
04 10 02 43 2025 -6.3 151.4 5.4 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 10 02 04 2025 14.5 -92.9 4.1 PUERTO MADERO MEXICO M142 T86 R60 Z107 B116
04 10 02 00 2025 40.4 -124.0 2.3 RIO DELL CA M107 T76 R60 Z106 B89
04 10 01 43 2025 36.0 -117.7 3.5 E OF LITTLE LAKE M114 T77 R59 Z106 B93
04 10 01 41 2025 31.7 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 10 01 40 2025 31.7 -104.4 2.0 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 10 01 28 2025 33.4 -116.7 2.1 WARNER SPRINGS CA M116 T76 R61 Z105 B94
04 10 01 13 2025 36.9 141.3 4.3 ESE OF IWAKI JAPAN M41 T70 R90 Z86 B43
04 10 01 09 2025 31.7 -104.2 2.0 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 10 00 48 2025 31.7 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 9 23 33 2025 39.2 141.8 4.5 SSW OF KAMAISHI JAPAN M42 T72 R88 Z88 B45
04 9 21 21 2025 38.2 -116.0 2.2 KM NNW OF RACHEL M113 T79 R57 Z109 B95
04 9 21 21 2025 32.4 -102.1 2.4 LOS YBANEZ TEXAS M123 T86 R53 Z113 B106
04 9 20 46 2025 -7.6 128.2 4.5 LOSPALOS TIMOR LESTE M43 T57 R132 Z50 B23
04 9 20 42 2025 -22.1 69.0 5.3 MID-INDIAN RIDGE" M51 T105 R113 Z78 B81
04 9 20 41 2025 31.6 -104.2 1.7 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 9 20 13 2025 52.0 -171.1 3.9 SW OF NIKOLSKI ALASKA M74 T72 R70 Z100 B65
04 9 19 56 2025 34.5 9.6 4.4 WSW OF MEZZOUNA TUNISIA M74 T165 R34 Z158 B134
04 9 19 08 2025 -6.6 151.2 4.3 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 9 18 10 2025 52.2 -171.2 3.4 FOX ISLANDS, ALASKA M74 T72 R69 Z100 B66
04 9 18 01 2025 62.6 -149.8 3.1 CENTRAL ALASKA M81 T84 R55 Z114 B81
04 9 17 25 2025 -25.9 -178.8 4.9 THE FIJI ISLANDS M95 T7 R143 Z24 B34
04 9 17 20 2025 49.4 -120.5 2.3 SSE OF PRINCETON CANADA M101 T83 R52 Z114 B93
04 9 16 55 2025 45.9 -111.5 2.2 LOGAN MONTANA QUARRY M107 T86 R49 Z117 B99
04 9 16 37 2025 38.8 -122.8 2.2 WNW OF COBB CA M109 T75 R60 Z106 B90
04 9 16 05 2025 38.3 -119.4 2.8 NW OF BRIDGEPORT CA M111 T77 R59 Z107 B92
04 9 15 59 2025 21.7 96.0 3.5 KYAUKSE BURMA (MYANMAR) M0 T97 R93 Z92 B61
04 9 15 21 2025 3.5 127.4 5.0 NNW OF TOBELO INDONESIA M35 T62 R121 Z60 B26
04 9 14 40 2025 21.4 95.9 3.6 KYAUKSE BURMA (MYANMAR) M0 T97 R93 Z92 B61
04 9 14 15 2025 -6.2 150.7 4.3 KIMBE PAPUA NEW GUINEA M60 T37 R133 Z42 B1
04 9 14 01 2025 31.5 -104.0 2.5 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 9 12 52 2025 -0.1 126.0 4.3 WNW OF LABUHA INDONESIA M36 T62 R124 Z58 B26
04 9 12 41 2025 4.5 -75.6 4.2 S OF CALARCá COLOMBIA M152 T99 R59 Z112 B132
04 9 12 39 2025 31.7 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 9 12 13 2025 35.4 -117.8 2.3 W OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 9 10 31 2025 -23.1 -66.8 4.4 EL AGUILAR ARGENTINA M163 T96 R81 Z95 B132
04 9 09 49 2025 18.6 -66.1 3.0 SAN JUAN PUERTO RICO M135 T112 R43 Z129 B141
04 9 08 44 2025 -6.1 151.0 5.0 KIMBE PAPUA NEW GUINEA M60 T36 R133 Z42 B0
04 9 08 29 2025 -6.2 151.5 5.0 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 9 07 58 2025 22.8 95.9 4.7 SHWEBO BURMA (MYANMAR) M0 T97 R92 Z93 B61
04 9 07 39 2025 8.1 -38.1 5.3 CENTRAL MID-ATLANTIC RIDGE" M125 T135 R44 Z136 B170
04 9 07 25 2025 3.5 127.2 4.9 NNW OF TOBELO INDONESIA M35 T62 R121 Z60 B26
04 9 06 21 2025 27.9 139.7 4.5 BONIN ISLANDS JAPAN REGION" M39 T65 R99 Z77 B35
04 9 05 48 2025 38.8 -122.7 2.1 THE GEYSERS CA M109 T75 R60 Z106 B90
04 9 03 09 2025 40.0 39.5 4.1 SSE OF KELKIT TURKEY M50 T145 R49 Z141 B110
04 9 03 06 2025 36.5 -89.6 1.9 NNE OF MARSTON MISSOURI M121 T97 R42 Z124 B116
04 9 02 42 2025 -20.1 -178.0 4.4 FIJI REGION" M93 T3 R138 Z29 B32
04 9 01 53 2025 24.6 121.9 5.0 SSE OF YILAN TAIWAN M24 T76 R99 Z81 B42
04 9 01 53 2025 24.6 121.8 5.8 NORTHERN TAIWAN M23 T76 R99 Z81 B42
04 9 00 58 2025 -35.1 -73.9 4.5 W OF CONSTITUCIóN CHILE M164 T86 R94 Z82 B120
04 9 00 10 2025 39.2 142.3 4.1 E OF KAMAISHI JAPAN M42 T71 R88 Z88 B45
04 9 00 00 2025 38.2 -118.0 2.8 KM SSE OF MINA M112 T78 R58 Z108 B93
April 9, 2025
Two moderate earthquake of M 5.4-5.9 occurred today off northeastern Taiwan in the Ryukyu Islands, Japan. NEIC reported they were felt with intensity IV in Taiwan at Taipei, Hsinchu, with III in Ilan, Taipei, Changhwa, Chiayi, and II in Taichung and Kaohsiung.
The last earthquake in Taiwan reported by CWB with M>=5.8 within about 200 km of today's
epicenter occurred as an M 5.9 on October 23, 2023. A major earthquake of M 7.4
about 250 km southwest of today's epicenter did considerable damage in
Taiwan a year ago on April 2, 2024 and was partially reported in this summary at
the time as:
"A major M 7.4 earthquake damaged much of the Island of Taiwan today. International Press reports indicated that this event and several
strong aftershocks killed at least 7 while injuring more than 700. The quake
occurred about 20 km south of Hualien and damaged and toppled buildings while
causing many damaging landslides. It is the strongest earthquake to hit
Taiwan in at least 25 years - since September 20, 1999 (M 7.7) - the strongest
event in Taiwan in the past 35 years. Major earthquakes have most recently
hit with M>=7.5 in Taiwan on November 14, 1986 (M 7.8); July 24, 1978 (M 8.0); April 24, 1972 (M 7.7) and January 25, 1972 (M 7.7)." (April 2, 2024)
CWB out of Taiwan reported it at M 5.9 with the following parameters:
O: 08APR2025 15:26:35 24.5N 123.2E ML=5.9 CWB Off Northern Taiwan
CWB reported it was felt with intensity III in the counties of Taiwan at Hualien, and II in Yilan, Taipei, Taoyuan, Nantou, Taichung, Hsinchu, Miaoli, Taitung, Chiayi, Yunlin.
A second earthquake of M 5.8 was felt in a similar area. CWB gave this event
the following parameters:
O: 09APR2025 01:53:25 24.6N 121.8E ML=5.8 CWB Northern Taiwan
NEIC reported an earthquake of M 4.1 in Eastern Turkey was felt with intensity up to II-III in the area(s) of Eastern Turkey at Erzincan.
NEIC reported an earthquake of M 5.0 in Northern Chile was felt with intensity up to II-III in the area(s) of Northern Chile in Iquique, Tarapaca.
This event appears to have been triggered by SFE from a solar flare which
maximized at the time of the earthquake.
An M 3.8 also occurred south of Hawaii today. It is likely to have felt lightly in southern Hawaii and in the Lo'ihi Seamount area but this was note confirmed.
It was preceded by smaller events of M 3.0 and M 3.1.
NEIC reported earthquakes of M 2.5 and M 2.9 in Nevada were felt with intensity up to II-III in the area(s) of Nevada at Ridgecrest, California.
NEIC reported an earthquake of M 4.4 southwest of Honshu, Japan was felt with intensity up to II-III in the area(s) of Honshu, Japan with III in Anjo, and Nagakute, Aichi and in Kakamigahara, Gifu and Hamamatsu, Shizuoka.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
5160 0502 0514 0525 C2.4 (April 8, 2025) 2.9E-03
Myanmar M 4.3 05:19 UT
5170 0541 0603 0624 C3.0 (April 8, 2025) 6.7E-03
Banda Sea M 4.5 05:40 UT
Guatemala M 4.0 05:58 UT
5250 1401 1407 1410 C1.7 (April 8, 2025) 9.5E-04
Oaxaca M 4.1 14:01 UT
Dominican Republic M 3.4 14:06 UT
5290 1939 1946 1953 C2.7 (April 8, 2025) 1.1E-03
5310 2045 2058 2107 C3.2 (April 8, 2025) 8.8E-04
New Britain M 4.6 20:53 UT
Argentina M 4.4 21:13 UT
5330 2208 2222 2236 M1.5 (April 8, 2025) 1.5E-02
Fiji M 4.6 22:11 UT
Chiapas M 3.9 22:14 UT
Antofagasta M 5.0 22:30 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: minor storms April 9 active April 10-11. Solar M-flare chance: 40% X-class: 5% proton storm: 5%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 24 30 20 17:00 6 130 159
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and from Myanmar of March 29 (white stipples) and earthquakes during the past day as reported by NEIC (colored circles).
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 9 12 39 2025 31.7 -104.4 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 9 12 13 2025 35.4 -117.8 2.3 W OF JOHANNESBURG CA M114 T76 R60 Z106 B93
04 9 10 31 2025 -23.1 -66.8 4.4 EL AGUILAR ARGENTINA M163 T96 R81 Z95 B132
04 9 09 49 2025 18.6 -66.1 3.0 SAN JUAN PUERTO RICO M135 T112 R43 Z129 B141
04 9 08 44 2025 -6.1 151.0 5.0 KIMBE PAPUA NEW GUINEA M60 T36 R133 Z42 B0
04 9 08 29 2025 -6.2 151.5 5.0 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 9 07 58 2025 22.8 95.9 4.7 SHWEBO BURMA (MYANMAR) M0 T97 R92 Z93 B61
04 9 07 39 2025 8.1 -38.1 5.3 CENTRAL MID-ATLANTIC RIDGE" M125 T135 R44 Z136 B170
04 9 07 25 2025 3.5 127.2 4.9 NNW OF TOBELO INDONESIA M35 T62 R121 Z60 B26
04 9 06 21 2025 27.9 139.7 4.5 BONIN ISLANDS JAPAN REGION" M39 T65 R99 Z77 B35
04 9 05 48 2025 38.8 -122.7 2.1 THE GEYSERS CA M109 T75 R60 Z106 B90
04 9 03 09 2025 40.0 39.5 4.1 SSE OF KELKIT TURKEY M50 T145 R49 Z141 B110
04 9 02 42 2025 -20.1 -178.0 4.4 FIJI REGION" M93 T3 R138 Z29 B32
04 9 01 53 2025 24.6 121.9 5.0 SSE OF YILAN TAIWAN M24 T76 R99 Z81 B42
04 9 01 53 2025 24.6 121.8 5.8 NORTHERN TAIWAN M23 T76 R99 Z81 B42
04 9 00 10 2025 39.2 142.3 4.1 E OF KAMAISHI JAPAN M42 T71 R88 Z88 B45
04 9 00 00 2025 38.2 -118.0 2.8 KM SSE OF MINA M112 T78 R58 Z108 B93
04 8 22 41 2025 34.0 -117.2 2.0 LOMA LINDA CA M116 T76 R60 Z105 B94
04 8 22 37 2025 28.9 -99.0 2.8 NORTH PEARSALL TEXAS M127 T87 R53 Z113 B109
04 8 22 30 2025 -21.1 -68.4 5.0 NNW OF OLLAGüE CHILE M165 T96 R79 Z96 B132
04 8 22 10 2025 -18.1 -179.7 4.6 E OF LEVUKA FIJI M91 T5 R137 Z30 B30
04 8 21 13 2025 -24.4 -67.5 4.4 DE LOS COBRES ARGENTINA M164 T95 R82 Z94 B131
04 8 19 30 2025 36.0 -117.5 2.5 SEARLES VALLEY CA M114 T77 R59 Z107 B94
04 8 19 25 2025 4.7 125.1 5.0 SSW OF SARANGANI PHILIPPINES M33 T64 R119 Z62 B28
04 8 16 28 2025 5.7 126.6 4.3 SSE OF PONDAGUITAN PHILIPPINES M33 T63 R119 Z62 B27
04 8 15 26 2025 24.9 123.1 5.4 N OF YONAKUNI JAPAN M25 T75 R99 Z81 B41
04 8 15 26 2025 24.5 123.2 5.9 OFF NORTHERN TAIWAN M25 T75 R100 Z80 B41
04 8 14 50 2025 31.7 -104.3 2.5 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 8 13 02 2025 10.6 -86.0 4.4 TAMARINDO COSTA RICA M147 T91 R60 Z109 B122
04 8 12 55 2025 -6.1 151.6 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 8 12 13 2025 -6.3 151.3 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 8 11 30 2025 -20.3 -105.2 5.2 SOUTHEAST CENTRAL PACIFIC OCEA M160 T63 R96 Z74 B100
04 8 11 29 2025 -6.3 152.3 4.9 KOKOPO PAPUA NEW GUINEA M61 T35 R133 Z41 B0
04 8 10 28 2025 -17.9 -69.7 4.8 ESE OF PALCA PERU M165 T96 R77 Z98 B132
04 8 10 26 2025 34.9 137.1 4.4 ENE OF NISHIO JAPAN M38 T71 R92 Z85 B42
04 8 09 49 2025 19.5 -65.3 3.7 VIEQUES PUERTO RICO M134 T113 R41 Z130 B141
04 8 09 41 2025 40.5 -119.8 2.2 KM W OF EMPIRE M109 T78 R57 Z109 B92
04 8 09 30 2025 7.1 126.5 4.5 SAN IGNACIO PHILIPPINES M33 T64 R117 Z64 B28
04 8 08 43 2025 -17.0 -72.7 4.2 S OF CAMANá PERU M168 T94 R77 Z97 B130
04 8 08 43 2025 18.9 -155.2 3.5 ESE OF NAALEHU HAWAII M99 T43 R93 Z74 B57
04 8 07 59 2025 18.8 -155.2 3.7 ESE OF NAALEHU HAWAII M99 T42 R93 Z73 B57
04 8 07 36 2025 -14.1 170.5 4.6 VANUATU REGION" M81 T16 R137 Z32 B20
04 8 06 51 2025 34.0 -117.2 2.1 MORENO VALLEY CA M116 T76 R60 Z105 B94
04 8 06 25 2025 36.6 -89.6 1.8 WSW OF HOWARDVILLE MISSOURI M121 T97 R42 Z124 B116
04 8 05 52 2025 36.6 -121.3 2.1 NNW OF PINNACLES CA M111 T75 R61 Z105 B91
04 8 05 40 2025 -6.7 129.9 4.5 BANDA SEA" M43 T56 R131 Z50 B21
04 8 04 35 2025 0.7 123.8 4.7 WNW OF MODISI INDONESIA M34 T64 R123 Z59 B28
04 8 03 55 2025 0.7 -29.6 5.3 CENTRAL MID-ATLANTIC RIDGE" M122 T140 R51 Z132 B174
04 8 02 52 2025 66.2 -135.4 3.4 YUKON, CANADA M83 T90 R48 Z121 B88
04 8 02 23 2025 -6.0 128.1 4.1 S OF AMBON INDONESIA M42 T57 R130 Z52 B23
04 8 01 37 2025 -11.5 166.2 4.7 LATA SOLOMON ISLANDS M76 T21 R136 Z35 B15
April 8, 2025
The strongest earthquake in the world today was an M 5.8 (NEIC, EMSC) to 6.2 (BMG) in the region of Simeulue, Indonesia west of Sumatra. NEIC reported it was felt with intensity II in Sungai Ara Pulau, Pinang, Malaysia.
The last earthquake of M>=5.8 within about 200 km of this epicenter occurred
as an M 5.9 on May 28, 2024, the last of M>=6.2 was an M 6.3 on March 29, 2008.
At the time of the May, 2024 event this summary noted:
"The strongest earthquake in the world today was an M 5.9 in the region of northern
Sumatra, Indonesia. This earthquake in Simuelue, Indonesia west of Sinabang, Indonesia is the
strongest event within about 200 km of this epicenter since an M 6.2 on September 23, 2022 and
a similar M 6.2 on January 7, 2020 and an M 5.9 on May 8, 2015. These appear to
be long-term aftershocks of the M 9+ earthquake and tsunami of December 26, 2004
which killed more than a quarter million around the Indian Ocean in the
earthquake and subsequent tsunami. At the time of the M 6.2 in September, 2022
this summary noted:
"An earthquake of M 6.2 was also widely felt in the area of Northern Sumatra and Malaysia today. NEIC reported intensity II-III in Banda Aceh, Indonesia, in Malaysia at Georgetown Pulau, Butterworth, Perai, and in Thailand at Phuket and Kathu.
BMG reported this earthquake with M 6.4 at 3.8N 96E. They reported maximum intensity IV in Aceh Selatan and Nagan Raya, Meulaboh, III in Aceh Besar, Banda Aceh, Takengon, Bener Meriah, Simeulue and II in Pidie, Idi, Bireun, Aceh Tamiang, and Lansa.
A foreshock about 100 km north of the M 6.4 occurred about half an hour prior
to the mainshock. BMG reported it was felt with intensity IV in Takengon, Bener Meriah, and III in Idi, Reyeuk-Aceh, Timur and Aceh Barat Daya.
While an M 5.9 occurred about 100 km west of this epicenter on March 5, 2022,
the last earthquake within about 250 km of this epicenter with M>=6.2 per NEIC data
was an 6.2 about 200 km southeast of today's epicenter on January 7, 2020 and an M 6.5 about 200
km north of this on December 6, 2016. The last definitely within the 200 km
radius zone was an M 6.4 on July 25, 2012. This followed a major event ofr
M 8.6 about 300 km southwest of today's epicenter on April 11, 2012." (September 23, 2022, May 28, 2024)
The Antipode to this event is located at 2S 85W west of Ecuador and east of
the Galapagos Islands. Regional seismicity in this area could be enhanced
in the next several days, but the likelihood of a strong event in this
area promoted by the event in Sumatra today is small at this time.
This epicenter is located at 90.0 degrees (node 4) from the M 7.1 in Tonga of March 30
and was likely promoted by energy from that source.
BMG, the local network gave the following parameters for this earthquake:
O: 07APR2025 19:48:52 2.8N 94.7E ML=6.2 BMG Sinabang-Aceh, Indonesia
The strongest earthquake in the U.S. or Canada today was an M 4.5 in the central Andreanof Islands, Alaska. It may have been lightly felt in this remote area.
This epicenter is at the fifth node (72 degrees) from recent major earthquakes
in Myanmar, Tonga and the Reykjanes Ridge and was probably promoted by
constructive interference of energy from those three sources.
NEIC reported an earthquake of M 2.6 in Southern California was felt with intensity up to II-III in the area(s) of Southern California at Indio, Indian Wells and La Quinta.
An M 3.8 also occurred south of Hawaii today. It is likely to have felt lightly in southern Hawaii and in the Lo'ihi Seamount area but this was note confirmed.
It was preceded by smaller events of M 3.0 and M 3.1.
NEIC reported an earthquake of M 3.5 in Western Arizona was felt with intensity up to II-III in the area(s) of Western Arizona with III in Nevada at Henderson; II at Mesquite and Las Vegas.
A moderate M 5.3 hit the northern Marianas Islands north of Guam today. NEIC reported it was felt with maximum intensity IV in the Northern Marianas at Gualo Rai and Garapan, Saipan and in Tinian with III and with III in Guam at Tamuning and Santa Rita.
Moderate earthquakes also continued today as aftershocks in New Britain. The larger
of these around M 5.2 were probably felt in Kimbe and Port Moresby with light intensity.
A minor eruption of Mount Kanlaon in Central Philippines occurred today. It
lasted several hours and is part of an ongoing eruptive sequence in the area.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
4890 0641 0648 0653 C2.7 (April 7, 2025) 1.7E-03
New Britain M 4.6 06:55 UT
5030 1456 1505 1509 C3.0 (April 7, 2025) 1.2E-03
Fiji M 4.5 15:02 UT
5070 1509 1523 1528 C3.4 (April 7, 2025) 4.2E-03
Peru M 4.4 15:24 UT
5060 1528 1536 1546 C5.3 (April 7, 2025) 9.4E-04
New Britain M 5.0 15:28 UT
5040 1741 1747 1751 C2.3 (April 7, 2025) 1.3E-03
5090 2005 2017 2031 C2.4 (April 7, 2025) 3.4E-03
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 8 unsettled April 9-10. Solar M-flare chance: 55% X-class: 10% proton storm: 5%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 13 13 10 09:00 3 167 162
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and earthquakes during the past day as reported by NEIC (colored circles).
NODAL EARTHQUAKES LIKELY ASSOCIATED WITH REYKJANES RIDGE
Following are expected (and observed locations following the February, 2015 quake) of
far-field seismic enhancment at nodal distances from the M 6.9 in the Reykjanes
Ridge of April 3, 2025.
Antipodal (~180 degrees)
North Atlantic to Macquarie Islands,
Outer shadow zone edge (141-148 degrees)
North Atlantic to Vanuatu, Kermadec Islands,
Node 3 (120 degrees)
North Atlantic to Sumatra, Molucca, Talaud, Halmahera,
P- and S- shadow zone edge and node 7 (101-110 degrees)
North Atlantic to Aisen, Chile, Andaman Is. Taiwan, South Sandwich Islands, Volcano Islands, Honshu, Japan,
Node 4 (90 degrees)
North Atlantic to Honshu, Japan, Central Chile,
Node 5 (72 degrees)
North Atlantic to northern Peru, Pakistan, Andreanof Islands, Southern Mid-Atlantic, Northeast Pacific Rise, Peru,
Node 6 (60 degrees)
North Atlantic to Nicaragua, Guatemala, Southern California, Alaska, Colombia, Central Mid-Atlantic, Mexico, Nevada, California, Costa Rica,
Node 7 (52 degrees)
North Atlantic to Central Mid-Atlantic, Colorado, Texas, Idaho, Montana, Washington, British Columbia
DISTANCE RELATIONS FROM NEW BRITAIN
Antipodal (~180 degrees)
New Britain to Central Mid-Atlantic,
Outer shadow zone edge (141-148 degrees)
New Britain to Dominican Republic, Haiti, Puerto Rico, Gibraltar,
Node 8 (135 degrees)
New Britain to Reykjanes Ridge, northern Chile, Peru, France,
Node 3 (120 degrees)
New Britain to Quebec, Guatemala, El Salavador, Dodecanese Islands, Nicaragua, Central Chile, Greece
P- and S- shadow zone edge and node 7 (101-110 degrees)
New Britain to Iran, Greenland Sea, Svalbard, Western Texas, East Pacific Rise, Alamosa, Colorado, Kansas, Baffin Bay, Iran, Michoacan, Jalisco, Mexico, Greenland Sea, Mayotte, Southern Colorado, Iran, Gulf of Aden, Caucasus, Arctic Ocean, Idaho, Montana, Nevada, Oklahoma,
Node 4 (90 degrees)
New Britain to Coast of No. California, Nevada, Central, Southern California, Afghanistan,
Node 5 (72 degrees)
New Britain to Alaska Peninsula, Fox Islands,
Node 6 (60 degrees)
New Britain to Komandorsky Is, Nicobar Islands, India, Hawaii, Andreanof Is, Kamchatka, Myanmar, South of New Zealand,
Node 7 (52 degrees)
New Britain to Sumatra, Honshu, Japan,
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 8 16 28 2025 5.7 126.6 4.3 SSE OF PONDAGUITAN PHILIPPINES M33 T63 R119 Z62 B27
04 8 15 26 2025 24.9 123.1 5.4 N OF YONAKUNI JAPAN M25 T75 R99 Z81 B41
04 8 14 50 2025 31.7 -104.3 2.5 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 8 13 02 2025 10.6 -86.0 4.4 TAMARINDO COSTA RICA M147 T91 R60 Z109 B122
04 8 11 30 2025 -20.3 -105.2 5.2 SOUTHEAST CENTRAL PACIFIC OCEA M160 T63 R96 Z74 B100
04 8 11 29 2025 -6.3 152.3 4.9 KOKOPO PAPUA NEW GUINEA M61 T35 R133 Z41 B0
04 8 10 28 2025 -17.9 -69.7 4.8 ESE OF PALCA PERU M165 T96 R77 Z98 B132
04 8 09 49 2025 19.5 -65.3 3.7 VIEQUES PUERTO RICO M134 T113 R41 Z130 B141
04 8 09 41 2025 40.5 -119.8 2.2 KM W OF EMPIRE M109 T78 R57 Z109 B92
04 8 09 30 2025 7.1 126.5 4.5 SAN IGNACIO PHILIPPINES M33 T64 R117 Z64 B28
04 8 08 43 2025 -17.0 -72.7 4.2 S OF CAMANá PERU M168 T94 R77 Z97 B130
04 8 08 43 2025 18.9 -155.2 3.5 ESE OF NAALEHU HAWAII M99 T43 R93 Z74 B57
04 8 07 59 2025 18.8 -155.2 3.7 ESE OF NAALEHU HAWAII M99 T42 R93 Z73 B57
04 8 07 36 2025 -14.1 170.5 4.6 VANUATU REGION" M81 T16 R137 Z32 B20
04 8 06 51 2025 34.0 -117.2 2.1 MORENO VALLEY CA M116 T76 R60 Z105 B94
04 8 05 52 2025 36.6 -121.3 2.1 NNW OF PINNACLES CA M111 T75 R61 Z105 B91
04 8 05 40 2025 -6.7 129.9 4.5 BANDA SEA" M43 T56 R131 Z50 B21
04 8 04 35 2025 0.7 123.8 4.7 WNW OF MODISI INDONESIA M34 T64 R123 Z59 B28
04 8 03 55 2025 0.7 -29.6 5.3 CENTRAL MID-ATLANTIC RIDGE" M122 T140 R51 Z132 B174
04 8 03 03 2025 33.5 -82.3 1.7 N OF HARLEM GEORGIA M124 T102 R40 Z127 B123
04 8 02 52 2025 66.2 -135.4 3.4 YUKON, CANADA M83 T90 R48 Z121 B88
04 8 02 23 2025 -6.0 128.1 4.1 S OF AMBON INDONESIA M42 T57 R130 Z52 B23
04 8 01 37 2025 -11.5 166.2 4.7 LATA SOLOMON ISLANDS M76 T21 R136 Z35 B15
04 8 00 26 2025 33.5 -82.3 1.9 N OF HARLEM GEORGIA M124 T102 R40 Z127 B123
04 8 00 01 2025 33.6 -82.3 1.8 WNW OF EVANS GEORGIA M124 T102 R40 Z127 B123
04 7 23 40 2025 40.3 -124.6 2.8 W OF PETROLIA CA M107 T75 R60 Z106 B89
04 7 23 29 2025 33.8 -116.1 2.6 NE OF COACHELLA CA M116 T76 R60 Z106 B95
04 7 22 48 2025 50.5 -177.5 4.5 SSW OF ADAK ALASKA M71 T70 R73 Z97 B62
04 7 22 44 2025 44.7 -111.9 2.2 NE OF SPENCER IDAHO M108 T85 R50 Z116 B98
04 7 21 28 2025 -5.4 102.8 4.3 PAGAR ALAM INDONESIA M28 T81 R120 Z67 B48
04 7 21 20 2025 49.2 -120.5 2.0 S OF PRINCETON CANADA M102 T83 R52 Z114 B93
04 7 20 17 2025 38.8 -122.8 2.3 WNW OF COBB CA M109 T75 R60 Z106 B90
04 7 20 00 2025 -6.2 151.4 4.8 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 7 19 49 2025 2.0 96.8 5.8 SE OF SINABANG INDONESIA M19 T90 R110 Z77 B55
04 7 17 20 2025 11.9 -87.6 4.4 SW OF CORINTO NICARAGUA M146 T90 R59 Z109 B121
04 7 15 57 2025 -17.4 -178.7 4.4 ENE OF LEVUKA FIJI M92 T5 R136 Z31 B31
04 7 15 28 2025 -6.4 151.5 5.0 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 7 15 02 2025 -23.9 179.2 4.5 THE FIJI ISLANDS M92 T7 R142 Z25 B31
04 7 14 27 2025 -6.2 151.6 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 7 13 29 2025 -11.7 165.0 5.1 LATA SOLOMON ISLANDS M75 T21 R136 Z34 B14
04 7 13 08 2025 -6.3 151.5 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 7 12 54 2025 18.9 -155.2 3.8 ESE OF NAALEHU HAWAII M99 T43 R93 Z74 B57
04 7 12 35 2025 18.9 -155.2 3.0 ESE OF NAALEHU HAWAII M99 T43 R93 Z74 B57
04 7 11 47 2025 40.0 -121.0 2.4 WNW OF PAXTON CA M109 T77 R58 Z108 B91
04 7 10 38 2025 36.5 -114.0 3.5 S OF SCENIC ARIZONA M115 T79 R57 Z109 B96
04 7 09 57 2025 18.8 -155.2 3.1 ESE OF NAALEHU HAWAII M99 T42 R93 Z73 B57
04 7 09 52 2025 38.8 -122.8 2.4 THE GEYSERS CA M109 T75 R60 Z106 B90
04 7 08 48 2025 18.4 -67.4 3.3 RINCóN PUERTO RICO M136 T111 R43 Z128 B139
04 7 07 24 2025 14.6 145.6 5.3 VILLAGE NORTHERN MARIANA ISLAN M47 T52 R112 Z63 B21
04 7 06 55 2025 -6.4 151.8 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 7 06 26 2025 32.7 82.5 4.2 NNE OF BURANG CHINA M15 T111 R77 Z108 B75
04 7 05 29 2025 31.7 -104.4 2.6 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 7 05 02 2025 39.0 -119.0 3.1 KM ENE OF YERINGTON M111 T78 R58 Z108 B93
04 7 04 19 2025 44.3 -115.2 2.1 WNW OF STANLEY IDAHO M108 T83 R52 Z114 B96
04 7 03 36 2025 -1.8 120.5 4.3 SSW OF POSO INDONESIA M33 T66 R124 Z59 B31
04 7 02 59 2025 49.4 155.5 5.4 SSW OF SEVERO-KURIL’SK RUSSI M53 T74 R78 Z96 B55
04 7 02 42 2025 37.4 -120.0 2.5 SSW OF MARIPOSA CA M111 T76 R60 Z106 B92
04 7 02 39 2025 37.6 -113.1 2.3 ENE OF KANARRAVILLE UTAH M114 T81 R56 Z110 B97
04 7 00 52 2025 35.9 140.8 4.6 N OF HASAKI JAPAN M41 T70 R91 Z85 B42
04 7 00 35 2025 18.0 -66.8 3.2 INDIOS PUERTO RICO M136 T111 R43 Z128 B140
04 7 00 18 2025 -5.6 133.8 4.6 E OF TUAL INDONESIA M46 T52 R131 Z49 B17
04 7 00 11 2025 -6.4 130.4 4.3 WSW OF TUAL INDONESIA M44 T55 R131 Z50 B21
April 7, 2025
An earthquake of M 3.7 was widely felt today in northwestern Washington State. NEIC reported intensity III in Federal Way, Enumclaw, Kent, North Bend, Seattle, Everett, Monroe, Camano Island, Ashford, Buckley, Port Orchard, Randle, Olympia, Thorp, and Victoria, British Columbia, Canada. Intensity II was also felt in Washington at Auburn, Black Diamond, Carnation, Fall City, Issaquah, Maple Valley, Ravensdale, Renton, Snoqualmie, Sammamish, Woodinville, Bellingham, Granite Falls, Marysville, Oak Harbor, Skykomish, Sultan, Carbonado, Eatonville, Gig Harbor, Orting, Puyallup, Spanaway, Bonney Lake, Tacoma, Olympia, Shelton, Leavenworth and Cle Elum and as far as 125 km from the epicenter.
This is a significant regional earthquake. The strongest earthquake to hit
this area in the past 20 years was an M 4.3 on October 8, 2006. The last event within about 50-100 km
of this epicenter with M>=3.7 occurred on January 3, 2018 with M 3.9 and prior to that on August 23, 2013.
At the time this summary had noted:
"The largest earthquake in the U.S. or Canada today was an M 3.9 near Morton, Washington. This earthquake occurred within minutes of local solar midnight and was probably
promoted by tidal stresses associated with the full moon which maximize at this hour. NEIC reported
this and aftershocks of M 2.5 and 2.4 were felt in the area with intensity II-III
at Morton, Glenoma, Toutle, Amboy, Ariel, Randle, Mineral, Yacolt, Kalama, Kelso, Woodland, Packwood, La Center, Battle Ground, Castle Rock, Washougal and within about 100 km of the epicenter in Washington State.
No major damages or casualties were reported with this event. The last earthquake
within about 100 km of this epicenter in Washington with M>=3.9 occurred as an
M 4.1 on November 16, 2010." (January 3, 2018)
Today's epicenter is at 103 degrees from the M 7.7 in Myanmar of March 28 and near
the fourth node from New Britain and may have been promoted by energy from those
sources. Possible seismic enhancement from Myanmar for this region of Washington
State had been noted in previous issues as:
"Earthquakes of M>=4.5 "have occurred in California or Nevada
in four of six occurrences of such an event in the Reykjanes Ridge with
several within 2-3 days (mostly at the sixth node (60 degrees) or the seventh node (52 degrees)
from the mainshocks in the Reykjanes area. These largest of these was the M 7.3 in December, 1954
in the Dixie Valley of Nevada which occurred 4-5 days after the North Atlantic
quake. The reason for this corresponding California activity may have to do
with the location of the North Atlantic events which lie near the Euler Pole
for North America and the Pacific Plates. This is the point around which the
North American plate appears to rotate with respect to the Pacific Plate.
A line perpendicular to local faults in California extended on a globe
will intersect other such lines at the Euler Pole. So energy emitted
at the Euler Pole will interact with faults in California as a pulse rather
than piece-meal. This simultaneity causes larger and more wide-spread
fault slippage especially in basin and range tectoniss as occur in
Nevada. With this in mind this summary is issuing a seismic watch for
the Pacific Plate-North American Plate and especially for vertical or strike-slip tectonics
regions for the next week extending from the Gulf of California to Washington
State with a moderate possibility of a moderate to strong quake in this time
period. A likely time for such event would be within a couple of days of the next full moon on April 13." (April 4, 6, 2025)
and
"P- and S- shadow zone edge and node 7 (101-110 degrees)
Myanmar to South of Africa, Washington, Oregon States, British Columbia, Alberta, Nunavit, Quebec, Eastern Canada, Montana, Central Mid-Atlantic, Northern, Kermadec Islands, Hawaii " (March 28, 2025)
The earthquake in Washington State occurred at the height of the current
geomagnetic storm which has been active since April 2. High latitude A for
this storm was 36 today and peaked with Kp 6 mid-day UT.
The strongest earthquake in the world today was an M 5.4 in the northern Kuril Islands. NEIC did not report it felt in this remote area.
A moderate earthquake of M 5.4 was also recorded in the Arctic Ocean north of Severnaya Zenlya, Russia today.
It was not reported felt in this remote area. This earthquake may have
been triggered by SFE from solar flare 4660 which was first observed
two minutes before the earthquake occurred. Data on this flare and earthquake
from SWPC follow.
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
4660 1035 1041 1043 C1.9 (April 6, 2025) 1.2E-03
Arctic Ocean M 5.4 10:37 UT
A moderate M 5.3 hit the northern Marianas Islands north of Guam today. NEIC reported it was felt with maximum intensity IV in the Northern Marianas at Gualo Rai and Garapan, Saipan and in Tinian with III and with III in Guam at Tamuning and Santa Rita.
Moderate earthquakes also continued today as aftershocks in New Britain. The larger
of these around M 5.2 were probably felt in Kimbe and Port Moresby with light intensity.
NEIC reported an earthquake of M 3.3 in Western Arizona was felt with intensity up to II-III in the area(s) of Western Arizona at Las Vegas, Nevada.
NEIC reported an earthquake of M 3.1 in Western Nevada was felt with intensity up to II-III in the area(s) of Western Nevada at Yerington, Nevada with intensity V.
NEIC reported an earthquake of M 2.5 in Central California may have been felt with intensity up to II-III in the area(s) of Mariposa, California.
NEIC reported an earthquake of M 4.1 in Northern South Island, New Zealand was felt with intensity up to II-III in the area(s) of Northern South Island, New Zealand in Blenheim, Marlborough and Nelson.
GeoNet reported the following parameters for this earthquake:
O: 06APR2025 21:49:03 41.6S 173.3E MB=5.1 GEONET 413 people reported feeling this earthquake with 286 at weak intensity and 109 with light shaking and 17 with moderate intensity 0 with strong, 0 with severe and 1 with extreme intensity.
NEIC reported an earthquake of M 4.9 in Greece was felt with intensity up to II-III in the area(s) of Greece with V at Kalavrita and Akrata, Ahaia.
NEIC reported an earthquake of M 4.1 in the Cayman Islands was felt with intensity up to II-III in the area(s) of the Cayman Islands at East End with intensity V; in Grand Cayman at George Town with IV and in West Bay with III.
NEIC reported an earthquake of M 4.5 in Taupo, New Zealand was felt with intensity up to II-III in the area(s) of Taupo, New Zealand with II in Auckland and in the Bay of Plenty area at Whakatane and in Napier, Hawke's Bay.
GeoNet reported the following parameters for this earthquake:
O: 06APR2025 10:57:08 38.1S 176.5E ML=4.8 GEONET 205 people reported feeling this earthquake with 174 at weak intensity and 29 with light shaking and 2 with moderate intensity 0 with strong, 0 with severe and 0 with extreme intensity.
GeoNet also reported the following parameters for an earthquake in Cook Strait, New Zealand today:
O: 06MAR2025 12:16:01 41.1S 175.1E ML=4.2 GEONET Felt with moderate to strong intensity in the area southeast of Picton, New Zealand and in southern North Island and northern South Island. 3940 reports of felt events were made of which 2039 reported weak and 1673 light intensity with 211 report of moderate shaking and 15 with strong and 1 severe and 1 with extreme intensity came from the area.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
4660 1035 1041 1043 C1.9 (April 6, 2025) 1.2E-03
Arctic Ocean M 5.4 10:37 UT
4690 1546 1553 1605 C2.9 (April 6, 2025) 3.1E-03
4720 1741 1744 1747 C2.0 (April 6, 2025) 8.2E-04
4740 1947 1957 2006 C2.3 (April 6, 2025) 2.4E-03
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 7-8 unsettled April 9. Solar M-flare chance: 55% X-class: 10% proton storm: 1%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 20 36 17 09:00 6 160 167
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and earthquakes during the past day as reported by NEIC (colored circles).
NODAL EARTHQUAKES LIKELY ASSOCIATED WITH REYKJANES RIDGE
Following are expected (and observed locations following the February, 2015 quake) of
far-field seismic enhancment at nodal distances from the M 6.9 in the Reykjanes
Ridge of April 3, 2025.
Antipodal (~180 degrees)
North Atlantic to Macquarie Islands,
Outer shadow zone edge (141-148 degrees)
North Atlantic to Vanuatu, Kermadec Islands,
Node 3 (120 degrees)
North Atlantic to Sumatra, Molucca, Talaud, Halmahera,
P- and S- shadow zone edge and node 7 (101-110 degrees)
North Atlantic to Aisen, Chile, Andaman Is. Taiwan, South Sandwich Islands, Volcano Islands, Honshu, Japan,
Node 4 (90 degrees)
North Atlantic to Honshu, Japan, Central Chile,
Node 5 (72 degrees)
North Atlantic to northern Peru, Pakistan, Andreanof Islands, Southern Mid-Atlantic, Northeast Pacific Rise, Peru,
Node 6 (60 degrees)
North Atlantic to Nicaragua, Guatemala, Southern California, Alaska, Colombia, Central Mid-Atlantic, Mexico, Nevada, California, Costa Rica,
Node 7 (52 degrees)
North Atlantic to Central Mid-Atlantic, Colorado, Texas, Idaho, Montana, Washington, British Columbia
DISTANCE RELATIONS FROM NEW BRITAIN
Antipodal (~180 degrees)
New Britain to Central Mid-Atlantic,
Outer shadow zone edge (141-148 degrees)
New Britain to Dominican Republic, Haiti, Puerto Rico, Gibraltar,
Node 8 (135 degrees)
New Britain to Reykjanes Ridge, northern Chile, Peru, France,
Node 3 (120 degrees)
New Britain to Quebec, Guatemala, El Salavador, Dodecanese Islands, Nicaragua, Central Chile, Greece
P- and S- shadow zone edge and node 7 (101-110 degrees)
New Britain to Iran, Greenland Sea, Svalbard, Western Texas, East Pacific Rise, Alamosa, Colorado, Kansas, Baffin Bay, Iran, Michoacan, Jalisco, Mexico, Greenland Sea, Mayotte, Southern Colorado, Iran, Gulf of Aden, Caucasus, Arctic Ocean, Idaho, Montana, Nevada, Oklahoma,
Node 4 (90 degrees)
New Britain to Coast of No. California, Nevada, Central, Southern California, Afghanistan,
Node 5 (72 degrees)
New Britain to Alaska Peninsula, Fox Islands,
Node 6 (60 degrees)
New Britain to Komandorsky Is, Nicobar Islands, India, Hawaii, Andreanof Is, Kamchatka, Myanmar, South of New Zealand,
Node 7 (52 degrees)
New Britain to Sumatra, Honshu, Japan,
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 7 11 47 2025 40.0 -121.0 2.4 WNW OF PAXTON CA M109 T77 R58 Z108 B91
04 7 10 38 2025 36.5 -114.0 3.3 KM S OF SCENIC M115 T79 R57 Z109 B96
04 7 09 52 2025 38.8 -122.8 2.4 THE GEYSERS CA M109 T75 R60 Z106 B90
04 7 08 48 2025 18.4 -67.4 3.3 RINCóN PUERTO RICO M136 T111 R43 Z128 B139
04 7 07 24 2025 14.6 145.6 5.3 VILLAGE NORTHERN MARIANA ISLAN M47 T52 R112 Z63 B21
04 7 06 55 2025 -6.4 151.8 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 7 06 26 2025 32.7 82.5 4.2 NNE OF BURANG CHINA M15 T111 R77 Z108 B75
04 7 05 29 2025 31.6 -104.3 2.8 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B105
04 7 05 28 2025 31.6 -104.3 2.2 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B105
04 7 05 02 2025 39.0 -119.0 3.1 KM ENE OF YERINGTON M111 T78 R58 Z108 B93
04 7 03 36 2025 -1.8 120.5 4.3 SSW OF POSO INDONESIA M33 T66 R124 Z59 B31
04 7 02 59 2025 49.4 155.5 5.4 SSW OF SEVERO-KURIL’SK RUSSI M53 T74 R78 Z96 B55
04 7 02 42 2025 37.4 -120.0 2.5 SSW OF MARIPOSA CA M111 T76 R60 Z106 B92
04 7 02 39 2025 37.6 -113.1 2.4 ENE OF KANARRAVILLE UTAH M114 T81 R56 Z110 B97
04 7 00 52 2025 35.9 140.8 4.6 N OF HASAKI JAPAN M41 T70 R91 Z85 B42
04 7 00 35 2025 18.0 -66.8 3.2 INDIOS PUERTO RICO M136 T111 R43 Z128 B140
04 7 00 18 2025 -5.6 133.8 4.6 E OF TUAL INDONESIA M46 T52 R131 Z49 B17
04 7 00 11 2025 -6.4 130.4 4.3 WSW OF TUAL INDONESIA M44 T55 R131 Z50 B21
04 6 23 47 2025 32.1 -101.5 2.5 W OF FORSAN TEXAS M123 T86 R53 Z114 B107
04 6 22 44 2025 38.9 70.9 4.0 ESE OF RASHT TAJIKISTAN M27 T121 R67 Z120 B86
04 6 22 00 2025 -10.5 162.4 4.6 KIRAKIRA SOLOMON ISLANDS M72 T24 R136 Z36 B11
04 6 22 00 2025 39.1 -119.0 2.1 KM ENE OF YERINGTON M111 T78 R58 Z108 B93
04 6 21 49 2025 -41.6 173.3 4.1 WAIRAU VALLEY NEW ZEALAND M95 T23 R159 Z7 B40
04 6 21 14 2025 -6.2 151.6 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 19 30 2025 -6.1 151.7 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 19 02 2025 38.2 -118.7 2.1 KM SSW OF HAWTHORNE M111 T77 R58 Z108 B93
04 6 18 44 2025 38.1 22.0 4.9 WNW OF KALáVRYTA GREECE M64 T157 R39 Z152 B124
04 6 18 15 2025 -58.7 -23.8 4.9 SOUTH SANDWICH ISLANDS REGION" M123 T97 R111 Z74 B115
04 6 15 16 2025 -6.3 151.6 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 15 15 2025 47.2 -121.5 3.7 E OF GREENWATER WASHINGTON M103 T82 R54 Z112 B92
04 6 15 11 2025 -6.3 151.5 4.8 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 14 41 2025 19.0 -80.5 4.1 EAST END CAYMAN ISLANDS M139 T99 R50 Z119 B127
04 6 12 40 2025 19.0 -65.2 3.0 AMALIE U.S. VIRGIN ISLANDS M135 T113 R42 Z130 B141
04 6 12 02 2025 39.5 -119.5 2.4 KM NW OF STAGECOACH M110 T78 R58 Z108 B92
04 6 12 00 2025 36.6 -121.2 2.0 NNW OF PINNACLES CA M112 T75 R61 Z105 B91
04 6 11 59 2025 11.8 -87.5 4.9 SSW OF CORINTO NICARAGUA M146 T90 R60 Z109 B121
04 6 10 57 2025 -38.2 176.4 4.5 OHINEMUTU NEW ZEALAND M96 T19 R155 Z11 B39
04 6 10 36 2025 83.5 113.6 5.4 NORTH OF SEVERNAYA ZEMLYA" M61 T108 R42 Z132 B90
04 6 10 02 2025 -6.2 151.8 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 09 22 2025 39.5 -119.5 3.3 NEVADA M110 T78 R58 Z108 B92
04 6 06 55 2025 -7.9 106.0 4.9 SSW OF PELABUHANRATU INDONESIA M31 T78 R123 Z63 B45
04 6 06 51 2025 -6.4 151.6 4.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 06 47 2025 27.4 53.1 4.3 SE OF MOHR IRAN M39 T136 R65 Z124 B100
04 6 06 29 2025 -21.6 170.5 4.9 SSE OF ISANGEL VANUATU M84 T14 R144 Z25 B23
04 6 06 11 2025 36.0 -120.6 3.3 NW OF PARKFIELD CA M112 T75 R61 Z105 B91
04 6 05 58 2025 38.8 -122.8 2.6 WNW OF COBB CA M109 T75 R60 Z106 B90
04 6 04 36 2025 -6.4 151.4 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 04 19 2025 3.4 127.2 4.6 NNW OF TOBELO INDONESIA M35 T62 R121 Z60 B26
04 6 04 00 2025 18.6 -68.8 3.9 DE HIGüEY DOMINICAN REPUBLIC M136 T109 R44 Z127 B138
04 6 03 58 2025 18.4 -65.8 3.1 HATO CANDAL PUERTO RICO M136 T112 R43 Z129 B141
04 6 03 20 2025 31.8 51.0 4.6 WSW OF BORÅ«JEN IRAN M40 T138 R61 Z128 B102
04 6 03 14 2025 31.7 -104.4 3.0 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 6 03 14 2025 -6.2 151.4 4.4 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 02 57 2025 40.4 -126.1 2.7 W OF FERNDALE CALIFORNIA M106 T74 R61 Z105 B87
04 6 02 03 2025 41.6 44.7 2.9 S OF KOJORI GEORGIA M46 T141 R51 Z138 B106
04 6 01 36 2025 -6.3 151.5 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
April 6, 2025
A light earthquake of M 3.4 was felt near Reno, Nevada today. NEIC reported it was felt with intensity IV in Reno and III in Sparks, Nevada.
This is the strongest earthquake within about 75 km of this epicenter in more
than a year - after an M 3.5 on January 29, 2024.
The area had been expected to see a significant regional event at this time
as noted in previous issues of this summary. But this event may not be the
anticipated earthquake due to its relatively small magnitude. Instead it may
be a foreshock to a larger event near this epicenter in the next several
days. On April 4, 2025 this summary published an analysis of the current seismic potential of
the area as:
Earthquakes of M>=4.5 "have occurred in California or Nevada
in four of six occurrences of such an event in the Reykjanes Ridge with
several within 2-3 days (mostly at the sixth node (60 degrees) or the seventh node (52 degrees)
from the mainshocks in the Reykjanes area. These largest of these was the M 7.3 in December, 1954
in the Dixie Valley of Nevada which occurred 4-5 days after the North Atlantic
quake. The reason for this corresponding California activity may have to do
with the location of the North Atlantic events which lie near the Euler Pole
for North America and the Pacific Plates. This is the point around which the
North American plate appears to rotate with respect to the Pacific Plate.
A line perpendicular to local faults in California extended on a globe
will intersect other such lines at the Euler Pole. So energy emitted
at the Euler Pole will interact with faults in California as a pulse rather
than piece-meal. This simultaneity causes larger and more wide-spread
fault slippage especially in basin and range tectoniss as occur in
Nevada. With this in mind this summary is issuing a seismic watch for
the Pacific Plate-North American Plate and especially for vertical or strike-slip tectonics
regions for the next week extending from the Gulf of California to Washington
State with a moderate possibility of a moderate to strong quake in this time
period. A likely time for such event would be within a couple of days of the next full moon on April 13." (April 4, 2025)
Today's event in western Nevada is near the sixth node (60 degrees) from the Reykjanes
Ridge and the fourth node (90 degrees) of the New Britain quake of M 6.9 yesterday
and may have been promoted by energy from these sources.
An M 3.2 also occurred today near Parkfield, California. NEIC reported it was felt lightly with intensity II in San Miguel, California and in Atascadero.
A number of light aftershock occurred with the Parkfield and Reno quakes suggesting
more stress is available in these areas to be relieved soon. Like the earthquake near Reno, Nevada today may be related to the events of M 6.9
in the Reykjanes Ridge and New Britain (see discussion above). These follow
a strong seismic calm in the area over the past several days. As with the Reno,
Nevada event this epicenter is near the sixth node from Reykjanes Ridge and
the fourth node from New Britain and could be a foreshock to a stronger
regional event. These two mainshocks are likely to have considerable enhancement
effect on west coast seismicity, especially when combined with the effects
of the M 7.7 of March 28 in Myanmar which this summary noted were likely for example as:
"NEIC reported an earthquake of M 2.5 in NW Washington State was felt with intensity up to II-III in the area(s) of NW Washington State with III in Port Angeles and I in Victoria, British Columbia, Canada.
This epicenter is located at 103 degrees from the M 7.7 in Myanmar and may
have been promoted by energy from that source." (March 29, 2025)
The last earthquake of equal or larger magnitude in the Parkfield area of California
was an M 3.5 on February 21, 2024 and an M 4.3 on August 10, 2023. At the time
this summary noted:
"This is the strongest earthquake in the region of Parkfield since an 4.3 on December 17, 2019. The
event in the Parkfield area of M>=4.4 was an 5.2 on March 22, 2014 followed by an M 4.7 on April 15, 2014.
At the time of the M 3.6-4.3 on December 17, 2019 this summary noted:
"The strongest earthquake in the U.S. or Canada today was an M 4.3 in Central California. NEIC reported maximum intensity IV in California at Sa Miguel and II-III at Shandon, Avenal, Creston, Paso Robles, Coalinga, Temp;leton, Atascadera, San Ardo and Bradley.
This is the strongest earthquake within about 50 km of this epicenter since an M 4.7 five years ago on April 15, 2014 - an aftershock of an M 5.2on March 22, 2014 about 50 km north of today's epicenter." (December 18, 2019, August 11, 2023)
The series of aftershocks with moderate intensity continued today in the
New Britain/New Guinea area following an M 5.9 in the region yesterday.
Many of these were felt lightly in Kimbe and Port Moresby, New Guinea.
An earthquake in the West Chile Rise with M 4.6 occurred today. It was not reported felt in this remote epicentral area.
This epicenter is located at 103-104 degrees from both the M 6.9 in New Britain
of April 5 and the M 6.9 in the Reykjanes Ridge the day before. It was likely
promoted by energy from these two sources.
The strongest earthquakes of the day occurred as events of M 5.6 and 5.4 in the South
Sandwich Islands. They were not reported felt in this remote area. This was
an area which was expected to see enhanced seismicity with the solar eclipse
of March 29 as noted at the time:
"The South Sandwich Islands has also been active in the past several days
as has the northern Gulf of California ..." (March 31, 2025)
NEIC reported an earthquake of M 4.9 in Java, Indonesia was felt with intensity up to II-III in the area(s) of Java, Indonesia at Margasari, Java.
NEIC reported an earthquake of M 2.6 in the California Geysers was felt with intensity up to II-III in the area(s) of the California Geysers with II in San Francisco, Kelseyville and Sacramento.
NEIC reported earthquakes of M 3.0 and 3.1 off the coast of Northern California were felt with intensity up to II-III in the area(s) of northern California at Myers Flat (II) and Fortuna.
NEIC reported an earthquake of M 4.3 in Rwanda was felt with intensity up to II-III in the area(s) of Rwanda at Kigali.
EMSC reported an earthquake of M 4.3 in Southern Myanmar was felt with intensity up to IV in the area(s) of Southern Myanmar at Lewe.
EMSC reported an earthquake of M 4.5 in Valparaiso, Chile was felt with intensity up to II in the area(s) of Valparaiso at Vina del Mar.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
4270 0105 0112 0114 C4.8 (April 5, 2025) 1.8E-03
New Britain M 4.9 01:07 UT
Myanmar M 3.8 01:08 UT
4310 0246 0251 0258 C2.3 (April 5, 2025) 1.6E-03
New Zealand M 3.3 02:55 UT
4350 0617 0624 0629 C2.7 (April 5, 2025) 9.0E-04
Myanmar M 4.1 06:39 UT
4360 0708 0713 0716 C2.9 (April 5, 2025) 1.5E-03
4500 1845 1849 1855 C3.9 (April 5, 2025) 1.9E-03
4510 1857 1905 1915 C4.7 (April 5, 2025) 1.3E-03
4520 1954 2005 2012 M1.0 (April 5, 2025) 6.9E-03
4560 2303 2309 2314 C2.2 (April 5, 2025) 7.6E-04
4570 2328 2333 2337 C2.1 (April 5, 2025) 1.2E-03
New Britain M 4.9 23:27 UT
4580 2346 2349 2352 C2.6 (April 5, 2025) 9.8E-04
Flores Sea M 4.4 23:57 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: major storms April 6 active April 7-8. Solar M-flare chance: 60% X-class: 15% proton storm: 5%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 40 47 20 08:00 6 163 184
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and earthquakes during the past day as reported by NEIC (colored circles).
NODAL EARTHQUAKES LIKELY ASSOCIATED WITH REYKJANES RIDGE
Following are expected (and observed locations following the February, 2015 quake) of
far-field seismic enhancment at nodal distances from the M 6.9 in the Reykjanes
Ridge of April 3, 2025.
Antipodal (~180 degrees)
North Atlantic to Macquarie Islands,
Outer shadow zone edge (141-148 degrees)
North Atlantic to Vanuatu, Kermadec Islands,
Node 3 (120 degrees)
North Atlantic to Sumatra, Molucca, Talaud, Halmahera,
P- and S- shadow zone edge and node 7 (101-110 degrees)
North Atlantic to Aisen, Chile, Andaman Is. Taiwan, South Sandwich Islands, Volcano Islands, Honshu, Japan,
Node 4 (90 degrees)
North Atlantic to Honshu, Japan, Central Chile,
Node 5 (72 degrees)
North Atlantic to northern Peru, Pakistan, Andreanof Islands, Southern Mid-Atlantic, Northeast Pacific Rise, Peru,
Node 6 (60 degrees)
North Atlantic to Nicaragua, Guatemala, Southern California, Alaska, Colombia, Central Mid-Atlantic, Mexico, Nevada, California, Costa Rica,
Node 7 (52 degrees)
North Atlantic to Central Mid-Atlantic, Colorado, Texas, Idaho, Montana, Washington, British Columbia
DISTANCE RELATIONS FROM NEW BRITAIN
Antipodal (~180 degrees)
New Britain to Central Mid-Atlantic,
Outer shadow zone edge (141-148 degrees)
New Britain to Dominican Republic, Haiti, Puerto Rico, Gibraltar,
Node 8 (135 degrees)
New Britain to Reykjanes Ridge, northern Chile, Peru, France,
Node 3 (120 degrees)
New Britain to Quebec, Guatemala, El Salavador, Dodecanese Islands, Nicaragua, Central Chile, Greece
P- and S- shadow zone edge and node 7 (101-110 degrees)
New Britain to Iran, Greenland Sea, Svalbard, Western Texas, East Pacific Rise, Alamosa, Colorado, Kansas, Baffin Bay, Iran, Michoacan, Jalisco, Mexico, Greenland Sea, Mayotte, Southern Colorado, Iran, Gulf of Aden, Caucasus, Arctic Ocean, Idaho, Montana, Nevada, Oklahoma,
Node 4 (90 degrees)
New Britain to Coast of No. California, Nevada, Central, Southern California, Afghanistan,
Node 5 (72 degrees)
New Britain to Alaska Peninsula, Fox Islands,
Node 6 (60 degrees)
New Britain to Komandorsky Is, Nicobar Islands, India, Hawaii, Andreanof Is, Kamchatka, Myanmar, South of New Zealand,
Node 7 (52 degrees)
New Britain to Sumatra, Honshu, Japan,
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 6 10 02 2025 -6.2 151.8 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 09 22 2025 39.5 -119.5 3.4 KM NW OF STAGECOACH , NEVADA M110 T78 R58 Z108 B92
04 6 06 55 2025 -7.9 106.0 4.9 SSW OF PELABUHANRATU INDONESIA M31 T78 R123 Z63 B45
04 6 06 51 2025 -6.4 151.6 4.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 06 47 2025 27.4 53.1 4.3 SE OF MOHR IRAN M39 T136 R65 Z124 B100
04 6 06 29 2025 -21.6 170.5 4.9 SSE OF ISANGEL VANUATU M84 T14 R144 Z25 B23
04 6 06 11 2025 36.0 -120.6 3.3 NW OF PARKFIELD CA M112 T75 R61 Z105 B91
04 6 05 58 2025 38.8 -122.8 2.6 WNW OF COBB CA M109 T75 R60 Z106 B90
04 6 04 36 2025 -6.4 151.4 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 04 19 2025 3.4 127.2 4.6 NNW OF TOBELO INDONESIA M35 T62 R121 Z60 B26
04 6 04 00 2025 18.6 -68.8 3.9 DE HIGüEY DOMINICAN REPUBLIC M136 T109 R44 Z127 B138
04 6 03 58 2025 18.4 -65.8 3.1 HATO CANDAL PUERTO RICO M136 T112 R43 Z129 B141
04 6 03 20 2025 31.8 51.0 4.6 WSW OF BORÅ«JEN IRAN M40 T138 R61 Z128 B102
04 6 03 14 2025 31.7 -104.4 3.0 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 6 03 14 2025 -6.2 151.4 4.4 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 6 02 57 2025 40.4 -126.1 2.7 W OF FERNDALE CALIFORNIA M106 T74 R61 Z105 B87
04 6 02 03 2025 41.6 44.7 2.9 S OF KOJORI GEORGIA M46 T141 R51 Z138 B106
04 6 01 36 2025 -6.3 151.5 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 23 57 2025 -6.9 122.0 4.4 SSW OF BAUBAU INDONESIA M38 T63 R129 Z54 B29
04 5 23 49 2025 18.4 -66.3 3.0 RIVERA COLON PUERTO RICO M136 T112 R43 Z128 B140
04 5 23 26 2025 -6.2 151.5 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 23 17 2025 39.5 -119.5 2.3 KM NNW OF STAGECOACH M110 T78 R58 Z108 B92
04 5 22 47 2025 40.7 -127.1 3.0 WNW OF FERNDALE CA M105 T74 R61 Z105 B87
04 5 22 38 2025 40.4 -124.8 3.1 WNW OF PETROLIA CA M107 T75 R60 Z106 B88
04 5 22 32 2025 -6.3 151.8 4.8 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 21 56 2025 -6.3 151.7 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 21 36 2025 36.5 -121.0 2.4 SSE OF PINNACLES CA M112 T75 R61 Z105 B91
04 5 21 23 2025 -22.4 -176.9 5.0 SW OF HOUMA TONGA M95 T3 R139 Z27 B34
04 5 19 36 2025 31.7 -104.1 2.2 W OF MENTONE TEXAS M123 T84 R54 Z112 B105
04 5 18 39 2025 -6.4 151.9 4.6 KIMBE PAPUA NEW GUINEA M61 T35 R133 Z41 B0
04 5 17 25 2025 41.0 143.0 4.4 S OF HONCHÅ JAPAN M43 T72 R86 Z89 B47
04 5 17 25 2025 -6.2 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 17 20 2025 41.0 143.1 4.5 S OF HONCHÅ JAPAN M43 T72 R86 Z89 B47
04 5 17 20 2025 -6.4 151.4 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 16 51 2025 -6.2 151.5 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 16 25 2025 -6.3 151.8 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 16 11 2025 -20.8 -178.7 4.4 FIJI REGION" M93 T4 R139 Z28 B32
04 5 16 06 2025 -36.3 -96.8 4.6 WEST CHILE RISE" M161 T68 R104 Z69 B103
04 5 15 15 2025 -6.2 151.6 4.7 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 15 14 2025 -6.4 151.6 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 15 13 2025 -2.1 29.1 4.3 W OF KIBUYE RWANDA M69 T148 R74 Z118 B122
04 5 15 03 2025 -6.2 151.2 4.6 KIMBE PAPUA NEW GUINEA M60 T36 R133 Z42 B0
04 5 14 59 2025 31.8 -104.1 2.2 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 5 14 41 2025 41.1 -123.3 2.4 SOMES BAR CA M107 T77 R59 Z107 B90
04 5 12 55 2025 40.5 -121.5 2.1 NE OF MINERAL CA M108 T77 R58 Z108 B91
04 5 12 51 2025 -6.4 151.5 5.0 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 12 31 2025 19.2 -67.2 3.4 SAN ANTONIO PUERTO RICO M135 T111 R43 Z128 B139
04 5 12 27 2025 28.8 51.3 4.2 ESE OF BUSHEHR IRAN M40 T138 R63 Z126 B101
04 5 11 33 2025 2.7 126.8 4.9 NW OF TOBELO INDONESIA M35 T62 R121 Z60 B26
04 5 11 32 2025 -57.3 -25.6 5.6 SOUTH SANDWICH ISLANDS REGION" M125 T98 R109 Z75 B116
04 5 11 32 2025 21.7 144.2 5.0 MARIANA ISLANDS REGION" M44 T58 R105 Z70 B28
04 5 11 30 2025 -6.4 151.6 5.0 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 11 29 2025 -57.3 -25.6 5.4 SOUTH SANDWICH ISLANDS REGION" M125 T98 R109 Z75 B116
04 5 11 24 2025 -6.3 151.5 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 11 22 2025 -33.8 -72.1 4.3 SAN ANTONIO CHILE M164 T88 R92 Z84 B122
04 5 09 50 2025 -6.3 151.4 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 09 19 2025 -20.1 -173.5 5.1 ESE OF FANGALE’OUNGA TONGA M97 T0 R135 Z31 B36
04 5 09 04 2025 -6.2 151.5 5.4 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 09 01 2025 -6.4 151.6 4.5 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 08 46 2025 32.4 -116.8 2.0 PRIMO TAPIA B.C. MX M117 T75 R61 Z104 B94
04 5 08 22 2025 49.2 155.4 4.5 SSW OF SEVERO-KURIL’SK RUSSI M53 T74 R78 Z95 B55
04 5 07 57 2025 52.5 -32.1 5.5 REYKJANES RIDGE" M93 T136 R0 Z166 B133
04 5 07 51 2025 -24.3 179.7 4.4 THE FIJI ISLANDS M93 T7 R142 Z24 B32
04 5 05 53 2025 38.9 -117.7 2.2 KM ENE OF GABBS M111 T78 R57 Z109 B94
04 5 05 41 2025 31.6 -104.0 2.3 NNW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 05 07 2025 -6.3 151.5 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 04 57 2025 -7.0 129.7 4.1 KEPULAUAN BABAR INDONESIA" M43 T56 R132 Z50 B21
04 5 04 40 2025 31.5 -104.0 2.1 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 04 09 2025 32.2 -101.8 2.8 N OF STANTON TEXAS M123 T86 R53 Z114 B107
04 5 04 06 2025 43.7 -74.1 1.7 NORTH CREEK NEW YORK M113 T110 R29 Z138 B125
04 5 04 02 2025 -24.0 -66.6 4.2 DE LOS COBRES ARGENTINA M163 T96 R82 Z95 B132
04 5 03 18 2025 18.0 -66.9 3.1 GUáNICA PUERTO RICO M136 T111 R44 Z128 B140
04 5 02 02 2025 -6.3 151.8 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 02 01 2025 -6.3 151.9 4.8 KIMBE PAPUA NEW GUINEA M61 T35 R133 Z42 B0
04 5 01 57 2025 -22.0 -173.8 5.0 ESE OF ‘OHONUA TONGA M98 T1 R137 Z29 B36
04 5 01 36 2025 31.7 -104.2 2.2 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 01 28 2025 -17.5 -70.5 4.4 SSW OF ILABAYA PERU M166 T96 R77 Z98 B132
04 5 01 28 2025 31.5 -104.0 2.3 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 01 22 2025 31.7 -104.3 3.1 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 5 01 22 2025 31.7 -104.3 2.6 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 5 01 07 2025 -6.4 151.7 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 5 00 57 2025 -6.2 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 00 55 2025 -6.3 151.7 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 00 21 2025 -6.3 151.8 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 00 18 2025 31.5 -104.0 2.0 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 00 03 2025 47.7 -113.8 2.1 FINLEY POINT MONTANA M105 T86 R49 Z117 B97
April 5, 2025
A major earthquake of M 6.9-7.0 hit the area of New Britain and New Guinea today.
Several moderate foreshocks have hit the region since the solar eclipse of
March 29, some of which appear to have been promoted by SFE associated
with solar flares and geomagnetic storms of the past several days. A series of
moderate earthquakes of M>=5 were also felt in the Kimbe area of New Guinea. These
foreshock occurrences may have provided fore-warning of strong stress build up in the region.
NEIC reported today's event of M 6.9 in New Britain/New Guinea was felt with
intensity V in New Britain at Kokopo and Kimbe; III in Papua New Guinea at
Port Moresby and Paguna. This is the strongest earthquake within about 250
km of today's epicenter since an M 7.5 on May 14, 2019 and an M 7.0 on October 10, 2018.
at the time this summary noted:
"The earthquakes in New Britain were reported felt with intensity IV in Kimbe, New Britain and II in Kokopo, East New Britain, PNG.
Little damage was reported with this series. The last earthquake of M>=7 in New Britain
was a similar M 7.0 on March 29, 2018 within about 50 km of today's epicenter.
The last of larger magnitude within about 200 km of this epicenter was an
M 7.5 on May 5, 2015. An M 7.9 about 250 km to the northeast occurred on December 17, 2016.
... New Britain is near the geomagnetic equator as was probably
promoted by the current geomagnetic storm. These earthquakes are also at the
third node from the landfall of Hurricane Michael (120 degrees). Earthquake motions
associated with landfall could enhance seismicity at distances similar
to those associated with strong earthquakes and other energetic surficial phenomena.
The two events - landfall and earthquakes occurred simultaneously." (October 10, 2018)
and
"The strongest earthquake in the world today was an M 7.5-7.7 in the New Britain
region of Papua New Guinea. NEIC reported it was felt with maximum intensity VII
in Rabaul, New Britain and VI in Kokopo; V in Namatanai, New Ireland; IV in Arawa, Solomon Islands and II-III in Kavleng, New Ireland and within about 500 km of the epicenter.
It was also reported felt with moderate to strong intensity in Port Vila, Lihir Island, Bougainville, Port Moresby with power blackouts in the
Kokopo area. PTWC issued a tsunami warning but this was later withdrawn. Villagers
near the epicenter on the west coast of New Ireland reported seeing the ocean
recede bu no damaging waves were recorded. Damage did occur in New Britain but
immediate reports are unclear as to how great it was. This is the strongest
earthquake in the world during the year 2019 to date. An M 7.5 hit the region of Ecuador
on February 22, 2019, the largest previous during this year. This earthquake
was simultaneous with the strongest geomagnetic storm since August 26, 2018 when AP reached 76.
...
The last earthquake of M>=7.5 in the region of New Britain within about 400 km
of today's epicenter was an M 7.9 on December 17, 2016 and prior to that an M 7.8 on November 16 and 17, 2000.
Readers of this summary should not be surprised by the relation between the
geomagnetic storm today and the earthquake in New Guinea. On May 7, two major C-class
solar flares, which probably led to today's geomagnetic storm, occurred in
conjunction with an M 7.2 in New Guinea. At the time this summary noted:
"A major earthquake of M 7.2 hit the region of eastern New Guinea today. NEIC reported maximum intensity VII in Papua New Guinea at Wau Morobe and VI in Bulolo, Lae, Kainantu and Goroka, Eastern Highlands, and V in Mount Hagen, Western Highlands, PNG and lesser shaking within about 300 km of the epicenter including at Lalibu, Madang, Kundiawa and Kerema, PNG.
This is the largest earthquake in the world since an M 7.5 in Ecuador on February 22, 2019
and one of only two such events during the year 2019. It occurred at an intermediate
depth of 141 km reducing surface effects. The M 7.2 is the strongest earthquake
within about 200 km of this epicenter in at least 30 years although an M 7.2
on May 15, 1992 and a similar M 7.2 on December 22, 1997 occurred just outside this
distance range. The last in the 200 km range was an M 7.6 on February 8, 1987. Similar
events occurred in February 1963; February, 1951; January, 1946; May, 1938 and February, 2007.
This event in New Guinea was probably promoted by a pair of strong C-class solar
flares. This summary had noted these as:
"Solar flare activity today included a C9.9 and a C7.3 flare, the strongest
recorded in the current year. The second of these occurred while New Guinea
was directly anti-solar and probably helped promote the later M 7.2 in that
area today. This flare activity is likely to increase and enhance seismicity along
the geomagnetic equator in the next five days." (May 6-7, 2019)" (May 7, 2019)
When a moderate earthquake of M 5.3 in New Britain occurred yesterday, this report
noted:
"The strongest earthquake in the world today was an M 5.3 in the region of New
Britain. This epicenter is located near the geomagnetic equator and may have
been promoted by the geomagnetic storm. It occurred near local solar midnight
a time when geomagnetic effects are maximized. Further such seismicity including
the possibility of a strong regional event is likely in the next several days." (May 13-14, 2019)
Another factor which probably led to enhanced seismicity in New Britain at this
time was the passage of Tropical Cyclone Ann to the south of this epicenter at
the time of the M 7.5-7.7 event. This summary had noted this possibility in
previous issues as:
"Tropical Cyclone Ann (27P) continued today in the area south of New Guinea with winds up to 45 kts.
It is expected track to the west over the next several days. Some seismic enhancement in the region of
New Guinea and the Solomon Islands is possible at this time." (May 13-14, 2019)
(May 14, 2019)
This earthquake in New Britain occurred at 60 degrees (node 6) from Myanmar M 7.7 of March 28 and at the
10th node (36 degrees) from the M 7.1 in Tonga of March 30, 2025. It is also at
the eighth node (135 degrees) from the M 6.9 in the Reykjanes Ridge which
occurred on April 3. Finally it is located in the antipodal region (within about
5 degrees) of the M 6.6 in the Central Mid-Atlantic earthquake of March 28, 2025
and may have been promoted by energy from all these sources.
A tsunami warning was issued by PTWC but was later cancelled when no damaging
waves were observed with this earthquake.
Today's earthquake in New Britain occurred at the maximum of a geomagnetic
strom which reached planetary and low latitude Kp of 5.33 at the time of the storm. It may
have been promoted by energy from that storm, which continued from the previous day.
Strong aurorae are expected with this geomagnetic storm. In the previous issue of this summary the coincidence of the main part of this
storm with the Reykjanes Ridge (M 6.9) quake had been similarly noted as:
"The mainshock (in Reykjanes Ridge) occurred within a couple of minutes of local solar noon and
was probably promoted by tidal and/or geomagnetic stresses which maximize
near this hour. The mainshock was coincident with the peak of a strong
geomagnetic storm which reached Kp of 6 at high latitudes at the time of
the mainshock and could have triggered it." (April 4, 2025)
An M 5.2 preceded the M 6.9 in New Britain several hours earlier in Eastern New Guinea. NEIC reported it was felt with intensity III in Goroka, Eastern Highlands, New Guinea.
Due to its distance from Tonga (45 degrees) and Myanmar (60 degrees) the region
of New Guinea and New Britain had been singled out as an area of possibly
significant seismic enhancement at this time as noted in previous issues of
this summary:
"Node 7 (52 degrees)
Tonga to East Pacific Rise, South of Australia, Western Australia, New Guinea, Mariana Is, " (April 1-4, 2025)
and
"Node 6 (60 degrees)
Myanmar to Western Turkey, Ukraine, SW Australia, Kamchatka/Komandorsky Is, Crete, Greece, New Guinea, New Britain, " (April 1-4, 2025)
Forecast 171088 had expected a possibly strong earthquake in this area was
likely around April 2, 2025. Following are the forecast an epicentral data
for this quake.
O: 04APR2025 20:04:38 6.2S 151.8E ML=6.9 NEIC New Britain/New Guinea
P: 02APR2025 171088 4.0S 151.0E 4.0-6.0 ACAAA New Ireland
A set of three light earthquakes occurred east of San Francisco, California today.
The largest of these was M 3.1. The M 3.1 also occurred in Central California shortly before the M 4.0 in the Geysers
today (see above). NEIC reported it was felt with intensity III in Hollister, Salinas, San Juan Bautista with lesser shaking as far as Oakland, California.
This epicenter is also at the sixth node from the Reykjanes Ridge. These
epicenters are also at 90 degrees (node 4) from the M 6.9 in New Britain today
and may represent a site of further and stronger activity in the next several days.
EMSC reported an earthquake of M 4.7 in Myanmar was felt with intensity up to II-III in the area(s) of Myanmar at Kyaukse, Sintgaing, Mandalay, Patheingyi, Pyinoolwin, Meiktila, Taunggyi.
EMSC reported earthquakes of M M 4.9 and M 4.7 in Nepal were felt with intensity up to IV in the area(s) of Nepal at Kathmandu, and in India at Sitarganj, Ayodhya, Almora, Hasanganj, Moradabad.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
4060 0727 0734 0737 C1.8 (April 4, 2025) 1.0E-03
Samoa M 4.5 08:00 UT
4090 1007 1024 1049 C3.3 (April 4, 2025) 7.2E-03
Baja California M 4.5 10:25 UT
Antofagasta M 4.5 10:35 UT
4110 1324 1328 1332 C2.2 (April 4, 2025) 1.0E-03
4130 1434 1446 1453 C4.4 (April 4, 2025) 3.7E-03
No. California M 2.2 14:35 UT
SE Alaska M 3.5 14:36 UT
4250 2324 2338 2354 C5.7 (April 4, 2025) 7.8E-03
New Britain M 4.6 23:20 UT M 4.9 23:46 UT
Western Xizang M 4.4 23:38 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: minor storms April 5 active April 6 unsettled April 7. Solar M-flare chance: 65% X-class: 15% proton storm: 10%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 33 44 19 17:00 6 124 180
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 6.9 in New Britain (Green stipples) of
April 4, 2025 and earthquakes during the past day as reported by NEIC (colored circles).
NODAL EARTHQUAKES LIKELY ASSOCIATED WITH REYKJANES RIDGE
Following are expected (and observed locations following the February, 2015 quake) of
far-field seismic enhancment at nodal distances from the M 6.9 in the Reykjanes
Ridge of April 3, 2025.
Antipodal (~180 degrees)
North Atlantic to Macquarie Islands,
Outer shadow zone edge (141-148 degrees)
North Atlantic to Vanuatu, Kermadec Islands,
Node 3 (120 degrees)
North Atlantic to Sumatra, Molucca, Talaud, Halmahera,
P- and S- shadow zone edge and node 7 (101-110 degrees)
North Atlantic to Aisen, Chile, Andaman Is. Taiwan, South Sandwich Islands, Volcano Islands, Honshu, Japan,
Node 4 (90 degrees)
North Atlantic to Honshu, Japan, Central Chile,
Node 5 (72 degrees)
North Atlantic to northern Peru, Pakistan, Andreanof Islands, Southern Mid-Atlantic, Northeast Pacific Rise, Peru,
Node 6 (60 degrees)
North Atlantic to Nicaragua, Guatemala, Southern California, Alaska, Colombia, Central Mid-Atlantic, Mexico, Nevada, California, Costa Rica,
Node 7 (52 degrees)
North Atlantic to Central Mid-Atlantic, Colorado, Texas, Idaho, Montana, Washington, British Columbia
DISTANCE RELATIONS FROM NEW BRITAIN
Antipodal (~180 degrees)
New Britain to Central Mid-Atlantic,
Outer shadow zone edge (141-148 degrees)
New Britain to Dominican Republic, Haiti, Puerto Rico, Gibraltar,
Node 8 (135 degrees)
New Britain to Reykjanes Ridge, northern Chile, Peru, France,
Node 3 (120 degrees)
New Britain to Quebec, Guatemala, El Salavador, Dodecanese Islands, Nicaragua, Central Chile, Greece
P- and S- shadow zone edge and node 7 (101-110 degrees)
New Britain to Iran, Greenland Sea, Svalbard, Western Texas, East Pacific Rise, Alamosa, Colorado, Kansas, Baffin Bay, Iran, Michoacan, Jalisco, Mexico, Greenland Sea, Mayotte, Southern Colorado, Iran, Gulf of Aden, Caucasus, Arctic Ocean, Idaho, Montana, Nevada, Oklahoma,
Node 4 (90 degrees)
New Britain to Coast of No. California, Nevada, Central, Southern California, Afghanistan,
Node 5 (72 degrees)
New Britain to Alaska Peninsula, Fox Islands,
Node 6 (60 degrees)
New Britain to Komandorsky Is, Nicobar Islands, India, Hawaii, Andreanof Is, Kamchatka, Myanmar, South of New Zealand,
Node 7 (52 degrees)
New Britain to Sumatra, Honshu, Japan,
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for New Zealand (ZDIS), New Britain (BDIS) Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 5 08 46 2025 32.4 -116.8 2.0 PRIMO TAPIA B.C. MX M117 T75 R61 Z104 B94
04 5 07 57 2025 52.5 -32.1 5.5 REYKJANES RIDGE" M93 T136 R0 Z166 B133
04 5 05 53 2025 38.9 -117.7 2.2 KM ENE OF GABBS M111 T78 R57 Z109 B94
04 5 05 41 2025 31.6 -104.0 2.3 NNW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 05 07 2025 -6.3 151.5 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 04 40 2025 31.5 -104.0 2.1 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 04 09 2025 32.2 -101.8 2.8 N OF STANTON TEXAS M123 T86 R53 Z114 B107
04 5 04 06 2025 43.7 -74.1 1.7 NORTH CREEK NEW YORK M113 T110 R29 Z138 B125
04 5 03 18 2025 18.0 -66.9 3.1 GUáNICA PUERTO RICO M136 T111 R44 Z128 B140
04 5 01 57 2025 -22.0 -173.8 5.0 ESE OF ‘OHONUA TONGA M98 T1 R137 Z29 B36
04 5 01 36 2025 31.7 -104.2 2.2 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 01 28 2025 31.5 -104.0 2.3 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 5 01 22 2025 31.7 -104.3 3.1 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 5 01 22 2025 31.7 -104.3 2.6 WHITES CITY NEW MEXICO M123 T84 R54 Z112 B105
04 5 01 07 2025 -6.4 151.7 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 5 00 57 2025 -6.2 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 00 55 2025 -6.3 151.7 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 00 21 2025 -6.3 151.8 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 5 00 18 2025 31.5 -104.0 2.0 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 23 46 2025 -6.2 151.4 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 23 20 2025 -6.2 151.4 4.6 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 22 27 2025 -6.3 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 22 02 2025 -6.2 151.7 5.2 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 21 56 2025 -6.2 151.6 5.0 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 21 46 2025 -6.2 151.6 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 21 38 2025 -6.5 151.4 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z41 B0
04 4 21 32 2025 -6.3 151.7 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 21 29 2025 -6.4 151.5 4.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 21 14 2025 -6.2 151.5 5.1 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 21 12 2025 41.0 141.8 4.6 E OF YOKOHAMA JAPAN M42 T73 R86 Z89 B47
04 4 20 39 2025 -6.4 151.6 5.3 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 20 27 2025 38.8 -122.9 2.3 THE GEYSERS CA M109 T75 R60 Z106 B90
04 4 20 04 2025 -6.2 151.8 6.9 KIMBE PAPUA NEW GUINEA M61 T36 R133 Z42 B0
04 4 20 04 2025 -6.2 151.6 7.1 NEW BRITAIN M61 T36 R133 Z42 B0
04 4 19 15 2025 41.3 140.2 4.6 WNW OF IMABETSU JAPAN M41 T74 R86 Z90 B48
04 4 16 17 2025 -24.4 -180.0 4.1 THE FIJI ISLANDS M93 T6 R142 Z24 B32
04 4 15 49 2025 52.6 -31.5 4.4 NORTHERN MID-ATLANTIC RIDGE" M92 T136 R0 Z167 B133
04 4 15 37 2025 38.1 -121.8 3.1 NNE OF PITTSBURG CA M110 T75 R60 Z106 B90
04 4 15 25 2025 21.6 96.1 4.7 KYAUKSE BURMA (MYANMAR) M0 T97 R93 Z92 B60
04 4 15 16 2025 38.1 -121.8 2.3 NNE OF PITTSBURG CA M110 T75 R60 Z106 B90
04 4 14 36 2025 58.3 -136.9 3.3 34 KM WNW OF M88 T84 R53 Z114 B85
04 4 14 34 2025 38.1 -121.8 2.2 NNE OF PITTSBURG CA M110 T75 R60 Z106 B90
04 4 14 22 2025 29.0 82.0 4.9 ENE OF DAILEKH NEPAL M14 T111 R80 Z106 B75
04 4 13 41 2025 31.6 -103.9 2.3 NNW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 13 12 2025 24.1 121.6 4.0 HUALIEN CITY TAIWAN M23 T76 R100 Z81 B41
04 4 12 41 2025 -20.3 -172.4 4.8 ESE OF FANGALE’OUNGA TONGA M98 T1 R135 Z31 B37
04 4 11 58 2025 31.6 -104.0 2.7 NNW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 11 17 2025 31.7 -104.4 2.8 WHITES CITY NEW MEXICO M123 T84 R55 Z112 B104
04 4 11 15 2025 31.6 -104.1 2.2 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 11 07 2025 -0.5 99.6 4.7 W OF PARIAMAN INDONESIA M22 T86 R114 Z73 B52
04 4 10 51 2025 -5.7 145.7 5.2 MADANG PAPUA NEW GUINEA M55 T41 R133 Z44 B5
04 4 10 35 2025 -21.7 -68.7 4.4 SW OF OLLAGüE CHILE M165 T95 R80 Z95 B131
04 4 09 44 2025 35.7 -97.4 2.1 KM W OF ARCADIA M121 T91 R48 Z119 B110
04 4 09 39 2025 9.5 126.3 4.4 NNE OF CORTES PHILIPPINES M31 T65 R115 Z66 B29
04 4 09 38 2025 52.1 -170.0 3.9 FOX ISLANDS, ALASKA M75 T72 R69 Z100 B66
04 4 09 23 2025 31.5 -104.0 2.6 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 09 10 2025 35.7 -97.4 2.8 KM W OF ARCADIA M121 T91 R48 Z119 B110
04 4 09 04 2025 35.7 -97.4 2.9 KM W OF ARCADIA M121 T91 R48 Z119 B110
04 4 08 44 2025 36.2 -89.4 2.7 SSE OF RIDGELY TENNESSEE M121 T97 R42 Z124 B116
04 4 08 31 2025 4.0 -82.6 4.8 SOUTH OF PANAMA M154 T92 R63 Z107 B125
04 4 08 17 2025 -2.8 141.3 4.6 VANIMO PAPUA NEW GUINEA M50 T47 R129 Z48 B10
04 4 08 01 2025 -15.5 -174.5 5.7 WNW OF HIHIFO TONGA M95 T4 R132 Z35 B34
04 4 08 00 2025 -15.5 -174.6 4.5 WNW OF HIHIFO TONGA M95 T4 R132 Z35 B34
04 4 07 18 2025 -1.9 135.7 4.4 SSW OF BIAK INDONESIA M45 T52 R128 Z51 B16
04 4 06 59 2025 -7.9 109.1 4.7 SSE OF CILACAP INDONESIA M32 T75 R125 Z61 B42
04 4 06 51 2025 31.5 -104.0 2.1 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 06 49 2025 31.7 -104.2 2.3 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 06 37 2025 31.5 -104.0 1.8 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 06 33 2025 31.5 -104.0 2.5 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 06 31 2025 38.8 -122.8 3.9 NW OF THE GEYSERS M109 T75 R60 Z106 B90
04 4 06 14 2025 31.7 -104.2 2.5 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 04 23 2025 36.8 -121.4 3.1 S OF RIDGEMARK CA M111 T75 R61 Z105 B91
04 4 03 44 2025 29.4 52.8 4.4 NNE OF AKBARÄBÄD IRAN M39 T136 R64 Z126 B100
04 4 03 28 2025 36.8 -121.3 2.1 TRES PINOS CA M111 T75 R61 Z105 B91
04 4 03 07 2025 -21.2 -68.7 4.3 W OF OLLAGüE CHILE M165 T96 R80 Z96 B132
04 4 02 36 2025 37.4 -114.3 2.6 KM SE OF CALIENTE M114 T80 R56 Z109 B96
04 4 02 34 2025 45.5 145.5 4.7 N OF OTRADA RUSSIA M46 T75 R82 Z93 B51
04 4 02 33 2025 -22.2 -179.5 4.5 THE FIJI ISLANDS M93 T5 R140 Z27 B32
04 4 01 37 2025 -16.3 -72.5 4.8 EL PEDREGAL PERU M167 T94 R77 Z98 B130
04 4 01 28 2025 31.5 -104.0 2.4 NW OF TOYAH TEXAS M123 T84 R54 Z112 B105
04 4 01 01 2025 18.0 -68.3 3.4 DE YUMA DOMINICAN REPUBLIC M137 T110 R44 Z127 B139
04 4 00 33 2025 -23.7 -179.9 4.6 THE FIJI ISLANDS M93 T6 R142 Z25 B32
April 4, 2025
A major earthquake occurred today in the Reykjanes Ridge area of the North Atlantic Ridge with M 6.9.
The mainshock was followed by an M 5.4 aftershock about 150 km to the west.
EMSC reported it was felt in Ramsey, Isle of Man as a banging noise and a slight vibration.
The mainshock occurred within a couple of minutes of local solar noon and
was probably promoted by tidal and/or geomagnetic stresses which maximize
near this hour. The mainshock was coincident with the peak of a strong
geomagnetic storm which reachedKp of 6 at high latitudes at the time of
the mainshock and could have triggered it.
While a tsunami is a possibility with an oceanic event of this magnitude,
it is likely (should it occur) to be minor and non-destructive.
Only one earthquake has occurred in the Reykjanes Ridge with equal or greater
magnitude - an M 7.1 ten year ago on February 13, 2015. At the time this summary noted:
"A major earthquake of M 6.8-7.1 hit the Northern Mid-Atlantic Ridge today. NEIC reported
this quake may have been felt as far as 2000 km from the epicenter in Kilbirnie, Scotland, U.K.
This earthquake was preceded and followed by a series of foreshocks and aftershocks.
Some of these aftershocks occurred at great distance, such as an M 6.2 at 102 degrees
away in Taiwan which occurred about an hour later. Another strong series likely
triggered by this North Atlantic quake occurred several hours later at the sixth
node (60 degrees) from that epicenter in the region of Nevada near the Nevada-California
area. This sequence began with an M 3.2 and included an M 4.7 event and many
foreshocks and aftershocks. A contributing seismic promoter of this activity
may have been a strong Gamma Ray Burst. While this GRB was first noted by the
Swift Mission at 22:31 UT, past observations suggest that other related effects
such as proposed gravitational waves may influence seismicity several hours
before first observation. This would be consistent with the timing of today's
strong seismicity. This seismic activation also is consistent with geomagnetic
promotion. As noted in this summary of February 11-12 the effects on seismicity of the previous geomagnetic
storm were maximized in the past several days. That had noted:
"the most disturbed the geomagnetic field has been since January 7 when the AP reached 38. A global seismic watch begins today (February 5) and extends
through February 10 with the most likely strong events towards the end of this period. The highest
chance for a strong earthquake in this period is about 10-15 degrees from the geomagnetic equator and at auroral latitudes." (February 8-10, 2015)
The earthquake in the North Atlantic of M 6.8-7.1 is the strongest recorded
in the world during the year 2015. Slightly smaller events hit on January 7
in Panama; January 23 in Vanuatu and February 12 in Argentina all with M 6.7-6.8.
This is the strongest earthquake within 300 km in at least 25 years.
It may be part of the regional activation of the area associated with the
strong eruption of Bardarbunga volcano in Iceland which has been ongoing
for the past half year and where an M 4.7 earthquake occurred today shortly
after this event in the North Atlantic. The only comparable event in the past 25 years in the region
was an M 6.8 on Febaruary 16, 1998. The last and only historical earthquake of M>=7.1 in this area of
the North Atlantic Ridge was recorded as an M 7.3 on October 16, 1974. Earthquakes
of this size on ocean ridges are rare due to the tectonics involved. The tectonics
also inhibits tsunamis. No tsunami was expected or observed with this earthquake." (February 13, 2015)
Like the event in 2015 this was associated with a major eruption about 1100 km to
the North in southern Iceland and was part of a strong activation of the
North Atlantic following the solar eclipse of March 29, 2025 and had been
expected as a consequence of stresses with that eclipse as noted in this summary:
"The new moon will arrive on March 29, 2025 at 10:58 UT. This is a partial solar eclipse which will be visible in portions of the northeastern U.S, Eastern Canada, Greenland, north Atlantic, Europe, and Africa. Longitudes which are at local solar noon at the peak of this eclipse are near 15 East while those at local solar midnight are near 165 West. In the east these include areas of central Europe including Mt. Etna and Stromboli in Italy and the areas of Iceland and the Reykjanes Ridge and Greenland in the north Atlantic and portions of northeastern U.S, with maximum near Portland Maine at sunrise on March 29 and in the west the central and western Aleutians and Hawaii. Regions in the southern Hemisphere including Tonga, Samoa and Fiji and the South Sandwich Islands in the South Atlantic may also see tidal enhancement. These regions may see significant seismic enhancements with this new moon and partial solar eclipse. Other areas where fluids are involved in seismicity may also see increased seismicity near local solar noon or midnight. The chances of a tidally-related strong to major earthquake during the next week is considered to be high." (March 23-31, 2025)
This epicenter is near the antipode of the M 6.8 in southern New Zealand of
March 25 and also near the fourth node from Myanmar of March 28 (M 7.7) and
at the ninth node (135 degrees) from the M 7.1 in Tonga of March 30.
They Reykjanes Ridge had expected to experience enhanced seismicity
at this time in the forecasts for these two event as noted in previous
issues of this summary (March 28-April 2, 2025) as:
"Node 4 (90 degrees)
Myanmar to Fiji, Tonga, SE Alaska, Greenland, Baffin, South Island, New Zealand, Reykjanes Ridge, Madeira Islands,
Outer shadow zone edge (141-148 degrees)
Tonga to mid-Atlantic, Iran, Lebanon, Iceland, Azores, Turkey, Mid-Atlantic, Reykjanes Ridge," (April 1-3, 2025)
Forecast 171257 had expected this event within about 50 km was likely
in early April as a possibly strong earthquake.
Following is the EMSC (O:) and forecast (P:) data for this earthquake:
There is some danger for the Pacific Plate-North American plate seismicity
following this earthqake in the Reykjanes Ridge. Following is a listing
in the Reykjanes area of M>=6.5 over the past century. The second reading
is for an earthquake in the California/Nevada area in the days following
the Reykjanes Ridge event.
12 11 12 57 7 1954 52.500 -32.000 0 6.5 0
12 16 11 7 11 1954 39.280 -118.120 0 7.3 0 Dixie Valley, Nevada
12 25 9 33 36 1956 48.750 -27.750 0 6.5 0
12 31 17 39 24 1956 38.283 -118.967 10 5.5 0 California-Nevada border
2 13 23 14 24 1967 52.761 -34.098 33 6.8 159
2 16 15 5 54 1967 37.422 -114.184 33 4.8 32 Caliente, Nevada
2 16 19 41 27 1967 32.150 -116.016 5 4.6 16 Southern California
2 17 8 12 56 1967 31.600 -116.240 10 4.6 12 Southern California
2 18 18 48 56 1967 34.183 -117.266 1 4.7 26 Eastern Los Angeles
10 16 5 45 11 1974 52.710 -32.000 41 7.3 355
11 3 8 26 10 1974 31.000 -115.200 33 4.7 0 Baja California
02 16 23 53 19 1998 52.718 -33.677 10 6.8 10
02 18 14 29 34 1998 31.915 -115.746 3 4.6 10 Baja California
02 13 18 59 12 2015 52.635 -31.884 16 7.1 10
02 14 02 28 56 2015 37.142 -117.262 17 4.8 10 Ridgecrest, California
As can be seen an earthquake of M>=4.5 have occurred in California or Nevada
in four of six occurrences of such an event in the Reykjanes Ridge with
several within 2-3 days (mostly at the sixth node (60 degrees) or the seventh node (52 degrees)
from the mainshocks in the Reykjanes area. These largest of these was the M 7.3 in December, 1954
in the Dixie Valley of Nevada which occurred 4-5 days after the North Atlantic
quake. The reason for this corresponding California activity may have to do
with the location of the North Atlantic events which lie near the Euler Pole
for North America and the Pacific Plates. This is the point around which the
North American plate appears to rotate with respect to the Pacific Plate.
A line perpendicular to local faults in California extended on a globe
will intersect other such lines at the Euler Pole. So energy emitted
at the Euler Pole will interact with faults in California as a pulse rather
than piece-meal. This simultaneity causes larger and more wide-spread
fault slippage especially in basin and range tectoniss as occur in
Nevada. With this in mind this summary is issuing a seismic watch for
the Pacific Plate-North American Plate and especially for vertical or strike-slip tectonics
regions for the next week extending from the Gulf of California to Washington
State with a moderate possibility of a moderate to strong quake in this time
period. A likely time for such event would be within a couple of days of the next full moon on April 13.
O: 03APR2025 14:09:32 52.6N 32.1W ML=6.9 EMSC Reykjanes Ridge
P: 10APR2025 171257 53.0N 32.0W 4.0-6.1 CAAAA North Mid-Atlantic Ridge
An earthquake of M 4.0 occurred today in northern California in the California Geysers region.
NEIC reported it was felt with intensity II-III in California at Saint Helena, Cloverdale, Geyserville, Healdsburg, Hopland, Kelseyville, Angwin, Calistoga, Lakeport and Santa Rosa, California.
This epicenter is at 60 degrees (node 6) from the Reykjanes M 6.9 today and may
represent excess triggering from that event. More such activity along the
western coast of North America is expected in the next week (see above).
An M 3.1 also occurred in Central California shortly before the M 4.0 in the Geysers
today (see above). NEIC reported it was felt with intensity III in Hollister, Salinas, San Juan Bautista with lesser shaking as far as Oakland, California.
This epicenter is also at the sixth node from the Reykjanes Ridge.
NEIC also reported an M 3.2 was felt in western Colorado near Montrose today. NEIC reported it was felt with intensity III in Colorado at Montrose, Delta, Grand Junction and II in Fraser, Paonia, and perhaps as far as Denver.
This epicenter is at 52 degrees from Reykjanes ride (node 7) and may have
promoted by energy from that source.
NEIC reported an earthquake of M 4.7 in Java, Indonesia was felt with intensity up to II-III in the area(s) of Java, Indonesia at Purbalingga and Purwokerto (IV).
EMSC reported moderate shaking in Cilacap Selatan, Adipala, Kedawung.
NEIC reported an earthquake of M 4.4 in Southern Iran was felt with intensity up to II-III in the area(s) of Southern Iran at Fars in Marvdasht, Shiraz and in Ahwaz, Khuzestan, Iran.
EMSC reported moderate shaking in Shiraz, Iran.
NEIC reported an earthquake of M 2.6 in Nevada was felt with intensity up to II-III in the area(s) of Nevada at Caliente.
This closely matches the location of a similar quake that followed an M 6.8
in the Reykjanes Ridge in February, 1967 near Caliente.
2 13 23 14 24 1967 52.761 -34.098 33 6.8 159
2 16 15 5 54 1967 37.422 -114.184 33 4.8 Caliente, Nevada
NEIC reported an earthquake of M 4.8 in Southern Peru was felt with intensity up to II-III in the area(s) of Southern Peru at Arequipa and Mollendo.
NEIC reported an earthquake of M 4.4 in Saudi Arabia was felt with intensity up to II-III in the area(s) of Saudi Arabia at Jubail.
EMSC reported moderate shaking in Saudi Arabia at Al Jubail, Safwa, Dammam, Al Umran, Riyadh, Al Hisyan, and Ad Dawhah, Qatar.
NEIC reported earthquakes of M 4.9 in Central Vanuatu were felt with intensity up to II-III in the area(s) of Vila Shefa, Vanuatu.
NEIC reported an earthquake of M 4.7 in Eastern Brazil was felt with intensity up to II-III in the area(s) of Eastern Brazil at Sete Lagoas Minas Gerais.
This earthquake is located at the sixth node (60 degrees) from the Reykjanes event
and at 120 from recent strong earthquakes in Tonga and New Zealand and at 144
degrees from the Myanmar M 7.7 of March 28 and was probably promoted by
energy input from all these quakes.
The last earthquake of M>=4.7 within about 400 km of this epicenter in Brazil
occurred more than 35 years ago.
NEIC reported an earthquake of M 4.6 in Myanmar was felt with intensity up to II-III in the area(s) of Myanmar in Sintgaing, Mandalay, Patheingyi, Pyinoolwin.
EMSC reported an earthquake of M 5.0 in Antofagasta, Chile was felt with intensity up to IV in the area(s) of Antofagasta, Chile at Sierra Gorda.
EMSC reported an earthquake of M 4.0 in Turkey-Syria was felt with intensity up to IV in the area(s) of Turkey-Syria at Cubuklu, Guzelburc, Karaali Bolugu, Gokmeydan, Asagi Kepirce, Karaagac, Mustafa Kemal, Yunus Emre, and in Syria at Al Ladhiqiyah.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
3710 0451 0502 0513 C2.5 (April 3, 2025) 6.6E-04
3720 0614 0621 0623 C2.1 (April 3, 2025) 1.2E-03
3770 0815 0822 0827 C2.3 (April 3, 2025) 7.4E-04
3780 0909 0913 0915 C3.4 (April 3, 2025) 1.0E-03
3800 1018 1029 1045 C2.0 (April 3, 2025) 3.1E-03
New Ireland M 4.6 10:31 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: minor storms April 4-5 unsettled April 6. Solar M-flare chance: 70% X-class: 15% proton storm: 15%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 26 46 25 14:00 6 124 178
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 7.7 in Myanmar (white stipples) and Tonga (pink stipples)
and Earthquakes during the past day as reported by NEIC (colored circles).
DISTANCE RELATIONS FROM MYANMAR MARCH 29, 2025
Possible far-field triggering areas from the great quake of M 7.7-8.0 in
Myanmar, Southeast Asia of March 28, 2025 follow.
The magnitude of the mainshock (M 7.7-8.0) suggests extensive far-field
activity is likely with the probability of several strong far-field
earthquakes in the next week especially near the time of the eclipse of March 29.
The earthquake in Myanmar is at the fourth node (90 degrees) from the
epicenter of the M 6.8 in New Zealand of March 25 and was likely promoted
by energy from that source.
Antipodal (~180 degrees)
Myanmar to East Pacific Rise
Outer shadow zone edge (141-148 degrees)
Myanmar to Magallenes, Chile, Nicaragua, Northeast Pacific Rise, Eastern Mexico, Guatemala,
Node 8 (135 degrees)
Myanmar to Leeward Is, Virgin Is, Michoacan, Mexico,
Node 3 (120 degrees)
Myanmar to North Atlantic, Central Mid-Atlantic, Ohio, Oklahoma, SE U.S. including Tennessee and Georgia, Baja California, Northern Gulf of Mexico, South Atlantic,
P- and S- shadow zone edge and node 7 (101-110 degrees)
Myanmar to South of Africa, Washington, Oregon States, British Columbia, Alberta, Nunavit, Quebec, Eastern Canada, Montana, Central Mid-Atlantic, Northern, Kermadec Islands, Hawaii
Node 4 (90 degrees)
Myanmar to Fiji, Tonga, SE Alaska, Greenland, Baffin, South Island, New Zealand, Reykjanes Ridge, Madeira Islands,
Node 5 (72 degrees)
Myanmar to Andreanof Islands, Solomon Is, Northern France, Germany, Libya, Central Italy,
Node 6 (60 degrees)
Myanmar to Western Turkey, Ukraine, SW Australia, Kamchatka/Komandorsky Is, Crete, Greece, New Guinea,
Node 7 (52 degrees)
Myanmar to Eastern Turkey, Syria, Ethiopia, Kuril Is, Papua New Guinea, Guam,
Node 8 (45 degrees)
Myanmar to Caucasus, Central Indonesia, Hokkaido,
Preliminary expectations for far field triggering from Tonga (will be revised)
Antipodal (~180 degrees)
Tonga to Morocco,
Outer shadow zone edge (141-148 degrees)
Tonga to mid-Atlantic, Iran, Lebanon, Iceland, Azores, Turkey, Mid-Atlantic, Reykjanes Ridge,
Node 3 (120 degrees)
Tonga to Greenland, Quebec, Tajikistan, Maine, Pakistan, Afghanistan, South Africa
P- and S- shadow zone edge and node 7 (101-110 degrees)
Tonga to South Indian Ocean, Nepal, Mississippi, Ohio, Northern Peru, Colombia, South of Africa, South Sandwich Islands, Bay of Bengal, Northern Missouri, Colombia, Bouvet Island, South Carolina, Alberta, Beaufort Sea, South of Africa, Georgia, Illinois, Louisiana, British Columbia, Canada, Central Chile, Myanmar,
Node 4 (90 degrees)
Tonga to Eastern Mexico, Guatemala, Texas, South Indian Ridge, South Atlantic, South Sandwich Islands, Texas, Colorado, Idaho, Denali, Montana, British Columbia, Yukon Territory, Canada, Guatemala, Sichuan, China, Sumatra,
Node 5 (72 degrees)
Tonga to Coast of Northern California, Baja California, Rat, Near Islands, Fox Islands, Andreanof Islands, Kuril Islands, South of Sumatra, Coast of Oregon, Honshu, Kyushu, Japan, Philippines,
Node 6 (60 degrees)
Tonga to Molucca, Minahasa, Java, East Pacific Rise, New Guinea,
Node 7 (52 degrees)
Tonga to East Pacific Rise, South of Australia, Western Australia, New Guinea, Mariana Is,
NODAL EARTHQUAKES LIKELY ASSOCIATED WITH REYKJANES RIDGE
Following are expected (and observed locations following the February, 2015 quake) of
far-field seismic enhancment at nodal distances from the M 6.9 in the Reykjanes
Ridge of April 3, 2025.
Antipodal (~180 degrees)
North Atlantic to Macquarie Islands,
Outer shadow zone edge (141-148 degrees)
North Atlantic to Vanuatu, Kermadec Islands,
Node 3 (120 degrees)
North Atlantic to Sumatra, Molucca, Talaud, Halmahera,
P- and S- shadow zone edge and node 7 (101-110 degrees)
North Atlantic to Aisen, Chile, Andaman Is. Taiwan, South Sandwich Islands, Volcano Islands, Honshu, Japan,
Node 4 (90 degrees)
North Atlantic to Honshu, Japan, Central Chile,
Node 5 (72 degrees)
North Atlantic to northern Peru, Pakistan, Andreanof Islands, Southern Mid-Atlantic, Northeast Pacific Rise, Peru,
Node 6 (60 degrees)
North Atlantic to Nicaragua, Guatemala, Southern California, Alaska, Colombia, Central Mid-Atlantic, Mexico, Nevada, California, Costa Rica,
Node 7 (52 degrees)
North Atlantic to Central Mid-Atlantic, Colorado, Texas, Idaho, Montana, Washington, British Columbia
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for Myanmar (MDIS); Tonga (TDIS) and Reykjanes Ridge (RDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 4 09 10 2025 35.7 -97.4 2.8 WNW OF ARCADIA OKLAHOMA M121 T91 R48
04 4 09 04 2025 35.7 -97.4 3.0 WNW OF ARCADIA OKLAHOMA M121 T91 R48
04 4 08 31 2025 4.0 -82.6 4.8 SOUTH OF PANAMA" M154 T92 R63
04 4 08 01 2025 -15.5 -174.5 5.7 WNW OF HIHIFO TONGA M95 T4 R132
04 4 08 00 2025 -15.5 -174.6 4.5 WNW OF HIHIFO TONGA M95 T4 R132
04 4 06 59 2025 -7.9 109.1 4.7 SSE OF CILACAP INDONESIA M32 T75 R125
04 4 06 51 2025 31.5 -104.0 2.0 NW OF TOYAH TEXAS M123 T84 R54
04 4 06 49 2025 31.7 -104.2 2.3 NW OF TOYAH TEXAS M123 T84 R54
04 4 06 33 2025 31.5 -104.0 2.8 NW OF TOYAH TEXAS M123 T84 R54
04 4 06 31 2025 38.8 -122.8 4.0 NW OF THE GEYSERS M109 T75 R60
04 4 06 14 2025 31.7 -104.2 2.4 NW OF TOYAH TEXAS M123 T84 R54
04 4 04 26 2025 32.9 -117.7 2.0 WSW OF ENCINITAS CA M116 T75 R62
04 4 04 23 2025 36.8 -121.4 3.1 S OF RIDGEMARK CA M111 T75 R61
04 4 03 44 2025 29.4 52.8 4.4 NNE OF AKBARÄBÄD IRAN M39 T136 R64
04 4 03 28 2025 36.8 -121.3 2.1 TRES PINOS CA M111 T75 R61
04 4 03 07 2025 -21.2 -68.7 4.3 W OF OLLAGüE CHILE M165 T96 R80
04 4 02 36 2025 37.4 -114.3 2.6 KM SE OF CALIENTE M114 T80 R56
04 4 02 34 2025 45.5 145.5 4.7 N OF OTRADA RUSSIA M46 T75 R82
04 4 02 33 2025 -22.2 -179.5 4.5 THE FIJI ISLANDS M93 T5 R140
04 4 01 37 2025 -16.3 -72.5 4.8 EL PEDREGAL PERU M167 T94 R77
04 4 01 28 2025 31.5 -104.0 2.4 NW OF TOYAH TEXAS M123 T84 R54
04 4 01 01 2025 18.0 -68.3 3.4 DE YUMA DOMINICAN REPUBLIC M137 T110 R44
04 4 00 33 2025 -23.7 -179.9 4.6 THE FIJI ISLANDS M93 T6 R142
04 4 00 28 2025 52.6 -32.1 4.9 REYKJANES RIDGE" M93 T136 R0
04 3 23 39 2025 27.4 50.0 4.4 AL JUBAYL SAUDI ARABIA M41 T139 R64
04 3 23 20 2025 31.7 -104.5 2.0 WHITES CITY NEW MEXICO M123 T84 R55
04 3 22 57 2025 -20.6 -178.1 4.6 WNW OF HOUMA TONGA M93 T3 R138
04 3 22 18 2025 38.2 -117.8 2.3 KM SE OF MINA M112 T78 R58
04 3 22 10 2025 32.3 -104.7 3.4 WHITES CITY NEW MEXICO M122 T84 R54
04 3 21 49 2025 52.4 -31.5 4.8 NORTHERN MID-ATLANTIC RIDGE" M92 T136 R0
04 3 21 47 2025 43.2 -126.3 3.6 W OF BANDON OREGON M104 T76 R59
04 3 21 30 2025 35.3 -117.8 2.1 WSW OF JOHANNESBURG CA M114 T76 R60
04 3 21 11 2025 -28.4 -177.9 5.1 KERMADEC ISLANDS REGION" M97 T8 R144
04 3 21 00 2025 18.3 -65.9 3.4 DEL RIO PUERTO RICO M136 T112 R43
04 3 20 58 2025 -22.0 -68.6 5.0 NNE OF CALAMA CHILE M165 T95 R80
04 3 20 38 2025 31.6 -104.0 2.1 NNW OF TOYAH TEXAS M123 T84 R54
04 3 20 20 2025 39.1 -119.0 2.3 KM ENE OF YERINGTON M111 T78 R58
04 3 19 20 2025 39.0 -123.2 2.4 SE OF BOONVILLE CA M109 T75 R60
04 3 18 42 2025 14.3 146.8 5.1 VILLAGE NORTHERN MARIANA ISLAN M48 T51 R113
04 3 18 11 2025 38.8 -122.8 2.3 THE GEYSERS CA M109 T75 R60
04 3 17 59 2025 -23.5 -179.8 4.3 THE FIJI ISLANDS M93 T6 R141
04 3 17 56 2025 52.7 -34.9 4.7 REYKJANES RIDGE" M94 T134 R1
04 3 17 42 2025 -23.2 -179.9 4.4 THE FIJI ISLANDS M93 T6 R141
04 3 16 05 2025 52.7 -35.0 5.4 REYKJANES RIDGE" M94 T134 R1
04 3 15 22 2025 35.3 -118.6 2.4 NW OF TEHACHAPI CA M114 T76 R60
04 3 14 54 2025 52.5 -32.5 4.6 REYKJANES RIDGE" M93 T136 R0
04 3 14 39 2025 52.6 -34.8 4.6 REYKJANES RIDGE" M94 T134 R1
04 3 14 29 2025 40.2 -124.7 2.6 W OF PETROLIA CA M107 T75 R60
04 3 14 09 2025 52.5 -32.1 6.9 REYKJANES RIDGE" M93 T136 R0
04 3 13 58 2025 -17.7 168.1 4.9 W OF PORT-VILA VANUATU M80 T17 R141
04 3 13 42 2025 0.6 121.6 4.7 W OF GORONTALO INDONESIA M32 T66 R122
04 3 13 11 2025 31.7 -101.7 2.1 GARDEN CITY TEXAS M124 T86 R53
04 3 12 58 2025 31.7 -101.7 3.4 GARDEN CITY TEXAS M124 T86 R53
04 3 11 53 2025 41.2 -116.7 2.6 KM NE OF VALMY M110 T80 R55
04 3 11 07 2025 38.7 -108.5 3.2 W OF DELTA COLORADO M115 T84 R52
04 3 10 31 2025 -4.6 153.4 4.6 KOKOPO PAPUA NEW GUINEA M62 T35 R131
04 3 09 48 2025 38.8 -122.8 2.1 WNW OF COBB CA M109 T75 R60
04 3 07 16 2025 35.7 -91.7 1.5 SW OF BATESVILLE ARKANSAS M122 T95 R44
04 3 07 02 2025 -5.8 -50.5 4.7 WNW OF PARAUAPEBAS BRAZIL M143 T118 R60
04 3 05 16 2025 12.2 -87.8 4.5 SSW OF JIQUILILLO NICARAGUA M145 T90 R59
04 3 04 37 2025 54.3 -162.8 3.6 FALSE PASS ALASKA M78 T74 R65
04 3 04 18 2025 -65.1 178.6 5.6 BALLENY ISLANDS REGION" M106 T45 R160
04 3 04 10 2025 56.1 -156.5 3.0 ALASKA PENINSULA M81 T77 R62
04 3 03 47 2025 23.2 120.4 4.6 WNW OF YUJING TAIWAN M22 T77 R100
04 3 01 26 2025 36.5 -121.1 2.0 W OF PINNACLES CA M112 T75 R61
04 3 01 19 2025 33.5 -82.3 2.0 NW OF GROVETOWN GEORGIA M124 T102 R40
04 3 00 59 2025 39.7 -119.9 2.8 NE OF COLD SPRINGS M110 T78 R58
04 3 00 41 2025 49.0 -122.4 2.3 ALDERGROVE EAST CANADA M101 T82 R53
04 3 00 33 2025 34.1 -117.3 2.0 LOMA LINDA CA M115 T76 R60
April 3, 2025
The strongest earthquake in the world today was an M 6.2 (EMSC) to 6.4 (BGS) in Kyushu, Japan. NEIC reported it was felt with intensity VI in Kanoya, Kagoshima, Japan; V in Miyazaki and II-III in Kumamoto, Oita and Chiba Prefectures.
No tsunami was observed or expected. This is the strongest earthquake in the
Kyushu area of Japan within about 200 km of this epicenter since an M 6.8 on January 13, 2025
and is the largest aftershock to date of that event.
"A strong to major earthquake of M 6.8-6.9 hit the area of Kyushu, Japan today. The
quake shook buildings and may have generated a tsunami, but no reports of
major damage or high tsunami waves have been officially made. The largest
tsunami wave was measured at 7.8 inches in Miyazaki City. The quake
was felt in Miyazaki and at least one minor injury was reported by a person who
fell down a flight of stars during the quake. The tsunami warning has been
lifted. NEIC reported this earthquake was felt with intensity IV (Some damage) at Miyazaki, VII in Saiki, Oita; VI in Junitomi, Miyazaki; V in Kanoya, Kagoshima dns Koshi, Kumamoto and with IV in Oita, Osaka, Ehime Fukuoka, Hiroshima, Kagoshima, Shizuoka, South Korea.
Eruptions of Sakurajima Volcano are expected after the M 6.9 to increase in
frequencies and amplitude. Sakurajima is located in Kyushu and is among the
most active volcanoes in Japan. This epicenter in Kyushu is at the sixth node (60 degrees) from the M 7.4 in Vanuatu of December 17, 2024
and may have been promoted by energy from that source. It is also at 108 degrees
from Michoacan, Mexico where an M 6.2 occurred earlier in the day. This is in the
zone where core-mantle reflections of seismic waves return to the surface and
appear to help trigger enhanced seismicity at this distance from mainshocks.
...
The last earthquake of M>=6.8 in the area of Kyushu, Japan within about 200 km of today's
epicenter occurred on August 8, 2024 with M 7.1 and today's event may be an
aftershock of that. An M 7.0 also hit the region on April 15, 2016." (January 13, 2025)
This epicenter, like an M 5.5 in the Near Islands, Alaska today, is located
at the fifth node from Tonga (M 7.1, March 30) and at the eleventh node (32.9 degrees)
from Myanmar and may have been promoted by energy from those sources.
A strong M 5.9-6.3 earthquake was felt in the area of the Molucca Sea today. NEIC reported
it was felt with intensity III in Manado, Sulawesi, Indonesia.
Today's epicenter is located at the sixth node (60 degrees) from Tonga (M 7.1, March 30)
and New Zealand (M 6.8 Mar. 28) and at the tenth node (36.0 degrees) from Myanmar (M 7.7, Mar. 28) and was
probably promoted by energy from those sources.
BMG gave the following parameters for this event:
O: 02APR2025 21:03:43 2.1N 126.7E ML=6.0 BMG Molucca Sea, Indonesia
O: 02APR2025 21:03:39 2.2N 126.7E ML=6.3 RSSC Molucca Sea, Indonesia
An earthquake of M 5.6 occurred today south of New Zealand in the Balleny Islands. It was not reported felt in this remote area.
The last earthquake within about 250 km of today's epicenter in the Balleny Islands
with M>=5.6 occurred as an M 5.8 on December 28, 2023. When an M 5.6 hit the
area on January 3, 2023 this summary noted:
"The only earthquake with M>=5.8 within about 400 km of this epicenter in the past 15 years was an
M 6.0 on February 2, 2018. A series of events in this area of M 5.8 on Marcy 9, 2004 and July 16, 2004 (M 6.1)
also occurred in the past 35 years. Similar events of M 5.8 hit the area on September 23, 1997 and September 9, 1998.
At the time of the M 6.0 on February 2, 2018, this summary noted in this regard:
"A strong M 6.0 earthquake under Scott Island Bank, Antarctica today was
followed by an aftershock of M 5.2 more than an hour later. These events were
not reported felt in this remote area. They occurred within about 30 minutes
of local solar midnight and were probably related to high tidal stresses associated
with the full moon of January 31. The timing in mid-summer on or near the Scott
Ice Cap also suggests they may have been related to a glacial sea-ice calving
event in the area, but this is not confirmed. At the least, they may open
cracks in the ice which can destabilize it. Earthquakes in this area of Antarctica
are rare. The last with M>=6 within about 500 km of this epicenter occurred
on December 24, 2010 (M 6.0)." (February 2, 2018)
Today's epicenter is located at the eigth node (45 degrees) from Tonga (M 7.1, March 30)
and the seventh node (106 degrees) from Myanmar (M 7.7, Mar. 28) and was
probably promoted by energy from those sources.
O: 03APR2025 04:18:19 65.1S 178.6E ML=5.6 NEIC Balleny Islands
The strongest earthquake in the U.S. or Canada today was an M 5.5 (EMSC) to M 5.8 (RSSC) in the Near Islands, Alaska. NEIC reported it may have been felt with intensity up to IV in the epicentral area.
The last earthquake in the Near Islands, Alaska with M>=5.5 within about 200 km
of today's epicenter occurred on December 29, 2021 with M 5.7. The last of significantly
larger magnitude in the area was an M 6.8 on June 2, 2017. At the time this summary
noted:
"An earthquake of M 5.7 also occurred in the Near Islands, Aleutians, Alaska today. It was not reported felt in this remote area.
This is the strongest earthquake in the Near Islands within about 200 km of this
epicenter since an M 6.8 on June 2, 2017. An M 7.7 west of this epicenter occurred
in the Komandorsky Islands on July 17, 2017 following an M 6.3 foreshock." (December 29, 2021)
Today's epicenter is located at the fifth node (72 degrees) from the M 7.1 in Tonga and near
100 degrees from the M 6.8 in New Zealand and may have been promoted by
energy from those sources.
NEIC reported an earthquake of M 4.6 in Taiwan was felt with intensity up to II-III in the area(s) of Taiwan in Chiayi, Tainan and Taoyuan Counties.
This epicenter is near the ninth node (80 degrees) from New Zealand and Tonga
and was probably promoted by energy from those sources.
NEIC reported an earthquake of M 2.8 in western Nevada was felt with intensity up to II-III in the area(s) of western Nevada at Sparks and Reno and in Chilcoot, California.
This epicenter is near the ninth node (80 degrees) from Tonga and 108 degrees from New Zealand
and was probably promoted by energy from those sources.
NEIC reported an earthquake of M 2.8 in Central California was felt with intensity up to IV in the area(s) of Central California at Salinas.
NEIC reported an earthquake of M 5.0 south of Myanmar was felt with intensity up to II-III in the area(s) of Myanmar in Myanmar at Rangoon and Syriam and in Bangkok, Thailand.
This is a regional aftershock of the M 7.7 in Myanmar of March 28 being nearly 700 km
south of that epicenter. It is located at the fourth node (90 degrees)
from the M 6.8 in New Zealand and may have been promoted by energy from that source.
A new observation related to the earthquake of M 7.7 in Myanmar emerged as
a video on the web today. The video shows a wall of water surging through the
strees in Ruili, Yunnan, China. While the tidal wave hit about 1.5 hours
after the M 7.7 mainshock, it has been hypothesized it was caused by a ruptured water reservoir
in the area. Casualties with this tidal wave were not reported.
CSN reported an M 4.0 in Coquimbo Chile today with the following parameters:
03-04-2025 03:46 29.90S 71.50W 59 4.0 IV Coquimbo at Andacoollo; III in La Serena, La Higuera, Coquimbo and Rio Hurtado, Chile.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
3240 0115 0126 0143 C2.3 (April 2, 2025) 3.8E-03
3260 0143 0147 0150 C2.0 (April 2, 2025) 1.1E-03
Mindanao M 4.6 01:52 UT
3310 0445 0449 0451 C1.6 (April 2, 2025) 7.3E-04
3360 0621 0632 0644 C1.9 (April 2, 2025) 2.5E-03
3370 0711 0716 0718 C1.8 (April 2, 2025) 8.8E-04
3390 1011 1019 1023 C2.0 (April 2, 2025) 9.3E-04
3410 1039 1053 1114 C8.0 (April 2, 2025) 2.6E-03
Myanmar M 4.7 10:45 UT
Thailand M 3.5 10:49 UT
3520 1114 1124 1127 C6.2 (April 2, 2025) 5.5E-03
Fiji M 4.8 11:36 UT
3530 1424 1430 1432 C2.2 (April 2, 2025) 9.9E-04
3620 2008 2028 2039 C2.6 (April 2, 2025) 7.7E-04
3640 2239 2248 2251 C3.0 (April 2, 2025) 8.2E-04
3660 2308 2315 2323 C1.7 (April 2, 2025) 1.6E-03
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 3 minor storms April 4-5. Solar M-flare chance: 70% X-class: 15% proton storm: 15%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 22 29 16 08:00 5 158 180
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 7.7 in Myanmar (white stipples) and Tonga (pink stipples)
and Earthquakes during the past day as reported by NEIC (colored circles).
DISTANCE RELATIONS FROM MYANMAR MARCH 29, 2025
Possible far-field triggering areas from the great quake of M 7.7-8.0 in
Myanmar, Southeast Asia of March 28, 2025 follow.
The magnitude of the mainshock (M 7.7-8.0) suggests extensive far-field
activity is likely with the probability of several strong far-field
earthquakes in the next week especially near the time of the eclipse of March 29.
The earthquake in Myanmar is at the fourth node (90 degrees) from the
epicenter of the M 6.8 in New Zealand of March 25 and was likely promoted
by energy from that source.
Antipodal (~180 degrees)
Myanmar to East Pacific Rise
Outer shadow zone edge (141-148 degrees)
Myanmar to Magallenes, Chile, Nicaragua, Northeast Pacific Rise, Eastern Mexico, Guatemala,
Node 8 (135 degrees)
Myanmar to Leeward Is, Virgin Is, Michoacan, Mexico,
Node 3 (120 degrees)
Myanmar to North Atlantic, Central Mid-Atlantic, Ohio, Oklahoma, SE U.S. including Tennessee and Georgia, Baja California, Northern Gulf of Mexico, South Atlantic,
P- and S- shadow zone edge and node 7 (101-110 degrees)
Myanmar to South of Africa, Washington, Oregon States, British Columbia, Alberta, Nunavit, Quebec, Eastern Canada, Montana, Central Mid-Atlantic, Northern, Kermadec Islands, Hawaii
Node 4 (90 degrees)
Myanmar to Fiji, Tonga, SE Alaska, Greenland, Baffin, South Island, New Zealand, Reykjanes Ridge, Madeira Islands,
Node 5 (72 degrees)
Myanmar to Andreanof Islands, Solomon Is, Northern France, Germany, Libya, Central Italy,
Node 6 (60 degrees)
Myanmar to Western Turkey, Ukraine, SW Australia, Kamchatka/Komandorsky Is, Crete, Greece, New Guinea,
Node 7 (52 degrees)
Myanmar to Eastern Turkey, Syria, Ethiopia, Kuril Is, Papua New Guinea, Guam,
Node 8 (45 degrees)
Myanmar to Caucasus, Central Indonesia, Hokkaido,
Preliminary expectations for far field triggering from Tonga (will be revised)
Antipodal (~180 degrees)
Tonga to Morocco,
Outer shadow zone edge (141-148 degrees)
Tonga to mid-Atlantic, Iran, Lebanon, Iceland, Azores, Turkey, Mid-Atlantic, Reykjanes Ridge,
Node 3 (120 degrees)
Tonga to Greenland, Quebec, Tajikistan, Maine, Pakistan, Afghanistan, South Africa
P- and S- shadow zone edge and node 7 (101-110 degrees)
Tonga to South Indian Ocean, Nepal, Mississippi, Ohio, Northern Peru, Colombia, South of Africa, South Sandwich Islands, Bay of Bengal, Northern Missouri, Colombia, Bouvet Island, South Carolina, Alberta, Beaufort Sea, South of Africa, Georgia, Illinois, Louisiana, British Columbia, Canada, Central Chile, Myanmar,
Node 4 (90 degrees)
Tonga to Eastern Mexico, Guatemala, Texas, South Indian Ridge, South Atlantic, South Sandwich Islands, Texas, Colorado, Idaho, Denali, Montana, British Columbia, Yukon Territory, Canada, Guatemala, Sichuan, China, Sumatra,
Node 5 (72 degrees)
Tonga to Coast of Northern California, Baja California, Rat, Near Islands, Fox Islands, Andreanof Islands, Kuril Islands, South of Sumatra, Coast of Oregon, Honshu, Kyushu, Japan, Philippines,
Node 6 (60 degrees)
Tonga to Molucca, Minahasa, Java, East Pacific Rise, New Guinea,
Node 7 (52 degrees)
Tonga to East Pacific Rise, South of Australia, Western Australia, New Guinea, Mariana Is,
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order. Distances from major recent earthquakes (in degrees)
are added at the end of the earthquake data line. These include in this
listings distances to the nearest degree between the event and the previous
mainshock as for Myanmar (MDIS); Tonga (TDIS) and New Zealand (ZDIS).
Earthquakes are considered nodal if they occur within about 2 degrees of
nodes (360/n*m) where n and m are small integers. For example in the current model an earthquake
would be considered possibly nodal at node 3 if it occurs at 117.5-122.5 degrees
from a mainshock.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION DISTANCES FROM LARGE EQ
N+S- E+W- Mainsdist Mainsdist Mainsdist
04 3 05 16 2025 12.2 -87.8 4.5 SSW OF JIQUILILLO NICARAGUA M145 T90 Z109
04 3 04 37 2025 54.3 -162.8 3.6 FALSE PASS ALASKA M78 T74 Z104
04 3 04 18 2025 -65.1 178.6 5.6 BALLENY ISLANDS REGION" M106 T45 Z19
04 3 04 10 2025 56.0 -156.5 3.1 ALASKA PENINSULA M81 T77 Z107
04 3 03 47 2025 23.2 120.4 4.6 WNW OF YUJING TAIWAN M22 T77 Z80
04 3 01 26 2025 36.5 -121.1 2.0 W OF PINNACLES CA M112 T75 Z105
04 3 00 59 2025 39.7 -119.9 2.8 NE OF COLD SPRINGS M110 T78 Z108
04 2 22 34 2025 40.3 -125.0 2.8 W OF PETROLIA CA M107 T75 Z106
04 2 22 22 2025 34.5 -119.0 2.0 NNW OF FILLMORE CA M114 T75 Z105
04 2 21 42 2025 31.1 131.4 4.7 SSE OF KUSHIMA JAPAN M32 T73 Z83
04 2 21 06 2025 -16.7 -173.5 4.9 SSE OF HIHIFO TONGA M96 T3 Z34
04 2 21 04 2025 39.5 -119.5 2.2 KM NW OF STAGECOACH M110 T78 Z108
04 2 21 03 2025 2.2 126.7 6.3 MOLUCCA SEA, INDONESIA M35 T62 Z59
04 2 21 03 2025 2.1 126.8 5.9 WNW OF TOBELO INDONESIA M35 T62 Z59
04 2 21 03 2025 2.1 126.7 6.0 MOLUCCA SEA, INDONESIA M35 T62 Z59
04 2 20 16 2025 36.0 -120.7 2.8 NE OF BRADLEY CA M112 T75 Z105
04 2 18 45 2025 3.3 128.2 4.3 N OF TOBELO INDONESIA M36 T61 Z59
04 2 18 01 2025 24.1 121.6 4.3 HUALIEN CITY TAIWAN M23 T76 Z81
04 2 17 43 2025 41.9 -119.6 2.4 E OF FORT BIDWELL M108 T79 Z110
04 2 17 14 2025 35.4 -117.8 2.2 W OF JOHANNESBURG CA M114 T76 Z106
04 2 16 27 2025 15.5 95.6 5.0 PYAPON BURMA (MYANMAR) M6 T95 Z88
04 2 16 26 2025 53.3 172.8 5.5 ATTU STATION ALASKA M64 T74 Z99
04 2 15 58 2025 48.3 -124.6 2.1 NEAH BAY WASHINGTON M101 T81 Z112
04 2 15 45 2025 -6.5 128.0 4.3 LOSPALOS TIMOR LESTE M42 T57 Z51
04 2 15 35 2025 -22.9 -66.6 4.3 ABRA PAMPA ARGENTINA M163 T97 Z96
04 2 14 03 2025 31.0 131.5 6.2 ENE OF NISHINOOMOTE JAPAN M32 T73 Z83
04 2 13 58 2025 -18.2 -175.0 4.3 WNW OF NEIAFU TONGA M95 T2 Z32
04 2 13 24 2025 0.7 -29.6 5.2 CENTRAL MID-ATLANTIC RIDGE" M122 T140 Z132
04 2 11 36 2025 -22.2 -179.5 4.8 THE FIJI ISLANDS M93 T5 Z27
04 2 10 45 2025 20.9 96.1 4.7 MEIKTILA BURMA (MYANMAR) M1 T97 Z92
04 2 10 22 2025 40.6 -119.0 2.4 BLACK ROCK CITY M109 T79 Z109
04 2 08 03 2025 41.2 -116.7 2.6 KM NE OF VALMY M110 T80 Z111
04 2 07 46 2025 45.6 -111.8 2.4 SSE OF PONY MONTANA M108 T86 Z116
04 2 07 38 2025 38.8 -122.8 2.0 THE GEYSERS CA M109 T75 Z106
04 2 07 29 2025 18.8 -64.5 3.4 BAY U.S. VIRGIN ISLANDS M135 T113 Z130
04 2 07 24 2025 41.2 -116.7 2.0 KM NE OF VALMY M110 T80 Z111
04 2 06 52 2025 18.3 -68.0 3.6 PUNTA CANA DOMINICAN REPUBLIC M136 T110 Z127
04 2 06 15 2025 41.2 -116.7 2.1 KM NE OF VALMY M110 T80 Z111
04 2 05 43 2025 37.9 -122.2 2.8 W OF ORINDA CA M110 T75 Z105
04 2 05 21 2025 29.0 -98.0 2.9 FALLS CITY TEXAS M127 T88 Z114
04 2 05 10 2025 35.3 -117.8 2.2 WSW OF JOHANNESBURG CA M114 T76 Z106
04 2 04 41 2025 41.9 -119.6 2.2 E OF FORT BIDWELL M108 T79 Z110
04 2 04 35 2025 26.0 128.5 4.7 ESE OF KATSUREN-HAEBARU JAPAN M30 T72 Z79
04 2 03 59 2025 19.1 -68.1 3.6 PUNTA CANA DOMINICAN REPUBLIC M136 T110 Z128
04 2 03 44 2025 -12.2 167.1 4.5 NNW OF SOLA VANUATU M77 T19 Z34
04 2 03 38 2025 29.0 -98.0 2.1 FALLS CITY TEXAS M127 T88 Z114
04 2 02 55 2025 18.9 -65.2 3.4 AMALIE U.S. VIRGIN ISLANDS M135 T113 Z129
04 2 01 11 2025 35.9 -117.7 2.1 LITTLE LAKE CA M114 T77 Z106
04 2 00 59 2025 -20.4 -173.7 5.0 SE OF PANGAI TONGA M97 T0 Z31
04 2 00 42 2025 40.4 -125.0 3.3 WNW OF PETROLIA CA M107 T75 Z106
04 2 00 29 2025 -56.9 -142.2 6.3 PACIFIC-ANTARCTIC RIDGE" M125 T43 Z32
04 2 00 22 2025 3.2 97.5 4.4 SE OF BLANGPIDIE INDONESIA M18 T89 Z77
04 2 00 20 2025 -10.2 161.4 4.5 KIRAKIRA SOLOMON ISLANDS M71 T25 Z36
04 2 00 19 2025 28.5 87.1 4.3 NNE OF LOBUCHE NEPAL M10 T107 Z103
04 2 00 01 2025 41.2 -116.7 3.3 NEVADA M110 T80 Z111
April 2, 2025
New toll statistics have been for casualties associated with the M 7.7 in
Myanmar of March 28, 2025. Chinese TV identifies 2719 dead, 4500 injured with more than
3000 likely dead. Myanmar State Media reports about 2700 dead including 50 preschoolers and 2 teachers who died when their preschool collapsed -
but cautions that the civil war is preventing efficient search and rescue
efforts from proceeding. In Bangkok, Thailand official figures show 20 dead
and 74 still missing beneath piles of debris.
The largest aftershock in Myanmar today was an M 5.0 which NEIC reported was felt with
intensity IV in Rangoon, Myanmar and II in Pyinmana and Sagaing and in Bangkok and Bang Sao Thong, Thailand.
EMSC reported jerks at Reykjavik, Kopavogur, Selfoss, Iceland.
A strong eruption of Grindavik Volcano in southern Iceland began today.
It was apparently promoted by the second strongest solar flare in the past month
which coincided with the initial eruption (see below). After several hours moderate earthquakes
includeing those of M 5.2 and 4.9 occurred. NEIC reported the M 5.2 was felt
with intensity up to VI in Sudurnes, Iceland at Keflavik and IV in Seltjarnarnes; III in Kopavogur, Reykjavik, Akranes and II in Slefoss.
The earthquake of M 5.2 is the strongest within about 200 km in this area of
Iceland since an M 5.4 on July 31, 2022. The last of significantly larger magnitude
in Iceland was an M 6.2 on May 29, 2008. At the time of the July, 2022 event
this summary noted:
"The strongest earthquake felt in the world today was an M 5.4 in Iceland. It was felt with maximum intensity VI in Suournes at Grindavik and IV in Vogar, Njarovik, Keflavik, Alftanes and Kooavogur and III in Garbour.
This continues a series of earthquakes in this area which began with the new moon
on July 30 as noted in the previous issue of this summary:
"A series of light to moderate earthquakes occurred in southern Iceland today.
These were felt in the same region where a volcanic eruption of Fagradalsfjall
Volcano occurred late in 2021. Most of today's events were at a deeper focus
and did not suggest an imminent volcanic eruption but a new eruption seems
likely in the next several days. Today's activity occurred beginning at
local solar noon with an M 3.6 and was probably promoted by high tidal stresses
associated with the new moon of July 28 as noted ..." (July 31, 2022)
An eruption of Grindavik Volcano in Iceland is deemed imminent by local authorities. It has been preceded by
an energetic swarm of earthquakes across much of southwestern Iceland.
Due to the large amount of stored lava officials warn this eruption could be
much larger than previous ones. Lava has begun to flow near Reykjavik, Iceland's capital and many local communities
have been evacuated. The famous Blue Lagoon Spa and the town of Frindavik have been
evacuated. Shortly after the evacuatioins and while this issue was going to press,
the volcano did erupt with flames and smoke and flowing lava. The open fissure
is continuing to extend to the south. Damag to a hot water pipeline in northern
Grindavik was reported. According to press accounts, the eruption began about 06:30 UT
This epicenter is at the ninth node from Myanmar and at the third node (120 degrees)
from TC Courtney and may have been promoted by energy from those sources.
This eruption was probably triggered by a strong M5.6 class solar flare, the
second strongest in the past month after a X1.1 on March 28, 2025 (SWPC #1760).
Several flares of similar size to today's occurred in early February, 2025
(M8.8, M7.6, M7.5, M 5.8 - February 3-7, 2025) and an X2.0 occurred on February 23, 2025 (#5990).
So, this flare of M5.6 is a significant flare. Data for this and a second
M-class flare later in the day from SWPC follow.
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
2880 0630 0646 0653 M5.6 (April 1, 2025) 3.1E-02
Start of Gridavik Volcanic Eruption ~ 06:30 UT
3220 2218 2231 2241 M2.5 (April 1, 2025) 2.1E-02
Pacific-Antarctic M 6.3 00:29 UT
Given the significance of the M5.6 flare today and the fact that it coincided
with the eruption of Grindavik Volcano near 06:30 UT is a significant
simultaneous occurrence and is likely a case of solar flare effects (SFE)
triggering.
A second strong solar flare of M2.5 (#3220 see list above) occurred while longitudes in the
central Pacific (130-170 West) were near local solar noon - a time when
solar flares are most geoeffective. So, it should come to no surprise that
the strongest earthquake of the day was an M 6.3 on the Pacific-Antarctic
Ridge (at 142W longitude) was near local solar noon at the time of this flare.
While it occurred about two hours after the flare it is most likely
triggered by SFE from flare 3220.
The last earthquake in this area of the Pacific-Antarctic Ridge with M>=6.3
was recorded by NEIC as occurring on October 30, 2010 with M 6.3. Other
events in the area of equal or larger magnitude in the past 35 years all
occurred with M 6.3 - on May 12, 2005; October 11, 1998 and August 23, 1995.
At the time of the M 6.3 on October 30, 2010 this summary noted:
"The strongest earthquake of the day was an M 6.4 in the South Pacific
Ocean on the Pacific-Antarctic Ridge. This is a remote region and the
earthquake was probably not felt in the region. This type of earthquake
(transform) seldom triggers a tsunami and none was expected with this
event. In the past 20 years two earthquakes have hit the Pacific-Antarctic
Ridge with M>=6.4 - an event of M 5.5 on August 6, 2001 and an M 6.5 on May 12,
2005. Both were to the east of today's epicenter." (October 30, 2010)
A pair of light earthquakes occurred in the San Francisco Bay area of California today with M 2.9 and M 2.8. NEIC reported the M 2.8 was felt with intensity IV in Dublin, Walnut Creed and III in San Francisco, Benicia, Lafayette, Walnut Creek, Oakland, Emeryville, Berkeley, Albany, and Tracy with lesser shaking as far as about 50 km from the epicenter.
NEIC reported felt intensities for the M 2.9 in the San Francisco area with intensity III in Danville, Alamo, Dublin, San Ramon, Sunol, Walnut Creek, Oakland, Berkeley, Novato, Daly City, San Francisco.
A strong earthquake also occurred today as an M 5.7-6.3 in Timor, Banda Sea, Indonesia. NEIC reported it was felt with intensity III in Suai Cova Lima, Dili, East Timor and in the Northern Territory of Australia at Conawarra and Darwin with intensity II-III.
EMSC reported moderate to strong shaking in Kota Lama, Kupang, Dili, Timor.
This epicenter is at the eighth node (45 degrees) from the Myanmar quake of
March 28 and may have been promoted by energy from that source.
BMG gave the following data for this event:
O: 01APR2025 10:15:54 7.7S 128.6E ML=6.3 BMG Timor, Indonesia
NEIC reported earthquakes of M 2.9 and M 2.8 in Southern Texas were felt with intensity up to II-III in the area(s) of Southern Texas at Falls City.
NEIC reported an earthquake of M 3.3 off northern California was felt with intensity up to II-III in the area(s) of northern California at Arcata.
NEIC reported an earthquake of M 5.0 in Ryukyu Islands, Japan was felt with intensity up to II-III in the area(s) of Ryukyu Islands, Japan in Okinawa at Ishikawa and Yomitan.
NEIC reported an earthquake of M 4.6 in Afghanistan was felt with intensity up to II in the area(s) of Afghanistan in Pakistan at Abottabad and Bat Khela North-West Frontier.
EMSC reported moderate shaking in Shuroobod and Doghiston, Tajikistan, and in Kabul, Afghanistan.
NEIC reported an earthquake of M 2.6 in Central California was felt with intensity up to II-III in the area(s) of Central California at California City.
NEIC reported an earthquake of M 3.7 in Southern Alaska was felt with intensity up to II-III in the area(s) of Southern Alaska with III in Matanuska-Susitna Borough and II in Chugiak.
NEIC reported an earthquake of M 4.8 in Southern Myanmar was felt with intensity up to II-III in the area(s) of Southern Myanmar with V at Pyinmana and IV in Mandalay.
NEIC reported an earthquake of M 3.0 in Central California was felt with intensity up to II-III in the area(s) of Central California at Pahrump, Nevada.
PHIVOLCS reported an earthquake of M 4.6 in Northern Mindanao, Philippines was felt with intensity up to IV in the area(s) of Northern Mindanao, Philippines with I in Dapa, Surigao del Norte.
PHIVOLCS reported an earthquake of M 5.0 in Mindoro, Philippines was felt with intensity up to IV in the area(s) of Northern Mindanao, Philippines with I Mindoro at Lubang, Paluan, Mamburao and Santa Cruz, Occidental Mindoro.
No tropical cyclones are currently active
SOLAR FLARES
Flare # START MAX END CLASS DATE Flux (Jm-2)
-------------------------------------------------------------------------
2820 0123 0132 0137 C3.2 (April 1, 2025) 1.1E-03
2830 0258 0306 0330 C3.6 (April 1, 2025) 6.5E-03
Greenland Sea M 3.1 02:57 UT
3050 0330 0335 0339 C2.8 (April 1, 2025) 1.1E-03
2880 0630 0646 0653 M5.6 (April 1, 2025) 3.1E-02
Start of Gridavik Volcanic Eruption ~ 06:30 UT
2910 0747 0755 0802 C5.3 (April 1, 2025) 3.6E-03
Iceland M 3.0-3.6 07:52 - 08:08 UT
2990 1031 1040 1046 C5.8 (April 1, 2025) 3.0E-03
Myanmar M 5.0 11:01 UT
Iceland M 3.1 ... 10:36 UT
Azores M 2.2, 2.3 1042 UT
3040 1458 1502 1511 C2.1 (April 1, 2025) 1.6E-03
3110 1644 1652 1658 C3.5 (April 1, 2025) 2.6E-03
Iceland M 4.9, 4.6, 5.2 16:58, 16:57, 1654 UT
Iceland M 3.5 16:45 UT
Veracruz, Mexico M 3.8 16:47 UT
3160 1835 1843 1850 C3.1 (April 1, 2025) 2.4E-03
Fiji M 4.6 18:46 UT
3170 1929 1939 1945 C4.1 (April 1, 2025) 3.2E-03
3200 2045 2100 2105 C5.2 (April 1, 2025) 6.6E-03
3230 2105 2110 2112 C5.2 (April 1, 2025) 3.1E-03
3210 2200 2208 2218 C3.5 (April 1, 2025) 7.8E-04
Kuril M 4.1 22:04 UT
3220 2218 2231 2241 M2.5 (April 1, 2025) 2.1E-02
Pacific-Antarctic M 6.3 00:29 UT
* indicates analog reading from graph provided by SWPC
GEOMAGNETIC FIELD: active April 2 quiet April 3 minor storms April 4. Solar M-flare chance: 75% X-class: 25% proton storm: 60%
AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 5 2 5 21:00 2 147 182
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:37:40 UT (#250331C). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 31, 2025 at 04:19:43 UT (#250331B). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 30, 2025 at 06:07 38 UT (#250330A). A preliminary UVOT Magnitude was assigned to this GRB at V>20.0.
A strong Gamma Ray Burst was recorded by SWIFT on March 27, 2025 at 07:30:04 UT (#250327A). A preliminary UVOT Magnitude was not assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 22, 2025 at 16:06:12 UT (#250322A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 21, 2025 at 00:42:38 UT (#250321A). A preliminary UVOT Magnitude of V>18.9 was assigned to this GRB.
A strong Gamma Ray Burst was recorded by SWIFT on March 12, 2025 at 13:24:17 UT (#250312A). A preliminary UVOT Magnitude was not assigned to this GRB.
Earthquake associated with this flare included an M 2.2 in Central California;
an M 4.7 in Halmahera, Indonesia and an M 2.6 in New South Wales, Australia.
A strong Gamma Ray Burst was recorded by SWIFT on March 6, 2025 at 16:30:08 UT (#250306A). A preliminary UVOT Magnitude was not assigned to this GRB.
The strongest earthquake in the world in the past month (since February 8, 2025) coincided with this GRB - an M 6.1 on March 6 at 16:22 UT and was possibly promoted by this GRB.
An aftershock of this of M 4.7 in Antofagasta, Chile occurred at 16:33 UT on March 6.
The area of Chile was nearly exactly sub-solar at the time of this GRB and
earthquake.
The current earthquakes map contains expected distances at which enhanced seismicity is
likely at this time due to the M 7.7 in Myanmar (white stipples) and Tonga (pink stipples)
and Earthquakes during the past day as reported by NEIC (colored circles).
DISTANCE RELATIONS FROM MYANMAR MARCH 29, 2025
Possible far-field triggering areas from the great quake of M 7.7-8.0 in
Myanmar, Southeast Asia of March 28, 2025 follow.
The magnitude of the mainshock (M 7.7-8.0) suggests extensive far-field
activity is likely with the probability of several strong far-field
earthquakes in the next week especially near the time of the eclipse of March 29.
The earthquake in Myanmar is at the fourth node (90 degrees) from the
epicenter of the M 6.8 in New Zealand of March 25 and was likely promoted
by energy from that source.
Antipodal (~180 degrees)
Myanmar to East Pacific Rise
Outer shadow zone edge (141-148 degrees)
Myanmar to Magallenes, Chile, Nicaragua, Northeast Pacific Rise, Eastern Mexico, Guatemala,
Node 8 (135 degrees)
Myanmar to Leeward Is, Virgin Is, Michoacan, Mexico,
Node 3 (120 degrees)
Myanmar to North Atlantic, Central Mid-Atlantic, Ohio, Oklahoma, SE U.S. including Tennessee and Georgia, Baja California, Northern Gulf of Mexico, South Atlantic,
P- and S- shadow zone edge and node 7 (101-110 degrees)
Myanmar to South of Africa, Washington, Oregon States, British Columbia, Alberta, Nunavit, Quebec, Eastern Canada, Montana, Central Mid-Atlantic, Northern, Kermadec Islands, Hawaii
Node 4 (90 degrees)
Myanmar to Fiji, Tonga, SE Alaska, Greenland, Baffin, South Island, New Zealand, Reykjanes Ridge, Madeira Islands,
Node 5 (72 degrees)
Myanmar to Andreanof Islands, Solomon Is, Northern France, Germany, Libya, Central Italy,
Node 6 (60 degrees)
Myanmar to Western Turkey, Ukraine, SW Australia, Kamchatka/Komandorsky Is, Crete, Greece, New Guinea,
Node 7 (52 degrees)
Myanmar to Eastern Turkey, Syria, Ethiopia, Kuril Is, Papua New Guinea, Guam,
Node 8 (45 degrees)
Myanmar to Caucasus, Central Indonesia, Hokkaido,
Preliminary expectations for far field triggering from Tonga (will be revised)
Antipodal (~180 degrees)
Tonga to Morocco,
Outer shadow zone edge (141-148 degrees)
Tonga to mid-Atlantic, Iran, Lebanon, Iceland, Azores, Turkey, Mid-Atlantic, Reykjanes Ridge,
Node 3 (120 degrees)
Tonga to Greenland, Quebec, Tajikistan, Maine, Pakistan, Afghanistan, South Africa
P- and S- shadow zone edge and node 7 (101-110 degrees)
Tonga to South Indian Ocean, Nepal, Mississippi, Ohio, Northern Peru, Colombia, South of Africa, South Sandwich Islands, Bay of Bengal, Northern Missouri, Colombia, Bouvet Island, South Carolina, Alberta, Beaufort Sea, South of Africa, Georgia, Illinois, Louisiana, British Columbia, Canada, Central Chile, Myanmar,
Node 4 (90 degrees)
Tonga to Eastern Mexico, Guatemala, Texas, South Indian Ridge, South Atlantic, South Sandwich Islands, Texas, Colorado, Idaho, Denali, Montana, British Columbia, Yukon Territory, Canada, Guatemala, Sichuan, China, Sumatra,
Node 5 (72 degrees)
Tonga to Coast of Northern California, Baja California, Rat Islands, Fox Islands, Andreanof Islands, Kuril Islands, South of Sumatra, Coast of Oregon, Honshu, Kyushu, Japan, Philippines,
Node 6 (60 degrees)
Tonga to Molucca, Minahasa, Java, East Pacific Rise, New Guinea,
Node 7 (52 degrees)
Tonga to East Pacific Rise, South of Australia, Western Australia, New Guinea, Mariana Is,
EARTHQUAKE LISTING
Listed are the NEIC locations for earthquakes of M>=2.5 during the past day in
reverse chronological order.
MO DA HR MN YEAR LAT LONG MAG GEOGRAPHIC LOCATION
N+S- E+W-
04 2 11 36 2025 -22.2 -179.5 4.8 THE FIJI ISLANDS
04 2 10 45 2025 20.9 96.1 4.7 MEIKTILA BURMA (MYANMAR)
04 2 10 22 2025 40.6 -118.9 2.2 BLACK ROCK CITY
04 2 07 38 2025 38.8 -122.8 2.0 THE GEYSERS CA
04 2 07 29 2025 18.8 -64.5 3.4 BAY U.S. VIRGIN ISLANDS
04 2 06 52 2025 18.3 -68.0 3.6 PUNTA CANA DOMINICAN REPUBLIC
04 2 05 43 2025 37.9 -122.2 2.8 W OF ORINDA CA
04 2 05 21 2025 29.0 -98.0 2.9 FALLS CITY TEXAS
04 2 04 35 2025 26.0 128.5 4.7 ESE OF KATSUREN-HAEBARU JAPAN
04 2 03 59 2025 19.1 -68.1 3.6 PUNTA CANA DOMINICAN REPUBLIC
04 2 03 44 2025 -12.2 167.1 4.5 NNW OF SOLA VANUATU
04 2 03 38 2025 29.0 -98.0 2.1 FALLS CITY TEXAS
04 2 02 55 2025 18.9 -65.2 3.4 AMALIE U.S. VIRGIN ISLANDS
04 2 01 11 2025 35.9 -117.7 2.1 LITTLE LAKE CA
04 2 00 59 2025 -20.4 -173.7 5.0 SE OF PANGAI TONGA
04 2 00 42 2025 40.4 -125.0 3.3 WNW OF PETROLIA CA
04 2 00 29 2025 -56.9 -142.2 6.3 PACIFIC-ANTARCTIC RIDGE"
04 2 00 22 2025 3.2 97.5 4.4 SE OF BLANGPIDIE INDONESIA
04 2 00 20 2025 -10.2 161.4 4.5 KIRAKIRA SOLOMON ISLANDS
04 2 00 19 2025 28.5 87.1 4.3 NNE OF LOBUCHE NEPAL
04 2 00 01 2025 41.2 -116.7 3.5 KM NE OF VALMY
04 1 23 59 2025 26.0 128.6 5.0 ESE OF KATSUREN-HAEBARU JAPAN
04 1 23 58 2025 37.7 -122.0 2.9 WNW OF DUBLIN CA
04 1 23 54 2025 27.4 142.7 4.6 BONIN ISLANDS JAPAN REGION"
04 1 23 23 2025 36.6 70.7 4.6 SSW OF JURM AFGHANISTAN
04 1 23 06 2025 41.2 -116.7 3.5 NEVADA
04 1 22 04 2025 43.5 146.4 4.1 SW OF SHIKOTAN RUSSIA
04 1 21 29 2025 32.4 70.0 4.1 GULISHAH KACH PAKISTAN
04 1 19 47 2025 20.9 -154.9 3.0 NNE OF LAUPÄHOEHOE HAWAII
04 1 19 44 2025 35.3 -117.8 2.6 WSW OF JOHANNESBURG CA
04 1 18 46 2025 -18.2 -177.8 4.6 FIJI REGION"
04 1 17 17 2025 34.9 -104.2 3.0 NEWKIRK NEW MEXICO
04 1 17 09 2025 18.9 -68.9 3.1 MICHES DOMINICAN REPUBLIC
04 1 17 05 2025 31.7 -104.3 2.5 WHITES CITY NEW MEXICO
04 1 16 58 2025 64.0 -22.3 4.6 SE OF VOGAR ICELAND
04 1 16 57 2025 63.7 -22.6 4.9 SSW OF GRINDAVÃK ICELAND
04 1 16 54 2025 64.0 -22.3 5.2 ESE OF VOGAR ICELAND
04 1 16 51 2025 36.5 -114.0 2.0 KM S OF SCENIC
04 1 15 44 2025 63.1 -150.4 3.7 SOUTHERN ALASKA
04 1 15 27 2025 20.1 96.1 4.8 PYI TAW BURMA (MYANMAR)
04 1 15 25 2025 -4.5 124.0 4.4 ENE OF KATOBU INDONESIA
04 1 15 24 2025 -35.7 179.4 4.5 HICKS BAY NEW ZEALAND
04 1 15 07 2025 36.1 -116.3 3.0 NNW OF SHOSHONE CA
04 1 13 59 2025 -25.3 178.3 5.0 THE FIJI ISLANDS
04 1 13 52 2025 36.0 30.4 4.2 S OF BEYKONAK TURKEY
04 1 13 24 2025 31.5 -115.6 2.2 SAN VICENTE MEXICO
04 1 13 09 2025 -22.2 -179.2 4.7 THE FIJI ISLANDS
04 1 13 03 2025 32.1 -117.5 2.4 ROSARITO B.C. MX
04 1 12 33 2025 36.1 139.8 4.4 SSW OF SAKAI JAPAN
04 1 12 08 2025 36.9 77.2 4.3 SSE OF DAMUSI CHINA
04 1 11 26 2025 22.7 122.6 4.3 HUALIEN CITY TAIWAN
04 1 11 01 2025 22.1 96.0 5.0 MANDALAY BURMA (MYANMAR)
04 1 10 15 2025 -7.6 128.6 5.7 LOSPALOS TIMOR LESTE
04 1 10 13 2025 31.7 -104.3 2.0 WHITES CITY NEW MEXICO
04 1 09 30 2025 18.2 -64.8 3.1 BAY U.S. VIRGIN ISLANDS
04 1 09 25 2025 13.6 120.9 4.9 SE OF TINGLOY PHILIPPINES
04 1 08 50 2025 31.7 -104.3 2.3 WHITES CITY NEW MEXICO
04 1 08 38 2025 19.0 -67.1 3.1 ISABELA PUERTO RICO
04 1 06 05 2025 -46.1 -14.2 5.1 SOUTHERN MID-ATLANTIC RIDGE"
04 1 05 41 2025 42.9 146.0 4.1 SSE OF NEMURO JAPAN
04 1 04 17 2025 34.8 32.7 3.1 WNW OF PáCHNA CYPRUS
04 1 04 09 2025 58.1 -156.3 3.3 ALASKA PENINSULA
04 1 04 08 2025 58.1 -156.4 3.9 ALASKA PENINSULA
04 1 04 04 2025 58.1 -156.4 5.1 ALASKA PENINSULA
04 1 04 01 2025 39.8 -123.6 2.5 NNW OF LAYTONVILLE CA
04 1 02 58 2025 31.7 -104.3 2.1 WHITES CITY NEW MEXICO
04 1 02 31 2025 -5.1 149.8 4.5 KIMBE PAPUA NEW GUINEA
04 1 02 16 2025 -8.3 117.8 5.0 ENE OF POTOTANO INDONESIA
04 1 02 04 2025 4.7 -76.1 4.6 SE OF ARGELIA COLOMBIA
04 1 00 09 2025 79.8 1.0 4.6 GREENLAND SEA"
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