STRONG EARTHQUAKE IN PAPUA NEW GUINEA

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 4, 2024

 

 

The strongest earthquake in the world today was an M 6.2 in Papua New Guinea. NEIC reported it was felt with damage with intensity VII in Angoram, East Sepik, PNG. This earthquake occurred near local solar noon with the new moon and was likely promoted by tidal stresses with that alignment. This summary had expected maximum tidal stress with this new moon in previous issues as:

 

"The New Moon  arrived at 01:55 UT on September 3, 2024. Longitudes which will be at local solar midnight at this time are near 30 West while those at local solar noon are near 150 East. These zones include the central Atlantic and Iceland and western Europe in the west and the Kuril Islands, Japan and portions of eastern Indonesia and the Vanuatu Islands in the east. These areas are the most likely to see tidal triggering in the next week. Such events often occur near local solar midnight and noon. A major earthquake is considered likely with this new moon in the 10 days." (September 1-4, 2024)

 

This is the strongest regional aftershock of an M 6.9 on March 23, 2024 about 150 km southwest of today's epicenter. An M 6.5 hit close to today's epicenter on November 27, 2023. At the time this summary noted:

 

 

"The strongest earthquake in the world today was an M 6.5 in Papua New Guinea. NEIC reported it was felt with intensity up to VII in Wewak, P.N.G. It was probably felt in the epicentral area. This is the strongest earthquake in Papua New Guinea since an M 7.0 about 200 km northwest of today's event on April 2, 2023. Earthquakes of M6.5 and larger have occurred in the past 20 years with M 6.5 on April 22, 2004, July 31, 2011, April 16, 2013 and November 7, 2017.

At the time of the event of M 7.0 on April 2, 2023 this summary noted:

 

 

"The last earthquake of M>=6 in this area of Papua was an M 6.0 on January 18, 2020. but no earthquake larger size than this have been recorded in this area since an M 6.7 on January 10, 2002. ...  This epicenter is at 103 degrees from the mainshocks in Turkey and was probably promoted by energy from those sources." (February 9, 2023)

 

...

 

The last earthquake of M>=7.0 within about 200 km of today's epicenter occurred as an M 7.2 on September 8, 2002 and an M 7.0 on July 17, 1998, the only such regional events in the past 35 years." (April 3, 2023, November 27, 2023)

 

Forecast 165858 had expected a strong earthquake at this time was likely in New Guinea around September 5. This epicenter is at 103 degrees from the M 6.7 earthquake south of Africa of July 10, 2024 and was probably promoted by energy from  this source.

 

O:  5SEP2024 01:03:17   3.5S  144.2E MW=6.2  EMSC   NEAR N COAST OF NEW GUINEA, PN

P:  5SEP2024 165858     3.0S  141.0E 4.0-5.4 AACAA  Papua New Guinea            

P:  7SEP2024 165858     7.0S  144.0E 4.0-5.4 ACAAA  Papua New Guinea           

 

The strongest earthquake in the U.S. or Canada today was an M 4.0 in the Andreanof Islands, Aleutians, Alaska. It was not reported felt in the epicentral area. The last earthquake of larger magnitude in the western Andreanof Islands within about 200 km of this epicenter occurred as an M 5.0 on February 29, 2024. At the time this summary noted:

 

 

"The strongest earthquake in the U.S. or Canada today was an M 5.0 in the western Andreanof Islands, Aleutians, Alaska. It was not reported felt in this remote area. It occurred near local solar midnight and may have been promoted by tidal stresses which maximize near this hour. The last earthquake in the Andreanof Islands with M>-5 was an M 6.1 on December 21, 2023. At the time this summary noted:

 

 

"The last earthquake in the Andreanof Islands of M>=6.7 was an M 7.0 on August 30, 2013. An earthquake of M 6.4 last occurred in the area on August 15, 2018 and September 4, 2013. At the time of the M 6.4 on August 15, 2018 this summary noted:

 

"The M 6.6 in the Andreanof Islands is the strongest in the U.S. since the M 6.9 in Hawaii of May 4, 2018 and the strongest in Alaska since the M 7.9 in the Gulf of Alaska of January 23, 2018. Earthquakes of M>=6.6 have hit the region of the western Andreanof Islands on three occasions since 1990 - an M 6.6 on May 2, 2008; an M 6.9 on March 20, 1999 and events of M 7.9 and 7.3 on June 10, 1996." (August 15, 2018, October 16, 2023, December 21, 2023, February 29, 2024)

 

Forecast 165752 and 166024 had expected today's event within about 100 km was likely in late August or early September, 2024.

 

O:  4SEP2024 21:41:46  51.4N  179.6W ML=4.0  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P:  9SEP2024 166024    52.1N  180.0W 3.5-4.9 BAAAA  Andreanoff Isls, Aleutians 

P: 30AUG2024 165752    50.5N  179.8W 3.5-4.9 BAAAA  Andreanoff Isls, Aleutians 

 

 

MODERATE QUAKE SHAKES CENTRAL PHILIPPINES

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 3, 2024

 

 

The strongest earthquake felt in the world today occurred with M 5.4 in Central Luzon, Philippines. NEIC reported this earthquake of M 5.3 in Luzon, Philippines was felt with intensity up to IV in the area(s) of Luzon, Philippines in Bicol at Daet and Basud and in Tagalog at Lucena, Palestina, Cainta, Taytay, Malanday, and in Manila and Mariveles, Luzon. EMSC reported strong shaking in the central Philippines in Hondagua Lopez, Cainta, Quezon City, Taguig City, Antipolo, Bacoor and Paranaque City among others. PHIVOLCS reported intensity V in Quezon at Jomalig and Polillo, IV in Quezon at Burdeos, Panukulan and Patnanungan and Camarines Norte at Parascale, Santa Elena and Vinzons and III in other areas of Quezon, Camarines Norte; City of Taguig and Pateros Quezon City. Lesser shaking was reported in Camarines Sur, City of Angels and the City of Caloocan and Pasig. An aftershock of M 5.0 was reported by NEIC to have been felt with intensity II-III in the Philippines at Manila and in Taytay, Rizal, Tagalog. It is likely that this activity was promoted by landfall in the region today of Tropical Storm Yagi as proposed in previous issues of this summary:

 

"TC YAGI (12W) formed today east of Leyte and Samar, Philippines with winds up to 55 kts. This system is currently located at 16N 122E with winds up to 55 kts and heading to the west. Landfall in the central Philippines could bring enhanced seismicity to that area of the Philippines.

 

and

 

TS YAGI (12W) continued today east of northern Luzon Philippines with winds up to 70 kts. This system is currently located at 19N 120E with winds up to 70 kts and heading to the west. Landfall in the central and northern Philippines could bring enhanced seismicity to that area of the Philippines. It is then likely to reach typhoon levels as it moves into eastern China." (September 2-3, 2024)

 

The last earthquake in Luzon within about 200 km of today's epicenter with M>=5.3

 was an M 5.2 on January 16, 2023 south of today's epicenter but the last event of larger magnitude was an M 5.5 on December 25, 2020. At that time this summary noted:

 

 

"The strongest earthquake in the world today was an M 5.4-5.5 in Luzon, Philippines. It appears to be a regional aftershock of the M 6.3 which hit Mindoro, Philippines yesterday. Today's event was reported felt with intensity V in Aurora, San Francisco, Quezon, Southern Tagalog and III in Boac and Baguio, Cordillera. The last earthquake of M>=5.5 within about 150 km of this epicenter was an M 5.7 on November 5, 2010 more than 10 years ago. An M 5.6 hit about 150 km southeast of this on March 5, 2012." (December 25, 2020)

 

Forecast 165883 had expected a moderate earthquake in this area was likely around September 4, 2024.

 

O: 03SEP2024 23:55:49  14.9N  122.6E mb=5.0  EMSC   LUZON, PHILIPPINES

O:  3SEP2024 23:16:47  14.9N  122.6E MW=5.3  EMSC   LUZON, PHILIPPINES           

P:  4SEP2024 165883    13.0N  124.0E 3.5-4.9 ABBAA  Luzon, Philippines         

 

An earthquake of M 4.9 was also widely felt in Cyprus today. NEIC reported maximum intensity V in Cyprus at Kissonerga with IV in Chlorakas, Lempa, Koloni, Konia, Kouklia and II-III in Malia, Lemesos, Kato Deftera among others.

EMSC reported strong shaking in Cyprus in Chlorakas, Kato Pafos, Paphos, among many other communities on Cyprus. This is the strongest earthquake in Cyprus since an M 5.3 on February 2, 2022 – an aftershock of an M 6.5 on January 11, 2022. At that time this summary noted:

 

 

"The strongest earthquake in the world today was an M 6.6 in the region of Cyprus south of Turkey. NEIC reported it was felt with intensity VI in Cyprus at Polis, Skouli, Argarka; V in Kossonerga; IV in Regeia, Giolou, Tala, Chiorakas, Lempa, Cyprus. Minor damage accompanied major concern with shaking that lasted for a long period according to press accounts. This is the strongest earthquake near Cyprus within about 250 km since an M 6.8 on October 9, 1996, the only other such event in the area in at least 30 years." (January 11, 2022)

 

Forecast 165969 had expected today's event was likely within about 50 km around September 4, 2024.

 

O:  3SEP2024 21:29:51  34.7N   32.2E MB=4.9  EMSC   CYPRUS REGION                

P:  4SEP2024 165969    35.0N   32.0E 3.5-5.2 AAAAA  Turkey                     

 

A moderate earthquake of M 5.0 occurred in northeastern Iceland today. It was not reported felt in this remote area and is not part of the current volcanic eruptions in Southern Iceland. A volcanic eruption and moderately strong earthquakes hit this region in late August, 2014 and was followed by moderate earthquakes through April 21, 2024. At that time this summary noted in  this regard:

 

 

"The earthquake of M 5.3 in northeastern Iceland is the largest in that area within about 150 km since a series of moderately large events occurred near this epicenter in August and September, 2014 - a volcanic series which included events of M 5.6 and 5.7 on August 26 and 27, 2014. At the time this summary noted:

 

 

"The earthquake of M 5.7 in Iceland is the strongest recorded in that area  since an M 5.8 on September 16, 2002, the only other event of this size in  Iceland in the past 25 years. It is part of the sub-glacial Bardarbunga volcanic eruption in the central portion of that island. ..." (April 21, 2024)

 

Forecast 166053 had expected today's event in Iceland was likely within about 50 km of this epicenter in early September, 2024.

 

O:  3SEP2024 16:31:15  64.6N   17.3W MW=5.0  EMSC   ICELAND                      

P:  6SEP2024 166053    65.0N   17.0W 3.0-4.7 BAAAA  Iceland area               

 

The strongest earthquake in the U.S. or Canada today was an M 4.2 in the Queen Charlotte Islands near Port Clements, British Columbia, Canada. It was not reported felt in this area. This is the strongest earthquake in the Queen Charlotte Islands since an M 4.4 a year ago on September 2, 2023. It was reported in this summary at the time as:

 

"The strongest earthquake in the U.S. or Canada today was an M 3.8 in the Queen Charlotte Islands region of Canada. It was not reported felt in this remote area. This may be a regional aftershock of the M 4.4 of August 15 in the Queen Charlotte Islands about 100 km southeast of today's epicenter. At the time this summary noted in this regard:

 

 

"An earthquake of M 4.4-4.7 also occurred today in the Queen Charlotte Islands region, Canada. It was reported to have been lightly felt in the epicentral area. The last earthquakes of equal or greater magnitude in the Queen Charlotte Islands Region were of M 5.1 on June 4, 2022 and July 26, 2022. Today's epicenters which began with an M 3.4 near local solar midnight are near the expected longitude of maximum tidal stress with the new moon of August 16 and were probably promoted by stresses associated with that tidal alignment" (August 15, 2023, September 2, 2023)

 

Forecast 166027 had expected today's event within about 150 km was likely around September 3, 2024.

 

O: 04SEP2024 03:17:16  53.5N  133.1W MB=4.2  ECAN WSW OF PORT CLEMENTS, BC 

O:  4SEP2024 03:17:16  53.5N  133.1W ML=4.2  EMSC   QUEEN CHARLOTTE ISLANDS REGION

P:  3SEP2024 166027    53.0N  131.0W 3.0-5.1 AABAA  British Colombia           

 

 

QUIET DAY IN GLOBAL SEISMICITY WITH NEW MOON

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 2, 2024

 

The most widely felt earthquake in the world today occurred as an aftershock

in Taiwan.  NEIC reported this earthquake of M 5.0-5.1 in near Taiwan was felt with intensity up to IV in the area(s) of near Taiwan in Taipei, Taoyuan and in Xiamen, China. It is the strongest aftershock in Taiwan of the April 2, 2024 (M 7.4) since an M 5.2 on May 31, 2024. It appears to be an aftershock of the M 7.4 that hit Taiwan on April 2, 2024. At the time this summary noted:

 

 

"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). JMA gave today's event M 7.7 and reported several minor tsunami waves. A tsunami warning was also made for Taiwan but the Pacific Tsunami Warning Center (PTWC) reported that no damaging tsunami waves had been reported nor were any now expected. NEIC reported it was felt with intensity up to IX (major damage) in the area southwest of Hualien City, Taiwan, EMSC reported it was also felt in mainland China as a double quake in Nanjing City nearly 1000 km from the epicenter, in Wuxi City with mild shaking; Shanghai City, Hong Kong, Hangzhou, Shaoxing, Zhonggeng, Xiamen, and Quanzhou.

PHIVOLCS reported it at M 7.5 was felt in the Philippines with intensity II in Itbayat, Batanes, and I in Basco, Mahatao, Ivana, Uyugan,  and Sabtang, Batanes.

This event may be related to the upcoming solar eclipse of April 8, 2024. It is interesting to note that the total eclipse path through North America is near 103 degrees from Taiwan throughout. The most likely area affected by strong energy from Taiwan in the U.S. is southern and Baja California which is near 103 degrees from today's epicenter and subject to far-field seismic triggering at this time. This distance also passes through areas of Utah and portions of Ontario, Nunuvat and Quebec, Canada. It is likely that the recent geomagnetic storm helped promote this earthquake in Taiwan. The storm occurred at the end of March, 2024 and was one of the largest in recent years as reported in this summary. It had been expected to affect most strongly areas near the geomagnetic equator and at high latitudes. Taiwan is located about 10 degrees north of the local geomagnetic equator. The timing is also suspicious as maximum ionospheric ring current intensities occur about 4-9 days after such storms near 10 degrees either side of the geomagnetic equator." (April 2, 2024)

 

 

Forecast 165915 had expected this event in early September within about 100 km  of today's epicenter.

 

O:  2SEP2024 08:26:25  23.9N  121.7E MW=5.1  EMSC   TAIWAN                       

P:  4SEP2024 165915    22.0N  122.0E 4.0-5.4 ABAAA  Taiwan                     

P:  6SEP2024 165915    24.0N  121.0E 4.0-5.5 BAAAA  Taiwan                     

 

The strongest earthquake in the U.S. or Canada today was an M 4.2 off the coast of Oregon. NEIC reported this earthquake of M 4.2 off the coast of Oregon was felt with intensity up to II in the area(s) of Oregon in Portland.  This area has been relatively quiet in recent months. The last earthquake of M>=4.2 occurred on May 4, 2024 with M 4.3. The last of significantly larger magnitude was an M 5.7 on March 27, 2024. At the time this summary noted:

 

 

"The strongest earthquake in the U.S. or Canada today was an M 5.7 off the coast of Oregon. NEIC reported it was felt with intensity up to III along the coast of Oregon, especially in the Port Orford area. EMSC reported light shaking in Springfield, Oregon. A foreshock of M 3.0 hit the area within minutes of local solar noon about 12 hours earlier and was felt in the Port Orford, Oregon area.  These earthquake occurred near local solar noon and  midnight and may have been promoted by tidal stresses with the full moon" (March 27, 2024) of

 

Forecast 166005 had expected today's event within about 50 km was likely  around September 2.

 

O:  2SEP2024 18:01:07  43.4N  127.1W MW=4.2  EMSC   OFF COAST OF OREGON          

P:  2SEP2024 166005    43.1N  126.5W 3.0-4.6 AAAAA  Off Coast of Oregon        

 

A series of light earthquakes - including two of M 3.0 occurred south of Los Angeles in the Channel Islands today. NEIC reported these earthquakes of M 3.1 and M 2.9 South of Los Angeles, California  were felt with intensity up to IV in the area(s) of Los Angeles, California in Palos Verdes, Long Beach, Cypress, Costa Mesa and Oxnard.  The area at this time appears to be somewhat unstable and stronger earthquakes in the area and in the Los Angeles area are expected in the next week.

 

Forecast 165958 had expected today's events were likely around September 2. These earthquakes are located at 103-105 degrees from recent strong quakes in Mindanao, Philippines and from Tajikistan and Taiwan and may have been promoted

by energy from those sources.

 

O: 02SEP2024 12:03:27  33.7N  118.6W ML=2.2  EMSC   CHANNEL ISLANDS REG., CALIFORNIA

O: 02SEP2024 14:38:51  33.7N  118.6W ML=3.0  EMSC   CHANNEL ISLANDS REG., CALIFORNIA

O:  2SEP2024 11:34:26  33.7N  118.6W ML=3.0  EMSC   CHANNEL ISLANDS REG., CALIFORN

P:  2SEP2024 165958    34.4N  118.6W 2.5-4.6 AAAAA  So. California             

 

STRONG EARTHQUAKE HITS NEW GUINEA/SOLOMON ISLANDS

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 1, 2024

 

 

The strongest earthquake in the world today was an M 6.4 in the northern Solomon Islands, Papua New Guinea. NEIC reported it was felt with damage in Panguna with intensity VIII. A tsunami was not expected nor observed. No tsunami warning was issued. A moderate foreshock hit the area several days ago and was addressed in this summary as:

 

 

"An unusual earthquake occurred today with M 4.5 in the Bougainville Region, PNG. While this region is typically quite active with events of M>=5.5 often occurring nearly monthly, the last such event occurred as an M 5.8 on March 8, 2023 and it may be overdue for another." (August 29, 2024)

 

Today's M 6.4 may have been promoted by strong tidal stresses associated with the upcoming new moon of September 3 as it occurred at the longitude of maximum stress with this alignment as noted in previous issues of this summary:

 

"The New Moon will arrive at 01:55 UT on September 3, 2024. Longitudes which will be at local solar midnight at this time are near 30 West while those at local solar noon are near 150 East. These zones include the central Atlantic and Iceland and western Europe in the west and the Kuril Islands, Japan and portions of eastern Indonesia and the Vanuatu Islands in the east. These areas are the most likely to see tidal triggering in the next week. Such events often occur near local solar midnight and noon. A major earthquake is considered likely with this new moon in the 10 days." (August 28-September 2, 2024)

 

This earthquake in New Guinea is located on the geomagnetic equator. It occurred at the maximum of an M-class solar flare and may have been promoted by energy (SFE) associated with that flare (#8490). SWPC data for this flare follows:

 

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

8490       1955   2000      2011   M1.1      (September 1, 2024)   9.2E-03  

New Guinea M 6.4 20:13 UT

 

A foreshock of M 5.3 to the west of the mainshock occurred earlier in the day  in Papua New Guinea. NEIC reported it was felt with intensity III in Kimbe West New Britain, PNG.

 

Today's earthquake in Papua New Guinea with M 6.4 is the strongest within  about 200 km of this epicenter since an M 7.9 on January 22, 2017 and is probably an long-term, regional aftershock of that event. This summary noted the event in 2017 at the time as:

 

 

"A great earthquake with preliminary magnitude M 8.0 occurred in the northern

Solomon Islands, Papua New Guinea early on January 22. NEIC reported it was felt with intensity VIII in Arawa, North Solomons; VII in Kokopo, East New Britain and II-IV in Namatanai, New Ireland, Papua New Guinea and II in Honiara, Guadalcanal, Solomon Islands. SWPC did not issue a tsunami warning despite the large magnitude due to the depth near 167 km. The immediate trigger for this event may have been a C1.8 flare (#5300) (the fourth largest in the past 1.5 months) which reached maximum intensity while this epicenter was within minutes of local solar midnight, a prime time for solar flare effects to trigger seismicity. Two other solar flares of higher class also occurred today (C6.1 and C9.3). The C9.3 flare which maximized at 0726 UT may have helped trigger an M 4.4 quake in El Salvador near the maximum output of the flare while the flare of C6.1 may have helped trigger several aftershocks in Central Italy including an M 3.5 within minutes of local solar noon and the occurrence of this flare. The flare of C9.3 is the strongest solar flare in nearly two months - since an M1.0 on November 29, 2016.

 

The M 8.0 is the strongest of the recent earthquakes to hit the southwestern Pacific area. These began with events of M 7.8-7.9 in New Zealand, Fiji, Solomon Islands, New Britain, and the Celebes of Indonesia. Much of the energy from these events is focused at 90 degrees in California and at 103 degrees in  the central U.S. and Mexico where further enhanced seismicity is expected after today's event. In the east, the most likely far-field seismicity promoted from New Britain has been occurring in Iran, Colorado, Madagascar, Nunavut, Canada, New Mexico, Central Mexico following the earlier M 7.8 foreshock." (January 22, 2017)

 

Forecast 165855 and 165863 had expected seismic enhancement within about 100  km of today's event was likely in early September.

 

O:  1SEP2024 20:13:35   6.8S  155.5E MW=6.4  EMSC   BOUGAINVILLE REGION, P.N.G.  

P:  7SEP2024 165855     7.0S  154.0E 4.0-5.8 CABAA  New Britain                 

P:  7SEP2024 165863     6.0S  155.0E 4.0-5.5 CAAAA  Solomon Islands            

 

The strongest earthquake in the U.S. or Canada today was an M 4.6 in the  Kenai Peninsula of Alaska. NEIC reported it was widely felt in the area with intensity up to VI and IV in Homer and II-III in Anchor Point, Ninilchik, Clam Gulch, Cooper Landing, Kenai, Moose Pass, Anchorage and Girdwood, Alaska. This is the strongest earthquake in the Kenai area of Alaska within about 150 km of today's epicenter in more than a year. The last of larger magnitude was an M 5.4 on March 19, 2023. At the time this summary noted:

 

 

"The strongest earthquake in the world today was an M 5.4 in Southern Alaska. NEIC reported it was felt with intensity V in Alaska at Anchor Point, Homer, Ninilchik, IV in Kenai National Wildlife Refuge and III in Clam Gulch, Kasilof, Soldotna, Sterling, Cooper Landing, Kenai, Anchorage, Girdwood, Iliamna, Fort Richardson, Eagle River, Willow, Wasilla, Chugiak, Palmer and Valdez. This is the largest earthquake within about 200 km of this epicenter in the  Kenai Peninsula of Alaska since an M 5.8 about 100 km southwest of today's epicenter on May 27, 2019. At the time this summary noted in this regard:

 

The strongest earthquake in the world today was an M 5.8 in the Kodiak Island region of Southern Alaska. NEIC reported intensity IV in Homer and Anchor point and II-III in Ninilchik, Pedro Bay, Kodiak Kenai NTL, Kasilof, Soldotna and Sterling, Alaska among others. This is the strongest earthquake in the Kodiak area within about 150 km of this epicenter since an M 7.1 to the north on January 24, 2016." (May 27, 2019, March 19, 2023)

 

Forecast 166047 had expected today's events within about 100 km was likely around September 3.

 

O:  1SEP2024 13:20:20  59.6N  151.5W MW=4.5  EMSC   KENAI PENINSULA, ALASKA      

O:  1SEP2024 13:20:21  59.7N  151.5W MW=4.6  ANSS   KENAI PENINSULA, ALASKA      

P:  3SEP2024 166047    60.5N  151.5W 3.2-5.3 AAAAA  Central Alaska             

 

An unusually large M 3.8-4.6 earthquake also occurred in Quebec, Canada today near the Vermont border with the U.S. NEIC reported it was felt with intensity up go IV in Quebec, Canada in Pierreville, Nicolet, Drummondville, Louiseville, Saint-Germain-d-Grantham, Maskinonge, Alencon, Sorel, among others in Quebec and in Vermont at Enosburg Falls (V), Burlington, Winooski, Chelsea, Ludlow, Bellows Falls, among others in that state and as far as Willsboro, New York, Ontario, and North Adams, Massachusetts. It may have been felt in Pennsylvania, New Jersey and Michigan as well. EMSC reported strong shaking in Quebec at Saint-Elphege, Yamaska, Berthierville, Trois-Rivieres, Saint-Leon-le-Grand, Mandeville, Saint-Hyacinthe among others. Earthquakes Canada reported this event at M 4.6 and that it was felt in the epicentral area. The last earthquake listed by NEIC within about 200 km of today's epicenter with M>=4.6 occurred more than 35 years ago. The last within  250 km was an M 5.0-5.2 on June 23, 2010 and on April 20, 2002 both to the west of today's epicenter. At the time of the June, 2010 event this summary noted:

 

 

"A moderate earthquake of M 5.0 shook much of eastern Canada and the northeastern United States today. The earthquake forced the evacuation of the Parliament building in Ottawa. Workers left for the day while the building was inspected. Buildings in Toronto were emptied. Toronto will be the meeting place of the G20 summit this weekend. This is believed to be the largest earthquake in the region since an M 6.1 in 1935. Damage was reported from Graceland, Quebec and surrounding communities. Trains were interrupted and a portion of route 307 east of Quebec has been closed after it had collapsed. Structural damage was also reported to buildings in Gatineau, Quebec and to  three Ottawa schools. Windows shattered in Ottawa's Rideau Centre shopping Mall and the First Avenue Public School was closed because of cracks. A portion of a bridge in Bowman, Quebec near the epicenter is missing over a 50-meter stretch and traffic on Route 307 was diverted. A church in Gracefield saw the ceiling and chimney collapse in the earthquake and power was cut in some areas. The largest earthquakes in the region occurred in 1935 and in 1732 (M 6.2) southeast of this event. That event caused significant damage in Montreal. Smaller events occur several times a year in the region. The mainshock was followed by at least 20 aftershocks according to Earthquakes Canada." (June 23, 2010)

 

Forecast 165996 had expected today's event within about 100 km was likely around September 1.

 

O:  1SEP2024 09:43:36  46.0N   72.8W ML=3.8  EMSC   ST. LAWRENCE VALLEY REG., CANA

O:  1SEP2024 09:43:37  46.0N   72.8W MB=4.6  ECAN OF PIERREVILLE, QC, FELT       

P:  1SEP2024 165996    45.0N   73.0W 2.0-4.4 AAAAA  New England                

P:  1SEP2024 165996    45.0N   73.0W 2.0-4.4 AAAAA  New England                

 

 

An unusually large earthquake of M 3.4 also occurred today in the Mammoth Lakes

in Central California near the Nevada border. The last earthquake of M>=3.5 in the Mammoth Lakes area within about 75 km of today's epicenter occurred as an M 3.6 on February 12, 2024 but the last earthquake of significantly larger magnitude in the area was an M 3.9 on December 2, 2022 and on March 31, 2022.

 

MODERATELY STRONG QUAKE IN SOUTH SANDWICH ISLANDS

 

EARTHQUAKE SUMMARY FOR AUGUST 31, 2024

 

The strongest earthquake in the world today was an M 5.6 in the South Sandwich

Islands. It was not reported felt in this remote area. This is the strongest

earthquake in the South Sandwich Islands since an M 5.7 on June 19, 2024. At that time this summary noted in this regard:

 

 

"While the South Sandwich Islands have been active in May and June, 2024 today's event of M 5.7 is the strongest in the region since a similar M 5.7 on February 14, 2024. The last such earthquake in the South Sandwich Islands of larger magnitude was an M 5.8 on November 30, 2023. At the time this summary noted:

 

 

"The strongest earthquake in the world today was an M 5.8 in the South Sandwich Islands. This event was not reported felt in this remote area. A major earthquake of M 7.5 hit about 200 km southeast of today's epicenter on August 12, 2021 but the last earthquake within this range of today's event with equal of larger magnitude was recorded on August 18 and December 7, 2021 with M 5.8-5.9. Today's event was probably promoted by geomagnetic effects which maximize near the geomagnetic equator and at high latitudes." (November 30, 2023, June 20, 2024)

 

This epicenter is near the antipode of the M 7.1 in Kamchatka that occurred on August 17, 2024 and was probably promoted by energy from that source. Readers may check 58S 25W for the South Sandwich Islands event and 53.0N 159E for Kamchatka for antipodality. It is also near 103 degrees from the Tonga quake of M 6.9 of August 25 and may have been promoted by energy from that source.

Two unusual earthquakes also occurred today at 144 degrees from the Tonga quake – an M 4.0 in Crimea and an M 5.0 in the Northern Mid-Atlantic Ridge which also were likely promoted by energy from Tonga.

 

Forecasts 166111 and 165829 had expected this event within about 100 km was likely at the end of August or early September, 2024.

 

O:  1SEP2024 00:53:16  58.0S   25.7W MB=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  5SEP2024 166111    58.0S   25.0W 4.0-6.2 BAAAA  So. Sandwich Islands       

P: 27AUG2024 165829    59.0S   26.0W 4.0-6.2 BAAAA  So. Sandwich Islands       

 

MODERATELY STRONG EARTHQUAKE IN NORTHERN ATLANTIC

 

EARTHQUAKE SUMMARY FOR AUGUST 30, 2024

 

The strongest earthquake in the world today was an M 5.6 in the Northern Mid-Atlantic Ridge. It was not reported felt in this remote area. The last earthquake with equal or larger magnitude within about 250 km of this North Atlantic epicenter was an M 5.9 on October 1, 2022. This followed several events of M 5.4-5.6 in the same region in late September, 2022. At the time this summary noted:

 

 

"The earthquake of M 5.9-6.0 in the Reykjanes Ridge today is the strongest to date in the current series which has included two events of M 5.7 in the past four days in the region. It occurred at a high latitude near local solar midnight and was also probably promoted by effects from the geomagnetic storm (see above). The aftershock series in northern Sumatra ceased immediately after the M 5.9 in the Reykjanes Ridge. An M 5.0 in the Reykjanes aftershock series

occurred within minutes of local solar midnight during the geomagnetic storm today. This sequence had been noted in previous issues of this summary as:

 

"This is the strongest activity within about 200 km of this epicenter in the Reykjanes area since an M 6.8 on February 16, 1998. That was the only earthquake in this region with M>=5.7 in at least 30 years." (October 1, 2022)

 

Forecasts 166034 and 165762 had expected today's event within about 50-100 km  was likely at the end of August or early September, 2024.

 

O: 30AUG2024 09:32:25  53.0N   33.4W MW=5.6  EMSC   REYKJANES RIDGE              

P:  1SEP2024 166034    53.0N   32.0W 4.0-5.4 AAAAA  North Mid-Atlantic Ridge   

P: 27AUG2024 165762    54.0N   35.0W 4.0-5.5 BAAAA  North Mid-Atlantic Ridge   

 

The strongest earthquake in the U.S. or Canada today was an M 3.5  and an M 4.0 in the Fox Islands, Aleutians. NEIC reported it was felt with intensity up to II in the Fox Islands at Nikolski. NEIC reported this earthquake of M 3.7 in the Fox Islands, Alaska was felt with intensity up to II in the area(s) of the Fox Islands, Alaska in Unalaska. The last earthquake of larger magnitude in the Fox Islands was an  4.4 on July 4, 2024. But the last event of significantly larger size in  the Fox Islands occurred as an M 6.0 on May 19, 2024. At the time this summary noted:

 

 

"The strongest earthquake in the world today was an M 6.0 in the Fox Islands. NEIC reported it was felt with intensity up to V in Nikolski, Alaska. This is the first earthquake in the U.S. or Canada of M>=6 in the year 2024 to date. The last such earthquake of M>=6 occurred on December 21, 2023 with M 6.1 and prior to that as a M 6.4 on October 16, 2023. Today's earthquake is also the strongest within about  200 km of today's epicenter since an M 6.8 and 6.6 on January 11, 2022." (May 19, 2024)

 

Forecasts 166030 and 165758 had expected this activity in the Fox Islands within about 50 km was likely around August 30-September 1.

 

O: 30AUG2024 18:21:57  52.7N  168.8W ML=4.0  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P:  1SEP2024 166030    52.4N  169.4W 3.5-5.4 AAAAA  Fox Islands, Aleutians     

 

O: 31AUG2024 00:41:54  53.5N  165.9W ML=3.5  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 30AUG2024 165758    53.7N  165.3W 3.5-5.0 AAAAA  Fox Islands, Aleutians     

 

 

STRONG AFTERSHOCK IN KAMCHATKA ASSOCIATED WITH SOLAR FLARE

 

EARTHQUAKE SUMMARY FOR AUGUST 29, 2024

 

The strongest earthquake in the world today was an M 6.0 aftershock in  Kamchatka. It was felt with moderate intensity in Petropavlovsk, Russia.

EMSC reported moderate shaking in Petropavlovsk and Yelizovo, Russia. An aftershock of M 4.3 was also reported felt with light intensity in Petropavlovsk. This may have been triggered by an M1.2 solar flare which began about the time Kamchatka was at local solar noon (0120 UT) and peaked about an hour later (0206 UT). SFE associated with this flare may have helped promote the size of this earthquake in Kamchatka. This is the strongest aftershock to date of the M 7.1 in Kamchatka of August 17, 2024. Following is the SWPC for flare 7830, associated with the M 6.0 in Kamchatka:

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

7830       0200   0206      0214   M1.2      (August 30, 2024)   7.7E-03 

 

Today's M 6.0 in Kamchatka follows events of M 7.1 on August 17, 2024 and prior to that  an M 6.5 on April 3, 2023 and an M 6.2 on March 28, 2019. At the time of the 2023 quake this summary noted:

 

 

"A strong earthquake of M 6.5-6.9 shook areas of Kamchatka, Russia today. RSS reported at least 100 people reported feeling this earthquake with moderate shaking. NEIC reported it was felt with maximum intensity V in Kamchatka at Mohovaja and IV in Petropavlovsk. This event is located near Barkhatnaya Sopka Volcano (about 15 km away) and may provoke volcanism at that Volcano. The last earthquakes in the region of Kamchatka of M>=6.5 occurred on January 30, 2016 (M 7.2) and August 24, 2006 (M 6.5)." (April 3, 2023)

 

Forecast 165757 had expected enhanced seismicity in Kamchatka was likely around

August 28.

 

O: 30AUG2024 04:31:48  52.8N  160.3E mb=4.3  EMSC   OFF EAST COAST OF KAMCHATKA

O: 30AUG2024 04:24:23  53.0N  160.2E MW=6.0  EMSC   OFF EAST COAST OF KAMCHATKA  

P: 28AUG2024 165757    52.0N  161.0E 4.0-5.4 AAAAA  E. of Kamchatka            

 

 

 

STRONG EARTHQUAKE SHAKES EL SALVADOR AND GUATEMALA

 

EARTHQUAKE SUMMARY FOR AUGUST 28, 2024

 

 

The strongest earthquake in the world today was an M 6.1 off the coast of El Salvador. NEIC reported it was felt with intensity up to IV in El Salvador in La Libertad, Zaragoza, Nuevo Cuscatlan, Nueva San Salvador, Antiguo Cuscatlan, Guaymango, Ayutuxtepeque, Quezaltepeque, Apopa and Guazapa and in portions of Guatemala. EMSC reported strong shaking in El Salvador at San Salvador, Nueva San Salvador, Apopa, and in Guatemala at Colonia Valles De Vista Hermosa, Colonia Valle Dorado, La Floresta, Guatemala City, No major damage or tsunamis were associated with this earthquake. Several aftershock and foreshocks were not reported felt except for an M 4.2 felt lightly in San Salvador, Santa Ana, El Salvador and in Guatemala City, Guatemala. This event was probably promoted by tidal effects as it lies near the longitude of maximum tidal stress with the previous full moon as noted in previous issues of this summary:

 

"The full moon arrived at 18:26 UT on August 19, 2024.   Longitudes which were at local solar midnight at this time are near 85 East while those at local solar noon are near 95 West. These include areas of central North America and the East Pacific in the west and central Asia including China, India, Nepal in the East. These areas are most likely to see moderate tidal triggering at this time. Tidal enhancement of regional seismicity is possible in many areas, however, a major earthquake associated with this new moon is considered possible in the next week by this report." (August 20-25, 2024)

 

Today's event occurred at the height of a strong geomagnetic storm - the strongest in the past month and may have been promoted by geomagnetic effects. This is the strongest earthquake near El Salvador since an M 6.5 on July 19, 2023. At the time this summary noted:

 

 

"The strongest earthquake in the world today was an M 6.5-6.6 in El Salvador, Central America. NEIC reported it was felt with maximum intensity VIII in El Salvador at Chirilagua, San Miguel; VII in Concepcion, Batres Usulutan, VI in Intipuca La Union; V in Usulutan, IV in San Aleo, San Miguel, Santiago de Maria, San Luis la Herradura La Paz and lesser shaking in El Vijo and Ciudad Barrios, San Miguel. This event was preceded by several light foreshocks.  Enhanced activity in this region had been expected at this time as it lies near the longitude of maximum tidal stress with this new moon as discussed previously in this summary ...

 

The new moon was expected to promote seismicity in Central America near 90 Wes

longitude (see tidal forecast above). Two groups of earthquakes today indicated by their timing to have been triggered by tidal stresses with this alignment. They occurred near local solar midnight in an area where strong tidal stresses were expected with this new moon in the area off the coast of El Salvador (M 3.9, 3.9)..." (July 19, 2023)

 

Forecasts 165872 and 165614 had expected today's activity in El Salvador was likely in late August or early September within about 50 km of today's epicenter.

 

O: 28AUG2024 20:11:47  12.9N   89.7W ML=4.2  EMSC   OFFSHORE EL SALVADOR

O: 28AUG2024 22:11:47  12.9N   89.7W ML=4.2  EMSC   OFFSHORE EL SALVADOR

O: 28AUG2024 22:14:41  12.9N   89.6W mb=4.3  EMSC   OFFSHORE EL SALVADOR

O: 28AUG2024 22:54:07  12.9N   89.6W ML=4.3  EMSC   OFFSHORE EL SALVADOR

O: 28AUG2024 22:58:01  12.9N   89.7W ML=4.2  EMSC   OFFSHORE EL SALVADOR

O: 28AUG2024 21:57:56  13.0N   89.6W MW=6.1  EMSC   OFFSHORE EL SALVADOR         

P:  3SEP2024 165872    13.0N   89.0W 3.5-5.5 BAAAA  Coast of Central America   

P: 29AUG2024 165614    13.0N   90.0W 3.5-5.5 AAAAA  Guatemala                  

 

An earthquake of M 5.1 was also widely felt in the area of Hania, Crete, Greece today. NEIC reported intensity up to IV in Crete at Galatas, Ayia Marina, Khania, Kolimvari, Kissamos, Palaiokhora, Souda, Vrises, Yerani and in Iraklion, Greece. NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity up to II-III in the area(s) of Hawaii at Paauilo, Kamuela and Honokaa.  EMSC reported strong shaking in Crete, Greece at Gavdos, Kastri, Patsianos, Chora Sfakion, Ano Myxorrouma, Akoumia, Agia Galini and as far as Sparta, Greece more than 300 km from the epicenter. No major damage or tsunami was reported with this earthquake although the press reported local residents were startled and ran from their homes.

 

This is the strongest earthquake in Crete since an M 5.2 on May 18, 2023.  A strong M 6.5 occurred in Crete on October 12, 2021 - an aftershock of an M 6.0 on September 27, 2021. At the time this summary noted:

 

 

"The strongest earthquake in the world today was an M 6.0 in Crete, Greece. NEIC reported it was felt with minor damage in Iraklion, Greece with VIII in Episkopi, Khanion tou Kokkini, Arkalokhorion, VI in Gournai, Skalanion, Kato Gouval, V in Thrapsonon, IV in Epano Arkhanai and Nea Alkarnassoa and II in Anissaras. Reuters reported today's event killed at least one person when the dome of a church at Arkalochori collapsed and damaged many buildings near the epicenter. In addition several people were injured and some were trapped in debris from damaged buildings. Evacuations took place through much of the island. Aftershocks could damage older buildings further. The last earthquake in Crete with M>=6 was an M 6.6 about 150 km southeast of today's epicenter on May 2, 2020. At the time of this event this summary noted:

 

"Today's earthquake in Crete is the strongest within about 200 km of that epicenter in at least 30 years. The area has been active in recent months with an M 5.8 to the east on January 30, 2020 and an M 6.0 on November 27, 2019. These events were more than 200 km from today's epicenter." (May 3, 2020, September 27, 2021)

 

Forecast 165665 had expected today's activity in Crete within about 100 km

was likely at the end of August.

 

O: 28AUG2024 16:29:54  34.8N   24.2E MW=5.1  EMSC   CRETE, GREECE                

P: 21AUG2024 165665    34.0N   25.0E 3.0-4.7 CAAAA  Crete                      

P: 28AUG2024 165665    34.0N   26.0E 3.0-4.6 AABAA  Crete                      

 

An unusual earthquake occurred today with M 4.5 in the Bougainville Region, PNG.

While this region is typically quite active with events of M>=5.5 often occurring nearly monthly, the last such event occurred as an M 5.8 on March 8, 2023 and it may be overdue for another. Forecast 165591 had expected today's event within about 100 km was likely around August 27.

 

O: 28AUG2024 07:25:58   4.9S  155.1E MB=4.5  EMSC   BOUGAINVILLE REGION, P.N.G.  

P: 27AUG2024 165591     5.0S  154.0E 4.0-5.5 AAAAA  New Britain                

 

MODERATE EARTHQUAKES IN UNIMAK, ALASKA AREA; MAYOTTE

 

EARTHQUAKE SUMMARY FOR AUGUST 27, 2024

 

It was a quiet day in global seismicity. The strongest earthquake in the world today was an unfelt earthquake of M 5.1 in the Kermadec Islands of New Zealand.

An unusual M 4.6 was widely felt in the area of Mayotte, an island east of central Africa. While Mayotte has seen several active periods in recent years, today's event is the strongest in the region since an M 4.5 on March 3, 2021 and prior to that an M 4.8 on November 10, 2020. The area became active in May, 2018 after an M 5.8 on May 15, 2018. At that time this summary noted:

 

 

"A moderately strong earthquake hit the region of Mayotte north of Madagascar today with M 5.8. NEIC reported it was felt with maximum intensity VI in Maoytte at Ouangani and V in Mtsamboro, Mamoudzou and Pamanzi. It was felt with

lesser intensity of II-III in Mayotte at Dzaoudzi, Pamanzi, Dembeni, Aftershocks of M 4.0-5.0 were reported felt lightly in Dzaoudzi, Pamanzi, Mayotte. Other areas feeling today's M 5.8 include the Comoroa at Nioumachoua and Madagascar to Marovoay. Felt reports came to NEIC from as far as 400 km from the epicenter. This follows a series of foreshocks which have occurred over the past four days.

The event of M 5.8 today in the Mayotte Region is the strongest within about 300 km of this epicenter in at least 28 years. No other earthquakes of M>=5.8 have ever been reported in this area. The last earthquake, and largest to date in the region had been an M 6.6 on July 15, 1960. Two events of M 5.2 hit the area on December 1, 1993 and May 21, 2000. Forecast 116878 had expected this event was likely within about 150 km of this epicenter around May 15." (May 16, 2018)

 

NEIC reported today’s earthquake of M 4.6 in Mayotte was felt with intensity up to V in the area(s) of Mayotte in Dzaoudzi and III in Tsingoni and II in Paje Comoros. EMSC reported moderate shaking in Mayotte at Pamadzi, Dzaoudzi, Mamoudzou, Dembeni, Boueni, Koungou.

 

O: 27AUG2024 15:51:07  13.1S   45.6E MB=4.6  EMSC   MAYOTTE REGION               

 

O: 27AUG2024 22:43:02  34.4S  179.9W MW=5.1  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 30AUG2024 165821    33.0S  179.0W 4.0-5.4 BBAAA  So. Kermadec Islands       

 

The strongest earthquake in the U.S. or Canada today was an M 4.8 in the region of False Pass, Alaska. NEIC reported it was felt with intensity up to III in King Cove, Alaska. An M 5.1 hit the region yesterday and was reported in this summary as:

 

"The strongest earthquake in the U.S. or Canada today was an M 5.1 in the Unimak

Island area of Alaska. NEIC reported it was felt with intensity up to III in Sand Point, Alaska. This may have been triggered by antipodal focusing of earthquake energy. It follows a pair of events of M 5.5 each at the antipode of this which occurred on August 23 and were noted in this summary at the time as:

 

 

"The strongest earthquakes in the world today were a pair of events of M 5.5 each in the Indian Ocean south of Africa. They were not felt in this remote area. This epicenter is at the antipode of the Unimak and Alaska Peninsula and could enhance seismicity in that area in the next several days." (August 23, 28, 2034)

 

Today's earthquake of M 4.5 occurred within minutes of local solar noon and was probably promoted by strong tidal stresses which maximize near this hour.

 

Forecast 165770 had expected today's event within about 50 km was likely

around August 27.

 

O: 27AUG2024 22:12:01  54.4N  162.8W MW=4.5  EMSC   ALASKA PENINSULA             

P: 27AUG2024 165770    54.5N  163.5W 3.5-4.9 AAAAA  Unimak Islands, Aleutians  

 

O: 27AUG2024 15:01:00  54.5N  159.8W ML=3.9  EMSC   SOUTH OF ALASKA              

P: 22AUG2024 165770    54.5N  161.8W 3.5-4.9 BABAA  Unimak Islands, Aleutians  

P: 27AUG2024 165770    54.5N  163.5W 3.5-4.9 AABAA  Unimak Islands, Aleutians  

 

STRONG QUAKES SHAKE INDONESIA

 

EARTHQUAKE SUMMARY FOR AUGUST 26, 2024

 

Moderate earthquakes shook two areas of Indonesia today. These were an M 5.5 south of Java and an M 5.8 in the Banda Sea north of Australia. The strongest earthquake in the world today was the M 5.8 in Banda, Indonesia. NEIC reported it was felt with intensity up to III in Northern Territory, Australia at Coonawarra and Darwin. EMSC also reported light shaking in  Darwin, Australia. Strong earthquakes in Banda Sea are often felt in northwestern Australia. Today's event is the strongest within about 200 km of this epicenter since an M 7.1 and aftershocks on November 8-10, 2023. At the time this summary noted:  

 

"The strongest earthquakes in the world today were a pair of strong to major earthquakes of M 6.7 and 7.1 in the Banda Sea, Indonesia. NEIC reported it was felt with maximum intensity III in the Banda Sea, Indonesia area. The mainshock of M 7.1 was preceded about a minute early by a foreshock of M 6.7 which was felt in the area with maximum intensity VI. These events were also felt in northern Australia at Darwin. BMG reported the mainshock of M 7.1 was felt with intensity up to V in the Tanimbar Islands. BMG reported this activity in the Tanimbar region was felt with intensity IV in Bandaneira, III in Maluku Tengah, Banda, Maluku Tenggara, at Kecil, Manyeuw, Hoat Sorbay, in Tanimbar at Tanimbar Selatan, Selaru, Wer Tamrian, Wer Maktian; in Seram Bagian in Maluku Barat Daya and in Kota Tual and many other communities experienced lesser shaking. No tsunamis were observed or expected with these events." (November 8, 2023)

 

Forecast 165583 had expected today's event was likely within about 50 km around

August 23.

 

O: 27AUG2024 02:15:18   7.2S  129.5E MW=5.8  EMSC   KEPULAUAN BABAR, INDONESIA   

P: 23AUG2024 165583     7.0S  129.0E 4.0-5.4 BAAAA  Banda Sea                  

 

An earthquake of M 5.5 was also felt in Indonesia today south of Java. NEIC reported it was felt with intensity up to VI in Java with IV in Depok Yogyakarta and II-III in Prambanan, Klaten, Muntilan, Kebumen, Wengon, Cikeruh, Karawang and Pamulang. EMSC reported strong to moderate shaking in Java, Indonesia at Wonosari, Pengasih, Kasihan, Depok, Ngaglik, Kalasan, Jogja, Mlati, Ngemplak, Purworejo, Bayat, Turi, Baki, Jambu, Semarang and Pondok Aren. This earthquake may have been triggered by Solar Flare Effects (SFE) as it occurred at the maximum of flare 7260 according to SWPC flare data below:

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

7260       1252   1258      1307   C5.5      (August 26, 2024)   4.5E-03  

Java M 5.5 12:57 UT

 

Today's earthquake in Java of M 5.5 is the strongest within about 200 km

of this epicenter since an M 5.8 more than a year ago on June 20, 2023. At the time this summary noted:

 

"A strong earthquake of M 5.8-6.4 shook the region of Java, Indonesia today.

BMG reported this earthquake of M 6.4 in Java, Indonesia was felt with intensity II-III in the area(s) of Java, Indonesia with VI in Pracimantoro, Wonogiri, Java, Pacitan; V in Wonogiri, Gunungkidul, Kebumen, Purworejo, Mageland, Kulon Progo, Bantul, Gunungkidul, Sleman, Yogyakarta, Pacitan, Ponorogo, Pasuruan, Mojokerto, Bojonegoro, Lombok. NEIC reported an aftershock of M 4.9  in  Bali, Indonesia was felt with intensity II-III in the area(s) of  Bali, Indonesia in Kuta. News sources reported the quake injured at least 10 people while one person died of a heart attack during the quake. The associated shaking caused minor damage to hundreds of residences, offices and health and school facilities mainly in Yogyakarta and Central Java. No tsunami was expected or observed with This earthquake may have been triggered by SFE from flare #6340 which was ending simultaneously with this earthquake (see flare list below).

 

This is the strongest earthquake within about 200 km of this epicenter in  Java since an M 6.1 on January 25, 2014. The last event of M>=6.4 in this area occurred more than 35 years ago." (June 30, 2023)

 

Forecast 165600 had expected today's event south of Java was likely within

about 50 km around August 26.

 

O: 26AUG2024 12:57:40   8.7S  110.2E MW=5.5  EMSC   JAVA, INDONESIA              

P: 26AUG2024 165600     9.0S  110.0E 4.0-5.4 AAAAA  So. of Java                

 

The strongest earthquake in the U.S. or Canada today was an M 5.1 in the Unimak Island area of Alaska. NEIC reported it was felt with intensity up to III in Sand Point, Alaska. This may have been triggered by antipodal focusing of earthquake energy. It follows a pair of events of M 5.5 each at the antipode of this which occurred on August 23 and were noted in this summary at the time as:

 

 

"The strongest earthquakes in the world today were a pair of events of M 5.5 each in the Indian Ocean south of Africa. They were not felt in this remote area. This epicenter is at the antipode of the Unimak and Alaska Peninsula and could enhance seismicity in that area in the next several days." (August 23, 2034)

 

Today's earthquake of M 5.1 in this region south of Alaska is the strongest within about 150 km of this epicenter since an M 5.6 on August 1, 2024 and an M 5.4 on  September 21, 2023. At the time this summary noted:

 

 

"The strongest earthquake in the U.S. or Canada today was an M 5.4 in the Alaska Peninsula Alaska. NEIC reported it was felt with intensity V in Sand Point and King Cove and III in False Pass, Alaska. This is the strongest earthquake in the region of the Alaska Peninsula since an M 5.6 on August 3, 2023. At the time this summary noted:

 

 

"The strongest earthquake in the world, the U.S. or Canada today was an M 5.6 in the Unimak Island area of Alaska. NEIC reported it was felt with intensity IV in Sand Point, King Cove and II-III in False Pass, Chignik Lagoon, Alaska. This is the strongest aftershock to date of the M 7.2-7.4 of July 16, 2023 in the Alaska Peninsula about 50 km east of today's epicenter. It is the second largest earthquake in this area since an M 6.1 on July 28 and July 29, 2020. In the past 15 years many of the strongest earthquakes in this region have occurred in mid- to late-July and early August, perhaps indicating a seasonal triggering component. All events in the region with M>=6 since 2008 have occurred in late July including an M 6.1 on July 16, 2011; an M 6.0 on July 19, 2018; an M 6.1 on July 28, 2020 and an M 7.2 on July 16, 2023." (August 3, 2023)

 

This event occurred near local solar noon and may have been promoted by strong tidal stresses which maximize near this hour." (September 21, 2023)

 

Forecast 165770 had expected today's event in this region was likely around

August 22.

 

 

O: 26AUG2024 15:49:40  54.6N  159.7W MW=5.1  EMSC   SOUTH OF ALASKA              

P: 22AUG2024 165770    54.5N  161.8W 3.5-4.9 BABAA  Unimak Islands, Aleutians  

 

 

 

 

PORTUGAL QUAKE; MAJOR EARTHQUAKE IN TONGA STRIKES AT LOCAL SOLAR NOON

 

EARTHQUAKE SUMMARY FOR AUGUST 25, 2024

 

 

A moderately strong earthquake of M 5.4 was widely felt in Portugal today. It occurred near the antipode of an earlier M 6.9 in Tonga and may have been related to antipodal focusing of seismic energy at the antipode of that epicenter. NEIC reported the earthquake in Portugal was felt with maximum intensity VII in Lisbon, Portugal at Benedita Lisboa e Vale do Tejo and VI in Portugal at Ponte Norte, Sines Alenteho with V in Trafaria Lisboa e Vale do Tejo, Santa Barbara de Nexe, Monte Redondo, Moita, Loures, Castro, Carregado, Bucelas, Bombarral, Arrentela, Alferrarede, Lisbon, and with lesser shaking throughout Portugal and portions of Spain. EMSC reported a possible minor tsunami with maximum shaking in Portugal near the towns of Sines, Zambujal de Cima, with a great deal of noise. Euro Weekly News reported no major damage or injuries with this earthquake. The last earthquake located near Portugal with M>=5.4 occurred more than 35 years ago. The only comparable event in the past 35 years occurred with M 5.4-5.5 on December 17, 2009 and January 10, 2006. At the time this summary noted:

 

 

"A moderately strong earthquake of M 5.7-6.3 hit west of Gibraltar today and was felt widely in Portugal, Spain and Morocco. Spain's Seismological Institute gave the M 6.3 while NEIC gave M 5.7. The most likely magnitude given the widely felt region is M 6.3. Reports from NEIC often underestimate the magnitude of larger events initially and give larger values at a later time.  NEIC reported maximum intensity VI in Odemira, Alentjo, Portugal and V in Portugal at Boliqueime, A dos Cunhadoa, Aljezur, Azambuja, Baixa de Banheira, Castanheira do Ribatejo, Grandola, Lagoa, Luz, Malveira, Mealhada, Monchique, Montenegro, Pampilhosa, Portimao, Porto de Mos, Soure, Queijas, Rio Maior, Serpa, Serta, in Spain at Caceres, and in Morocco at Khouribga and Settat. Intensity IV was generally felt within about 300 km of the epicenter; III within about 500 km and II within 500-700 km from the epicenter. Spanish media reported the quake was also felt in Seville, Cordoba and Huelva, Spain. The epicenter is located near the presumed epicenter of the great Lisbon earthquake of November 1, 1755 which destroyed along with a tsunami much of the built coast of Portugal." (December 17, 2009)

 

Forecast 165401 had expected a moderate earthquake in this region within about 200 km of this epicenter was likely in mid-August. This earthquake is located at 103 degrees from the M 7.4 in Taiwan of April 2, 2024 and at 102 degrees from the M 7.1 in Kyushu, Japan of August 8, 2024 may have been  promoted by energy from those sources.

 

O: 26AUG2024 04:11:39  38.1N    9.4W MB=5.4  EMSC   PORTUGAL                      

P: 13AUG2024 165401    37.0N   11.0W 3.5-4.9 DBBAA  Morocco/Spain              

 

The strongest earthquake in the world today was an M 6.9 followed by an M 6.2 aftershock in Tonga. These events occurred within minutes of local solar noon and were likely triggered by tidal and/or geomagnetic stresses which maximize  near this hour. NEIC reported this earthquake was felt with maximum intensity V in Tonga at Pangai with IV in Tamakautoga, Niue, Nuku'alofa, Haveloloto, and III in Avatele, Alofi and Neiafu Vava'u Tong with slight shaking II in American Samoa. No tsunami was expected by EMSC which reported the quake was felt in Tonga at Nuku'aofa. A regional foreshock of M 4.4 was felt with intensity III in Neiafu Vava'u, Tonga half a day earlier. The last earthquake within about 250 km of today's epicenter in Tonga with M>=6.9 occurred as an M 6.9 on July 2, 2023 and prior to that on November 11 and 12, 2022 with M 7.0 and M 7.3. the time this summary noted:

 

 

NEIC reported today's event followed a series of lesser earthquakes in the region. This series of earthquakes in the Tonga and Fiji Region occurred over the past two days and was addresses in this summary in the previous issue as:

 

"The strongest earthquake in the world today was an M 5.0 in Tonga/Fiji. This event was accompanied by a series of similar-sized earthquakes in the area, many of which occurred at the beginning of C- or M-class solar flares. This summary watches for concentrations of this type in the "FLARE" section of this summary because it may be that instability in a zone such as this may suggest a stronger regional earthquake is likely in the near future. At this writing it has been nearly a year since a significant earthquake in this area." (August 25, 2024)

 

This suggests that patterns of this type may be useful in forecasting upcoming strong or major regional earthquakes. Tonga and Fiji have been active in the past several months including an M 7.2 on June 15, 2023 and an M 7.6 on May 10, 2023. Today's earthquake follows a regional enhancement in Fiji and Tonga which was addressed at the time as:

 

"A series of earthquakes also continued in the area of the Tonga Islands. The strongest of these was an M 5.6 in the northern Tonga Islands. This earthquake occurred at the peak output of flare 6630 - an M1.1 class solar flare and the strongest flare of the day. The earthquake occurred within minutes of local solar noon when immediate flare effects (SFE) are most likely to trigger earthquakes. It is likely it was triggered by SFE. This could indicate that a stronger earthquake in this area is likely at this time especially since the area is at the maximum longitude for tidal effects from the full moon of July 3 (2023)" (July 3, 2023)

 

Forecast 165809 had expected today's event was likely within about 100 km around August 25, 2024. These epicenters are located at the seventh node (72 degrees) from the M 7.1 in Kyushu, Japan of August 8 and may have been promoted by energy from that source. Like the event in Panama today, this epicenter is at 104-106 degrees from the M 6.7 south of Africa of July 10, 2024 and may have been promoted by energy from that source as well.

 

O: 25AUG2024 23:30:52  19.8S  175.0W mb=6.1  EMSC   TONGA

O: 25AUG2024 23:38:00  19.9S  175.2W mb=5.3  EMSC   TONGA

O: 25AUG2024 23:29:08  19.8S  175.1W MW=6.9  EMSC   TONGA                        

P: 25AUG2024 165809    21.0S  175.0W 4.0-5.7 ABAAA  Tonga Islands              

 

A moderately strong earthquake of M 5.8 also occurred south of Panama today. NEIC reported it was felt with damage and intensity VIII in Panama at Cerro Sombrero Ngobe Bugle, and lesser shaking in Chiriqui (IV) at Boquete and Volcan and in San Miguelito, Panama. EMSC reported moderate shaking in Panama at Puerto Armuelles, David, Cahuita. This event occurred within minutes of local solar midnight and may have been promoted by strong tidal stresses which maximize near this hour.

 

This is the strongest earthquake near Panama within about 250 km since an

M 6.3 on April 4, 2023. At the time this summary noted:

 

"The strongest earthquake in the world today was an M 6.7 south of Panama. NEIC reported maximum intensity VIII in Cerro Sombrero, Panama with IV in Remedios; V in Guarumal; IV in Pedregal, David, Berba, Chiriqui and less shaking in Horconcitos, Quitno, Los Algarrobas, Panama among others. This is the strongest earthquake in the area south of Panama within about 250 km of this epicenter since an M 6.9 about 250 km northwest of today's epicenter on August 20, 1999 more than 23 years ago. An M 6.6-6.7 hit near this epicenter on July 21, 2021. An earthquake of M 6.7 also occurred about 300 km southwest of today's epicenter on October 16." (April 4, 2023)

 

Forecast 165574 had expected today's event within about 50 km was likely around

August 28, 2024. This earthquake is located at 101 degrees from the M 7.1 in Kamchatka of August 17, 2024 and may have been promoted by energy from that source. Like the event in Tonga today, this epicenter is at 104-106 degrees from the M 6.7 south of Africa of July 10, 2024 and may have been promoted by energy from that source as well.

 

O: 26AUG2024 05:08:44   7.4N   82.3W MW=5.8  EMSC   SOUTH OF PANAMA              

P: 29AUG2024 165574     7.0N   82.0W 3.5-5.3 BAAAA  Costa Rica                 

 

An unusually large M 4.8 was also felt in Puerto Rico today. This event occurred near local solar midnight and may have been promoted by strong tidal stresses which maximize near this hour. NEIC reported this event was felt with maximum intensity VI in the Dominican Republic at Boca de Yuma with lesser shaking in Santo Domingo, La Roma, Otra Banda and in Puerto Rico with IV in Cabo Rojo, San Sebastian, Barranquitas, with lesser shaking in Mayaguez, Moca, Bayamon, Caguas among others. EMSC reported strong shaking in Bayamon and Mayaguez, Puerto Rico. The last earthquake in Puerto Rico within about 200 km of today's epicenter with M>=4.8 occurred as an M 5.6 on May 15, 2024. At the time this summary noted:

 

"Today's earthquake in Puerto Rico is the largest in that region since an M 6.4 on January 7, 2020 about 200 km southeast of today's epicenter. The last of larger magnitude in northern Puerto within about 200 km of today's epicenter was an M 6.0 on September 24, 2019. An earthquake of M 5.0, the only such event of M>=5 in the past 3 years in Puerto Rico occurred on November 17, 2022." (May 15, 2024)

 

It is not unusual for seismic enhancement to occur in the northern Caribbean during hurricane season, but no tropical cyclones are in the area at this time.

 

Forecast 165628 had expected today's event within about 100 km was likely

around August 27, 2024.

 

O: 26AUG2024 05:16:09  17.9N   68.1W MB=4.6  EMSC   DOMINICAN REPUBLIC REGION    

P: 27AUG2024 165628    18.0N   67.0W 3.4-5.4 AAAAA  Puerto Rico                

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

For most events there are two listings. The first line is the observed event starting with "O:" for Observed. There follows the date, month and year, the time in UT hours:minutes:seconds, the latitude and longitude, the given magnitude and the reporting agency followed by the geographic location. The second line starts with "P:" This is the forecast event as forecast in our summaries normally more than a month in advance. Magnitudes may vary in response to updated seismic watches and daily variations due to tidal and other influences. This line has the forecast date, month and year, the forecast number, latitude, longitude and forecast magnitude range.  This is followed by a comparison between the forecast and the event. The comparison includes letters A-D. The first is number of days difference from predicted (A:up to 2, B3-5; C:6-10; D:more than 10), Difference in latitude (A:up to 1 degree; B:1-2 degrees; C:2-4 degrees; D:more than 4 degrees); longitude (same comparison as with latitude); magnitude (A: within forecast range; B: higher than forecast range; C: lower than forecast range; D: no comparison possible). The last letter is a stand in for a future comparison which needs to be done statistically after a large number of forecasts have been made. In previous data, an excellent match is generally AAAAA; a good match as one or two B's; a fair match has several B's and C's and a poor match is one which contains a number of C's or D's. 

 

ASIA

 

O: 26AUG2024 01:32:02  52.9N  159.6E MB=4.9  EMSC   OFF EAST COAST OF KAMCHATKA  

P: 28AUG2024 165757    52.0N  161.0E 4.0-5.4 AAAAA  E. of Kamchatka            

 

EMSC reported this earthquake of M 4.9 in Kamchatka, Russia was felt with intensity up to IV in the area(s) of Kamchatka, Russia in Petropavlovsk, Yelizovo, Paratunka.

 

O: 26AUG2024 06:24:30  55.7N  164.4E MB=4.3  EMSC   KOMANDORSKIYE OSTROVA REGION 

P: 22AUG2024 165760    55.0N  165.0E 4.0-6.0 BAAAA  Komandorsky Isl            

 

O: 25AUG2024 17:35:39  26.0N   90.8E ML=3.9  EMSC   MEGHALAYA, INDIA REGION      

P: 22AUG2024 165640    27.0N   92.0E 4.0-5.4 BAAAA  Myanmar                    

 

EMSC reported this earthquake of M 3.9 in India was felt with intensity up to IV in the area(s) of India in Adabari, Dugrasorabar, Athgaon, Kharghuli Hills.

 

INDONESIA AND PHILIPPINES

 

O: 25AUG2024 11:45:53   1.7N  127.3E mb=4.3  EMSC   HALMAHERA, INDONESIA

O: 26AUG2024 00:17:04   1.1N  126.4E MB=5.2  EMSC   MOLUCCA SEA                  

P: 25AUG2024 165578     1.0N  125.0E 4.0-5.4 AABAA  Mindanao, Philippines      

 

O: 25AUG2024 20:58:30   2.7N  127.1E ML=4.0  EMSC   MOLUCCA SEA                  

P: 23AUG2024 165576     2.0N  128.0E 4.0-5.4 AAAAA  Halmahera                  

 

O: 25AUG2024 21:34:32   4.5S   99.1E ML=4.1  EMSC   SOUTHWEST OF SUMATRA, INDONESI

P: 27AUG2024 165601     2.0S  100.0E 4.0-5.4 ACAAA  So. of Sumatera            

 

O: 25AUG2024 15:35:08   5.8S  147.1E MB=5.1  EMSC   EASTERN NEW GUINEA REG., P.N.G

P: 25AUG2024 165593     5.0S  151.0E 4.0-5.5 AAAAA  New Ireland                

 

NEIC reported this earthquake of M 5.1 in Papua New Guinea was felt with intensity up to IV in the area(s) of Papua New Guinea in Goroka Eastern Highlands.

 

O: 25AUG2024 09:21:24  10.1N   93.8E MB=4.7  EMSC   ANDAMAN ISLANDS, INDIA REGION

P: 21AUG2024 165608    10.0N   92.0E 4.0-5.4 BABAA  Andaman Islands            

P: 23AUG2024 165608    12.0N   92.0E 4.0-5.6 ABBAA  Andaman Islands            

 

O: 25AUG2024 22:12:29  14.8N  147.1E MB=4.8  EMSC   MARIANA ISLANDS REGION       

P: 24AUG2024 165629    14.0N  146.0E 4.0-5.4 AAAAA  So. Marianas/Guam          

 

 

CENTRAL AND SOUTH AMERICA

 

O: 26AUG2024 05:08:44   7.4N   82.3W MW=5.8  EMSC   SOUTH OF PANAMA              

P: 29AUG2024 165574     7.0N   82.0W 3.5-5.3 BAAAA  Costa Rica                  

 

O: 25AUG2024 16:07:18  10.6N   86.5W MB=4.8  EMSC   OFF COAST OF COSTA RICA      

P: 26AUG2024 165624    12.0N   87.0W 3.5-5.5 ABAAA  Nicaragua                  

P: 29AUG2024 165574     9.0N   86.0W 3.5-5.4 BBAAA  Costa Rica                  

 

O: 25AUG2024 16:37:49  13.0N   89.0W ML=4.1  EMSC   OFFSHORE EL SALVADOR         

P: 25AUG2024 165614    14.0N   90.0W 3.5-5.3 AAAAA  Guatemala                  

 

O: 26AUG2024 06:43:22  13.3N   89.6W ML=4.0  EMSC   OFFSHORE EL SALVADOR

O: 25AUG2024 23:30:11  13.2N   87.9W MB=4.4  EMSC   EL SALVADOR                  

P: 30AUG2024 165624    13.0N   87.0W 3.5-5.5 BAAAA  Nicaragua                  

 

O: 25AUG2024 23:16:54  15.6N   95.1W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P: 27AUG2024 165612    15.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 26AUG2024 03:26:46  15.8N   97.0W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P: 26AUG2024 165627    16.0N   97.0W 3.5-5.3 AAAAA  Oaxaca, Mexico             

 

O: 25AUG2024 14:27:25  17.2N   96.4W MB=4.5  EMSC   OAXACA, MEXICO               

P: 23AUG2024 165612    17.0N   95.0W 3.5-5.1 AABAA  Chiapas, Mexico            

P: 26AUG2024 165627    16.0N   97.0W 3.5-5.3 ABAAA  Oaxaca, Mexico             

 

NEIC reported this earthquake of M 4.5 in Oaxaca, Mexico was felt with intensity up to V in the area(s) of Oaxaca, Mexico at Matatlan, IV in Santa Lucia del Camino, and II-III in Oaxaca, Huayapam, Puerto Escondido and in the state of Mexico at Tlalnepantla. 

 

O: 25AUG2024 21:35:08  18.5N   68.8W ML=3.2  EMSC   DOMINICAN REPUBLIC

O: 26AUG2024 05:16:09  17.9N   68.1W MB=4.6  EMSC   DOMINICAN REPUBLIC REGION    

P: 27AUG2024 165628    18.0N   67.0W 3.4-5.4 AAAAA  Puerto Rico                

 

O: 26AUG2024 00:18:48  18.1N   65.8W MD=3.0  EMSC   PUERTO RICO REGION           

P: 29AUG2024 165618    19.0N   65.0W 3.0-5.1 BAAAA  Leeward Islands            

 

O: 25AUG2024 11:56:42  18.4N   70.2W ML=3.6  EMSC   DOMINICAN REPUBLIC           

P: 29AUG2024 165632    20.0N   71.0W 3.0-4.9 BBAAA  Bahamas/No. Caribbean      

 

O: 25AUG2024 20:15:09  18.4N   73.6W ML=3.4  EMSC   HAITI REGION                 

P: 15AUG2024 165358    19.0N   72.0W 3.0-4.7 CABAA  Bahamas/No. Caribbean      

 

O: 25AUG2024 22:56:05  19.0N  105.2W ML=4.1  EMSC   OFFSHORE JALISCO, MEXICO

O: 25AUG2024 09:33:56  19.0N  105.2W ML=4.0  EMSC   OFFSHORE JALISCO, MEXICO     

P: 22AUG2024 165622    19.0N  104.0W 3.5-5.1 BAAAA  Michoacan, Mexico          

 

O: 25AUG2024 08:54:09  19.2N  102.5W ML=4.0  EMSC   MICHOACAN, MEXICO            

P: 22AUG2024 165622    19.0N  104.0W 3.5-5.1 BABAA  Michoacan, Mexico          

P: 26AUG2024 165622    18.0N  102.0W 3.5-5.2 ABAAA  Michoacan, Mexico          

 

O: 26AUG2024 00:24:10  19.2N   71.4W ML=3.0  EMSC   DOMINICAN REPUBLIC

O: 25AUG2024 20:59:30  19.4N   71.1W ML=3.2  EMSC   DOMINICAN REPUBLIC

O: 25AUG2024 16:41:11  19.6N   71.6W ML=3.1  EMSC   DOMINICAN REPUBLIC           

P: 29AUG2024 165632    20.0N   71.0W 3.0-4.9 BAAAA  Bahamas/No. Caribbean      

 

O: 25AUG2024 12:21:35  23.5S   67.1W ML=4.0  EMSC   JUJUY, ARGENTINA

O: 25AUG2024 17:47:42  23.6S   67.1W MB=4.4  EMSC   JUJUY, ARGENTINA             

P: 27AUG2024 165799    24.0S   66.0W 4.0-5.8 AAAAA  Argentina                  

 

O: 25AUG2024 09:38:57  25.2N  109.7W ML=3.9  EMSC   GULF OF CALIFORNIA           

P: 28AUG2024 165634    24.0N  109.0W 3.5-5.4 BBAAA  Gulf of California         

 

O: 25AUG2024 20:49:39  27.9N  112.1W ML=4.3  EMSC   GULF OF CALIFORNIA           

P: 18AUG2024 165362    28.0N  112.0W 3.5-4.9 CAAAA  Gulf of California          

 

O: 26AUG2024 06:21:09  32.2S   71.4W MW=4.6  EMSC   VALPARAISO, CHILE            

P: 27AUG2024 165814    34.0S   72.0W 4.0-5.7 ABAAA  Central Chile              

 

NEIC reported this earthquake of M 4.6 in Central Chile was felt with intensity up to IV in the area(s) of Central Chile in Valparaiso at Valparaiso, Vina del Mar, Villa Alemana and in Metropolitana in Santiago and San Bernardo.

EMSC reported strong shaking in Valparaiso, Chile at Puchuncavi, Quillota, Putaendo, Concon, Llaillay, Vina del Mar, Villa Alemana, Valparaiso, Colina, Lo Barnechea, Conchali, Pudahuel, Quinto Normal, Vitacura, Providencia, Las Condes, Santiago, Nunoa, Maipu, Macul, San Antonio, Santo Domingo, La Florida, San Bernardo, Puente Alto, Talagante, Ovalle.

GUC reportedd intensity IV in  Coquimbo at Illael, Los Vilos, Salamanca, Canela, Combarbala; III in Ovalle, Monte Patria, Punitaqui; in Valparaiso with V in Puchuncavi, Quintero and IV in San Antonio, Valparaiso; in Santiago with IV in Colina, Lampa, Tiltil; III in Macul, Buin, Paine, Penaflor; in O'Higgins with III in Rancagua, Codegua, Donihue, Machali, Las Cabras and Mostazal.

 

AFRICA AND EUROPE

 

O: 26AUG2024 04:11:39  38.1N    9.4W MB=5.4  EMSC   PORTUGAL                     

P: 13AUG2024 165401    37.0N   11.0W 3.5-4.9 DBBAA  Morocco/Spain              

 

O: 25AUG2024 23:56:35  63.9N   21.9W ML=3.4  EMSC   ICELAND REGION               

P: 23AUG2024 165778    63.0N   23.0W 3.0-4.6 AAAAA  Iceland area               

 

O: 25AUG2024 23:45:42  44.2N   11.5E ML=3.9  EMSC   NORTHERN ITALY               

P: 26AUG2024 165723    43.0N   13.0E 3.0-4.9 ABAAA  Italy                      

 

O: 26AUG2024 01:33:47  19.6S   33.8E ML=3.3  EMSC   MOZAMBIQUE                   

P: 27AUG2024 165806    22.0S   33.0E 4.0-5.8 ACAAA  So. Indian Ocean           

 

O: 25AUG2024 07:09:17  26.9S   26.6E ML=3.3  EMSC   SOUTH AFRICA                 

P: 28AUG2024 165804    26.0S   28.0E 3.0-4.9 AABAA  Rep. South Africa          

 

O: 26AUG2024 06:35:44  30.1S   28.8E ML=3.1  EMSC   SOUTH AFRICA                  

P: 28AUG2024 165804    26.0S   28.0E 3.0-4.9 ACAAA  Rep. South Africa          

 

SOUTHWEST PACIFIC

 

O: 25AUG2024 23:30:52  19.8S  175.0W mb=6.1  EMSC   TONGA

O: 25AUG2024 23:38:00  19.9S  175.2W mb=5.3  EMSC   TONGA

O: 25AUG2024 23:29:08  19.8S  175.1W MW=6.9  EMSC   TONGA                        

P: 25AUG2024 165809    21.0S  175.0W 4.0-5.7 ABAAA  Tonga Islands              

 

O: 25AUG2024 15:54:49  19.7S  177.3W MB=4.4  EMSC   FIJI REGION                  

P: 24AUG2024 165795    19.0S  177.0W 4.0-5.6 AAAAA  Tonga Islands              

 

OCEAN RIDGES

 

No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 25AUG2024 06:59:19  32.4S  150.9E ML=2.5  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 25AUG2024 09:38:49  32.4S  150.8E ML=2.4  EMSC   NEW SOUTH WALES, AUSTRALIA

 

JAPAN AND KURIL ISLANDS

 

No earthquakes of M>=4 were located in Japan or the Kuril Islands today.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 25AUG2024 21:16:59  30.7N  115.8W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO

O: 25AUG2024 21:59:22  30.7N  115.8W ML=3.2  EMSC   BAJA CALIFORNIA, MEXICO

O: 25AUG2024 22:15:03  30.8N  116.3W ML=3.1  EMSC   OFFSHORE BAJA CALIFORNIA, MEXI

P: 30AUG2024 165691    32.1N  116.4W 2.5-4.6 BAAAA  So. California             

 

O: 25AUG2024 08:18:15  33.3N  116.4W ML=2.5  EMSC   SOUTHERN CALIFORNIA          

P: 30AUG2024 165691    32.1N  116.4W 2.5-4.6 BBAAA  So. California             

 

NEIC reported this earthquake of M 2.5 in Southern California was felt with intensity up to IV in the area(s) of Southern California in Borrego Springs, San Diego, Idyllwild.

 

O: 25AUG2024 11:00:28  38.7N  118.6W ML=2.1  EMSC   NEVADA                       

O: 25AUG2024 16:28:00  38.7N  118.6W ML=2.2  EMSC   NEVADA                       

P: 29AUG2024 165655    38.6N  118.6W 2.5-5.0 BAAAA  California/Nevada area     

 

O: 25AUG2024 16:56:47  38.8N  122.8W MD=2.2  EMSC   NORTHERN CALIFORNIA          

P: 23AUG2024 165659    38.9N  122.8W 2.5-4.7 AAAAA  Central California         

 

O: 26AUG2024 05:07:13  40.4N  124.5W MD=2.0  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P: 22AUG2024 165737    40.3N  124.7W 2.5-4.4 BAAAA  Off Coast of No. Calif     

 

 

ALASKA

 

O: 25AUG2024 20:48:57  54.4N  160.2W ML=3.6  EMSC   ALASKA PENINSULA             

P: 22AUG2024 165770    54.5N  161.8W 3.5-4.9 BAAAA  Unimak Islands, Aleutians  

 

O: 26AUG2024 04:20:01  59.0N  151.1W ML=3.2  EMSC   KENAI PENINSULA, ALASKA      

P: 31AUG2024 165773    60.1N  150.6W 3.2-5.1 BAAAA  Central Alaska             

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

No events of M>=2 were located in the northwestern U.S. or western Canada today.

 

ROCKY MOUNTAINS REGION

 

O: 25AUG2024 15:27:01  31.6N  104.0W ML=2.0  EMSC   WESTERN TEXAS

O: 26AUG2024 01:55:40  31.6N  104.0W ML=3.0  EMSC   WESTERN TEXAS                

P: 24AUG2024 165688    31.2N  104.1W 2.0-3.9 AAAAA  SW U.S.A                   

 

EASTERN U.S./CANADA

 

O: 26AUG2024 02:46:47  35.0N   97.8W ML=2.0  EMSC   OKLAHOMA

O: 26AUG2024 00:12:26  35.0N   97.8W ML=2.5  EMSC   OKLAHOMA                     

P: 25AUG2024 165703    36.0N   97.0W 2.0-4.1 AAAAA  Southern Plains            

 

HAWAII

 

No earthquakes of M>=3 were located in Hawaii.

 

SERIES OF MODERATE QUAKES IN TONGA/FIJI WITH SOLAR FLARES

 

EARTHQUAKE SUMMARY FOR AUGUST 24, 2024

 

The strongest earthquake in the world today was an M 5.0 in Tonga/Fiji. This event was accompanied by a series of similar-sized earthquakes in the area, many of which occurred at the beginning of C- or M-class solar flares. This summary watches for concentrations of this type in the "FLARE" section of this summary because it may be that instability in a zone such as this may suggest a stronger regional earthquake is likely in the near future. At this writing it has been nearly a year since a significant earthquake in this area. These are sometimes promoted by regional passing meteorological storms but no strong storms are currently in the area. Following are some of the  events and associated solar flares today (Data from SWPC):

 

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

6450       0002   0014      0020   M1.6      (August 24, 2024)   8.7E-03  

Fiji M 4.6 00:49 UT

 

6470       0251   0257      0303   C6.9      (August 24, 2024)   2.4E-03  

Fiji M 4.5 02:50 UT

 

6600       1332   1337      1344   C3.8      (August 24, 2024)   9.1E-04  

Fiji M 4.9 13:32 UT

 

6720       1917   1930      1935   M1.4      (August 24, 2024)   1.3E-02  

Fiji M 5.0 19:51 UT

 

Many of today's events in Tonga and Fiji occurred within a minute of the beginning of solar flares whereas two followed M-class solar flares about 20-30 minutes later and may have been triggered by SFE with these flares.

 

Forecasts 165809 and 165546 had expected this activity in Tonga/Fiji was likely around August 19-21.

 

O: 24AUG2024 19:51:00  20.8S  179.0W mb=5.0  EMSC   FIJI REGION                  

P: 21AUG2024 165809    20.0S  178.0W 4.0-5.6 BAAAA  Tonga Islands              

 

O: 24AUG2024 13:31:39  23.4S  179.8W mb=4.9  EMSC   SOUTH OF FIJI ISLANDS        

P: 19AUG2024 165546    22.0S  179.0W 4.0-5.6 BBAAA  Tonga Islands              

 

O: 24AUG2024 00:49:04  20.5S  178.4W MB=4.6  EMSC   FIJI REGION                  

P: 21AUG2024 165809    20.0S  178.0W 4.0-5.6 BAAAA  Tonga Islands              

 

O: 24AUG2024 02:50:26  24.3S  179.9E MB=4.5  EMSC   SOUTH OF FIJI ISLANDS        

P: 29AUG2024 165811    25.0S  179.0E 4.0-5.6 BAAAA  Tonga/Fiji                 

 

The strongest earthquake in the U.S. or Canada today was an M 4.8 in Alberta, Canada near Fox Creek. This event may have been lightly felt in the epicentral area. It is the strongest earthquake located within about 200 km of today's epicenter since an M 5.0 on March 16, 2023 and prior to that events of M 4.9 and M 5.3 on November 29 and 30, 2022. At the time of the March, 16, 2023 events this summary noted in this regard:

 

 

"The strongest earthquakes in the U.S. or Canada today occurred as an M 4.5, 4.8 and 5.1 in Alberta, Canada. These were reported by NEIC with intensity V in Alberta in Grimshaw and IV in Peace River with II-III shaking in Falher, High Prairie, Fairview, Valleyview, Spirit River, Slave Lake, Fox Creek, Grand Prairie, Barrhead and Athabasca. These events are apparently aftershocks of an M 5.3 which hit the same epicenter on November 30, 2022. At the time this summary noted in this regard:

 

"The largest earthquake in the U.S. or Canada today was an M 5.3 in Alberta, Canada. The mainshock was felt widely in Alberta with maximum intensity IV in Peace River, Falher, High Prairie, Manning, Fairview, and III in Grimshaw, Valleyview, Slave Lake, Spirit River and Sexsmith. It was followed by an aftershock of M 4.5 which was reported felt with intensity IV in Alberta at Slave Lake, Whitecourt and II-III in Peace River, High Prairie, Fairview, Grande Prairie, Athabasca, High Leven and Wood Buffalo and in Dawson Creek, British Columbia. Foreshocks of M 4.6 and 4.9 to the M 5.3 was felt in the same area as the mainshock with maximum intensity IV in Alberta at Peace River, High Prairie, Spirit River, Sexsmith, Slave Lake and in Dawson, BC.  This activity is a continuation of events which hit the area on November 22-24, 2022. That included an M 4.5 which previous to the M 5.3 today was the largest earthquake in the area in more than 35 years ..." (March 16, 2023)

 

Forecast 165751 had expected enhanced seismicity within about 250 km of this epicenter in Alberta was likely around August 21.

 

O: 24AUG2024 12:50:09  54.5N  117.5W MB=4.8  ECAN W OF FOX CREEK, AB 

O: 24AUG2024 12:50:11  54.6N  117.3W mb=4.2  EMSC   ALBERTA, CANADA              

P: 21AUG2024 165751    56.0N  120.0W 2.0-4.0 BBBAA  Alberta                     

 

MODERATE AFTERSHOCKS CONTINUE IN NEW SOUTH WALES, AUSTRALIA

 

EARTHQUAKE SUMMARY FOR AUGUST 23, 2024

 

 

A second earthquake of M 4.8 occurred in the Denman area of New South Wales today. This follows a similar event reported in this summary in the previous issue as:

 

"An unusually large earthquake of M 4.8-5.0 occurred today in New South Wales, Australia. NEIC reported it was felt in New South Wales with maximum intensity V in Muswellbrook and II-III in Singleton, Cessnock, Kurri Kurri, Raymond Terrace, Wang-Rathmines, Newcastle, Lemon Tree Passage, Mudgee, Richmond-Windsor, Tamworth, Lawson-Hazelbrook, Katoomba-Wentworth, Forster-Tuncurry, Taree, Gunnedah, Sydney, Orange and Port Macquarie. EMSC reported houses shook violently in Muswellbrook, NSW, Australia with moderate to strong shaking in Newcastle, Maitland, Windeyer, Sydney, Internet reports indicated slight damage with broken glass and plaster breakage in the epicentral area." (August 23, 2024)

 

Today's earthquake was followed by a number of light aftershocks which were felt in the epicentral area. NEIC reported today's event was felt with maximum intensity V in New South Wales at Forster-Tuncurry and IVin Kurri Kurri and Muswellbrook and II-III in Cessnock, Mudgee, Newcastle, Richmond-Windsor, Nelson Bay, Katoomba-Wentworth Falls, Camden, Haven. EMSC reported a loud rumble at Muswellbrook.

 

Today's mainshock  (see previous summary) in  New South Wales may have been triggered by a Solar Flare (#6020). This flare was first observed within a minute of the earthquake in Australia where it was within several minutes of local solar noon at the time of the flare and earthquake. These are ideal conditions for Solar Flare Effects to trigger seismicity. Today's aftershock of M 4.8 also occurred with a strong solar flare (#6510  and 6490) where were a strong radio flare and a C4.2 which respectively began and maximized at the time of the M 4.8 in Australia and were likely promoted by SFE. Following is data from SWPC for this flare:

 

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

6020       0203   0210      0219   C5.9      (August 23, 2024)   5.3E-03  

New South Wales, Australia M 4.8 02:02 UT

 

6510       0610   0624      0634   C4.2      (August 24, 2024)   5.8E-03  

6490       0631   ////      1724   CTM1      (August 24, 2024)   5.8E-03  

New South Wales, Australia M 4.8 06:31 UT

 

O: 23AUG2024 16:26:28  32.4S  150.9E ML=2.5  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 23AUG2024 18:57:42  32.4S  150.9E ML=2.5  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 23AUG2024 23:13:55  32.4S  150.9E ML=2.6  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 24AUG2024 05:56:01  32.4S  150.9E ML=2.5  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 24AUG2024 06:31:39  32.4S  150.8E ML=4.8  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 24AUG2024 06:43:05  32.4S  150.9E ML=2.7  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 24AUG2024 03:06:01  32.5S  150.9E ML=2.7  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 23AUG2024 15:10:20  32.4S  150.9E ML=3.2  EMSC   NEW SOUTH WALES, AUSTRALIA   

O: 23AUG2024 02:01:59  32.4S  150.9E Mw=4.8  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 23AUG2024 02:15:44  32.3S  150.9E ML=2.9  EMSC   NEW SOUTH WALES, AUSTRALIA   

 

 

A moderate earthquake of M 4.3 occurred today in the area of Nevada near the Central California border. It was followed by a series of light, felt aftershocks. NEIC reported this activity was felt with intensity up to IV in Nevada at Reno and Hawthorne. NEIC reported the mainshock with intensity VI-V in Nevada at Hawthorne, and II-III in Schurz, Wellington, Fallon, Carson City, an Tonopah and in California at Sonora, Twain Harte, El Portal, Arnold, Yosemite National Park, Coleville among others. The mainshock was accompanied by a series of felt but light foreshocks. Today's M 4.3 is the strongest earthquake within about 100 km of today's epicenter since an M 4.5 two years ago on August 8, 2022 and a year before that on August 27, 2021. in the August, 2022 issue of this summary, it was noted in this regard:

 

"The M 4.4-4.6 on the border between Central California and Nevada today occurred within minutes of local solar noon and was probably promoted by high tidal/geomagnetic effects which maximize near this hour as well. NEIC reported it was felt with intensity II-III in California at Topaz, Coleville, Gardnerville, Markleeville, Bridgeport and in Nevada at Wellington, Smith, Gardnerville, Minden among others. NEIC reported aftershocks of M 2.5-3.5 in Central California were felt with intensity II-III in the area(s) of  in Carson City, Nevada. The M 4.4-4.6 is the strongest aftershock of the M 6.0 which shook the area on July 8, 2021 since that date." (August 8, 2022)

 

These events are still more than 50 km from today's epicenter. The last within this range was an M 5.7 and 5.5 on December 28, 2016.

 

Forecasts 165383 and had expected a moderate earthquake in this area was likely around August 18-29 within about 10 km of this event.

 

O: 23AUG2024 14:06:19  38.7N  118.7W ML=2.1  EMSC   NEVADA

O: 23AUG2024 14:51:22  38.7N  118.6W ML=3.2  EMSC   NEVADA

O: 23AUG2024 15:03:40  38.7N  118.6W ML=2.1  EMSC   NEVADA

O: 23AUG2024 15:31:58  38.7N  118.6W Mw=4.3  EMSC   NEVADA

O: 23AUG2024 15:35:30  38.7N  118.6W ML=2.1  EMSC   NEVADA

O: 23AUG2024 15:39:36  38.7N  118.6W ML=2.3  EMSC   NEVADA

O: 23AUG2024 15:59:44  38.7N  118.6W ML=2.8  EMSC   NEVADA

O: 23AUG2024 16:32:46  38.7N  118.6W ML=2.0  EMSC   NEVADA

O: 23AUG2024 23:20:16  38.7N  118.6W ML=2.5  EMSC   NEVADA

O: 23AUG2024 23:33:11  38.7N  118.6W ML=2.1  EMSC   NEVADA

O: 24AUG2024 02:02:28  38.7N  118.6W ML=2.0  EMSC   NEVADA

O: 24AUG2024 02:29:27  38.7N  118.6W ML=2.5  EMSC   NEVADA

O: 24AUG2024 04:14:00  38.7N  118.6W ML=3.2  EMSC   NEVADA

O: 24AUG2024 04:19:18  38.7N  118.6W ML=2.7  EMSC   NEVADA

O: 24AUG2024 04:25:09  38.7N  118.6W ML=2.2  EMSC   NEVADA

O: 23AUG2024 13:43:06  38.7N  118.6W ML=3.0  EMSC   NEVADA                       

O: 24AUG2024 05:56:33  38.7N  118.8W ML=2.1  EMSC   NEVADA                       

O: 23AUG2024 21:12:09  38.8N  118.6W ML=2.1  EMSC   NEVADA                        

P: 18AUG2024 165383    38.6N  118.6W 2.5-4.8 CAAAA  California/Nevada area     

P: 29AUG2024 165655    38.6N  118.6W 2.5-5.0 CAAAA  California/Nevada area     

 

 

 

 

UNUSUAL MODERATE QUAKE SHAKES NEW SOUTH WALES, AUSTRALIA

 

EARTHQUAKE SUMMARY FOR AUGUST 22, 2024

 

 

An unusually large earthquake of M 4.8-5.0 occurred today in New South Wales, Australia. NEIC reported it was felt in New South Wales with maximum intensity V in Muswellbrook and II-III in Singleton, Cessnock, Kurri Kurri, Raymond Terrace, Wang-Rathmines, Newcastle, Lemon Tree Passage, Mudgee, Richmond-Windsor, Tamworth, Lawson-Hazelbrook, Katoomba-Wentworth, Forster-Tuncurry, Taree, Gunnedah, Sydney, Orange and Port Macquarie. EMSC reported houses shook violently in Muswellbrook, NSW, Australia with moderate to strong shaking in Newcastle, Maitland, Windeyer, Sydney, Internet reports indicated slight damage with broken glass and plaster breakage in the epicentral area. This earthquake is near the antipode of Hurricane Ernesto currently near the Azores in the North Atlantic and may have been promoted by antipodal energy focusing from that storm which was described in this summary on August 19 as:

 

"Hurricane Ernesto continued in the North Atlantic today east of Maine and Nova Scotia with winds up to 80 kts. It is expected to track into the North Atlantic and not to have significant effect on regional seismicity until it reaches the Northern Mid-Atlantic and Reykjanes ridges where stresses from this storm may promote a moderate to large regional ridge earthquake. Some enhanced seismicity in northern Europe could occur after it enters that region." (August 19, 2024)

 

Today's M 4.8 in New South Wales is the strongest in the New South Wales area within about 300 km of today's epicenter since an M 5.4 on August 6, 1994.

 

O: 23AUG2024 02:01:59  32.4S  150.9E Mw=4.8  EMSC   NEW SOUTH WALES, AUSTRALIA

O: 23AUG2024 02:15:44  32.3S  150.9E ML=2.9  EMSC   NEW SOUTH WALES, AUSTRALIA   

 

The strongest earthquake located in the U.S. or Canada today was an M 4.7 in Hawaii. NEIC reported maximum shaking of IV was felt in Hawaii at Pahoa with intensity II-III at Volcano, Mountain View, Hawaii National Park, Kurtistown, Keaau, Hilo, Pahala, Papaikou, Pepeekeo, Hakalau, Honomu, Papaaloa, Naalehu, Paauilo, Laupahoehoe, Captain Cook, Holualoa, Kealakekua, Honokaa, Kamuela, Kailua Kona, Kapaau, Kualapuu, Honolulu and Waimea. EMSC reported it at M 4.7 was felt with moderate jolt in Volcano, Eden Roc, Mountain View, Pahoa, Keaau, Hilo, Pepeekeo. Several hurricanes are currently located near Hawaii and the impact of low pressures with these storms may have helped trigger today's M 4.7 in Hawaii as noted in this and previous summaries:

 

"TS Hone  formed southeast of Hawaii today in the north Pacific with winds up to 50 kts  It is expected to track towards Hawaii in the next several days passing to the south of the big Island of Hawaii. Seismicity has increased in Hawaii perhaps indicating a new upcoming eruption which could be triggered by low pressures with TS Hone." (August 22-23, 2024)

 

This is the strongest earthquake in Hawaii since an M 5.7 on February 9, 2024.  At the time this summary noted:

 

"The strongest earthquake in the U.S. or the world today was an M 5.7 in the Mauna Loa region of Hawaii (initially given as M 6.3). NEIC reported it was felt as far as Honolulu and throughout the island of Hawaii with intensity up to VII. Foreshocks of M 2.9 and 3.0 were also reported felt in Pahala, Hawaii with intensity up to IV.  EMSC reported strong to violent shaking in Hawaii at Naalehu, Mountain View (with oud earthquake nose) Kealakekua, Fern Acres, Keaau, Pahoa, Hilo, Kailua Kona, Pepeekeo, Honokaa, Wailea, Wailuku, Maui, Lahaina, Honolulu, Kailua, Kaneohe. Minor damage which included items being thrown from shelves and minor damage to structures was reported which included cracked walls. This is the strongest earthquake in Hawaii since an M 6.2 on October 10, 2021 and an M 6.9 on May 4, 2018 - the largest in Hawaii in the past 35 years. the only other event in Hawaii with M>=6.2 in this time period was an M 6.7 on October 15, 2006." (February 9, 2024)

 

 

Forecast 165616 had expected today's event within about 25 km was likely

around August 21, 2024.

 

O: 22AUG2024 10:52:44  19.3N  155.1W ML=4.7  EMSC   ISLAND OF HAWAII, HAWAII     

P: 21AUG2024 165616    19.3N  155.3W 3.0-4.6 AAAAA  Hawaii (Eruption)          

 

The strongest earthquakes in the world today were a pair of events of M 5.5 each in the Indian Ocean south of Africa. They were not felt in this remote area. This epicenter is at the antipode of the Unimak and Alaska Peninsula and could enhance seismicity in that area in the next several days.  A strong M 6.7 hit about 250 km east of this epicenter on July 10, 2024 but the last within this distance from today's event of equal or larger magnitude was an M 5.5 on December 12, 2021. At the time of the M 6.7 in July, 2024 this summary noted:

 

"The strongest earthquake in the world today was an M 6.7 south of Africa. This event was not reported felt in this remote area and is the second strongest in the world since an M 7.2 in Taiwan on April 2, 2024; an M 6.7 in the northern Marianas on April 5, 2024 and a similar M 7.2 in Southern Peru on June 28, 2024. This is the strongest earthquake in this region south of Africa in more than 35 years. Smaller events in the region east of this epicenter occurred with M 6.1 on December 22, 2023; September 28, 2004 (M 6.4) and March 11, 1991 (M 6.4.). " (July 10, 2024)

 

Forecast 165827 had expected enhanced seismicity within about 250 km of today's epicenter was likely at the end of August.

 

O: 23AUG2024 04:45:18  53.0S   21.1E mb=5.5  EMSC   SOUTH OF AFRICA

O: 23AUG2024 04:48:57  52.9S   21.1E mb=5.5  EMSC   SOUTH OF AFRICA              

P: 29AUG2024 165827    53.0S   19.0E 4.0-5.9 CABAA  Atlantic-Indian Ridge      

 

The current volcanic eruption south of Reykjavik, Iceland continued today. Among a number of lightly felt earthquakes today an M 3.4 was felt with strong shaking in Iceland at Reykjanesbaer, Kopavogur and Reykjavik. This continues a strong series of volcanic events in the world associated with the full moon of August 19 as noted in the previous issue of this summary:

 

"A series of volcanic eruptions occurred over the past several days. These were closely associated with tidal stresses associated with the full moon of August 20, 2024. The effects of these stresses had been noted in previous issues of this summary as likely:

 

"The full moon arrives at 18:26 UT on August 19, 2024.   Longitudes which are at local solar midnight at this time are near 85 East while those at local solar noon are near 95 West. These include areas of central North America and the East Pacific in the west and central Asia including China, India, Nepal in the East. These areas are most likely to see moderate tidal triggering at this time. Tidal enhancement of regional seismicity is possible in many areas, however, a major earthquake associated with this new moon is considered possible in the next week by this report." (August 19-21, 2024)

 

Forecast 165778 had expected this eruption at this time was likely within about 100 km around August 23.

 

O: 22AUG2024 21:47:26  64.3N   23.6W ML=3.2  EMSC   ICELAND REGION

O: 22AUG2024 22:37:38  63.9N   22.3W ML=3.5  EMSC   ICELAND REGION               

P: 23AUG2024 165778    63.0N   23.0W 3.0-4.6 AAAAA  Iceland area               

 

A strong eruption occurred in Volcan de Fuego at the time of the full moon. This

volcano is in Antigua, Guatemala. at 14.4N 90.9W. In addition a volcano south of Reykjavik, Iceland; several in the area of Indonesia, several in Kamchatka, Russia also were in continuing eruptions. Other areas where seismicity may indicate fresh upcoming eruptions included the Canary Islands and Hawaii." (August 22, 2024)

 

 

 

VOLCANISM INCREASES WITH FULL MOON

 

EARTHQUAKE SUMMARY FOR AUGUST 21, 2024

 

A series of volcanic eruptions occurred over the past several days. These were

closely associated with tidal stresses associated with the full moon of August 20, 2024. The effects of these stresses had been noted in previous issues of this summary as likely:

 

"The full moon arrives at 18:26 UT on August 19, 2024.   Longitudes which are at local solar midnight at this time are near 85 East while those at local solar noon are near 95 West. These include areas of central North America and the East Pacific in the west and central Asia including China, India, Nepal in the East. These areas are most likely to see moderate tidal triggering at this time. Tidal enhancement of regional seismicity is possible in many areas, however, a major earthquake associated with this new moon is considered possible in the next week by this report." (August 19-21, 2024)

 

A strong eruption occurred in Volcan de Fuego at the time of the full moon. This

volcano is in Antigua, Guatemala. at 14.4N 90.9W. In addition a volcano south of Reykjavik, Iceland; several in the area of Indonesia, several in Kamchatka, Russia also were in continuing eruptions. Other areas where seismicity may indicate fresh upcoming eruptions included the Canary Islands and Hawaii.

 

The strongest earthquake in the world today was an M 5.4 aftershock of the M 7.0 in Kamchatka which occurred on August 17. EMSC reported today's event was felt with moderate shaking in Kamchatka, Russia at Petropavlovsk, Vilyuchinsk, Yelizovo. At the time of the mainshock this summary noted:

 

 

"A major earthquake occurred today in the area of Kamchatka. A tsunami warning  was issued but major waves were not observed. This earthquake was followed shortly afterwards by a major volcanic eruption of Sheveluch Volcano which endangered the lives of a number of unauthorized hikers. This eruption caused air traffic and placed the region off limits to residents and visitors. NEIC reported the earthquake was felt with strong intensity (and minor damage)

in Kamchatka with intensity VIII in Oetropavlovsk, and VI in Mohovaja and Jelizovo, Russia. EMSC added the quake was felt strongly in Kamchatka at Pionerskoye, Yelizovo, Razdol'nenskoye, Ust'-Kamchatskoye. Immediate moderate aftershocks of M 4.5, 4.6 and 5.0 were also moderately felt in Kamchatka. Russian news outlets reported residents noted it was "the strong shaking in a long time". No major damage has been reported but some minor damage was reported in the area.

 

The only report of a tsunami with this earthquake was from a gauge in the north Pacific which measured a maximum tsunami height of 00.25 meters." (August 18, 2024)

 

Forecast 165757 had expected this earthquake was likely in later August within  about 100 km of these epicenters.

 

O: 21AUG2024 09:30:34  52.4N  162.2E MB=4.0  EMSC   OFF EAST COAST OF KAMCHATKA  

O: 21AUG2024 08:43:32  52.6N  161.1E mb=4.3  EMSC   OFF EAST COAST OF KAMCHATKA

O: 21AUG2024 08:25:16  52.7N  160.9E mb=4.7  EMSC   OFF EAST COAST OF KAMCHATKA

O: 21AUG2024 23:30:35  52.9N  160.1E mb=5.4  EMSC   OFF EAST COAST OF KAMCHATKA

P: 28AUG2024 165757    52.0N  161.0E 4.0-5.4 CAAAA  E. of Kamchatka            

 

O: 21AUG2024 14:17:22  54.4N  161.5E MB=4.3  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 23AUG2024 165757    55.0N  160.0E 4.0-6.0 AAAAA  E. of Kamchatka            

 

O: 21AUG2024 17:45:36  51.2N  157.8E MB=4.5  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 21AUG2024 165759    53.0N  158.0E 4.0-5.7 ABAAA  Kamchatka                  

 

The strongest earthquake in the U.S. or Canada today was an M 3.8 in Southern Alaska. NEIC reported this earthquake of M 3.8 in Southern Alaska was felt with intensity up to II-III in the area(s) of Southern Alaska in Valdez, Eagle River, Chugiak and Anchorage.   The last earthquake within about 100 km of this epicenter with M>=3.8 occurred as an M 3.8 about 100 km west of this on July 31, 2024.

 

Forecast 165774 had expected today's event within about 50 km was likely around

August 22.

 

O: 22AUG2024 02:40:21  61.3N  147.0W ML=3.8  EMSC   SOUTHERN ALASKA              

P: 22AUG2024 165774    60.6N  147.6W 3.2-5.0 AAAAA  Central Alaska             

 

An earthquake of M 3.6 also occurred today in the area of southeastern Alaska near Juneau and was followed by an M 3.0 aftershock near local solar noon. This may have been promoted by tidal stresses with the full moon which maximize near this hour. Forecast 165756 had expected activity within about 50 km  of this epicenter would be enhanced around August 20-22.

 

O: 20AUG2024 21:28:58  58.3N  132.4W MB=3.0  ECAN OF JUNEAU, AK                  

O: 20AUG2024 17:50:09  59.0N  134.6W MB=3.6  ECAN OF JUNEAU, AK                  

P: 22AUG2024 165756    58.3N  133.5W 3.0-5.4 AAAAA  British Colombia           

 

MODERATE QUAKE NEAR GREENLAND ON QUIET DAY

 

EARTHQUAKE SUMMARY FOR AUGUST 11, 2024

 

 

It was a quiet day in global seismicity today. The only notable earthquake, andthe largest event in the world was an M 5.1 in Greenland north of Norway. This is the largest earthquake in the Greenland Sea since an M 5.5 on July 23, 2021 and the largest within about 200 km since an M 5.5 on December 13, 2023. At

the time this summary noted:

 

"The strongest earthquakes in the world today occurred in the Norwegian Sea with M 5.5 and 5.3. These events were not reported felt in this remote region. They occurred at a longitude where tidal stresses associated with the new moon of December 12 were strongest as noted in this summary in previous issues

 

...

 

The last earthquake within about 300 km of today's epicenter in the Norwegian Sea with M>=5.5 occurred three years ago with M 5.8 on December 14, 2020. This occurred with a solar eclipse and an M 4.8 in Nevada and an M 6.0 in  Antofagasta, Chile. At the time this summary noted:

 

 

"A moderately strong earthquake of M 5.8 also hit in the Norwegian Sea today. It was not reported felt in this remote area. The last earthquake within about 200 km of this epicenter of equal or larger magnitude was an M 6.7 pm November 9, 2018 and closer to this epicenter an M 6.2 on May 24, 2012." (December 14, 2020, December 13, 2023)

 

 

In the July 23, 2021 issue of this summary it was noted:

 

 

"The strongest earthquake in the world today was an M 5.5 in the Greenland Sea. It was not reported felt in this remote area. It may have been promoted by the minor geomagnetic storm at high latitudes which occurred today, the strongest in more than a month. This summary noted this possibility as:

 

...

 

A slightly smaller event at this epicenter in the Greenland Sea occurred on March 23, 2021. At the time this summary noted:

 

"The M 5.3-5.4 in the Greenland Sea is the largest in that area within about 300

km of this epicenter since an M 5.6 on February 8, 2018 and prior to that an M 6.5 on March 5, 2009." (March 24, 2021, July 23, 2021)

 

This continued enhanced seismicity in in the area of Greenland as reported in

the previous issue of this summary:

 

 

"The largest and most unusual earthquake in the vicinity of the U.S. or Canada today was an M 4.5 in Western Greenland. A series of events of M 4.5-4.6 hit this area of Greenland in January, 2022 and December, 2022 and January 2023 but the only event in the area with significantly larger magnitude in the past 35 years was an M 5. on October 14, 1998." (August 10, 2024)

 

Forecast 165520 had expected today's event within about 100 km was likely around August 13, 2024.

 

O: 12AUG2024 01:08:35  74.8N    8.4E MB=5.1  EMSC   GREENLAND SEA                

P: 13AUG2024 165520    74.0N   14.0E 3.0-4.4 AAAAA  Norway                      

 

The strongest earthquake in the U.S. or Canada today was an M 3.8 in Central

California. The last earthquake of M>=3.8 within about 100 km of today's epicenter occurred on April 16, 2024 with M 3.8-3.9 but the last event in the region of larger magnitude was an M 4.6 on July 15, 2022. At the time this summary noted:

 

"The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Ridgecrest area of Central California. NEIC reported this earthquake of M 4.6 in the California-Nevada border region was felt with intensity II-III in the area(s) of the California-Nevada border region with IV in Ridgecrest and Trona and lesser shaking in Inyokern, Weldon, Lake Isabella, Bodfish, Caliente, East Tulare County, Mojave and Wofford Heights. This is the strongest earthquake within about 100 km of this epicenter since an M 4.8  on August 19, 2020 - an aftershock of an M 5.8 on June 24, 2020. A series of moderate to strong earthquake began in this area of Ridgecrest in July 4 and 6, 2019 with M 6.4 and M 7.1 among many other moderate associated shocks. Today's event was likely triggered by high tidal stresses with the full moon of July 13" (July 15, 2022)

 

 

Forecast 165427 had expected today's event within about 10 km was likely around August 11.

 

O: 11AUG2024 09:46:04  36.0N  117.7W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 11AUG2024 09:45:12  35.9N  117.7W MW=3.8  EMSC   CENTRAL CALIFORNIA           

P: 11AUG2024 165427    35.9N  117.7W 2.5-4.8 AAAAA  So. California             

 

An unusual earthquake of M 2.4 also occurred today in Illinois. It was not reported felt in the epicentral area. This is the largest earthquake in Illinois within about 100 km of this epicenter since an M 2.5 on June 16, 2022. At the time this summary noted:

 

 

"An unusual earthquake of M 2.5 occurred today in eastern Illinois. NEIC reported it was felt in Illinois in Calhoun, Parkersburg, Olney, Sumner, Mount Carmel, Albion, Effingham and in Indiana at Princeton and Elletsville. This is the strongest earthquake in eastern Illinois within about 100 km of this epicenter since an M 3,8 on September 19, 2017 and an 3.4 on May 30, 2015. More recent earthquakes  in the area of M 2.4-2.5 occurred on May 17 and April 13, 2022." (June 16, 2022)

 

Forecast 165403 had expected today's event in Illinois within about 50 km  was likely in mid-August. This epicenter is at 103 degrees from the M 7.1 in Kyushu and was probably promoted by energy from that source. A similar event of M 2.2 in Virginia today was also at this distance from Kyushu, Japan. Forecast 165398 had expected this event around August 12.

 

O: 11AUG2024 03:10:39  38.1N   88.4W MD=2.4  ANSS   WSW OF ENFIELD ILLINOIS      

P: 14AUG2024 165403    38.0N   87.0W 2.0-4.3 BAAAA  New Madrid area            

P: 18AUG2024 165403    38.0N   89.0W 2.0-4.1 CAAAA  New Madrid area            

 

O: 11AUG2024 08:44:40  37.3N   80.6W MD=2.2  EMSC   VIRGINIA                     

P: 12AUG2024 165398    37.2N   81.9W 2.0-4.2 AAAAA  Kentucky/Tennessee/NC      

 

 

UNUSUAL, MODERATE QUAKE SHAKES ROMANIA

 

EARTHQUAKE SUMMARY FOR AUGUST 10, 2024

 

The most unusual earthquake in the world today occurred today as an M 4.4 in Romania. NEIC reported this earthquake of M 4.4 in Romania was felt with intensity up to IV in the area(s) of Romania in Arad at Savarsin (V); Bata Birchis and Inew and in Deva Hunedoara, and in Cluj at Savadisla, Floresti, Cluj-Napoca, Apahida and as far as Bucharest. EMSC reported moderate shaking in Romania at Varadia de Mures, Julita, Temeresti, Lugoj, Lipova, Buzard, Zabrani, Siria, Cicir, Horia, Bocsig, Santana, Arad among others. This is the strongest earthquake Romania within about 200 km of this shallow focus event since an M 4.5 on August 20, 2023 - an aftershock of an M 5.5 on February 14, 2023.

At that time this summary noted:

 

"No earthquakes of greater magnitude have occurred in southern Romania in at least 35 years. The last earthquakes of M 5.5-5.6 within about 200 km of today's epicenter hit west of this in Serbia on July 12 and 18, 1991. This activity is at 145-150 degrees from the strong earthquakes in the Tonga and Fiji areas in November and December, 2022 and at 105 degrees from the M 6.8 in Argentina of January 20, 2023 and at 100 degrees from the M 7.6 in Michoacan, Mexico of September 19, 2022 and  was probably promoted by energy from those sources." (February 14, 2023)

 

Forecasts 165443 and 165472 had expected regional seismic enhancement in

the area of Romania around August 11, 2024.

 

O: 10AUG2024 20:46:02  45.9N   22.0E ML=4.7  EMSC   ROMANIA                      

P: 11AUG2024 165443    45.0N   18.0E 3.0-5.6 AACAA  Adriatic Sea               

P: 11AUG2024 165472    41.0N   21.0E 3.0-5.4 ACAAA  Romania/NW Turkey          

 

The strongest earthquake in the world today was an M 5.2 in the area southeast of the Loyalty Islands. This continues seismic enhancement in this region as noted in the previous issue of this summary:

 

 

"A series of moderate to moderately large earthquakes occurred in the Tonga/Fiji/Kermadec Islands today. These included an M 5.9 in the Kermadec Islands and an M 5.6 in Fiji. None of these were reported felt in this remote region. The earthquake of M 5.9 in the Kermadec Islands occurred within minutes of local solar midnight and was probably promoted by strong tidal stresses at this hour. It is near the longitude of maximum tidal stress with the previous new moon and was probably also affected by this alignment. This summary had noted this possibility in previous issues as:

 

"The new  moon arrived on August 4, 2024 at 11:13 UT.  Longitudes which were at local solar noon at this time are located at about 15 East while those at local solar midnight are near 165 West. In the east these include most of western Europe and Iceland and the Atlantic Ridge while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/New Zealand and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this new 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 new  moon are considered  moderate to  high in the next week (August 1-10, 2024)." (August 3-10, 2024)

 

Forecast 165539 had expected today's activity in the Loyalty Islands around

August 11-15.

 

O: 10AUG2024 14:34:02  23.1S  170.6E MB=5.2  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

P: 11AUG2024 165539    22.0S  170.0E 4.0-5.6 ABAAA  Loyalty Islands            

P: 15AUG2024 165539    23.0S  170.0E 4.0-5.4 BAAAA  Loyalty Islands            

 

 

 

STRONG EARTHQUAKE SHAKES SEA OF OKHOTSH, RUSSIA

 

EARTHQUAKE SUMMARY FOR AUGUST 9, 2024

 

 

The strongest earthquake in the world today was an M 6.5 at a deep focus in the area of the Sea of Okhotsk, Russia. NEIC reported it was felt with intensity up to III in Dolinsk, Russia and in Sovetskaya Gavan Habarovsk, Russia and with II in Japan in Hokkaido, Aomori, Chiba and Shizuoka Prefectures. The last earthquake with M>=6.5 in the Sea of Okhotsk within about 300 km of today's epicenter was an M  7.7 on August 14, 2012 and prior to that an M 7.3 on November 17, 2002. At the time of the event 22 years ago (note solar cycle timing) on August 14, 2012 this summary noted:

 

"A major earthquake of M 7.7 hit at a deep epicenter beneath the Sea of Okhotsk today. It was felt strongly with intensity VI in Sakhalin at Makaraov and Poronaysk, and II-III in Katangli, Toyohara, Yuzhno-Sakhalinsk and Katangli; in Saha at Jakutskaj, Yakutsk, Magadan. In China intensity II was felt in Harbin, Heilongjiang; and in Japan throughout much of the island of Honshu in the prefectures of Kanagawa, Ibaraki, Tokio, Hokkaido, Aomori, with specific intensities reported from Yokohama, Tsukuba, Tokyo, Sapporo, Narita, Misawa, Koga, and Kawasaki. Because of the deep focus of this earthquake, no major damage occurred and there were no tsunamis identified. This earthquake ends the seismic drought which has been in effect since shortly after the great earthquakes in Sumatra of M 8.2 and 8.6 which occurred on April 11, 125 days ago. During the intervening period no earthquakes of M>=7 have been recorded in the world. Because this earthquake occurred at great depth, normal distance relations are slightly altered from those expected from surface focus. The earthquake may have been triggered by a pair of solar flare. Flare 7930 was a C1.1  class flare which maximized within two minutes of the occurrence of this earthquake. This flare had, by far, the strongest flux from any of the day's flares. The solar time at the epicenter of this earthquake when this  flare occurred was solar noon, that is the epicenter was sub-solar at the time of the earthquake. This is the maximum time for Solar flare effects and triggering is quite likely in this case.

 

This summary had anticipated the possibility of a major earthquake in this region at this time. When Tropical Storm Kirogi passed through the area

2-3 days ago we noted in our Weather-related summary section:

 

…

 

It may also be of some interest that foreshocks to this earthquake in the Sea of Okhotsk occurred on August 12 with M 4.4 and August 8, 2012 with M 4.7. This later event was the second largest in the area during 2012 after and event of M 4.8 on July 9, 2012. The SSS phase from this earthquake may have triggered a subsequent M 4.5 earthquake in Los Angeles as we noted in this summary at the time:

 

"the first event in Los Angeles of M 4.5 occurred as the SSS phase from the

Sea of Okhotsk was passing through the area." (August 9, 2012)

 

The epicenter of today's Sea of Okhotsk event was at 60 degrees (node 6) from both the large earthquakes in Sumatra and the Solomon Islands as noted in our summary of August 11 as follows:

 

"Node 6 (60 degrees)

Mauritius/Reunion to Moluccas               

Sumatra to  New Britain, Sea of Okhotsk,   

Solomon Islands to Kurils, Sea of Okhotsk" (August 11, 2012)

 

Subsequent triggering of distant earthquakes from the Sea of Okhotsk appears to have begun immediately today. Today's map shows the most likely locations of events to come. Among the more unusual earthquakes today those occurring at nodal distances from the Sea of Okhotsk included those in Pakistan (52 degrees, node 7); off northern California (60 degrees, node 6); Baja California (72 degrees, node 5); Ethiopia, Spain and New Zealand (90 degrees, node 4). The first event following was an M 4.9 on the Indian-Antarctic Ridge south of Australia. This event was at 101-102 degrees from the  Sea of Okhotsk, a distance at which triggering is expected due to the concentration of seismic energy at this distance following major earthquakes.

 

A moderate earthquake of M 5.2 hit within about 10 degrees of the antipode of the Sea of Okhotsk event 46 minutes earlier. The SS phase from this event was in the hypocentral area of the Sea of  at the time of that event and may have helped trigger it. This is the strongest earthquake within 300 km of this epicenter in the Sea of Okhotsk since an M 7.5 on October 11, 1956. A great earthquake sequence also hit the area between 1899 and 1907 with the strongest earthquake near today's epicenter an M 8.0 in June, 2002. This may have been  a double event on June 5 and 11, 1902. This sequence began with an M 7.5 on July 11, 1899 and again on January 31, 1900 (M 7.5). The time between this and the event in 1956 is 56 years. Adding 56 years to 1956 brings us to  the year 2012. It appears that there is an approximate 55-56 year interval between great quakes in the area. Furthermore, the history of the area  suggests that today's earthquake will likely be followed by at least one other event of similar size." (August 14, 2012)

 

 

Today's earthquake occurred at the tail end of an M5.0 solar flare, the strongest of the past day and may have been promoted by SFE associated with that flare. This flare occurred with maximum output when the epicenter in the Sea of Okhotsk, Russia was at local solar noon, a time when SFE is particularly likely.

SWPC Parameters for this flare follow:

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

XXXX       2110   2130      2200   M4.0      (August 9, 2024)    1.1E-03      

Western Greenland M 4.5 21:41 UT

 

XXXX       0200   0230      0330   M5.0      (August 10, 2024)   2.1E-03      

Sea of Okhotsk M 6.5 03:28 UT

 

Forecast 165192 had expected today's M 6.5 in the Sea of Okhotsk within about 200 km was likely around August 8, 2024.

 

O: 10AUG2024 03:28:32  47.2N  144.8E MW=6.5  EMSC   SEA OF OKHOTSK               

P:  8AUG2024 165192    49.0N  143.0E 3.5-5.5 ABAAA  So. Kurils                 

 

The largest and most unusual earthquake in the vicinity of the U.S. or Canada today was an M 4.5 in Western Greenland. A series of events of M 4.5-4.6 hit this area of Greenland in January, 2022 and December, 2022 and January 2023 but the only event in the area with significantly larger magnitude in the past 35 years was an M 5.0 on October 14, 1998. This event in Greenland occurred near the peak of the other M-class solar flare of the day and also was probably promoted by SFE from that flare.

 

O:  9AUG2024 21:41:13  60.8N   44.3W MB=4.5  EMSC   WESTERN GREENLAND            

 

An earthquake of M 5.0 was also widely felt in the region near Tokyo, Japan today as EMSC reported strong shaking in Japan at Hakone, Machida, Musashino, Tokyo, Urayasu, Nishi among others. Tropical Storm Maria was making landfall to the east. NEIC reported this earthquake was felt with intensity up to V in Kanagawa Prefecture, Japan at Isehara, Yamato, Kamakura; IV in Ayase, Ebina, Zushi, Hakone, and in Komae, Tokyo with lesser shaking of III-IV in the prefectures of Tokyo, Chiba, Yamanashi, Saitama, Shizuoka, and Ibaraki. Minor damage was reported from the area. A mega-earthquake warning from JMA remains in effect and has caused the PM of Japan to consider cancelling some foreign trips at this time.

 

Forecast 165118 had expected this event in Honshu within about 50 km of this epicenter was likely around August 5, 2024.

 

O:  9AUG2024 10:57:36  35.4N  139.2E MW=5.0  EMSC   NEAR S. COAST OF HONSHU,     

P:  5AUG2024 165118    35.0N  139.0E 3.5-4.9 BAAAA  No. Honshu, Japan          

 

A series of moderate to moderately large earthquakes occurred in the Tonga/Fiji/Kermadec Islands today. These included an M 5.9 in the Kermadec Islands and an M 5.6 in Fiji. None of these were reported felt in this remote region. The earthquake of M 5.9 in the Kermadec Islands occurred within minutes of local solar midnight and was probably promoted by strong tidal stresses at this hour. It is near the longitude of maximum tidal stress with the previous new moon and was probably also affected by this alignment. This summary had noted this possibility in previous issues as:

 

"The new  moon arrived on August 4, 2024 at 11:13 UT.  Longitudes which were at local solar noon at this time are located at about 15 East while those at local solar midnight are near 165 West. In the east these include most of western Europe and Iceland and the Atlantic Ridge while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/New Zealand and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this new 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 new  moon are considered  moderate to  high in the next week (August 1-10, 2024)." (August 3-9, 2024)

 

Forecasts 165277 and 165280 had expected a moderately large earthquake in  the Kermadec Islands within about 100 km of today's M 5.9 was likely in early August.

 

O: 09AUG2024 09:48:06  30.1S  177.3W mb=4.4  EMSC   KERMADEC ISLANDS, NEW ZEALAND

O: 09AUG2024 07:36:56  30.3S  177.4W mb=5.0  EMSC   KERMADEC ISLANDS, NEW ZEALAND

O: 09AUG2024 06:55:29  30.5S  177.5W mb=5.0  EMSC   KERMADEC ISLANDS, NEW ZEALAND

O:  9AUG2024 12:23:01  30.5S  177.6W MW=5.9  EMSC   KERMADEC ISLANDS, NEW ZEALAND

P:  6AUG2024 165277    30.0S  177.0W 4.0-5.5 AAAAA  No. Kermadec Islands       

P:  6AUG2024 165280    31.0S  177.0W 4.0-5.6 BAAAA  So. Kermadec Islands       

 

O: 10AUG2024 04:48:49  31.8S  179.1E ML=4.4  EMSC   KERMADEC ISLANDS REGION      

P: 10AUG2024 165276    35.0S  179.0E 3.0-4.4 ACAAA  North Island, N.Z.         

 

O: 10AUG2024 04:46:03  15.3S  177.7W MB=4.3  EMSC   FIJI REGION                  

P:  4AUG2024 165253    17.0S  178.0W 4.0-5.8 CBAAA  Tonga Islands              

P:  7AUG2024 165252    16.0S  175.0W 4.0-5.7 BACAA  Tonga Islands              

 

O:  9AUG2024 17:26:53  17.6S  172.9W MB=4.9  EMSC   TONGA REGION                 

P:  4AUG2024 165252    18.0S  173.0W 4.0-5.4 BAAAA  Tonga Islands              

P:  9AUG2024 165245    15.0S  173.0W 4.0-5.6 ACAAA  Samoa Islands              

 

O: 10AUG2024 07:09:44  20.8S  173.9W MB=4.9  EMSC   TONGA                        

P:  6AUG2024 165268    20.0S  175.0W 4.0-5.4 BAAAA  Tonga Islands              

 

O: 09AUG2024 09:35:38  21.9S  179.1W mb=4.8  EMSC   FIJI REGION

O: 09AUG2024 13:07:09  23.5S  179.8W mb=4.5  EMSC   SOUTH OF FIJI ISLANDS

O:  9AUG2024 11:10:47  21.7S  179.3W MW=5.6  EMSC   FIJI REGION                  

P:  6AUG2024 165268    22.0S  177.0W 4.0-5.7 BABAA  Tonga Islands              

 

O:  9AUG2024 20:35:19  23.7S  179.8W MB=4.6  EMSC   SOUTH OF FIJI ISLANDS        

P:  5AUG2024 165269    24.0S  180.0W 4.0-5.4 BAAAA  Tonga Islands              

 

 

 

 

AFTERSHOCKS CONTINUE IN MIYAZAKI, JAPAN - RELATED TO SOLAR FLARES

 

EARTHQUAKE SUMMARY FOR AUGUST 8, 2024

 

 

The strongest earthquake in the world today was an M 5.4 aftershock in the area  of Miyazaki, Kyushu, Japan. This follows the M 7.1 earlier in the day. This earthquake was reported by NEIC to have been felt lightly in Hamamatsu, Shizuoka, Japan. Full details of the Miyazaki earthquake earlier in the day are available in the previous issue of this summary. This earthquake may have been triggered by SFE from an X-class solar flare as it occurred near the peak of flare 980. This is the largest solar flare in at least a week although a similar sized flare occurred on August 5 (#9570). This flare was given the following parameters by SWPC:

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

 980       1901   1935      1957   X1.3      (August 8, 2024)   2.1E-01      

Kyushu M 5.4 19:23 UT

 

9570       1324   1340      1354   X1.7      (August 5, 2024)   1.9E-01  

El Salvador M 3.9 13:32 UT

 

This activity in Kyushu occurred as the first named Tropical Storm of the season was making landfall in SE Honshu, Japan (Maria) and was probably promoted by stresses associated with that storm.

 

"TS MARIA (TD 06W) continued south of Honshu, Japan today in the Izu Islands with winds up to 75 kts  It may affect seismicity in the Volcano, Bonin and Izu Islands and regions of mainland Japan in the next two days. A moderately large earthquake (other than the M 7.1 in Kyushu) is possible should this storm make landfall in SE Honshu, Japan." (August 9, 2024)

 

Internet photos showed collapsed houses in the town of Osaki, Kagoshima via Kyodo News indicating more damage from the M 7.1 than originally publicized. The first-ever advisory of increased risk of a mega quake on the Nankai Trough along the Japanese Pacific coast was issued today by JMA. This seems unlikely at this time with the size of current X-flares on the decline and effects from TS Maria already passed, but regional seismicity will remain high for several additional days in the view of this summary.

 

Forecast 165110 had expected enhanced seismicity in Kyushu was likely in  early August, 2024.

 

O: 08AUG2024 09:00:02  31.6N  131.6E mb=4.6  EMSC   KYUSHU, JAPAN

O: 08AUG2024 14:12:30  31.6N  131.9E ML=3.5  EMSC   KYUSHU, JAPAN

O: 08AUG2024 19:47:30  31.6N  131.9E ML=4.0  EMSC   KYUSHU, JAPAN

O: 08AUG2024 08:35:48  31.7N  131.6E mb=4.8  EMSC   KYUSHU, JAPAN

O: 08AUG2024 08:49:30  31.7N  131.9E ML=4.1  EMSC   KYUSHU, JAPAN

O: 08AUG2024 11:01:30  31.7N  131.9E ML=3.8  EMSC   KYUSHU, JAPAN

O: 08AUG2024 07:42:55  31.8N  131.4E Mw=7.1  EMSC   KYUSHU, JAPAN

O: 08AUG2024 18:48:53  31.8N  131.5E ML=4.2  EMSC   KYUSHU, JAPAN

O: 08AUG2024 19:23:31  31.9N  131.4E Mw=5.4  EMSC   KYUSHU, JAPAN

O:  8AUG2024 10:04:30  31.5N  131.9E ML=4.2  EMSC   KYUSHU, JAPAN                

P:  4AUG2024 165110    32.0N  132.0E 3.5-4.9 BAAAA  Kyushu, Japan area         

 

Aftershocks of the M 5.2-5.4 earthquake in Central California of August 7 also continued today. The largest of these (of M 2.8) was reported by NEIC to have been felt lightly in Bakersfield, Tehachapi and Culver City, California with intensity II-III. Forecast 165137 had expected this activity was likely around August 10 within about 15 km of these epicenters.

 

O: 08AUG2024 17:30:52  35.1N  119.1W ML=2.8  EMSC   CENTRAL CALIFORNIA

P: 10AUG2024 165137    34.9N  119.0W 2.5-4.6 AAAAA  So. California             

 

 

An eruption of White Island in New Zealand occurred today. This minor eruption occurred nearly five years after s stronger eruption in 2019 killed 22 tourists on a cruise ship. The enhanced volcanism at this time coincides with  very strong and active sunspot activity with the Wolf Sunspot number today at 337 and 10.7 Radio at 336, both more than 60 above the previous high in the past month.

These can indicate enhanced influence on global seismicity in sensitive areas and at high latitudes and near the geomagnetic equator in the next couple of days.

 

The strongest earthquake in the U.S. or Canada today was an M 4.5 in the

Rat Islands, Alaska. The last earthquake in the Rat Islands of larger magnitude was an M 4.9 on April 27, 2024. Forecasts 165213 and 165214 had expected enhanced seismicity in the Rat Islands in early August.

 

O:  8AUG2024 20:50:51  51.9N  177.9E MB=4.5  EMSC   RAT ISLANDS, ALEUTIAN ISLANDS

P:  4AUG2024 165213    50.0N  178.0E 4.0-5.7 BAAAA  Rat Islands                

P:  9AUG2024 165214    51.0N  176.0E 4.0-5.7 AAAAA  Rat Islands                

 

 

MAJOR EARTHQUAKE IN KYUSHU, JAPAN TRIGGERS TSUNAMI ALERT

 

EARTHQUAKE SUMMARY FOR AUGUST 7, 2024

 

 

The strongest earthquake in the world today was an M 7.1 in Kyushu, Japan in the region south of Miyazaki. It caused some damage to windows at the Miyazaki  airport. NEIC reported it was felt with intensity up to VIII in Japan at Miyazaki and IV in Hiroshima, Kagoshima, Saga, and VI in Saiki, Oita, and as far as South Korea, Shizuoka, Kanagawa and Tokyo, Japan. A tsunami warning was issued for tsunami waves up to 1.4 meters in Kyushu. EMSC reported moderate shaking in Fukuoka at Hakata and in Shanghai, China. Nuclear Power plants were being checked for damage. This is the strongest earthquake in Kyushu, Japan within about 250 km in at least 35 years. Earthquakes of M 7.0 hit the area on October 19, 1996 and on April 15, 2016. At that time this summary noted:

 

"A major earthquake of M 7.0-7.3 (JMA gives M 7.1) hit the region of Kyushu, Japan today. Foreshocks of M 6.0 and 6.2 hit the area on April 13. This occurred about two hours after the strongest solar flare in nearly two months which occurred while Kyushu was near solar midnight, prime time for Solar Flare triggering of seismicity. Today's earthquake caused more damage and a large landslide which destroyed a road and caused many houses to collapse. The full extent of the damage is not yet known however. Rescue work is being hampered by a strong rain and wind event which may have helped trigger several destructive landslides and may trigger further mudslides. At least 32 have been killed in this series of earthquakes - 10 in the first and 22 in today's event - and nearly 1500 injured. Power and water was disrupted to thousands. An estimated 200,000 were without electricity and 400,000 without drinkable water. Current tolls include 184 seriously injured, 91,000 evacuated or without homes and 200 homes destroyed or damaged beyond use. A massive rescue effort is now underway to free many trapped beneath collapsed structures. At least 97 people are known to be trapped or buried under collapsed buildings. NEIC reported intensity VIII in Kumamoto and V in Fukuoka, Nogata, and IV in Saga, Nagasaki, Oita, Miyakonogo, Miyazaki, Kagoshima, Hiroshima, Hyogo, Osaka, and in general within about 500 km of the epicenter. Intensity II-III was reported from about 500-1000 km from the epicenter. A number of aftershocks have been felt following the M 7.0 today including an M 5.8 and 5.9. At least one of these was felt in South Korea at Daejeon, Taejon and at Pusan. These were felt with intensity VI in Kumamoto and lesser intensity in Kagoshima, Kyoto, Miyazaki, Okayama, Nagasaki, Yamaguchi, Fukuoka, Oita and Fukuoka. JMA gave maximum intensity (JMA scale) VI+ in Kumamoto, VI- in Oita, V+ in Saga, Nagasaki, Miyazaki, V- in Ehime, and Kagoshima, IV in Tottori, Shimane, Hiroshima, Kochi, Yamaguchi, III in Osaka, Hyogo, Tottori, Tokushima, Kagawa, Japan.

 

The strongest solar flare in the past two months - a C4.8 flare – occurred about two hours before the earthquake of M 7.0 in Kyushu." (April 15, 2016)

 

Today's earthquake in Kyushu follows the strong geomagnetic storm of August 5 a pair of X-class flares (9570 and 9600) which occurred on August 5 while Kyushu was near local solar midnight and which may have helped trigger the volcanic eruption in Sakurajima and the subsequent M 7.1 in Miyazaki today. A second factor involved in the timing of today's activity may be Tropical Storm Maria which made landfall in southeastern Japan in the Bonin and Volcano Islands today. This is the first tropical cyclone to make landfall in Japan in the current Typhoon season and is likely to have more influence on regional seismicity than later storms of the same size.

 

Today's event follows a strong eruption of Sakurajima volcano in Kyushu yesterday as noted in the previous issue of this summary:

 

 

"Sakurajima Volcano in Japan erupted in a spectacular display today. Ash was lifted up to 10,000 feet and lava flows were witnessed. Sakurajima is Japan's largest volcano." (August 6-7, 2024)

 

Sakurajima Volcano is located at 31.5N 130.7E according to the Smithsonian Volcano Catalog.

 

Forecast 165110 had expected enhanced seismicity within about 50 km of the M 7.1 epicenter was likely in early August, 2024.

 

O: 08AUG2024 07:42:55  31.7N  131.5E mw=7.1  ANSS   NE of Nichinan Japan

O:  8AUG2024 07:42:57  31.8N  131.5E MW=7.1  EMSC   KYUSHU, JAPAN                

P:  4AUG2024 165110    32.0N  132.0E 3.5-4.9 BAAAA  Kyushu, Japan area         

 

Aftershocks also continued today in the Bakersfield area of Central California following the M 5.2-5.4 there on August 7 (see previous issue of this summary for details). Today's activity included an earthquake of M 4.4, an M 4.0 and two of M 3.8.  NEIC reported these were felt with intensity up to V in Grapevine, Bakersfield, Frazier Park, Lamont, Arvin, Taft, Maricopa, Fellows, Shafter, Keene, Lebec and as far as Los Angeles, San Jose and Fresno with intensity II. California. Following is a listing of events in this aftershock sequence of M>=3 which occurred today. A more detailed listing of events of M>=2 can be found in the  "CALIFORNIA" Section of this summary.

 

Forecast 165137 had expected a moderate earthquake within about 15 km  of this activity was likely around August 10, 2024

 

O: 07AUG2024 18:05:48  35.0N  119.1W ML=3.1  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 10:13:34  35.1N  119.1W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 10:39:19  35.1N  119.1W Mw=3.8  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 12:34:03  35.1N  119.1W ML=3.2  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 14:01:07  35.1N  119.1W ML=3.3  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 19:08:22  35.1N  119.1W ML=3.1  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 22:16:58  35.1N  119.1W ML=3.2  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 23:43:32  35.1N  119.1W Mw=3.8  EMSC   CENTRAL CALIFORNIA

O: 08AUG2024 00:32:01  35.1N  119.1W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 08AUG2024 01:27:22  35.1N  119.1W ML=3.2  EMSC   CENTRAL CALIFORNIA

O: 08AUG2024 02:09:16  35.1N  119.1W Mw=4.4  EMSC   CENTRAL CALIFORNIA

O: 08AUG2024 02:22:55  35.1N  119.1W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 07:11:21  35.2N  119.3W Mw=4.0  EMSC   CENTRAL CALIFORNIA

P: 10AUG2024 165137    34.9N  119.0W 2.5-4.6 AAAAA  So. California             

 

MODERATE EARTHQUAKES AND AFTERSHOCKS SHAKE SOUTHERN/CENTRAL CALIFORNIA

 

EARTHQUAKE SUMMARY FOR AUGUST 6, 2024

 

 

A moderately strong earthquake of M 5.2-5.7 occurred north of Los Angeles, California today in the Bakersfield area. NEIC reported intensity up to VII for this event with V in Bakersfield, Frazier Park; IV in Lamont, Arvin, Taft, Maricopa (VI), Shafter, Keene, Lebec, Tahachapi, Sosamond, McFarland, Caliente, Wasco, Ojai, Lake Hugues, New Cuyama, Castaic, Delano, Lancaster, Los Angeles and as far as Arizona, Oregon, Utah, Sonora, Mexico, and Washington State. Minor damage was reported by the press with this earthquake. This included some road damage and damage to merchandise in stores but no casualties were reported. Early warning electronic systems alerted some people several seconds before the shaking began. A strong series of aftershocks followed including an M 4.5 about a minute after the mainshock which was felt with intensity up to VI. This epicenter in California is at 104 degrees from the M 6.8 in Mindanao, Philippines of August 2, 2024 and may have been promoted by energy from that source.

 

The last earthquake in southern or central California within about 100 km of today's epicenter with M>=5.2 occurred on January 17, 1994 with M 6.7 and is referred to as the "Northridge Earthquake". On January 1 and January 5, 2024 this summary referred to the possibility of strong seismic enhancement in southern California this year as:

 

The strongest earthquake in the U.S. or Canada today was an M 4.2-4.4 in the region of eastern Los Angeles, California. NEIC reported this earthquake of M 4.2 in Los Angeles, California was felt with intensity up to V in the area(s) of Los Angeles, California in Lytle Creek.  EMSC reported moderate to strong shaking in the region of Los Angeles was felt in Fontana, Phelan, Rancho Cucamonga, Pinon Hills, Muscoy, Rialto, Crestline, Upland, Bloomington, Hesperia, Rialto, San Bernardino, Colton, Mountain View Acres, Glen Avon, Lake Arrowhead, Ontario, Glen Avon, Montclair, Highland and as far as Hollywood, Torrance nearly 100 km from the epicenter. This event follows a similar M 4.2 in the Rancho Palos Verdes area of California. This was noted in this summary on January 1, 2024 as:

 

"The strongest earthquake in the U.S. or Canada today was an M 4.1 in southern California south of Los Angeles. NEIC reported it was felt with intensity III in Rancho Palos Verdes, California. EMSC reported moderate to strong shaking without damage in California at San Pedro, Rancho Palos Verdes, Rolling Hills, Long Beach, Lomita, Seal Beach, West Carson, Signal Hill, Torrance, Rossmoor, Huntington Beach, Redondo Beach, Fountain Valley, Compton, Costa Mesa, Hawaiian Gardens, Westminster, Hermosa Beach among others. The only earthquakes with equal or larger magnitude than M 4.1  located within about 50 km of this epicenter in the past 35 years occurred on September 18, 2021 (M 4.3) and as an M 4.0 on May 15, 2013. At that time this summary noted:

 

 

"This earthquake occurred at exactly 12:00 noon. The timing suggests an external trigger either related to solar/geomagnetic and/or to tidal effects and previously earthquake in this series have occurred with similar tidal relations. This is the strongest earthquake in the Los Angeles area since an M 4.1 on August 29, 2012 in eastern Los Angeles. It is also the largest in a series

of earthquakes in the region which began on April 27 with an M 3.2 with the last event on May 9 with M 2.9. These earlier events in the series occurred north of the present epicenter. This area had been expected to be active at this time as it lies at 103 degrees from the M 7.2 in Papua which occurred on April 6 ..." (May 15, 2013)

 

This was mirrored in the previous issues of this summary as:

 

"Strong earthquakes in the  region of Papua, Indonesia can precede enhanced seismicity in Southern California by about a month at a distance of 103 degrees on the earth's surface. A typical example was the M 8.1 in this area on January 10, 1971 followed by the M 6.7 San Fernando earthquake in Los Angeles of February 9, 1971. A similar example occurred in October, 1979 when the Superstition Hills quake in southern California followed a major quake in this area of New Guinea." (December 31, 2023, January 1, 2024)

 

On December 31, 2023 this summary noted the possibility of a significant  earthquake in Central California this year as:

 

 

"Another area which may be closing in on a strong or major earthquake is the region of Central California - specifically the San Francisco and/or San Jose region. This area saw its last strong to major earthquake in the "World Series"  earthquake of October 18, 1989 of M 7.1-7.3, an event that caused considerable damage and deaths in the area. This follows strong regional earthquakes which included an M 6.0 on September 5, 1955; an M 6.6 on July 1, 1911; an M 6.8 on October 21, 1868 and an M 6.8 on June 10, 1838 an M 6.0 on April 10, 1881; an M 5.9 on August 6, 1979 and an M 5.9 on January 24, 1980. These events are generally strongest at the 11-year solar period when the output of flares on the sun is maximized and often occur with a strong X-class flare. The last of these in 1989 was preceded by the M 6.0 in 1955 33-34 years earlier and the event of 1911 44 years before. A similar series occurred in the 1800's with an M 6.8 in 1836; an M 6.8 in 1868 after 32-33 years and the largest of M 7.2 in 1906 37-38 years later. While these are not precise in the 11- or 33-year cycle and other cycles can be cited, there is enough to give a suggestion of strong earthquakes in the region with a periodicity around 33-34 years atop a lesser 11-year period. It has now been 33-34 years since the M 7.3 in 1989 and this will peak in early 2024 with possible strong seismicity through the year. This does not guarantee a strong regional earthquake at this time but strong X-class flares at this time could precipitate such an event at this time." (December 31, 2023)

 

A foreshock of M 4.1 hit this region on June 24, 2024. A slightly smaller earthquake of M 5.1 occurred about 50 km south of this on August 20, 2023. At the time this summary noted:

 

 

"A moderate earthquake of M 5.1 occurred today in the region of Ojai, California west of Los Angeles. The mainshock was reported by NEIC to have been felt with intensity V in Southern California in Santa Paula, Oak View, Ventura, Ojai, Oxnard, Somis, Camarillo and as far as central and Northern California with intensity II-III. A series of light earthquakes including an M 3.7 and 3.9 were also felt in this series. In general they were felt with intensity VI in Santa Paula, Ojai, Ventura, V in Oak View and II-III in Oxnard, Somis and other communities. This activity occurred as Hurricane Hilary was making landfall east of Los Angeles and in southern California. Weather related activity such as this is common.

 

...

 

 

This series began near local solar noon and may have been promoted by tidal stresses which maximize near this hour. An M 3.4 shook this area to the north on August 17, 2023 with the new moon within minutes of local solar noon and was probably promoted by tidal stresses from the new moon of August 16  

...

 

 

The last earthquake in southern California within about 100 km of today's M 5.1  with equal or greater magnitude occurred on April 5, 2018 and as an M 5.1 on April 16, 2005 so this is a significant regional earthquake for southern California. The simultaneity of this event with Hurricane Hilary landfall in the area is not lost as this is a very unusual 100 year storm for the region. It is highly likely that the two are related by transfer of stress." (August 20, 2023)

 

As with this previous event, today's event was also closely associated with a Hurricane. Hurricane Debby hit and is still active in the region of Florida and the southeastern U.S. over the past two days. Debby is the first hurricane to make landfall in the U.S. in the current hurricane season. Such landfalls have often been associated with significant seismic enhancement in the Pacific-North American boundary as reported on many previous occasions in this summary and it is possible this could be a source of energy leading to today's M 5.2 in  Central California.

 

Today's event follows a moderate M 4.9 on July 30, 2024. At the time this summary noted:

 

"A moderate earthquake shook southern California today with M 4.9. NEIC and the press reported it was felt with intensity up to VI in Barstow and Los Angeles areas. EMSC reported moderate shaking with a rolling motion with earthquake noises in California at Fort Irwin, Helendale, Victorville, Apple Valley, Hesperia, Big Bear City, Adelanto, Cedar Glen, Yucca Valley, Pinon Hills, Edwards, Trona, Pinon Hills, Morongo Valley, San Bernardino, Searles Valley, Redlands, Yucaipa, Ridgecrest, California City, Loma Linda, Twentynine Palms, Beaumont, Fontana and as far as Bakersfield and Simi Valley more than 200 km from the epicenter. It occurred within minutes of local solar noon and was probably promoted by strong geomagnetic and tidal stresses which maximize near this hour. A number of smaller aftershocks were felt with light intensity in the Barstow area.  This is a remote area of southern California and no major damage was reported with this earthquake. Today's earthquake of M 4.9 is the strongest recorded in Southern California within about 100 km of today's epicenter since an M 5.1 on December 6, 2008." (July 30, 2024)

 

Today's earthquakes also follow the strongest geomagnetic storm in the past month. This was reported in the previous issue of this summary as:

 

 

"The AP index of 46 today represents the most disturbed the geomagnetic field has been since AP reached 59 on June 28, 2024. Strong geomagnetic storms such as this are often followed by strongly enhanced global seismicity including earthquakes exceeding M 6.0." (August 5, 2024)

 

 

Following is a listing of events of M>=3 in this sequence near Grapevine, California. A more complete listing of events of M>=2 is found under the "CALIFORNIA" section of this summary.

 

Forecast 165137  had expected today's event within about 15 km was likely around August 10, 2024.  This epicenter in California is at 104 degrees from the M 6.8 in Mindanao, Philippines of August 2, 2024 and may have  been promoted by energy from that source. It is also located at 102-104 degrees from other major events of recent origin  in Mindanao and from the M 7.0 in Southern Xinjiang, China of January 22, 2024 and may have been set up by energy from those sources.

 

O: 07AUG2024 04:10:44  35.1N  119.1W ml=4.5  ANSS   NW of Grapevine CA

O: 07AUG2024 04:09:56  35.1N  119.1W mw=5.2  ANSS   km SW of Lamont

O: 07AUG2024 04:10:44  35.1N  119.1W ML=4.8  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:12:12  35.1N  119.1W ML=3.5  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:13:16  35.1N  119.1W ML=3.2  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:13:59  35.1N  119.1W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:15:14  35.1N  119.0W ML=3.1  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:17:10  35.1N  119.1W ML=3.9  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:19:22  35.1N  119.1W ML=3.4  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:21:50  35.1N  119.1W ML=3.3  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:29:35  35.1N  119.1W ML=3.3  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:46:56  35.1N  119.1W ML=3.5  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:48:20  35.1N  119.1W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 04:52:20  35.1N  119.1W ML=3.0  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 05:34:22  35.1N  119.1W ML=3.2  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 06:37:32  35.1N  119.1W ML=3.1  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 06:52:28  35.1N  119.1W Mw=3.5  EMSC   CENTRAL CALIFORNIA

O: 07AUG2024 07:11:21  35.2N  119.3W Mw=4.0  EMSC   CENTRAL CALIFORNIA

O:  7AUG2024 04:09:57  35.1N  119.1W MW=5.4  EMSC   CENTRAL CALIFORNIA           

P: 10AUG2024 165137    34.9N  119.0W 2.5-4.6 BAAAA  So. California             

 

 

A regional foreshock of M 2.5 shook the Los Angeles area about two hours before the event in Bakersfield. This earthquake was reported by NEIC to have been felt with intensity II-III in California at Northridge, Canyon Country, Van Nuys, Azusa, Covina, Glendora, West Covina (IV), Walnut, Diamond Bar, Palmdale, Van Nuys, Northridge. Forecast 165134 had expected this activity within about 15 km was likely around August 3.

 

O: 06AUG2024 18:54:22  34.2N  117.4W ML=2.2  EMSC   GREATER LOS ANGELES AREA, CALIF.

O:  7AUG2024 00:16:24  34.1N  117.8W ML=2.5  EMSC   GREATER LOS ANGELES AREA, CALI

O:  6AUG2024 20:49:06  34.2N  117.4W ML=2.4  EMSC   GREATER LOS ANGELES AREA, CALI

P:  3AUG2024 165134    34.3N  117.5W 2.5-4.4 BAAAA  So. California             

 

An unusual earthquake of M 3.9 was also widely felt in Victoria, Australia today. NEIC reported intensity III-IV in Victoria, Australia at Bairnsdale, Healesville, Moe-Yallourn, Traralgon, Warragul, Sale, Benalla, Parkenham, Wangaratta, Cranbourne, Craigieburn, Melbourne, Shepparton-Mooroopna (V), Sunbury, Lakes Entrance, Wodonga and as far as New South Wales. The last earthquake in the Melbourne area of Southeastern Australia with M>=3.9 occurred on February 8, 2024. At the time this summary noted:

 

 

"An earthquake of M 4.5 was widely felt today in the Melbourne area of Australia in the in the Gippsland region of Victoria. The quake centered near Leongatha and was felt as far north as Sunbury in Melbourne and as far south as Wilson's Promontory National Park according to Geoscience Australia. This event occurred several hours after  the M 4.0 in Florida. Like the event in Florida, this event in Australia is located near 103 degrees (102 degrees) from the M 7.1 in Xinjiang, China of January 22, 2024 and may have been promoted by energy from that source. The antipode of this epicenter is in the North Atlantic near the Azores, an active seismic area.

 

The last earthquake of M>=4.5 within about 200 km of this epicenter in Australia was an M 4.6 on July 20, 2012 - an aftershock of an M 5.4 on June 19, 2012. At the time this summary noted:

 

"NEIC reported an earthquake of M 4.5 in Victoria, Australia was felt with intensity IV in Moe-Uallourn, Morwell, Wodonga, Victoria and in Canberra, the Capital of Australia. It was also felt in Victoria with intensity II-III in the area(s) of Ararat, Bendigo, Craigieburn, Cranbourne, Crib Point, Echuca-Moama, Hastings, Healesville, Melbourne, Pakenham, Somerville, Sunbury, Traralgon, Warragul and Wonthaggi. Local news reported it is the strongest aftershock of the M 5.4 which hit the area a month ago on June 16 and was felt as far away as Melbourne several hundred km from the epicenter. In towns near Moe objects moved, and pictures, glassware and other unsecured objects fell. More than 200 aftershocks of the June event have been recorded." (July 20, 2012)

 

A small foreshock hit this area of Australia with M 3.3 on February 6, 2024 and was described at the time in this summary at the time as:

 

"An unusual earthquake of M 3.3 also lightly shock the area of Melbourne, Australia today. EMSC reported this earthquake of M 3.3 in SE Australia was felt with intensity up to III in the area(s) of SE Australia in Melbourne.

This epicenter is at 103 degrees from the Xinjiang, China earthquake of January 22, 2024, a distance at which a number of significant seismic events have been recorded since that time - including those of M 5.1 in Oklahoma and a series in Hawaii." (February 8, 2024)

 

Like the M 5.4 in California, this epicenter is also located at 100 degrees from the M 7.0 in Xinjiang, China of January 22, 2024 and may have been promoted by energy from that source.

 

O:  6AUG2024 17:48:43  37.5S  146.4E MB=3.9  EMSC   NEAR S.E. COAST OF AUSTRALIA 

 

Sakurajima Volcano in Japan erupted in a spectacular display today. Ash was lifted up to 10,000 feet and lava flows were witnessed. Sakurajima is Japan's largest volcano.

 

The strongest earthquake in the world today was an M 5.6 in the area south of

Fiji. It was not reported felt in this remote area. This is the strongest earthquake in the area South of Fiji since an M 5.7 on September 5, 2023. It was located at a longitude at which tidal stresses with the new moon of August

4 were expected to maximize as reported in previous issues of this summary:

 

"The new  moon arrived on August 4, 2024 at 11:13 UT.  Longitudes which were at local solar noon at this time are located at about 15 East while those at local solar midnight are near 165 West. In the east these include most of western Europe and Iceland and the Atlantic Ridge while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/New Zealand and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this new 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 new  moon are considered  moderate to  high in the next week (August 1-10, 2024)." (August 4-6, 2024)

 

Forecast 165269 had expected this event within about 150 km was likely  around August 9, 2024.

 

O: 06AUG2024 07:43:38  25.3S  178.4E mb=4.9  EMSC   SOUTH OF FIJI ISLANDS

O:  6AUG2024 21:22:47  24.5S  177.5W MW=5.6  EMSC   SOUTH OF FIJI ISLANDS        

P:  9AUG2024 165269    25.0S  176.0W 4.0-5.4 BABAA  Tonga Islands              

 

 

 

MODERATE EARTHQUAKE SHAKES EASTERN MEXICO; GUATEMALA

 

EARTHQUAKE SUMMARY FOR AUGUST 5, 2024

 

The strongest earthquake in the world today was an M 5.4 in Chiapas, Mexico. NEIC reported it was felt with intensity up to V in Francisco I. Madero, Mexico, and in Chiapas in San Critobal de las Casas, Tuxtla Gutierrez, in Tlalnepantla, Mexico; in Oaxaca at Mitla, Ozsaca, Santa Lucia del Camino, Xadani; in Citlaltepetl, Puebla and in Villahermosa, Tabasco. and in Veracruz at Tierra Blanca and Ixtaczoquitlan. EMSC reported moderate shaking in San Cristobal de Las Casas and Villahermosa, Mexico. This earthquake occurred near local solar noon at a latitude which was near sub-solar at the time of the earthquake and was probably promoted by strong tidal stresses which maximize near this hour.  The last earthquake in Chiapas within about 200 km of this epicenter with M>=5.4 occurred on October 7, 2023 with M 5.9. At the time this summary noted:

 

 

"A strong earthquake of M 5.9 was also felt in the region of eastern Mexico today. NEIC reported this earthquake of M 5.9 in Oaxaca Mexico  was felt with intensity II-III in the area(s) of  Mexico in Veracruz at Coatepec, in Mexico at Mexico City and Nezahualcoyotl and in Puebla, at Amozoc and Atzompa. This is the strongest earthquake within about 100 km in northern Oaxaca, Mexico since an M 6.1 on September 23, 2017." (October 7, 2023)

 

Forecast 165044 had expected today's enhanced seismicity in Chiapas was likely

around August 2, 2024.

 

O: 05AUG2024 19:56:38  14.5N   93.3W ML=4.3  EMSC   OFFSHORE CHIAPAS, MEXICO

O: 05AUG2024 20:35:25  14.5N   93.0W mb=4.8  EMSC   OFFSHORE CHIAPAS, MEXICO

O: 05AUG2024 16:49:49  14.8N   93.2W ML=4.2  EMSC   OFFSHORE CHIAPAS, MEXICO

O:  5AUG2024 19:02:59  16.9N   93.8W MW=5.4  EMSC   CHIAPAS, MEXICO              

P:  2AUG2024 165044    15.0N   93.0W 3.5-5.2 BBAAA  Chiapas, Mexico            

 

Aftershocks also continued in the Mindanao region of the Philippines today. The largest of these was an M 5.3.  NEIC reported this earthquake of M 5.3 in Mindanao, Philippines was felt with intensity up to IV in the area(s) of Mindanao, Philippines in Kinablangan and in Cateel, Southern Mindanao with III.

EMSC reported slight movement in Davao City, Philippines. The 103 degree distance where far field seismic triggering is likely following the M 6.8 on August 2 in Mindanao includes areas from Los Angeles through central and northern California - an area currently showing seismic instability. This could indicate a moderate to strong earthquake in this area in the next several days.

 

Forecasts 165006 and 165012 had expected this area of Mindanao was likely to see enhanced seismicity in early August.

 

O: 05AUG2024 15:19:42   8.0N  127.2E ML=4.0  EMSC   PHILIPPINE ISLANDS REGION

O: 05AUG2024 22:05:39   8.0N  126.9E ML=4.2  EMSC   MINDANAO, PHILIPPINES

O:  6AUG2024 05:39:27   7.8N  127.1E MB=5.3  EMSC   PHILIPPINE ISLANDS REGION    

P:  2AUG2024 165012     6.0N  127.0E 4.0-5.5 BBAAA  Halmahera                  

P: 10AUG2024 165006     7.0N  126.0E 4.0-5.5 BAAAA  Central Philippines        

 

 

An earthquake of M 4.4-5.3 occurred in the Cook Strait of New Zealand today. EMSC reported this earthquake of M 4.4 in Cook Strait, New Zealand was felt with intensity up to IV in the area(s) of Cook Strait, New Zealand in Wellington and as a gentle wobble in Upper Hutt.  GEONET reported this earthquake was felt with moderate to strong intensity in the area southeast of Picton, New Zealand and in southern North Island and northern South Island. 17148 reports of felt events were made of which 2958 reported weak and 8845 light intensity with 4758 report of moderate shaking and 534 with strong and 23 severe and 29 with extreme intensity came from the area. This is first event of M>=5.3 in the Cook Strait area of New Zealand within about 200 km of this epicenter since an M 5.4 on April 25, 2023. Today's event occurred near local solar midnight at a longitude which  was expected to see enhanced seismicity with the new moon as reported in previous issues of this summary:

 

"The new  moon arrived on August 4, 2024 at 11:13 UT.  Longitudes which were at local solar noon at this time are located at about 15 East while those at local solar midnight are near 165 West. In the east these include most of western Europe and Iceland and the Atlantic Ridge while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/New Zealand and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this new 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 new  moon are considered  moderate to  high in the next week." (August 5, 2024)

 

Forecast 165284 had expected this earthquake within about 50 km was likely around August 4, 2024.

 

O: 05AUG2024 11:38:37  41.4S  174.6E MS=5.3  GEONET Cook Strait, New Zealand

O:  5AUG2024 11:38:36  41.5S  174.7E MB=4.4  EMSC   COOK STRAIT, NEW ZEALAND     

P:  4AUG2024 165284    41.0S  175.0E 3.0-5.0 AAAAA  So. Island, N.Z.           

 

An unusual earthquake of M 3.5 also occurred in eastern Brazil today in the area near Minas Gerais. The last earthquake located within about 200 km of this epicenter with M>=3.5 in Brazil occurred as an M 4.3 on June 18, 2024. The only other such earthquake in the area in the past 35 years was an M 4.1 on May 22, 1998. At the time of the June, 2024 earthquake this summary noted:

 

"An unusual earthquake of M 4.3 also occurred today in the region of Sao Paulo, Brazil. It was followed by a minor aftershock of M 3.2. This area is near the Southern Atlantic geomagnetic anomaly and follows several strong earthquakes in that region on June 14, 2024, two of which were of M 5.9. Like those earthquakes, today's activity in Brazil was also closely associated with a solar flare - #3100 via SWPC. Data on that flare follows:

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

3100       1317   1325      1330   C3.0      (June 18, 2024)   2.2E-03  

Sao Paulo, Brazil M 3.2 13:19 UT

 

This earthquake of M 4.3 is the strongest earthquake within 400 km of this Brazilian epicenter in more than 35 years. An M 4.1 hit north of this on May 22, 1998. This epicenter is near the antipode of the M 7.4 in Taiwan of April 2, 2024 and may have been promoted by antipodal triggering from that event - the last major earthquake in the world." (June 18, 2024)

 

 

This earthquake occurred within minutes of local solar noon and may have been promoted by tidal stresses which maximize near this hour. This epicenter is near the antipode of the M 6.8 in Mindanao, Philippines of August 2, 2024 and may have been promoted by antipodal focusing of  energy from that source which has see active far-field triggering of seismicity in the past several days - which is expected to continue as noted in the previous issue of this summary:

 

"The 103 degree distance from the M 6.8 in Mindanao, Philippines of August 2 passes through much of California and north into Idaho. An M 3.4 occurred in Idaho at this distance from Mindanao today and was followed by a series of aftershocks." (August 5, 2024)

 

O:  5AUG2024 14:44:07  20.0S   48.8W MR=3.5  EMSC   MINAS GERAIS, BRAZIL         

 

The strongest earthquake in the U.S. or Canada today was an M 4.0 west of Queen Charlotte Island, Canada. It was not reported felt in this remote area. This event occurred within minutes of local solar noon and was probably promoted by strong tidal stresses and/or geomagnetic stresses which maximize near this hour. This is an unusual epicenter for a moderate earthquake. The last earthquake within about 150 km of this epicenter occurred more than 35 years ago. In this

period three events of M>=3 have been recorded - an M 3.9 on July 9, 1991; an M 3.5 on June 27, 2004 and an M 3.3 on October 1, 2018. This joins a series of unusual earthquakes off the western coast of North America in the past several days and suggests that instability in the region in this area is high with the strong geomagnetic storm and that a stronger earthquake is likely in this area at this time.

 

Forecasts 165204 and 165216 had expected this earthquake in this area was

likely in early August.

 

O:  5AUG2024 21:47:49  54.5N  138.7W MB=4.0  EMSC   WEST OF QUEEN CHARLOTTE ISLAND

P:  4AUG2024 165204    55.0N  135.0W 3.0-5.2 AABAA  British Colombia           

P:  8AUG2024 165216    57.0N  138.0W 3.0-4.6 BCAAA  Southeast Alaska           

 

An earthquake of M 2.5 occurred today in eastern Tennessee. This earthquake occurred as the remnants of Hurricane Debby passed through the area and may have been promoted by stresses related to this storm. In previous issues of this summary possible future seismicity with Hurricane Debby was expected as:

 

"TS DEBBY continued today near the Georgia-South Carolina border with winds up to 45 kts after making landfall in Florida today as a Category 1 Hurricane.  This system is expected to track to the east and north over the next several days passing along the coast of Georgia and South Carolina as a Tropical Storm. Little seismic enhancement in the region is expected with this storm but some enhancement may be seen in Georgia, South Carolina and North Carolina among currently active seismic areas." (August 5, 2024)

 

NEIC reported this earthquake of M 2.5 in Tennessee was felt with intensity up to IV in the area(s) of Tennessee in Sevierville, Seymour, Gatlinburg, Greeneville, Crossville, Cleveland, Bristol, and in Charlotte, North Carolina.

 

Forecast 165109 had expected this event within about 100 km was likely around August 3.

 

O:  5AUG2024 14:12:13  35.8N   83.5W MD=2.5  EMSC   EASTERN TENNESSEE            

P:  3AUG2024 165109    37.0N   83.0W 2.0-4.1 ABAAA  Kentucky/Tennessee/NC      

 

 

 

 

 

SEISMICITY FOLLOWS NEW MOON

 

EARTHQUAKE SUMMARY FOR AUGUST  4, 2024

 

It was quiet again today in global seismicity. The largest earthquake of the day was an M 5.4 in the South Sandwich Islands. This occurred near local solar midnight and shortly after a strong GRB occurred (see discussion below). An unusual M 2.2 also occurred today with a GRB off the coast of Central and Northern California and was also probably promoted by tidal and/or GRB effects. The geomagnetic disturbance reached levels above AP 40 for the first time in over a month. This strong geomagnetic storm is likely to bring auroral displays tonight and enhanced seismicity in areas at high latitudes and near the geomagnetic equator in the next several days. This summary had noted the likely response of the earth to this new moon was likely as:

 

"The new  moon will arrive on August 4, 2024 at 11:13 UT.  Longitudes which are at local solar noon at this time are located at about 15 East while those at local solar midnight are near 165 West. In the east these include most of western Europe and Iceland and the Atlantic Ridge while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/New Zealand and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this new 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 new  moon are considered  moderate to  high in the next week (July 1-10, 2024)." (July 27, 2024)

 

The earthquake in the South Sandwich Islands of M 5.4 was not reported felt in this remote area. This event is the strongest in the South Sandwich Islands within about 200 km of this epicenter since an M 5.7 on June 19, 2024. Today's event occurred within minutes of local solar midnight and was probably promoted by tidal and geomagnetic effects which maximize near this hour.

 

 

Forecast 165287 had expected today's event was likely around August 7 within

about 50 km.

 

O:  5AUG2024 02:29:46  56.2S   27.8W MB=5.4  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7AUG2024 165287    56.0S   27.0W 4.0-5.8 AAAAA  So. Sandwich Islands       

 

The AP index of 46 today represents the most disturbed the geomagnetic field has been since AP reached 59 on June 28, 2024. Strong geomagnetic storms such as this are often followed by strongly enhanced global seismicity including earthquakes exceeding M 6.0.

 

An unusual earthquake of M 4.4 occurred today off the east coast of north Island, New Zealand. NEIC reported this earthquake of M 4.4 in North Island, New Zealand was felt with intensity up to IV in the area(s) of North Island, New Zealand in Gisborne. New Zealand. It occurred near local solar noon in an area where tidal stresses with the new moon were especially prominent and may have been triggered by these stresses. The last earthquake with M>=4.4 within about 100 km of today's epicenter was an M 4.7 on October 12, 2023 

 

Forecast 165278 had expected regional seismic enhancement near North Island

around August 3.

 

O:  4AUG2024 23:08:54  39.0S  179.6E MB=4.4  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  3AUG2024 165278    39.0S  176.0E 3.0-4.5 AACAA  North Island, N.Z.         

 

A pair of light earthquakes of M 3.6 and 3.7 accompanied the landfall of a tropical cyclone in the Leeward Islands today in Antigua and Barbuda. This forecast noted these as:

 

"A tropical cyclone may be forming over the Windward and Leeward Islands. This system is currently at 16N 61W and moving into the western Caribbean Sea and southern Gulf of Mexico. Two earthquakes in Barbuda of M 3.6 and M 3.8 occurred today as this system made landfall in that area and were likely triggered by the landfall event" (August 5, 2024).

 

Forecast 165051 had expected this activity in the Leeward Islands was likely

around August 3.

 

O: 04AUG2024 15:52:47  17.6N   61.6W ML=3.6  EMSC   ANTIGUA AND BARBUDA REGION

O:  4AUG2024 18:04:21  17.6N   61.7W ML=3.7  EMSC   ANTIGUA AND BARBUDA REGION   

P:  3AUG2024 165051    16.0N   61.0W 3.0-4.9 ABAAA  Leeward Islands            

 

The 103 degree distance from the M 6.8 in Mindanao, Philippines of August 2 passes through much of California and north into Idaho. An M 3.4 occurred in Idaho at this distance from Mindanao today and was followed by a series of aftershocks. This is the strongest aftershock of the M 6.5 of March 31, 2020 since an M 3.5 on November 1, 2023. NEIC reported this earthquake of M 3.5 in Southern Idaho was felt with intensity up to IV in the area(s) of Southern Idaho at Smiths Ferry, Moscow and Cascade.

 

Forecast 165171 had expected this event was likely within about 15 km around

August 5.

 

O: 04AUG2024 09:49:03  44.3N  115.2W ML=2.3  EMSC   SOUTHERN IDAHO

O: 04AUG2024 14:27:13  44.3N  115.1W ML=2.4  EMSC   SOUTHERN IDAHO

O: 04AUG2024 16:10:05  44.3N  115.2W ML=2.4  EMSC   SOUTHERN IDAHO

O: 04AUG2024 21:30:37  44.3N  115.2W ML=3.4  EMSC   SOUTHERN IDAHO

O: 04AUG2024 21:30:37  44.3N  115.2W ML=3.5  ANSS   SOUTHERN IDAHO

O:  4AUG2024 09:33:59  44.3N  115.2W ML=2.2  EMSC   SOUTHERN IDAHO               

P:  5AUG2024 165171    44.4N  115.1W 2.0-4.2 AAAAA  Montana/Idaho              

 

 

MODERATE QUAKES SHAKE WESTERN TEXAS

 

EARTHQUAKE SUMMARY FOR JULY 26, 2024

 

 

The strongest earthquake in the U.S. or Canada today was an M 5.1 in western Texas. NEIC reported it was felt with intensity up to VI in the area of Hermleigh, Texas. EMSC reported strong shaking in western Texas at Snyder, Colorado City, Rule, Hawley, Lubbock, San Angelo, Midland, Ranger, Odessa, Mullin, Weatherford, Bowie, Hastings, Amarillo, Arlington among others.

NEIC reported an aftershock  of M 2.9 in Western Texas was felt with intensity up to IV in the area(s) of Western Texas in Hermleigh. Other earthquakes of M 2.5-3.5 were also felt today in the Hermleigh, Texas area with intensity up to V. Today's activity occurred during a strong geomagnetic storm, the strongest  since June 28, 2024 when AP reached 59 with high latitude AP at 36. The corresponding indicies with today's storm are 23 for planetary AP and 38 for high latitude.

 

An M 4.9 hit the same area on July 23, 2024. There has been only one other earthquake in western Texas of M>=5.1 in the past 35 years - an M 5.4 on December 16, 2022. At the time this summary noted:

 

 

"A moderate earthquake of M 5.4 was widely felt in Western Texas and New Mexico today. NEIC reported it was felt with intensity IV in Texas at Midland, Stanton, Gardendale, Odessa, Andrews,. Ackerly, Lamesa, Big Spring, Garden City, Seminole, Kermit, Midkiff, Crane, among others; in Ne Mexico with III-V in Jal, Hobbs, Lovington, and as far as Houston, Texas, Los Alamos, New Mexico, Oklahoma City, Oklahoma, Colorado Springs, Colorado, Camden, Arkensas, Missouri, Kansas, Nebraska and Illinois. This is the largest shock in this area of continuing seismicity since the area became active. It is also among the top five earthquakes ever recorded in the State of Texas. No major damage was reported. This epicenter is in the active oil extraction and fracking area of Texas and may have been artificially induced. The epicenter is not at the same locations which have recently seen sizable increases in seismicity but appears to be midway between them and represents a new area to add to the several active regions of western Texas. A number of light aftershocks were also reported felt.  An M 2.7 foreshock was felt lightly in Texas at Clint, Canutillo and Leander. In the previous issue of this summary it had been noted in this regard:

 

 

"The series of light to moderate earthquakes in western Texas also continued today. The largest of these events was an M 3.0. This area has seen nearly daily seismicity in the past several months included events up to M 5.3. These earthquakes are at 144 degrees from the M 6.9 in Sumatra of November 18 and  at 103 degrees from the M 7.0 in the Solomon Islands of November 22  and may have been promoted by energy from that source. Further moderate seismicity is expected to continue in this area. Another earthquake today at 144 degrees from Sumatra occurred in Coquimbo, Chile with M 4.2. Forecast 149059 had expected this activity around December 14." (December 15-16, 2022)

 

As noted above the epicenter of today's M 5.4 is more than 100 km east of the currently active regions of western Texas near 103.5W and 104.5W and represents a new area of seismic enhancement. The largest earthquake within about 100 km

 of today's epicenter in recent years included an M 4.0 on June 6, 2022 and an M 4.5 on December 28, 2021 -  the only such events of M>=3.5 in this area in the past 35 years. Earthquakes in Texas with M>=5.4 have historically been rare. The only such event recorded in this state of equal or larger magnitude were an M 5.6-6.4 on August 16, 1931; an M 5.5 on June 17, 1959 and an M 5.7 on April 14, 1995. The events in 1995 and 1931 occurred in the western Permian Basin near the current series prior to today while the event in 1959 was in northern Texas near the Oklahoma border." (December 16. 2022) Forecast 164854 had expected enhanced seismicity in western Texas was likely around July 23.

 

O: 26JUL2024 14:17:53  32.8N  100.7W ML=2.3  EMSC   WESTERN TEXAS

O: 26JUL2024 14:28:29  32.8N  100.7W Mw=4.8  EMSC   WESTERN TEXAS

O: 26JUL2024 14:28:29  32.8N  100.7W Mw=5.1  ANSS   WESTERN TEXAS

O: 26JUL2024 14:32:42  32.8N  100.7W ML=3.0  EMSC   WESTERN TEXAS

O: 26JUL2024 14:34:40  32.8N  100.7W ML=2.6  EMSC   WESTERN TEXAS

O: 26JUL2024 14:40:34  32.8N  100.7W ML=3.2  EMSC   WESTERN TEXAS

O: 26JUL2024 14:58:37  32.8N  100.7W ML=2.0  EMSC   WESTERN TEXAS

O: 26JUL2024 15:21:54  32.8N  100.7W ML=2.2  EMSC   WESTERN TEXAS

O: 26JUL2024 15:44:59  32.8N  100.7W ML=2.6  EMSC   WESTERN TEXAS

O: 26JUL2024 16:11:57  32.8N  100.7W ML=2.5  EMSC   WESTERN TEXAS

O: 26JUL2024 16:28:06  32.8N  100.7W ML=2.1  EMSC   WESTERN TEXAS

O: 26JUL2024 17:22:55  32.8N  100.7W ML=2.2  EMSC   WESTERN TEXAS

O: 26JUL2024 19:40:36  32.8N  100.7W ML=2.8  EMSC   WESTERN TEXAS

O: 26JUL2024 21:57:56  32.8N  100.6W ML=2.1  EMSC   WESTERN TEXAS                

P: 23JUL2024 164854    31.7N  103.0W 2.0-3.9 BBBAA  SW U.S.A                   

 

 

An unusually strong M 4.0 occurred in the region of Naples, Italy today in the Camp Flegrei region. This event was felt with moderate intensity in Naples, Vomero, Italy. This activity may be part of a series of earthquakes which have been interpreted as possible precursory to new volcanism in the area near Vesuvius. Forecast 164886 had expected enhanced seismicity in this region of Italy was likely around July 25.

 

O: 26JUL2024 11:46:21  40.8N   14.1E MD=4.0  EMSC   SOUTHERN ITALY               

P: 25JUL2024 164886    41.0N   15.0E 3.0-5.1 AAAAA  Italy                      

 

An M4.2 solar flare occurred early on July 27, 2024. This is one of the strongest solar flares in the past two weeks. This was accompanied by an M 4.4 in the Izu Islands, Japan at 02:45 UT - within minutes of local solar noon.  It is likely this earthquake in Japan was triggered by solar Flare Effects (SFE). Major X-class flares have occurred this week including an X16 but occurred on the side of the sun not facing earth and should have little immediate effect on the earth environment. The sunspots which produced these flares, however, will be rotating to a position that future such flares could cause effects on the earth next week. This summary will keep these under observation.

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

-------------------------------------------------------------------------

 

XXXX       0221   0237      0245   M4.2      (July 27, 2024)   3.0E-02  

Izu Islands, Japan M 4.4 02:45 UT

 

 

 

MODERATE EARTHQUAKES ALONG GEOMAGNETIC EQUATOR

 

EARTHQUAKE SUMMARY FOR JULY 12, 2024

 

A series of moderately large earthquakes occurred today near the geomagnetic equator. These were of M 5.5-5.6 in Chile, Bolivia and New Guinea and may reflect upcoming enhancement of seismicity in this zone with a strong geomagnetic storm beginning today through July 14, 2024.

 

The strongest earthquake in the world today was an M 5.6 in Southern Peru. NEIC

reported this event was felt with intensity up to IV in Tarata, Peru. EMSC reported moderate to strong shaking in Bolivia, Peru and Chile. The earthquake was felt with moderate shaking in Tacna, Peru, Arica with reports from Parinacota, Iquique, Alto Hospicio,  Chile, La Paz. Bolivia. While not a classical aftershock of the M 7.2 about 500 km northwest of today's epicenter, this event was probably promoted by stress redistribution following the June 28 mainshock and is a regional aftershock of that event.

 

The earthquake in Bolivia is the strongest reported in that country since an

M 6.3 on January 21, 2018. At the time this summary noted:

 

 

"A strong earthquake of M 6.3 hit the region of northern Chile near Tarapaca today. NEIC reported maximum intensity from this intermediate focus event was felt in Arica, Tarapaca, Chile with intensity IV in Iquique, Chile and Arequipa, Peru. Intensity II-III was reported from Moquegua, Peru; La Paz, Bolivia; and Antofagasta, Chile. CSN reported this earthquake was felt with intensity VII in  Arica, VI Cuya, Pocon Chile, Putre,; V Camina, Huara, La Tirana, Pisagua, Quillagua; IV Tocopilla, Pozo Almonte, Pica, Mamina, Iquique, Alto Hospicio, III Alcerreca, Viviri, Maria Elena; II Calama, Chungara-Complejo, Sierra Gorda. Felt in Parinacota, Tarapaca and Antofagasta, Chile. Due to the depth near 110 km no damage was reported on the surface and no tsunami was generated nor expected from this earthquake. An earthquake of M 6.3 also hit north of this epicenter by about 40 km on October 10, 2017. The last event in the region of larger magnitude was an M 8.2 about 100 km to the south on April 1, 2014 followed by

and M 7.6 on April 3, 2014." (January 21, 2018)

 

 

Forecast 164687 had expected today's epicenter would be active in Bolivia within about 50 km of today's epicenter around July 15.

 

O: 12JUL2024 18:19:04  17.4S   69.5W MW=5.6  EMSC   LA PAZ, BOLIVIA              

P: 15JUL2024 164687    18.0S   69.0W 4.0-5.5 BAAAA  So. Peru/Bolivia           

 

A true aftershock of that event also occurred today with M 5.6-5.7 earlier in the day. NEIC reported it was felt with intensity up to VI near Acari, Peru.

 

Forecast 164678 had expected enhanced aftershocks around July 11 in Peru.

 

O: 12JUL2024 09:30:32  15.6S   74.7W MW=5.7  EMSC   NEAR COAST OF SOUTHERN PERU  

O: 13JUL2024 03:35:41  15.9S   74.6W mb=4.6  EMSC   NEAR COAST OF SOUTHERN PERU

O: 12JUL2024 18:55:00  16.0S   74.8W mb=4.8  EMSC   NEAR COAST OF SOUTHERN PERU

P: 11JUL2024 164678    14.0S   76.0W 4.0-6.0 ABAAA  Central Peru               

 

A similar M 5.6 occurred today in the area of Papua New Guinea. NEIC reported it was felt with intensity up to V   in the area of Rabaul, PNG. The last earthquake of larger magnitude in the New Ireland region was an M 5.7 on May 18, 2024 and this may be an aftershock of that mainshock. At the time this summary noted:

 

 

"The largest earthquake in the world today was an M 5.7 in Papua New Guinea. NEIC reported it was felt with intensity up to V in Rabaul, New Guinea. This event occurred within minutes of local solar midnight and was probably promoted by tidal and geomagnetic stresses which maximize near this hour. This appears to be a regional aftershock of an M 5.4 on May 16, 2024. At the time this summary noted:

 

"As the geomagnetic storm reduced in intensity today, moderately enhanced seismicity began to appear along the geomagnetic equator. Most notably this occurred in New Guinea in the area of New Ireland with the strongest earthquake of the day and in eastern New Guinea with an M 5.2 three hours earlier. This is the type of seismicity which can be expected several days following major geomagnetic storms. The M 5.4 in New Ireland since an M 5.5 on November 18, 2023 - an aftershock of an M 5.9 and M 6.1 on November, 12 and 13, 2023." (May 16, 2024, May 19, 2024)

 

Forecast 164477 had expected enhanced seismicity within about 150 km of this epicenter was likely around July 13.

 

O: 12JUL2024 17:12:48   3.8S  151.4E MW=5.6  EMSC   NEW IRELAND REGION, P.N.G.   

P: 13JUL2024 164477     5.0S  152.0E 4.0-5.4 ABAAA  New Britain                

 

The strongest earthquake in the U.S. or Canada today was an M 4.8 aftershock of the M 6.4 near Vancouver Island yesterday. Today's event was reported by NEIC to have been felt with intensity up to III in Tofino, Canada. Previous issues of this summary have noted this swarm in detail. Readers are referred to the past three issues for more details.

 

Forecast 164642 had expected today's activity was likely within about 25 km around July 12, 2024.

 

O: 12JUL2024 08:20:28  48.9N  128.7W MB=4.6  ECAN OF PORT HARDY, BC  

O: 12JUL2024 08:20:31  49.0N  128.4W MW=4.8  EMSC   VANCOUVER ISLAND, CANADA REGIO

P: 12JUL2024 164642    48.7N  129.0W 2.8-5.1 AAAAA  Vancouver Island area      

 

 

An earthquake of M 4.6 also occurred in the Unimak Island region of Alaska today. It was not reported felt in this remote area. The last earthquake of larger magnitude in the Unimak Island area was an M 4.7 on May 23, 2024.

 

Forecast 164661 had expected today's event was likely within about 50 km  of today's epicenter around July 11.

 

O: 13JUL2024 01:57:51  53.5N  164.8W ML=3.6  EMSC   UNIMAK ISLAND REGION, ALASKA

O: 13JUL2024 02:28:52  53.5N  164.8W MB=4.6  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 11JUL2024 164661    54.1N  164.4W 3.5-4.9 AAAAA  Unimak Islands, Aleutians  

 

 

 

STRONG EARTHQUAKE RATTLES VANCOUVER ISLAND AREA, BRITISH COLUMBIA, CANADA

 

EARTHQUAKE SUMMARY FOR JULY 11, 2024

 

The strongest earthquake in the world today was an M 6.4 in the series in Vancouver Island, British Columbia which began July 4, 2024. NEIC reported it was lightly felt with moderate intensity up to IV in Tofino, Canada. EMSC reported light shaking in Chilliwack, Canada. Several moderate aftershocks – including an M 5.4 - were also felt in this region. This summary has extensively

covered this swarm in previous issues as in the last summary which noted:

 

 

"This epicenter (in Mindanao, Philippines) is near 100 degrees from the M 6.7 yesterday south of Africa and at the same distance from the continuing swarm of earthquakes in the Vancouver Island area of British Columbia, Canada. With an earthquake at this depth these areas are at the shadow zone boundary for S- and P-waves (normally 102-103 degrees distance for earthquakes that occur near the surface. Thus the event today in Mindanao is considered a triggered earthquake from the M 6.7 South of Africa yesterday. Further activity (perhaps) a strong earthquake in Vancouver is also likely at this time due to the concentration of energy from the area south of Africa. A further complication perhaps leading to additional  enhancement in Vancouver, B.C. is the track of Hurricane Beryl. The remnants Hurricane Beryl is now located over the northeastern U.S. where it has dropped large reserves of water over the past two days.  This summary has long been a proponent of the theory that effects of strong meteorological events  (nor'easters and hurricanes, for example) affecting the Northeast U.S.  can trigger strong earthquakes on the Pacific-North American plate boundary in particular from California north to Alaska. This was outlined in the previous issue of this summary as:

 

 

 

"Today's epicenter (south of Africa) is near the antipode of the Alaska Peninsula and the Unimak Island area of Alaska - an active region - where antipodal triggering possible following this earthquake in the next week. With a strong solar flare, this could reach strong magnitude levels. This possibility was emphasized when a light earthquake occurred two days ago in western South Dakota, often a precursor to a strong event along the North American- Pacific boundary." (July 9, 2024)

 

and

 

"The tidal effects will linger for several more days as the new moon arrives. Due to this, this series could intensify and possibly include a moderate to moderately large event in the next three days in the Vancouver Island area." (July 4-5, July 9, 2024)

 

and with additional tidal stresses with the upcoming full moon as:

 

"The full moon will arrive on July 21, 2024 at 10:17 UT.  Longitudes which are at local solar noon at this time are located near 30 East longitude while those at local solar midnight are near 150 West longitude. In the west these include  Hawaii and areas of eastern and southern Alaska and western Canada and to a lesser extent areas off the coast of Oregon and California while in the east they include Eastern Turkey and Greece and Romania  as well as Ethiopia and areas off southern Africa and eastern Europe. These and surrounding areas are the most likely to see tidally enhanced seismicity at this time. A large to major earthquake is considered moderately likely in the period July 17-25, 2024." (July 8, 2024, July 11, 2024)

 

Today's event of M 6.4 in the Vancouver Island area is the strongest within about 200 km of this epicenter since an M 6.5 and 6.8  on October 22, 2018. At the time this summary noted in this regard:

 

 

"A strong earthquake of M 6.6 hit off the southwest coast of Vancouver Island, British Columbia, Canada today. It was reported by Earthquakes Canada and NEIC to have been felt lightly in British Columbia at Port MacNeil, Ucluelet, Nanaimo, Sooke, Sidney, Victoria, Vancouver, and Whistler and in Washington State at Sequim and Hoquiam among others. Earthquakes Canada reported this earthquake of M 6.5 southwest of Vancouver Island, B.C, Canada  was felt with intensity II-III in the epicentral area. No tsunami was generated and no damage was expected. This epicenter is located at 103 degrees from the last major earthquake in the world - the M 7.6 in Minahasa, Indonesia which killed thousands in the earthquake and tsunami on September 28, 2018. This summary has long established that seismic energy from large earthquakes, concentrated by reflection and refraction off the core-mantle boundary and reflected to the surface near 103 degrees can promote further seismicity in this distance range. When the Minahasa event occurred this summary had noted at the time the relation between Minahasa and Vancouver Islands in the issue of October 2 as:

 

...

 

This epicenter is at 102 degrees from the Minahasa quake of M 7.5 of September 28 and probably was enhanced by concentrated seismic energy from that event." (October 2, 2018)

 

Another factor which probably encouraged the occurrence of the Vancouver event at this time was the massive Hurricane Willa which hit off the coast of western Mexico with winds up to 170 kts today. Strong hurricanes pushing North America to the east have often been cited in this summary as promoters of strong earthquakes in the Vancouver or Queen Charlotte Islands area of Canada. This summary had noted Hurricane Willa in previous summaries as:

 

"Hurricane Willa continued today south of Jalisco, Mexico with winds up to 170 kts. It is expected to track to the north making landfall around October 24 near Mazatlan, Mexico. Enhanced seismicity in the region is likely with landfall. The storm reached maximum as it hit the coast of Mexico today with winds up to 170 kts (category 5). Motions imparted to North America with this landfall reduced normal friction across faults near the North American rim and probably helped bring on the M 6.6 today in Vancouver, British Columbia." (October 20-21, 2018)

 

The region may have also been set up for strong seismicity at this time due to effects on North America from the landfall of Hurricane Michael. This had been noted in this summary as:

 

"Seismicity along the coast of California may be enhanced at this time as Hurricane Michael makes landfall on the Florida panhandle with winds up to 145 kts, the strongest storm ever to have hit this area. This will tend to push the North American plate to the northeast loosening the normal friction on Faults in the west." (October 9-10, October 13, 2018)

 

Today's earthquake of M 6.6 is the largest in the Vancouver Island area of Canada since an M 6.6 on April 24, 2014. Other such quakes occurred in the past 30 years with M6.5-6.6 on April 6, 1992; November 2, 2004 and January 5, 2008.

Forecast 120595 had expected today's event within about 100 km of the epicenter most likely to occur around October 21.

 

The last such event in Vancouver in April 2014 was also associated with a storm not unlike Hurricane Michael as noted at the time:

 

"a strong spring storm was racing up the Atlantic coast of the U.S. at the time of this earthquake in Vancouver. This is a situation very much like that which preceded the M 7.7 in the Queen Charlotte Islands in October, 2012 as Hurricane Sandy did massive damage to the central east coast of the U.S. This summary has documented this relation with strong storms and major earthquakes in the British Columbia region on many previous occasions." (April 24, 2014, October 22, 2018)

 

Forecast 164642 had expected today's activity near Vancouver within about 25 km was likely around July 12, 2024. This epicenter is at 98 degrees from the M 7.1 in Mindanao of July 11, 2024 and may have been promoted by energy from that source and other major earthquakes in Mindanao of recent months.

 

O: 11JUL2024 17:34:28  48.9N  128.5W Mw=4.7  EMSC   VANCOUVER ISLAND, CANADA REGION

O: 11JUL2024 16:17:26  49.0N  128.1W Mw=5.4  EMSC   VANCOUVER ISLAND, CANADA REGION

O: 12JUL2024 08:20:28  48.9N  128.7W MB=4.6  ECAN OF PORT HARDY, BC  

O: 11JUL2024 20:00:44  48.9N  128.6W MB=3.3  ECAN OF TOFINO, BC   

O: 11JUL2024 17:48:30  48.6N  128.7W MB=3.6  ECAN OF TOFINO, BC   

O: 11JUL2024 17:41:27  48.8N  128.6W MB=3.6  ECAN OF TOFINO, BC   

O: 11JUL2024 17:34:26  48.8N  128.7W MB=5.1  ECAN OF TOFINO, BC   

O: 11JUL2024 17:12:40  48.9N  128.5W MB=3.2  ECAN OF TOFINO, BC   

O: 11JUL2024 16:41:05  48.7N  128.7W MB=3.4  ECAN OF PORT HARDY, BC  

O: 11JUL2024 16:17:20  48.8N  128.6W MB=5.2  ECAN OF TOFINO, BC   

O: 11JUL2024 16:12:58  49.1N  128.3W MB=2.1  ECAN OF PORT ALICE, BC  

O: 11JUL2024 15:35:43  48.9N  128.7W MB=4.0  ECAN OF TOFINO, BC   

O: 11JUL2024 15:08:46  48.7N  128.8W MB=6.4  ECAN OF PORT HARDY, BC  

O: 11JUL2024 15:08:50  48.9N  128.5W MW=6.4  EMSC   VANCOUVER ISLAND, CANADA REGIO

P: 12JUL2024 164642    48.7N  129.0W 2.8-5.1 AAAAA  Vancouver Island area      

 

 

An M 5.4 was also felt in Guam, Mariana Islands today. NEIC reported it was felt with intensity up to IV in Guam at Merizo Village. This is the strongest earthquake in Guam since an M 5.5 on April 16, 2024.

 

Forecast 164522 had expected today's event in Guam was likely within about 100 km of this epicenter around July 12, 2024.

 

O: 11JUL2024 09:27:35  12.3N  144.1E MB=5.4  EMSC   GUAM REGION                  

P: 12JUL2024 164522    12.0N  145.0E 4.0-5.5 AAAAA  So. Marianas/Guam          

 

A moderately large M 5.8 also occurred in the central East Pacific Rise today. It was not reported felt in this remote area. It was followed by an M 4.6 aftershock. This is the strongest earthquake in the Central East Pacific Rise within about 250 km of today's epicenter  since an M 6.0 on September 20, 2023. At the time this summary noted:

 

 

"The largest earthquake in the world today was an M 6.0 in the northern East Pacific Rise south of Oaxaca, Mexico where was reported felt with intensity II. It was followed by a strong aftershock of M 5.7 and a moderate event of M 4.6 and preceded by an M 4.6 foreshock and an M 5.2 foreshock seconds before the mainshock. The last earthquake of M>=6 within about 200 km of today's epicenters occurred as an M 6.1 on March 22, 2020 and a similar event of M 6.0-6.1 on  September 11, 2013. The only event of M>=6.0-6.1 in the area in the past 35 years was an M 6.33 on August 15, 1997. At the time of the event of March 22, 2020, this summary noted:

 

"The strongest earthquakes in the world today were an M 6.1 in the Central East Pacific Rise and an M 5.6 in the Central Mid-Atlantic Ridge. Neither of these were reported felt in these remote areas. The event in the Central East Pacific Rise is the largest within about 250 km of that epicenter since an M 6.1 on September 11, 2013 and a similar M 6.1 on August 4, 2007. The maximum sized earthquakes in the region in the past 30 years have been about M 6.1." (March 22, 2020, September 20, 2023)

 

 

Forecast 164482 had expected today's event within about 50 km was likely

around July 13.

 

O: 12JUL2024 05:47:09   4.0S  104.5W MB=4.6  EMSC   CENTRAL EAST PACIFIC RISE    

O: 12JUL2024 00:19:44   4.5S  104.8W MW=5.8  EMSC   CENTRAL EAST PACIFIC RISE    

P: 13JUL2024 164482     5.0S  105.0W 4.0-5.7 AAAAA  No. East Pacific Rise