Because this summary is often behind schedule updates to the current date are being added here to make it more relavent to current conditions

April 28, 2024

The strongest earthquake in the world today wasa deep focus M 6.5 in the Bonin Islands, Japan.

NEIC reported light shaking at intensity II at the surface in the Bonin Islands.

This is the largest earthquake reported in the Bonin Islands within about 200

km of today's epicenter since an M 6.6 on April 18, 2020.

At the time of that event this summary noted:

"A strong M 6.6 earthquake shook the Bonin Islands of Japan today at a deep focus (490 km). It was reported felt in southern Honshu more than 1000 km from the epicenter with intensity II-III in Japan at Chiba, Kanagawa, Tokyo, and Saitama.

JMA reported it was felt in Tokyo and Ogasawara, Japan with intensity IV. No tsunami was expected or observed from this deep focus event. This is the strongest earthquake in the Bonin Islands since an M 7.8 on May 30, 2015

at a deep focus.

The occurrence of this strong earthquake today at 140 East longitude on the Pacific Rim is consistent

with promotion by tidal stresses associated with the full moon." (April 18, 2020)

A regional foreshock in the Bonin Islands of M 5.4 also occurred on April 24, 2024.

It was described in a previous issue of this summary as:

"A moderately strong earthquake of M 5.4 also occurred today in the Bonin Island

south of Honshu, Japan. It may have been lightly felt in the epicentral area.

The last event of M>=5.4 in the Bonin Islands within about 200 km of this

epicenter occurred as an M 5.9 on June 21, 2022. At the time this

summary noted:

"An earthquake of M 5.9 also occurred in the Bonin Islands of southern Japan today. It was not reported felt in this remote area.

This is the strongest earthquake within about 200 km of this epicenter since an M 7.4

on December 21, 2010 and aftershocks of M 6.2 and 6.4 on December 22, 2010.

More recent earthquakes in the area have occurred with M>=5.9 at deep focus

about 250 km to the west of today's event with M 6.0 on May 26, 2012; M 7.8 on May 30, 2015

and M 6.6 on May 18, 2020." (June 21, 2022, April 25, 2024))

The strongest earthquake Felt in the world today was an M 6.1 south of Sumatra in the region of Indonesia. NEIC reported it was felt with intensity up to VIII in Banjar, Indonesia.

A foreshock of M 4.7 occurred earlier in the day and was reported felt with intensity

up to III in Labuan, Indonesia. BMG gave this event M 6.5 and reported intensity IV in Sukabumi at Lengkong, Waluran, Surade, Cibitung, Ciracap, Kebonpedes, Cireunghas, Pabuaran, Purabaya, Sagaranten, Curugklenbar, Cidolog, Cidadap, Cimanggu and in Kab Cianjur, Bandung, Garut, Tasikmalaya, Ciamis, Cirebon, Subang, Purwakarta, Bekasi, Bandung, Pangandaram, Sukabumi, BTasikmalaa, Nganjuk Pandeglang, Serang and Buleleng and III in Kab Aceh Besar, Lampung, Pesawarn among others.

The last earthquake of M>=6.1 within about 200 km of today's epicenter south of

Sumatra occurred on January 14, 2022 with M 6.6 and before that as an M 6.9 on August 2, 2019.

At the time of the January 14, 2022 event this summary noted:

"The full moon arrives January 17 and is likely to trigger a strong to major earthquake either in the Tonga-Fiji area or in the Aleutians

as described in this summary

...

The full moon will arrive on January 17, 2022 at 23:49 UT. Longitudes which are at local solar noon at this time are near 180E/W longitude while those at local solar midnight are near 0E/W. These are the most likely longitudes to see tidal triggering during the next week and include area of western Europe in the east and the Aleutians and Tonga/Fiji/New Zealand in the west. A strong earthquake appears likely in one or more of these areas between January 13 an 22." (January 12-14, 2022)

...

Aftershocks of the M 6.6 in the Sunda Strait today were felt with light intensity in the neighborhood of Pondok Aren, Banten, Indonesia.

An M 5.4 aftershock was felt lightly in Rangkasbitung, Depok, Jakarta, and Olamis, Java, Indonesia.

This summary noted the mainshock in the previous issue of this summary as:

"The strongest earthquake in the world today was an M 6.6 in the Sunda Strait near Sumatra, Indonesia. NEIC reported it did some damage with intensity VIII in Labuhan, Banten; V in Randegeland, Serang, IV in Serang, and II-III in Rangkasbitung, Cilegon, Palabuhanratu, Java, Indonesia.

BMG reported this earthquake with M 6.7 was felt with intensity VI in Cikeusik, Panimbang, Labuan, Sumur; III-IV in Tangerang Selatan, Lembang, Kota Bogor, Pelabuhanratu, Kalianda, Bandar Lampung; III in Anyer, Jakarta II-III in Kota Tangerang, Ciracas, Bekasi, Kota Bandung, Kab Bogor and Kotabumi.

With a minor geomagnetic storm due on January 15, continued enhanced activity

in Indonesia appears likely for the next several days. The last earthquake within

about 200 km of this epicenter with M>=6.6 occurred on August 2, 2019 with M 6.9

about 100 km southwest of today's epicenter and prior to that as an M 6.8 within about

50 km on October 24, 2000." (January 14, 2022)

A swarm of earthquakes with magnitude up to moderate low M 4s occurred in the northern

Gulf of California. This is not part of the sequences to the south and north

which have been activated in the past several days and weeks but may be

part of the general seismic activation of this region following the solar

eclipse of April 8, 2024.

Two moderate earthquakes also occurred in Eritria, East Africa today with

M 4.5-5.0. They occurred about an hour after two M-class solar flares

with one near local solar midnight when geomagnetic effects can maximize.

Earthquakes in this area often occur with strong solar flares so this

correlation is not unexpected as strong flares return to the sun.

An unusually large aftershock occurred with M 2.9 in New Jersey today. NEIC reported it was felt with intensity IV in Gladstone, New Jersey.

NEIC reported this earthquake of M 3.5 in Southern Alaska was felt with intensity up to III in the area(s) of Southern Alaska in Nanwalek.

NEIC reported this earthquake of M 2.6 in Southern California was felt with intensity up to III in the area(s) of Southern California in Anza.

NEIC reported this earthquake of M 3.7 in the U.S. Virgin Islands was felt with intensity up to III in the area(s) of the U.S. Virgin Islands in Charlotte Amalie.

BMG reported this earthquake of M 5.2 in the Banda Sea, Indonesia was felt with intensity up to III in the area(s) of the Banda Sea, Indonesiain Kormomolin, Tanimbar and Maluku with intensity III and I in Wer Tamrian, Maktian, Labobar, Nirunmas and Molu Maru.

GEONET an earthquake of M 4.3 was felt with moderate to strong intensity in the area southeast of Wellington, New Zealand and in southern North Island and northern South Island. 3951 reports of felt events were made of which 2159 reported weak and 1517 light intensity with 240 report of moderate shaking and 18 with strong and 1 severe and 13 with extreme intensity came from the area.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: active April 28 disturbed April 29-30. Solar M-flare chance: 30% X-class: 5% proton storm: 5%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 12 14 12 17:00 5 154 153

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was given to this GRB as V>18.6.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was given to this GRB as V>17.3.

A strong GRB was recorded by SWIFT on April 21, 2024 at 09:42:54 UT (#240221B). An initial UVOT was given to this GRB as V>18.4.

April 27, 2024

The strongest earthquake in the world today was an M 6.0 in the South Indian Mid-ocean Ridge.

Several moderate aftershocks followed the mainshock. The last earthquake

of equal or greater magnitude within about 300 km of this epicenter in the

Central mid-Indian Ridge occurred as an M 6.1 on April 12, 2020. The only

early of significantly larger magnitude in this area in the past 35 years

was an M 6.4 on October 4, 2013. At the time this summary noted:

"A strong earthquake of M 6.4 hit near the triple junction in the mid-Indian Rise today. This is a remote

area and there were no reported effects on human populations which are few

in this oceanic region. This is the strongest earthquake to hit within 300

km of this epicenter in the past 25 years, so this is a significant regional

event. The only earthquakes of M>=6 in the region occurred in May, 2006 (M 6-6.1);

May 2002 (M 6.1-6.2) and August 1996 (M 6.0). A global seismic watch was

in effect when the quake occurred as it was near local solar midnight at the

time of occurrence, a time when tidal forces from the new moon were maximized.

Seismicity in this area is generally related to magma intrusion along the ridge

and magma is affected by tidal forces. Forecast 75729 had expected a moderate

to large earthquake within about 150 km of this epicenter was possible around

October 6.

...

The antipode of the earthquake om the Indian Ocean is in the Great Plains region of

the U.S. The most seismic areas in this region lie in Oklahoma and southern

Colorado. As the new moon reached its maximum tidal alignment, an M 2.7 hit

in Oklahoma near the antipode of the Indian Ocean event. Earthquakes in Oklahoma

are probably related to oil and gas extraction and induced seismicity such

as this can also be triggered during tidal alignments such as the full and

new moon." (October 4, 2013)

Today's epicenter is at the antipode of the path of the total solar eclipse

of April 8, 2024 across North America near Missouri, Kansas and Oklahoma

and may have been promoted by tidal energy associated with that eclipse

and the full moon of April 23. A series of minor earthquakes have occurred

along the eclipse Path in North America in the past two weeks. At least

two other moderate earthquakes have also occurred at antipodal positions

to the eclipse in the past 10 days - in the South Indian Ridge and south of Australia.

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Rat Islands, Alentians, Alaska.

It was reported felt in this remote area near Adak, Alaska with intensity up to III. This area had been expected

to see tidally enhanced seismicity with the full moon of April 23 near the IDL as reported

in this and previous issues of this summary:

"The full moon arrived on April 23, 2024 at 23:49 UT. Longitudes which are at local solar midnight at this time are located at about 5 East while those at local solar noon are near 175 West. In the east these include most of western Europe and Iceland while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/Kermadec Islands, New Zealand to the Balleny Islands and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are moderate to high." (April 17-26, 2024)

The region of Taiwan also remained active today. NEIC reported an M 5.7 followed by an aftershock of 5.4 and M 5.7 were felt

with intensity up to V in the area north of Hualien City, Taiwan. EMSC reported these events were felt

strongly in the Taiwanese districts of Xindian, Wenshan, Da'an, Datong, Neihu, Beitou, Shilin, Nantun, and Tamsui and the townships of Zhudong and in New Taipei and Taipei cities.

NEIC reported this earthquake of M 5.0 South of Bali was felt with intensity up to III in the area(s) of Java, Indonesia at Nusa Dua.

EMSC reported it was felt with moderate shaking in Bali, Indonesia at Kuta, Mengwi.

BMG did not immediately report intensities associated with this earthquake.

An unusual earthquake series is occurring in the northern Gulf of California.

NEIC reported the largest earthquake of M 4.3 in the Gulf of California, Mexico was felt with intensity up to III in the area(s) of the Gulf of California, Mexico in San Luis.

This is south of the off-and-on series near 30N 115W and north of the recent

swarm near 26N 110W both of which have been related to the solar eclipse

of April 8 in this summary. Ditto for today's new swarm.

NEIC reported this earthquake of M 4.3 in Cook Strait, New Zealand was felt with intensity up to III in the area(s) of Cook Strait, New Zealand in Patea.

EMSC reported strong shaking in Whanganui and lighter intensity in Stratford, Lower Hutt, Wellington. GEONET reported it was felt with moderate to strong intensity in the area southeast of Wellington, New Zealand and in southern North Island and northern South Island. 2855 reports of felt events were made of which 2051 reported weak and 750 light intensity with 42 report of moderate shaking and 4 with strong and 0 severe and 7 with extreme intensity came from the area.

NEIC reported this earthquake of M 4.3 in Southern Italy was felt with intensity up to III in the area(s) of Southern Italy in Monte di Procida, Naples, Marano di Napoli, Napoli,

EMSC reported this earthquake of M 4.1 in Turkey was felt with intensity up to III in the area(s) of Turkey of Inonu, Yenipazar

EMSC reported this earthquake of M 4.3 in the Russian Caucasus was felt with intensity up to III in the area(s) of the Russian Caucasus in Nebug, Tuapse, Tyance, Kroyanskoye, and Ust'-Labinsk.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: active April 27-28 disturbed April 29. Solar M-flare chance: 75% X-class: 15% proton storm: 15%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 19 30 11 19:00 6 154 153

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was given to this GRB as V>18.6.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was given to this GRB as V>17.3.

A strong GRB was recorded by SWIFT on April 21, 2024 at 09:42:54 UT (#240221B). An initial UVOT was given to this GRB as V>18.4.

April 26, 2024

It was a very quiet day in global seismicity today. No events of M>=5 were

recorded. Activation near 180 West longitude continued with moderate quakes

in Tonga, Kermadec Islands and New Zealand.

NEIC reported this earthquake of M 3.5 in Alaska was felt with intensity up to III in the area(s) of Alaska in Halibut Cove.

NEIC reported this earthquake of M 3.1 in Southern Idaho was felt with intensity up to III in the area(s) of Southern Idaho in Smiths Ferry.

NEIC reported this earthquake of M 2.6 in Oklahoma was felt with intensity up to III in the area(s) of Oklahoma in Prague.

EMSC reported this earthquake of M 4.0 in Poland was felt with intensity up to III in the area(s) of Polandi at Grebocice, Glogow.

EMSC reported this earthquake of M 4.6 in Southern Xinjiang, China was felt with intensity up to III in the area(s) of Southern Xinjiang, China in Almaty, Talgar, Kaskelen Kazakhstan.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: active April 26-28. Solar M-flare chance: 75% X-class: 15% proton storm: 15%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 3 0 3 18:00 2 196 167

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was given to this GRB as V>18.6.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was given to this GRB as V>17.3.

A strong GRB was recorded by SWIFT on April 21, 2024 at 09:42:54 UT (#240221B). An initial UVOT was given to this GRB as V>18.4.

April 25, 2024

Strong seismic activation continued near the International Date Line (IDL) and

the Greenwich Meridian today, consistent with strong tidal stresses with the

Full moon of April 23 as noted in this and previous issues of this summary:

The strongest earthquake of the day was an M 5.5 in the Kermadec Islands at 179 West

longitude. This event was not reported felt in this remote area. It is the strongest earthquake

in the Kermadec Islands since an M 6.1 on February 9, 2024 about 250 km north of today's epicenter.

The last such event within about 200 km of today's event occurred as an M 5.7 on November 13, 2023.

At the time this summary noted:

"An earthquake of M 5.7 also occurred today near the time of the new moon and

local solar midnight in the Kermadec Islands. It was not reported felt in this

remote region. This may be an aftershock of an M 6.1 northeast of this epicenter

on October 23, 2023. At the time this summary noted:

"The strongest earthquake in the world today was an M 6.1 in the Kermadec Islands.

It was preceded by an M 5.1 foreshock and followed by an M 4.5 which followed

near local solar noon while the M 6.1 occurred near local solar midnight. It is

likely that this activity was promoted by tidal stresses which maximize

near these times. The last earthquake in the Kermadec Islands of M>=6 occurred as an

M 6.6 on September 8, 2023." (October 23, 2023, November 13, 2023)

Likewise the strongest earthquake in the U.S. or Canada today was an M 4.6

in the western Andreanof Islands at 180 W longitude. NEIC reported it was felt

with intensity III in Adak, Alaska. This is the strongest earthquake in the western

Andreanof Islands or eastern Rat Islands since an M 5.0 on February 29, 2024

in the Andreanof Islands and an 5.8 in the Rat Islands on March 30, 2024. At

the time of this event in the Rat Islands, this summary noted:

"The strongest earthquake in the world today was an M 5.8 in the Rat Islands, Aleutians, Alaska. It was not reported felt in this remote area.

This earthquake was not reported felt in this epicentral area. The last earthquake of

equal or larger magnitude in the Rat Islands was an M 6.3 on December 14, 2022." (March 30, 2024)

NEIC reported this earthquake of M 5.0 in Mindanao, Philippines was felt with intensity up to III in the area(s) of Mindanao, Philippines in Kinablangan.

NEIC reported these earthquakes of M 4.7 and M 5.1 in Taiwan were felt with intensity up to IV in the area(s) of Taiwan in Hualien City.

EMSC reported strong shaking in Taiwan in the Districts of Nangang, Da'an, Nantun and in Taoyuan City and Taipei City.

NEIC reported this earthquake of M 2.9 in Southern Colorado was felt with intensity up to IV in the area(s) of Southern Colorado in El Moro.

NEIC reported this earthquake of M 4.2 in Kyushu, Japan was felt with intensity up to III in the area(s) of Kyushu, Japan in Miyazaki.

NEIC reported this earthquake of M 4.5 in Los Lagos, Southern Chile was felt with intensity up to III in the area(s) of Southern Chile in Loncoche.

EMSC reported moderate shaking in Chile at Valdivia, Pucon.

NEIC reported this earthquake of M 3.3 off the coast of Northern California was felt with intensity up to III in the area(s) of Northern California in Petrolia.

NEIC reported this earthquake of M 2.9 in Central California was felt with intensity up to IV in the area(s) of Central California in Seven Trees.

NEIC reported this earthquake of M 5.1 in Eastern Honshu, Japan was felt with intensity up to IV in the area(s) of Eastern Honshu, Japan in Funaishikawa.

EMSC reported moderate shaking in Honshu, Japan at Chuo, Tokyo, Miyamae among others.

EMSC reported an aftershock of M 4.0 was felt with lightly in Hitachinaka, Japan.

NEIC reported this earthquake of M 4.7 in Metropolitana, Chile was felt with intensity up to III in the area(s) of Bio-Bio, Chile in Puente Alto.

EMSC reported strong shaking in Chile at La Florida, Lo Barnechea, Talagante, Rancagua, Cerro Navia, Olmue, Limache.

NEIC reported this earthquake of M 4.5 in El Salvador was felt with intensity up to IV in the area(s) of El Salvador in Puerto El Triunfo.

EMSC reported moderate shaking in El Salvador at San Salvador.

EMSC reported this earthquake of M 4.2 in Algeria was felt with intensity up to III in the area(s) of Algeria at Ighram, Aghbalou, Chorfa, Ain el Hammam, Saharidj, Ait Toudert, Tizi Ouzou, Bouira, Magra, Alger Centre, Ramdane Djamel.

EMSC reported this earthquake of M 4.1 in Greece was felt with intensity up to III in the area(s) of Greece in Kalamata.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: active April 25-27. Solar M-flare chance: 75% X-class: 15% proton storm: 15%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 4 1 4 14:00 2 283 199

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was given to this GRB as V>18.6.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was given to this GRB as V>17.3.

A strong GRB was recorded by SWIFT on April 21, 2024 at 09:42:54 UT (#240221B). An initial UVOT was given to this GRB as V>18.4.

The full moon arrived on April 23, 2024 at 23:49 UT. Longitudes which are at local solar midnight at this time are located at about 5 East while those at local solar noon are near 175 West. In the east these include most of western Europe and Iceland while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/Kermadec Islands, New Zealand to the Balleny Islands and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are moderate to high.

April 24, 2024

An unusual earthquake of M 5.0 occurred in the North mid-Atlantic Ridge today.

It was not reported felt in this remote area. It was followed later by an M 4.8

to the northwest of the M 5.0 in the Reykjanes Ridge. The M 5.0 is the strongest earthquake

within about 200 km of this epicenter since an M 5.2 on March 22, 2019 and an M 5.4

on September 30, 2013. The only earthquake within about 100 km of this epicenter

of larger magnitude than M 5.0 was an M 5.2 on August 27, 2007. Events of M 5.0

also hit in this area on April 12, 2016, February 6, 2008, July 20, 2004 and May 2, 1991.

At the time of the April, 2016 event this summary noted:

"near-antipodal activity to the Macquarie Island area occurred in the Northern

Mid-Atlantic with M 5.1 and 4.6 and like the other oceanic quakes today was

not felt in these remote epicentral areas. This activity is near antipodal suggesting

that the geomagnetic storm effects were the prime triggering factors. The

events in the North Atlantic occurred during the height of the geomagnetic

storm." (April 12, 2016)

The path of the total eclipse of the sun on April 8, 2024 passed over this epicenter in the North Atlantic

near its termination. NASA shows the termination of the eclipse occurred at

19:54 UT over this epicenter and passed over the smaller event's epicenter

at 19:53 UT. These events were probably promoted by tidal stresses from

the eclipse and from today's full moon.

An earthquake of M 5.5 occurred today in the area of Panama. NEIC reported it was felt with intensityup to IV in Boca Chica, Panama.

It occurred near the completion of the full moon today as noted in this and

previous issues of this summary:

"The full moon will arrive on April 23, 2024 at 23:49 UT. Longitudes which are at local solar midnight at this time are located at about 5 East while those at local solar noon are near 175 West. In the east these include most of western Europe and Iceland while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/Kermadec Islands, New Zealand to the Balleny Islands and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are moderate to high." (April 20-23, 2024)

It was probably promoted by strong tidal stresses with this full moon.

The last earthquake with M>=5.5 in Panama within about 200 km of this

epicenter occurred on April 4, 2023 with M 6.3 - an earthquake which also

occurred with the full moon. At the time this summary noted:

A series of strong earthquakes occurred today. These events of M 6.3 in Panama; M 6.2-6.4 in

Central Philippines and M 5.9 in Atacama, Chile occurred near longitudes of

maximum tidal stress expected with the full moon coming on April 6 ...

The full moon will arrive on April 6, 2023 at 04:35 UT. ...

The strongest earthquake in the world today was an M 6.3-6.5 in the area south of Panama. NEIC reported it was felt with intensity VII in Chiriqui, Panama at Berba with VI shaking in Bagala and V in David. Intensity IV was also felt in Chiriqui, Panama at Boquete, Volcan, Almirante Bocas Del Toro, Horconcitos and in Gulfito, Puntarenas, Costa Rica.

This event is near the antipode of the M 6.1 in Sumatra reported in the

previous summary and may have been promoted by focused seismic energy from

that source ..." (April 4, 2023)

Another earthquake of M 5.5 occurred today in the Loyalty Islands.

This event occurred near local solar noon near the time of the full moon

at a longitude which was expected to see maximum tidal stresses at this time.

It was probably promoted by full moon tidal stresses.

The last earthquake with M>=5.5 in the Loyalty Islands was an M 5.8 on December 24, 2023.

At the time this summary noted in this regard:

"The strongest earthquake in the world today was an M 5.7 in the region of the Loyalty Islands

and New Caledonia. NEIC reported it was felt with intensity up to IV in the epicentral zone.

This is probably an aftershock of the M 7.1 in southern Vanuatu of December 8,

the strongest to date." (December 17, 2023)

Several other shocks also occurred today near the International Date Line where

tidal stresses with this full moon were maximized.

An M 4.4 in the Rat Islands, for example was the largest event in the U.S.

or Canada. Other earthquakes near the longitude of maximum tidal stress

with this full moon occurred in New Zealand (M 5.4); the Kermadec Islands

(M 5.2) and as an M 5.4 in Tonga. The earthquake in the Rat Islands was

reported by NEIC to have been felt with intensity up to III in Adak, Alaska.

A series of light earthquakes also occurred today in Yellowstone National Park, Montana.

NEIC reported these events of M 2.7, 3.1 ... were felt with light intensity

in Hebgen Lake Estates, Montana.

NEIC reported these earthquakes of M 3.0 and M 2.9 in Western Texas were felt with intensity up to III in the area(s) of Western Texas in Van Horn.

NEIC reported this earthquake of M 2.9 in Baja California, Mexico was felt with intensity up to III in the area(s) of Baja California, Mexico in Rosarito.

NEIC reported this earthquake of M 2.6 in Southern Texas was felt with intensity up to III in the area(s) of Southern Texas in Falls City.

NEIC reported this earthquake of M 4.9 in Papua New Guinea was felt with intensity up to III in the area(s) of Papua New Guinea in Lae.

EMSC reported this earthquake of M 2.0 in Central California was felt with intensity up to III in the area(s) of Central California in Walker.

EMSC reported this earthquake of M 4.2 in Alberta, Canada was felt with intensity up to III in the area(s) of Alberta, Canada in Grande Prairie where furniture rocked.

EMSC reported this earthquake of M 4.6 in Southern Xinjiang, China was felt with intensity up to III in the area(s) of Southern Xinjiang, China in Almaty, Kazakhstan.

EMSC reported this earthquake of M 4.0 in Costa Rica was felt with intensity up to III in the area(s) of Costa Rica in Cobano.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: unsettled April 24, active April 25-26. Solar M-flare chance: 75% X-class: 20% proton storm: 20%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 8 11 9 14:00 4 282 214

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was given to this GRB as V>18.6.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was given to this GRB as V>17.3.

A strong GRB was recorded by SWIFT on April 21, 2024 at 09:42:54 UT (#240221B). An initial UVOT was given to this GRB as V>18.4.

The full moon will arrive on April 23, 2024 at 23:49 UT. Longitudes which are at local solar midnight at this time are located at about 5 East while those at local solar noon are near 175 West. In the east these include most of western Europe and Iceland while in the west areas of the western Aleutians, Alaska, Hawaii, Tonga/Fiji/Kermadec Islands, New Zealand to the Balleny Islands and portions of the Pacific-Antarctic Ridge are included. These are the most likely areas to see significant tidal triggering with this full moon. Other areas may also see tidal promotion in the next week especially at times of large solar flares and near local solar midnight and solar noon. The likelihood of a strong associated earthquake with this full moon are moderate to high.

April 23, 2024

A strong series of aftershocks of moderate to large magnitude is

occurred in Taiwan with two strong quakes of M 6.0 and 6.1. Local news reports these event have caused further damage

to structures weakened by the M 7.4 in Taiwan of April 2, 2024.

These are the strongest aftershocks in Taiwan of the April 2, 2004 mainshock

since April 2 when an M 6.4 aftershock occurred. NEIC reported the events of M 6.0 and M 6.1 were felt with intensity up to VIII

with damage in Hualien City, Taiwan. EMSC reported they were felt in Taiwan

with strong to extreme intensity in Zhuangwei Township East Districk, Hsinchu, Shihjhalun, Xindian District, Wenshan District, Yonghe District, New Taipei City, Da'an District, Zhongzhen District, Beitou District, Tamsui District.

The first of the moderately large earthquakes in Taiwan today occurred

near local solar midnight and may have been promoted by the full moon of

April 23. Forecast seismicity with the full moon had been noted in

previous issues of this summary as:

The strongest earthquake in the U.S. or Canada today was an M 3.4 north of Juneau, Alaska. NEIC reported it was felt with intensity up to IV in Juneau, Alaska.

An unusual earthquake of M 2.5 occurred today in Watertown, New York.

This epicenter was on the path of total eclipse of the sun on April 8 where

the eclipse was visible for more than 4 minutes. This event was probably promoted

by strong tidal stresses associated with that eclipse.

A series of minor earthquakes occurred in northern Mexico in Leon and Tamaulipas today.

This epicenter saw the total eclipse of the sun on April 8, 2024 when it was

at its greatest. Today's activity was probably promoted by strong tidal stresses

at that time.

NEIC reported this earthquake of M 4.3 in North Island, New Zealand was felt with intensity up to III in the area(s) of North Island, New Zealand in Bay View.

NEIC reported this earthquake of M 4.4 in Greece was felt with intensity up to III in the area(s) of Greece in Lardos.

EMSC reported this earthquake of M 4.8 in the Eastern Mediterranean Sea was felt with intensity up to III in the area(s) of the Eastern Mediterranean Sea in Greece at Rhodes, and in Turkey at Cildir, Sanana, Camdibi, Beldibi, Iskele, Yeni, Emirbeyazit, Goynuk, Guller Pinan, Oba, Cikcilli, Kestel among othrs.

NEIC reported this earthquake of M 4.0 in Kazakhstan was felt with intensity up to III in the area(s) of Kazakhstan in Karaton.

EMSC reported moderate intensity in Kazakhstan in Qosshagyl auyldyq okrug, Tengiz, Qulsary qalalyq akimshilik.

NEIC reported this earthquake of M 2.6 in Southern Idaho was felt with intensity up to III in the area(s) of Southern Idaho in Smiths Ferry.

NEIC reported this earthquake of M 5.3 South of Java was felt with intensity up to III in the area(s) of Java in Trenggalek, Indonesia.

EMSC reported a short shake in Pacotan, Gandusari, Kedungwaru, Nquntoronadi, Blitar, Turi, Mengwi, Indonesia.

BMG reported intensity III in Kab Gunungkidul, Pnorogo, Tulungagung and Magetan with lesser shaking of intensity II in Kebumen, Purworejo, Klaten, Wonogiri, Bantul among others.

NEIC reported this earthquake of M 4.1 in Central Alaska was felt with intensity up to IB in the area(s) of Central Alaska in Holy Cross.

NEIC reported this earthquake of M 1.5 in New Jersey was felt with intensity up to III in the area(s) of New Jersey in Gladstone.

EMSC reported this earthquake of M 4.1 in Mindanao, Philippines was felt with intensity up to III in the area(s) of Mindanao, Philippines in Davao City.

EMSC reported this earthquake of M 4.6 in North Island, New Zealand was felt with intensity up to III in the area(s) of North Island, New Zealand in Napier.

GEONET reported this earthquake was felt with moderate intensity in the area of Taupo, North Island, New Zealand with moderate shaking felt by 1711 people in northern North Island. Nearly 1711 people reported feeling this earthquake with 944 with weak intensity, 686 light, 72 moderate, 6 strong, 0 severe and 1 extreme.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: unsettled April 24, active April 23 and 25. Solar M-flare chance: 75% X-class: 20% proton storm: 20%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 9 13 9 7:00 4 283 227

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was given to this GRB as V>18.6.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was given to this GRB as V>17.3.

A strong GRB was recorded by SWIFT on April 21, 2024 at 09:42:54 UT (#240221B). An initial UVOT was given to this GRB as V>18.4.

April 22, 2024

The strongest earthquake in the world today was an M 5.5 in the Jalisco/Michoacan area of Mexico. This is the largest earthquake of M>=5.5 within about 250 km of this epicenter since an M 5.8 and M 5.6 on September 8, 2023. Other recent earthquakes of M>=5.5 have occurred on July 18, 2023 (M 5.6) and December 22, 2021 with M 6.0. An earthquake north of this in the Gulf of California with M 5.6-5.9 on April 19. Both of these events occurred near the greatest total eclipse of the sun of April 8 which occurred at 18:00 UT. The area has experienced a series of moderate earthquakes since that eclipse but this is the strongest of this series. It is likely that today's event was promoted by strong tidal stresses with that eclipse as well as those with the full moon alignment of April 23.

NEIC reported these earthquakes of M 3.3 and M 2.7 in Northern California were felt with intensity up to V in the area(s) of Northern California in the Geysers.

NEIC reported this earthquake of M 4.8 in the Molucca Sea, Indonesia was felt with intensity up to III in the area(s) of the Molucca Sea, Indonesia in Ternate.

NEIC reported this earthquake of M 4.5 South of Java was felt with intensity up to III in the area(s) of Java in Cilacap, Indonesia.

EMSC reported a short shake in Pangandaran, Indonesia.

NEIC reported this earthquake of M 4.7 in Taiwan was felt with intensity up to III in the area(s) of Taiwan in Hualien City.

EMSC reported gentle to strong shaking in tTaiwan at Jiaoxi Township, New Taipei City, and the Districts of Da'an, Tamsui.

NEIC reported this earthquake of M 2.7 in Utah was felt with intensity up to IV in the area(s) of Utah at Summit.

NEIC reported this earthquake of M 4.6 in Vanuatu was felt with intensity up to III in the area(s) of Vanuatu in Sola.

NEIC reported this earthquake of M 2.3 in Ohio was felt with intensity up to IV in the area(s) of Ohio at Walbridge.

The total eclipse of the sun was visible for four minutes at this epicenter

on April 8 at 19:10 UT. It is likely that this earthquake was promoted

by tidal stresses with this eclipse and the coming full moon of April 23.

NEIC reported this earthquake of M 2.0 in Northern California was felt with intensity up to III in the area(s) of Northern California at Redway.

NEIC reported this earthquake of M 1.3 in New Jersey was felt with intensity up to III in the area(s) of New Jersey in Gladstone.

NEIC reported this earthquake of M 2.2 in Oklahoma was felt with intensity up to III in the area(s) of Oklahoma in Pawnee.

NEIC reported this earthquake of M 1.6 in Texas was felt with intensity up to III in the area(s) of Christine, Texas.

The total eclipse of the sun was visible for four minutes, 11 seconds at this epicenter

on April 8 at 18:58 UT. It is likely that this earthquake was promoted

by tidal stresses with this eclipse and the coming full moon of April 23.

A series of minor earthquake has been occurring near this site including

an M 3.2 yesterday in the past several days.

NEIC reported this earthquake of M 2.4 in Missouri was felt with intensity up to III in the area(s) of Matthews, Missouri.

The total eclipse of the sun was visible for four minutes, 11 seconds at this epicenter

on April 8 at 18:58 UT. It is likely that this earthquake was promoted

by tidal stresses with this eclipse and the coming full moon of April 23.

EMSC reported this earthquake of M 4.2 in Valparaiso, Chile was felt with intensity up to III in the area(s) of Valparaiso, Chile in Vina del Mar, Cerro Navia.

EMSC reported this earthquake of M 3.8 in Switzerland was felt with intensity up to III in the area(s) of Switzerland in Concise, Corcelles-pres-Concise, Champagne, Cortaillod, Estavayer, without damage.

EMSC reported this earthquake of M 1.8 in Tasmania, Australia was felt with intensity up to III in the area(s) of Tasmania, Australia at Grove.

Local press also reported this unusual earthquake in Tasmania was felt in the

epicentral region with an earthquake noise and unusual vibration.

EMSC reported this earthquake of M 4.6 in Central Turkey was felt with intensity up to III in the area(s) of Central Turkey in Altiyuzevler, Yarahmet, Yesilirmak, Samlar, Yesilyurt, Kadisehri, Emek, Kurtulus, Tepecik, Adalet, Cumhuriyet, Atakent Alanli, Yeni, Sogutozu.

BMG reported this earthquake of M 5.0 in Tanimbar, Indonesia was felt with intensity up to III in the area(s) of Tanimbar, Indonesia in Wuar, Taminbar, Kormomolin, Molu Maru and with intensity I in Kab. Maluku, Buru, Seram, Ambon, Maybrat, Kaimana, Teluk Wondama, Bintumi Raja Ampat among othrs.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: unsettled April 22 and 24, active April 23. Solar M-flare chance: 75% X-class: 20% proton storm: 20%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 19 36 14 10:00 6 283 217

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was not given to this GRB.

April 21, 2024

NEIC reported this earthquake of M 5.1 in Taiwan was felt with intensity up to IV in the area(s) of Taiwan in Hualien City.

EMSC reported strong shaking in Taiwan in the Qingshui and Nangang Districts and in Taipei City.

NEIC reported this earthquake of M 4.3 in Nicaragua was felt with intensity up to III in the area(s) of Nicaragua in El Crucero.

EMSC reported light shaking in Nicaragua at Nagarote, Ciudad Sandino.

NEIC reported this earthquake of M 2.5 in Central California was felt with intensity up to III in the area(s) of Central California in Home Garden.

NEIC reported this earthquake of M 3.3 in Central Alaska was felt with intensity up to III in the area(s) of Central Alaska in Petersville.

NEIC reported this earthquake of M 4.9 in Chiapas, Mexico was felt with intensity up to III in the area(s) of Chiapas, Mexico in Lazaro Cardenas.

NEIC reported this earthquake of M 2.5 in Southern Texas was felt with intensity up to III in the area(s) of Southern Texas in Falls City.

NEIC reported this earthquake of M 3.0 in Central Alaska was felt with intensity up to III in the area(s) of Central Alaska in Skwentna.

NEIC reported this earthquake of M 3.2 in Southern Alaska was felt with intensity up to III in the area(s) of Southern Alaska in Anchor Point.

EMSC reported this earthquake of M 4.6 in Iran was felt with intensity up to III in the area(s) of Iran at Khowy, Dzhul'fa, Tabriz and in Azerbaijan at Nakhcivan, Naxcivan.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: unsettled 22, active April 21 and 23. Solar M-flare chance: 75% X-class: 20% proton storm: 20%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 12 21 10 10:00 6 240 210

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was not given to this GRB.

April 20, 2024

NEIC reported these aftershocks of M 4.4 in the Gulf of California was felt with intensity up to III in the area(s) of the Gulf of California in Loreto, Mexico.

NEIC reported this earthquake of M 2.8 in Washington State was felt with intensity up to III in the area(s) of Washington State in Richland.

EMSC reported it was felt with moderate shaking in Washington at Richland and Kennewick.

NEIC reported this earthquake of M 4.3 in Costa Rica was felt with intensity up to III in the area(s) of Costa Rica in Quepos.

NEIC reported this earthquake of M 3.1 in Southern Alaska was felt with intensity up to III in the area(s) of Southern Alaska in Larsen Bay.

NEIC reported this earthquake of M 2.6 in Baja California, Mexico was felt with intensity up to III in the area(s) of Baja California, Mexico in Progreso.

NEIC reported this earthquake of M 2.5 in Southern Texas was felt with intensity up to III in the area(s) of Southern Texas in Karnes City.

NEIC reported this earthquake of M 4.3 in Greece was felt with intensity up to IV in the area(s) of Greece in Neon Karlovasion.

EMSC reported it was felt with moderate intensity in Ampelos, Kampos, Neo Karlovasi, Kokkari, Velanidia Koumaiika, Kamps Marathokampos, Samos, and in Turkey in Guzelcamli, Sigacik, Kusadasi, Turkmen among others.

NEIC reported this earthquake of M 2.0 in Northern California was felt with intensity up to III in the area(s) of Northern California in Dixon.

NEIC reported this earthquake of M 2.4 in Pennsylvania was felt with intensity up to IV in the area(s) of Pennsylvania in Lincoln Park.

NEIC reported this earthquake of M 2.3 in Northern California was felt with intensity up to III in the area(s) of Northern California in Angwin.

NEIC reported these earthquakes of M 2.1 and 1.3 in New Jersey was felt with intensity up to III in the area(s) of New Jersey in Califon and Gladstone.

EMSC reported this earthquake of M 4.0 in the Korea Strait was felt with intensity up to II in the area(s) of Korea in Daegu.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: unsettled April 20 and 22, active April 21. Solar M-flare chance: 75% X-class: 20% proton storm: 20%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 41 46 41 20:00 7 243 213

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 18, 2024 at 20:24:08 UT (#240218A). An initial UVOT was given to this GRB as V>19.3.

A strong GRB was recorded by SWIFT on April 19, 2024 at 01:48:01 UT (#240219A). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 19, 2024 at 12:23:25 UT (#240219B). An initial UVOT was not given to this GRB.

April 19, 2024

The strongest earthquakes in the world today occurred within one minute of each

other. They were reported by NEIC with magnitude M 5.6 in the Gulf of California

and M 5.6 in Western Turkey. The event in Turkey was reported with intensity VII

to have been felt with intensity up to VII in Sulusaray, Turkey. The last

earthquake within about 200 km of this epicenter in western Turkey with M>=5.6

occurred on August 14, 1996 with M 5.7-5.8. A major earthquake occurred about 300 km

southeast of this epicenter on February 6, 2023 and did much damage in the

area of central Turkey. EMSC reported strong shaking in Turkey at Balikhisar, Korucuk, Bedirkale, Turhal, Ahishavi, Istanbulluoglu, Kizilkoy, Yunus Emre, Yeniyol, Karsiyaka, Buyukbeybagi, Kaleardi, Esentepe, and up to 350 km from the epicenter in Toros, Turkey. .

The earthquake of M 5.6 in the Gulf of California was the largest event to date

in a swarm which began after the total solar eclipse of April 8, 2024. While

not total at this epicenter the maximum of this eclipse occurred about 400 km

south of this epicenter over Jalisco, Mexico. It is likely that strong

tidal stresses from that alignment helped promote today's moderate earthquake

in the area. A foreshock of M 5.2 occurred in the region earlier in the day and was

reported by NEIC to have been felt with intensity up to IV in Loreto, Mexico. The last earthquake of M>=5.6 within about 200 km of this

epicenter in the Gulf of California was an M 6.3 on January 19, 2018. At the

time this summary noted:

"The M 6.3 is the strongest earthquake within about 200 km of this epicenter since an

M 6.5 on October 19, 2013. The largest event in the areas in the past 25 years

was an M 6.6 on January 4, 2006 and a similar M 6.6 on August 28, 1995. Occasionally

large earthquakes in the Gulf of California can increase seismicity along

strike-slip faults to the north including along the southern San Andreas in California." (January 19, 2018)

A major eruption of Mount Ruang on Sanguine Islands, Indonesis occurred today. It was accompanied

by tsunami warnings and falling volcanic ash and projectile bombs. Ruang is

located in the area of North Sulawesi Province in Indonesia and erupted at least

five times in the past 24 hours. The local airport at Manado has been shut down

temporarily and access to the area is being restricted while residents are

evacuated.

The volcanic eruption in Iceland which has been ongoing for the past month

also made a resurgence today with a major eruption today.

The strongest earthquake in the U.S. or California today was an M 4.3 in Central California.

NEIC reported this earthquake of M 4.3 in Central California was felt with intensity up to V in the area(s) of Central California in Bodfish.

An aftershock of M 3.2 was felt with intensity V in Bodfish, California. A number

of other aftershocks were also felt lightly.

EMSC reported the mainshock was strongly felt in California at Bodfish, Lake Isabella, Wofford Heights, Caliente, Weldon, where buildings shook, Kernville, Bakersfield, Tehachapi, Arvin, Springville, Delano, Porterville, Ridgecrest, Tulare among others.

NEIC reported these earthquakes of M 1.0, M 1.5 and M 1.4 in New Jersey were felt with intensity up to III in the area(s) of New Jersey in Califon.

NEIC reported this earthquake of M 4.5 in SE Honshu, Japan was felt with intensity up to III in the area(s) of SE Honshu, Japan in Fujioka.

NEIC reported this earthquake of M 1.7 in Oregon was felt with intensity up to III in the area(s) of Oregon in Wapanitia.

NEIC reported this earthquake of M 2.5 in Central California was felt with intensity up to III in the area(s) of Central California in Pinnacles.

NEIC reported this earthquake of M 4.5 in Northern Chile was felt with intensity up to III in the area(s) of Northern Chile in Tocopilla.

NEIC reported this earthquake of M 3.6 in Central Alaska was felt with intensity up to III in the area(s) of Central Alaska in Susitna North.

NEIC reported this earthquake of M 2.6 in Wyoming was felt with intensity up to III in the area(s) of Wyoming in Bondurant.

NEIC reported this earthquake of M 2.7 in Northern California was felt with intensity up to III in the area(s) of Northern California in Prattville.

NEIC reported this earthquake of M 3.4 off the coast of Northern California was felt with intensity up to III in the area(s) of Northern California in Petrolia.

NEIC reported this earthquake of M 5.2 in Southern Mid-Atlantic Ridge was felt with intensity up to III in the area(s) of Southern Mid-Atlantic Ridge.

EMSC reported this earthquake of M 4.9 in New Zealand was felt with intensity up to III in the area(s) of New Zealand in Opotiki.

GEONET reported it with M 5.4 was lightly felt in North Island, New Zealand by a number of respondents.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: quiet April 19 unsettled April 20, active April 21. Solar M-flare chance: 75% X-class: 20% proton storm: 20%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 4 1 5 12:00 2 247 227

A strong GRB was recorded by SWIFT on April 11, 2024 at 15:32:54 UT (#240211B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 14, 2024 at 02:20:36 UT (#240214A). An initial UVOT of V>19.60 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 06:26:53 UT (#240215A). An initial UVOT of V>18.98 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

April 18, 2024

The strongest earthquake in the world today damaged areas of Shikoku and Kyushu, Japan. NEIC reported this earthquake of M 6.3 in Shikoku, Japan was felt with intensity up to IX in the area(s) of Shikoku, Japan in Uwajima.

EMSC reported to strong to damaging shaking in Shikoku at Beppu, Kumamoto, Hakata, Chuo, Kita, Minami, Japan.

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the area of Vancouver, British Columbia, Canada. NEIC reported it was felt with intensity III in Port McNeill, Canada.

NEIC reported this earthquake of M 2.2 in Oklahoma was felt with intensity up to III in the area(s) of Oklahoma in Sparks.

An M 5.3 also occurred today in the Gulf of California, Mexico. This follows

a strong regional foreshock sequence. Earthquakes in this area of M 5.3,

M 4.9 and M 4.7 in the Gulf of California were felt with intensity up to VIII in the area(s) of the Gulf of California in Loreto and Pozo Dulce.

NEIC reported this earthquake of M 4.3 in Southern Xinjiang, China was felt with intensity up to V in the area(s) of Southern Xinjiang, China in Aykol.

NEIC reported this earthquake of M 5.5 in Nicaragua was felt with intensity up to IV in the area(s) of Nicaragua in Cardenas.

EMSC reported strong shaking in Nicaragua at Cidad Sandino, Nagarote, and in Costa Rica at La Asuncion, San Antonio, Curridabat, Aserri, Dulce Nombre, Puerto Cortes.

NEIC reported this earthquake of M 4.4 in Colombia was felt with intensity up to III in the area(s) of Colombia in Curiti.

NEIC reported this earthquake of M 2.8 in Arkansas was felt with intensity up to IV in the area(s) of Arkansas in Dell.

The solar eclipse of April 8 was observed at this epicenter. This earthquake

was probably promoted by strong tidal stresses associated with that eclipse.

NEIC reported this earthquake of M 3.0 off the coast of Northern California was felt with intensity up to III in the area(s) of Northern California in Petrolia.

NEIC reported this earthquake of M 1.1 in New Jersey was felt with intensity up to II in the area(s) of New Jersey in Califon.

NEIC reported these earthquakes of M 2.6 and M 2.6 off the coast of Southern California were felt with intensity up to IV in the area(s) of Southern California in Long Beach and Rancho Palos Verdes.

NEIC reported they were felt with moderate shaking in California at Long Beach, Signal Hill, Lakewood, Carson, Torrance, Fontana, Tustin, Atascadero.

NEIC reported this earthquake of M 2.5 in Northern California was felt with intensity up to III in the area(s) of Northern California in Kenwood.

NEIC reported this earthquake of M 6.3 in Shikoku, Japan was felt with intensity up to IX in the area(s) of Shikoku, Japan in Uwajima.

NEIC reported these earthquakes of M 4.9 and M 4.7 in the Gulf of California were felt with intensity up to VIII in the area(s) of the Gulf of California in Loreto.

NEIC reported this earthquake of M 5.0 in Taiwan was felt with intensity up to IV in the area(s) of Taiwan in Hualien City.

PHIVOLCS reported this earthquake of M 5.0 in Mindanao, Philippines was felt with intensity up to IV in the area(s) of Mindanao, Philippines in General Luna; III in Libjo, Dinagat Islands, Dapa, Pilar, San Benito, Santa Monica Surigao del Norte with intensity II in Surigao del Sur, Philippines.

BMG reported this earthquake of M 5.0 South of Java, Indonesia was felt with intensity up to II in the area(s) of Kab. Gresik, Sragen, Grobogan, Blora, Rembang, Pati, Kudus, Jepara, Pacitan, Lumajang, Sidoarjo, Bojonegoro, Tuban, Lamongan, Bangkalan, Sampag, Pamekasan, Sumenep and Sirabaua.

EMSC reported this earthquake of M 4.0 in Xinjiang, China was felt with intensity up to III in the area(s) of Xinjiang, China in Kazakhstan at Talgar, Almaty.

EMSC reported these earthquakes of M 4.0 and M 4.6 in Eastern Turkey were felt with intensity up to III in the area(s) of Eastern Turkey in Emek, Kucukminare, Fatih, Kardesler, Liman.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: minor storms April 18 unsettled April 19-20. Solar M-flare chance: 65% X-class: 10% proton storm: 10%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 7 13 8 20:00 5 199 217

A strong GRB was recorded by SWIFT on April 11, 2024 at 15:32:54 UT (#240211B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 14, 2024 at 02:20:36 UT (#240214A). An initial UVOT of V>19.60 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 06:26:53 UT (#240215A). An initial UVOT of V>18.98 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

April 17, 2024

The strongest earthquake in the world today was an M 5.5 near Guam. NEIC reported it was felt with intensity IV in Inarajan, Guam.

A series of moderate earthquakes occurred today in the Gulf of California, Mexico today.

The largest of these was an M 4.9. NEIC reported it was felt with intensity up to III in Loreto, Mexico.

EMSC reported light shaking in the epicentral area.

A series of light to moderate earthquakes occurred today in the area of Coso Junction, California.

NEIC reported these events including an M 3.4, 3.4, 3.4 and 3.9 were felt with intensity up to III in Coso Junction, CA.

NEIC reported this earthquake of M 5.2 in the Andaman Islands, India was felt with intensity up to V in the area(s) of the Andaman Islands, India in Blair, India.

NEIC reported this earthquake of M 4.4 in North Island, New Zealand was felt with intensity up to III in the area(s) of North Island, New Zealand in Hicks Bay.

NEIC reported this earthquake of M 5.0 in Mindanao, Philippines was felt with intensity up to V in the area(s) of Mindanao, Philippines in Union.

EMSC reported moderate shaking in Butuan City, Philippines.

NEIC reported this earthquake of M 2.8 in Los Angeles was felt with intensity up to IV in the area(s) of Los Angeles at View Park and Windsor Hills.

EMSC reported a strong jolt in Los Angeles at Culver City, Los Angeles, Inglewood, Hawthorne, Santa Monica, Valley Village, Torrance.

EMSC reported this earthquake of M 4.9 in Northern Xinjiang, China was felt with intensity up to III in the area(s) of Northern Xinjiang, China in Almaty.`

EMSC reported this earthquake of M 4.3 in Eastern Turkey was felt with intensity up to III in the area(s) of Eastern Turkey in Tandogan, Zafer, Bahceli Evler, Ismetiye, Malatya, Bostanbasi, Inonu, Dilek, Altinsehir, Nuripazarbasi, Yavuzlu, Kucukminare, Yesilyurt among others.

EMSC reported this earthquake of M 4.4 in Taiwan was felt with intensity up to III in the area(s) of Taiwan in Linkou District.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: active April 17 minor storms April 18 unsettled April 19. Solar M-flare chance: 60% X-class: 10% proton storm: 10%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 31 36 17 22:00 6 176 199

A strong GRB was recorded by SWIFT on April 11, 2024 at 15:32:54 UT (#240211B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 14, 2024 at 02:20:36 UT (#240214A). An initial UVOT of V>19.60 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 06:26:53 UT (#240215A). An initial UVOT of V>18.98 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 03:10:49 UT (#240215B). An initial UVOT was not given to this GRB.

April 16, 2024

The strongest earthquake in the world today was an M 5.9 in the Ryukyu Islands of Japan. NEIC reported it was felt with intensity up to IV in Koshima, Japan.

The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Near Islands, Alaska. NEIC reported it was felt with intensity up to III in Attu Station, Alaska.

NEIC reported this earthquake of M 2.9 in Western Texas was felt with intensity up to III in the area(s) of Western Texas in Whites City, New Mexico.

NEIC reported these earthquakes of M 3.0 off the coast of Northern California were felt with intensity up to III in the area(s) of Northern California in Petrolia.

NEIC reported this earthquake of M 3.2 in Hawaii was felt with intensity up to III in the area(s) of Hawaii in Pahala.

NEIC reported this earthquake of M 3.6 in Unimak, Alaska was felt with intensity up to III in the area(s) of Unimak, Alaska in Sand Point.

EMSC reported this earthquake of M 2.7 in Southeastern Australia was felt with intensity up to III in the area(s) of Southeastern Australia in Mount Barker and Strathalbyn with a thundering earthquake noise.

BMG reported this earthquake of M 5.0 in the Banda Sea was felt with intensity up to III in the area(s) of the Banda Sea in Kab. Alor and Maluku Barat Daya.

GUC reported this earthquake of M 4.0 in Arica, Chile was felt with intensity up to III in the area(s) of Arica, Chile.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: active April 16-18. Solar M-flare chance: 60% X-class: 5% proton storm: 5%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 8 2 7 22:00 3 193 192

A strong GRB was recorded by SWIFT on April 11, 2024 at 15:32:54 UT (#240211B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 14, 2024 at 02:20:36 UT (#240214A). An initial UVOT of V>19.60 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 06:26:53 UT (#240215A). An initial UVOT was not given to this GRB.

April 15, 2024

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 VI in Kimbe, New Guinea.

The last earthquake within about 250 km of this epicenter in New Guinea with

M>=6.5 occurred on May 14, 2019. At the time this summary noted:

"The strongest earthquake in the world today was an M 7.5-7.7 in the New Britain

region of Papua New Guinea. NEIC reported it was felt with maximum intensity VII

in Rabaul, New Britain and VI in Kokopo; V in Namatanai, New Ireland; IV in Arawa, Solomon Islands and II-III in Kavleng, New Ireland and within about 500 km of the epicenter.

It was also reported felt with moderate to strong intensity in Port Vila, Lihir Island, Bougainville, Port Moresby with power blackouts in the

Kokopo area. PTWC issued a tsunami warning but this was later withdrawn. Villagers

near the epicenter on the west coast of New Ireland reported seeing the ocean

recede but no damaging waves were recorded. Damage did occur in New Britain but

immediate reports are unclear as to how great it was. This is the strongest

earthquake in the world during the year 2019 to date. An M 7.5 hit the region of Ecuador

on February 22, 2019, the largest previous during this year. This earthquake

was simultaneous with the strongest geomagnetic storm since August 26, 2018 when AP reached 76." (May 14, 2019)

NEIC reported this earthquake of M 3.3 in Western Texas was felt with intensity up to IV in the area(s) of Western Texas in Whites City, New Mexico.

NEIC reported this earthquake of M 4.8 in Guatemala was felt with intensity up to IV in the area(s) of Guatemala in Gomera.

EMSC reported moderate shaking in Guatemala at Aldea Santo Tomas Milpas Altas, Condominio Cristalinas, Mixco, Colonia El Amparo.

NEIC reported this earthquake of M 4.6 in Ecuador was felt with intensity up to III in the area(s) of Ecuador in Jipijapa.

EMSC reported strong shaking in Ecuador at Salango, Santa Elena.

NEIC reported this earthquake of M 2.7 in Italy was felt with intensity up to III in the area(s) of Italy in Bacoli.

NEIC reported this earthquake of M 3.7 in Southern Italy was felt with intensity up to III in the area(s) of Southern Italy in Pozzuoli, Napoli, Quarto.

NEIC reported this earthquake of M 4.8 in Xinjiang, China was felt with intensity up to III in the area(s) of Xinjiang, China in Kazakhstan at Almaty, Zhetigen auyldyq okrug, and in Bishkek, Kyrgyzstan.

NEIC reported this earthquake of M 4.6 in Peru was felt with intensity up to III in the area(s) of Peru in Lima, Miraflores, Chorrillos, San Juan de Miraflores, Santiago de Surco.

No Tropical cyclones are currently active

GEOMAGNETIC FIELD: minor storms April 15 unsettled April 16 quiet April 17. Solar M-flare chance: 45% X-class: 5% proton storm: 1%

AP Indicies (global, high, mid-latitude, time of max AP, Max AP, Sunspot Number, Radio Flux) 6 3 5 12:00 2 152 178

A strong GRB was recorded by SWIFT on April 11, 2024 at 15:32:54 UT (#240211B). An initial UVOT was not given to this GRB.

A strong GRB was recorded by SWIFT on April 14, 2024 at 02:20:36 UT (#240214A). An initial UVOT of V>19.60 was given to this GRB.

A strong GRB was recorded by SWIFT on April 15, 2024 at 06:26:53 UT (#240215A). An initial UVOT was not given to this GRB.

Updates

Print Sitemap

Web View Mobile View

Logout Edit page