- Earthquake summary

October 8, 2024

DO SOLAR ECLIPSES TRIGGER EARTHQUAKES?

Many geoscientists have claimed over the years that there is no relation between

solar eclipses and subsequent moderately strong to strong earthquakes along

the path of the total eclipse. This summary, using data, has come to a different

conclusion. The current condition is a case in point. An annular solar eclipse

occurred over the Pacific Ocean on October 2, 2024. It was described in this

summary at the time as:

"The new moon will arrive on October 2, 2024 at 18:49. This involves a total annular eclipse of the sun of long duration - up to nearly 8 minutes - which will begin in the northern Pacific reaching maximum at 21S 114W and ending in southern South America and the South Sandwich Islands. Several active seismic areas are located along the path of the eclipse including a series of sites on the East Pacific Rise and the West Chile Rise and the Falkland and South Sandwich Islands. These are the most likely to see strongly enhanced seismicity with this eclipse. Longitudes which are at local solar noon at this time are near 120 West while those at local solar midnight area near 60 East. These include areas of western North America and the East Pacific in the west and central Asia including Afghanistan, Pakistan and Iran. 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 strong earthquake associated with this new moon is considered possible in the next week by this report. Minor to moderate seismic enhancement is also possible along the Pacific-North American plate boundary in the next week." (October 1-7, 2024)

The largest earthquakes of the past two days occurred in the Pacific area under the

path of this eclipse. A moderate strong earthquake of M 5.7 occurred today

in the area of Easter Island in the South Pacific at an epicenter which saw

the eclipse on October 2. In fact, many of us have enjoyed a series of pictures

of the eclipse on the web taken by members of a large crowd that watched the eclipse from

Rapa Nui (Easter Island). The last earthquake within about 200 km of today's

Easter Island earthquake with M>=5.7 occurred as an M 6.3 on December 18, 2018 and as an M 5.8 on August 16, 2012.

At the time of that event this summary noted:

"The strongest earthquaek of the day was an M 5.7 in the area southeast of

Easter Island in the southeastern Pacific. This is the strongest earthquake

within 500 km of this epicenter since an M 5.9 on December 5, 2010 about

200 km to the west of this epicenter. The last event within 100 km occurred

on November 29, 2007 with M 6.3." (August 16, 2012)

and

"A strong earthquake of M 6.2 occurred south of Easter Island today on the East Pacific Rise. NEW reported it may have been felt in some territories of Chile.

The last earthquake within about 300 km of this epicenter to reach M 6.4 or greater was an M

on May 29, 1997, the only such event in the region in at least 30 years." (December 19, 2018)

Today's event in the Easter Island area was preceded yesterday by an M 5.6 more than

2000 km to the north in the East Pacific Rise. In the previous issue this

event was addressed as:

"The largest earthquake in the world today was an M 5.6 in the East Pacific Rise.

This earthquake occurred near local solar noon as the CME from the X-class flares

of early October made their first effects on the geomagnetic field (NOAA data)

and was probably promoted by this change in the geomagnetic field strength. NEIC reported it may have been felt in the epicentral area. This event occurred near the location of the greatest duration of the eclipse

(23S 112W) and the greatest eclipse (21S 114W) of October 2 (NASA data).

It is highly likely this event was promoted by stresses associated with that

Solar eclipse. This earthquake at 14S 111W is the largest within about 300 km

of this epicenter since a similar M 5.6 on February 10, 2021 and the largest

event in the region in the past 35 years - an M 5.9 on July 7, 2015. In total

six earthquake of M>=5.6 have occurred in the area in the past 35 years.

At the time of the event of February, 2021, this summary noted:

"The strongest earthquake in the western hemisphere today was an M 5.6 in the

Central East Pacific Rise. It was not reported felt in this remote epicentral area.

This is the largest earthquake within about 300 km of this epicenter since an M 5.9

on July 7, 2015 and a similar M 5.7 on August 13, 2008. There have been no

earthquakes of M>=6.0 in the aea in the past 30 years. The earthquake occurred

within about an hour of local solar midnight and may have been promoted by

strong tidal stresses associated with the new moon." (February 10, 2021)

These two events are consistent with tidal triggering by the solar eclipse of

October 2.

A strong geomagnetic storm occurred today with AP 55 and high latitude AP at 67. This

is the strongest storm since September 17, 2024 when planetary AP reached 71.

This storm is expected to continue for another day. Enhanced seismicity

associated with this storm is expected to maximize around October 10-12 with

a strong to major earthquake likely at that time. The storm reached maximum around 10:00-12:00 on

October 7 and is likely to enhance seismicity near the Greenwich Meridian

and the International Date line, the same areas which have seen strongly

enhanced seismicity from the X7.1 and X9.0 flares of early October. Such

seismicity is expected to continue and an M 5.7-5.8 today in the Kermadec

Islands, New Zealand at local solar noon and near the peak of this storm appears to confirm this expectation.

A series of earthquakes of M 4.3-5.0 also occurred today sub-solar to the storm in

the Andreanof Islands, Alaska and was probably promoted by the geomagnetic storm.

An X2.1 solar flare occurred about the time the Andreanof Islands swarm began.

This flare occurred with the following SWPC parameters:

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

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

7180 1902 1913 1931 X2.1 (October 7, 2024) 2.5E-01

STRONG QUAKE IN SULAWESI, INDONESIA

EARTHQUAKE SUMMARY FOR SEPTEMBER 23, 2024

The strongest earthquake in the world today was an M 6.0 in Sulawesi, Indonesia. NEIC reported it was felt with intensity IV in Sulawesi at Luwuk. BMG reported this earthquake with M 6.4 at 0.1S 122.9E was felt in the Gorontalo area of Sulawesi among others. The last earthquakes of M>=6 in Sulawesi within about 200 km of today's epicenter occurred on January 18, 2023 with M 6.0 and prior to that an M 6.2 on July 26, 2021. On January 18, 2023 this summary noted in this regard:

"The largest earthquake in the world today was an M 6.3 in the Molucca Sea south

of the Talaud Islands, Indonesia. It was reported felt lightly in the epicentral

area. The last earthquake of larger magnitude within about 200 km of this epicenter in the Molucca Sea was an M 7.1 on November 14, 2019." (July 10, 2021)

Forecast 166142 had expected today's event within about 100 was likely around

September 26.

O: 23SEP2024 19:51:03 0.1S 122.8E MW=6.0 EMSC SULAWESI, INDONESIA

P: 26SEP2024 166142 1.0S 122.0E 4.0-5.4 BAAAA Sulawesi area

A moderately strong earthquake of M 5.6-5.7 also occurred today in the region of the Izu Islands, Japan. A tsunami alert was issued but was quickly withdrawn as not waves were observed. This earthquake as Tropical Storm Pulasan passed near this epicenter near Torishima Island. Strong floods in the wake of Pulasan have been occurring causing thousands to be evacuated. Parameters for this storm were at the time in the previous issue of this summary:

"TROPICAL STORM PULASAN (15W)

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

TS PULASAN 2024-09-23 00:00 UT 34.0N 138.9E 45 kts West of Honshu, Japan

TS Pulasan continued today with winds up to 45 kts West of Honshu Japan. It is expected to track to the east over the next two days and to make landfall ... on September 22-23 in western Honshu, Japan. Seismicity in southern Japan is expected to be enhanced as this storm passes through the area." (September 22-23, 2024)

Today's earthquake in the Izu Islands is the strongest in that region since an M 6.1 on October 6, 2023. At the time this summary noted:

"The largest earthquake in the world today was an M 6.1 in the Izu Islands, Japan. It was reported by NEIC to have been felt with light intensity in Saitama, Japan. It was accompanied by moderately large quakes of M 5.8, 4.2, 5.5, 5.6 and 5.6. This follows a long run-up to this swarm over the past week. This was noted in the previous issue of this summary as:

"Moderate earthquakes also continued today in the Bonin and Izu Islands of Japan today. The largest of these today were M 5.0-5.1. These events had been noted in previous issues of this summary as:

"The earthquake of M 5.7 in the Izu Islands, Japan was followed by an M 4.7 three hours later. It follows a series of such events in the area including an M 5.8 on September 19. At the time this summary noted:

"An M 5.8 also occurred in the Izu Islands south of southeastern Honshu, Japan today. A similar M 5.8 occurred on February 5, 2023 and an M 6.3 in the Izu Islands was recorded on January 16, 2023...." (October 4, 2023)

Forecast 166228 had expected enhanced seismicity in the Izu Islands within about

200 km of this epicenter was likely around September 22.

O: 23SEP2024 23:14:22 31.6N 140.0E MW=5.6 EMSC IZU ISLANDS, JAPAN REGION

P: 22SEP2024 166228 30.0N 142.0E 4.0-5.4 ABBAA Off East Coast Honshu

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: 23SEP2024 09:22:00 21.2N 100.1E ML=4.0 EMSC MYANMAR-CHINA BORDER REGION

P: 23SEP2024 166183 26.0N 101.0E 4.0-5.8 ACAAA Myanmar

O: 23SEP2024 19:04:05 21.3N 89.5E ML=4.2 EMSC NEAR THE COAST OF BANGLADESH

P: 24SEP2024 166183 20.0N 96.0E 4.0-5.4 ABCAA Myanmar

O: 23SEP2024 11:20:21 41.4N 84.0E MB=4.5 EMSC SOUTHERN XINJIANG, CHINA

P: 23SEP2024 166274 41.0N 78.0E 4.0-5.4 AACAA Kirgizstan/Xinjiang

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 23SEP2024 19:51:03 0.1S 122.8E MW=6.0 EMSC SULAWESI, INDONESIA

P: 26SEP2024 166142 1.0S 122.0E 4.0-5.4 BAAAA Sulawesi area

O: 23SEP2024 20:45:23 4.5S 102.7E MB=4.8 EMSC SOUTHERN SUMATRA, INDONESIA

P: 22SEP2024 166140 5.0S 103.0E 4.0-5.4 AAAAA So. of Sumatera

O: 23SEP2024 23:53:57 7.7S 106.9E ML=4.3 EMSC JAVA, INDONESIA

P: 22SEP2024 166139 8.0S 108.0E 4.0-5.4 AAAAA So. of Java

O: 23SEP2024 19:39:09 7.8N 127.3E ML=4.3 EMSC PHILIPPINE ISLANDS REGION

P: 18SEP2024 116121 8.0N 127.0E 4.0-5.4 BAAAA Halmahera

O: 23SEP2024 16:19:10 10.6S 113.4E MB=4.5 EMSC SOUTH OF JAVA, INDONESIA

P: 22SEP2024 166138 9.0S 114.0E 4.0-5.6 ABAAA So. of Bali

O: 24SEP2024 02:32:37 13.3N 119.8E ML=4.1 EMSC PHILIPPINE ISLANDS REGION

P: 22SEP2024 166158 12.0N 121.0E 3.5-4.9 ABAAA Luzon, Philippines

EMSC reported this earthquake of M 4.1 in Luzon, Philippines was felt with intensity up to II in the area(s) of Luzon, Philippines in Puerto Galera.

O: 23SEP2024 23:41:10 19.7N 120.6E MB=4.5 EMSC BABUYAN ISL REGION, PHILIPPINE

P: 24SEP2024 166159 19.0N 120.0E 3.5-5.1 AAAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 24SEP2024 04:30:30 8.6N 83.0W ML=4.1 EMSC PANAMA-COSTA RICA BORDER REGIO

P: 23SEP2024 166118 7.0N 82.0W 3.5-5.1 ABAAA Costa Rica

O: 23SEP2024 14:37:49 13.5N 90.9W MB=4.1 EMSC OFFSHORE GUATEMALA

P: 27SEP2024 166154 14.0N 92.0W 3.5-5.2 BAAAA Guatemala

O: 23SEP2024 07:52:17 13.8N 92.7W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

O: 23SEP2024 14:17:10 14.6N 92.2W ML=4.1 EMSC GUATEMALA

O: 23SEP2024 16:21:32 14.9N 93.5W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 24SEP2024 166154 15.0N 92.0W 3.5-5.2 AAAAA Guatemala

O: 24SEP2024 03:24:26 16.0N 98.5W ML=4.3 EMSC OFFSHORE OAXACA, MEXICO

P: 24SEP2024 166166 15.0N 98.0W 3.5-5.1 AAAAA Oaxaca, Mexico

O: 23SEP2024 17:59:13 16.3N 62.0W MB=4.4 EMSC GUADELOUPE REGION, LEEWARD ISL

P: 22SEP2024 166156 16.0N 61.0W 3.0-5.1 AAAAA Leeward Islands

EMSC reported this earthquake of M 4.2 in Guadeloupe was felt with intensity up to II in the area(s) of Guadeloupe in Petit-Bourg and Baie-Mahault.

O: 23SEP2024 10:11:26 16.6N 94.4W ML=4.0 EMSC OAXACA, MEXICO

P: 26SEP2024 166150 17.0N 95.0W 3.5-5.1 BAAAA Chiapas, Mexico

O: 23SEP2024 08:33:26 17.6N 64.8W MD=3.3 EMSC VIRGIN ISLANDS REGION

P: 24SEP2024 166175 20.0N 64.0W 3.0-4.8 ACAAA Bahamas/No. Caribbean

O: 23SEP2024 11:55:06 18.0N 65.4W MD=3.0 EMSC PUERTO RICO REGION

O: 24SEP2024 05:06:49 18.2N 66.9W MD=3.2 EMSC PUERTO RICO

O: 23SEP2024 09:20:40 19.2N 66.4W MD=3.3 EMSC PUERTO RICO REGION

P: 24SEP2024 166169 19.0N 66.0W 3.4-5.3 AAAAA Puerto Rico

O: 23SEP2024 11:39:22 20.0N 70.5W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

P: 22SEP2024 166176 20.0N 69.0W 3.0-4.7 AABAA Bahamas/No. Caribbean

O: 23SEP2024 07:49:20 23.0N 109.8W ML=3.8 EMSC BAJA CALIFORNIA SUR, MEXICO

O: 23SEP2024 19:19:47 23.0N 109.8W ML=3.0 EMSC BAJA CALIFORNIA SUR, MEXICO

P: 26SEP2024 166179 24.0N 109.0W 3.5-5.0 BAAAA Gulf of California

O: 24SEP2024 00:58:46 31.4S 65.7W MW=5.0 EMSC CORDOBA, ARGENTINA

P: 22SEP2024 166361 31.0S 69.0W 4.0-5.6 AACAA Central Chile

NEIC reported this earthquake of M 5.0 in Argentina was felt with intensity up to II in the area(s) of Argentina in Cordoba.

O: 24SEP2024 02:48:30 32.0S 66.9W ML=4.1 EMSC SAN LUIS, ARGENTINA

P: 23SEP2024 166362 33.0S 68.0W 4.0-5.8 AAAAA Central Chile

AFRICA AND EUROPE

NEIC reported an earthquake of M 5.0 in the Greenland Sea was felt with intensity up to II in the area(s) of the Greenland Sean Reine, Nordland, Norway.

EMSC reported this earthquake of M 3.9 in Western Turkey was felt with intensity up to IV in the area(s) of Western Turkey in Sakarya, Bahcelievler, Plevne,u lan, Taslitarla, Guzelyali.

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 23SEP2024 08:17:01 8.9S 158.1E MB=4.5 EMSC SOLOMON ISLANDS

P: 26SEP2024 166141 9.0S 158.0E 4.0-5.8 BAAAA Solomon Islands

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 24SEP2024 06:59:44 25.6S 116.0W MB=4.8 EMSC SOUTHERN EAST PACIFIC RISE

P: 21SEP2024 166355 25.0S 112.0W 4.0-6.1 BACAA So. East Pacific Rise

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

ZEALANDIA AND AUSTRALIA REGION

O: 23SEP2024 19:08:46 32.9S 179.8E MB=5.1 EMSC SOUTH OF KERMADEC ISLANDS

O: 23SEP2024 21:14:34 36.8S 177.5E MB=4.3 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 27SEP2024 166366 37.0S 178.0E 3.0-4.6 BAAAA North Island, N.Z.

JAPAN AND KURIL ISLANDS

O: 24SEP2024 00:38:04 29.7N 130.7E MB=4.6 EMSC RYUKYU ISLANDS, JAPAN

P: 21SEP2024 166216 30.0N 129.0E 3.5-4.9 BABAA Kyushu, Japan area

O: 24SEP2024 06:00:55 31.5N 139.8E mb=4.6 EMSC IZU ISLANDS, JAPAN REGION

O: 23SEP2024 12:50:05 29.7N 142.1E MB=4.8 EMSC IZU ISLANDS, JAPAN REGION

P: 22SEP2024 166228 30.0N 142.0E 4.0-5.4 AAAAA Off East Coast Honshu

O: 23SEP2024 23:14:22 31.6N 140.0E MW=5.6 EMSC IZU ISLANDS, JAPAN REGION

P: 22SEP2024 166228 30.0N 142.0E 4.0-5.4 ABBAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 23SEP2024 10:27:29 31.4N 115.4W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

P: 21SEP2024 166236 32.4N 115.8W 2.5-4.6 AAAAA So. California

P: 24SEP2024 166235 31.9N 116.3W 2.5-4.5 AAAAA So. California

O: 23SEP2024 07:04:14 31.9N 116.7W ML=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 24SEP2024 166235 31.9N 116.3W 2.5-4.5 AAAAA So. California

O: 23SEP2024 11:48:51 33.9N 118.4W ML=2.7 EMSC GREATER LOS ANGELES AREA, CALI

P: 25SEP2024 166241 34.0N 118.7W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 2.9 in Los Angeles, California was felt with intensity up to IV in the area(s) of Los Angeles, California with intensity II-III in Los Angeles, El Segundo, Hawthorne, Inglewood, Culver City, Gardena, Lawndale, Manhattan Beach, Hermosa Beach, Redondo Beach, Marina del Rey and as far as Irvine, Ventura and Calimesa, California.

O: 23SEP2024 10:55:04 34.1N 117.5W ML=2.0 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 24SEP2024 05:41:55 34.0N 117.3W ML=2.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 23SEP2024 166242 34.1N 117.4W 2.5-4.8 AAAAA So. California

O: 23SEP2024 12:30:48 34.7N 119.1W ML=2.4 EMSC SOUTHERN CALIFORNIA

P: 23SEP2024 166241 34.3N 118.5W 2.5-4.4 AAAAA So. California

P: 23SEP2024 166244 35.3N 118.6W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 2.9 in Central California was felt with intensity up to II-III in the area(s) of Central California in Soledad, Salinas, San Luis Obispo.

O: 23SEP2024 16:28:58 35.7N 117.5W ML=2.0 EMSC SOUTHERN CALIFORNIA

P: 25SEP2024 166244 35.7N 118.1W 2.5-4.6 AAAAA So. California

O: 23SEP2024 07:12:59 36.6N 121.2W MD=2.8 EMSC CENTRAL CALIFORNIA

O: 23SEP2024 10:11:26 36.4N 121.0W MD=2.2 EMSC CENTRAL CALIFORNIA

P: 24SEP2024 166202 36.8N 121.3W 2.5-4.6 AAAAA Central California

NEIC reported this earthquake of M 2.9 in Central California was felt with intensity up to II-III in the area(s) of Central California in Coarsevold and Merced and possibly as far as San Jose.

O: 23SEP2024 20:10:28 36.9N 120.1W MD=2.8 EMSC CENTRAL CALIFORNIA

P: 22SEP2024 166195 37.3N 119.4W 2.5-5.1 AAAAA California/Nevada area

O: 24SEP2024 00:05:54 37.8N 114.9W ML=2.9 EMSC NEVADA

P: 26SEP2024 166219 37.3N 114.9W 2.5-4.5 AAAAA Nevada area

O: 23SEP2024 18:27:44 38.0N 118.5W ML=2.2 EMSC NEVADA

P: 24SEP2024 166195 38.0N 118.8W 2.5-4.8 AAAAA California/Nevada area

O: 23SEP2024 13:02:36 40.4N 122.1W MD=2.2 EMSC NORTHERN CALIFORNIA

O: 23SEP2024 08:13:50 40.7N 122.2W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 23SEP2024 166287 40.4N 122.2W 2.5-4.6 AAAAA Northern California

ALASKA

O: 24SEP2024 02:00:29 51.2N 179.0E ML=3.7 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 25SEP2024 166318 50.0N 178.0E 4.0-5.8 ABAAA Rat Islands

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 23SEP2024 12:44:58 51.8N 125.9W ML=3.0 EMSC BRITISH COLUMBIA, CANADA

O: 23SEP2024 12:44:58 51.8N 125.9W MB=3.0 ECAN OF BELLA COOLA 1, BC

P: 27SEP2024 166300 49.5N 127.2W 2.8-5.1 BCAAA Vancouver Island area

O: 22SEP2024 09:16:19 48.8N 128.7W MB=3.4 ECAN OF PORT HARDY, BC

P: 23SEP2024 166300 48.3N 128.5W 2.8-5.2 AAAAA Vancouver Island area

O: 21SEP2024 16:30:31 54.3N 133.9W MB=3.9 ECAN OF MASSET, BC

P: 24SEP2024 166310 53.0N 132.0W 3.0-4.9 BBBAA British Colombia

O: 21SEP2024 04:34:12 51.4N 130.9W MB=3.4 ECAN OF PORT HARDY, BC

O: 21SEP2024 09:55:53 51.5N 130.9W MB=3.2 ECAN OF PORT HARDY, BC

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 23SEP2024 23:22:31 31.6N 104.5W ML=2.3 EMSC WESTERN TEXAS

O: 24SEP2024 06:45:48 31.6N 104.1W ML=2.8 EMSC WESTERN TEXAS

O: 23SEP2024 23:18:38 31.6N 104.5W ML=2.3 EMSC WESTERN TEXAS

P: 23SEP2024 166231 31.6N 103.6W 2.0-4.2 AAAAA SW U.S.A

EMSC reported this earthquake of M 2.8 in Western Texas was felt with intensity up to II in the area(s) of Western Texas in Odessa.

O: 23SEP2024 10:14:15 32.4N 102.1W ML=2.8 EMSC WESTERN TEXAS

O: 23SEP2024 13:17:21 32.7N 100.7W ML=2.0 EMSC WESTERN TEXAS

P: 17SEP2024 116231 31.4N 101.8W 2.0-4.2 CAAAA SW U.S.A

EASTERN U.S./CANADA

O: 23SEP2024 22:13:45 28.9N 98.1W ML=3.3 EMSC SOUTHERN TEXAS

O: 23SEP2024 14:21:41 28.9N 98.2W ML=2.4 EMSC SOUTHERN TEXAS

P: 23SEP2024 166184 28.0N 97.0W 3.0-4.8 AAAAA Northern Mexico

O: 23SEP2024 11:47:07 35.0N 97.4W ML=2.4 EMSC OKLAHOMA

P: 22SEP2024 166250 35.0N 97.0W 2.0-4.1 AAAAA Southern Plains

O: 23SEP2024 12:29:08 45.5N 66.3W MB=1.5 ECAN OF GREENWICH, NB

P: 30SEP2024 166265 46.0N 66.0W 2.0-4.7 CAAAA E. of Maine

O: 22SEP2024 05:16:15 47.4N 70.4W MB=1.0 ECAN OF BAIE-SAINT-PAUL, QC

O: 21SEP2024 16:44:17 47.5N 70.0W MB=1.8 ECAN OF LA MALBAIE, QC

O: 22SEP2024 14:52:39 47.7N 70.1W MB=0.9 ECAN OF LA MALBAIE, QC

P: 22SEP2024 166275 47.0N 70.0W 2.0-4.3 AAAAA Maine

O: 22SEP2024 12:01:34 48.4N 92.5W MB=1.7 ECAN OF NEGUAGUON LAKE 25D, ON

HAWAII

O: 23SEP2024 20:02:53 19.3N 156.2W MD=3.0 EMSC HAWAII REGION, HAWAII

P: 24SEP2024 166155 19.9N 156.1W 3.0-4.4 AAAAA Hawaii

MODERATE QUAKES IN COQUIMBO, CHILE; WEST CHILE RISE; MAURITIUS

EARTHQUAKE SUMMARY FOR SEPTEMBER 22, 2024

The strongest earthquake felt in the world today was an M 5.4-5.5 in Coquimbo, Chile. NEIC reported maximum intensity V in Coquimbo with IV in La Serena and III in Illapel, Coquimbo with IV in Vallenar, Atacama and lesser shaking in Illapel, Coquimbo, Copiapo, Atacama, Qujilpue, Valparaiso and Santiago, Chile.

EMSC reported it with strong shaking in Coquimbo, La Serena, Paiguano, Ovalle, Quilpue, Cerro Navia, Chile. GUC reported the M 5.5 was felt with intensity VII in Atacama at Copiapo, Tierra Amarilla, Huasco, Vallenar, IV in Alto del Carmen, Freirina, III in Chanaral, Diego de Almagro, Caldera; in Coquimbo with VII in La Serena, VI in Coquimbo, La Higuera, Tongoy, Vicuna, V in Monte Patria, Ovalle, Rio Hurtado, Canela, IV in Illapel, Andacollo, Paiguano, Combarbala, Punitaqui, Salamanca, and III in Los Vilos, Chile. The last earthquake of M>=5.4 in Coquimbo within about 200 km of the M 5.4 today was recorded on February 14 and February 11, 2024 with M 5.4 and M 5.8.

An earlier, regional foreshock of M 5.0 was also felt in Valparaiso, Chile today. NEIC reported intensity up to IV in Valparaiso at Quillota, Vina del Mar, Valparaiso and II-III in Calera, Quilpue, Villa Alemana, San Felipe and in Santiago and Teno, Maule. EMSC reported strong shaking with this event in Chile at Los Vilos, Papudo, Cabildo, Salamanca, Puchuncavi, Putaendo, Concon, San Felipe, Vina del Mar, Llaillay, Limache, Olmue, Villa Alemana, Valparaiso, Quilpue, Casablanca, Cartagena, Independencia, Providencia, Santiago, Las Condes, Maipu, Nunoa, Macul, Calera de Tango, Chile. GUC reported the M 5.0 was felt with intensity V in Coquimbo at Canela, Los Vilos; IV in Illapel, Salamanca, Monte Patria, Ovalle, Punitaqui, Rio Hurtado, III in Andacollo, La Serena dn II in Combarbala and in Valparaiso with V in Quintero, and La Ligua and IV in Quillota, Valparaiso, Limache, Quilpue and III in San Antonio, San Felipe; with III in Santiago at Quilicura, El Monte, Macul; in O'Higgins at Rancagua, Mostazal and Machali.

Forecasts 166359 and 166361 had expected today's activity in Coquimbo was likely within about 100 km around September 24.

O: 23SEP2024 02:36:39 29.7S 71.2W MW=5.4 EMSC COQUIMBO, CHILE

O: 23SEP2024 02:36:39 29.7S 71.2W MW=5.5 GUC COQUIMBO, CHILE

P: 24SEP2024 166350 29.0S 72.0W 4.0-5.5 AAAAA Coast Central Chile

O: 22SEP2024 18:46:38 32.0S 71.4W MB=5.0 EMSC COQUIMBO, CHILE

O: 22SEP2024 18:46:38 32.0S 71.4W MB=5.0 GUC COQUIMBO, CHILE

P: 24SEP2024 166361 31.0S 71.0W 4.0-5.4 AAAAA Central Chile

An M 5.4 also was recorded near Mauritius and Reunion Islnds in the Indian Ocean today. It was not reported felt in this region. This earthquake occurred while a strong M- to X-class solar flare was beginning and was antisolar (local solar midnight) at the time of the quake and flare. Solar Flare Triggering is likely in this case. Following is the SWPC data for this flare.

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

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

2840 2112 2139 2205 M3.7 (September 22, 2024) 7.1E-02

O: 22SEP2024 20:42:37 17.3S 66.5E MW=5.4 EMSC MAURITIUS - REUNION REGION

The last earthquake of M>=5.4 within about 200 km of this epicenter in Mauritius

occurred with M 6.7 on May 12, 2021. At the time this summary noted:

"The strongest earthquake in the world today was an M 6.7 in the Mauritius-Reunion area in the South Indian Ocean. NEIC reported it was as far as 1000 km from the epicenter in Mauritius at Laimatie Flaco, Bois des Amourettes, Grand Port, Curepipe Plaines Wilheim, Quatre Bornes Paines Wilheim and in Antananarivo, Madagascar and at Male, Maldives. The last earthquake in the world of larger magnitude was an M 7.0 on March 20, 2021 off the coast of eastern Honshu. A smaller event off Honshu of M 6.7-6.8 occurred more recently on May 1, 2021. The only earthquake ever recorded of M>=6.7 within about 300 km of this epicenter was an M 6.6 on July 26, 2012. Today's earthquake is at the exact antipode of the eye of Tropical Storm Andres which is south of western Mexico at this time." (May 12, 2021)

An earthquake of M 5.4 also occurred on the West Chile Rise today. It was not reported felt in this remote area. The last earthquake of M>=5.4 in the West Chile Rise within about 200 km of today's epicenter was an M 5.6 on June 24, 2022.

Forecast 166370 had expected today's event within about 50 km was likely

around September 27.

O: 22SEP2024 08:43:08 41.4S 88.0W MW=5.4 EMSC WEST CHILE RISE

P: 27SEP2024 166370 41.0S 88.0W 4.0-5.6 BAAAA Chile Rise

The strongest earthquake in the U.S. or Canada today was an M 4.0 in Hawaii with the continuing eruption of Kilauea in that area. NEIC reported this event was felt with intensity II-III in Hawaii at Pahala, Naalehu, Captain Cook, Volcano, Holualoa, Pahoa, Hilo, Mountain View, Kealakekua, Kurtistown, Paauilo, Papaikou, Kailua Cona, Hakalau, Nonole (IV), Honomu, Papaaloa, Kamuela, Laupahoehoe, Waikoloa, Honokaa, Kapaau and Hawi. The last earthquake in Hawaii of M>=4 occurred on September 15, 2024 (M 4.3) and August 22, 2024 (M 4.7). On average 1-2 events of M>=4 hit Hawaii each month. The last significant earthquake of M>=5 in Hawaii was an M 5.7 on February 9, 2024. At that time this summary noted:

Naalehu, Mountain View (with loud 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) At the time of the October, 2021 event this summary noted:

Forecast 166155 had expected enhanced seismicity in Hawaii was likely around

September 24.

O: 22SEP2024 16:21:24 19.2N 155.5W ML=4.0 EMSC ISLAND OF HAWAII, HAWAII

P: 24SEP2024 166155 19.9N 156.1W 3.0-4.4 AAAAA Hawaii

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 22SEP2024 12:43:34 37.7N 57.3E MB=4.8 EMSC NORTHEASTERN IRAN

P: 22SEP2024 166225 37.0N 59.0E 3.8-5.2 AABAA No. Iran

NEIC reported this earthquake of M 4.8 in Northeastern Iran was felt with intensity up to V in the area(s) of Northeastern Iran in Khorasan at Esfaraian and IV in Bicnord and II in Sabzawar and in Asgabat, Turkmenistan.

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 22SEP2024 08:22:41 5.8N 127.2E MB=4.5 EMSC PHILIPPINE ISLANDS REGION

P: 25SEP2024 166120 4.0N 128.0E 4.0-5.4 BBAAA Halmahera

O: 23SEP2024 01:48:38 5.9N 124.5E ML=4.6 EMSC MINDANAO, PHILIPPINES

P: 24SEP2024 166121 2.0N 125.0E 4.0-5.4 ACAAA Mindanao, Philippines

O: 23SEP2024 02:47:54 7.8S 147.0E MB=4.7 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 27SEP2024 166134 6.0S 148.0E 4.0-5.4 BBAAA New Ireland

O: 23SEP2024 01:38:48 9.5S 111.2E ML=4.2 EMSC SOUTH OF JAVA, INDONESIA

P: 22SEP2024 166138 9.0S 114.0E 4.0-5.6 AACAA So. of Bali

O: 22SEP2024 23:51:51 22.0N 143.6E MB=4.5 EMSC MARIANA ISLANDS REGION

P: 29SEP2024 166189 23.0N 143.0E 4.0-5.5 CAAAA Volcano Islands

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 22SEP2024 07:21:35 6.8N 73.1W MB=4.3 EMSC NORTHERN COLOMBIA

P: 23SEP2024 166117 7.0N 73.0W 4.0-5.4 AAAAA Colombia

O: 22SEP2024 19:48:13 13.2N 89.6W MB=4.5 EMSC OFFSHORE EL SALVADOR

P: 21SEP2024 166151 13.0N 89.0W 3.5-5.5 AAAAA Coast of Central America

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 Antiguo Cuscatlan and Nuevo Cuscatlan, La Libertad.

EMSC reported moderate shaking in El Salvador at Mejicanos and Apopa.

O: 22SEP2024 15:10:58 13.6N 87.1W ML=4.0 EMSC HONDURAS

P: 21SEP2024 166151 13.0N 89.0W 3.5-5.5 AABAA Coast of Central America

O: 23SEP2024 05:52:22 16.5N 94.4W ML=4.0 EMSC OAXACA, MEXICO

O: 22SEP2024 22:07:28 15.3N 95.6W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 23SEP2024 03:36:05 16.6N 94.1W ML=4.1 EMSC OAXACA, MEXICO

P: 26SEP2024 166150 17.0N 95.0W 3.5-5.1 BAAAA Chiapas, Mexico

O: 22SEP2024 09:44:12 17.9N 66.8W ML=3.8 EMSC PUERTO RICO REGION

P: 24SEP2024 166169 19.0N 66.0W 3.4-5.3 ABAAA Puerto Rico

NEIC reported this earthquake of M 3.8 in Southern Puerto Rico was felt with intensity up to IV in the area(s) of Southern Puerto Rico in Guanica, San German and Ponce.

O: 23SEP2024 02:11:50 18.0N 104.6W ML=4.0 EMSC OFF COAST OF COLIMA, MEXICO

P: 26SEP2024 166160 19.0N 104.0W 3.5-5.3 BAAAA Michoacan, Mexico

O: 22SEP2024 13:10:00 18.5N 68.9W MD=4.0 EMSC DOMINICAN REPUBLIC

P: 22SEP2024 166176 20.0N 69.0W 3.0-4.7 ABAAA Bahamas/No. Caribbean

O: 23SEP2024 02:01:53 18.7N 101.3W ML=4.0 EMSC MICHOACAN, MEXICO

P: 22SEP2024 166160 17.0N 102.0W 3.5-5.1 ABAAA Michoacan, Mexico

O: 22SEP2024 19:42:33 19.5S 66.7W MW=4.9 EMSC POTOSI, BOLIVIA

P: 22SEP2024 166347 21.0S 68.0W 4.0-5.6 ABAAA Argentina

O: 22SEP2024 07:10:58 24.7N 109.2W ML=4.0 EMSC GULF OF CALIFORNIA

O: 22SEP2024 10:36:59 23.0N 109.8W ML=3.0 EMSC BAJA CALIFORNIA SUR, MEXICO

P: 26SEP2024 166179 24.0N 109.0W 3.5-5.0 BAAAA Gulf of California

O: 23SEP2024 02:36:39 29.7S 71.2W MW=5.4 EMSC COQUIMBO, CHILE

P: 24SEP2024 166350 29.0S 72.0W 4.0-5.5 AAAAA Coast Central Chile

O: 22SEP2024 10:57:36 31.9S 67.1W MB=4.5 EMSC SAN LUIS, ARGENTINA

P: 23SEP2024 166362 33.0S 68.0W 4.0-5.8 ABAAA Central Chile

O: 22SEP2024 18:46:38 32.0S 71.4W MB=5.0 EMSC COQUIMBO, CHILE

P: 24SEP2024 166361 31.0S 71.0W 4.0-5.4 AAAAA Central Chile

AFRICA AND EUROPE

O: 22SEP2024 18:27:44 37.8N 21.8E MB=4.3 EMSC SOUTHERN GREECE

P: 24SEP2024 166222 37.0N 22.0E 3.0-4.8 AAAAA No. Greece

O: 22SEP2024 09:50:25 40.3N 24.2E MB=4.8 EMSC AEGEAN SEA

O: 22SEP2024 08:47:25 40.3N 24.1E mb=4.3 EMSC AEGEAN SEA

P: 23SEP2024 166294 41.0N 26.0E 3.0-5.1 AABAA Romania/NW Turkey

P: 28SEP2024 166293 40.0N 24.0E 3.0-5.6 CAAAA Romania/NW Turkey

NEIC reported this earthquake of M 4.8 in Northern Greece was felt with intensity up to IV in the area(s) of Northern Greece in Karyai (V), and II-III in Ierissos, Sikea, Ayios Nikolaos, Metamorfosis, Staros, and Thasos.

EMSC reported strong shaking in Greece at Ammoulian Island, Lerissos, Xiropotamo, Sarti, Sykia, Lagonisi, Sithonia, Ormos Panmagias, Kalamitsi, Agia, Kyriaki, Totoni, Theologos, Potos, Stavros among others.

A foreshock of M 4.3 was felt with intensity up to IV in Greece at Xiropotamos and Potamia and II in Ouranopolis and Orestias.

EMSC reported moderate quake in Greece at Ammouliani with a strange noise, also at Sarti, Ierissos, Sykia, Karyes Agion Oros, Mount Athos, Nikiti, Theologos, Thasos, Serres and as far as Smolyan, Bulgaria.

O: 22SEP2024 12:23:13 44.5N 17.7E ML=4.2 EMSC BOSNIA AND HERZEGOVINA

P: 23SEP2024 166260 44.0N 18.0E 3.0-5.4 AAAAA Adriatic Sea

O: 22SEP2024 17:41:57 41.6N 48.2E MB=4.2 EMSC CAUCASUS REGION, RUSSIA

P: 21SEP2024 166224 36.0N 46.0E 3.8-5.5 ACBAA No. Iran

O: 23SEP2024 05:08:31 73.2N 6.6E MB=5.0 EMSC GREENLAND SEA

SOUTHWEST PACIFIC

O: 23SEP2024 04:27:50 9.9S 159.5E MB=4.5 EMSC SOLOMON ISLANDS

P: 26SEP2024 166141 9.0S 158.0E 4.0-5.8 BABAA Solomon Islands

NEIC reported this earthquake of M 4.5 in Solomon Islands was felt with intensity up to II in the area(s) of Solomon Islandsin Honiara, Guadalcanal.

O: 23SEP2024 03:07:40 26.1S 179.4E MB=4.9 EMSC SOUTH OF FIJI ISLANDS

P: 29SEP2024 166360 25.0S 179.0E 4.0-5.5 CBAAA Tonga/Fiji

O: 22SEP2024 23:11:06 20.6S 178.1W MB=4.7 EMSC FIJI REGION

P: 26SEP2024 166357 20.0S 176.0W 4.0-5.6 BABAA Tonga Islands

O: 23SEP2024 02:14:53 21.7S 179.0W MB=4.4 EMSC FIJI REGION

P: 29SEP2024 166358 23.0S 180.0W 4.0-5.4 CBAAA Tonga Islands

O: 23SEP2024 03:07:40 26.1S 179.4E MB=4.9 EMSC SOUTH OF FIJI ISLANDS

P: 29SEP2024 166360 25.0S 179.0E 4.0-5.5 CBAAA Tonga/Fiji

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 22SEP2024 20:42:37 17.3S 66.5E MW=5.4 EMSC MAURITIUS - REUNION REGION

O: 22SEP2024 08:43:08 41.4S 88.0W MW=5.4 EMSC WEST CHILE RISE

P: 27SEP2024 166370 41.0S 88.0W 4.0-5.6 BAAAA Chile Rise

ZEALANDIA AND AUSTRALIA REGION

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today.

JAPAN AND KURIL ISLANDS

O: 22SEP2024 21:53:30 35.1N 138.2E ML=3.9 EMSC EASTERN HONSHU, JAPAN

P: 24SEP2024 166207 33.0N 138.0E 3.5-5.0 ACAAA Central/So. Honshu Japan

O: 23SEP2024 06:53:44 43.5N 146.2E MB=4.5 EMSC KURIL ISLANDS

P: 22SEP2024 166269 43.0N 145.0E 3.5-5.5 AAAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 22SEP2024 21:58:02 30.7N 116.4W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 22SEP2024 22:04:44 30.7N 116.4W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 22SEP2024 21:08:21 30.7N 116.3W ML=3.3 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 24SEP2024 166235 31.9N 116.3W 2.5-4.5 ABAAA So. California

O: 23SEP2024 03:59:10 34.2N 117.4W ML=2.0 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 23SEP2024 06:27:58 34.1N 117.5W ML=2.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 23SEP2024 166242 34.1N 117.4W 2.5-4.8 AAAAA So. California

EMSC reported this earthquake of M 2.0 in Greater Los Angeles, California was felt with intensity up to IV in the area(s) of Greater Los Angeles, California at Colton.

O: 22SEP2024 09:11:21 34.2N 120.1W ML=2.1 EMSC SANTA BARBARA CHANNEL, CALIF.

P: 23SEP2024 166241 34.3N 118.5W 2.5-4.4 AABAA So. California

O: 22SEP2024 23:31:22 36.4N 121.0W MD=2.0 EMSC CENTRAL CALIFORNIA

P: 22SEP2024 166201 36.2N 120.8W 2.5-4.9 AAAAA Central California

O: 22SEP2024 20:15:04 40.6N 122.5W MD=2.2 EMSC NORTHERN CALIFORNIA

P: 23SEP2024 166287 40.4N 122.2W 2.5-4.6 AAAAA Northern California

ALASKA

O: 22SEP2024 11:05:11 52.7N 169.5W ML=3.4 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 23SEP2024 166312 52.4N 169.4W 3.5-5.2 AAAAA Fox Islands, Aleutians

O: 22SEP2024 17:11:46 53.4N 165.8W ML=3.8 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 26SEP2024 166312 52.3N 165.7W 3.5-5.0 BBAAA Fox Islands, Aleutians

O: 22SEP2024 14:27:04 60.2N 151.0W ML=4.0 EMSC KENAI PENINSULA, ALASKA

P: 23SEP2024 166325 61.1N 150.2W 3.2-5.1 AAAAA Central Alaska

NEIC reported this earthquake of M 3.9 in the Kenai Peninsula, Alaska was felt with intensity up to IV in the area(s) of the Kenai Peninsula, Alaska in Clam Gulch, Anchor Point, Cooper Landing, Anchorage, and Chugiak.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 22SEP2024 19:25:45 46.6N 119.8W ML=2.1 EMSC WASHINGTON

O: 23SEP2024 03:13:25 46.6N 119.8W ML=2.2 EMSC WASHINGTON

O: 23SEP2024 03:22:32 46.6N 119.8W ML=3.0 EMSC WASHINGTON

P: 25SEP2024 166301 47.7N 120.3W 2.0-4.1 ABAAA Washington state, U.S.

NEIC reported this earthquake of M 2.9 in Washington State was felt with intensity up to II in the area(s) of Washington State in Moxee, Zillah, Yakima, Kennewick, Snohomish and possible in Florence, Oregon.

ROCKY MOUNTAINS REGION

O: 22SEP2024 20:39:27 31.6N 104.5W ML=2.1 EMSC WESTERN TEXAS

O: 22SEP2024 22:42:46 31.6N 104.5W ML=2.2 EMSC WESTERN TEXAS

O: 22SEP2024 23:58:56 31.6N 104.5W ML=2.2 EMSC WESTERN TEXAS

O: 22SEP2024 08:48:13 31.7N 104.4W ML=3.5 EMSC WESTERN TEXAS

O: 23SEP2024 06:43:05 31.7N 104.4W ML=2.1 EMSC WESTERN TEXAS

O: 22SEP2024 09:35:15 31.6N 104.5W ML=2.0 EMSC WESTERN TEXAS

P: 23SEP2024 166231 31.6N 103.6W 2.0-4.2 AAAAA SW U.S.A

P: 27SEP2024 166231 32.5N 104.6W 2.0-4.1 BAAAA SW U.S.A

O: 23SEP2024 00:17:21 32.2N 102.0W ML=2.6 EMSC WESTERN TEXAS

P: 23SEP2024 166231 31.6N 103.6W 2.0-4.2 AAAAA SW U.S.A

EASTERN U.S./CANADA

No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.

HAWAII

O: 22SEP2024 16:21:24 19.2N 155.5W ML=4.0 EMSC ISLAND OF HAWAII, HAWAII

P: 24SEP2024 166155 19.9N 156.1W 3.0-4.4 AAAAA Hawaii

Further updates on Solar Flare and Gamma Ray Bursts and Solar Eclipse

effects likely to enhance global seismicity this week.

A second strong X-class solar flare occurred on October 3. This flare registered

initially as an X9.0 at 12:18 UT, making it the strongest

flare of the current solar active period. It follows an X7.1 on October 2, the

strongest solar since May, 2024 and the third strongest of the current solar

cycle. The most likely areas to see significant immediate SFE in terms of

seismicity from today's flare are near 180W and 0E which were at local solar

midnight and local solar noon respectively at the time of the flare - longitudes which include

the active areas of Tonga, Fiji, New Zealand and the Andreanof/Rat Islands in

the west and much of western Europe including Iceland and the Atlantic Ridge

in the east. The CME from this flare is likely to arrive in the earth vicinity

around October 6-7 and could enhance global seismicity beyond the influence

of the X7.1 on October 1. This summary will continue to attempt updates

as this importance activity continues. It is likely that a major or strong

earthquake will occur in the next five days triggered by a combination

of unusual and strong factors. An M 2.2 occurred of the coast of Los Angeles,

California in the San Pedro Channel as the flare was in progress. Preliminary data from SWPC for this flare follow.

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

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

XXXX 1208 1218 1227 X9.0 (October 3, 2024) 4.6E-01

October 2, 2024

A major solar flare of X7.1 class (#4540 and 4690) and radio blackout occurred today with the following

parameters (SWPC):

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

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

4690 2117 2131 2158 C8.7 (October 1, 2024) 1.7E-03

4540 2158 2220 2229 X7.1 (October 1, 2024) 5.2E-01

This is the second strongest solar flare recorded by SWPC in the current

solar cycle. An X8.7 was observed on May 14, 2024. The most energetic flare

affecting the earth in the past 10 years was an X9.3 on September 6, 2017.

At that time this summary noted:

"An X9.3 solar flare occurred today near UT noon. This is the largest flare in the

current solar cycle - at least 11 years and the eighth largest in the past 25 years. The last solar flare of X9.0 or higher

class occurred as an X9.0 flare on December 5, 2006. The last flare of higher class

occurred as an X17.0 on October 28, 2003; an X10 on October 29, 2003 and an X28.0 on November 4, 2003. Solar flares of this class

can have unexpected effects on global seismicity. A similar X-flare occurred

in conjunction with the Loma Prieta earthquake of October, 1989 in California.

One of the strongest solar flares in recent years occurred on March 11, 1989

with X20. This summary described the flare in October, 2003 as follows:

"A strong X-class flare occurred around 11:00 UT on October 28. This X18 solar flare is the strongest observed

during the current solar cycle. A seismic watch has been declared" (October 28, 2003)

and

"An extreme event in the geomagnetic field occurred today as the CME from

yesterday's X17-X18 solar flare hit at about 06-07UT on October 29. This summary

expects this to have strong repercussions on the seismicity of central Asia

and North and South America. Seismic watches currently in effect for these

areas have been extended through early November, 2003. The impact of this

CME caused the Kp value to raise from quiet to extreme storm within a few

minutes. This can have effects from causing strong free earth oscillations

to major effects on communications and power grids. The resulting electrical

disruptions in the ionosphere and in the earth can lead to triggered seismic

activity." (October 29, 2003)

The effects of this and the coming geomagnetic storm was published in this

summary before the X-class flares occurred in yesterday's issue as"

"The geomagnetic field is expected to see severe storm conditions for the next

two days. This is associated with particles from a series of M-class solar

flares over the past two days. Seismicity, delayed by several days, will probably

see several strong events associated with these geomagnetic storms. This is

emphasized in the "GEOMAGNETIC" section of this summary as:

"Triggering of strong seismicity from the severe geomagnetic storms

today and tomorrow is likely to be delayed due in part to proton storms which

along with the electron influx will disrupt ring currents and induced telluric

currents. This in turn, will probably dial down seismicity until the ring currents ..." (September 6, 2017)

Severe geomagnetic storms associated with this flare are expected by SWPC

to begin October 3 and peak October 4. This is likely to bring a strong

increase in the strongest global earthquake magnitudes at the start of

this storm and 3-4 days later.

Toward the end of this X-class flare, the strongest Gamma Ray Burst in over a year

was recorded by the Swift Array. Both may have been associated with each other

or to a third party source. SWIFT gives this GRB the following data:

A strong Gamma Ray Burst was recorded by SWIFT on October 2, 2024 at 00:50:22 UT (#241002A). A preliminary UVOT Magnitude was assigned to this GRB of V>19.8. The last GRB with UVOT of equal or greater value occurred on November 11, 2023 with UVOT V=19.85.

The new moon will arrive on October 2, 2024 at 18:49. This involves a total annular eclipse of the sun of long duration - up to nearly 8 minutes - which will begin in the northern Pacific reaching maximum at 21S 114W and ending in southern South America and the South Sandwich Islands. Several active seismic areas are located along the path of the eclipse including a series of sites on the East Pacific Rise and the West Chile Rise and the Falkland and South Sandwich Islands. These are the most likely to see strongly enhanced seismicity with this eclipse. Longitudes which are at local solar noon at this time are near 120 West while those at local solar midnight area near 60 East. These include areas of western North America and the East Pacific in the west and central Asia including Afghanistan, Pakistan and Iran. 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 strong earthquake associated with this new moon is considered possible in the next week by this report. Minor to moderate seismic enhancement is also possible along the Pacific-North American plate boundary in the next week.

Earthquakes of M 4.0 and M 3.4 occurred today in Central California near Avenal. NEIC reported the M 4.0 was felt with intensity IV in Avenal and II-III in Coalinga, Corcoran, Exeter, Oxnard, Claremont, Santa Ana and in Glenbrook and Sparks, Nevada.

EMSC reported a jolt at Avenal and light shaking in Merced, California. This epicenter is located along the longitude of maximum Tidal Stress with the new moon of October 2

as reported in previous issues of this summary and may have been promoted by

tidal stresses which are high with this eclipse and new moon. This summary had

noted this in previous issues as:

The M 4.0 in central California also occurred shortly after the end of a major

solar flare (see above) and may have been promoted by SFE associated with that flare.

An M 3.5 also was widely felt in Los Angeles, California today. NEIC reported it was felt with maximum intensity in Southern California at Ontario, and II-III in Rancho Cucamonga, Chino, Mira Loma, Montclair, Upland, Chino, Pomona, Claremont, Norco, Fontana among others and as far as Ludlow and Twentynine Palms, around 150 km from the epicenter.

EMSC reported a strong thud and shake in California at Ontario, with lesser shaking in Rancho Cucamonga, Mira Loma, Eastvale among others.

The strongest earthquake in the world today was an M 6.6 in Tonga. NEIC reported it was felt with intensity III in Tonga at Pangai Ha'apai and II in Nuku'alofa, Tongatapu, Tonga.

This is the strongest earthquake in the world in the past month. An M 6.9 hit

in Tonga on August 26, 2024, the last comparable earthquake in the world.

No tsunami was expected nor observed with this earthquake.

The second largest earthquake in the world today was an M 6.1 in the Banda Sea of Indonesia. NEIC reported it was felt with intensity II in Sulawesi at Bau Bau and in western and northern Australia with intensity II in Coonawarra and Broome.

BMG reported this event with M 6.2 with intensity III in Kab. Alor at Barat Daya and Timur; in Muma. Bitpm. Walptpbo. Bau Bau , Mduga and Maluku with lesser shaking in Kar Timor, Belu, Alor, Flores, Sikka, Lembata, Morowali, Gowa, Wajo and Konawe among others.

The third largest earthquake in the world today was an M 5.9-6.0 in Luzon, Philippines.

EMSC reported moderate shaking in Naga City, Philippines for about 10-15 seconds. This event occurred at the beginning of the X7.6 solar flare and may have been promoted

by SFE associated with that flare. PHIVOLCS reported intensity IV in Virac, Catanduanes and III in Gatchitorena, Cabusao, Ragay, Gainza, Goa and Lagonoy, Camaries Sur; Palapag, Laoang, Pambuja, San Roque, and Mondragon, Northern Samar and I-II in Camarines Norte, Northern and Central Samar and in Sorsogon, Philippines.

The fourth largest earthquake in the world today was an M 5.5 in the Southern Atlantic Ocean.

This is an unusually large event for the region. No earthquakes within about

300 km of this epicenter have had significantly larger magnitudes in the

past 25 years. The last events near M 5.5 in the area occurred on June 9 and April 9, 2023.

When a slightly larger M 5.9 occurred on May 24, 2020 this summary noted:

"The strongest seismicity in the world today occurred in the mid-Ocean Ridges. These

events are not generally felt in these remote areas and thsee were no ecxeption ot this rule. The strongest today was an

M 5.9 in the Southern Mid-Atlantic Ridge. This is the largest quake within about

200 km of this epicenter since an M 6.0 twenty years ago on October 21, 2000, the only other such event in the area in the past 30 years.

The quake occurred near local solar midnight and could have been promoted

by tidal stresses associated with the new moon." (May 24, 2020 - note the new moon referred to occurred on May 22, 2020)

Today's earthquake occurred about 15 minutes after the strongest GRB (See above) in more than a year

was registered. It is possible effects from that GRB along with the X7.1

flare several hours earlier helped mobilize this earthquake at this time.

This event occurred near local solar midnight - a time when solar, GRB and

Tidal stresses are most geo-effective.

It occurred in an area of the South Atlantic where the solar eclipse will be

winding down later today (as noted in the tidal forecast above).

TYPHOON PULASAN TRIGGERS ANTIPODAL M 6.0 IN ARGENTINA

EARTHQUAKE SUMMARY FOR SEPTEMBER 21, 2024

The strongest earthquake in the world today was an M 6.0 in northern Argentina. NEIC reported it was felt with intensity IV in Alta Garcia, Cordoba and in La Rioja, Argentina with intensity II-III reported in Argentina at San Juan, San Martin and Mendoza, Cordoba and in Chile in Santiago, Vina del Mar, Valparaiso, La Serena, Coquimbo. EMSC reported strong shaking in Argentina at Las Heras, Mendoza, Chilecito, and in Chile at Vitacura, and Puchuncabi. This epicenter lies near the antipode of Eastern China where a Tropical Storms (17W and Pulasan) made landfall about the same time today.

"TS Pulasan continued today with winds up to 40 kts over Eastern China. It is expected to track to the northwest over the next two days and to make landfall ... on September 19-20. Seismicity in southern Japan is expected to be enhanced as this storm passes through the area." (September 21, 2024)

and

"TS 17W continued today with winds up to 50 kts near the coast of China. It is expected to track to the west making landfall around September 21 near Singapore, the second such event in this area in the past two weeks (Typhoon Yagi) did so on September 6 and helped trigger an M 5.7 at the antipode in Bolivia and Argentina. The same could occur with today's landfall. A series of earthquakes also followed the landfall or Yagi in eastern China and these could recur in the next several days." (September 20, 2024)

Today's antipodal activity in South America with a strong ocean storm hitting

China mirrors activity earlier this month as related in this summary at the time:

"The strongest earthquake in the world today was an M 5.7 in Bolivia. NEIC reported it was felt with intensity up to III in Bolivia at Challapata and in Iquique, Tarapaca, Chile. EMSC reported light motion in Alto Hospicio, Chile.

This epicenter in Bolivia is at the exact antipode of the landfall of Typhoon Yagi on the coast of Vietnam and China today (see WEATHER section below). Compare for antipodality landfall of Yagi at 19N 113E with this earthquake in Bolivia of M 5.7 at 19S 67W. The two events occurred simultaneously and a clear triggering effect is observable in this case." (September 6, 2024)

Today's earthquake in San Luis, Argentina is the strongest recorded within about 200 km of this epicenter since an M 6.3 on February 2, 2015. The only other such event in the past 35 years of M>=6.0 in this region was an M 6.2 on September 17, 2006. At the time of the event of M 6.3 on February 2, 2015 this summary noted:

"The strong earthquake of M 6.3-6.4 off the coast of Chile and Argentina was felt in Argentina with intensity IV in San Juan and II-III in Pergamino, Cordoba, La Rioja, Mendoza, San Rafael, and San Luis. It was felt in Chile with intensity II-III in Copiapo, Coquimbo, Vicuna, Graneros, Machala, Rancagua,

Valdivia, Lampa, Melipilla, Puente Alto, San Bernardo, Santiago, La Ligua, Quilpue, Valparaiso and Vina del Mar in the regions of Valparaiso, Metropolitana, Los Lagos, O'Higgins, Coquimbo, and Atacama, Chile. This is the strongest earthquake within 200 km of this epicenter in at least 25 years. The last and only event in the past 25 years in this area of M>=6 occurred on September 17, 2006 with M 6.2." (February 2, 2015)

Forecast 166361 had expected this event in this region was likely around September 22.

O: 21SEP2024 21:24:28 31.9S 66.9W MW=6.0 EMSC SAN LUIS, ARGENTINA

P: 22SEP2024 166361 31.0S 69.0W 4.0-5.6 AABAA Central Chile

The strongest earthquake in the U.S. or Canada today was an M 5.4 in the western Andreanof Islands, Aleutians, Alaska. NEIC reported it was felt with intensity III in Adak, Alaska. This is the strongest earthquake in the Andreanof Islands since an M 6.1 on December 21, 2023 and the strongest in the western Andreanof Islands since an M 6.4-6.7 on October 16, 2023. At the time this summary noted:

This event occurred within minutes of local solar midnight and was probably promoted by the new moon and solar eclipse of October 14 which began near this epicenter as noted in this and previous issues of this report:

...

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)

Forecast 166306 had expected today's event about 50 km to th west was likely

around September 22.

O: 21SEP2024 17:21:20 51.3N 178.5W MW=5.4 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 22SEP2024 166306 51.7N 179.7W 3.5-4.9 AAAAA Andreanoff Isls, Aleutians

A series of light earthquakes in South Island New Zealand of M 3.0-3.5 occurred today. These began with an M 3.5 near local solar midnight and conclude with a pair of M 3.0 quakes near local solar noon. They coincided with a C1.6 class solar flare and the events near local solar midnight continued throughout the flare output. It is likely they were promoted by the SFE from this event as well as tidal stresses which maximize near this hour.

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

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

2600 1335 1341 1346 C1.6 (September 21, 2024) 9.4E-04

South Island, New Zealand M 3.5, 3.5, 3.3 13:35-14:02 UT

O: 21SEP2024 23:41:10 43.9S 169.2E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 21SEP2024 23:42:34 43.9S 169.2E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 21SEP2024 13:35:30 45.3S 167.4E ML=3.5 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 21SEP2024 14:02:53 46.2S 165.9E ML=3.2 EMSC OFF W. COAST OF S. ISLAND, N.Z.

O: 21SEP2024 13:50:55 46.3S 166.7E ML=3.3 EMSC OFF W. COAST OF S. ISLAND, N.Z.

O: 21SEP2024 13:43:03 46.4S 166.0E ML=3.5 EMSC OFF W. COAST OF S. ISLAND, N.Z

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 21SEP2024 10:51:08 24.2N 121.7E MW=4.8 EMSC TAIWAN

P: 27SEP2024 166186 25.0N 123.0E 4.0-5.4 CAAAA Ryukyu Islands

NEIC reported this earthquake of M 4.8 in Taiwan was felt with intensity up to II-III in the area(s) of Taiwan in Taipei at Luchou, Sanchung, Yungho; in Taoyuan at Chungli an in Miaoli at Cholan.

EMSC reported moderate shaking in Taiwan at Shanzihding, Wanhua, Luzhu, Tamsui, Wuqi Districts of Taiwan.

O: 21SEP2024 16:58:12 31.8N 88.2E ML=4.1 EMSC WESTERN XIZANG

P: 25SEP2024 166259 30.0N 88.0E 3.8-5.2 BBAAA Xizang

O: 21SEP2024 14:42:43 36.1N 70.9E MB=4.5 EMSC HINDU KUSH REGION, AFGHANISTAN

O: 21SEP2024 23:20:58 37.1N 72.2E MB=4.0 EMSC TAJIKISTAN

P: 23SEP2024 166212 36.0N 71.0E 3.8-5.6 ABAAA Hindu Kush/Pakistan

O: 21SEP2024 23:58:45 37.6N 57.4E MB=4.7 EMSC NORTHEASTERN IRAN

O: 21SEP2024 23:51:49 37.6N 57.4E mb=4.3 EMSC NORTHEASTERN IRAN

P: 22SEP2024 166225 37.0N 59.0E 3.8-5.2 AABAA No. Iran

NEIC reported this earthquake of M 4.6 in Northeastern Iran was felt with intensity up to IV in the area(s) of Northeastern Iran in Bicnord, Khorasan, Shamali.

EMSC reported these earthquakes of M 4.5 and M 4.6 in Iran were felt with intensity up to IV in the area(s) of Iran in the epicentral area.

O: 21SEP2024 08:19:03 52.7N 105.8E MB=4.0 EMSC LAKE BAYKAL REGION, RUSSIA

O: 22SEP2024 05:50:10 53.3N 160.3E MB=4.3 EMSC NEAR EAST COAST OF KAMCHATKA

P: 22SEP2024 166311 52.0N 161.0E 4.0-5.5 ABAAA E. of Kamchatka

O: 21SEP2024 13:14:00 24.3N 141.4E MB=4.5 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 22SEP2024 166178 25.0N 142.0E 4.0-5.5 AAAAA Bonin Islands

O: 21SEP2024 15:57:50 31.2N 140.9E MB=4.4 EMSC IZU ISLANDS, JAPAN REGION

P: 22SEP2024 166228 30.0N 142.0E 4.0-5.4 ABAAA Off East Coast Honshu

INDONESIA AND PHILIPPINES

O: 21SEP2024 20:21:10 0.1N 110.1E ML=4.4 EMSC KALIMANTAN, INDONESIA

O: 22SEP2024 05:02:11 5.2S 131.1E ML=4.1 EMSC BANDA SEA

P: 27SEP2024 166146 4.0S 131.0E 4.0-5.4 BBAAA West Irian, PNG

O: 22SEP2024 02:49:55 5.7S 148.1E MB=4.1 EMSC NEW BRITAIN REGION, P.N.G.

P: 27SEP2024 166134 6.0S 148.0E 4.0-5.4 BAAAA New Ireland

O: 21SEP2024 11:13:55 6.0S 154.6E MB=4.3 EMSC BOUGAINVILLE REGION, P.N.G.

P: 28SEP2024 166133 6.0S 154.0E 4.0-5.6 CAAAA New Britain

O: 21SEP2024 20:23:01 6.2S 129.8E MB=4.1 EMSC BANDA SEA

O: 22SEP2024 06:27:09 6.6S 129.8E mb=4.0 EMSC BANDA SEA

P: 22SEP2024 166125 7.0S 128.0E 4.0-5.4 AABAA Banda Sea

O: 22SEP2024 00:46:07 7.1S 155.7E MB=4.8 EMSC SOLOMON ISLANDS

P: 22SEP2024 166141 8.0S 155.0E 4.0-5.5 AAAAA Solomon Islands

O: 22SEP2024 03:11:52 7.9S 109.7E ML=4.0 EMSC JAVA, INDONESIA

P: 22SEP2024 166139 8.0S 108.0E 4.0-5.4 ABAAA So. of Java

O: 22SEP2024 02:54:03 7.9S 158.3E MB=4.3 EMSC SOLOMON ISLANDS

P: 26SEP2024 166141 9.0S 158.0E 4.0-5.8 BBAAA Solomon Islands

O: 22SEP2024 06:16:40 9.5S 117.5E ML=4.2 EMSC SUMBAWA REGION, INDONESIA

P: 22SEP2024 166138 9.0S 114.0E 4.0-5.6 AACAA So. of Bali

O: 21SEP2024 18:42:21 10.5N 91.6E MB=4.3 EMSC ANDAMAN ISLANDS, INDIA REGION

O: 21SEP2024 16:41:36 10.6N 91.6E mb=4.9 EMSC ANDAMAN ISLANDS, INDIA REGION

P: 28SEP2024 166147 11.0N 92.0E 4.0-5.4 CAAAA Andaman Islands

CENTRAL AND SOUTH AMERICA

O: 21SEP2024 22:44:30 8.9N 83.0W ML=4.1 EMSC PANAMA-COSTA RICA BORDER REGIO

P: 23SEP2024 166118 7.0N 82.0W 3.5-5.1 ABAAA Costa Rica

O: 22SEP2024 02:25:43 13.2N 89.3W MW=5.2 EMSC OFFSHORE EL SALVADOR

P: 21SEP2024 166151 13.0N 89.0W 3.5-5.5 AAAAA Coast of Central America

NEIC reported this earthquake of M 5.1 in El Salvador was felt with intensity up to IV in the area(s) of El Salvador in Nuevo Cuscatlan, San Salvador and II in Concepcion, Batres Usulutan.

EMSC reported strong shaking in El Salvador at Nueva San Salvador, San Salvador, Mejicanos, San Pedro Perulapan, Santa Ana, Santa Maria, and in Guatemala at Colonia Vista Hermosa.

O: 21SEP2024 13:21:04 14.3N 93.1W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 24SEP2024 166154 15.0N 92.0W 3.5-5.2 BAAAA Guatemala

O: 22SEP2024 03:06:22 14.5N 60.7W ML=4.1 EMSC MARTINIQUE REGION, WINDWARD IS

P: 26SEP2024 166156 15.0N 60.0W 3.0-5.0 BAAAA Leeward Islands

EMSC reported this earthquake of M 4.1 in Martinique was felt with intensity up to IV in the area(s) of Martinique in Sainte-Anner, Le Vauclin, Ducos, Le Lamentin, Fort-de-France, Gros-Morne, and in Santa Lucia.

O: 21SEP2024 21:21:23 15.0N 94.1W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 24SEP2024 166165 15.0N 96.0W 3.5-5.5 BABAA Oaxaca, Mexico

O: 21SEP2024 23:13:36 16.7N 103.3W ML=4.0 EMSC OFF COAST OF MICHOACAN, MEXICO

P: 22SEP2024 166160 17.0N 102.0W 3.5-5.1 AAAAA Michoacan, Mexico

O: 21SEP2024 17:58:20 15.6N 95.1W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 21SEP2024 08:48:27 16.8N 95.1W ML=4.4 EMSC OAXACA, MEXICO

P: 22SEP2024 166167 17.0N 96.0W 3.5-5.1 AAAAA Oaxaca, Mexico

O: 21SEP2024 22:21:15 16.8N 100.6W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO

P: 22SEP2024 166168 17.0N 100.0W 3.5-5.5 AAAAA Oaxaca, Mexico

O: 22SEP2024 03:16:43 17.7N 67.9W MD=3.4 EMSC PUERTO RICO REGION

P: 27SEP2024 166169 19.0N 67.0W 3.4-5.1 BBAAA Puerto Rico

O: 21SEP2024 19:54:43 18.0N 101.2W MB=4.7 EMSC GUERRERO, MEXICO

P: 22SEP2024 166168 17.0N 100.0W 3.5-5.5 AAAAA Oaxaca, Mexico

NEIC reported this earthquake of M 4.6 in Guerrero, Mexico was felt with intensity up to II in the area(s) of Guerrero, Mexico in Tlalnepantla, Mexico.

EMSC reported moderate shaking in Guerrero also at Benito Juarez.

O: 21SEP2024 23:01:53 18.1N 68.4W MD=3.5 EMSC MONA PASSAGE, DOMINICAN REPUBL

P: 22SEP2024 166176 20.0N 69.0W 3.0-4.7 ABAAA Bahamas/No. Caribbean

O: 22SEP2024 02:46:22 17.9N 66.9W MD=3.1 EMSC PUERTO RICO REGION

O: 22SEP2024 06:48:10 17.9N 66.9W MD=3.4 EMSC PUERTO RICO REGION

O: 21SEP2024 07:19:30 18.8N 67.1W MD=3.1 EMSC PUERTO RICO REGION

O: 22SEP2024 05:40:16 18.5N 66.8W MD=3.0 EMSC PUERTO RICO REGION

P: 24SEP2024 166169 19.0N 66.0W 3.4-5.3 AAAAA Puerto Rico

O: 22SEP2024 03:37:05 27.3S 72.2W MB=4.4 EMSC OFF COAST OF ATACAMA, CHILE

P: 23SEP2024 166350 28.0S 71.0W 4.0-5.9 AAAAA Coast Central Chile

O: 21SEP2024 21:24:28 31.9S 66.9W MW=6.0 EMSC SAN LUIS, ARGENTINA

P: 22SEP2024 166361 31.0S 69.0W 4.0-5.6 AABAA Central Chile

O: 22SEP2024 01:32:23 32.0S 66.9W MB=4.1 EMSC SAN LUIS, ARGENTINA

P: 23SEP2024 166362 33.0S 68.0W 4.0-5.8 AAAAA Central Chile

O: 21SEP2024 17:44:08 44.3S 78.7W MB=4.4 EMSC OFF COAST OF AISEN, CHILE

P: 28SEP2024 166370 43.0S 83.0W 4.0-5.4 CBCAA Chile Rise

AFRICA AND EUROPE

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 22SEP2024 03:15:12 15.2S 173.0W MB=4.2 EMSC TONGA

P: 22SEP2024 166339 15.0S 174.0W 4.0-5.4 AAAAA Samoa Islands

O: 22SEP2024 01:35:21 17.8S 178.3W MB=4.1 EMSC FIJI REGION

O: 21SEP2024 19:52:31 18.1S 178.1W MB=4.2 EMSC FIJI REGION

P: 25SEP2024 166343 17.0S 177.0W 4.0-5.9 BBAAA Tonga Islands

O: 22SEP2024 01:33:01 18.4S 174.2W MB=4.0 EMSC TONGA

P: 24SEP2024 166344 19.0S 173.0W 4.0-5.5 AAAAA Tonga Islands

O: 22SEP2024 02:20:22 20.0S 177.5W mb=4.2 EMSC FIJI REGION

O: 21SEP2024 12:21:30 19.7S 177.8W MB=4.1 EMSC FIJI REGION

P: 26SEP2024 166357 20.0S 176.0W 4.0-5.6 BABAA Tonga Islands

O: 21SEP2024 20:07:23 21.9S 171.1E MB=4.2 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 24SEP2024 166352 22.0S 171.0E 4.0-5.4 BAAAA Loyalty Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 21SEP2024 23:41:10 43.9S 169.2E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 21SEP2024 23:42:34 43.9S 169.2E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 21SEP2024 13:35:30 45.3S 167.4E ML=3.5 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 21SEP2024 14:02:53 46.2S 165.9E ML=3.2 EMSC OFF W. COAST OF S. ISLAND, N.Z.

O: 21SEP2024 13:50:55 46.3S 166.7E ML=3.3 EMSC OFF W. COAST OF S. ISLAND, N.Z.

O: 21SEP2024 13:43:03 46.4S 166.0E ML=3.5 EMSC OFF W. COAST OF S. ISLAND, N.Z

JAPAN AND KURIL ISLANDS

O: 22SEP2024 05:25:02 25.2N 142.7E mb=4.2 EMSC VOLCANO ISLANDS, JAPAN REGION

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 21SEP2024 16:32:55 32.0N 116.9W ML=2.2 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 21SEP2024 15:31:00 31.5N 115.6W ML=2.8 EMSC BAJA CALIFORNIA, MEXICO

O: 21SEP2024 20:07:27 31.9N 116.6W ML=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 21SEP2024 166236 32.4N 115.8W 2.5-4.6 AAAAA So. California

P: 24SEP2024 166235 31.9N 116.3W 2.5-4.5 BAAAA So. California

EMSC reported this earthquake of M 2.1 in Baja California was felt with intensity up to IV in the area(s) of Baja California in Ensenada, Mexico.

O: 21SEP2024 12:23:32 33.7N 116.8W ML=2.2 EMSC SOUTHERN CALIFORNIA

P: 21SEP2024 166240 34.6N 116.7W 2.5-4.7 AAAAA So. California

O: 21SEP2024 21:15:21 34.1N 118.8W ML=3.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 23SEP2024 166241 34.3N 118.5W 2.5-4.4 AAAAA So. California

P: 25SEP2024 166241 34.0N 118.7W 2.5-4.4 BAAAA So. California

NEIC reported this earthquake of M 3.0 in Los Angeles, California was felt with intensity up to II-III in the area(s) of Los Angeles, California in Malibu, Agoura Hills, Westlake Village, Calabasas, Thousand Oaks, Oak Park, Newbury Park, West Hills, Canoga Park, Camarillo, Simi Valley, Santa Monica, Sherman Oaks, Los Angeles and as far as San Diego, California.

O: 21SEP2024 09:41:50 36.6N 115.7W ML=2.1 EMSC NEVADA

P: 26SEP2024 166219 37.3N 114.9W 2.5-4.5 BAAAA Nevada area

O: 21SEP2024 19:13:14 38.2N 117.7W ML=2.1 EMSC NEVADA

P: 24SEP2024 166195 38.0N 118.8W 2.5-4.8 BAAAA California/Nevada area

O: 22SEP2024 05:56:41 38.7N 118.6W ML=2.3 EMSC NEVADA

P: 24SEP2024 166196 38.6N 118.6W 2.5-5.0 AAAAA California/Nevada area

O: 22SEP2024 02:48:54 38.8N 122.8W MD=2.2 EMSC NORTHERN CALIFORNIA

P: 22SEP2024 166205 38.5N 122.7W 2.5-4.4 AAAAA Central California

O: 21SEP2024 10:51:18 40.3N 124.6W MD=2.3 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 22SEP2024 02:04:58 40.3N 124.6W MD=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 23SEP2024 166288 40.6N 124.9W 2.5-4.5 AAAAA Off Coast of No. Calif

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

O: 21SEP2024 14:46:44 41.9N 119.6W ML=2.7 EMSC NEVADA

P: 25SEP2024 166292 42.1N 120.3W 2.0-4.5 BAAAA Oregon state, U.S.

ALASKA

O: 21SEP2024 17:21:20 51.3N 178.5W MW=5.4 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 22SEP2024 166306 51.7N 179.7W 3.5-4.9 AAAAA Andreanoff Isls, Aleutians

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 21SEP2024 07:00:01 42.3N 124.6W ML=2.8 EMSC OFFSHORE OREGON

P: 23SEP2024 166288 40.6N 124.9W 2.5-4.5 ABAAA Off Coast of No. Calif

NEIC reported this earthquake of M 2.9 off the coast of Oregon was felt with intensity up to IV in the area(s) of Oregon in Crescent City, California and in Dallas, Oregon.

O: 21SEP2024 09:55:53 51.5N 130.9W ML=3.2 EMSC HAIDA GWAII REGION

P: 25SEP2024 166309 50.3N 130.2W 3.0-5.0 BBAAA British Colombia

O: 21SEP2024 16:30:31 54.3N 133.9W ML=3.9 EMSC HAIDA GWAII REGION

P: 24SEP2024 166310 53.0N 132.0W 3.0-4.9 BBBAA British Colombia

ROCKY MOUNTAINS REGION

O: 21SEP2024 18:32:06 31.6N 104.5W ML=2.2 EMSC WESTERN TEXAS

O: 21SEP2024 18:56:37 31.6N 104.6W ML=2.8 EMSC WESTERN TEXAS

O: 22SEP2024 01:45:47 31.7N 104.5W ML=2.1 EMSC WESTERN TEXAS

O: 21SEP2024 09:27:00 32.4N 102.1W ML=2.8 EMSC WESTERN TEXAS

O: 21SEP2024 09:00:42 31.6N 104.5W ML=2.0 EMSC WESTERN TEXAS

O: 21SEP2024 09:25:12 32.4N 102.1W ML=2.6 EMSC WESTERN TEXAS

P: 23SEP2024 166231 31.6N 103.6W 2.0-4.2 AAAAA SW U.S.A

NEIC reported this earthquake of M 2.9 in Western Texas was felt with intensity up to II in the area(s) of Western Texas in Tarzan.

O: 22SEP2024 02:56:35 44.3N 115.2W ML=2.7 EMSC SOUTHERN IDAHO

P: 24SEP2024 166277 44.6N 116.0W 2.0-4.3 AAAAA Montana/Idaho

P: 26SEP2024 166277 44.5N 115.2W 2.0-4.3 BAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 21SEP2024 15:16:19 28.6N 98.4W ML=2.9 EMSC SOUTHERN TEXAS

P: 23SEP2024 166184 28.0N 97.0W 3.0-4.8 AABAA Northern Mexico

NEIC reported this earthquake of M 2.9 in Southern Texas was felt with intensity up to II in the area(s) of Southern Texas near Austin.

HAWAII

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

MODERATE QUAKE IN NORTHERN KERMADEC ISLANDS, NEW ZEALAND

EARTHQUAKE SUMMARY FOR SEPTEMBER 20, 2024

It was a relatively quiet day in global seismicity today. The strongest earthquake of the day was an M 5.6 in the northern Kermadec Islands of New Zealand. A similar M 5.7 hit about 200 km north of this Kermadec Islands epicenter on September 18, 2024. At the time this summary noted:

"The largest earthquake of the day was an M 5.7 in the northern Kermadec Islands, New Zealand. It was not reported felt in this remote area. This event was not reported felt in this remote area. The last earthquake of M>=5.7 in the northern Kermadec Islands within about 200 km of today's epicenter was an M 6.2 on May 31, 2024 and an M 5.8 on March 20, 2022 – both about 150 km south of today's epicenter. At the time of the May, 2024 event this summary noted:

"A moderate M 5.2 occurred towards the end of this flare in the Kermadec Islands within minutes of local solar noon and may have been triggered by SFE associated with this flare. Two moderate aftershock of the M 6.2 mainshock in the Kermadec

Islands occurred within minutes of local solar noon and were probably promoted by energy associated with the full moon which maximize near this hour.

This is the strongest earthquake in the Kermadec Islands within about 200 km of this epicenter since an M 7.1 more than a year ago on April 24, 2023 about 150 km southwest of today's epicenter. At the time this summary noted:

"A major M 7.1-7.2 earthquake occurred at the height of this geomagnetic storm in the area of the Kermadec Islands, New Zealand. A tsunami of small height was possible with this earthquake but only locally. It was not reported felt

in this remote area. An M 6.9 in the Kermadec Islands of March 4, 2023 followed a major geomagnetic storm of February 27-28, 2023." (April 24, 2023, May 31, 2024))

Today's event of M 5.7 also occurred within minutes of local solar noon and was probably promoted by strong tidal stresses with today's full moon.." (September 18, 2024)

Forecasts 166368 and 166353 had expected today's event within about 50 km was likely in late September.

O: 21SEP2024 02:32:17 29.0S 176.6W MW=5.6 EMSC KERMADEC ISLANDS REGION

P: 21SEP2024 166368 31.0S 177.0W 4.0-5.7 ABAAA So. Kermadec Islands

P: 27SEP2024 166353 29.0S 176.0W 4.0-5.4 CAAAA No. Kermadec Islands

O: 20SEP2024 21:05:35 32.9S 177.2W MB=4.5 EMSC SOUTH OF KERMADEC ISLANDS

P: 21SEP2024 166368 31.0S 177.0W 4.0-5.7 ABAAA So. Kermadec Islands

P: 23SEP2024 166369 32.0S 179.0W 4.0-5.4 ABABA So. Kermadec Islands

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 20SEP2024 17:31:20 32.7N 58.3E MB=4.0 EMSC EASTERN IRAN

P: 22SEP2024 166225 37.0N 59.0E 3.8-5.2 ACAAA No. Iran

O: 20SEP2024 09:24:41 50.2N 105.4E ML=4.0 EMSC RUSSIA-MONGOLIA BORDER REGION

O: 21SEP2024 06:55:45 52.5N 105.9E ML=4.4 EMSC LAKE BAYKAL REGION, RUSSIA

P: 28SEP2024 166276 45.0N 102.0E 4.0-5.4 CCCAA Mongolia

EMSC reported this earthquake of M 4.5 in Lake Baykal, Russia was felt with intensity up to IV in the area(s) of Lake Baykal, Russia at Zelenyy, Irkutsk, and Shelekhov, Siberia.

INDONESIA AND PHILIPPINES

O: 20SEP2024 14:47:06 6.9S 155.4E MB=4.7 EMSC BOUGAINVILLE REGION, P.N.G.

P: 22SEP2024 166141 8.0S 155.0E 4.0-5.5 ABAAA Solomon Islands

P: 28SEP2024 166141 7.0S 155.0E 4.0-5.4 CAAAA Solomon Islands

O: 20SEP2024 07:55:35 7.6S 119.3E ML=4.1 EMSC FLORES SEA

P: 29SEP2024 166130 7.0S 120.0E 4.0-5.4 CAAAA Flores Island area

O: 20SEP2024 23:26:16 8.4S 115.4E MB=4.6 EMSC BALI REGION, INDONESIA

P: 22SEP2024 166138 9.0S 114.0E 4.0-5.6 AABAA So. of Bali

NEIC reported this earthquake of M 4.6 in Bali, Indonesia was felt with intensity up to IV in the area(s) of Bali, Indonesia in Karangasem, Kuta, Ubud and II-III in Denpasar, Klungkung, Negara, Singaraja, Tabanan and possibly as far as Java.

EMSC reported moderat shaking in Bali at Bangli, Tegallalang, Banjarangkan, Tampaksiring, Ubud, Suikawati, (with loud earthquake noise). Dakin Labak, Singakerta, Bebandem, Blahbatuh, Gianyar, Sukawati, Mengwi, Denpasar among others and as far as 100 km from the epicenter at Praya Barat and Kopang, Indonesia.

No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.

CENTRAL AND SOUTH AMERICA

O: 21SEP2024 06:28:30 8.3N 82.8W ML=4.3 EMSC PANAMA-COSTA RICA BORDER REGIO

P: 23SEP2024 166118 7.0N 82.0W 3.5-5.1 ABAAA Costa Rica

O: 20SEP2024 22:40:07 10.8N 86.8W ML=4.0 EMSC OFF COAST OF COSTA RICA

P: 22SEP2024 166162 10.0N 86.0W 3.5-5.3 AAAAA Nicaragua

O: 21SEP2024 00:25:33 12.8N 89.0W ML=4.1 EMSC OFFSHORE EL SALVADOR

O: 20SEP2024 21:15:15 13.0N 88.9W MB=4.4 EMSC OFFSHORE EL SALVADOR

P: 21SEP2024 166151 13.0N 89.0W 3.5-5.5 AAAAA Coast of Central America

NEIC reported this earthquake of M 4.4 in El Salvador was felt with intensity up to II-III in the area(s) of El Salvador at Nuevo Cuscatlan, El Rosario, La Paz, San Salvador and Concepcion Batres, Usulutan.

O: 20SEP2024 09:21:15 15.6N 95.2W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 24SEP2024 166165 15.0N 96.0W 3.5-5.5 BAAAA Oaxaca, Mexico

O: 21SEP2024 04:39:03 16.2N 93.1W ML=4.1 EMSC CHIAPAS, MEXICO

O: 20SEP2024 11:45:26 15.9N 92.6W ML=4.1 EMSC CHIAPAS, MEXICO

P: 24SEP2024 166154 15.0N 92.0W 3.5-5.2 BAAAA Guatemala

O: 20SEP2024 16:58:41 17.4N 94.9W ML=4.2 EMSC VERACRUZ, MEXICO

P: 26SEP2024 166150 17.0N 95.0W 3.5-5.1 CAAAA Chiapas, Mexico

O: 21SEP2024 04:44:28 19.1N 67.3W MD=3.7 EMSC PUERTO RICO REGION

O: 20SEP2024 14:18:55 18.0N 67.1W MD=3.1 EMSC PUERTO RICO

P: 24SEP2024 166169 19.0N 66.0W 3.4-5.3 BAAAA Puerto Rico

O: 20SEP2024 23:11:44 31.3S 68.7W MB=4.6 EMSC SAN JUAN, ARGENTINA

P: 22SEP2024 166361 31.0S 69.0W 4.0-5.6 AAAAA Central Chile

O: 20SEP2024 18:21:59 36.5S 74.6W ML=4.0 EMSC OFF COAST OF BIO-BIO, CHILE

P: 29SEP2024 166364 37.0S 74.0W 4.0-5.8 CAAAA Central Chile

AFRICA AND EUROPE

O: 20SEP2024 23:06:20 21.9S 29.3E ML=4.3 EMSC ZIMBABWE

P: 25SEP2024 166354 27.0S 27.0E 3.0-4.6 BCBAA Rep. South Africa

O: 21SEP2024 03:00:12 38.2N 12.3E ML=4.1 EMSC SICILY, ITALY

P: 22SEP2024 166217 37.0N 13.0E 3.0-4.8 ABAAA Mediterranean/Sicily

NEIC reported this earthquake of M 3.8 in Sicily, Italy was felt with intensity up to II-III in the area(s) of Sicily, Italy in Trapani and Valderice.

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 20SEP2024 10:52:00 17.7S 172.6W MB=5.2 EMSC TONGA REGION

P: 24SEP2024 166344 19.0S 173.0W 4.0-5.5 BBAAA Tonga Islands

O: 20SEP2024 16:44:46 18.4S 177.7W MB=4.8 EMSC FIJI REGION

P: 25SEP2024 166343 17.0S 177.0W 4.0-5.9 BBAAA Tonga Islands

O: 20SEP2024 11:57:44 19.8S 178.3W MB=4.4 EMSC FIJI REGION

P: 26SEP2024 166357 20.0S 176.0W 4.0-5.6 CABAA Tonga Islands

O: 20SEP2024 09:30:27 23.5S 171.0E MB=4.7 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 24SEP2024 166352 22.0S 171.0E 4.0-5.4 BBAAA Loyalty Islands

OCEAN RIDGES

O: 20SEP2024 17:02:08 57.9S 25.6W MB=4.7 EMSC SOUTH SANDWICH ISLANDS REGION

P: 23SEP2024 166379 60.0S 26.0W 4.0-5.9 BCAAA So. Sandwich Islands

P: 25SEP2024 166378 58.0S 26.0W 4.0-6.1 BAAAA So. Sandwich Islands

ZEALANDIA AND AUSTRALIA REGION

O: 21SEP2024 02:32:17 29.0S 176.6W MW=5.6 EMSC KERMADEC ISLANDS REGION

P: 21SEP2024 166368 31.0S 177.0W 4.0-5.7 ABAAA So. Kermadec Islands

P: 27SEP2024 166353 29.0S 176.0W 4.0-5.4 CAAAA No. Kermadec Islands

O: 20SEP2024 21:05:35 32.9S 177.2W MB=4.5 EMSC SOUTH OF KERMADEC ISLANDS

P: 21SEP2024 166368 31.0S 177.0W 4.0-5.7 ABAAA So. Kermadec Islands

P: 23SEP2024 166369 32.0S 179.0W 4.0-5.4 ABABA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 20SEP2024 17:31:23 22.1N 144.4E MB=4.9 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 29SEP2024 166189 23.0N 143.0E 4.0-5.5 CAAAA Volcano Islands

O: 20SEP2024 12:22:19 33.3N 132.3E MB=4.9 EMSC SHIKOKU, JAPAN

P: 25SEP2024 166216 31.0N 132.0E 3.5-4.9 BCAAA Kyushu, Japan area

NEIC reported this earthquake of M 4.9 in Shikoku, Japan was felt with intensity up to IV in the area(s) of Shikoku, Japan at Yawatahama, Ehime with II-III shaking in Hiroshima, Okayama, Iwakuni, Yamaguchi and Saiki, Oita, Japan.

O: 21SEP2024 02:20:27 46.2N 149.4E MB=4.3 EMSC KURIL ISLANDS

P: 23SEP2024 166269 44.0N 149.0E 3.5-5.8 ACAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 20SEP2024 20:44:37 30.9N 116.4W ML=3.1 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 24SEP2024 166235 31.9N 116.3W 2.5-4.5 BAAAA So. California

O: 21SEP2024 01:17:13 33.7N 116.7W ML=2.6 EMSC SOUTHERN CALIFORNIA

P: 21SEP2024 166240 34.6N 116.7W 2.5-4.7 AAAAA So. California

NEIC reported this earthquake of M 2.6 in Southern California was felt with intensity up to II-III in the area(s) of Southern California in Idyllwild, Palm Springs, Temecula and Los Angeles.

O: 20SEP2024 17:02:34 34.1N 118.2W ML=2.3 EMSC GREATER LOS ANGELES AREA, CALI

P: 23SEP2024 166241 34.3N 118.5W 2.5-4.4 BAAAA So. California

O: 20SEP2024 21:45:31 38.7N 118.6W ML=2.3 EMSC NEVADA

O: 21SEP2024 03:10:13 38.7N 118.6W ML=2.5 EMSC NEVADA

P: 24SEP2024 166196 38.6N 118.6W 2.5-5.0 BAAAA California/Nevada area

O: 20SEP2024 20:50:53 38.8N 122.8W MD=2.1 EMSC NORTHERN CALIFORNIA

O: 20SEP2024 22:56:37 38.8N 122.7W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 22SEP2024 166205 38.5N 122.7W 2.5-4.4 AAAAA Central California

O: 21SEP2024 00:01:05 40.4N 122.1W MD=2.2 EMSC NORTHERN CALIFORNIA

P: 23SEP2024 166287 40.4N 122.2W 2.5-4.6 AAAAA Northern California

O: 21SEP2024 04:50:43 40.6N 125.0W ML=2.9 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 23SEP2024 166288 40.6N 124.9W 2.5-4.5 AAAAA Off Coast of No. Calif

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

ALASKA

No events of M>=3 were located in Alaska today.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 20SEP2024 14:06:37 48.7N 129.0W MB=3.2 ECAN OF PORT HARDY, BC

P: 21SEP2024 166300 48.9N 129.3W 2.8-5.1 AAAAA Vancouver Island area

ROCKY MOUNTAINS REGION

O: 20SEP2024 14:07:26 31.6N 104.4W ML=2.3 EMSC WESTERN TEXAS

O: 21SEP2024 05:19:55 31.6N 104.6W ML=2.0 EMSC WESTERN TEXAS

O: 20SEP2024 07:17:52 32.4N 102.0W ML=2.5 EMSC WESTERN TEXAS

O: 20SEP2024 16:58:56 31.7N 101.7W ML=3.2 EMSC WESTERN TEXAS

P: 23SEP2024 166231 31.6N 103.6W 2.0-4.2 AAAAA SW U.S.A

NEIC reported these earthquakes of M 3.1 and M 2.5 in Western Texas was felt with intensity up to II in the area(s) of Western Texas at Garden City and in Artesia, New Mexico.

O: 20SEP2024 14:29:40 44.5N 116.3W ML=2.1 EMSC SOUTHERN IDAHO

P: 24SEP2024 166277 44.6N 116.0W 2.0-4.3 BAAAA Montana/Idaho

EASTERN U.S./CANADA

No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.

HAWAII

O: 20SEP2024 07:31:23 19.3N 155.3W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII

P: 24SEP2024 166155 19.9N 156.1W 3.0-4.4 BAAAA Hawaii

NEIC reported this earthquake of M 3.1 in Hawaii was felt with intensity up to IV in the area(s) of Hawaii at Volcano, Pahoa, Naaleu, Captain Cook, Pepeekeo and Kailua Kona.

MODERATE QUAKE IN NEW GUINEA

EARTHQUAKE SUMMARY FOR SEPTEMBER 19, 2024

It was a relatively quiet day in global seismicity today. The strongest earthquake in the world today was an M 5.6 in eastern New Guinea. NEIC reported it was felt with intensity II-III in the Highlands of Papua New Guinea at Kainantu and Mount Hagen. The last earthquake within about 200 km of today's event of M 5.6 of equal or larger magnitude was an M 6.3 on September 11, 2024 and this may be a regional aftershock of that event. A closer earthquake of M 5.7 hit near today's epicenter on May 21, 2024. At the time this summary noted:

"The strongest earthquake in the world today was an M 5.7 in Papua New Guinea. NEIC reported it was felt with intensity up to IV in Lae, PNG. It occurred near local solar noon and may have been promoted by strong tidal stresses associated with the full moon of May 23 which maximizes over this epicenter

...

This event joins other moderately large earthquakes along the geomagnetic equator in Papua New Guinea and New Ireland/Britain which have occurred daily since the major geomagnetic storm of mid-May, the strongest such ionospheric storm since October, 2003. Effects of such geomagnetic storms are greatest along the geomagnetic equator.

This is the strongest earthquake within about 200 km of today's epicenter

since an M 5.9 on November 14, 2023. The last of M>=6 was an M 6.7 and M 6.9 on October 7, 2023. At the time this summary noted:

"The earthquakes in New Guinea coincided with a moderate solar flare (#5480) and may have been promoted by SFE associated with that flare.

...

An M 7.0 occurred about 350 km north of today's epicenter on April 2, 2023. At the time 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, April 2, 2023, October 7, 2023, May 21, 2024)

Forecast 166134 had expected today's event within about 50 km was likely around

September 22, 2024.

O: 19SEP2024 08:40:59 5.5S 147.5E MW=5.6 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 22SEP2024 166134 5.0S 147.0E 4.0-5.5 AAAAA New Ireland

An earthquake of M 2.6 in Missouri was widely felt with intensity up to IV within about 50 km of the epicenter. This earthquake was reported by NEIC to have been felt with intensity IV in Missouri at O'Fallon and II-III in Old Monroe, Winfield, Moscow Mills, Lake Saint Louis, Wentzville, Foristell, Troy, Saint Louis, Sainte Charles, Defiance, Grafton, Chesterfield, Ballwin and in Brighton, Illinois among others. This is the strongest earthquake within about 100 km of this epicenter since an M 2.9 on April 29, 2022 and an M 2.6 on September 5, 2015. At the time of the event in 2022 this summary noted:

"A light earthquake of M 2.8 was widely felt in the area of St. Louis, Missouri today. NEIC reported it was felt with intensity II-III in Valley Park, Ballwin, Fenton, High Ridge, Saint Louis, Eureka, It was also reported lightly felt in Illinois, Iowa, Tennessee, Indiana, Kansas and possible as far as Arkansas, Nebraska, Minnesota, Wisconsin, Michigan, Georgia, Texas, Ohio, Alabama, and Florida. This earthquake is the strongest within about 100 km of this epicenter since an M 3.9 on April 29, 2011 and an M 2.8 on May 5, 2008. ... One of the strongest earthquakes in this area in recent history occurred with an M 5.0 on April 30, 1899, 123 years ago (see history section of this summary)." (April 30, 2022)

Forecast 166221 had expected this event within about 150 km was likely in late

September.

O: 19SEP2024 08:30:21 38.9N 90.7W ML=2.6 EMSC MISSOURI

P: 27SEP2024 166221 38.0N 89.0W 2.0-4.1 CABAA New Madrid area

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 20SEP2024 06:15:54 52.7N 160.4E MB=4.7 EMSC OFF EAST COAST OF KAMCHATKA

P: 22SEP2024 166311 52.0N 161.0E 4.0-5.5 AAAAA E. of Kamchatka

O: 19SEP2024 17:01:29 53.0N 88.1E MB=4.4 EMSC SOUTHWESTERN SIBERIA, RUSSIA

NEIC reported this earthquake of M 4.4 in Southwestern Siberia, Russia was felt with intensity up to IV in the area(s) of Southwestern Siberia, Russia in Sheregesh Kemerovo.

INDONESIA AND PHILIPPINES

O: 19SEP2024 16:14:17 0.8N 98.8E MB=4.9 EMSC NIAS REGION, INDONESIA

P: 18SEP2024 116124 1.0N 97.0E 4.0-5.4 AABAA Nicobar Islands

O: 19SEP2024 07:45:36 2.2N 128.7E Mw=5.2 EMSC HALMAHERA, INDONESIA

O: 19SEP2024 07:57:06 2.2N 128.6E ML=4.3 EMSC HALMAHERA, INDONESIA

O: 19SEP2024 08:28:26 2.2N 128.6E ML=4.2 EMSC HALMAHERA, INDONESIA

O: 19SEP2024 20:43:44 2.1N 128.7E ML=4.2 EMSC HALMAHERA, INDONESIA

P: 19SEP2024 116120 3.0N 127.0E 4.0-5.6 AABAA Halmahera

O: 19SEP2024 08:40:59 5.5S 147.5E MW=5.6 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 22SEP2024 166134 5.0S 147.0E 4.0-5.5 AAAAA New Ireland

O: 19SEP2024 17:08:40 7.3S 156.1E MB=5.0 EMSC SOLOMON ISLANDS

P: 22SEP2024 166141 8.0S 155.0E 4.0-5.5 BAAAA Solomon Islands

O: 19SEP2024 22:31:46 20.9N 146.4E MB=4.6 EMSC MARIANA ISLANDS REGION

P: 23SEP2024 166189 20.0N 146.0E 4.0-5.5 BAAAA Volcano Islands

CENTRAL AND SOUTH AMERICA

O: 20SEP2024 02:10:27 3.7S 80.0W ML=4.0 EMSC NEAR COAST OF ECUADOR

P: 22SEP2024 166129 4.0S 80.0W 4.0-5.6 AAAAA Ecuador

O: 19SEP2024 16:19:24 15.2N 94.6W ML=4.1 EMSC OFF COAST OF OAXACA, MEXICO

P: 17SEP2024 116150 15.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 19SEP2024 14:37:23 17.1N 94.6W ML=4.1 EMSC OAXACA, MEXICO

P: 22SEP2024 166150 18.0N 95.0W 3.5-5.4 BAAAA Chiapas, Mexico

O: 20SEP2024 01:24:13 18.2N 69.2W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

O: 19SEP2024 22:18:28 18.6N 71.3W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 22SEP2024 166170 19.0N 71.0W 3.4-5.3 BAAAA Puerto Rico

O: 20SEP2024 06:00:15 18.8N 66.0W MD=3.2 EMSC PUERTO RICO REGION

P: 17SEP2024 116170 18.0N 66.0W 3.4-5.4 BAAAA Puerto Rico

O: 20SEP2024 00:12:32 19.2N 73.3W ML=3.0 EMSC HAITI REGION

P: 17SEP2024 116177 20.0N 73.0W 3.0-4.8 BAAAA Bahamas/No. Caribbean

O: 20SEP2024 02:10:17 21.3S 68.8W MB=4.5 EMSC ANTOFAGASTA, CHILE

P: 22SEP2024 166347 21.0S 68.0W 4.0-5.6 AAAAA Argentina

O: 20SEP2024 01:11:49 24.2N 103.5W ML=4.6 EMSC ZACATECAS, MEXICO

NEIC reported this earthquake of M 4.1 in Northern Zacatecas, Mexico was felt with intensity up to II-III in the area(s) of Northern Zacatecas, Mexico at Villa Gonzalez Ortega and in Tlalnepantla.

O: 19SEP2024 08:35:01 28.0N 112.0W ML=4.4 EMSC GULF OF CALIFORNIA

P: 15SEP2024 116232 30.4N 114.5W 2.0-4.2 BCBAA SW U.S.A

AFRICA AND EUROPE

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 19SEP2024 23:45:58 18.0S 174.5W MB=4.6 EMSC TONGA

P: 24SEP2024 166344 19.0S 173.0W 4.0-5.5 BABAA Tonga Islands

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 19SEP2024 10:17:52 5.6S 82.6E MB=5.1 EMSC SOUTH INDIAN OCEAN

ZEALANDIA AND AUSTRALIA REGION

O: 19SEP2024 15:34:56 45.1S 167.4E ML=4.0 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 19SEP2024 15:34:57 45.1S 167.3E MS=4.4 GEONET South Island, New Zealand

P: 14SEP2024 116380 45.0S 167.0E 3.0-5.1 BAAAA So. Island, N.Z.

GEONET noted that 30 people reported feeling this event with 19 at weak, 11 at light intensity in Southern South Island, New Zealand.

JAPAN AND KURIL ISLANDS

O: 20SEP2024 05:13:42 23.4N 142.5E MW=5.2 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 20SEP2024 116193 22.0N 143.0E 4.0-5.6 ABAAA Volcano Islands

O: 19SEP2024 09:18:12 35.7N 140.7E MB=4.6 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 20SEP2024 116226 36.0N 142.0E 4.0-5.4 AAAAA Off East Coast Honshu

O: 19SEP2024 22:05:51 46.5N 149.9E MB=4.1 EMSC KURIL ISLANDS

P: 19SEP2024 116294 45.0N 149.0E 3.5-5.6 ABAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 19SEP2024 17:14:26 30.6N 116.4W ML=3.7 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 24SEP2024 166235 31.9N 116.3W 2.5-4.5 BBAAA So. California

O: 20SEP2024 02:53:58 40.3N 121.2W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 25SEP2024 166287 40.3N 121.2W 2.5-4.8 BAAAA Northern California

ALASKA

O: 20SEP2024 00:13:52 51.1N 176.2W ML=3.9 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.

O: 20SEP2024 02:09:15 51.1N 176.2W ML=4.1 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 18SEP2024 116303 51.9N 176.0W 3.5-5.0 AAAAA Andreanoff Isls, Aleutians

O: 19SEP2024 07:01:38 52.1N 171.6W ML=3.1 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 22SEP2024 166308 52.4N 170.7W 3.5-5.2 BAAAA Andreanoff Isls, Aleutians

O: 20SEP2024 01:37:53 56.6N 156.9W ML=3.2 EMSC ALASKA PENINSULA

P: 26SEP2024 166304 55.8N 157.7W 3.5-4.9 CAAAA Alaska Peninsula

O: 20SEP2024 04:02:39 63.2N 150.5W MB=4.1 EMSC CENTRAL ALASKA

P: 16SEP2024 116327 63.1N 151.9W 3.2-5.2 BAAAA Central Alaska

NEIC reported this earthquake of M 3.9 in Central Alaska was felt with intensity up to II in the area(s) of Central Alaska in Wasilla.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 20SEP2024 02:22:56 51.3N 130.8W MB=3.9 ECAN OF PORT HARDY, BC

O: 19SEP2024 09:58:58 51.0N 130.7W MB=4.2 ECAN OF PORT HARDY, BC

O: 20SEP2024 02:22:56 51.3N 130.8W ML=3.9 EMSC HAIDA GWAII REGION

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 19SEP2024 07:41:55 31.7N 104.5W ML=2.2 EMSC WESTERN TEXAS

O: 20SEP2024 00:31:34 32.0N 103.9W ML=2.0 EMSC WESTERN TEXAS

O: 19SEP2024 19:13:18 31.6N 104.4W ML=2.0 EMSC WESTERN TEXAS

P: 23SEP2024 166231 31.6N 103.6W 2.0-4.2 BAAAA SW U.S.A

O: 19SEP2024 16:42:31 32.4N 102.1W ML=2.0 EMSC WESTERN TEXAS

O: 19SEP2024 22:09:10 32.4N 102.1W ML=2.1 EMSC WESTERN TEXAS

P: 17SEP2024 116231 31.4N 101.8W 2.0-4.2 AAAAA SW U.S.A

O: 19SEP2024 17:03:45 38.8N 111.4W ML=2.0 EMSC UTAH

O: 19SEP2024 16:11:26 38.8N 111.3W ML=2.1 EMSC UTAH

P: 26SEP2024 166255 38.3N 112.2W 2.0-4.3 CAAAA Utah area

O: 20SEP2024 00:34:23 44.4N 115.2W ML=2.4 EMSC SOUTHERN IDAHO

P: 18SEP2024 116274 44.5N 116.2W 2.0-4.3 AAAAA Montana/Idaho

P: 26SEP2024 166277 44.5N 115.2W 2.0-4.3 CAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 19SEP2024 08:30:21 38.9N 90.7W ML=2.6 EMSC MISSOURI

P: 27SEP2024 166221 38.0N 89.0W 2.0-4.1 CABAA New Madrid area

O: 19SEP2024 00:16:29 47.6N 70.0W MB=0.7 ECAN OF LA MALBAIE, QC

P: 17SEP2024 116272 47.0N 69.0W 2.0-4.3 AAAAA Maine

HAWAII

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

UNUSUAL QUAKE IN EASTERN CHINA TRIGGERED BY TYPHOON PULASAN

EARTHQUAKE SUMMARY FOR SEPTEMBER 18, 2024

An unusual earthquake occurred today in eastern China with M 4.9. NEIC reported it was felt with intensity up to V in Anhui, China at Wuhu; IV in Chuzhou, Hefei, Maanshan, Tunxi, in Changsha, Hunan and in Jiangsu, China at Changsha, Dingshu, Nanjing, Xiaolingwei and Xuzhou. EMSC reported moderate shaking in China at Hefei City, Nanjing, Hangzhou City,and Shaoxing, China with an earthquake noise. This is the strongest earthquake in eastern China within about 250 km of today's epicenter since an M 4.9 on January 19, 2011. Earthquakes of M 4.9 also occurred about 300 km northeast of this on July 20, 2012 with M 4.9 and about 300 km southwest with M 5.2 on November 26, 2005. At the time of the M 4.9 on July 20, 2012 this summary noted:

"An earthquake in southeastern China of M 4.8 was followed by more than 50 aftershocks according to Shanghai Daily. Most were of M 3-4 and were lightly felt in the Yangzhou area. A major quake was not expected. The mainshock left one person dead and another four were slightly injured according to Xinhua. The quake also caused cracks to several residential buildings and toppled a few smokestacks in Zhouxiang township according to local authorities. It was also felt strongly in Zhenjiang and Ninjing, the capital city of Jiangsu.

NEIC reported this earthquake of M 4.9 in Jiangsu, China was felt with intensity II-III in the area(s) of Jiangsu at Changzhou, Huaiyin, Nanjing, Yancheng, Yangzhou, Zhenjiang, and in Anhui at Hefei and Chuzhou, China.

The only similar event in this area of China in the past 22 years was an M 5.1 about 300 km to the northwest of this epicenter on September 20, 1995." (July 21, 2012)

and on January 19, 2011:

"An unusual earthquake in Anhui, eastern China followed the Pakistan event today with M 4.9. NEIC reported this event was felt with intensity IV in Anhui at Chizhou and Hefei and II in Jiangsu at Nanjing, China. This epicenter is within 300 km of the exact antipode of the M 7.1 in Argentina of early January. This could have been affected by both the Pakistan and the Argentina earthquakes." (January 19, 2011)

Further information on the seismicity of eastern China in this area was provided in this summary on November 26, 2005 as:

"A moderate sized earthquake of M 5.5-5.6 was felt widely in east-central China today. Data on the NEIC website indicates that this event was felt with maximum intensity VII at Jiujiang, China and with lesser intensity at Changsha, Chizhou, Hangzhou, Meizhou, Nanchang, Wuan, Wuhan, Yiyang and Zhuzhou, China. It was felt with intensity IV at Wuan as far as 800 km from the epicenter. The Xinhua News Agency of China reported that at least 14 were killed and more than 400 injured in this quake. The epicenter was n Ruichang a city of more than 400,000 in Jiangxi province. About 130,000 buildings were reported damaged or collapsed in the quake and evacuation of 420,000 people were being evacuated in the wake of two moderate aftershocks. CRI (China News Source) reported that of the injured 78 were injured in the course of the evacuation. Many were spending the night outdoors for fear of damage from aftershocks and tents have been provided. The Chinese Seismological Bureau gave the quake M 5.7 while other teleseismic networks gave magnitudes M 5.5-5.8. This is the strongest event located in this region of eastern China (25-35N 110-120E) since events of M 5.5 on July 9, 1979 and a similar event on April 22, 1974. These earthquakes occurred about 400 km to the northeast of today's earthquake. This is about as large as the largest earthquake ever located within 200-300 km of this epicenter. Earthquakes in the region have been reported in 1425 (M 5.8); 1556 (M 5.6); 1584 (M 5.5) and 1962 (M 5.5). Smaller quakes hit in 1987 and 1949 in the Jiangxi area. The area is a popular tourist area. The quake killed six in Jiujiang county and injured 47 there. Other casualties occurred at Ruichang City (5 killed, 40 injured) and Wuxue (1 killed). The area has been placed under seismic watch on Nov. 19 effective through Nov. 26. Forecast 25890 expected activity southeast of this around Nov. 25 (but see also forecast 25886 which expected activity earlier in the month of November). The occurrence of this earthquake at this time may be related to landfall of Typhoon Bolaven which his southeastern China on Nov. 22-23 and has moved north and west while dissipating since that time in Central China. Stresses induced by hurricanes and typhoons may help to trigger regional seismicity." (November 26, 2005)

TS Pulasan made landfall to the east of today's earthquake in China about the same time this earthquake occurred. It is likely that landfall of Tropical Storm Pulasan in Southern China was effective in promoted today's earthquake in China as noted in the previous issue of this summary:

"TROPICAL STORM PULASAN (15W)

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

TS PULASAN 2024-09-19 00:00 UT 29.6N 123.1E 45 kts Eastern China

TS Pulasan continued today with winds up to 45 kts over Eastern China. It is expected to track to the northwest over the next two days and to make landfall ... on September 19-20. Seismicity in southern Japan is expected to be enhanced as this storm passes through the area." (September 19, 2024)

Readers should not that at the time of landfall of TS Pulasan it was located near 30N 122E - the earthquake in China was located at 31N 118E - about 300 km northwest of the landfall, and very likely triggered by that storm's landfall.

Forecast 166246 had expected today's earthquake in China within about 200 km

was likely around September 22.

O: 18SEP2024 12:08:16 31.9N 117.7E MB=4.9 EMSC ANHUI, CHINA

P: 22SEP2024 166246 31.0N 116.0E 3.5-5.1 BAAAA So. China

The largest earthquake of the day was an M 5.7 in the northern Kermadec Islands, New Zealand. It was not reported felt in this remote area. This event was not reported felt in this remote area. The last earthquake of M>=5.7 in the northern Kermadec Islands within about 200 km of today's epicenter was an M 6.2 on May 31, 2024 and an M 5.8 on March 20, 2022 – both abut 150 km south of today's epicenter. At the time of the May, 2024 event this summary noted:

Islands occurred within minutes of local solar noon and were probably promoted by energy associated with the full moon which maximize near this hour. This is the strongest earthquake in the Kermadec Islands within about 200 km of this epicenter since an M 7.1 more than a year ago on April 24, 2023 about 150 km southwest of today's epicenter. At the time this summary noted:

in this remote area. An M 6.9 in the Kermadec Islands of March 4, 2023 followed a major geomagnetic storm of February 27-28, 2023." (April 24, 2023, May 31, 2024))

Today's event of M 5.7 also occurred within minutes of local solar noon and was probably promoted by strong tidal stresses with today's full moon.

Forecast 166353 had expected this activity in the northern Kermadec Islands was likely towards the end of September.

O: 18SEP2024 11:53:56 27.4S 176.6W Mw=5.7 EMSC KERMADEC ISLANDS REGION

O: 19SEP2024 04:10:22 27.5S 176.4W mb=4.7 EMSC KERMADEC ISLANDS REGION

O: 19SEP2024 04:01:59 27.3S 176.4W MB=4.7 EMSC KERMADEC ISLANDS REGION

P: 27SEP2024 166353 29.0S 176.0W 4.0-5.4 CBAAA No. Kermadec Islands

An earthquake of M 5.5 also occurred today in the northern Andaman Islands of India. This event occurred within minutes of local solar noon and was probably promoted by strong tidal stresses associated with today's full moon. The last earthquake of equal or larger magnitude within the northern Andaman Islands within about 200 km of this epicenter was an M 5.6-5.9 on July 28, 2023. At the time this summary noted:

"The strongest earthquake in the world today was an M 5.9 in the Andaman Islands, India. NEIC reported it was felt with intensity V in the Andaman and Nicobar Islands at Bobuflat and Point Blair. This earthquake may be related to stresses associated with the upcoming full moon as it occurred near the longitude of maximum stress with that alignment.

…

(July 28-29, 2023)

The M 5.6-5.9 in the Andaman Islands today is the strongest event in that area within about 250 km since an M 6.5 on May 31, 2010. When an M 6.1 occurred about 300 km northeast of today's epicenter on July 17, 2020, this summary noted:

"This activity included an M 6.1 in the Andaman Islands and an M 5.3 in Myanmar.

The strongest earthquake in the world today occurred as an M 6.1 in the Andaman Islands, India. NEIC reported it was felt with intensity I-II in Port Blair and Bombuflat, Andaman and Nicobar Islands, India. The M 6.1 was accompanied by a series of moderate foreshocks and aftershocks including events of M 4.8 and M 5.6 near local solar midnight, a prime time for tidal triggering. The Andaman Islands are capable of great earthquakes but the last of M>=6.1 within about 250 km of today's epicenter was an M 6.5 more than 10 years ago on May 31, 2010. The area was active to the north following the great tsunamigenic quake of Boxing Day (December 26, 2004) which killed upward toward a quarter million around the Indian Ocean. Strong quakes followed every two years after that up to 2010 when quiet conditions returned to the region." (July 17, 2020, July 28, 2023)

Forecasts 116148 and 166147 had expected this area would see enhanced seismicity in mid-September within about 50 km of this epicenter.

O: 19SEP2024 05:20:58 10.6N 91.7E MW=5.5 EMSC ANDAMAN ISLANDS, INDIA REGION

P: 13SEP2024 116148 11.0N 92.0E 4.0-5.5 CAAAA Andaman Islands

P: 28SEP2024 166147 11.0N 92.0E 4.0-5.4 CAAAA Andaman Islands

The strongest earthquakes in the U.S. or Canada today were aftershocks in the Queen Charlotte Islands of Canada. These included an M 3.2 and M 4.7. They were not reported felt in this epicentral area.

Forecasts 116304 had expected this activity within about 100 km was likely around September 20.

O: 18SEP2024 21:56:32 51.4N 130.9W ML=3.2 EMSC HAIDA GWAII REGION

O: 18SEP2024 12:02:12 51.6N 130.6W ML=4.7 EMSC HAIDA GWAII REGION

P: 25SEP2024 166309 50.3N 130.2W 3.0-5.0 CBAAA British Colombia

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 18SEP2024 17:10:14 24.0N 121.6E Mw=4.1 EMSC TAIWAN

O: 18SEP2024 15:09:52 24.0N 122.5E MW=4.6 EMSC TAIWAN REGION

P: 18SEP2024 116191 23.0N 121.0E 4.0-5.4 AAAAA Taiwan

NEIC reported this earthquake of M 4.1 in Taiwan was felt with intensity up to II in the area(s) of Taiwan in Taipei at Yungho.

O: 18SEP2024 20:23:36 37.6N 71.6E mb=4.2 EMSC TAJIKISTAN

O: 18SEP2024 20:14:25 37.9N 71.7E mb=4.4 EMSC TAJIKISTAN

O: 18SEP2024 19:52:00 37.6N 71.7E MB=4.7 EMSC TAJIKISTAN

P: 18SEP2024 116211 37.0N 70.0E 3.8-5.6 AABAA Hindu Kush/Pakistan

EMSC reported this earthquake of M 4.5 in Tajikistan was felt with intensity up to IV in the area(s) of Tajikistan in Suchon, Khorugh, Nazarsho Dodkhudoev, Rushan with long duration.

O: 19SEP2024 04:54:32 41.2N 78.5E MB=4.0 EMSC SOUTHERN XINJIANG, CHINA

P: 15SEP2024 116270 41.0N 78.0E 4.0-5.4 BAAAA Kirgizstan/Xinjiang

P: 17SEP2024 116270 40.0N 77.0E 4.0-5.4 ABAAA Kirgizstan/Xinjiang

O: 18SEP2024 12:08:16 31.9N 117.7E MB=4.9 EMSC ANHUI, CHINA

P: 22SEP2024 166246 31.0N 116.0E 3.5-5.1 BAAAA So. China

O: 18SEP2024 14:44:00 29.0N 102.0E MB=4.4 EMSC WESTERN SICHUAN, CHINA

P: 16SEP2024 116185 28.0N 101.0E 4.0-5.4 AAAAA Myanmar

INDONESIA AND PHILIPPINES

O: 18SEP2024 11:04:27 2.2S 139.1E ML=4.1 EMSC NEAR N COAST OF PAPUA, INDONES

P: 16SEP2024 116146 2.0S 138.0E 4.0-5.5 AAAAA West Irian, PNG

O: 19SEP2024 04:08:19 2.3N 122.8E MB=4.5 EMSC CELEBES SEA

P: 16SEP2024 116144 2.0S 123.0E 4.0-5.4 BCAAA Sulawesi area

O: 19SEP2024 05:39:36 4.3S 143.3E MB=4.4 EMSC NEW GUINEA, PAPUA NEW GUINEA

P: 18SEP2024 116139 4.0S 143.0E 4.0-5.5 AAAAA Papua New Guinea

O: 18SEP2024 20:51:55 6.1S 130.6E ML=4.1 EMSC BANDA SEA

P: 26SEP2024 166146 7.0S 131.0E 4.0-5.4 CAAAA West Irian, PNG

O: 18SEP2024 11:30:26 7.5S 126.3E ML=4.0 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 20SEP2024 116126 7.0S 128.0E 4.0-5.4 AABAA Banda Sea

O: 18SEP2024 23:31:03 10.1S 113.4E ML=4.2 EMSC SOUTH OF JAVA, INDONESIA

P: 20SEP2024 116141 9.0S 113.0E 4.0-5.7 ABAAA So. of Bali

O: 19SEP2024 05:20:58 10.6N 91.7E MW=5.5 EMSC ANDAMAN ISLANDS, INDIA REGION

P: 13SEP2024 116148 11.0N 92.0E 4.0-5.5 CAAAA Andaman Islands

P: 28SEP2024 166147 11.0N 92.0E 4.0-5.4 CAAAA Andaman Islands

CENTRAL AND SOUTH AMERICA

O: 18SEP2024 07:52:31 5.2N 82.6W MB=4.7 EMSC SOUTH OF PANAMA

P: 15SEP2024 116118 4.0N 83.0W 4.0-5.4 BBAAA Ecuador

O: 19SEP2024 04:57:49 12.5N 88.2W MB=4.4 EMSC OFFSHORE EL SALVADOR

P: 21SEP2024 166151 13.0N 89.0W 3.5-5.5 AAAAA Coast of Central America

O: 18SEP2024 15:41:54 19.1N 67.5W MD=3.1 EMSC PUERTO RICO REGION

P: 19SEP2024 116176 20.0N 67.0W 3.0-4.9 AAAAA Bahamas/No. Caribbean

O: 18SEP2024 13:53:07 21.5S 68.3W MB=4.1 EMSC ANTOFAGASTA, CHILE

P: 22SEP2024 166347 21.0S 68.0W 4.0-5.6 BAAAA Argentina

O: 19SEP2024 06:50:44 30.7S 71.5W MB=4.2 EMSC COQUIMBO, CHILE

O: 19SEP2024 06:50:44 30.7S 71.4W MB=4.0 GUC COQUIMBO, CHILE

P: 17SEP2024 116369 31.0S 70.0W 4.0-5.7 AABAA Central Chile

EMSC reported this earthquake of M 4.2 in Coquimbo, Chile was felt with intensity up to II in the area(s) of Coquimbo, Chile in La Serena with an earthquake noise.

GUC reported it with M 4.0 was felt with intensity V in Coquimbo at Rio Hurtado; IV in Mone Patria, Andacollo, Ovalle, Punitaqui; III in La Serena, Paiguano and II in Combarbala, Chile.

No significant (M>=5) or unusual earthquakes were reported in Central or South America today.

AFRICA AND EUROPE

O: 19SEP2024 03:22:50 34.7N 24.1E MB=4.4 EMSC CRETE, GREECE

P: 19SEP2024 116194 36.0N 24.0E 3.0-5.1 ABAAA Aegean Sea

P: 19SEP2024 116210 34.0N 26.0E 3.0-4.6 AABAA Crete

P: 26SEP2024 166210 34.0N 24.0E 3.0-4.9 CAAAA Crete

O: 18SEP2024 23:47:38 41.0N 51.2E MB=4.0 EMSC CASPIAN SEA

P: 16SEP2024 116269 40.0N 50.0E 4.0-5.4 AAAAA Kazakhstan

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 18SEP2024 20:47:16 20.6S 177.7W MB=4.0 EMSC FIJI REGION

P: 26SEP2024 166357 20.0S 176.0W 4.0-5.6 CABAA Tonga Islands

O: 18SEP2024 20:29:30 22.7S 171.6E MB=4.5 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 17SEP2024 116357 22.0S 171.0E 4.0-5.5 AAAAA Loyalty Islands

OCEAN RIDGES

O: 19SEP2024 03:32:12 43.8S 39.0E MB=4.6 EMSC PRINCE EDWARD ISLANDS REGION

P: 29SEP2024 166371 41.0S 43.0E 4.0-5.8 CCCAA So. Indian Ocean

ZEALANDIA AND AUSTRALIA REGION

O: 18SEP2024 11:53:56 27.4S 176.6W Mw=5.7 EMSC KERMADEC ISLANDS REGION

O: 19SEP2024 04:10:22 27.5S 176.4W mb=4.7 EMSC KERMADEC ISLANDS REGION

O: 19SEP2024 04:01:59 27.3S 176.4W MB=4.7 EMSC KERMADEC ISLANDS REGION

P: 27SEP2024 166353 29.0S 176.0W 4.0-5.4 CBAAA No. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 18SEP2024 09:01:59 31.7N 141.7E MB=4.6 EMSC IZU ISLANDS, JAPAN REGION

P: 19SEP2024 116225 30.0N 142.0E 4.0-5.5 ABAAA Off East Coast Honshu

O: 18SEP2024 21:33:31 41.7N 142.7E MB=4.5 EMSC HOKKAIDO, JAPAN REGION

P: 28SEP2024 166268 42.0N 143.0E 3.5-5.4 CAAAA Hokkaido, Japan

O: 18SEP2024 20:45:50 43.3N 146.2E MB=4.7 EMSC KURIL ISLANDS

P: 16SEP2024 116266 43.0N 147.0E 3.5-5.5 AAAAA Hokkaido, Japan

O: 18SEP2024 15:26:29 46.4N 150.0E MB=4.2 EMSC KURIL ISLANDS

P: 19SEP2024 116294 45.0N 149.0E 3.5-5.6 ABAAA So. Kurils

O: 18SEP2024 13:15:45 29.8N 132.0E MB=4.6 EMSC SOUTHEAST OF RYUKYU ISLANDS

P: 25SEP2024 166216 31.0N 132.0E 3.5-4.9 CBAAA Kyushu, Japan area

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 18SEP2024 08:04:50 30.8N 114.2W ML=3.7 EMSC GULF OF CALIFORNIA

O: 18SEP2024 21:32:50 30.7N 114.3W ML=3.8 EMSC GULF OF CALIFORNIA

P: 15SEP2024 116232 30.4N 114.5W 2.0-4.2 BAAAA SW U.S.A

O: 18SEP2024 12:59:12 31.5N 115.7W ML=2.4 EMSC BAJA CALIFORNIA, MEXICO

P: 21SEP2024 166236 32.4N 115.8W 2.5-4.6 BAAAA So. California

O: 18SEP2024 14:33:33 32.9N 116.2W ML=2.1 EMSC SOUTHERN CALIFORNIA

O: 18SEP2024 12:29:53 34.0N 116.7W ML=2.0 EMSC SOUTHERN CALIFORNIA

P: 17SEP2024 116234 33.0N 115.9W 2.5-4.5 AAAAA So. California

O: 18SEP2024 20:19:25 33.6N 117.3W ML=2.1 EMSC SOUTHERN CALIFORNIA

O: 18SEP2024 15:04:23 34.2N 117.4W ML=2.1 EMSC GREATER LOS ANGELES AREA, CALIF.

P: 20SEP2024 116236 34.1N 117.4W 2.5-4.9 AAAAA So. California

O: 18SEP2024 10:09:01 37.5N 118.8W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 19SEP2024 116199 37.4N 118.6W 2.5-4.8 AAAAA California/Nevada area

ALASKA

O: 19SEP2024 05:05:28 51.7N 176.4E ML=4.1 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 25SEP2024 166318 50.0N 178.0E 4.0-5.8 CBAAA Rat Islands

O: 19SEP2024 05:32:03 55.7N 157.4W ML=3.9 EMSC ALASKA PENINSULA

P: 26SEP2024 166304 55.8N 157.7W 3.5-4.9 CAAAA Alaska Peninsula

O: 18SEP2024 15:19:21 59.2N 152.4W ML=3.0 EMSC SOUTHERN ALASKA

P: 23SEP2024 166323 60.0N 153.5W 3.2-5.1 BAAAA Central Alaska

O: 18SEP2024 22:41:38 63.8N 161.0W ML=4.0 EMSC CENTRAL ALASKA

P: 15SEP2024 116324 61.3N 158.5W 3.2-4.9 BCAAA Central Alaska

NEIC reported this earthquake of M 4.0 in Central Alaska was felt with intensity up to IV in the area(s) of Central Alaska in Unalakleet and III in Kotlik and perhaps as far as Anchorage.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 18SEP2024 21:56:32 51.4N 130.9W ML=3.2 EMSC HAIDA GWAII REGION

O: 18SEP2024 12:02:12 51.6N 130.6W ML=4.7 EMSC HAIDA GWAII REGION

P: 25SEP2024 166309 50.3N 130.2W 3.0-5.0 CBAAA British Colombia

ROCKY MOUNTAINS REGION

O: 18SEP2024 21:38:23 31.7N 104.4W ML=2.0 EMSC WESTERN TEXAS

O: 18SEP2024 19:54:16 31.6N 104.1W ML=2.0 EMSC WESTERN TEXAS

P: 14SEP2024 116231 31.4N 104.5W 2.0-4.2 BAAAA SW U.S.A

O: 18SEP2024 08:42:00 32.4N 102.1W ML=2.0 EMSC WESTERN TEXAS

P: 17SEP2024 116231 31.4N 101.8W 2.0-4.2 AAAAA SW U.S.A

O: 18SEP2024 20:15:51 41.6N 112.4W ML=2.4 EMSC UTAH

O: 18SEP2024 20:17:09 41.6N 112.4W ML=2.3 EMSC UTAH

O: 18SEP2024 07:02:13 41.6N 112.4W ML=2.1 EMSC UTAH

P: 16SEP2024 116300 43.2N 111.0W 2.0-4.0 ABAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 18SEP2024 18:48:52 28.6N 98.4W ML=2.0 EMSC SOUTHERN TEXAS

O: 18SEP2024 15:51:16 29.5N 99.3W ML=2.0 EMSC SOUTHERN TEXAS

P: 17SEP2024 116186 28.0N 98.0W 3.0-4.7 AAAAA Northern Mexico

O: 18SEP2024 07:35:20 36.5N 89.6W MD=2.0 EMSC SOUTHEASTERN MISSOURI

P: 23SEP2024 166220 36.0N 89.0W 2.0-4.4 BAAAA New Madrid area

O: 19SEP2024 04:43:00 37.2N 97.9W ML=3.4 EMSC KANSAS

P: 22SEP2024 166251 39.0N 99.0W 2.0-4.3 BBAAA Southern Plains

NEIC reported this earthquake of M 3.4 in Kansas was felt with intensity up to IV in the area(s) of Kansas in Anthony, Argonia, Attica and Harper.

HAWAII

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

UNUSUAL MODERATE QUAKE SHAKES SOUTHERN MADAGASCAR

EARTHQUAKE SUMMARY FOR SEPTEMBER 17, 2024

The most unusual earthquake in the world today was an M 5.2 off southern Madagascar. NEIC reported it was felt with intensity IV in Madagascar at Taolanaro, Toliary. Moderate but solid shaking with a significant noise was reported by EMSC in Madagascar at Fort-Dauphin. This epicenter in Madagascar is near the antipode of the dissipating Hurricane Ileana in the north Pacific and may also have been triggered by antipodal effects from that storm. This is the strongest earthquake south of Madagascar within about 500 km of today's epicenter since an M 5.3 on January 25, 2013 that occurred about 500 km northeast of today's epicenter. At the time this summary noted:

"The earthquake in Madagascar is highly unusual. It is the strongest to hit that region in at least 23 years. The only other moderate event within 300 km of this epicenter in the past 25 years was an M 5.0 on November 14, 1992 north of today's epicenter. A strong change in the geomagnetic field strength began between 2100 UT and 2200 UT when Madagascar was directly anti-solar (local solar midnight). This was apparently triggered by an equally strong change in the electron flux in the solar wind which dropped at the same time and was at its maximum state of change when the Madagascar event occurred. The antipode of Madagascar is east of Hawaii in the central Pacific Ocean but seismicity in Hawaii may also be affected by this geomagnetic change. The change in the geomagnetic field led to a short geomagnetic storm beginning about 0000 UT on January 26. The earthquake in Madagascar was reported felt with intensity V in Toliary, Madagascar." (January 25, 2013)

Today's earthquake in Madagascar occurred within about an hour of the full moon and eclipse today and was probably promoted by strong tidal stresses with this alignment. It also coincided with a strong geomagnetic storm which reached the strongest AP level (71) today since an AP of 273 was recorded on May 11, 2024, another factor which helped trigger the Madagascar quake at this time.

O: 18SEP2024 00:25:14 25.7S 47.2E MB=5.2 EMSC MADAGASCAR

An aftershock of M 4.4 also occurred today in Turkey in the ara of Malatya and Yesilyurt where NEIC reported it was felt with intensity II-III. EMSC reported solid shaking in Turkey was observed in Orduzu, Basharik, Zaviye, Ozalper, Cumhuriet, Atakent, Narlikuyu, Ali Baba, Batikent, Sair Nabi, Pinarbasi, Nizip, Sahinbey, Yeditepe. An M 4.1 aftershock was also felt in the area lightly at Zaviye, Cumhuriyet, Sumereevler, Adiyaman, Turkey.

The area saw an M 5.0 earthquake on September 7, 2024 about 150 km southwest of today's epicenter but the last of significantly larger magnitude within this area was an M 5.0 on January 24, 2024.

Forecasts 116253 and 116291 had expected moderate seismicity in Turkey at this time.

O: 18SEP2024 00:22:23 38.1N 38.4E MB=4.1 EMSC EASTERN TURKEY

P: 15SEP2024 116253 38.0N 39.0E 3.5-5.0 BAAAA Turkey

EMSC reported an earthquake of M 4.0 in Western Turkey was felt with intensity up to IV in the area(s) of Western Turkey in Kapakli, Hurriyet, Ataturk, Kethuda, Cumhuriyet, Evka, Adalet, Plevne, Yali, Kasaplar, Pelitkoy, Cuneytbey, Fatih, Ege, Kadinlardenizi, and in Greece at Linopois (Maybe).

O: 17SEP2024 11:22:57 39.0N 27.7E ML=4.0 EMSC WESTERN TURKEY

P: 19SEP2024 116291 41.0N 29.0E 3.0-5.1 ABAAA Romania/NW Turkey

A new eruption of Kilauea volcano continued today. This eruption apparently was kicked off by the X4.8 solar flare combined which was followed by an M 4.4 in Hawaii and a series of aftershock and with the tidal stresses associated with the full moon and eclipse today. This summary had noted this in previous issues as:

"The Full Moon will arrive at 02:34 UT on September 18, 2024. This is a "super-moon" (Where the moon is closest to earth) and involves a partial lunar eclipse. The eclipse will be visible in North America, Europe and Africa and may enhance seismicity those areas especially near the equator. Longitudes which will be at local solar midnight at this time are near 40 West while those at local solar noon are near 140 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 New Guinea and the Vanuatu Islands in the east. These areas are the most likely to see tidal triggering in the week surrounding this full moon. 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 14-16, 2024)

The strongest earthquakes in the U.S. or Canada today were aftershocks in the Queen Charlotte Islands of Canada. These included an M 4.2 and M 4.7. They were not reported felt in this epicentral area.

Forecasts 116304 had expected this activity within about 100 km was likely

around September 20.

O: 18SEP2024 12:02:09 51.3N 130.9W MB=4.7 ECAN OF PORT HARDY, BC

O: 17SEP2024 14:08:44 51.5N 130.9W MB=4.2 ECAN OF PORT HARDY, BC

O: 17SEP2024 14:08:44 51.5N 130.9W ML=4.2 EMSC HAIDA GWAII REGION

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 AAAAA British Colombia

A series of light earthquakes occurred off the northern coast of California today. NEIC reported these earthquakes of M 3.2 and 3.0 off the coast of Northern California was felt with intensity up to I in the area(s) of Northern California at McKinleyville. These events of M 2.4, 2.8 and 3.0 occurred near local solar noon and may have been promoted by today's full moon. These may indicate built up stress in the area and could be precursory activity to a larger event in the region in the next 7-10 days.

Forecast 116284 had expected this activity within about 50 km was likely around

September 17, 2024.

O: 17SEP2024 18:53:21 40.4N 125.1W ML=3.0 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 17SEP2024 19:16:41 40.4N 125.3W MD=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 17SEP2024 19:36:05 40.4N 125.1W MD=2.8 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 17SEP2024 116284 40.5N 125.8W 2.5-4.8 AAAAA Off Coast of No. Calif

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 18SEP2024 00:42:55 23.2N 121.4E ML=4.3 EMSC TAIWAN

P: 18SEP2024 116191 23.0N 121.0E 4.0-5.4 AAAAA Taiwan

O: 17SEP2024 08:33:01 43.7N 88.2E MB=4.9 EMSC NORTHERN XINJIANG, CHINA

O: 17SEP2024 14:28:05 37.6N 71.7E MB=4.7 EMSC TAJIKISTAN

P: 18SEP2024 116211 37.0N 70.0E 3.8-5.6 AABAA Hindu Kush/Pakistan

O: 17SEP2024 11:56:26 55.7N 161.5E MB=4.8 EMSC NEAR EAST COAST OF KAMCHATKA

P: 18SEP2024 116306 52.0N 161.0E 4.0-5.6 ACAAA E. of Kamchatka

P: 22SEP2024 166314 56.0N 163.0E 4.0-5.7 BAAAA Komandorsky Isl

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 17SEP2024 13:43:33 2.1N 123.0E ML=4.1 EMSC CELEBES SEA

P: 16SEP2024 116144 2.0S 123.0E 4.0-5.4 ACAAA Sulawesi area

O: 17SEP2024 14:23:16 2.7S 141.9E MB=4.9 EMSC NEAR N COAST OF NEW GUINEA, PN

P: 24SEP2024 166137 3.0S 141.0E 4.0-5.4 CAAAA Papua New Guinea

O: 18SEP2024 01:41:25 5.8S 147.2E MB=4.2 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 22SEP2024 166134 5.0S 147.0E 4.0-5.5 BAAAA New Ireland

O: 18SEP2024 02:41:08 7.3S 107.6E MW=5.0 EMSC JAVA, INDONESIA

P: 20SEP2024 116140 9.0S 108.0E 4.0-5.4 ABAAA So. of Java

NEIC reported this earthquake of M 5.0 in Java, Indonesia was felt with intensity up to IV in the area(s) of Java, Indonesia with VII in Paseh, V in Cikeruh, IV in Ciranjand and II-III in Dayeuh Kolot, Bandung, Padalarang, Karawang, and Pamulang.

EMSC reported it was felt with moderate shaking in Java at Ibun, Katapang, Majalaya, Margahayu, Buahbatu, Cicendo, Andir, Cimahi, Cidadap, Setu amd Ciledug.

O: 17SEP2024 21:43:04 7.5N 126.0E ML=4.2 EMSC MINDANAO, PHILIPPINES

P: 18SEP2024 116121 8.0N 127.0E 4.0-5.4 AAAAA Halmahera

O: 17SEP2024 18:31:56 8.1S 147.3E MB=4.6 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 13SEP2024 116134 6.0S 146.0E 4.0-5.4 BCBAA New Ireland

O: 17SEP2024 12:09:43 8.7N 125.9E ML=4.0 EMSC MINDANAO, PHILIPPINES

P: 16SEP2024 116115 9.0N 126.0E 4.0-5.5 AAAAA Central Philippines

P: 18SEP2024 116121 8.0N 127.0E 4.0-5.4 AAAAA Halmahera

EMSC reported this earthquake of M 4.0 in Mindanao, Philippines was felt with intensity up to IV in the area(s) of Mindanao, Philippines quite strongly at Butuan City.

CENTRAL AND SOUTH AMERICA

O: 17SEP2024 09:00:44 16.8N 94.2W ML=4.0 EMSC OAXACA, MEXICO

O: 18SEP2024 00:20:32 15.2N 95.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 17SEP2024 116150 15.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 17SEP2024 12:44:12 15.6N 98.6W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

P: 15SEP2024 116169 17.0N 98.0W 3.5-5.1 ABAAA Oaxaca, Mexico

O: 18SEP2024 06:21:52 19.0N 68.1W MD=3.1 EMSC DOMINICAN REPUBLIC REGION

O: 18SEP2024 06:06:38 19.0N 68.3W MD=3.6 EMSC DOMINICAN REPUBLIC REGION

P: 15SEP2024 116171 19.0N 69.0W 3.4-4.9 BAAAA Puerto Rico

NEIC reported this earthquake of M 3.6 in Dominican Republic was felt with intensity up to III in the area(s) of Dominican Republicn Otra Banda, La Altagracia.

O: 17SEP2024 21:57:47 21.6N 100.0W ML=3.9 EMSC SAN LUIS POTOSI, MEXICO

P: 19SEP2024 116169 19.0N 99.0W 3.5-5.3 ACAAA Oaxaca, Mexico

AFRICA AND EUROPE

O: 18SEP2024 00:22:23 38.1N 38.4E MB=4.1 EMSC EASTERN TURKEY

P: 15SEP2024 116253 38.0N 39.0E 3.5-5.0 BAAAA Turkey

O: 17SEP2024 11:22:57 39.0N 27.7E ML=4.0 EMSC WESTERN TURKEY

P: 19SEP2024 116291 41.0N 29.0E 3.0-5.1 ABAAA Romania/NW Turkey

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

O: 17SEP2024 17:22:07 24.7S 13.5W MB=4.9 EMSC SOUTHERN MID-ATLANTIC RIDGE

O: 17SEP2024 08:35:00 54.6S 158.8E MB=4.8 EMSC MACQUARIE ISLAND REGION

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

ZEALANDIA AND AUSTRALIA REGION

O: 17SEP2024 09:00:37 30.9S 178.5W MB=5.0 EMSC KERMADEC ISLANDS, NEW ZEALAND

P: 15SEP2024 116376 31.0S 177.0W 4.0-5.8 AABAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 17SEP2024 17:57:01 45.2N 150.9E MB=4.0 EMSC KURIL ISLANDS

P: 19SEP2024 116294 45.0N 149.0E 3.5-5.6 AABAA So. Kurils

P: 20SEP2024 116266 44.0N 150.0E 3.5-5.6 BBAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 17SEP2024 22:55:57 31.0N 115.1W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

P: 15SEP2024 116232 30.4N 114.5W 2.0-4.2 AAAAA SW U.S.A

O: 17SEP2024 13:37:44 32.8N 115.6W ML=2.0 EMSC SOUTHERN CALIFORNIA

P: 21SEP2024 166236 32.4N 115.8W 2.5-4.6 BAAAA So. California

O: 18SEP2024 03:45:07 35.8N 121.4W MD=2.0 EMSC OFFSHORE CENTRAL CALIFORNIA

P: 19SEP2024 116228 35.8N 121.3W 2.5-4.8 AAAAA Off So. California

O: 18SEP2024 00:12:24 37.1N 122.2W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 17SEP2024 116205 37.3N 121.6W 2.5-4.6 AAAAA Central California

O: 18SEP2024 00:23:29 37.7N 119.9W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 15SEP2024 116198 37.3N 119.4W 2.5-5.1 BAAAA California/Nevada area

O: 17SEP2024 18:08:36 37.8N 122.2W MD=2.4 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 15SEP2024 116205 37.7N 121.9W 2.5-4.4 AAAAA Central California

EMSC reported this earthquake of M 2.2 in San Francisco, California was felt with intensity up to IV in the area(s) of San Francisco, California as a short jolt in Emeryville and Berkeley.

O: 17SEP2024 18:25:13 38.0N 118.8W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 17SEP2024 116200 38.0N 118.8W 2.5-4.9 AAAAA California/Nevada area

O: 18SEP2024 01:00:41 38.1N 119.1W MD=2.0 EMSC CENTRAL CALIFORNIA

P: 17SEP2024 116198 38.3N 119.3W 2.5-4.8 AAAAA California/Nevada area

O: 17SEP2024 18:53:21 40.4N 125.1W ML=3.0 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 17SEP2024 19:16:41 40.4N 125.3W MD=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 17SEP2024 19:36:05 40.4N 125.1W MD=2.8 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 17SEP2024 116284 40.5N 125.8W 2.5-4.8 AAAAA Off Coast of No. Calif

ALASKA

No events of M>=3 were located in Alaska today.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 17SEP2024 18:35:29 45.3N 123.1W ML=2.1 EMSC OREGON

P: 13SEP2024 116298 47.5N 121.8W 2.0-4.0 BCAAA Washington state, U.S.

O: 18SEP2024 12:02:09 51.3N 130.9W MB=4.7 ECAN OF PORT HARDY, BC

O: 17SEP2024 14:08:44 51.5N 130.9W MB=4.2 ECAN OF PORT HARDY, BC

O: 17SEP2024 14:08:44 51.5N 130.9W ML=4.2 EMSC HAIDA GWAII REGION

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 BAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 17SEP2024 12:37:39 31.6N 104.4W ML=2.0 EMSC WESTERN TEXAS

O: 17SEP2024 17:27:47 31.6N 104.1W ML=2.6 EMSC WESTERN TEXAS

O: 17SEP2024 10:22:19 32.4N 102.0W ML=2.3 EMSC WESTERN TEXAS

O: 18SEP2024 06:00:46 30.9N 103.2W ML=2.3 EMSC WESTERN TEXAS

O: 18SEP2024 01:16:35 31.4N 103.9W ML=2.3 EMSC WESTERN TEXAS

P: 14SEP2024 116231 31.4N 104.5W 2.0-4.2 BAAAA SW U.S.A

NEIC reported this earthquake of M 2.6 in Western Texas was felt with intensity up to IV in the area(s) of Western Texas in Midland.

O: 18SEP2024 07:02:13 41.6N 112.4W ML=2.1 EMSC UTAH

P: 16SEP2024 116300 43.2N 111.0W 2.0-4.0 ABAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.

HAWAII

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

MODERATE EARTHQUAKE SHAKES WESTERN TEXAS WITH FULL MOON

EARTHQUAKE SUMMARY FOR SEPTEMBER 16, 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 V in Texas at Lamesa, Abilene; IV in Tarzan, Lenorah, Stanton, Ackerly, Odonnell, Sterling City, Loraine, Big Lake, San Angelo, Miles, Ozona, Muleshoe Abilene, Paint Rock, Paducah, Clyde, Ingram and Roswell, New Mexico. Intensity III was felt as far as Midland, Texas and Oklahoma City. Lesser shaking was reported in the states of Oklahoma, California, Michigan, and New Mexico. EMSC reported moderate shaking in Texas at Midland, Greenwood, Odessa, with rumbling noise, San Angelo, Lubbock, Brownwood, Amarillo, Mullin, Austin and in Carlsbad, New Mexico. This earthquake was probably promoted by strong tidal stresses which maximize tomorrow with the full (Super) moon and partial eclipse as noted in this and previous issues of this summary:

While today's event did not occur near noon or local midnight the timing of this event within a day of the full moon and eclipse suggests tidal triggering. Tidal triggering has been previously noted in earthquakes in western Texas in this summary. For example following the solar eclipse which was seen in this area on April 8, a pair of earthquakes of M 4.3 and 4.4 hit near today's epicenter. At the time this summary noted this as:

"A moderate earthquake of M 4.4 occurred in Western Texas today. NEIC reported it was felt with intensity up to VI in Stanton, Texas. An aftershock of M 2.7 was also reported felt with intensity IV in Stanton. This earthquake of M 4.3 is the strongest within about 100 km of this epicenter in more than a year. An M 4.7 hit about 100 km east of this on February 16, 2023. Larger earthquakes of M 5.4 on December 16 2022; and M 4.5 on December 27, 2021 have also hit the area in the past 10 years - since an M 4.3 on September 11, 2011. The total eclipse of the sun passed over this epicenter on April 8 and was at maximum eclipse at 18:32 UT on April 8, 2024. Today's M 4.4 occurred at 18:46 UT within several minutes of local solar noon and was probably promoted by high tidal stresses. It is also likely that today's event in Texas was promoted by the strong tidal stresses associated with the solar eclipse." (April 10, 2024)

The strongest earthquake in the U.S. or Canada today was an M 5.2 in the Mentone area of Texas. It was reported with intensity up to VI in Mentone, Texas and with moderate shaking in Carlsbad, New Mexico an in Fabens, El Paso, Texas among others and when a similar M 5.2 occurred on November 8, 2023 this summary noted:

"This event was probably promoted by well injection of waters following fracking and extraction of oil and gas in the region. This may also have been promoted by geomagnetic effects associated with the current geomagnetic storm and/or by tidal stresses associated with the upcoming new moon as described in this issue in previous summaries" (November 8, 2023)

Likewise an M 4.2 in the region on October 18, 2023 with a solar eclipse had been noted here as:

"An unusually large earthquake of M 4.2 occurred today in western Texas. NEIC reported these earthquakes of M 3.5 and M 3.9-4.2 in Western Texas were felt with intensity II-III in the area(s) of Alamogordo, New Mexico. The last earthquake within about 100 km of this epicenter with M>=4.2 occurred as an 5.4 on December 16, 2022. It is likely that today's earthquakes had its magnitude enhanced by the solar eclipse and new moon of October 14, 2023. The epicenter was at a location where the complete solar eclipse was visible for nearly five minutes around 16:42 UT (09:42 local time). This is an especially clear example of eclipse related enhanced seismicity" (October 18, 2023)

NEIC reported an aftershock of M 2.5 in Western Texas was felt with intensity up to II in the area(s) of Western Texas in Seminole and Big Spring.

A discussion of historical earthquakes in this region of Texas was provided

in this summary on December 16, 2022 as:

"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.

...

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. The "HISTORY" section of this summary has previously noted these events as:

October 16, 1931:

This was the largest historical earthquake recorded in Texas. Severe damage was located in the Valentine area where wooden buildings were extensive damaged and chimneys fell. Walls of adobe buildings and of concrete and brick walls were also collapsed. Landslides were common and well water and springs were muddied throughout the area. Felt in Oklahoma, New Mexico and northern Mexico.

June 17, 1959:

This event was felt over approximately 12,000 square miles of Oklahoma and Texas. The maximum intensity was in the Duncan, Oklahoma area (VI with damage) and Lawton OK where cracks in pavement occurred and plaster was cracked. Houses moved and many objects were observed to move. The event was accompanied by thunderous and roaring sounds. Several water mains were reported broken in Duncan.

April 14, 1995:

Two people slightly injured in Brewster county, Texas. Slight damage at Alpine and Fort Davis. Also slight damage in Marathon and Ozona area. Felt in much of western and central Texas as far east as San Antonio and the Dallas-Fort Worth area. Felt west as far as Sierra Blanca, Texas and north to Roswell, New Mexico." (December 17, 2022)

Today's event of M 5.1 in Texas had been expected in forecast 116231 to occur around September 17, 2024 within about 100 km of this epicenter.

O: 17SEP2024 00:49:41 32.4N 102.1W ML=5.1 EMSC WESTERN TEXAS

O: 17SEP2024 05:46:36 32.4N 102.0W ML=2.8 EMSC WESTERN TEXAS

P: 17SEP2024 116231 31.4N 101.8W 2.0-4.2 AAAAA SW U.S.A

An M 5.2 earthquake was felt widely in eastern Europe today. The epicenter was at an intermediate depth and the cone of felt activity extended into Ukraine, Moldova, Austria, Romania with maximum shaking V in Romania at Lumina, and Calarasi. No damage was reported. EMSC reported this event was felt with moderate intensity throughout Romania and Moldova, Ukraine, Bulgaria, Serbia, and Turkey. This is the largest earthquake since a shallow event of M 5.5-5.6 in western Romania on February 14, 2023 - an event which did considerable damage in the region. At the 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." (February 14, 2023)

The last event at intermediate depth such as today's with M>=5.2 occurred on October 28, 2018. At the time this summary noted this as:

"A moderately strong earthquake of M 5.6 hit the region of Romania today. The hypocenter in located at about 150 km depth in a piece of detached slab which is still in the process of breaking. Earthquakes of this type occasionally occur in this area and are felt lightly on the surface with a large cone of felt activity. Most of the areas reporting intensity II-IV occurred at more than 150 km from the epicenter in this cone. NEIC reports of felt activity with this quake included communities as far as 350 km from this epicenter. EMSC included more than 1400 felt reports with maximum intensity V. Among communities feeling maximum shaking from this earthquake in Romania are Valenii de Munte, Gornet Prahova, Brasov, Suhaia, Constanta, Iasi, Ramnicu, Suditi Ialomita, Pitesti, Bragadiru, Curtea de Arges, Ppoesti-Leordeni, Slobozia, Fundeni, Florest-Stoenesti, Bucharest, Dobroesti, Voluntan, Galati, Mogosoaia, Stefanestii, Buftea, Corbeanca, Marginenci, Ploiesti, Comu Parhova, Romania. It was also reported lightly felt in Bulgaria, Ukraine, Albania, Italy, and Germany.

The last earthquake in Romania with M>=5.6 occurred on December 27 and September 23, 2016. The last of M>5.6 was an M 5.9 on October 27, 2004 exactly 14 years ago. An M 7.0 also hit the region of Romania on May 30, 1990, the only other event of M>=5.6 in the region in the past 30 years. Because of the depth of these events (around 90 km) they are only felt lightly on the surface and many Romanians do not recognize that Romania is a seismic nation ..." (October 28, 2018)

The last earthquake in Romania of M>=5.2 was an M 5.5 on October 28, 2018. Forecast 116292 had expected today's event within about 50 km was likely around September 19.

O: 16SEP2024 14:40:22 45.6N 26.3E MW=5.2 EMSC ROMANIA

P: 19SEP2024 116292 46.0N 27.0E 3.0-5.1 BAAAA Romania/NW Turkey

The strongest earthquake of the day was an M 6.3 in the Saipan area of the Mariana Islands north of Guam. NEIC reported intensity II-III in the Mariana Islands at Tinian, Saipan, and in Guam at Rota, Yigo, Tamuning, Mangilao, Asan, Yona, Piti and Santa Rita. EMSC reported moderate shaking in northern Mariana Islands at Dandan, Koblerville, and in Santa Rita, Guam.

NEIC reported an earthquake of M 5.0 in Guam followed the M 6.3 in the Mariana Islands and was felt with intensity up to IV in the area(s) of Guam at Tamuning, Santa Rita, Merizo, Mangilao, Piti and MongMong. It is likely that this event was promoted by the passage of an ocean storm, a common coincidence in Guam. In the previous update this summary had noted this possibility at this time:

"A tropical weather system is forming near Guam, Mariana Islands. This is currently located over Guam at 13N 144E and tracking NNE with winds up to 23 kts. It could enhance regional seismicity in Guam while in the vicinity." (September 16, 2024)

The last earthquake in the Mariana Islands of M>=6.3 occurred on April 5, 2024 north of today's epicenter. At the time this summary noted:

"The strongest earthquake of the day was an M 6.8 in the northern Mariana Islands. NEIC reported it was felt with intensity up to IV in the Maug Islands. EMSC reported strong shaking in the Northern Mariana Islands at Kagman II, San Vicente, Dandan, San Jose, Mangilao, Guam and Kagman Vlg, Saipan. This follows a series of strong earthquakes in the area of northern Mariana Islands and Volcano Islands, Japan in the past several months including an M 6.9 on November 24, 2023 on November 24, 2023. Major earthquakes in the past 35 years hit the region at intermediate and deep focus on July 29, 2016 (M 7.7); May 14, 2013 (M 6.8); October 31, 2007 (M 7.2) and August 23, 1995 (M 7.1)." (April 5, 2024)

Forecast 116166 had expected today's M 6.3 was likely within about 100 km of the epicenter was likely around September 15, 2024.

O: 16SEP2024 11:36:33 17.1N 147.2E MW=6.3 EMSC MARIANA ISLANDS REGION

P: 15SEP2024 116166 18.0N 148.0E 4.0-5.6 AAAAA No. Marianas

O: 16SEP2024 18:12:00 13.0N 144.2E MW=5.0 EMSC GUAM REGION

P: 12SEP2024 116172 14.0N 145.0E 4.0-5.5 BAAAA So. Marianas/Guam

P: 19SEP2024 116172 12.0N 144.0E 4.0-5.5 BAAAA So. Marianas/Guam

An earthquake of M 5.5 also occurred today in Kyushu, Japan. This event occurred near local solar midnight and was probably promoted by geomagnetic and tidal stresses which maximize near this hour. This event is the strongest aftershock to day of the M 7.1 which occurred on August 8, 2024. At the time this summary noted:

"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." (August 8, 2024)

A moderately strong earthquake of M 5.5 occurred in Kyushu, Japan today. It was felt in Kagoshima and Kyushu, Japan in Kagoshima and Kanoya; in Hamamatsu, Shizuoka, Saiki, Oita and with V in Osaka, Japan. NEIC reported an aftershock of M 4.7 in Kyushu, Japan was felt with intensity up to IV in the area(s) of Kyushu, Japan in Kagoshima.

Forecast 116215 had expected today's event of M 5.5 in Kyushu was likely within about 50 km around September 17, 2024.

O: 16SEP2024 14:25:42 31.6N 131.7E mb=4.7 EMSC KYUSHU, JAPAN

O: 16SEP2024 14:13:47 31.6N 131.7E MW=5.5 EMSC KYUSHU, JAPAN

P: 17SEP2024 116215 32.0N 132.0E 3.5-5.1 AAAAA Kyushu, Japan area

An M 3.7 aftershock of the M 4.7 of September 12 occurred today in the Malibu region of Los Angeles, California. It was widely felt in the area with maximum intensity V in Malibu and Sun Valley and IV in Los Angeles and Northridge with III in Fallon, Culver City, Hawthorne, Hermosa, Lawndale and Manhattan Beach among others. There were no reported injuries or damage with this earthquake.

NEIC reported aftershocks of M 2.8 in Malibu, Southern California were felt with intensity up to IV in the area(s) of Malibu, Southern California in Agoura Hills, Westlake Village, Calabasas, Thousand Oaks, Oak Park, Newbury Park, Woodland Hills, Moorpart, Sherman Oaks, Torrance among others.

Forecast 116237 had expected today's M 3.5 was likely within about 10 km around

September 14.

O: 16SEP2024 11:22:08 34.1N 118.8W ML=3.5 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 17SEP2024 05:33:08 34.1N 118.8W ML=2.7 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 16SEP2024 14:05:22 34.0N 118.8W ML=2.7 EMSC GREATER LOS ANGELES AREA, CALI

P: 14SEP2024 116237 34.0N 118.7W 2.5-4.5 AAAAA So. California

An earthquake of M 4.5 also occurred today in the eastern Andreanof Islands, Aleutians, Alaska. NEIC reported this earthquake of M 4.5 in the Andreanof Islands, Alaska was felt with intensity up to III in the area(s) of the Andreanof Islands, Alaska in Atka. The last earthquake within about 200 km of today's epicenter with M>=4.5 occurred as an M 4.8 on July 29, 2024.

Forecast 116303 had expected today's M 4.5 within about 10 km was likely around

September 16.

O: 16SEP2024 18:52:27 51.9N 173.7W ML=3.6 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.

O: 16SEP2024 16:01:20 52.3N 173.8W mb=4.5 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.

O: 16SEP2024 19:41:01 51.1N 172.0W ML=3.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 16SEP2024 116303 52.2N 173.9W 3.5-5.0 AAAAA Andreanoff Isls, Aleutians

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 16SEP2024 20:01:03 47.4N 99.9E ML=3.7 EMSC CENTRAL MONGOLIA

P: 17SEP2024 116273 46.0N 96.0E 4.0-5.7 ABCAA Mongolia

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 16SEP2024 13:00:00 1.1N 127.9E ML=4.2 EMSC HALMAHERA, INDONESIA

P: 13SEP2024 116122 1.0N 126.0E 4.0-5.4 BABAA Mindanao, Philippines

P: 19SEP2024 116120 3.0N 127.0E 4.0-5.6 BBAAA Halmahera

O: 16SEP2024 16:53:10 2.4S 138.9E MB=4.9 EMSC PAPUA, INDONESIA

P: 16SEP2024 116146 2.0S 138.0E 4.0-5.5 AAAAA West Irian, PNG

O: 16SEP2024 22:12:38 2.7N 128.4E ML=4.3 EMSC HALMAHERA, INDONESIA

P: 12SEP2024 116120 2.0N 128.0E 4.0-5.6 BAAAA Halmahera

O: 17SEP2024 02:55:13 2.9S 141.9E MB=4.8 EMSC NEAR N COAST OF NEW GUINEA, PN

P: 15SEP2024 116139 5.0S 142.0E 4.0-5.4 ACAAA Papua New Guinea

O: 17SEP2024 05:14:23 5.0S 103.0E ML=4.0 EMSC SOUTHERN SUMATRA, INDONESIA

P: 19SEP2024 116142 4.0S 102.0E 4.0-5.4 AAAAA So. of Sumatera

O: 17SEP2024 00:28:05 5.5S 152.9E MB=4.9 EMSC NEW BRITAIN REGION, P.N.G.

P: 13SEP2024 116135 6.0S 151.0E 4.0-5.6 BABAA New Ireland

O: 16SEP2024 21:46:29 7.2S 106.1E ML=4.1 EMSC JAVA, INDONESIA

O: 16SEP2024 22:50:52 6.8S 105.7E ML=4.4 EMSC SUNDA STRAIT, INDONESIA

P: 13SEP2024 116140 7.0S 105.0E 4.0-5.5 BAAAA So. of Java

O: 17SEP2024 04:13:33 9.7N 126.6E MB=4.9 EMSC MINDANAO, PHILIPPINES

P: 18SEP2024 116121 8.0N 127.0E 4.0-5.4 ABAAA Halmahera

P: 18SEP2024 116158 11.0N 126.0E 3.5-5.1 ABAAA Luzon, Philippines

O: 16SEP2024 11:37:29 12.5N 123.6E ML=4.2 EMSC MASBATE REGION, PHILIPPINES

P: 11SEP2024 116159 13.0N 122.0E 3.5-4.9 BABAA Luzon, Philippines

O: 16SEP2024 18:12:00 13.0N 144.2E MW=5.0 EMSC GUAM REGION

P: 12SEP2024 116172 14.0N 145.0E 4.0-5.5 BAAAA So. Marianas/Guam

P: 19SEP2024 116172 12.0N 144.0E 4.0-5.5 BAAAA So. Marianas/Guam

O: 16SEP2024 11:36:33 17.1N 147.2E MW=6.3 EMSC MARIANA ISLANDS REGION

P: 15SEP2024 116166 18.0N 148.0E 4.0-5.6 AAAAA No. Marianas

CENTRAL AND SOUTH AMERICA

O: 16SEP2024 15:35:58 15.8N 94.3W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 15SEP2024 116150 17.0N 95.0W 3.5-5.2 ABAAA Chiapas, Mexico

O: 17SEP2024 05:07:47 18.2N 67.1W MD=3.0 EMSC PUERTO RICO

O: 17SEP2024 03:22:16 19.1N 67.3W MD=3.7 EMSC PUERTO RICO REGION

O: 16SEP2024 09:27:57 19.2N 67.4W MD=3.7 EMSC PUERTO RICO REGION

O: 17SEP2024 04:14:56 19.3N 67.4W MD=3.5 EMSC PUERTO RICO REGION

O: 17SEP2024 02:50:32 18.0N 66.5W MD=3.1 EMSC PUERTO RICO

P: 17SEP2024 116170 18.0N 66.0W 3.4-5.4 AAAAA Puerto Rico

O: 16SEP2024 23:41:57 18.9S 69.5W MB=4.5 EMSC TARAPACA, CHILE

P: 16SEP2024 116347 18.0S 69.0W 4.0-5.6 AAAAA So. Peru/Bolivia

O: 16SEP2024 22:57:11 21.2S 68.6W MB=4.3 EMSC ANTOFAGASTA, CHILE

P: 15SEP2024 116354 21.0S 67.0W 4.0-5.6 AABAA Argentina

O: 17SEP2024 04:25:24 22.3S 70.7W ML=4.0 EMSC OFFSHORE ANTOFAGASTA, CHILE

P: 17SEP2024 116362 20.0S 70.0W 4.0-5.5 ACAAA So. Peru/Bolivia

P: 19SEP2024 116355 24.0S 69.0W 4.0-5.5 ABBAA Coast No. Chile

O: 16SEP2024 12:51:23 23.2N 99.6W ML=4.0 EMSC TAMAULIPAS, MEXICO

O: 17SEP2024 03:06:24 26.1S 68.1W ML=4.0 EMSC CATAMARCA, ARGENTINA

P: 17SEP2024 116356 28.0S 67.0W 4.0-5.4 ABAAA Argentina

AFRICA AND EUROPE

O: 16SEP2024 13:44:44 39.4N 40.0E ML=4.0 EMSC EASTERN TURKEY

P: 15SEP2024 116253 38.0N 39.0E 3.5-5.0 ABAAA Turkey

O: 16SEP2024 14:40:22 45.6N 26.3E MW=5.2 EMSC ROMANIA

P: 19SEP2024 116292 46.0N 27.0E 3.0-5.1 BAAAA Romania/NW Turkey

O: 16SEP2024 18:11:07 65.9N 19.4W ML=3.1 EMSC ICELAND

P: 13SEP2024 116329 65.0N 17.0W 3.0-4.4 BAAAA Iceland area

O: 17SEP2024 04:11:01 72.2N 0.9E ML=4.0 EMSC NORWEGIAN SEA

P: 19SEP2024 116335 72.0N 0.0E 3.0-4.5 AAAAA Norway

SOUTHWEST PACIFIC

O: 16SEP2024 18:42:48 23.6S 180.0E MB=4.6 EMSC SOUTH OF FIJI ISLANDS

P: 16SEP2024 116367 25.0S 179.0E 4.0-5.6 ABAAA Tonga/Fiji

O: 17SEP2024 01:31:16 25.7S 179.5W MB=5.1 EMSC SOUTH OF FIJI ISLANDS

P: 19SEP2024 116366 25.0S 179.0W 4.0-5.7 AAAAA Tonga Islands

NEIC reported an earthquake of M 5.4 in Vanuatu was felt with intensity up to IV in the area(s) of Vanuatu in Vila Shefa.

OCEAN RIDGES

O: 16SEP2024 10:23:40 41.2S 91.1W MB=5.0 EMSC SOUTHEAST OF EASTER ISLAND

P: 16SEP2024 116377 41.0S 88.0W 4.0-5.5 AACAA Chile Rise

P: 25SEP2024 166370 41.0S 91.0W 4.0-5.8 CAAAA Chile Rise

ZEALANDIA AND AUSTRALIA REGION

O: 16SEP2024 12:27:35 47.4S 165.8E MB=4.4 EMSC OFF W. COAST OF S. ISLAND, N.Z

O: 16SEP2024 12:27:34 47.4S 165.5E ML=5.0 GEONET So. Island, N.Z.

P: 14SEP2024 116380 45.0S 167.0E 3.0-5.1 ACAAA So. Island, N.Z.

GEONET reported this earthquake was felt weakly by 1 and lightly by 1 respondent in Southern South Island and in Snares Island, New Zealand.

JAPAN AND KURIL ISLANDS

O: 16SEP2024 14:25:42 31.6N 131.7E mb=4.7 EMSC KYUSHU, JAPAN

O: 16SEP2024 14:13:47 31.6N 131.7E MW=5.5 EMSC KYUSHU, JAPAN

P: 17SEP2024 116215 32.0N 132.0E 3.5-5.1 AAAAA Kyushu, Japan area

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 16SEP2024 11:22:08 34.1N 118.8W ML=3.5 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 17SEP2024 05:33:08 34.1N 118.8W ML=2.7 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 16SEP2024 14:05:22 34.0N 118.8W ML=2.7 EMSC GREATER LOS ANGELES AREA, CALI

P: 14SEP2024 116237 34.0N 118.7W 2.5-4.5 AAAAA So. California

O: 16SEP2024 08:38:43 32.2N 115.2W ML=2.0 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2024 116233 31.5N 115.4W 2.5-4.7 BAAAA So. California

O: 17SEP2024 06:47:58 32.9N 115.5W ML=2.4 EMSC SOUTHERN CALIFORNIA

P: 17SEP2024 116234 33.0N 115.9W 2.5-4.5 AAAAA So. California

O: 16SEP2024 23:02:04 35.0N 117.0W ML=2.6 EMSC SOUTHERN CALIFORNIA

P: 13SEP2024 116241 35.1N 117.0W 2.5-4.6 BAAAA So. California

O: 16SEP2024 22:50:55 35.9N 120.9W MD=2.1 EMSC CENTRAL CALIFORNIA

O: 16SEP2024 11:48:45 35.7N 120.7W ML=2.5 EMSC CENTRAL CALIFORNIA

P: 19SEP2024 116228 35.8N 121.3W 2.5-4.8 BAAAA Off So. California

O: 16SEP2024 13:35:53 36.7N 121.3W MD=2.0 EMSC CENTRAL CALIFORNIA

P: 14SEP2024 116204 36.7N 121.4W 2.5-4.8 AAAAA Central California

O: 16SEP2024 11:15:49 37.7N 119.4W MD=1.9 EMSC CENTRAL CALIFORNIA

O: 16SEP2024 12:10:41 37.7N 119.4W MD=2.3 EMSC CENTRAL CALIFORNIA

P: 15SEP2024 116198 37.3N 119.4W 2.5-5.1 AAAAA California/Nevada area

O: 16SEP2024 14:32:15 38.8N 122.8W MD=2.0 EMSC NORTHERN CALIFORNIA

O: 16SEP2024 23:00:57 38.8N 122.8W MD=2.2 EMSC NORTHERN CALIFORNIA

O: 16SEP2024 13:58:07 38.8N 122.7W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 14SEP2024 116206 38.8N 122.8W 2.5-4.6 AAAAA Central California

ALASKA

O: 16SEP2024 18:52:27 51.9N 173.7W ML=3.6 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.

O: 16SEP2024 16:01:20 52.3N 173.8W mb=4.5 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.

O: 16SEP2024 19:41:01 51.1N 172.0W ML=3.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 16SEP2024 116303 52.2N 173.9W 3.5-5.0 AAAAA Andreanoff Isls, Aleutians

O: 16SEP2024 18:13:02 52.5N 179.0W MB=4.6 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 14SEP2024 116303 51.0N 179.9W 3.5-5.1 ABAAA Andreanoff Isls, Aleutians

O: 16SEP2024 21:10:55 56.5N 147.9W ML=3.1 EMSC GULF OF ALASKA

P: 7SEP2024 166055 55.0N 149.0W 3.0-5.0 CBAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 16SEP2024 21:09:02 47.2N 121.9W ML=2.0 EMSC WASHINGTON

P: 13SEP2024 116298 47.5N 121.8W 2.0-4.0 BAAAA Washington state, U.S.

O: 16SEP2024 08:27:50 51.4N 130.6W ML=3.1 EMSC HAIDA GWAII REGION

O: 16SEP2024 16:08:01 51.3N 130.8W MB=4.5 ECAN OF PORT HARDY, BC

O: 16SEP2024 12:50:20 51.5N 131.0W MB=3.8 ECAN OF PORT HARDY, BC

O: 16SEP2024 08:27:50 51.4N 130.6W MB=3.1 ECAN OF PORT HARDY, BC

O: 16SEP2024 01:27:36 51.3N 130.8W MB=4.6 ECAN OF PORT HARDY, BC

O: 16SEP2024 00:32:09 51.3N 130.7W MB=3.8 ECAN OF PORT HARDY, BC

O: 16SEP2024 12:50:20 51.5N 131.0W ML=3.8 EMSC HAIDA GWAII REGION

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 BAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 16SEP2024 20:06:15 31.6N 104.0W ML=2.0 EMSC WESTERN TEXAS

O: 16SEP2024 23:49:31 31.6N 104.1W ML=2.8 EMSC WESTERN TEXAS

O: 16SEP2024 07:54:58 31.7N 104.5W ML=2.1 EMSC WESTERN TEXAS

P: 14SEP2024 116231 31.4N 104.5W 2.0-4.2 AAAAA SW U.S.A

O: 17SEP2024 00:49:41 32.4N 102.1W ML=5.1 EMSC WESTERN TEXAS

O: 17SEP2024 05:46:36 32.4N 102.0W ML=2.8 EMSC WESTERN TEXAS

P: 17SEP2024 116231 31.4N 101.8W 2.0-4.2 AAAAA SW U.S.A

EASTERN U.S./CANADA

O: 16SEP2024 18:47:15 29.5N 99.0W ML=2.1 EMSC SOUTHERN TEXAS

P: 17SEP2024 116186 28.0N 98.0W 3.0-4.7 ABAAA Northern Mexico

O: 16SEP2024 00:26:06 50.7N 95.3W MB=3.6 ECAN OF BISSETT, MB

HAWAII

O: 16SEP2024 11:45:31 19.7N 157.1W MD=3.6 EMSC HAWAIIAN ISLANDS REGION

P: 18SEP2024 116181 20.1N 156.1W 4.0-5.4 AAAAA Hawaii area

STRONG EARTHQUAKE SHAKES QUEEN CHARLOTTE ISLANDS, CANADA

EARTHQUAKE SUMMARY FOR SEPTEMBER 15, 2024

The strongest earthquake in the world today was an M 6.5 in the Queen Charlotte Islands area of British Columbia, Canada. The mainshock was reported by NEIC to have been felt with intensity up to III in Washington State in Seattle, and in Portland Oregon and possibly as far as California. A foreshock of M 4.5 occurred 43 minutes before the mainshock but was not reported felt. No tsunami threat was issued with this earthquake. Aftershocks were reported felt with light intensity in British Columbia, Canada. This earthquake occurred near the time of the full moon near local solar noon and was probably promoted by energy associated with strong tidal stresses as noted in previous issues of this summary:

Two other factors probably influenced the timing of the M 6.5 in Vancouver today. These include landfall of Tropical Cyclone Eight off South Carolina and an X4.8 solar flare which occurred yesterday. This flare was described in the previous update of this summary as:

"A strong X4.3 solar flare occurred today with the following parameters from SWPC. This is the strongest solar flare since an X5.8 on May 11, 2024 (#1680).

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

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

1830 1513 1529 1547 X4.5 (September 14, 2024) 5.8E-01

When the X5.8 occurred on May 11, 2024 occurred this summary noted:

"It was followed at the end of the flare by an M 4.6 earthquake in Southern Alaska. This earthquake was reported by EMSC to have been felt with light to moderate intensity in Southern Alaska at Anchor Point and Anchorage." (May 11, 2024)

Similar earthquakes in Alaska occurred in the hours following this flare as

an M 5.0 in Western Andreanof Islands, Alaska; an M 4.3 near Tatitlek, Alaska in Southern Alaska and an M 3.2 and several associated quakes near Perryville, Alaska.

This flare was followed by an M 4.4 in Hawaii with foreshocks and aftershocks and an M 3.8 in Western Texas with a number of minor aftershocks. An M 5.3 in Guam occurred at a longitude which was at local solar midnight when this flare peaked and may have been promoted by Solar Flare Effects (SFE)." (September 15, 2024)

This earthquake in Queen Charlotte Island occurred as Tropical Storm Eight made slopefall off of South Carolina. Earthquakes in Vancouver and Queen Charlotte Islands often appear to be triggered by landfall of strong ocean storms on the east coast of the U.S. A brief summary was provided by this report when an M 5.5 in Vancouver occurred a year ago on September 17, 2023 as:

"The strongest earthquake in the world today was an M 5.6-5.9 west of Vancouver Island, British Columbia, Canada. NEIC reported it was felt with light shaking I-III in British Columbia at Parksville, Gibsons, Vancouver and perhaps as far as Oregon and Northern California. Foreshocks of M 4.5 and 4.3 preceded the mainshock and may have been felt lightly in the epicentral area.

This enhanced seismicity in British Columbia, Canada had been anticipated in this summary in the past several issues. It began two days ago with a strong series of moderate quakes as described at the time in this summary:

"A series of light to moderate earthquake with maximum events of M 4.2 occurred today in the region near Vancouver, British Columbia, Canada. These events centered near local solar noon and were probably promoted by the new moon tidal stresses today which maximized near this time

…

and continued in the previous issues of this summary as:

"The strong swarm of earthquakes yesterday in the area of Vancouver Island, British Columbia ceased abruptly today with only a minor earthquake recorded in the area. This swarm coincided with landfall of Hurricane Lee in Maine and Nova Scotia, Canada. This storm has been called a summer "nor'easter" because of its strength and characteristics. This summary has taken a clear stance on the likely connection between nor'easters and coincidental major activity in the northwestern U.S. and southwestern Canada as typified by the summary of January 29, 2022:

" ... a major nor'easter is beginning to progress up the eastern coast of the U.S. It may hit the Boston area with record snows today and on Saturday, January 29, 2022. Such nor'easters are often associated with a strong enhancement of seismicity along the western North American tectonic plate. A precautionary seismic watch is being called by this summary for this region through February 2, 2022." (January 27, 2022)

and more recently:

"The strongest earthquakes in the U.S. or Canada today occurred as an M 4.3

near Vancouver Island and as an M 3.8 in the Queen Charlotte Islands area of British Columbia. These were not reported felt. This may related to a nor'easter hitting the northeastern U.S. at this time. Larger earthquakes in the Vancouver and Queen Charlotte Island area of Canada often occur in conjunction with strong nor'easters on the opposite side of the North American Plate." (March 14, 2023)

A stronger earthquake in the Vancouver or Queen Charlotte region is possible with landfall of Hurricane Lee today in Nova Scotia and Newfoundland.

Hurricane Lee has been described in this and previous issues of this summary as:

"Hurricane Lee continued today in the area of north of Nova Scotia with winds up to 50 kts (category 1 hurricane). It is expected to track to the north and east and may enhance seismicity in the Northeast U.S and Quebec, Canada as it makes landfall in that area around of Nova Scotia on September 17 in the next week. Interactions with the North American Plate may also trigger moderate to strong seismic enhancement in areas of coastal western Canada and northwestern U.S. at this time. Coastal flooding in Maine is considered marginal by NHC but more intense effects are possible along the coasts of eastern Canada." (September 16-17, 2023)

The last earthquake of M>=5.9 within about 100 km of today's epicenters in Vancouver was an M 6.3 on December 25, 2019, part of a series of events in the area that started with two of M 6.0 on December 23, 2019. At the time this summary noted:

"Other factors which probably affected the timing of the activity in Vancouver, Canada probably included strong meteorological storms which dropped up to 12 inches on areas of the southeast U.S. and in Washington State and British Columbia and the geomagnetic storm of December 19-20.

...

The last earthquake in the Vancouver Island area of M>=6 was an M 6.5 on July 4, 2019 with the regional seismic activation of early July, 2019. A swarm hit southeast of today's events on October 22, 2018 (M 6.8, 6.5, 6.5) and in January, 2008 (M 6.4, 6.0 ..) and September 2013 (M 6.0, 6.0, 6.1)." (December 23, 2019, September 17, 2023)

Forecasts 116304 had expected enhanced seismicity within about 100 km of today's event of M 6.5 was likely around September 14-20 in the area of British Columbia.

O: 15SEP2024 23:26:46 51.3N 131.0W MB=4.5 ECAN WSW OF BELLA BELLA, BC

O: 15SEP2024 22:22:50 51.6N 130.7W Mw=6.5 EMSC QUEEN CHARLOTTE ISLANDS REGION

O: 15SEP2024 21:39:56 51.7N 130.7W mb=4.5 EMSC QUEEN CHARLOTTE ISLANDS REGION

O: 15SEP2024 22:22:47 51.7N 130.6W MB=6.0 ECAN W OF BELLA BELLA, BC

O: 16SEP2024 01:43:28 51.4N 130.9W MW=4.7 EMSC QUEEN CHARLOTTE ISLANDS REGION

P: 14SEP2024 116304 50.3N 130.2W 3.0-5.1 ABAAA British Colombia

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 BAAAA British Colombia

An M 2.5 earthquake occurred today in South Carolina. NEIC reported it was widely felt with intensity up to IV in Southeastern U.S. including IV in Lugoff, SC and II-III in Elgin, Columbia, Camden, Ridgeway, Blythewood. This earthquake may have been triggered by stresses associated with Tropical Cyclone 8 which made slopefall about the time this earthquake occurred as noted in this an previous issues of this summary:

"Tropical Cyclone Eight formed off the coast of South Carolina today with winds up to 60 kts. It is expected to move inland and to dissipate over South Carolina and North Carolina in the next several days. Landfall on the Continental slope may have helped trigger the M 6.5 in Vancouver, BC at the same time. This has been seen on previous occasions and commented on in this summary." (September 16, 2024)

and

"A minor storm may be forming off the coast of South Carolina. This system may intensify and threaten high surge in South Carolina and minor earthquakes. It is currently located at 32N 79W with winds up to 40 kts." (September 15, 2024)

Forecast 116246 had expected today's earthquake in South Carolina was likely within about 50 km around September 12, 2024.

O: 15SEP2024 22:01:44 34.2N 80.7W ML=2.6 EMSC SOUTH CAROLINA

P: 12SEP2024 116246 34.0N 80.0W 2.0-4.7 BAAAA Southeast U.S.

An unusual earthquake of M 5.5 was also recorded in Indonesia today in the region of Kalimantan. NEIC reported maximum intensity V in Kalimantan at Tanjung Redeb and IV in Bontang. BMG reported it was felt with intensity IV in Karangan, Kutai Timur, Maratua, Berau, Kalimantan Timur and III in Kab. Berau, Kutai with lesser shaking in Samarinda, Bontang, Bulungan, Malinau, Tarakan, Donggala and Toli Toli, Indonesia. NEIC reported this earthquake of M 4.7 in Samar, Philippines was felt with intensity up to II in the area(s) of Samar, Philippines at Sagpon, Bicol. The last earthquake of M>=5.5 in the Kalimantan area of Indonesia within about 200 km of this M 5.5 today was located by NEIC with M 6.1 on March 6, 1995.

Forecast 166114 had expected today's event within about 150 km was likely around September 22, 2024.

O: 15SEP2024 13:08:09 1.3N 118.5E Mw=5.5 EMSC KALIMANTAN, INDONESIA

O: 15SEP2024 13:39:06 1.3N 118.4E ML=4.0 EMSC KALIMANTAN, INDONESIA

O: 15SEP2024 11:28:54 1.3N 118.5E ML=4.0 EMSC KALIMANTAN, INDONESIA

P: 22SEP2024 166114 1.0N 120.0E 4.0-5.5 CAAAA Celebes Sea

The strongest earthquake in the U.S. or Canada today was an M 5.0 in the western Andreanof Islands, Aleutians, Alaska. NEIC reported this earthquake of M 5.0 in the western Andreanof Islands was not felt. The last earthquake of M>=5.0 in the western Andreanof Islands wa an M 5.0 on February 29, 2024. The last event of significantly larger magnitude within about 200 km of today's epicenter occurred as an M 6.4 on October 16. 2023. At the time this summary noted:

"The strongest earthquake in the world today (including the U.S. or Canada) was an M 6.4-6.7 in the Central Andreanof Islands, Aleutians, Alaska. NEIC reported two events of M 6.4 and 6.7 at this time which were felt with intensity V in Adak and II-III in Atka and possibly as far as Anchorage and Wasilla, Alaska. This event occurred within minutes of local solar midnight and was probably promoted by the new moon and solar eclipse of October 14 which began near this epicenter

...

Forecast 116303 had expected today's earthquake in the western Andreanof Islands within about 100 km of this epicenter was likely around September 14, 2024.

O: 15SEP2024 12:41:03 52.2N 179.8W MW=5.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 14SEP2024 116303 51.0N 179.9W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 15SEP2024 14:17:08 22.8N 94.0E ML=4.3 EMSC MYANMAR-INDIA BORDER REGION

P: 12SEP2024 116184 23.0N 94.0E 4.0-5.5 BAAAA Myanmar

O: 15SEP2024 15:01:09 52.7N 160.2E MB=3.9 EMSC OFF EAST COAST OF KAMCHATKA

P: 16SEP2024 116308 52.0N 159.0E 4.0-5.9 AAAAA Kamchatka

INDONESIA AND PHILIPPINES

O: 15SEP2024 13:08:09 1.3N 118.5E Mw=5.5 EMSC KALIMANTAN, INDONESIA

O: 15SEP2024 13:39:06 1.3N 118.4E ML=4.0 EMSC KALIMANTAN, INDONESIA

O: 15SEP2024 11:28:54 1.3N 118.5E ML=4.0 EMSC KALIMANTAN, INDONESIA

P: 22SEP2024 166114 1.0N 120.0E 4.0-5.5 CAAAA Celebes Sea

O: 15SEP2024 19:06:32 3.6N 127.8E ML=4.3 EMSC KEPULAUAN TALAUD, INDONESIA

P: 19SEP2024 116120 3.0N 127.0E 4.0-5.6 BAAAA Halmahera

O: 15SEP2024 12:35:20 2.8S 141.8E mb=4.5 EMSC NEAR N COAST OF NEW GUINEA, PNG.

O: 15SEP2024 11:15:17 4.1S 141.8E MB=4.9 EMSC NEW GUINEA, PAPUA NEW GUINEA

P: 15SEP2024 116139 5.0S 142.0E 4.0-5.4 AAAAA Papua New Guinea

O: 15SEP2024 15:40:05 5.7N 126.6E ML=4.1 EMSC MINDANAO, PHILIPPINES

P: 17SEP2024 116120 5.0N 128.0E 4.0-5.4 AABAA Halmahera

O: 15SEP2024 09:54:34 7.5S 106.6E MW=5.0 EMSC JAVA, INDONESIA

P: 13SEP2024 116140 7.0S 105.0E 4.0-5.5 AABAA So. of Java

NEIC reported this earthquake of M 5.0 in Java, Indonesia was felt with intensity up to V in the area(s) of Java, Indonesia in Leuwiliang and II-III in Padalarang, Cikeruh, Bekasi, Karawang.

EMSC reported this earthquake in Java was felt with light to moderate intensity in Bogor Selatan, Setu, Cidadap., Bandung, Buahbatu, Lembang, Tawang, Arcamanik.

O: 16SEP2024 00:17:40 10.3S 123.1E ML=4.0 EMSC TIMOR REGION, INDONESIA

P: 26SEP2024 166338 10.0S 124.0E 4.0-5.5 CAAAA Flores Island area

O: 16SEP2024 03:29:09 12.4N 123.6E MB=4.7 EMSC MASBATE REGION, PHILIPPINES

P: 11SEP2024 116159 13.0N 122.0E 3.5-4.9 BABAA Luzon, Philippines

O: 16SEP2024 03:47:41 15.5N 146.0E MB=4.6 EMSC SAIPAN REG., N. MARIANA ISLAND

P: 12SEP2024 116172 14.0N 145.0E 4.0-5.5 BBAAA So. Marianas/Guam

CENTRAL AND SOUTH AMERICA

O: 15SEP2024 07:08:03 13.0N 90.1W ML=4.1 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 20:18:51 13.0N 90.0W ML=4.4 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 07:34:02 13.1N 90.0W ML=4.0 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 09:04:14 13.1N 90.0W ML=4.0 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 10:18:09 13.1N 90.0W ML=4.3 EMSC OFFSHORE EL SALVADOR

P: 13SEP2024 116151 13.0N 90.0W 3.5-5.3 AAAAA Guatemala

O: 15SEP2024 11:29:23 8.5S 74.7W MB=4.4 EMSC CENTRAL PERU

P: 12SEP2024 116127 8.0S 74.0W 3.5-5.2 BAAAA Brazil

O: 15SEP2024 10:55:28 12.6N 88.3W ML=4.3 EMSC OFFSHORE EL SALVADOR

P: 13SEP2024 116151 13.0N 90.0W 3.5-5.3 AABAA Guatemala

O: 15SEP2024 11:46:34 13.2N 87.7W ML=3.9 EMSC GOLFO DE FONSECA, EL SALVADOR

P: 11SEP2024 116151 14.0N 89.0W 3.5-5.8 BAAAA Coast of Central America

O: 15SEP2024 09:50:18 15.3N 94.6W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 17SEP2024 116150 15.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 16SEP2024 01:23:30 16.3N 93.3W ML=4.3 EMSC CHIAPAS, MEXICO

P: 20SEP2024 116151 16.0N 92.0W 3.5-5.1 BABAA Guatemala

O: 15SEP2024 22:12:20 17.7N 103.3W ML=4.1 EMSC OFFSHORE MICHOACAN, MEXICO

P: 13SEP2024 116162 18.0N 104.0W 3.5-5.4 AAAAA Michoacan, Mexico

O: 15SEP2024 15:09:28 18.1N 66.5W MD=3.3 EMSC PUERTO RICO

O: 15SEP2024 20:17:21 18.0N 66.8W MD=3.1 EMSC PUERTO RICO

P: 17SEP2024 116170 18.0N 66.0W 3.4-5.4 AAAAA Puerto Rico

O: 16SEP2024 01:43:00 18.4N 100.8W ML=4.0 EMSC GUERRERO, MEXICO

P: 16SEP2024 116161 19.0N 102.0W 3.5-5.1 AAAAA Michoacan, Mexico

P: 19SEP2024 116161 17.0N 101.0W 3.5-5.3 BBAAA Michoacan, Mexico

O: 15SEP2024 19:17:25 19.4N 69.0W ML=3.4 EMSC DOMINICAN REPUBLIC REGION

P: 15SEP2024 116171 19.0N 69.0W 3.4-4.9 AAAAA Puerto Rico

O: 15SEP2024 20:10:54 19.6N 64.3W MD=4.0 EMSC VIRGIN ISLANDS REGION

P: 10SEP2024 165881 19.0N 64.0W 3.0-5.0 BAAAA Leeward Islands

O: 15SEP2024 22:44:06 19.6N 68.1W MD=3.4 EMSC DOMINICAN REPUBLIC REGION

P: 15SEP2024 116171 19.0N 69.0W 3.4-4.9 AAAAA Puerto Rico

O: 15SEP2024 13:32:48 23.0N 109.7W ML=3.7 EMSC BAJA CALIFORNIA SUR, MEXICO

P: 17SEP2024 116180 24.0N 109.0W 3.5-5.1 AAAAA Gulf of California

AFRICA AND EUROPE

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 15SEP2024 08:07:49 17.3S 167.8E MB=4.9 EMSC VANUATU

P: 16SEP2024 116353 17.0S 168.0E 4.0-5.4 AAAAA Vanuatu Islands

NEIC reported this earthquake of M 4.9 in Vanuatu was felt with intensity up to IV in the area(s) of Vanuatu in Vila Shefa.

O: 15SEP2024 09:47:34 18.5S 178.8W MB=4.1 EMSC FIJI REGION

P: 14SEP2024 116349 18.0S 177.0W 4.0-5.7 AABAA Tonga Islands

O: 15SEP2024 16:19:46 20.2S 177.7W MB=4.0 EMSC FIJI REGION

P: 13SEP2024 116364 21.0S 178.0W 4.0-5.4 AAAAA Tonga Islands

O: 16SEP2024 05:12:21 20.8S 169.3E MW=5.4 EMSC VANUATU

P: 12SEP2024 116357 21.0S 169.0E 4.0-5.7 BAAAA Loyalty Islands

P: 15SEP2024 116357 22.0S 170.0E 4.0-5.7 ABAAA Loyalty Islands

O: 15SEP2024 11:47:36 25.8S 179.5W MB=4.4 EMSC SOUTH OF FIJI ISLANDS

P: 15SEP2024 116366 24.0S 180.0W 4.0-5.7 ABAAA Tonga Islands

P: 19SEP2024 116366 25.0S 179.0W 4.0-5.7 BAAAA Tonga Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 15SEP2024 18:34:47 41.9S 178.7E MS=5.3 GEONET Off E. Coast of N. Island, New Zealand

O: 15SEP2024 18:34:47 41.9S 178.7E MB=4.6 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 12SEP2024 116379 41.0S 176.0E 3.0-5.0 BABAA So. Island, N.Z.

P: 16SEP2024 116379 40.0S 176.0E 3.0-4.5 ABBAA North Island, N.Z.

GEONET noted 7 people reported feeling this earthquake with 6 at weak intensity and 0 with light shaking and 0 with moderate intensity 0 with strong, 0 with severe and 1 with extreme intensity.

JAPAN AND KURIL ISLANDS

O: 15SEP2024 16:51:32 35.9N 140.1E MB=4.6 EMSC NEAR EAST COAST OF HONSHU,

P: 13SEP2024 116226 35.0N 140.0E 4.0-5.4 AAAAA Off East Coast Honshu

NEIC reported this earthquake of M 4.6 in Tokyo, Japan was felt with intensity up to IV in the area(s) of Tokyo, Japan at Komae and Matsudo, Chiba.

O: 15SEP2024 17:14:24 43.3N 144.5E MB=4.3 EMSC HOKKAIDO, JAPAN REGION

P: 16SEP2024 116266 43.0N 147.0E 3.5-5.5 AABAA Hokkaido, Japan

NEIC reported this earthquake of M 4.3 in Hokkaido, Japan was felt with intensity up to II in the area(s) of Hokkaido, Japan in Nakashibetsu.

O: 16SEP2024 04:31:09 47.6N 154.3E MB=4.7 EMSC KURIL ISLANDS

P: 19SEP2024 116276 49.0N 155.0E 3.5-5.5 BBAAA NE Pacific

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 15SEP2024 08:25:56 31.9N 116.5W ML=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 11SEP2024 116233 32.1N 116.4W 2.5-4.6 BAAAA So. California

O: 15SEP2024 19:00:46 34.1N 118.8W ML=2.3 EMSC GREATER LOS ANGELES AREA, CALI

P: 14SEP2024 116237 34.0N 118.7W 2.5-4.5 AAAAA So. California

O: 16SEP2024 00:16:38 38.3N 122.2W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 14SEP2024 116206 38.8N 122.8W 2.5-4.6 AAAAA Central California

O: 15SEP2024 17:50:05 39.2N 123.4W MD=2.7 EMSC NORTHERN CALIFORNIA

P: 15SEP2024 116283 40.0N 123.0W 2.5-4.6 AAAAA Northern California

P: 18SEP2024 116207 39.6N 123.4W 2.5-4.7 BAAAA Central California

NEIC reported this earthquake of M 2.9 in Northern California was felt with intensity up to II in the area(s) of Northern California in Comptche, Philo and Redwood Valley.

O: 16SEP2024 02:55:34 40.2N 121.2W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 16SEP2024 116202 39.4N 120.5W 2.5-4.5 AAAAA Central California

O: 15SEP2024 22:21:00 40.5N 124.4W MD=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 16SEP2024 02:55:46 40.5N 124.9W MD=2.9 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 16SEP2024 04:07:07 40.4N 124.5W MD=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 13SEP2024 116284 40.3N 124.7W 2.5-4.5 BAAAA Off Coast of No. Calif

P: 19SEP2024 116284 40.2N 124.2W 2.5-4.4 BAAAA Off Coast of No. Calif

ALASKA

O: 15SEP2024 12:41:03 52.2N 179.8W MW=5.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 14SEP2024 116303 51.0N 179.9W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians

O: 15SEP2024 09:22:28 59.1N 154.5W ML=3.4 EMSC SOUTHERN ALASKA

P: 14SEP2024 116323 60.1N 153.4W 3.2-5.1 AAAAA Central Alaska

O: 15SEP2024 15:17:04 60.7N 146.9W MB=4.4 EMSC SOUTHERN ALASKA

P: 12SEP2024 116321 60.1N 148.4W 3.2-5.1 BAAAA Central Alaska

P: 20SEP2024 116321 60.1N 147.1W 3.2-5.2 BAAAA Central Alaska

NEIC reported this earthquake of M 4.3 in Southern Alaska was felt with intensity up to IV in the area(s) of Southern Alaska in Anchorage, Elmendorf AFB, Valdez, Girdwood, Seward, Moose Pass, Eagle River, Chugiak, Wasilla, Homer.

No events of M>=3 were located in Alaska today.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 15SEP2024 12:27:52 47.6N 121.8W ML=2.5 EMSC WASHINGTON

P: 13SEP2024 116298 47.5N 121.8W 2.0-4.0 AAAAA Washington state, U.S.

NEIC reported this earthquake of M 2.5 in Northern Washington State was felt with intensity up to II-III in the area(s) of Northern Washington State in Carnation, North Bend, Renton, Snohomish, Seattle, Arlington and in Vancouver, British Columbia, Canada.

O: 15SEP2024 23:26:46 51.3N 131.0W MB=4.5 ECAN WSW OF BELLA BELLA, BC

O: 15SEP2024 22:22:50 51.6N 130.7W Mw=6.5 EMSC QUEEN CHARLOTTE ISLANDS REGION

O: 15SEP2024 21:39:56 51.7N 130.7W mb=4.5 EMSC QUEEN CHARLOTTE ISLANDS REGION

O: 15SEP2024 22:22:47 51.7N 130.6W MB=6.0 ECAN W OF BELLA BELLA, BC

O: 16SEP2024 01:43:28 51.4N 130.9W MW=4.7 EMSC QUEEN CHARLOTTE ISLANDS REGION

P: 14SEP2024 116304 50.3N 130.2W 3.0-5.1 ABAAA British Colombia

P: 20SEP2024 116304 52.0N 132.0W 3.0-4.9 BAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 15SEP2024 11:44:56 31.0N 103.2W ML=2.1 EMSC WESTERN TEXAS

O: 15SEP2024 11:43:34 31.2N 103.7W ML=2.1 EMSC WESTERN TEXAS

O: 16SEP2024 00:22:52 31.2N 103.1W ML=2.2 EMSC WESTERN TEXAS

O: 15SEP2024 15:03:47 31.6N 103.9W ML=2.0 EMSC WESTERN TEXAS

O: 16SEP2024 05:07:33 31.6N 104.0W ML=2.2 EMSC WESTERN TEXAS

O: 16SEP2024 05:10:45 31.6N 104.0W ML=2.2 EMSC WESTERN TEXAS

O: 15SEP2024 07:01:14 31.7N 104.2W ML=2.1 EMSC WESTERN TEXAS

O: 16SEP2024 01:51:24 30.9N 103.2W ML=2.5 EMSC WESTERN TEXAS

P: 14SEP2024 116231 31.4N 104.5W 2.0-4.2 AAAAA SW U.S.A

O: 15SEP2024 17:02:53 42.1N 112.5W ML=3.0 EMSC SOUTHERN IDAHO

P: 16SEP2024 116300 43.2N 111.0W 2.0-4.0 ABAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 15SEP2024 22:01:44 34.2N 80.7W ML=2.6 EMSC SOUTH CAROLINA

P: 12SEP2024 116246 34.0N 80.0W 2.0-4.7 BAAAA Southeast U.S.

O: 15SEP2024 09:12:45 35.5N 84.6W MD=2.3 EMSC EASTERN TENNESSEE

P: 13SEP2024 116246 34.0N 85.0W 2.0-3.9 ABAAA Southeast U.S.

HAWAII

O: 15SEP2024 23:15:40 19.4N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

P: 17SEP2024 116155 19.2N 155.2W 3.0-4.4 AAAAA Hawaii

NEIC reported this earthquake of M 3.1 in Hawaii was felt with intensity up to IV in the area(s) of Hawaii in Hilo with II-III shaking in Captain Cook, Naalehu and Kailua Kona.

STRONGEST SOLAR FLARE SINCE MAY, 2024 ENHANCES SEISMICITY

EARTHQUAKE SUMMARY FOR SEPTEMBER 14, 2024

A strong X4.5 solar flare occurred today with the following parameters from SWPC. This is the strongest solar flare since an X5.8 on May 11, 2024 (#1680).

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

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

1830 1513 1529 1547 X4.5 (September 14, 2024) 5.8E-01

When the X5.8 occurred on May 11, 2024 occurred this summary noted:

Similar earthquakes in Alaska occurred in the hours following this flare as

an M 5.0 in Western Andreanof Islands, Alaska; an M 4.3 near Tatitlek, Alaska in Southern Alaska and an M 3.2 and several associated quakes near Perryville, Alaska. The strongest of these was an M 4.6 which occurred near the time of this solar flare south of Alaska in the same area as the May 11, 2024 event.

The last earthquake within about 200 km of today's epicenter with M>=4.6 occurred on July 23, 2024 and April 19, 2024 - both with M 4.6. The last of significantly larger magnitude in this region was an M 5.0 on January 10, 2023. At the time this summary noted:

"The strongest earthquake felt in the U.S. or Canada today was an M 4.5 in southeastern Alaska. NEIC reported it was felt with intensity III in Yakutat, Alaska. This is the strongest earthquake in southeastern Alaska within about 150 km of this epicenter since an M 5.1 on September 29, 2022. At the time of the April event this summary noted:

"The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Alaska Peninsula. It was not reported felt in the area. This is the strongest earthquake in the Alaska Peninsula within about 200 km of this epicenter since an M 4.6 on June 16, 2023. The last of larger magnitude occurred a year ago on April 24, 2023 with M 4.8." (April 19, 2024)

Forecasts 116318 and 166304 had expected enhanced seismicity in this area was

likely in mid-September.

O: 14SEP2024 16:48:28 54.7N 156.7W ML=3.4 EMSC SOUTH OF ALASKA

O: 15SEP2024 05:52:22 54.7N 156.7W ML=3.2 EMSC SOUTH OF ALASKA

O: 14SEP2024 14:33:43 54.9N 157.0W mb=4.6 EMSC SOUTH OF ALASKA

O: 14SEP2024 14:05:50 54.4N 159.6W ML=3.8 EMSC SOUTH OF ALASKA

P: 12SEP2024 116318 54.1N 162.8W 3.5-5.0 AABAA Unimak Islands, Aleutians

P: 23SEP2024 166304 54.8N 158.7W 3.5-4.9 CAAAA Alaska Peninsula

This flare was followed by an M 4.4 in Hawaii with foreshocks and aftershocks and an M 3.8 in Western Texas with a number of minor aftershocks.

The strongest earthquake in the U.S. or Canada today was an M 4.4 in Hawaii near Kilauea Volcano. It was accompanied by a series of minor shocks both before and after the mainshock in Oklahoma. NEIC reported it was felt with maximum intensity V in Hawaii at Hawaii National Park and II-III in Hilo, Mountain View, Pahoa, Kurtistown, Keaau, Naalehu, Kailua Kona and Honokaa. EMSC reported the mainshock was felt as a light tremor in Hawaii at Volcano and Pepeekeo. Other earthquakes in Hawaii of M>=4.4 in the current year occurred on August 22, 2024 (M 4.7) and February 9, 2024 (M 5.7). At the time of the August, 2024 event this summary noted:

"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 feltin 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

...

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 loud 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, August 22, 2024)

Forecast 116155 had expected enhanced seismicity in Hawaii was likely around September 13, 2024.

O: 15SEP2024 02:25:06 19.4N 155.3W ML=4.4 EMSC ISLAND OF HAWAII, HAWAII

O: 15SEP2024 05:11:42 19.4N 155.2W MD=3.0 EMSC ISLAND OF HAWAII, HAWAII

O: 14SEP2024 23:22:04 19.4N 155.3W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

P: 13SEP2024 116155 18.8N 155.2W 3.0-4.4 AAAAA Hawaii

The strongest earthquake of the day was reported at M 5.7 by BMG in Sumatra following this flare. It may have been promoted by effects from the X4.5 flare.

BMG reported this earthquake of M 5.7 in Sumatra was felt with intensity up to IV in the area(s) of Sumatra at Lumut, Tapanuli Tengah and III in Sibabangun,m Badiri, Lumut and Onan Ganhang in Kab Humband. Also reported with intensity II in Kabs Aceh, Timur, Subulussalam, Tapanuli, Nias, Langkat, Karo, Deli Serdang, Simalungun, Asahan, Labuhanbatu, Dairi, Toba Samosir, Mandailing Netal, among others. NEIC reported this earthquake of M 5.1 in Northern Sumatra was felt with intensity up to IV in the area(s) of Northern Sumatra in Pematang, Siantar, Indonesia.

Forecast 116124 had expected this activity within about 200 km was likely

in mid-September, 2024.

O: 14SEP2024 21:37:38 1.9N 99.1E MB=5.1 EMSC NORTHERN SUMATRA, INDONESIA

O: 14SEP2024 21:37:38 1.9N 99.1E MB=5.7 BMG NORTHERN SUMATRA, INDONESIA

P: 16SEP2024 116124 0.0N 99.0E 4.0-5.6 ABAAA So. Sumatera

P: 18SEP2024 116124 1.0N 97.0E 4.0-5.4 BABAA Nicobar Islands

An M 5.3 in Guam occurred at a longitude which was at local solar midnight when this flare peaked and may have been promoted by Solar Flare Effects (SFE). The strongest earthquake of the day was an M 5.3 in Guam. NEIC reported it was felt with intensity V in Guam at Hagatna Hts; IV in Hagatna, Yona, Santa Rita, Mangilao, Piti, Sinajana and III in Tamuning, Dededo, and Asan. EMSC reported it was felt as a jolt in Guam at Santa Rita, with violent shaking in Mangilao and Tamuning. Forecast 116172 had expected this event within about 100 km was likely around September 12.

O: 14SEP2024 11:41:34 13.1N 144.2E MB=5.3 EMSC GUAM REGION

P: 12SEP2024 116172 14.0N 145.0E 4.0-5.5 AAAAA So. Marianas/Guam

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 14SEP2024 07:36:17 22.9N 121.1E ML=4.1 EMSC TAIWAN REGION

P: 18SEP2024 116191 23.0N 121.0E 4.0-5.4 BAAAA Taiwan

O: 15SEP2024 00:17:51 23.1N 120.3E ML=4.0 EMSC TAIWAN

P: 15SEP2024 116192 24.0N 122.0E 4.0-5.6 AABAA Taiwan

P: 18SEP2024 116191 23.0N 121.0E 4.0-5.4 BAAAA Taiwan

O: 14SEP2024 18:21:42 29.9N 82.0E MB=4.4 EMSC NEPAL

P: 12SEP2024 116256 30.0N 80.0E 3.8-5.3 AABAA Xizang

O: 15SEP2024 04:39:38 51.5N 96.2E MB=4.2 EMSC SOUTHWESTERN SIBERIA, RUSSIA

P: 11SEP2024 116316 51.0N 98.0E 3.0-4.4 BABAA So. Siberia

No significant (M>=5) or unusual earthquakes were reported in Asia today.

INDONESIA AND PHILIPPINES

O: 14SEP2024 21:37:38 1.9N 99.1E MB=5.1 EMSC NORTHERN SUMATRA, INDONESIA

O: 14SEP2024 21:37:38 1.9N 99.1E MB=5.7 BMG NORTHERN SUMATRA, INDONESIA

P: 16SEP2024 116124 0.0N 99.0E 4.0-5.6 ABAAA So. Sumatera

P: 18SEP2024 116124 1.0N 97.0E 4.0-5.4 BABAA Nicobar Islands

O: 14SEP2024 19:49:32 4.6S 101.9E ML=4.4 EMSC SOUTHERN SUMATRA, INDONESIA

P: 19SEP2024 116142 4.0S 102.0E 4.0-5.4 BAAAA So. of Sumatera

O: 14SEP2024 20:40:14 6.0N 127.3E ML=4.0 EMSC PHILIPPINE ISLANDS REGION

P: 7SEP2024 165843 6.0N 126.0E 4.0-5.4 CAAAA Mindanao, Philippines

O: 14SEP2024 10:56:47 6.3N 92.2E MB=4.9 EMSC NICOBAR ISLANDS, INDIA REGION

P: 19SEP2024 116125 8.0N 94.0E 4.0-5.5 BBBAA Nicobar Islands

O: 14SEP2024 14:25:53 6.4N 126.4E ML=4.0 EMSC MINDANAO, PHILIPPINES

P: 18SEP2024 116121 8.0N 127.0E 4.0-5.4 BBAAA Halmahera

O: 14SEP2024 11:41:34 13.1N 144.2E MB=5.3 EMSC GUAM REGION

P: 12SEP2024 116172 14.0N 145.0E 4.0-5.5 AAAAA So. Marianas/Guam

CENTRAL AND SOUTH AMERICA

O: 15SEP2024 02:00:15 13.1N 89.9W MB=4.6 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 05:10:40 13.1N 90.0W ML=4.1 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 04:58:37 13.2N 89.8W Mw=5.2 EMSC OFFSHORE EL SALVADOR

O: 15SEP2024 05:16:05 13.2N 89.8W mb=4.9 EMSC OFFSHORE EL SALVADOR

P: 13SEP2024 116151 13.0N 90.0W 3.5-5.3 AAAAA Guatemala

NEIC reported this earthquake of M 5.2 in El Salvador was felt with intensity up to IV in the area(s) of El Salvador in Concepcion de Ataco Ahuachapan and Nuevo Cuscatlan and II-III in El Salvador at Nueva San Salvador, Antiguo Cuscatlan, Quezaltepuque and in San Salvador at Mejicanos, Soyapango, Chinameca and in Guatemala City, and Misco, Guatemala.

NEIC reported an aftershock of M 4.7 in El Salvador was felt with intensity up to IV in the area(s) of El Salvador in Antiguo Cuscatlan, La Libertad.

EMSC reported strong shaking in El Salvador at Soyapango, Chalchuapa, Santa Ana and in Guatemala at Colonia Valles De Vista Hermosa, Antigua and Jocotenango.

O: 15SEP2024 06:12:01 14.8N 93.4W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 11SEP2024 116150 14.0N 94.0W 3.5-5.1 BAAAA Chiapas, Mexico

O: 14SEP2024 13:55:19 15.6N 92.5W ML=4.0 EMSC CHIAPAS, MEXICO

P: 8SEP2024 165877 16.0N 92.0W 3.5-5.1 CAAAA Guatemala

O: 14SEP2024 12:51:53 15.8N 96.4W ML=4.0 EMSC OAXACA, MEXICO

P: 14SEP2024 116168 15.0N 97.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 14SEP2024 10:05:50 16.4N 100.0W ML=4.2 EMSC OFFSHORE GUERRERO, MEXICO

P: 19SEP2024 116169 17.0N 100.0W 3.5-5.5 BAAAA Oaxaca, Mexico

O: 14SEP2024 21:27:36 18.7N 65.1W MD=3.3 EMSC VIRGIN ISLANDS REGION

O: 14SEP2024 19:05:17 19.7N 64.6W MD=3.9 EMSC VIRGIN ISLANDS REGION

P: 10SEP2024 165881 19.0N 64.0W 3.0-5.0 BAAAA Leeward Islands

O: 14SEP2024 07:26:29 17.6N 67.9W MD=3.4 EMSC PUERTO RICO REGION

O: 14SEP2024 09:38:33 17.6N 67.9W MD=3.4 EMSC PUERTO RICO REGION

O: 14SEP2024 10:10:48 18.3N 67.9W MD=3.3 EMSC MONA PASSAGE, PUERTO RICO

O: 14SEP2024 22:58:00 19.7N 68.2W MD=3.6 EMSC DOMINICAN REPUBLIC REGION

P: 15SEP2024 116171 19.0N 69.0W 3.4-4.9 AAAAA Puerto Rico

O: 15SEP2024 02:54:59 27.4S 67.2W MW=4.8 EMSC CATAMARCA, ARGENTINA

P: 17SEP2024 116356 28.0S 67.0W 4.0-5.4 AAAAA Argentina

O: 14SEP2024 08:02:35 32.3S 71.7W MB=4.3 EMSC OFFSHORE VALPARAISO, CHILE

P: 12SEP2024 116369 32.0S 69.0W 4.0-5.7 AABAA Central Chile

NEIC reported this earthquake of M 4.3 in Valparaiso, Chile was felt with intensity up to IV in the area(s) of Valparaiso, Chile in Puchuncavi.

AFRICA AND EUROPE

O: 14SEP2024 18:47:43 42.8N 7.3E MB=4.3 EMSC WESTERN MEDITERRANEAN SEA

P: 14SEP2024 116259 45.0N 7.0E 3.0-5.3 ACAAA Austria

NEIC reported this earthquake of M 4.3 in France was felt with intensity up to IV in the area(s) of France in Provence-Alpes-cote-d' Azur at Ramatuelle, Frejus and La Colle-sur-Loup.

EMSC reported strong shaking in France in Cavalaire-sur-Mer, Hyeres, Gassin, Sainte-Maxime, Saint-Raphael, Grimaud, Frejus, Le Plan-de-al-Tour, Le Lavandou, among others.

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 15SEP2024 04:31:51 20.5S 177.8W MB=4.3 EMSC FIJI REGION

P: 15SEP2024 116364 22.0S 179.0W 4.0-5.5 ABAAA Tonga Islands

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia

today.

JAPAN AND KURIL ISLANDS

O: 15SEP2024 04:35:08 25.9N 125.1E MB=4.4 EMSC SOUTHWESTERN RYUKYU ISL., JAPA

P: 15SEP2024 116187 26.0N 125.0E 4.0-5.4 AAAAA Ryukyu Islands

O: 14SEP2024 19:40:57 38.5N 142.2E MB=4.7 EMSC NEAR EAST COAST OF HONSHU,

P: 14SEP2024 116245 38.0N 143.0E 4.0-5.4 AAAAA So. of Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 14SEP2024 12:15:19 33.6N 119.3W ML=2.3 EMSC CHANNEL ISLANDS REG., CALIFORN

P: 14SEP2024 116235 33.6N 118.5W 2.5-4.7 AAAAA So. California

O: 14SEP2024 23:20:55 35.1N 117.1W ML=2.5 EMSC SOUTHERN CALIFORNIA

P: 13SEP2024 116241 35.1N 117.0W 2.5-4.6 AAAAA So. California

O: 14SEP2024 17:36:05 36.0N 120.6W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 12SEP2024 116203 36.1N 120.2W 2.5-4.8 AAAAA Central California

O: 14SEP2024 17:19:07 36.6N 121.2W MD=2.2 EMSC CENTRAL CALIFORNIA

P: 14SEP2024 116204 36.7N 121.4W 2.5-4.8 AAAAA Central California

O: 14SEP2024 15:17:08 37.6N 120.1W MD=2.4 EMSC CENTRAL CALIFORNIA

P: 15SEP2024 116198 37.3N 119.4W 2.5-5.1 AAAAA California/Nevada area

O: 14SEP2024 21:54:04 38.0N 118.8W ML=3.2 EMSC CENTRAL CALIFORNIA

P: 11SEP2024 116200 38.2N 118.8W 2.5-4.8 BAAAA California/Nevada area

P: 15SEP2024 116200 38.4N 118.7W 2.5-4.8 AAAAA California/Nevada area

NEIC reported this earthquake of M 3.2 in Central California was felt with intensity up to II-III in the area(s) of Central California in Lee Vining, Placerville.

ALASKA

O: 14SEP2024 16:48:28 54.7N 156.7W ML=3.4 EMSC SOUTH OF ALASKA

O: 15SEP2024 05:52:22 54.7N 156.7W ML=3.2 EMSC SOUTH OF ALASKA

O: 14SEP2024 14:33:43 54.9N 157.0W mb=4.6 EMSC SOUTH OF ALASKA

O: 14SEP2024 14:05:50 54.4N 159.6W ML=3.8 EMSC SOUTH OF ALASKA

P: 12SEP2024 116318 54.1N 162.8W 3.5-5.0 AABAA Unimak Islands, Aleutians

P: 23SEP2024 166304 54.8N 158.7W 3.5-4.9 CAAAA Alaska Peninsula

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 14SEP2024 10:02:10 47.8N 122.3W ML=2.1 EMSC SEATTLE-TACOMA AREA, WASHINGTO

P: 7SEP2024 166018 47.7N 120.3W 2.0-4.1 CAAAA Washington state, U.S.

NEIC reported an earthquake of M 2.8 off the coast of Oregon was felt with intensity up to IV in the area(s) of Oregon in Bandon, Coos Bay and Grants Pass.

ROCKY MOUNTAINS REGION

O: 14SEP2024 17:04:56 31.6N 104.5W ML=2.7 EMSC WESTERN TEXAS

O: 14SEP2024 17:06:07 31.6N 104.5W ML=2.0 EMSC WESTERN TEXAS

O: 14SEP2024 17:03:13 31.7N 104.5W ML=2.8 EMSC WESTERN TEXAS

O: 14SEP2024 17:46:13 31.7N 104.1W ML=2.0 EMSC WESTERN TEXAS

O: 14SEP2024 17:01:06 31.6N 104.5W ML=3.7 EMSC WESTERN TEXAS

P: 14SEP2024 116231 31.4N 104.5W 2.0-4.2 AAAAA SW U.S.A

NEIC reported this earthquake of M 3.9 in Western Texas was felt with intensity up to III in the area(s) of Western Texas in Salt Flat and Pecos and in Artesia, New Mexico.

O: 14SEP2024 05:50:18 41.4N 106.8W ML=3.4 EMSC WYOMING

P: 13SEP2024 116262 40.6N 106.6W 2.0-4.1 AAAAA Colorado area

NEIC reported this earthquake of M 3.4 in Wyoming was felt with intensity up to IV in the area(s) of Wyoming in Encampment and Saratoga and in Utah at Salt Lake City and Ogden.

EASTERN U.S./CANADA

O: 14SEP2024 18:46:53 34.1N 80.7W ML=2.1 EMSC SOUTH CAROLINA

P: 12SEP2024 116246 34.0N 80.0W 2.0-4.7 AAAAA Southeast U.S.

HAWAII

O: 15SEP2024 02:25:06 19.4N 155.3W ML=4.4 EMSC ISLAND OF HAWAII, HAWAII

O: 15SEP2024 05:11:42 19.4N 155.2W MD=3.0 EMSC ISLAND OF HAWAII, HAWAII

O: 14SEP2024 23:22:04 19.4N 155.3W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

P: 13SEP2024 116155 18.8N 155.2W 3.0-4.4 AAAAA Hawaii

MODERATE EARTHQUAKE AMONG TYPHOONS IN KYUSHU, JAPAN

EARTHQUAKE SUMMARY FOR SEPTEMBER 13, 2024

The strongest earthquake in the world today was an M 5.7 in the region of the northern Ryukyu Islands, Japan. NEIC reported it was felt with intensity II-III in Kaogshima, Japan at Kagoshima, Kanoya and Naze and in Shizuoka at Hamamatsu. It is likely that this earthquake was promoted by energy associated with Tropical Storm Bebinca which is currently passing near this epicenter as noted in this and previous issues of this summary:

"Tropical Storm Bebinca (Depression 14W) continued today west northern Mariana Islands with winds up to 50 kts. It is expected to track to the north and west becoming a Typhoon as it passes over the Ryukyu Island, Japan around September 15. Enhancement of seismicity in southern Japan and Guam is likely with this storm in the next week." (September 11-14, 2024)

and

"Typhoon Bebinca (Depression 14W) continued today over the northern Ryukyu Islands, Japan. It is expected to track to the north and west a Typhoon as it passes over the Ryukyu Island, Japan around September 15. Enhancement of seismicity in southern Japan and Guam is likely with this storm in the next week.: (September 14, 2024)

This earthquake of M 5.7 in the Ryukyu Islands is the strongest within about 200 km of this epicenter since an M 5.9 on April 15, 2024. At the time this summary noted:

"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. It is the strongest in the northern Ryukyu Islands within about 200 km of this epicenter since an M 6.1 on December 9, 2021. At the time this summary noted:

"The strongest earthquake in the world today was an M 6.0 in the northern Ryukyu Islands, Japan. NEIC reported maximum shaking with this event of VI in Nago, Okinawa with IV in Naha, Okinawa and in Kagoshima at Naze, Nishinoomote and lesser shaking in Ibusuki and Kanoya, Kagoshima and in Hirara, Okinawa, Japan.

The last earthquake of M>=6 within about 150 km of this epicenter in the Ryukyu Islands was an M 6.7 on November 13, 2015. An M 6.6 and an M 6.1 about 150 km to the west of this occurred at intermediate depths on June 13, 2020 and July 13, 2019 but because of their depths are not considered possible foreshocks." (December 9, 2021, April 15, 2024)

Forecast 116215 had expected this event in this region was likely around September 13, 2024.

O: 13SEP2024 23:03:41 29.8N 130.9E MW=5.7 EMSC RYUKYU ISLANDS, JAPAN

P: 13SEP2024 116215 30.0N 129.0E 3.5-4.9 AABAA Kyushu, Japan area

A light M 3.4 earthquake was widely felt in the area of Central California near San Francisco, California today continuing the enhanced seismicity in California in early September. NEIC reported this earthquake was felt with intensity II-IV in the San Francisco Bay area f California in Los Altos, Menlo Park, Belmont, Burlingame, Half Moon Bay, Daly City, Salinas, and in Nevada. Some concern has been expressed that recent earthquakes in California point to stresses that could trigger a major or strong regional event at this time. This summary has been clear on many occasions on this possibility beginning with the January 1, 2024 issue. The coincidence of moderate earthquake in mid-August and mid-September, 2024 near Los Angeles with the past two major geomagnetic storms suggests that such an event is most likely when the current X-class solar flare producers return to earth-effective positions on the sun in mid-October, a time when seismicity frequently sees peaks is regional activity in California.

Forecasts 116205 had expected enhanced seismicity in the region of San Francisco was likely around September 13-17, 2024.

O: 13SEP2024 22:15:47 37.4N 121.8W ML=3.4 ANSS SAN FRANCISCO BAY AREA, CALIF.

O: 13SEP2024 22:15:47 37.4N 121.8W ML=3.1 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 13SEP2024 116205 37.1N 121.5W 2.5-4.8 AAAAA Central California

P: 17SEP2024 116205 37.3N 121.6W 2.5-4.6 BAAAA Central California

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 13SEP2024 18:29:55 31.5N 86.6E MB=4.9 EMSC WESTERN XIZANG

P: 19SEP2024 116257 31.0N 88.0E 3.8-5.3 CABAA Xizang

O: 13SEP2024 12:27:23 33.6N 85.3E MB=4.6 EMSC WESTERN XIZANG

O: 13SEP2024 10:01:08 33.8N 82.2E MB=4.6 EMSC WESTERN XIZANG

P: 13SEP2024 116257 34.0N 89.0E 3.8-5.6 AACAA Xizang

O: 13SEP2024 17:32:16 41.3N 78.4E MB=4.4 EMSC KYRGYZSTAN

P: 15SEP2024 116270 41.0N 78.0E 4.0-5.4 AAAAA Kirgizstan/Xinjiang

NEIC reported this earthquake of M 4.4 in Xinjiang, China was felt with intensity up to IV in the area(s) of Kyrgyzstan at Almaty, Kazakhstan.

INDONESIA AND PHILIPPINES

O: 13SEP2024 07:02:28 9.1S 110.4E ML=4.2 EMSC SOUTH OF JAVA, INDONESIA

O: 13SEP2024 17:19:52 9.2S 110.4E mb=4.6 EMSC SOUTH OF JAVA, INDONESIA

O: 13SEP2024 22:00:00 9.4S 110.3E mb=4.7 EMSC SOUTH OF JAVA, INDONESIA

O: 13SEP2024 07:12:48 8.7S 110.8E MB=4.5 EMSC JAVA, INDONESIA

P: 12SEP2024 116141 9.0S 110.0E 4.0-5.4 AAAAA So. of Java

O: 13SEP2024 17:31:25 5.0N 126.8E MB=4.7 EMSC KEPULAUAN TALAUD, INDONESIA

P: 16SEP2024 116123 4.0N 126.0E 4.0-5.6 BAAAA Mindanao, Philippines

O: 13SEP2024 18:51:47 6.4S 148.7E MB=4.7 EMSC NEW BRITAIN REGION, P.N.G.

P: 13SEP2024 116134 6.0S 146.0E 4.0-5.4 AACAA New Ireland

O: 13SEP2024 13:13:38 8.4N 127.1E ML=4.3 EMSC PHILIPPINE ISLANDS REGION

P: 16SEP2024 116115 9.0N 126.0E 4.0-5.5 BAAAA Central Philippines

O: 13SEP2024 20:53:35 8.6S 118.4E ML=4.3 EMSC SUMBAWA REGION, INDONESIA

P: 7SEP2024 165865 8.0S 119.0E 4.0-5.4 CAAAA Sumbawa Island area

O: 14SEP2024 01:31:07 8.8S 115.5E MB=4.6 EMSC BALI REGION, INDONESIA

P: 7SEP2024 165859 9.0S 113.0E 4.0-5.6 CACAA So. of Bali

NEIC reported this earthquake of M 4.6 in Bali, Indonesia was felt with intensity up to II-III in the area(s) of Bali, Indonesia in Denpasar, Klungkung, Kuta, Ubud, and in Tenggara Barat at Mataram, Praya Nusa.

EMSC reported moderate shaking in Bali at Nusa Penida, Denpasar, Kuta, Ubud.

O: 14SEP2024 03:08:01 11.1N 138.7E MB=4.7 EMSC STATE OF YAP, MICRONESIA

P: 6SEP2024 165869 10.0N 138.0E 3.5-4.9 CBAAA Caroline Islands

O: 13SEP2024 09:22:52 11.7N 95.0E MB=4.7 EMSC ANDAMAN ISLANDS, INDIA REGION

P: 13SEP2024 116148 11.0N 92.0E 4.0-5.5 AACAA Andaman Islands

O: 13SEP2024 22:01:48 17.9N 119.7E MB=4.6 EMSC PHILIPPINE ISLANDS REGION

P: 13SEP2024 116159 16.0N 120.0E 3.5-5.1 ABAAA Luzon, Philippines

O: 13SEP2024 07:49:51 21.7N 143.8E MB=4.5 EMSC MARIANA ISLANDS REGION

P: 16SEP2024 116193 21.0N 144.0E 4.0-5.6 BAAAA Volcano Islands

CENTRAL AND SOUTH AMERICA

O: 13SEP2024 22:15:12 12.7N 88.3W ML=4.1 EMSC OFFSHORE EL SALVADOR

O: 13SEP2024 22:34:15 13.1N 90.0W ML=4.0 EMSC OFFSHORE EL SALVADOR

O: 13SEP2024 21:21:12 13.2N 89.9W MW=4.9 EMSC OFFSHORE EL SALVADOR

P: 13SEP2024 116151 13.0N 90.0W 3.5-5.3 AAAAA Guatemala

NEIC reported this earthquake of M 4.9 in El Salvador was felt with intensity up to IV in the area(s) of El Salvador in Acajutla and Antiguo Cuscatlan, La Libertad.

O: 13SEP2024 15:15:11 13.4S 74.7W MB=4.8 EMSC CENTRAL PERU

P: 15SEP2024 116339 14.0S 73.0W 4.0-5.7 AABAA Central Peru

O: 13SEP2024 19:58:19 17.4N 94.7W ML=4.2 EMSC VERACRUZ, MEXICO

P: 15SEP2024 116150 17.0N 95.0W 3.5-5.2 AAAAA Chiapas, Mexico

O: 13SEP2024 07:03:30 17.6N 101.5W ML=4.2 EMSC OFFSHORE GUERRERO, MEXICO

P: 15SEP2024 116161 17.0N 102.0W 3.5-5.2 AAAAA Michoacan, Mexico

O: 13SEP2024 08:20:04 18.0N 74.8W ML=3.1 EMSC HAITI REGION

P: 17SEP2024 116177 20.0N 73.0W 3.0-4.8 BBBAA Bahamas/No. Caribbean

O: 13SEP2024 10:36:58 18.5N 69.1W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 15SEP2024 116171 19.0N 69.0W 3.4-4.9 AAAAA Puerto Rico

O: 13SEP2024 18:35:14 23.0N 109.7W ML=3.3 EMSC BAJA CALIFORNIA SUR, MEXICO

P: 17SEP2024 116180 24.0N 109.0W 3.5-5.1 BAAAA Gulf of California

O: 13SEP2024 09:07:30 25.0S 66.8W ML=4.1 EMSC SALTA, ARGENTINA

P: 13SEP2024 116354 23.0S 67.0W 4.0-5.6 ABAAA Argentina

AFRICA AND EUROPE

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 14SEP2024 02:03:00 15.3S 168.1E MW=5.1 EMSC VANUATU

P: 15SEP2024 116352 16.0S 168.0E 4.0-5.4 AAAAA Vanuatu Islands

O: 14SEP2024 06:34:37 18.2S 178.0W MB=4.1 EMSC FIJI REGION

P: 14SEP2024 116349 18.0S 177.0W 4.0-5.7 AAAAA Tonga Islands

OCEAN RIDGES

O: 13SEP2024 15:47:04 14.4N 53.3E MB=4.5 EMSC OWEN FRACTURE ZONE REGION

P: 14SEP2024 116154 15.0N 54.0E 3.5-4.9 AAAAA Gulf of Aden

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

ZEALANDIA AND AUSTRALIA REGION

O: 14SEP2024 03:20:33 34.4S 178.9W mb=5.0 EMSC SOUTH OF KERMADEC ISLANDS

O: 13SEP2024 08:23:56 35.2S 179.3W MW=5.0 EMSC EAST OF NORTH ISLAND, N.Z.

P: 14SEP2024 116372 37.0S 179.0W 3.5-5.0 ABAAA E. of North Islands N.Z.

O: 13SEP2024 14:41:22 35.6S 178.1E ML=4.4 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 7SEP2024 166102 37.0S 177.0E 3.0-4.4 CBAAA North Island, N.Z.

JAPAN AND KURIL ISLANDS

O: 13SEP2024 23:59:35 24.0N 123.2E MB=4.9 EMSC SOUTHWESTERN RYUKYU ISL., JAPA

P: 11SEP2024 116192 24.0N 123.0E 4.0-5.6 AAAAA Taiwan

O: 13SEP2024 23:03:41 29.8N 130.9E MW=5.7 EMSC RYUKYU ISLANDS, JAPAN

P: 13SEP2024 116215 30.0N 129.0E 3.5-4.9 AABAA Kyushu, Japan area

O: 14SEP2024 04:46:07 42.7N 142.7E MB=4.4 EMSC HOKKAIDO, JAPAN REGION

P: 19SEP2024 116266 42.0N 143.0E 3.5-5.6 BAAAA Hokkaido, Japan

O: 13SEP2024 20:46:39 46.9N 152.9E MB=4.4 EMSC KURIL ISLANDS

P: 11SEP2024 116294 45.0N 152.0E 3.5-5.6 ABAAA So. Kurils

P: 11SEP2024 116294 47.0N 151.0E 3.5-5.4 AABAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 13SEP2024 09:47:06 31.4N 115.5W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2024 116233 31.5N 115.4W 2.5-4.7 AAAAA So. California

O: 13SEP2024 13:00:15 33.3N 116.9W ML=2.2 EMSC SOUTHERN CALIFORNIA

P: 10SEP2024 165956 33.4N 116.7W 2.5-4.4 BAAAA So. California

O: 13SEP2024 18:37:25 34.0N 116.7W ML=2.0 EMSC SOUTHERN CALIFORNIA

P: 10SEP2024 165956 33.4N 116.7W 2.5-4.4 BAAAA So. California

O: 13SEP2024 23:34:08 34.1N 118.8W ML=2.5 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 14SEP2024 01:48:31 34.1N 118.8W ML=2.3 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 13SEP2024 11:56:38 34.0N 118.8W ML=3.0 EMSC CHANNEL ISLANDS REG., CALIFORN

P: 12SEP2024 116238 34.3N 118.5W 2.5-4.6 AAAAA So. California

P: 14SEP2024 116237 34.0N 118.7W 2.5-4.5 AAAAA So. California

NEIC reported these light earthquake aftershocks of M 2.6-3.1 in Southern California was felt with intensity up to II-III in the area(s) of Southern California in Malibu, Newbury Park, Thousand Oaks, Westlake Village, Thousand Oks, Fullerton and Camarillo among others.

O: 13SEP2024 07:44:22 35.7N 117.5W ML=2.0 EMSC SOUTHERN CALIFORNIA

P: 13SEP2024 116242 35.9N 117.7W 2.5-4.6 AAAAA So. California

O: 13SEP2024 12:21:51 36.0N 120.6W MD=2.7 EMSC CENTRAL CALIFORNIA

O: 14SEP2024 01:54:01 36.2N 120.3W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 12SEP2024 116203 36.1N 120.2W 2.5-4.8 AAAAA Central California

O: 13SEP2024 18:12:51 37.1N 121.5W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 13SEP2024 116205 37.1N 121.5W 2.5-4.8 AAAAA Central California

O: 14SEP2024 04:34:52 37.4N 118.5W MD=2.6 EMSC CENTRAL CALIFORNIA

P: 13SEP2024 116199 37.5N 118.6W 2.5-4.8 AAAAA California/Nevada area

O: 13SEP2024 22:15:47 37.4N 121.8W ML=3.5 ANSS SAN FRANCISCO BAY AREA, CALIF.

O: 13SEP2024 22:15:47 37.4N 121.8W ML=3.1 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 13SEP2024 116205 37.1N 121.5W 2.5-4.8 AAAAA Central California

P: 17SEP2024 116205 37.3N 121.6W 2.5-4.6 BAAAA Central California

O: 13SEP2024 11:35:48 37.7N 117.1W ML=2.6 EMSC NEVADA

P: 15SEP2024 116197 37.7N 117.2W 2.5-4.7 AAAAA California/Nevada area

O: 14SEP2024 02:27:46 40.3N 127.1W ML=2.9 EMSC OFF COAST OF NORTHERN CALIFORN

P: 8SEP2024 166005 40.3N 127.2W 2.5-4.4 CAAAA Off Coast of No. Calif

O: 13SEP2024 22:26:21 40.5N 124.2W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 13SEP2024 116284 40.3N 124.7W 2.5-4.5 AAAAA Off Coast of No. Calif

ALASKA

O: 13SEP2024 11:14:53 60.7N 152.9W ML=3.3 EMSC SOUTHERN ALASKA

P: 14SEP2024 116323 60.1N 153.4W 3.2-5.1 AAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 14SEP2024 04:55:00 43.4N 126.9W ML=2.8 EMSC OFF COAST OF OREGON

P: 13SEP2024 116285 43.1N 126.5W 3.0-4.5 AAAAA Off Coast of Oregon

O: 13SEP2024 09:12:00 48.5N 120.0W ML=2.6 EMSC WASHINGTON

P: 19SEP2024 116298 47.7N 120.3W 2.0-4.2 CAAAA Washington state, U.S.

NEIC reported this earthquake of M 2.6 in Washington State was felt with intensity up to I in the area(s) of Washington State in Winthrop.

ROCKY MOUNTAINS REGION

O: 14SEP2024 03:51:06 31.7N 104.5W ML=2.5 EMSC WESTERN TEXAS

P: 14SEP2024 116231 31.4N 104.5W 2.0-4.2 AAAAA SW U.S.A

O: 13SEP2024 08:00:53 32.4N 102.1W ML=2.1 EMSC WESTERN TEXAS

P: 17SEP2024 116231 31.4N 101.8W 2.0-4.2 BAAAA SW U.S.A

O: 14SEP2024 05:50:18 41.4N 106.8W ML=3.4 EMSC WYOMING

P: 13SEP2024 116262 40.6N 106.6W 2.0-4.1 AAAAA Colorado area

EASTERN U.S./CANADA

O: 14SEP2024 06:34:15 28.5N 98.5W ML=2.1 EMSC SOUTHERN TEXAS

O: 14SEP2024 04:37:05 28.5N 98.4W ML=2.5 EMSC SOUTHERN TEXAS

P: 13SEP2024 116186 28.0N 99.0W 3.0-4.5 AAAAA Northern Mexico

O: 13SEP2024 14:15:14 35.9N 95.1W ML=2.1 EMSC OKLAHOMA

P: 16SEP2024 116247 35.0N 96.0W 2.0-4.1 BAAAA Southern Plains

O: 13SEP2024 11:58:18 36.5N 89.6W MD=2.2 EMSC SOUTHEASTERN MISSOURI

P: 12SEP2024 116219 36.7N 89.7W 2.0-4.3 AAAAA New Madrid area

O: 12SEP2024 09:03:14 66.6N 94.7W MB=3.4 ECAN OF AMARUQ MINE, NU

HAWAII

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

MODERATE QUAKE SHAKES LOS ANGELES WITH GEOMAGNETIC STORM

EARTHQUAKE SUMMARY FOR SEPTEMBER 12, 2024

The strongest earthquake in the U.S. or Canada today was an M 4.7 in the region of Los Angeles, California. NEIC received nearly 20,000 felt reports from residents of Southern California. These included reports of intensity V in Malibu, Agoura Hills, Westlake Village, Thousand Oaks, and IV in Calabasas, Oak Park, Newbury Park, West Hills, Woodland Hills, Camarillo, Canoga Park, Simi Valley, Winnetka, Tarzamna, Santa Monica, Moorpark, Santa Monica, Encino, Reseda, Northridge, Los Angeles, Sherman Oaks, Van Nuys, Somis, Marina del Rey, Beverly Hills, Studio City, Valley Village, North Hollywood, Universal City, Hermosa Beach among others. Intensity III was felt as far as 150 km from the epicenter in places such as San Bernardino and Camp Pendleton, California with II shaking as far as 600 km from the epicenter in Arizona, Nevada, Oregon and Colorado among others. The last earthquake in the Los Angeles with M>=4.7 within about 100 km of today's M 4.7 epicenter occurred as an M 5.1 on August 20, 2023 and prior to that an M 5.1 on March 29, 2014 and M 4.7 on May 18, 2009, the last such event in the Simi Valley near Los Angeles.

Light aftershocks, including an M 3.4 were felt with intensity up to IV in Southern California in Malibu, Agoura Hills, Westlake Village, Calabasas, Oak Park, Thousand Oaks, Newbury Park, Woodland Hills, Camarillo, Simi Valley, Northridge, Los Angeles and as far as 200 km from the epicenter in Ludlow and San Diego. NEIC reported an earthquake of M 2.9 in Southern California was felt with intensity up to III in the area(s) of Southern California in Del Mar.

The last earthquake near today's epicenter with M>=4.5 was an M 4.6 on February 9, 2024. At the time this summary noted:

"The moderate earthquake of M 4.6-4.7 was widely felt in the region of Los Angeles, California today. Press reports indicate it was felt by more than a million residents in the area of western Los Angeles and the San Fernando Valley to Malibu, California with maximum intensity up to V in Los Angeles. EMSC reported very strong shaking in Los Angeles, California at Westlake Village, Agoura Hills, Thousand Oaks, Oak Park, Casa Conejo, Newbury Park, Calabasas, Moorpark, Camarillo, Simi Valley, Woodland Hills, Canoga Park, Winnetka, Chatsworth, Northridge, Reseda, Tarzana, Chatsworth and as far as Dana Point, Loma Linda, Hesperia, and in Winterhaven and Yuma, Arizona. Many smaller aftershocks were felt in the same area. Minor damage was reported in Los Angeles. This included some minor damage to structures and the temporary closure of regional theme parks such as Disneyland rides.

This was the strongest earthquake in the Los Angeles, CA area since an M 5.1 on August 20, 2023 and an M 5.3 on April 5, 2018 and is near the epicenter of the Northridge earthquake of M 6.7 of January 17, 1994 and the M 6.8 in San Fernando Valley of February 9, 1971. Active seismicity in this region at this time was first proposed in this summary following the M 6.3 earthquake in New Guinea of December 31, 2023 as:

"The strongest earthquake of the day was an M 6.3 in the region of West Irian, New Guinea. NEIC reported it was felt with intensity up to VI in the epicentral area near Abepura, Indonesia.

...

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)

Since that time this summary has expanded this watch following the M 7.1 in

Xinjiang, China of January 22, 2024. Since that event significant earthquakes have been recorded near 103 degrees from that epicenter in Vanuatu, Florida, Oklahoma, Melbourne, Australia, the Central Atlantic, and Hawaii among others. This was expected in the issue of January 22, 2024 as:

"Areas most likely to see enhanced seismicity at distance from today's event in China lie near 103 and 144 degrees from that epicenter and include at 103 degrees Central California, Oklahoma, Hawaii ..." (January 22, 2024)

and has been emphasized in many more recent summaries. Today's event follows a series of light regional earthquakes which have put residents on notice that a stronger earthquake may be imminent. For example on January 25, 2024 an M 4.2 shook eastern Los Angeles and was described in part in this summary as:

"A moderate earthquake of M 4.2 was widely felt with some minor damage and strong shaking in the region of Southern California near San Bernardino today. NEIC reported maximum shaking in San Bernardino with intensity up to V. EMSC reported moderate to strong shaking in Southern California was felt in San Bernardino, Colton, Loma Linda, Rialto, Riverside, Fontana, Highland, Redlands, Jurupa Valley, Moreno Valley, Rancho Cucamonga, Mentone, Mira Loma, Ontario, Yucaipa, Norco among others. This continues a series of moderate earthquakes that began with the arrival of the year 2024 and has included most recently an M 4.3 on August 29, 2018 and a similar event of 4.2 on January 5, 2024. At the time this summary noted:

"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." (January 25, 2024)

Today's epicenter in Los Angeles, California is located at 103 degrees from the

Xinjiang, China epicenter of January 22, 2024 and was probably promoted by energy from that source. It occurred near local solar noon at the time of the new moon as noted in previous summaries:

"The new moon will arrive on February 9, 2024 at 22:59 UT. Longitudes which are at local solar midnight at this time are located at about 15 East while those at local solar noon are near 165 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/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 full moon are considered moderate high in the next week (February 4-14, 2024).

Tidal stresses were probably important in the timing of today's California earthquake. Minor damage was reported in Los Angeles. This included some minor damage to structures and the temporary closure of regional theme parks such as

Disneyland rides." (February 10, 2024)

It may also be noted that today's earthquake in Los Angeles coincided with landfall of Hurricane Francine in Louisiana and Tropical Storm Ileana in Baja California just as the event of August 20, 2023 coincided with the landfall of Hurricane Hilary in California. Data for TS Ileana from NHC follows:

TROPICAL STORM ILEANA (09E)

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

TS ILEANA 2024-09-13 00:00 UT 21.2N 108.7W 50 kts Baja, Gulf of California

Tropical Storm Ileana (Depression 09E) formed today in the southern Gulf of California with winds up to 50 kts. It is expected to track to the north and west and may affect regional seismicity as far to the north as southern California as it passes through the area.

It also followed a series of lighter earthquakes in the area which were noted in this summary as possible precursors to such an event as today's as:

"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." (September 3, 2024)

Today's earthquake in Los Angeles coincided with the peak (KP 7) of the strongest geomagnetic storm (AP 67) since the AP index reached 273 on May 11, 2024 and 122 a month ago on August 12, 2024 (AP 122) and may have been additionally promoted at this time by this disturbance.

It is also noteworthy that today's event occurred with the second strongest solar flare of the past week - an M6.8 which began within several minutes of 14:28 UT - the same time as the event in Los Angeles occurred. Both followed an X1.3 flare which occurred when Los Angeles was at local solar midnight several hours earlier. This event in California was likely triggered by Solar Flare Effects and by plate tectonic movements related to the landfall of Hurricane Francine. Flare Date from SWPC for these follows:

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

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

1110 0931 0943 0951 X1.3 (September 12, 2024) 7.6E-02

South Island, NZ, M 4.1 09:45 UT

Michoacan M 5.0 09:48 UT

1260 1429 1443 1447 M6.8 (September 12, 2024) 2.1E-02

Los Angeles M 4.7 14:29 UT

Hurricane Francine was reported as:

"Tropical Storm Francine made landfall today in southern Louisiana with winds up to 90 kts (category 1 Hurricane). It is expected to track to the north and east. Regional seismicitiy in the New Madrid and Mississippi Valley up to Missouri will likely be enhanced by this hurricane in the next several days." (September 12, 2024)

Forecasts 165958 and 116238 had expected today's activity in Los Angeles was likely within about 25 km of today's epicenter around September 9-12, 2024.

O: 12SEP2024 14:28:21 34.0N 118.8W Mw=4.7 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 14:32:05 34.0N 118.8W ML=2.0 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 16:24:04 34.0N 118.8W ML=2.2 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 14:31:24 34.1N 118.8W ML=2.5 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 14:42:49 34.1N 118.8W ML=2.1 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 15:40:49 34.1N 118.8W ML=3.3 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 16:15:32 34.1N 118.8W ML=2.6 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 16:37:32 34.1N 118.8W ML=3.3 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 16:50:37 34.1N 118.8W ML=2.1 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 17:18:07 34.1N 118.8W ML=2.2 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 19:01:01 34.1N 118.8W ML=2.3 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 12SEP2024 14:03:03 33.7N 118.0W ML=2.3 EMSC GREATER LOS ANGELES AREA, CALI

P: 9SEP2024 165958 33.9N 118.3W 2.5-4.7 BAAAA So. California

P: 12SEP2024 116238 34.3N 118.5W 2.5-4.6 AAAAA So. California

The largest earthquake in the world today was an M 5.2 in the Izu Islands, Japan about 500 km south of Tokyo. It was not reported felt in this area. An M 6.1 hit the region within about 100 km of today's event on October 6, 2023. At the time this summary noted:

"Strong seismicity continued today in the region of the Izu Islands today and included the largest event in the world today. NEIC reported this earthquake of M 6.1 in the Izu Islands, Japan was felt with intensity II-III in the area(s) of the Izu Islands, Japan in Kanagawa. This continues the extensive and powerful swarm in the Izu Islands which began several days ago." (October 6, 2023)

Earthquakes in this region of the Izu Islands often occur as swarms often lasting for several weeks and further and perhaps stronger earthquakes in the Izu Islands should be expected in the next two weeks.

Forecast 116225 had expected today's M 5.2 in the Izu Islands was likely around September 13 within about 100 km.

O: 12SEP2024 23:48:14 31.0N 141.3E MB=5.2 EMSC IZU ISLANDS, JAPAN REGION

P: 13SEP2024 116225 31.0N 140.0E 4.0-5.4 AAAAA Off East Coast Honshu

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 13SEP2024 04:59:32 23.9N 121.8E MB=4.6 EMSC TAIWAN

P: 11SEP2024 116192 24.0N 123.0E 4.0-5.6 AAAAA Taiwan

O: 12SEP2024 22:04:17 31.8N 85.4E MB=4.4 EMSC WESTERN XIZANG

P: 21SEP2024 166258 31.0N 84.0E 3.8-5.3 CAAAA Xizang

INDONESIA AND PHILIPPINES

O: 13SEP2024 06:33:49 4.5N 126.5E MB=5.1 EMSC KEPULAUAN TALAUD, INDONESIA

P: 16SEP2024 116123 4.0N 126.0E 4.0-5.6 BAAAA Mindanao, Philippines

O: 12SEP2024 19:23:57 5.5S 147.0E MB=4.6 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 13SEP2024 116134 6.0S 146.0E 4.0-5.4 AAAAA New Ireland

NEIC reported this earthquake of M 4.6 in Papua New Guinea was felt with intensity up to III in the area(s) of Papua New Guinea in Madang and Goroka, Eastern Highlands..

O: 13SEP2024 02:42:19 6.4S 130.4E MB=4.4 EMSC BANDA SEA

P: 15SEP2024 116147 6.0S 130.0E 4.0-5.5 AAAAA West Irian, PNG

O: 12SEP2024 22:06:45 17.8N 119.7E MB=4.7 EMSC PHILIPPINE ISLANDS REGION

P: 11SEP2024 116159 19.0N 121.0E 3.5-5.1 ABAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 12SEP2024 08:34:39 6.5N 74.0W MB=4.8 EMSC NORTHERN COLOMBIA

P: 13SEP2024 116116 7.0N 73.0W 4.0-5.5 AAAAA Colombia

NEIC reported this earthquake of M 4.8 in Columbia was felt with intensity up to IV in the area(s) of Colombia in Antioquia at Envigado and Medellin.

O: 12SEP2024 23:27:20 8.1S 77.9W MB=4.5 EMSC CENTRAL PERU

P: 12SEP2024 116127 8.0S 74.0W 3.5-5.2 AACAA Brazil

O: 12SEP2024 21:07:08 11.6N 86.0W ML=4.0 EMSC NICARAGUA

P: 15SEP2024 116164 12.0N 86.0W 3.5-5.8 BAAAA Nicaragua

O: 13SEP2024 00:11:03 15.6N 94.5W ML=4.4 EMSC OFFSHORE OAXACA, MEXICO

P: 15SEP2024 116150 17.0N 95.0W 3.5-5.2 ABAAA Chiapas, Mexico

P: 17SEP2024 116150 15.0N 95.0W 3.5-5.1 BAAAA Chiapas, Mexico

O: 13SEP2024 01:08:18 18.1N 71.4W ML=3.0 EMSC DOMINICAN REPUBLIC

P: 15SEP2024 116177 20.0N 71.0W 3.0-4.8 ABAAA Bahamas/No. Caribbean

O: 12SEP2024 09:48:16 18.1N 103.3W ML=4.0 EMSC OFFSHORE MICHOACAN, MEXICO

P: 13SEP2024 116162 18.0N 104.0W 3.5-5.4 AAAAA Michoacan, Mexico

O: 12SEP2024 16:15:00 18.4N 102.8W ML=4.1 EMSC MICHOACAN, MEXICO

P: 16SEP2024 116161 19.0N 102.0W 3.5-5.1 BAAAA Michoacan, Mexico

O: 12SEP2024 21:30:50 18.9N 67.3W MD=3.3 EMSC PUERTO RICO REGION

O: 12SEP2024 21:57:56 18.9N 67.4W MD=3.4 EMSC PUERTO RICO REGION

O: 12SEP2024 22:35:27 18.9N 67.3W MD=3.4 EMSC PUERTO RICO REGION

O: 12SEP2024 09:22:23 18.8N 67.4W MD=3.4 EMSC PUERTO RICO REGION

P: 13SEP2024 116170 18.0N 67.0W 3.4-5.3 AAAAA Puerto Rico

O: 12SEP2024 19:41:26 19.2N 68.8W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

P: 15SEP2024 116171 19.0N 69.0W 3.4-4.9 BAAAA Puerto Rico

O: 12SEP2024 23:51:26 22.5S 68.6W MB=4.7 EMSC ANTOFAGASTA, CHILE

P: 13SEP2024 116354 23.0S 67.0W 4.0-5.6 AABAA Argentina

O: 12SEP2024 20:34:50 23.0N 109.8W ML=3.0 EMSC BAJA CALIFORNIA SUR, MEXICO

P: 17SEP2024 116180 24.0N 109.0W 3.5-5.1 BAAAA Gulf of California

O: 13SEP2024 02:03:01 24.1S 67.1W MB=4.5 EMSC SALTA, ARGENTINA

P: 13SEP2024 116354 23.0S 67.0W 4.0-5.6 ABAAA Argentina

AFRICA AND EUROPE

O: 12SEP2024 07:39:53 17.8N 40.1E MB=4.4 EMSC RED SEA

O: 12SEP2024 06:46:13 18.0N 40.0E MB=4.9 EMSC RED SEA

P: 17SEP2024 116174 19.0N 39.0E 3.0-4.9 BAAAA Sudan

NEIC reported this earthquake of M 4.4 in Eritrea, Red Sea was felt with intensity up to IV in the area(s) of Eritrea, Red Sea in Massawa and in Badr al-Madinah, Saudi Arabia.

O: 13SEP2024 06:48:49 40.0N 39.1E MW=4.1 EMSC EASTERN TURKEY

P: 8SEP2024 165973 38.0N 39.0E 3.5-5.1 BBAAA Turkey

O: 13SEP2024 01:47:04 77.8N 7.5E ML=3.7 EMSC SVALBARD REGION

P: 19SEP2024 116335 76.0N 5.0E 3.0-4.5 CBAAA Norway

No significant (M>=5) or unusual earthquakes were reported in Europe today.

SOUTHWEST PACIFIC

O: 12SEP2024 18:00:44 17.9S 178.5W MB=4.5 EMSC FIJI REGION

P: 14SEP2024 116349 18.0S 177.0W 4.0-5.7 AABAA Tonga Islands

O: 12SEP2024 20:28:29 22.5S 174.1E MB=4.6 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 11SEP2024 116367 21.0S 174.0E 4.0-5.6 ABAAA Tonga/Fiji

No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 12SEP2024 18:58:56 34.9S 178.4W MB=4.7 EMSC SOUTH OF KERMADEC ISLANDS

P: 8SEP2024 166104 33.0S 178.0W 4.0-5.6 BBAAA So. Kermadec Islands

O: 12SEP2024 09:45:57 41.2S 172.6E ML=4.1 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 12SEP2024 22:41:36 43.3S 172.9E MS=4.0 GEONET South Island, N.Z.

P: 10SEP2024 166106 41.0S 174.0E 3.0-4.9 AAAAA So. Island, N.Z.

GEONET reported this earthquake was felt with light intensity in the area of Christchurch, New Zealand and in southern North Island. Of 2428 felt reports 1404 reports of weak and 972 of light intensity with 45 of moderate shaking and 2 with strong 0 with severe and 5 with extreme intensity came from the area.

JAPAN AND KURIL ISLANDS

O: 12SEP2024 13:59:32 27.6N 141.8E MB=4.7 EMSC BONIN ISLANDS, JAPAN REGION

P: 17SEP2024 116179 28.0N 142.0E 4.0-5.5 BAAAA Bonin Islands

O: 12SEP2024 23:48:14 31.0N 141.3E MB=5.2 EMSC IZU ISLANDS, JAPAN REGION

P: 13SEP2024 116225 31.0N 140.0E 4.0-5.4 AAAAA Off East Coast Honshu

O: 12SEP2024 11:08:30 38.8N 142.2E ML=4.0 EMSC NEAR EAST COAST OF HONSHU,

P: 11SEP2024 116227 38.0N 141.0E 4.0-5.4 AAAAA Off East Coast Honshu

P: 14SEP2024 116245 38.0N 143.0E 4.0-5.4 AAAAA So. of Honshu

P: 16SEP2024 116227 39.0N 142.0E 4.0-5.6 BAAAA Off East Coast Honshu