Previous two summaries

MODERATELY STRONG QUAKE SHAKES VANCOUVER ISLAND, BRITISH COLUMBIA, CANADA

EARTHQUAKE SUMMARY FOR SEPTEMBER 17, 2023

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 as noted in this and previous issues of this summary:

"The New Moon will arrive at 01:40 UT on September 15. Longitudes which will be at local solar midnight at this time are near 25 West while those at local solar noon are near 155 East. These include the same areas identified as probable area of tidal triggering with the Full Moon of August 31. This forecast identified these at the time as: "These zones include the central Atlantic and Iceland and western Europe in the west and the Kuril Islands, Japan and portions of eastern Indonesia and the Vanuatu Islands in the east. These areas are the most likely to see tidal triggering in the next week. Such events often occur near local solar midnight and noon. A major earthquake is considered likely with this full moon in the next week." (September 13-15, 2023)

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)

An M 6.0 was also recorded in the Vancouver area about 150 km southeast of today's event on April 13, 2023.

Forecast 156546 had expected today's event within about 10 km was likely in mid-September.

O: 17SEP2023 11:28:13 50.8N 130.2W Mw=5.6 EMSC VANCOUVER ISLAND, CANADA REGION

O: 17SEP2023 11:28:08 50.6N 130.5W MB=5.9 ECAN of Port Hardy, BC

O: 17SEP2023 15:19:50 50.8N 130.3W ML=4.3 EMSC VANCOUVER ISLAND, CANADA REGION

O: 17SEP2023 15:19:49 50.7N 130.5W MB=4.3 ECAN of Port Hardy, BC

O: 17SEP2023 09:58:57 50.6N 130.5W MB=5.0 ECAN of Port Hardy, BC

O: 17SEP2023 09:59:03 50.8N 129.8W Mw=4.5 EMSC VANCOUVER ISLAND, CANADA REGIO

P: 13SEP2023 156546 50.5N 130.4W 3.0-4.9 BAAAA British Colombia

An unusually large M 5.1 struck the area of Northern Italy today. NEIC reported it was felt with maximum intensity IV in San Godenzo, Toscana, Brisighella Emilia-Romagna, Castrocaro Terme and Terra del Sole and Forli with lesser shaking in Borgo, San Lornzo, Scarperia, Riolo Terme, Pontassieve and Imola among others. This is the strongest earthquake in northern Italy within about 200 km of this epicenter since an M 5.6 about 200 km to the east on November 9, 2022 but the last within about 100 km of today's epicenter was an 6.1 on May 20, 2012 and an M 5.5 aftershock on May 29, 2012. At the time of the May 20, 2012 event this summary noted:

"Three strong earthquakes of M 5.8-6.1 hit in the world today and were probably triggered by tidal forces associated with the upcoming solar eclipse which will occur later today. The most widely felt and damaging of today's events occurred as an M 6.1 in northern Italy ...

The last earthquake in northern Italy of similar or larger magnitude (and the only such event in the past 22 years) was an M 6.4 on September 26, 1997." (May 20, 2012)

Today's event in Italy occurred near Florence but was reported by the press to have not caused any significant damage in the area. Forecast 156503 had expected today's event within about 100 km was likely around September 15.

O: 18SEP2023 03:10:14 44.0N 11.7E Mw=5.1 ANSS NORTHERN ITALY

O: 18SEP2023 03:10:14 44.0N 11.6E Mw=5.1 EMSC NORTHERN ITALY

P: 15SEP2023 156503 45.0N 12.0E 3.0-5.2 BAAAA Austria

LANDFALL OF HURRICANE LEE IN NOVA SCOTIA ASSOCIATED WITH VANCOUVER EARTHQUAKES

EARTHQUAKE SUMMARY FOR SEPTEMBER 16, 2023

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:

and more recently:

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:

The strongest earthquake in the world today was an M 5.4 in the Mid-Indian Ridge. This is the first earthquake of this size or larger within about 200 km of this epicenter since an M 5.6 on March 27, 2022 and an M 5.5 on November 2, 2021. Today's activity in the mid-Indian Ridge may have been promoted by antipodal energy associated with Hurricane Jova which passed over the antipode of today's event on September 5, 2023 as noted at the time in this summary:

"HURR JOVA 2023-09-06 00:00 UT 13.3N 109.0W 90 kts South of Gulf of Mexico" (September 6, 2023)

Forecast 156319 had expected today's event in this region was likely around

September 10.

O: 16SEP2023 13:47:57 13.7S 66.3E Mw=5.4 EMSC MID-INDIAN RIDGE

P: 10SEP2023 156319 15.0S 67.0E 4.0-5.6 CBAAA So. Indian Ocean

The strongest earthquake in the U.S. or Canada today was an M 3.9 in the Fox Islands, Aleutians, Alaska. It was not reported felt in this remote area. The last event of significantly larger magnitude in the Fox Islands was an M 4.6 near today's epicenter on August 16, 2023. At the time this summary noted:

"The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Fox Islands, Aleutians, Alaska. It was not reported felt in this remote epicentral area. This is the strongest earthquake in the Fox Islands since an M 4.8 on July 1, 2023 and is probably a regional aftershock of that event." (August 16, 2023)

Like the event of August 16, today's Fox Islands earthquake occurred with the new moon near local solar noon and was probably promoted by tidal stresses with that alignment. Forecast 156550 had expected today's event in the Fox Islands was likely within about 50 km around September 17. The Fox Islands are near 103 degrees from the M 6.8 in Morocco of September 8, 2023 and may have been promoted by energy from that source. Other events at this distance today from Morocco included moderate quakes in Sumatra, the West Chile Rise and Honshu, Japan.

O: 16SEP2023 23:59:20 52.4N 169.4W ML=3.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 17SEP2023 156550 51.9N 169.2W 3.5-4.9 AAAAA Fox Islands, Aleutians

O: 16SEP2023 19:14:14 41.2S 89.4W mb=4.8 EMSC SOUTHEAST OF EASTER ISLAND

P: 13SEP2023 156616 43.0S 83.0W 4.0-5.8 BBCAA Chile Rise

O: 17SEP2023 00:44:20 3.3N 97.9E ML=4.3 EMSC NORTHERN SUMATRA, INDONESIA

P: 12SEP2023 156376 3.0N 97.0E 4.0-5.7 BAAAA Nicobar Islands

O: 16SEP2023 18:28:21 44.9N 149.8E mb=4.5 EMSC KURIL ISLANDS

P: 14SEP2023 156535 45.0N 149.0E 3.5-5.5 AAAAA So. Kurils

Today's earthquake and forecast map follows. Stippled White areas are nodal distances (360/n, n an integer) from the earthquake of M 6.9 in the area of Morocco September 8, 2023, where promoted seismicity is considered likely.

Today's projected seismicity map follows for the coming week.

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: 17SEP2023 02:00:26 34.6N 99.0E mb=4.4 EMSC SOUTHERN QINGHAI, CHINA

P: 15SEP2023 156488 36.0N 100.0E 3.5-4.9 ABAAA So. China

O: 17SEP2023 00:04:19 38.9N 71.7E mb=4.3 EMSC TAJIKISTAN

P: 20SEP2023 156452 39.0N 72.0E 3.8-5.2 BAAAA Hindu Kush/Pakistan

O: 16SEP2023 15:56:49 55.6N 160.1E mb=4.4 EMSC KAMCHATKA PENINSULA, RUSSIA

P: 11SEP2023 156548 55.0N 160.0E 4.0-5.6 BAAAA E. of Kamchatka

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

INDONESIA AND PHILIPPINES

O: 16SEP2023 21:17:39 0.5S 133.2E mb=5.0 EMSC NEAR N COAST OF PAPUA, INDONES

P: 17SEP2023 156394 2.0S 139.0E 4.0-5.4 ABCAA West Irian, PNG

O: 17SEP2023 00:44:20 3.3N 97.9E ML=4.3 EMSC NORTHERN SUMATRA, INDONESIA

P: 12SEP2023 156376 3.0N 97.0E 4.0-5.7 BAAAA Nicobar Islands

O: 16SEP2023 10:04:58 3.9N 126.4E mb=4.9 EMSC KEPULAUAN TALAUD, INDONESIA

P: 17SEP2023 156372 5.0N 128.0E 4.0-5.4 ABBAA Halmahera

O: 16SEP2023 08:39:30 6.0S 151.3E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.

P: 12SEP2023 156387 5.0S 152.0E 4.0-5.5 BAAAA New Britain

O: 16SEP2023 21:14:01 7.6S 127.6E mb=4.2 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 14SEP2023 156379 7.0S 127.0E 4.0-5.4 AAAAA Banda Sea

O: 16SEP2023 15:04:56 8.4N 125.9E ML=4.1 EMSC MINDANAO, PHILIPPINES

P: 18SEP2023 156372 8.0N 127.0E 4.0-5.5 AAAAA Halmahera

P: 20SEP2023 156366 9.0N 126.0E 4.0-5.4 BAAAA Central Philippines

O: 17SEP2023 04:12:31 11.4N 125.4E ML=4.0 EMSC SAMAR, PHILIPPINES

P: 16SEP2023 156409 13.0N 124.0E 3.5-4.9 ABBAA Luzon, Philippines

O: 17SEP2023 02:58:12 19.2N 121.2E mb=4.5 EMSC BABUYAN ISL REGION, PHILIPPINE

P: 12SEP2023 156435 20.0N 121.0E 4.0-5.4 BAAAA Taiwan

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

CENTRAL AND SOUTH AMERICA

O: 16SEP2023 13:29:31 6.8N 73.1W mb=4.9 EMSC NORTHERN COLOMBIA

P: 18SEP2023 156367 7.0N 73.0W 4.0-5.4 AAAAA Colombia

NEIC reported this earthquake of M 4.9 in northern Colombia was felt with intensity II-III in the area(s) of northern Colombia in Bucaramanga, Santander.

O: 16SEP2023 09:57:40 14.9N 94.5W ML=4.4 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 17SEP2023 156401 14.0N 94.0W 3.5-5.6 AAAAA Chiapas, Mexico

O: 16SEP2023 23:09:06 17.0N 95.0W ML=4.1 EMSC OAXACA, MEXICO

P: 12SEP2023 156402 17.0N 95.0W 3.5-5.3 BAAAA Chiapas, Mexico

O: 16SEP2023 10:12:41 19.1N 66.6W MD=3.2 EMSC PUERTO RICO REGION

O: 16SEP2023 10:38:04 19.1N 66.5W MD=3.3 EMSC PUERTO RICO REGION

O: 16SEP2023 09:53:40 17.9N 66.9W MD=3.0 EMSC PUERTO RICO REGION

O: 16SEP2023 12:38:28 17.9N 66.9W MD=3.2 EMSC PUERTO RICO REGION

O: 16SEP2023 15:11:14 17.9N 66.9W MD=3.3 EMSC PUERTO RICO REGION

O: 16SEP2023 07:54:40 17.9N 66.9W MD=3.6 EMSC PUERTO RICO REGION

P: 17SEP2023 156419 18.0N 69.0W 3.4-5.1 AABAA Puerto Rico

O: 17SEP2023 05:10:41 18.0N 100.8W ML=4.2 EMSC GUERRERO, MEXICO

P: 17SEP2023 156412 18.0N 101.0W 3.5-5.1 AAAAA Michoacan, Mexico

O: 17SEP2023 06:54:38 19.0N 68.4W MD=3.6 EMSC DOMINICAN REPUBLIC REGION

O: 17SEP2023 01:51:45 18.2N 68.4W MD=3.5 EMSC MONA PASSAGE, DOMINICAN REPUBL

P: 17SEP2023 156419 18.0N 69.0W 3.4-5.1 AAAAA Puerto Rico

O: 16SEP2023 19:08:56 24.3S 67.2W ML=4.0 EMSC SALTA, ARGENTINA

P: 18SEP2023 156591 23.0S 67.0W 4.0-5.8 ABAAA Argentina

O: 16SEP2023 17:29:22 27.7N 111.7W ML=3.7 EMSC GULF OF CALIFORNIA

P: 20SEP2023 156426 28.0N 112.0W 3.5-5.1 BAAAA Gulf of California

O: 17SEP2023 04:01:46 29.4S 71.3W Mw=5.0 EMSC OFFSHORE COQUIMBO, CHILE

O: 17SEP2023 04:01:46 29.5S 71.3W Mw=5.0 GUC OFFSHORE COQUIMBO, CHILE

P: 15SEP2023 156594 29.0S 70.0W 4.0-5.7 AAAAA Coast Central Chile

NEIC reported this earthquake of M 5.0 in Coquimbo, Chile was felt with intensity II-III in the area(s) of Coquimbo, Chile in La Serena (IV), Vicuna and Vallenar, Atacama.

GUC reported it was felt with intensity V in Coquimbo at La Serena, La Higuera; IV in Punta de Choros, Andacollo, Paihuano, Vicuna, Ovalle, Coquimbo, Rio Hurtado; II in Tongoy, Canela, Monte Patria and in Atacama with IV in Copiapo, Tierra Amarilla, Alto del Carmen, Freirina, Huasco and Vallenar, Chile.

O: 17SEP2023 02:18:06 37.8S 75.1W mb=5.0 EMSC OFF COAST OF BIO-BIO, CHILE

P: 14SEP2023 156608 37.0S 74.0W 4.0-5.6 BAAAA Central Chile

AFRICA AND EUROPE

O: 16SEP2023 23:22:34 31.1N 8.5W ML=3.8 EMSC MOROCCO

P: 15SEP2023 156458 31.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

O: 16SEP2023 22:51:29 40.9N 52.0E mb=4.6 EMSC CASPIAN SEA, OFFSHR TURKMENIST

P: 19SEP2023 156511 40.0N 52.0E 4.0-5.4 BAAAA Kazakhstan

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

SOUTHWEST PACIFIC

O: 16SEP2023 20:53:10 13.5S 167.1E mb=4.7 EMSC VANUATU

P: 11SEP2023 156589 12.0S 166.0E 4.0-5.4 BBAAA Vanuatu Islands

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

OCEAN RIDGES

O: 16SEP2023 13:47:57 13.7S 66.3E Mw=5.4 EMSC MID-INDIAN RIDGE

P: 10SEP2023 156319 15.0S 67.0E 4.0-5.6 CBAAA So. Indian Ocean

O: 16SEP2023 19:14:14 41.2S 89.4W mb=4.8 EMSC SOUTHEAST OF EASTER ISLAND

P: 13SEP2023 156616 43.0S 83.0W 4.0-5.8 BBCAA Chile Rise

O: 16SEP2023 17:31:10 57.9S 25.0W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION

P: 14SEP2023 156623 58.0S 25.0W 4.0-5.8 AAAAA So. Sandwich Islands

ZEALANDIA AND AUSTRALIA REGION

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

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 16SEP2023 18:28:21 44.9N 149.8E mb=4.5 EMSC KURIL ISLANDS

P: 14SEP2023 156535 45.0N 149.0E 3.5-5.5 AAAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 16SEP2023 09:40:45 30.9N 114.2W ML=3.8 EMSC GULF OF CALIFORNIA

P: 14SEP2023 156426 30.0N 114.0W 3.5-5.1 AAAAA Gulf of California

O: 16SEP2023 14:36:28 33.4N 116.7W ML=2.0 EMSC SOUTHERN CALIFORNIA

O: 16SEP2023 16:49:57 34.0N 116.7W ML=2.6 EMSC SOUTHERN CALIFORNIA

O: 16SEP2023 16:49:57 34.0N 116.7W ML=2.8 ANSS SOUTHERN CALIFORNIA

O: 16SEP2023 14:28:00 32.9N 116.2W ML=2.1 EMSC SOUTHERN CALIFORNIA

P: 16SEP2023 156478 32.9N 115.6W 2.5-4.8 AAAAA So. California

NEIC reported this earthquake of M 2.8 in Southern California was felt with intensity II-III in the area(s) of Southern California in White Water.

O: 16SEP2023 21:48:50 34.0N 118.3W ML=2.5 EMSC GREATER LOS ANGELES AREA, CALI

P: 14SEP2023 156482 34.3N 118.5W 2.5-4.6 AAAAA So. California

NEIC reported this earthquake of M 2.5 in Los Angeles, California was felt with intensity II-III in the area(s) of Los Angeles, California in Los Angeles, Inglewood, Culver City, among others.

O: 16SEP2023 12:14:33 35.8N 120.4W MD=2.4 EMSC CENTRAL CALIFORNIA

P: 12SEP2023 156444 36.1N 120.1W 2.5-4.5 BAAAA Central California

O: 16SEP2023 07:40:08 37.4N 118.5W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 13SEP2023 156440 37.4N 118.6W 2.5-4.6 BAAAA California/Nevada area

O: 16SEP2023 21:46:16 38.5N 119.5W MD=2.0 EMSC CENTRAL CALIFORNIA

P: 12SEP2023 156443 39.1N 119.6W 2.5-4.4 BAAAA California/Nevada area

O: 16SEP2023 20:36:19 39.4N 121.7W MD=2.9 EMSC NORTHERN CALIFORNIA

O: 16SEP2023 16:59:18 39.4N 122.4W MD=2.8 EMSC NORTHERN CALIFORNIA

P: 16SEP2023 156445 39.7N 123.7W 2.5-4.6 AAAAA Central California

O: 16SEP2023 13:11:14 40.7N 124.6W MD=2.3 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 13SEP2023 156526 40.5N 124.8W 2.5-4.6 BAAAA Off Coast of No. Calif

ALASKA

O: 16SEP2023 23:59:20 52.4N 169.4W ML=3.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 17SEP2023 156550 51.9N 169.2W 3.5-4.9 AAAAA Fox Islands, Aleutians

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

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

ROCKY MOUNTAINS REGION

No earthquakes of M>=2 were located in the Rocky Mountain region today.

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.

STRONG QUAKE SHAKES ATACAMA, CHILE

EARTHQUAKE SUMMARY FOR SEPTEMBER 15, 2023

The strongest earthquake in the world today was an M 5.7-5.9 in the area off the coast of Atacama, Chile. GUC reported this earthquake was felt with intensity III in Atacama at Copiapo, Tierra Amarilla and Caldera, Chile. This earthquake occurred with the new moon within about an hour of local solar noon and was probably promoted by tidal stresses associated with that alignment as described in previous issues of this summary:

A similar M 5.9 hit Atacama with the full moon on April 4, 2023. At the time this summary noted:

"An M 5.9 also shook the region of Central Chile in Atacama today. NEIC reported it was felt with intensity VI in Copiapo with IV in Diego de Almagro and in La Serena, Coquimbo, Chile. This is the largest earthquake in the Atacama region of Chile since an M 6.0 on July 4, 2021. That earthquake was associated with an X1.2 solar flare and a strong activation of western North America. At the time this summary noted:

"A series of moderately large to large earthquake hit along the western coastline of North and South America today. These included an M 5.6-5.7 in Nayarit, Gulf of California; two events of M 5.8-6.0 in Atacama, Chile and a series of light, but widely felt quakes in southern and central California of M 3.4-3.6. Much of this activity may be related to an X1.5 solar flare which occurred when the region of Atacama was sub-solar at 14:30 UT (#6940). This is the strongest solar flare reported since X9 and X8 flares on September 6 and 10, 2017, nearly four years ago. ...

Two strong earthquakes of M 5.9-6.0 struck the Atacama area of Central Chile today. They were felt with maximum intensity IX (local damage) at Vallenar; V in Vicuna and Ovalle, Coquimbo and IV in Coquimbo at Coquimbo, Copiapo, and IV in Valparaiso at Vina del Mar and Quilpue, Chile. ... The last earthquake of M>=6 within about 200 km of today's activity was a series on September 1, 2020 including events of M 6.8, 6.5 and 6.3 and prior to that an M 6.9 on November 11, 2015." (July 4, 2021, April 4, 2023)

O: 15SEP2023 18:07:42 27.3S 71.4W Mw=5.7 EMSC OFFSHORE ATACAMA, CHILE

O: 15SEP2023 18:07:42 27.3S 71.7W Mw=5.9 GUC OFFSHORE ATACAMA, CHILE

P: 13SEP2023 156593 26.0S 71.0W 4.0-5.6 ABAAA Coast Central Chile

P: 13SEP2023 156593 28.0S 67.0W 4.0-5.6 AACAA Argentina

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 15SEP2023 10:34:23 24.0N 121.8E mb=4.9 EMSC TAIWAN

O: 15SEP2023 10:34:31 24.4N 121.8E mb=5.0 EMSC TAIWAN

P: 14SEP2023 156436 24.0N 122.0E 4.0-5.4 AAAAA Taiwan

CWB reported this earthquake was felt with intensity IV in Hualien, Yilan; III in Nantou, Taichung, II in Changhua, Yunlin, Taipei, Chiayi, Miaoli, Taoyuan and Hsinchu and I in Taitung, Taiwan.

NEIC reported this earthquake of M 4.9 in Taiwan was felt with intensity II-III in the area(s) of Taiwan in Taipei and Ilan Counties.

O: 15SEP2023 17:15:06 37.1N 71.7E mb=4.3 EMSC TAJIKISTAN

P: 15SEP2023 156451 36.0N 70.0E 3.8-5.4 ABBAA Hindu Kush/Pakistan

P: 16SEP2023 156451 37.0N 69.0E 3.8-5.2 AABAA Hindu Kush/Pakistan

O: 15SEP2023 15:54:21 56.0N 163.7E mb=4.2 EMSC OFF EAST COAST OF KAMCHATKA

P: 13SEP2023 156552 55.0N 164.0E 4.0-5.9 AAAAA Komandorsky Isl

INDONESIA AND PHILIPPINES

O: 15SEP2023 18:16:01 1.2N 126.4E mb=5.0 EMSC MOLUCCA SEA

P: 17SEP2023 156374 1.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines

O: 15SEP2023 12:43:58 2.8N 127.2E ML=4.0 EMSC MOLUCCA SEA

P: 15SEP2023 156371 3.0N 128.0E 4.0-5.4 AAAAA Halmahera

O: 15SEP2023 19:51:29 5.5S 128.9E mb=4.4 EMSC BANDA SEA

P: 14SEP2023 156379 7.0S 127.0E 4.0-5.4 ABBAA Banda Sea

O: 16SEP2023 01:29:19 5.8S 102.9E mb=4.8 EMSC SOUTHERN SUMATRA, INDONESIA

P: 12SEP2023 156398 6.0S 102.0E 4.0-5.5 BAAAA So. of Sumatera

O: 15SEP2023 19:50:58 9.5S 118.1E ML=4.3 EMSC SUMBAWA REGION, INDONESIA

P: 18SEP2023 156399 8.0S 119.0E 4.0-5.5 BBAAA Sumbawa Island area

CENTRAL AND SOUTH AMERICA

O: 15SEP2023 07:13:52 2.9S 77.5W ML=4.3 EMSC PERU-ECUADOR BORDER REGION

P: 18SEP2023 156383 1.0S 78.0W 4.0-5.5 BBAAA Ecuador

O: 16SEP2023 06:59:04 18.6N 73.6W ML=3.3 EMSC HAITI REGION

P: 15SEP2023 156422 19.0N 73.0W 3.0-4.6 AAAAA Bahamas/No. Caribbean

O: 15SEP2023 09:18:32 17.9N 67.0W MD=3.4 EMSC PUERTO RICO REGION

O: 15SEP2023 15:33:36 17.9N 67.1W MD=3.2 EMSC PUERTO RICO REGION

O: 15SEP2023 10:20:17 19.0N 66.0W MD=3.0 EMSC PUERTO RICO REGION

P: 13SEP2023 156408 18.0N 65.0W 3.0-4.9 AAAAA Leeward Islands

O: 15SEP2023 16:44:52 19.6N 64.7W MD=3.8 EMSC VIRGIN ISLANDS REGION

O: 15SEP2023 08:56:07 19.7N 64.7W MD=3.9 EMSC VIRGIN ISLANDS REGION

O: 15SEP2023 18:00:46 19.5N 64.7W MD=3.9 EMSC VIRGIN ISLANDS REGION

P: 17SEP2023 156408 19.0N 65.0W 3.0-4.9 AAAAA Leeward Islands

O: 15SEP2023 19:30:39 21.3N 106.2W ML=4.1 EMSC ISLAS MARIAS REG., NAYARIT, ME

P: 11SEP2023 156404 19.0N 106.0W 3.5-5.1 BCAAA Coast of Jalisco, Mexico

O: 15SEP2023 22:31:29 21.4S 67.8W ML=4.0 EMSC POTOSI, BOLIVIA

P: 12SEP2023 156591 22.0S 68.0W 4.0-6.1 BAAAA Argentina

O: 15SEP2023 21:40:30 23.5S 66.8W ML=3.0 EMSC JUJUY, ARGENTINA

P: 18SEP2023 156591 23.0S 67.0W 4.0-5.8 BAAAA Argentina

O: 15SEP2023 18:07:42 27.3S 71.4W Mw=5.7 EMSC OFFSHORE ATACAMA, CHILE

O: 15SEP2023 18:07:42 27.3S 71.7W Mw=5.9 GUC OFFSHORE ATACAMA, CHILE

P: 13SEP2023 156593 26.0S 71.0W 4.0-5.6 ABAAA Coast Central Chile

P: 13SEP2023 156593 28.0S 67.0W 4.0-5.6 AACAA Argentina

GUC reported this earthquake was felt with intensity III in Atacama at Copiapo, Tierra Amarilla and Caldera, Chile.

O: 15SEP2023 16:59:50 14.7N 94.6W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 16SEP2023 02:52:41 14.7N 94.6W ML=4.4 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 16SEP2023 02:45:26 14.8N 94.1W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 16SEP2023 03:01:16 14.8N 94.6W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 16SEP2023 06:44:09 14.8N 94.6W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 15SEP2023 17:22:52 15.0N 94.5W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 15SEP2023 22:37:48 15.0N 93.5W ML=4.3 EMSC OFFSHORE CHIAPAS, MEXICO

O: 16SEP2023 04:51:04 15.1N 94.3W ML=4.4 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 15SEP2023 08:50:35 15.9N 94.9W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 15SEP2023 13:03:54 16.6N 94.6W ML=4.0 EMSC OAXACA, MEXICO

O: 15SEP2023 21:44:05 16.7N 94.5W ML=4.2 EMSC OAXACA, MEXICO

P: 14SEP2023 156402 16.0N 94.0W 3.5-5.5 AAAAA Chiapas, Mexico

AFRICA AND EUROPE

O: 15SEP2023 11:44:20 10.7N 49.4E mb=4.5 EMSC NORTHEASTERN SOMALIA

O: 15SEP2023 23:49:53 38.1N 8.7W ML=3.8 EMSC PORTUGAL

O: 15SEP2023 22:57:14 37.0N 23.9E mb=4.1 EMSC SOUTHERN GREECE

P: 17SEP2023 156463 36.0N 22.0E 3.0-4.8 AABAA No. Greece

O: 16SEP2023 06:16:01 45.6N 26.4E ML=3.9 EMSC ROMANIA

P: 16SEP2023 156534 46.0N 27.0E 3.0-5.3 AAAAA Romania/NW Turkey

NEIC reported this earthquake of M 3.8 in Romania was felt with intensity II-III in the area(s) of Romania in Buzau.

O: 16SEP2023 01:48:35 41.2N 48.3E mb=3.9 EMSC AZERBAIJAN

P: 19SEP2023 156511 40.0N 52.0E 4.0-5.4 BBCAA Kazakhstan

O: 15SEP2023 10:04:52 51.4N 16.1E ML=3.1 EMSC POLAND

P: 13SEP2023 156556 52.0N 16.0E 3.0-4.6 AAAAA Poland

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

SOUTHWEST PACIFIC

O: 15SEP2023 17:04:30 15.6S 174.4W mb=4.9 EMSC TONGA

P: 14SEP2023 156582 15.0S 176.0W 4.0-5.5 AABAA Samoa Islands

P: 18SEP2023 156582 15.0S 175.0W 4.0-5.5 BAAAA Samoa Islands

O: 15SEP2023 23:06:57 24.3S 175.6W mb=5.0 EMSC SOUTH OF TONGA

P: 15SEP2023 156601 25.0S 176.0W 4.0-5.5 AAAAA Tonga Islands

P: 19SEP2023 156601 24.0S 175.0W 4.0-5.7 BAAAA Tonga Islands

O: 15SEP2023 14:57:09 25.2S 179.4W mb=4.3 EMSC SOUTH OF FIJI ISLANDS

P: 13SEP2023 156603 25.0S 179.0W 4.0-5.4 AAAAA Tonga Islands

OCEAN RIDGES

O: 15SEP2023 09:30:02 60.4S 25.8W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION

P: 18SEP2023 156624 61.0S 26.0W 4.0-5.4 BAAAA Southern Ocean

ZEALANDIA AND AUSTRALIA REGION

O: 16SEP2023 02:01:49 30.7S 178.3W mb=5.0 EMSC KERMADEC ISLANDS, NEW ZEALAND

O: 15SEP2023 13:02:27 30.1S 177.7W mb=5.1 EMSC KERMADEC ISLANDS, NEW ZEALAND

P: 14SEP2023 156614 31.0S 177.0W 4.0-5.4 AAAAA So. Kermadec Islands

P: 16SEP2023 156610 30.0S 179.0W 4.0-5.6 AAAAA No. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 15SEP2023 07:20:08 28.3N 140.3E mb=4.4 EMSC BONIN ISLANDS, JAPAN REGION

P: 14SEP2023 156423 28.0N 143.0E 4.0-5.5 AABAA Bonin Islands

O: 15SEP2023 19:35:55 37.1N 141.6E mb=4.6 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 15SEP2023 156471 38.0N 141.0E 4.0-5.9 AAAAA Off East Coast Honshu

O: 15SEP2023 07:46:03 50.7N 157.3E mb=4.1 EMSC KURIL ISLANDS

P: 15SEP2023 156551 51.0N 156.0E 4.0-5.7 AAAAA Kamchatka

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 15SEP2023 10:40:44 31.3N 115.6W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

O: 15SEP2023 16:42:57 30.5N 116.2W ML=3.1 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 13SEP2023 156477 30.8N 116.2W 2.5-4.8 AAAAA So. California

O: 15SEP2023 17:12:51 31.9N 116.2W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2023 156477 30.8N 116.2W 2.5-4.8 AAAAA So. California

P: 20SEP2023 156477 32.6N 116.1W 2.5-4.8 BAAAA So. California

O: 15SEP2023 10:58:47 34.4N 119.2W ML=2.0 EMSC SOUTHERN CALIFORNIA

O: 15SEP2023 11:17:00 34.4N 119.2W ML=2.4 EMSC SOUTHERN CALIFORNIA

P: 16SEP2023 156484 34.9N 119.0W 2.5-4.6 AAAAA So. California

NEIC reported this earthquake of M 2.5 in Southern California was felt with intensity II-III in the area(s) of Southern California in Oak View, Santa Paula and Chatsworth.

O: 15SEP2023 13:43:47 38.2N 117.9W ML=2.5 EMSC NEVADA

O: 15SEP2023 22:24:16 38.2N 118.2W ML=3.1 EMSC NEVADA

P: 16SEP2023 156442 38.2N 118.2W 2.5-4.5 AAAAA California/Nevada area

NEIC reported this earthquake of M 3.2 in Nevada was felt with intensity II-III in the area(s) of Nevada in Glenbrook.

O: 15SEP2023 19:13:09 38.3N 122.2W MD=2.2 EMSC NORTHERN CALIFORNIA

O: 15SEP2023 15:35:43 38.4N 122.6W MD=2.4 EMSC NORTHERN CALIFORNIA

P: 13SEP2023 156444 38.0N 122.3W 2.5-4.4 AAAAA Central California

O: 15SEP2023 18:02:26 40.2N 121.2W ML=2.7 EMSC NORTHERN CALIFORNIA

O: 16SEP2023 06:34:16 40.6N 122.7W MD=2.4 EMSC NORTHERN CALIFORNIA

O: 15SEP2023 21:41:15 41.0N 121.5W MD=2.9 EMSC NORTHERN CALIFORNIA

O: 15SEP2023 21:45:20 39.5N 122.6W ML=2.9 EMSC NORTHERN CALIFORNIA

P: 13SEP2023 156525 40.6N 122.4W 2.5-4.5 AAAAA Northern California

NEIC reported this earthquake of M 2.7 in Northern California was felt with intensity II-III in the area(s) of Northern California in Westwood, Susanville.

ALASKA

O: 15SEP2023 09:07:45 56.8N 154.0W ML=3.3 EMSC KODIAK ISLAND REGION, ALASKA

P: 13SEP2023 156541 54.7N 156.9W 3.5-5.0 ACBAA Alaska Peninsula

O: 16SEP2023 04:13:48 69.1N 144.6W ML=3.2 EMSC NORTHERN ALASKA

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 15SEP2023 11:56:13 43.3N 127.9W ML=2.5 EMSC OFF COAST OF OREGON

P: 12SEP2023 156527 43.9N 128.4W 3.0-4.4 BAAAA Off Coast of Oregon

NEIC reported this earthquake of M 2.5 off the coast of Oregon was felt with intensity II-III in the area(s) of Oregon in Salem.

O: 15SEP2023 15:26:35 50.6N 130.5W ML=2.9 EMSC VANCOUVER ISLAND, CANADA REGIO

P: 13SEP2023 156546 50.5N 130.4W 3.0-4.9 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 15SEP2023 12:02:46 32.0N 103.8W ML=2.2 EMSC NEW MEXICO

P: 13SEP2023 156474 31.4N 103.8W 2.0-4.1 AAAAA SW U.S.A

EASTERN U.S./CANADA

O: 15SEP2023 07:42:25 29.1N 97.9W ML=2.2 EMSC SOUTHERN TEXAS

O: 15SEP2023 11:58:32 29.0N 97.9W ML=3.0 EMSC SOUTHERN TEXAS

P: 13SEP2023 156430 28.0N 98.0W 3.0-4.6 AAAAA Northern Mexico

O: 16SEP2023 06:42:19 36.7N 89.5W MD=2.7 EMSC SOUTHEASTERN MISSOURI

P: 14SEP2023 156461 36.0N 89.0W 2.0-4.4 AAAAA New Madrid area

HAWAII

NEIC reported an earthquake of M 3.3 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Naalehu and Mountain View.

MODERATE QUAKES IN NEW BRITAIN, PNG; SOUTHEAST PACIFIC

EARTHQUAKE SUMMARY FOR SEPTEMBER 14, 2023

The strongest earthquake in the world today was an M 5.6 in New Britain, New Guinea. NEIC reported it was felt with maximum intensity V in New Britain at Kimbe and II in Port Moresby, PNG. A similar earthquake of M 5.6 occurred about 100 km west of this epicenter on August 13, 2023, but the last earthquake of larger magnitude in New Britain was an M 6.3 on April 19, 2023 which, like today's event occurred with the new moon. At the time this summary noted:

"The strongest earthquake in the world today was an M 6.3 in the area of New Guinea. This event was reported by NEIC to have been felt with intensity V in New Britain, Papua New Guinea in Kandrian and VI in Kimbe with intensity II-III in Kae, Morobe, Kainantu, Port Moresby and Mount Hagen, Papua New Guinea. This epicenter is located along the path of totality of the solar eclipse today (see discussion below and in "TIDAL" section of this summary. It is likely it was promoted by strong tidal stresses associated with this alignment. The last earthquake at shallow or intermediate focus with M>=6.3 within about 200 km of this epicenter was an M 6.3 on March 5, 2017. An M 6.5 hit at a depth of 600 km on March 1, 2023 outside this 200 km distance. An M 7.0 on October 10, 2018 was about 200 km from today's epicenter." (April 19, 2023)

Forecast 156389 had expected today's event within about 150 km was likely around September 14, 2023.

O: 14SEP2023 23:15:32 6.4S 149.5E mb=5.0 EMSC NEW BRITAIN REGION, P.N.G.

O: 14SEP2023 19:58:45 6.2S 149.6E Mw=5.6 EMSC NEW BRITAIN REGION, P.N.G.

P: 14SEP2023 156389 5.0S 150.0E 4.0-5.5 ABAAA New Ireland

A similar event of M 5.6 in the area southeast of Easter Island followed an M 4.9 earlier in the day. The foreshock occurred near local solar midnight and may have been promoted by the strong tidal stresses today with the new moon. This is probably a regional aftershock of an M 6.1 in the West Chile Rise about 200 km to the east of today's event on September 13. At that time this summary noted:

The strongest earthquake in the world today was an M 6.1 in the West Chile Rise.

It was not reported felt in this remote area. The only earthquake in the past 3 years of larger magnitude than M 6.1 in the West Chile Rise was an M 6.7 on February 3, 2021. At the time this summary noted in this regard:

"This earthquake is the strongest within about 400 km of this epicenter in at least the historical record for the area. Earthquakes in this area of M 6.5 hit on 1934, 1937, 1954, 1975, 1997 and 1999. It occurred within about an hour of local solar midnight, a time when geomagnetic effects are prominent and may have been related to those as well as to tidal stresses which maximize near this hour. Forecast 131093 had expected today's event within about 50 km was likely around February 8 in the Chile Rise area. The antipode of this epicenter is in China north of Nepal at 36N 83E" (February 3, 2021)

Forecast 156347 had expected today's event within about 100 km was likely around September 9, 2023. This epicenter is at 107 degrees from the M 6.8 in Morocco of September 8 and may have been promoted by energy from that source." (September 13, 2023)

These events in the south Pacific are near 103 degrees from the M 6.8 in Morocco of September 8 and may have been promoted by energy from that source.

O: 14SEP2023 07:19:50 36.3S 99.6W mb=4.9 EMSC SOUTHEAST OF EASTER ISLAND

O: 14SEP2023 22:51:27 36.5S 98.1W Mw=5.6 EMSC SOUTHEAST OF EASTER ISLAND

P: 9SEP2023 156347 36.0S 97.0W 4.0-5.9 BAAAA Chile Rise

An unusually strong earthquake of M 4.0 shook the Falls City area of Southern Texas today. NEIC reported it was felt with maximum intensity IV in Hobson, Karnes City and Falls City with II-III shaking in Gillett, Stockdale, Poth, Sutherland Springs, Floresville and Kenedy among others. This event may have been triggered by Solar Flare effects from flare #9230 (SWPC - which maximized within minutes of this earthquake with parameters from SWPC as:

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

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

9230 1840 1845 1850 C2.9 (September 14, 2023) 1.6E-03

The earthquake in Texas occurred within minutes of local solar noon and SFE re most prominent at this hour - reinforcing the suspicion this could have been promoted by flare 9230. Today's event in Texas follows a series of smaller events which began about two years ago with an M 3.5 on October 30, 2022 but is the strongest event in this series to date - the strongest prior to today in this series was an M 3.8 on July 19, 2023. Stronger regional events have been recorded as an M 4.8 on October 20, 2011 and an M 4.3 on April 9, 1993. At the time of the October 30, 2022 this summary noted:

"An earthquake of M 3.5 also shook Southern Texas today. NEIC reported intensity II-III in Texas at Westhoff, Smiley and Cotulla. This is the strongest earthquake within about 100 km of this epicenter since an M 3.5-3.6 on June 16, 2019 but the last event of significantly larger magnitude in this area was an M 4.8 on October 20, 2011." (October 30, 2022)

Forecast 156430 had expected today's event within this area was likely around

September 13, 2023.

O: 14SEP2023 18:50:41 29.1N 97.9W mb=4.0 EMSC SOUTHERN TEXAS

P: 13SEP2023 156430 28.0N 98.0W 3.0-4.6 ABAAA Northern Mexico

An M 4.6 aftershock in Morocco today was widely felt in the area. Like the event in Texas this event may have been triggered by SFE from flare #9160 with parameters from SWPC as:

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

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

9160 0548 0600 0611 C1.5 (September 14, 2023) 6.8E-04

NEIC reported this M 4.6 was felt with intensity IV in Morocco at Oulad Teima, Essaouira, Marrakech and III in Taroudannt, Agadir, Ouarzazate, Ben Guerir, Safi, Tiznit, and El Jadida. A major incidence of earthquake lights has been reported to have occurred in Morocco shortly before the M 6.8 there on September 8. This has been published in reliable sources. Earthquake lights are often observed in association with major earthquake and have been seen and reported for thousands of years. Many theories try to explain them but the exact cause of these phenomena is still unknown. Thanks to Pam, a reader of this summary for a good summary she sent in this regard. Similar summaries are available on the web for readers to peruse. The death toll from this earthquake is near 3000 with more than 5600 injured. Forecast 156458 had expected enhanced seismicity in this region of Morocco was likely around September 11.

O: 14SEP2023 05:53:16 31.0N 8.4W mb=4.6 EMSC MOROCCO

O: 13SEP2023 15:45:07 31.3N 8.2W ML=3.5 EMSC MOROCCO

O: 15SEP2023 04:55:40 31.6N 7.6W mb=3.7 EMSC MOROCCO

P: 11SEP2023 156458 30.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

The largest earthquake in the U.S. or Canada today was an M 4.4 in Southern Alaska. This is the strongest earthquake within about 150 km of this epicenter in Southern Alaska since an M 4.4 on August 6, 2023 and an M 5.0 on July 28, 2023. This earthquake occurred within minutes of local solar noon and was probably promoted by tidal stresses with today's new moon. Forecast 156568 had expected today's event in this area was likely around September 14.

O: 14SEP2023 22:35:04 59.3N 153.5W mb=4.4 EMSC SOUTHERN ALASKA

P: 14SEP2023 156568 60.0N 153.5W 3.2-5.1 AAAAA Central Alaska

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 as noted in this and previous issues of this summary:

Following is an abridged listing of earthquake in this swarm with M>=3.7. A more complete listing can be found under "PACIFIC CANADA" section of this report.

O: 14SEP2023 17:12:22 50.6N 130.5W ML=3.7 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:27:10 50.6N 130.5W ML=3.9 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:41:29 50.6N 130.5W ML=4.2 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:03:37 50.7N 130.4W ML=3.7 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:15:42 50.7N 130.5W ML=4.0 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:31:06 50.7N 130.4W ML=4.2 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:52:26 50.7N 130.5W ML=4.1 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:02:47 50.7N 130.5W ML=4.0 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:02:47 50.7N 130.5W MB=4.0 ECAN of Port Hardy, BC

O: 14SEP2023 17:52:26 50.7N 130.5W MB=4.1 ECAN of Port Hardy, BC

O: 14SEP2023 17:41:29 50.6N 130.5W MB=4.3 ECAN of Port Hardy, BC

O: 14SEP2023 17:31:06 50.7N 130.4W MB=4.2 ECAN of Port Hardy, BC

O: 14SEP2023 17:27:10 50.6N 130.5W MB=3.9 ECAN of Port Hardy, BC

O: 14SEP2023 17:15:42 50.7N 130.5W MB=4.0 ECAN of Port Hardy, BC

O: 14SEP2023 17:12:22 50.6N 130.5W MB=3.7 ECAN of Port Hardy, BC

O: 14SEP2023 17:03:37 50.7N 130.4W MB=3.7 ECAN of Port Hardy, BC

P: 13SEP2023 156546 50.5N 130.4W 3.0-4.9 AAAAA British Colombia

Today's activity in Vancouver is the strongest in the region since M 4.6 and M 6.0 on April 19 and 13, 2023.

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

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

INDONESIA AND PHILIPPINES

O: 14SEP2023 23:15:32 6.4S 149.5E mb=5.0 EMSC NEW BRITAIN REGION, P.N.G.

O: 14SEP2023 19:58:45 6.2S 149.6E Mw=5.6 EMSC NEW BRITAIN REGION, P.N.G.

P: 14SEP2023 156389 5.0S 150.0E 4.0-5.5 ABAAA New Ireland

O: 14SEP2023 13:46:04 7.9N 124.9E mb=4.6 EMSC MINDANAO, PHILIPPINES

P: 11SEP2023 156366 7.0N 124.0E 4.0-5.4 BAAAA Central Philippines

P: 16SEP2023 156366 7.0N 126.0E 4.0-5.4 AAAAA Central Philippines

O: 15SEP2023 04:26:48 15.5N 145.8E mb=4.7 EMSC SAIPAN REG., N. MARIANA ISLAND

P: 16SEP2023 156415 15.0N 147.0E 4.0-5.4 AAAAA No. Marianas

NEIC reported this earthquake of M 4.7 north of Guam was felt with intensity II-III in the area(s) north of Guam in Tinian MP.

CENTRAL AND SOUTH AMERICA

O: 14SEP2023 14:25:07 5.3N 76.7W Mw=5.2 EMSC COLOMBIA

P: 15SEP2023 156367 5.0N 76.0W 4.0-5.6 AAAAA Colombia

NEIC reported this earthquake of M 5.2 in Colombia was felt with intensity II-III in the area(s) of Colombia with IV in Pereira, Risaralda and Chinchina, Caldas and III in Cartago, Santa Rosa de Cabal, Sabaneta, Carmen de Viboral, Guatape and Envigado, Antioquia among others.

O: 14SEP2023 07:01:04 6.8N 73.1W Mw=5.1 EMSC NORTHERN COLOMBIA

P: 18SEP2023 156367 7.0N 73.0W 4.0-5.4 BAAAA Colombia

NEIC reported this earthquake of M 5.1 in Northern Colombia was felt with intensity II-III in the area(s) of Northern Colombia with IV in Sandander at Floridablanca, Duitama and II-III in Piedecuesta, Bucaramanga, Hato, Cajica and in San Cristobal, Venezuela.

O: 15SEP2023 03:41:13 15.0N 93.5W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO

O: 15SEP2023 05:02:44 15.7N 93.8W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO

O: 14SEP2023 14:55:25 15.9N 94.9W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 12SEP2023 156401 16.0N 93.0W 3.5-5.5 BAAAA Chiapas, Mexico

P: 14SEP2023 156402 16.0N 94.0W 3.5-5.5 AAAAA Chiapas, Mexico

O: 14SEP2023 23:48:26 15.4N 96.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 12SEP2023 156417 15.0N 97.0W 3.5-5.4 AAAAA Oaxaca, Mexico

O: 14SEP2023 15:03:00 15.6N 97.3W ML=4.2 EMSC OFFSHORE OAXACA, MEXICO

P: 12SEP2023 156417 15.0N 97.0W 3.5-5.4 AAAAA Oaxaca, Mexico

O: 15SEP2023 04:21:05 17.4S 70.8W ML=4.0 EMSC SOUTHERN PERU

P: 14SEP2023 156584 18.0S 70.0W 4.0-5.9 AAAAA So. Peru/Bolivia

O: 15SEP2023 06:23:03 17.6N 81.6W mb=4.4 EMSC CAYMAN ISLANDS REGION

O: 14SEP2023 20:18:25 17.9N 66.7W MD=3.0 EMSC PUERTO RICO REGION

P: 13SEP2023 156408 18.0N 65.0W 3.0-4.9 AAAAA Leeward Islands

O: 14SEP2023 10:44:53 18.2N 99.1W mb=4.0 EMSC GUERRERO, MEXICO

P: 13SEP2023 156418 18.0N 99.0W 3.5-5.3 AAAAA Oaxaca, Mexico

NEIC reported this earthquake of M 4.0 in Guerrero, Mexico was felt with intensity II-III in the area(s) of Guerrero, Mexico in Chilpancingo and in Mexico City and Tlanepantla.

O: 14SEP2023 09:58:47 19.7N 65.3W MD=3.8 EMSC PUERTO RICO REGION

P: 17SEP2023 156408 19.0N 65.0W 3.0-4.9 BAAAA Leeward Islands

O: 14SEP2023 10:38:15 21.9S 68.5W ML=4.0 EMSC ANTOFAGASTA, CHILE

O: 15SEP2023 03:09:23 20.8S 69.1W mb=4.5 EMSC TARAPACA, CHILE

P: 17SEP2023 156600 20.0S 68.0W 4.0-5.6 AAAAA So. Peru/Bolivia

NEIC reported this earthquake of M 4.5 in Tarapaca, Chile was felt with intensity II-III in the area(s) of Tarapaca, Chile in Iquique.

O: 14SEP2023 21:43:42 25.6N 109.8W ML=4.2 EMSC GULF OF CALIFORNIA

P: 16SEP2023 156425 24.0N 109.0W 3.5-5.2 ABAAA Gulf of California

O: 14SEP2023 14:40:17 27.3S 71.3W ML=4.0 EMSC OFFSHORE ATACAMA, CHILE

P: 13SEP2023 156593 26.0S 71.0W 4.0-5.6 ABAAA Coast Central Chile

P: 15SEP2023 156594 29.0S 70.0W 4.0-5.7 ABAAA Coast Central Chile

O: 14SEP2023 07:32:51 28.0N 112.1W ML=4.2 EMSC GULF OF CALIFORNIA

P: 20SEP2023 156426 28.0N 112.0W 3.5-5.1 CAAAA Gulf of California

AFRICA AND EUROPE

O: 15SEP2023 04:55:40 31.6N 7.6W mb=3.7 EMSC MOROCCO

P: 15SEP2023 156458 31.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

O: 15SEP2023 06:16:11 71.2N 8.0W ML=2.5 EMSC JAN MAYEN ISLAND REGION

P: 14SEP2023 156578 71.0N 7.0W 3.5-5.2 AAAAA Jan Mayen Isl. area

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: 14SEP2023 07:19:50 36.3S 99.6W mb=4.9 EMSC SOUTHEAST OF EASTER ISLAND

O: 14SEP2023 22:51:27 36.5S 98.1W Mw=5.6 EMSC SOUTHEAST OF EASTER ISLAND

P: 9SEP2023 156347 36.0S 97.0W 4.0-5.9 BAAAA Chile Rise

O: 14SEP2023 23:51:27 58.0S 25.3W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION

P: 14SEP2023 156623 58.0S 25.0W 4.0-5.8 AAAAA So. Sandwich Islands

O: 15SEP2023 02:37:46 60.8S 23.7W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION

P: 12SEP2023 156624 61.0S 22.0W 4.0-5.5 BAAAA Southern Ocean

ZEALANDIA AND AUSTRALIA REGION

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

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 14SEP2023 11:51:16 23.2N 124.4E mb=4.5 EMSC SOUTHWESTERN RYUKYU ISL., JAPA

P: 13SEP2023 156431 25.0N 123.0E 4.0-5.4 ABAAA Ryukyu Islands

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 14SEP2023 08:54:47 30.3N 116.1W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

O: 14SEP2023 07:56:35 30.6N 114.5W ML=3.3 EMSC GULF OF CALIFORNIA

P: 14SEP2023 156426 30.0N 114.0W 3.5-5.1 AAAAA Gulf of California

O: 14SEP2023 09:14:28 31.0N 115.8W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

O: 14SEP2023 08:26:17 31.5N 115.6W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO

O: 14SEP2023 21:11:51 31.8N 115.8W ML=3.6 EMSC BAJA CALIFORNIA, MEXICO

O: 14SEP2023 21:32:26 31.8N 115.9W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2023 156477 30.8N 116.2W 2.5-4.8 AAAAA So. California

O: 14SEP2023 18:00:54 33.5N 118.8W ML=2.1 EMSC CHANNEL ISLANDS REG., CALIFORN

P: 14SEP2023 156482 34.3N 118.5W 2.5-4.6 AAAAA So. California

O: 14SEP2023 09:46:43 35.4N 117.2W ML=2.6 EMSC SOUTHERN CALIFORNIA

P: 13SEP2023 156485 35.1N 117.0W 2.5-4.8 AAAAA So. California

O: 14SEP2023 23:48:21 38.2N 117.9W ML=2.3 EMSC NEVADA

P: 16SEP2023 156442 38.2N 118.2W 2.5-4.5 AAAAA California/Nevada area

O: 14SEP2023 10:42:21 39.2N 120.5W MD=1.8 EMSC NORTHERN CALIFORNIA

P: 12SEP2023 156443 39.3N 119.6W 2.5-4.4 AAAAA California/Nevada area

P: 20SEP2023 156446 39.4N 120.5W 2.5-4.4 CAAAA Central California

ALASKA

O: 14SEP2023 22:55:37 51.3N 179.5W ML=3.5 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 15SEP2023 156544 50.9N 179.0W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians

O: 14SEP2023 22:35:04 59.3N 153.5W mb=4.4 EMSC SOUTHERN ALASKA

P: 14SEP2023 156568 60.0N 153.5W 3.2-5.1 AAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 13SEP2023 06:46:44 61.4N 140.0W MB=4.1 ECAN of Burwash Landing, YT

P: 18SEP2023 156566 60.0N 138.0W 3.2-5.3 BBAAA Central Alaska

O: 14SEP2023 17:12:22 50.6N 130.5W ML=3.7 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:27:10 50.6N 130.5W ML=3.9 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:41:29 50.6N 130.5W ML=4.2 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:06:26 50.6N 130.5W ML=3.1 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:00:17 50.7N 130.5W ML=3.3 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:03:37 50.7N 130.4W ML=3.7 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:15:42 50.7N 130.5W ML=4.0 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:31:06 50.7N 130.4W ML=4.2 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:48:11 50.7N 130.4W ML=3.1 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:52:26 50.7N 130.5W ML=4.1 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 17:55:20 50.7N 130.4W ML=3.5 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:02:47 50.7N 130.5W ML=4.0 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:10:22 50.7N 130.4W ML=2.8 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:13:45 50.7N 130.4W ML=3.2 EMSC VANCOUVER ISLAND, CANADA REGION

O: 14SEP2023 18:34:55 50.7N 130.4W MB=3.2 ECAN of Port Hardy, BC

O: 14SEP2023 18:13:45 50.7N 130.4W MB=3.2 ECAN of Port Hardy, BC

O: 14SEP2023 18:06:26 50.6N 130.5W MB=3.1 ECAN of Port Hardy, BC

O: 14SEP2023 18:02:47 50.7N 130.5W MB=4.0 ECAN of Port Hardy, BC

O: 14SEP2023 17:55:20 50.7N 130.4W MB=3.5 ECAN of Port Hardy, BC

O: 14SEP2023 17:52:26 50.7N 130.5W MB=4.1 ECAN of Port Hardy, BC

O: 14SEP2023 17:48:11 50.7N 130.4W MB=3.1 ECAN of Port Hardy, BC

O: 14SEP2023 17:41:29 50.6N 130.5W MB=4.3 ECAN of Port Hardy, BC

O: 14SEP2023 17:31:06 50.7N 130.4W MB=4.2 ECAN of Port Hardy, BC

O: 14SEP2023 17:27:10 50.6N 130.5W MB=3.9 ECAN of Port Hardy, BC

O: 14SEP2023 17:15:42 50.7N 130.5W MB=4.0 ECAN of Port Hardy, BC

O: 14SEP2023 17:12:22 50.6N 130.5W MB=3.7 ECAN of Port Hardy, BC

O: 14SEP2023 17:03:37 50.7N 130.4W MB=3.7 ECAN of Port Hardy, BC

O: 14SEP2023 17:00:17 50.7N 130.5W MB=3.3 ECAN of Port Hardy, BC

O: 13SEP2023 10:01:55 50.7N 130.5W MB=3.0 ECAN of Port Hardy, BC

O: 14SEP2023 18:34:55 50.7N 130.4W ML=3.2 EMSC VANCOUVER ISLAND, CANADA REGIO

P: 13SEP2023 156546 50.5N 130.4W 3.0-4.9 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 14SEP2023 07:02:57 31.8N 104.2W ML=2.1 EMSC WESTERN TEXAS

O: 14SEP2023 12:11:55 31.7N 104.4W ML=2.1 EMSC WESTERN TEXAS

P: 16SEP2023 156474 31.4N 104.2W 2.0-4.1 AAAAA SW U.S.A

O: 14SEP2023 15:25:53 40.8N 111.7W ML=2.5 EMSC UTAH

P: 14SEP2023 156498 39.7N 111.9W 2.0-4.3 ABAAA Utah area

NEIC reported this earthquake of M 2.5 in northern Utah was felt with intensity II-III in the area(s) of northern Utah in Salt Lake City, Park City and Draper.

O: 14SEP2023 15:09:34 44.3N 115.2W ML=2.2 EMSC SOUTHERN IDAHO

P: 13SEP2023 156515 44.4N 114.1W 2.0-4.1 AAAAA Montana/Idaho

P: 17SEP2023 156515 44.4N 115.1W 2.0-4.1 BAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 13SEP2023 19:55:22 47.7N 70.0W MB=1.9 ECAN of La Malbaie, QC

P: 11SEP2023 156513 47.0N 70.0W 2.0-4.2 AAAAA Maine

O: 14SEP2023 18:50:41 29.1N 97.9W mb=4.0 EMSC SOUTHERN TEXAS

P: 13SEP2023 156430 28.0N 98.0W 3.0-4.6 ABAAA Northern Mexico

O: 15SEP2023 02:51:27 36.5N 98.7W ML=2.2 EMSC OKLAHOMA

P: 16SEP2023 156493 38.0N 98.0W 2.0-4.3 ABAAA Southern Plains

HAWAII

O: 15SEP2023 05:07:03 19.2N 155.4W ML=3.4 EMSC ISLAND OF HAWAII, HAWAII

P: 7SEP2023 156131 18.8N 155.2W 3.0-4.6 CAAAA Hawaii

NEIC reported this earthquake of M 3.2 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Naalehu and Mountain View.

STRONG EARTHQUAKE IN WEST CHILE RISE

EARTHQUAKE SUMMARY FOR SEPTEMBER 13, 2023

The strongest earthquake in the world today was an M 6.1 in the West Chile Rise. It was not reported felt in this remote area. The only earthquake in the past 3 years of larger magnitude than M 6.1 in the West Chile Rise was an M 6.7 ion February 3, 2021. At the time this summary noted in this regard:

"This earthquake is the strongest within about 400 km of this epicenter in at least the historical record for the area. Earthquakes in this area of M 6.5 hit on 1934, 1937, 1954, 1975, 1997 and 1999. It occurred within about an hour of local solar midnight, a time when geomagnetic effects are prominent and may have been related to those as well as to tidal stresses which maximize near this hour. … The antipode of this epicenter is in China north of Nepal at

36N 83E" (February 3, 2021)

O: 13SEP2023 11:49:16 36.3S 97.9W Mw=6.1 EMSC WEST CHILE RISE

P: 9SEP2023 156347 36.0S 97.0W 4.0-5.9 BAAAA Chile Rise

A moderate M 5.0 also occurred in Eritrea today. It was not reported felt in this region. This may be an aftershock of an M 5.6 which hit the same region on August 1, 2023. At the time this summary noted:

"The most unusual earthquake of the day today was an M 4.6 in the border region between Eritrea and Ethiopia. This has been an active area especially during periods of active solar and geomagnetic periods, often showing synchronicity with major solar flares. During the current solar quiet period, however the area has see little moderate seismicity. The last earthquakes of M>=4.6 within about 300 km of this epicenter occurred September 11, 2019 and August 13, 2018. The last event of M>5 in this area was an M 5.6 on July 8, 2013." (June 5, 2022)

As expected today’s earthquake occurred at the height of the geomagnetic storm along with several moderate flares and may have been promoted by SFE and other geomagnetic effects. Forecast 156405 had expected enhanced seismicity in mid-September in this region.

O: 13SEP2023 17:51:07 15.2N 39.5E mb=5.0 EMSC ERITREA

P: 16SEP2023 156405 12.0N 40.0E 3.5-5.5 BCAAA Ethiopia

An M 4.6 aftershock shook Morocco today. NEIC reported it was felt with intensity IV in Morocco at Oulad Teima, Essaouira, Marrakech and III in Taroudannt, Agadir, Ouarzazate, Ben Guerir, Safi, Tiznit, and El Jadida.

A major incidence of earthquake lights has been reported to have occurred in

Morocco shortly before the M 6.8 there on September 8. This has been published in reliable sources. Earthquake lights are often observed in association with major earthquake and have been seen and reported for thousands of years. Many theories try to explain them but the exact cause of these phenomena is still unknown. Thanks to Pam, a reader of this summary for a good summary she sent in this regard. Similar summaries are available on the web for readers to peruse. The death toll from this earthquake is near 3000 with more than 5600 injured. Forecast 156458 had expected enhanced seismicity in this region of Morocco was likely around September 11.

O: 14SEP2023 05:53:16 31.0N 8.4W mb=4.6 EMSC MOROCCO

O: 13SEP2023 15:45:07 31.3N 8.2W ML=3.5 EMSC MOROCCO

P: 11SEP2023 156458 30.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

A minor swarm of earthquakes occurred in the region of Mt. St. Helens today. This was centered within minutes of local solar noon and may indicate tidal stresses moving magma. Forecast 156539 had expected enhanced seismicity in this region was likely September 11.

O: 13SEP2023 21:10:40 46.2N 122.2W MD=2.3 EMSC MT. ST. HELENS AREA, WASHINGTON

O: 13SEP2023 19:48:08 46.2N 122.2W MD=2.1 EMSC MT. ST. HELENS AREA, WASHINGTO

P: 11SEP2023 156539 46.9N 122.0W 2.0-4.1 AAAAA Washington state, U.S.

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 13SEP2023 20:11:43 32.4N 48.4E mb=4.2 EMSC WESTERN IRAN

P: 11SEP2023 156489 34.0N 49.0E 3.8-5.4 ABAAA So. Iran

O: 13SEP2023 13:23:14 52.3N 158.5E mb=3.8 EMSC NEAR EAST COAST OF KAMCHATKA

P: 16SEP2023 156551 54.0N 158.0E 4.0-5.8 BBAAA Kamchatka

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

INDONESIA AND PHILIPPINES

O: 13SEP2023 17:09:05 1.9S 120.1E ML=4.3 EMSC SULAWESI, INDONESIA

P: 13SEP2023 156373 2.0N 118.0E 3.5-5.0 ACBAA Malaysia

O: 14SEP2023 06:19:38 10.8S 113.3E ML=4.4 EMSC SOUTH OF JAVA, INDONESIA

P: 12SEP2023 156586 11.0S 116.0E 4.0-5.4 AACAA So. of Indonesia

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

CENTRAL AND SOUTH AMERICA

O: 14SEP2023 03:34:20 10.0N 86.4W mb=4.5 EMSC OFF COAST OF COSTA RICA

P: 11SEP2023 156414 11.0N 86.0W 3.5-5.2 BAAAA Nicaragua

O: 14SEP2023 00:21:35 16.3N 94.7W ML=4.1 EMSC OAXACA, MEXICO

O: 13SEP2023 12:50:10 16.9N 95.5W ML=4.0 EMSC OAXACA, MEXICO

P: 12SEP2023 156402 17.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 14SEP2023 01:48:00 17.9N 66.0W MD=3.1 EMSC PUERTO RICO REGION

O: 13SEP2023 09:00:21 18.8N 65.4W MD=3.4 EMSC PUERTO RICO REGION

O: 13SEP2023 07:45:22 19.4N 65.5W MD=3.4 EMSC PUERTO RICO REGION

P: 13SEP2023 156408 18.0N 65.0W 3.0-4.9 AAAAA Leeward Islands

O: 13SEP2023 07:52:39 23.0S 66.4W mb=4.2 EMSC JUJUY, ARGENTINA

O: 14SEP2023 02:47:27 23.9S 66.8W mb=4.4 EMSC JUJUY, ARGENTINA

P: 18SEP2023 156591 23.0S 67.0W 4.0-5.8 BAAAA Argentina

O: 14SEP2023 00:50:16 27.2S 71.2W Mw=4.5 EMSC OFFSHORE ATACAMA, CHILE

P: 13SEP2023 156593 26.0S 71.0W 4.0-5.6 ABAAA Coast Central Chile

AFRICA AND EUROPE

O: 14SEP2023 05:38:21 28.0S 26.7E ML=3.1 EMSC SOUTH AFRICA

O: 14SEP2023 05:53:16 31.0N 8.4W mb=4.6 EMSC MOROCCO

O: 13SEP2023 15:45:07 31.3N 8.2W ML=3.5 EMSC MOROCCO

P: 11SEP2023 156458 30.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

P: 15SEP2023 156458 31.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

O: 13SEP2023 17:51:07 15.2N 39.5E mb=5.0 EMSC ERITREA

P: 16SEP2023 156405 12.0N 40.0E 3.5-5.5 BCAAA Ethiopia

O: 13SEP2023 20:40:51 36.6N 40.5E ML=4.5 EMSC SYRIA

P: 9SEP2023 156226 38.0N 39.0E 3.5-5.0 BBAAA Turkey

O: 13SEP2023 08:38:18 43.9N 13.4E mb=4.1 EMSC CENTRAL ITALY

P: 11SEP2023 156510 43.0N 13.0E 3.0-5.3 AAAAA Italy

NEIC reported this earthquake of M 4.1 in Central Italy was felt with intensity II-III in the area(s) of Central Italy in Senigallia, Marken and Spinea, Veneto.

O: 13SEP2023 16:09:08 51.6N 16.1E ML=3.4 EMSC POLAND

P: 13SEP2023 156556 52.0N 16.0E 3.0-4.6 AAAAA Poland

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

SOUTHWEST PACIFIC

O: 13SEP2023 11:36:55 9.6S 159.9E Mw=5.2 EMSC SOLOMON ISLANDS

P: 4SEP2023 156326 11.0S 161.0E 4.0-5.5 CBAAA Vanuatu Islands

NEIC reported this earthquake of M 5.2 in Solomon Islands was felt with intensity II-III in the area(s) of Solomon Islands in Honiara, Guadalcanal.

O: 14SEP2023 00:31:18 21.4S 178.5W mb=4.5 EMSC FIJI REGION

P: 13SEP2023 156601 20.0S 175.0W 4.0-5.4 ABCAA Tonga Islands

O: 13SEP2023 16:45:04 23.0S 170.0E mb=5.2 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 14SEP2023 156596 21.0S 169.0E 4.0-5.4 ABAAA Loyalty Islands

OCEAN RIDGES

O: 13SEP2023 11:49:16 36.3S 97.9W Mw=6.1 EMSC WEST CHILE RISE

P: 9SEP2023 156347 36.0S 97.0W 4.0-5.9 BAAAA Chile Rise

ZEALANDIA AND AUSTRALIA REGION

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

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 13SEP2023 09:16:05 48.9N 156.2E mb=4.7 EMSC EAST OF KURIL ISLANDS

P: 11SEP2023 156519 49.0N 156.0E 3.5-5.7 AAAAA NE Pacific

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 13SEP2023 07:26:13 31.2N 115.9W ML=3.1 EMSC BAJA CALIFORNIA, MEXICO

O: 13SEP2023 22:35:15 30.8N 115.7W ML=3.1 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2023 156477 30.8N 116.2W 2.5-4.8 AAAAA So. California

O: 13SEP2023 19:45:54 36.0N 120.5W MD=2.0 EMSC CENTRAL CALIFORNIA

P: 12SEP2023 156444 36.1N 120.1W 2.5-4.5 AAAAA Central California

O: 13SEP2023 12:33:31 40.1N 123.8W MD=2.3 EMSC NORTHERN CALIFORNIA

P: 16SEP2023 156445 39.7N 123.7W 2.5-4.6 BAAAA Central California

NEIC reported an earthquake of M 3.4 in Central California was felt with intensity II-III in the area(s) of Central California in Gonzales, Paicines, Soledad, Hollister, Salinas, Marina, Monterey, Pacific Grove and Santa Cruz.

ALASKA

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

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 13SEP2023 21:10:40 46.2N 122.2W MD=2.3 EMSC MT. ST. HELENS AREA, WASHINGTON

O: 13SEP2023 19:48:08 46.2N 122.2W MD=2.1 EMSC MT. ST. HELENS AREA, WASHINGTO

P: 11SEP2023 156539 46.9N 122.0W 2.0-4.1 AAAAA Washington state, U.S.

ROCKY MOUNTAINS REGION

O: 13SEP2023 11:26:52 31.6N 104.6W ML=2.3 EMSC WESTERN TEXAS

P: 13SEP2023 156474 31.4N 103.8W 2.0-4.1 AAAAA SW U.S.A

EASTERN U.S./CANADA

O: 13SEP2023 14:34:11 34.9N 96.0W ML=2.4 EMSC OKLAHOMA

P: 11SEP2023 156492 35.0N 97.0W 2.0-4.2 AAAAA Southern Plains

HAWAII

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

STRONG EARTHQUAKES SHAKES NORTHERN PHILIPPINES; TAIWAN

EARTHQUAKE SUMMARY FOR SEPTEMBER 12, 2023

The largest earthquake in the world today occurred in the Northern Philippines in the Luzon Strait between the Babyuan Region of the Philippines and Taiwan. NEIC reported it was felt with maximum intensity V in the Cagayan Valley at Aparii, Batal, amd om Cprdo;;era at Sagada, Baguio with lesser shaking of II in Tuguegarao, Cagayan Valley and in Taiwan in Kaohsiung and Taiwan. Strong seismic enhancement had been expected in this region at this time after Supertyphoon Saola passed directly over this epicenter with winds up to 170 kts in late August and early September, 2023 as noted in earlier issues of this summary:

"Super-Typhoon SAOLA (09W ) continued today in the area of southern Taiwan and northern Philippines with winds up to 165 kts. It is expected to reverse course and head towards southern Taiwan making landfall there around September 1. Enhanced seismicity in the northern Philippines and Taiwan is likely as Saola passes through the area." (September 1, 2023).

It is likely today's earthquake was promoted by stresses associated with Super-Typhoon Saola. It occurred near the height of today's geomagnetic storm when AP at 35 was near minor storm levels. It is likely this also had an effect on the occurrence of this event at this time.

PHIVOLCS reported it with M 6.3 while CWB in Taiwan reported it with M 6.7

CWB reported it was felt in Taiwan with intensity II in Kaohsiung, Changhua, Taitung, Yunlin, Tainan and I in Hualien, Nantou, Chiayi, and Penghu Counties, Taiwan. PHIVOLCS reported it was felt throughout northern Luzon, Philippines with maximum intensity VI in Calayan, Cagayan and V in Luna and Pudtol, Apayao; Bacarra, Bangui, Burgos, Demalneg, City of Laoag,Pagudpud, Paoay, Pasuquin, San Nicolas and Vintar, Ilocos Norte; Aparri, Baggao, Camalaniugan, Claveria, Lal-Lo, Pamplong, Sanchez-Mira, Santa Ana, Santa Praxedes and Santa Teresita, Cagayan, Philippines. A foreshock of M 5.0 hit this region yesterday. An earthquake of M 6.0 hit the Babuyan Islands on June 30, 2022, the last event of M>=6.3 in the area reported by NEIC occurred on May 18m 1993 with M 6.8. An M 7.0 hit south of this on July 27, 2022 with an aftershock of M 6.4 on October 25, 2022. The only other similar event in the region in the past 35 years was an M 6.4 on July 16, 2000. At the time of the M 7.0 in July, 2022, this summary noted:

"Today's event of M 7.0 is the strongest within about 300 km of this epicenter since an M 7.3 about 250 km southwest of this on December 11, 1999 and prior to that an M 7.7 about 200 km to the south on July 16, 1990." (July 27, 2022)

Forecasts 156136 and 156410 had expected today's event was likely around September 10-11 within about 25 km of today's epicenters. Today’s epicenter in the Babuyan Islands is near 103 degrees from the M 6.8 in Morocco of September 8 and may have been promoted by energy from that source.

O: 11SEP2023 17:30:12 19.2N 121.1E mb=5.0 EMSC BABUYAN ISL REGION, PHILIPPINE

P: 10SEP2023 156136 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

P: 11SEP2023 156410 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

O: 12SEP2023 11:03:18 19.3N 121.3E Mw=6.3 EMSC BABUYAN ISL REGION, PHILIPPINE

O: 12SEP2023 11:03:18 19.3N 121.3E Mw=6.7 BMGC BABUYAN ISL REGION, PHILIPPINE

O: 12SEP2023 11:03:17 19.3N 121.2E Mw=6.7 CWB BABUYAN ISL REGION, PHILIPPINE

P: 10SEP2023 156136 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

P: 11SEP2023 156410 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

The strongest earthquake in the U.S. or Canada today was an M 5.0 in the central Andreanof Islands, Aleutians, Alaska. NEIC reported it was felt with intensity III in Adak, Alaska. This earthquake occurred within minutes of local solar noon and was probably promoted by strong tidal stresses which maximize near this hour. The last earthquake with M>=5.0 in the Andreanof Islands was an M 5.2 on February 15, 2023. At the time this summary noted:

"The strongest earthquake in the U.S. or Canada today was an M 5.2 in the western Andreanof Islands. This is the strongest earthquake in the western Andreanof Islands, Aleutians, Alaska since an M 5.2 on June 6, 2022. The last event in the area of larger magnitude was an M 6.1 on September 24, 2021." (February 15, 2023)

Forecast 156543 had expected today's event in the Andreanof Islands within about 50 km of this epicenter was likely around September 12.

O: 12SEP2023 23:17:37 51.5N 176.4W mb=5.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 12SEP2023 156543 51.1N 175.8W 3.5-4.9 AAAAA Andreanoff Isls, Aleutians

An M 4.9 also occurred in the Unimak Islands, Alaska today. This event occurred about an hour before that in the Andreanof Islands and, like that event, occurred near local solar noon, probably being promoted by strong tidal stresses. An earthquake of M 5.0 hit the Unimak Island region on August 14, 2023 and was described in this summary at the time as:

The strongest earthquake in the U.S. or Canada today was an M 5.0 in Unimak Island, Aleutians, Alaska. NEIC reported and aftershock of M 4.2 in Unimak Island, Alaska was felt with intensity II-III in the area(s) of Unimak Island, Alaska in Akutan. This activity occurred within minutes of local solar noon and was probably promoted by high tidal stresses with the upcoming new moon. This is the strongest earthquake in the Unimak area since an M 5.1 on September 9 and January 11, 2021. No events of significantly larger magnitude have hit this area in the past 3.5 years." (August 14, 2023)

Forecast 156549 had expected today's event within about 100 km was likely in the Unimak Island area around September 15.

O: 12SEP2023 21:48:57 54.0N 164.1W mb=4.9 EMSC UNIMAK ISLAND REGION, ALASKA

P: 15SEP2023 156549 53.5N 165.8W 3.5-5.0 BAAAA Fox Islands, Aleutians

An unusually large M 3.3 hit the region of Morgan Hill, Central California today. NEIC reported this earthquake of M 3.3 in Central California was felt with intensity II-III in the area(s) of Central California in Morgan Hill, San Martin, San Jose, Gilroy. This event occurred within minutes of local solar midnight and may have been promoted by strong tidal stresses which maximize near this hour. The last earthquake of M>=3.3 within the region of Morgan Hill with M>=3.3 occurred on August 31, 2023 with M 3.3. At the time this summary reported:

"An unusually large M 3.6 earthquake was widely felt in the Morgan Hill area of Central California today. NEIC reported intensity II-III in San Jose, Morgan Hill, Coyote, Mount Hamilton, among others. This is the largest earthquake in this region of California within about 50 km since an M 3.6 on January 23, 2023. The last earthquake of greater magnitude in this area was an M 5.1 on December 5, 2022" (July 30, 2023)

Forecast 156174 had expected today's event was likely within this area around

September 9.

O: 12SEP2023 08:32:21 37.2N 121.6W ML=3.3 EMSC NORTHERN CALIFORNIA

P: 9SEP2023 156174 37.7N 121.9W 2.5-4.4 BAAAA Central California

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 13SEP2023 03:24:36 55.4N 166.2E mb=4.3 EMSC KOMANDORSKIYE OSTROVA REGION

P: 13SEP2023 156552 55.0N 164.0E 4.0-5.9 AABAA Komandorsky Isl

INDONESIA AND PHILIPPINES

O: 13SEP2023 05:34:33 5.8S 110.1E Mw=5.1 EMSC JAVA SEA

P: 14SEP2023 156397 8.0S 108.0E 4.0-5.4 ACBAA So. of Java

O: 12SEP2023 15:01:15 7.8S 120.5E mb=4.6 EMSC FLORES SEA

P: 14SEP2023 156384 8.0S 123.0E 4.0-5.4 AACAA Flores Island area

P: 18SEP2023 156399 8.0S 119.0E 4.0-5.5 CABAA Sumbawa Island area

O: 12SEP2023 11:03:18 19.3N 121.3E Mw=6.3 EMSC BABUYAN ISL REGION, PHILIPPINE

O: 12SEP2023 11:03:18 19.3N 121.3E Mw=6.7 BMGC BABUYAN ISL REGION, PHILIPPINE

P: 10SEP2023 156136 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

P: 11SEP2023 156410 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 13SEP2023 05:02:32 14.4S 71.5W ML=4.0 EMSC CENTRAL PERU

P: 15SEP2023 156580 14.0S 71.0W 4.0-5.6 AAAAA Central Peru

O: 12SEP2023 14:25:34 14.9N 93.2W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 12SEP2023 156401 16.0N 93.0W 3.5-5.5 ABAAA Chiapas, Mexico

P: 17SEP2023 156401 14.0N 94.0W 3.5-5.6 BAAAA Chiapas, Mexico

O: 12SEP2023 20:02:26 17.1N 99.5W ML=4.0 EMSC GUERRERO, MEXICO

O: 13SEP2023 02:24:35 16.5N 98.5W ML=4.4 EMSC GUERRERO, MEXICO

P: 8SEP2023 156145 17.0N 98.0W 3.5-5.4 BAAAA Oaxaca, Mexico

P: 13SEP2023 156418 18.0N 99.0W 3.5-5.3 ABAAA Oaxaca, Mexico

O: 13SEP2023 03:40:36 17.6N 94.8W ML=4.1 EMSC VERACRUZ, MEXICO

P: 12SEP2023 156402 17.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 13SEP2023 00:53:56 18.3N 105.5W mb=4.6 EMSC OFF COAST OF JALISCO, MEXICO

P: 15SEP2023 156404 18.0N 105.0W 3.5-5.1 AAAAA Coast of Jalisco, Mexico

NEIC reported this earthquake of M 4.6 off Jalisco, Mexico was felt with intensity II-III in the area(s) of Jalisco, Mexico in Colima (V) and Teoloyucan, Mexico.

O: 12SEP2023 08:28:54 19.9N 72.8W ML=3.4 EMSC HAITI REGION

P: 15SEP2023 156422 19.0N 73.0W 3.0-4.6 BAAAA Bahamas/No. Caribbean

O: 12SEP2023 14:46:50 20.9N 105.7W ML=4.0 EMSC OFFSHORE NAYARIT, MEXICO

P: 11SEP2023 156404 19.0N 106.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

O: 12SEP2023 12:19:02 21.6S 68.6W ML=4.0 EMSC ANTOFAGASTA, CHILE

P: 12SEP2023 156591 22.0S 68.0W 4.0-6.1 AAAAA Argentina

O: 12SEP2023 09:35:24 23.3N 109.6W ML=3.4 EMSC BAJA CALIFORNIA SUR, MEXICO

P: 16SEP2023 156425 24.0N 109.0W 3.5-5.2 BAAAA Gulf of California

O: 12SEP2023 18:38:57 24.1S 66.8W mb=4.1 EMSC SALTA, ARGENTINA

P: 18SEP2023 156591 23.0S 67.0W 4.0-5.8 CBAAA Argentina

O: 12SEP2023 17:22:32 25.6N 110.0W ML=4.0 EMSC GULF OF CALIFORNIA

P: 16SEP2023 156425 24.0N 109.0W 3.5-5.2 BBAAA Gulf of California

AFRICA AND EUROPE

O: 13SEP2023 00:05:37 70.6N 14.5W mb=4.6 EMSC JAN MAYEN ISLAND REGION

O: 13SEP2023 02:33:11 70.6N 14.6W mb=4.7 EMSC JAN MAYEN ISLAND REGION

O: 13SEP2023 00:06:29 70.4N 14.7W mb=4.9 EMSC JAN MAYEN ISLAND REGION

P: 9SEP2023 156311 71.0N 13.0W 3.5-4.9 BAAAA Jan Mayen Isl. area

O: 12SEP2023 09:39:50 30.8N 8.1W ML=4.0 EMSC MOROCCO

P: 11SEP2023 156458 30.0N 8.0W 3.5-5.3 AAAAA Morocco/Spain

SOUTHWEST PACIFIC

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: 12SEP2023 18:55:50 36.4S 178.5E ML=4.5 EMSC OFF E. COAST OF N. ISLAND, N.Z

O: 12SEP2023 18:55:51 36.4S 178.4E MS=4.7 GEONET North Island, New Zealand

P: 16SEP2023 156611 37.0S 178.0E 3.0-4.4 BAAAA North Island, N.Z.

GEONET reported 7 people felt this earthquake with 7 at weak intensity and 0 with light shaking and 0 with moderate intensity 0 with strong, 0 with severe and 0 with extreme intensity.

JAPAN AND KURIL ISLANDS

O: 12SEP2023 08:57:27 28.1N 130.3E mb=4.9 EMSC RYUKYU ISLANDS, JAPAN

P: 14SEP2023 156427 27.0N 130.0E 4.0-5.5 ABAAA Kyushu Japan

P: 14SEP2023 156432 29.0N 129.0E 4.0-5.4 AAAAA Ryukyu Islands

O: 12SEP2023 13:58:01 30.2N 142.2E mb=4.8 EMSC IZU ISLANDS, JAPAN REGION

P: 14SEP2023 156423 28.0N 143.0E 4.0-5.5 ACAAA Bonin Islands

O: 12SEP2023 10:43:55 31.8N 140.7E mb=4.5 EMSC IZU ISLANDS, JAPAN REGION

P: 18SEP2023 156469 32.0N 141.0E 4.0-5.4 CAAAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 12SEP2023 18:11:38 31.4N 115.4W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

O: 12SEP2023 20:47:49 30.9N 115.3W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2023 156477 30.8N 116.2W 2.5-4.8 AAAAA So. California

O: 12SEP2023 10:48:59 32.6N 117.1W ML=2.0 EMSC SAN DIEGO CTY URBAN AREA, CALI

P: 15SEP2023 156479 33.0N 117.7W 2.5-4.4 AAAAA So. California

P: 18SEP2023 156476 32.0N 117.4W 2.5-4.6 CAAAA So. California

O: 13SEP2023 05:24:01 33.3N 116.3W ML=2.1 EMSC SOUTHERN CALIFORNIA

P: 11SEP2023 156480 33.7N 116.1W 2.5-4.8 AAAAA So. California

O: 12SEP2023 16:46:03 35.8N 117.6W ML=2.1 EMSC SOUTHERN CALIFORNIA

P: 11SEP2023 156487 35.9N 117.7W 2.5-4.7 AAAAA So. California

O: 12SEP2023 08:32:21 37.2N 121.6W ML=3.3 EMSC NORTHERN CALIFORNIA

P: 7SEP2023 156172 37.3N 119.4W 2.5-4.4 BAAAA California/Nevada area

P: 9SEP2023 156174 37.7N 121.9W 2.5-4.4 BAAAA Central California

O: 13SEP2023 00:12:30 37.4N 118.5W MD=2.4 EMSC CENTRAL CALIFORNIA

P: 13SEP2023 156440 37.4N 118.6W 2.5-4.6 AAAAA California/Nevada area

O: 13SEP2023 01:15:27 39.5N 119.6W ML=2.1 EMSC NEVADA

P: 12SEP2023 156443 39.3N 119.6W 2.5-4.4 AAAAA California/Nevada area

O: 12SEP2023 07:01:48 40.2N 117.8W ML=2.6 EMSC NEVADA

O: 12SEP2023 08:10:59 39.6N 118.1W ML=2.1 EMSC NEVADA

P: 7SEP2023 156172 39.9N 118.4W 2.5-4.5 BAAAA California/Nevada area

O: 13SEP2023 05:12:39 40.9N 121.6W MD=2.2 EMSC NORTHERN CALIFORNIA

P: 14SEP2023 156525 40.9N 122.0W 2.5-4.4 AAAAA Northern California

ALASKA

O: 12SEP2023 23:17:37 51.5N 176.4W mb=5.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 12SEP2023 156543 51.1N 175.8W 3.5-4.9 AAAAA Andreanoff Isls, Aleutians

O: 12SEP2023 21:48:57 54.0N 164.1W mb=4.9 EMSC UNIMAK ISLAND REGION, ALASKA

P: 15SEP2023 156549 53.5N 165.8W 3.5-5.0 BAAAA Fox Islands, Aleutians

O: 12SEP2023 10:23:20 55.0N 156.4W ML=3.2 EMSC SOUTH OF ALASKA

P: 13SEP2023 156541 54.7N 156.9W 3.5-5.0 AAAAA Alaska Peninsula

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 12SEP2023 17:25:18 47.6N 117.7W ML=2.7 EMSC WASHINGTON

P: 19SEP2023 156517 47.7N 117.4W 2.0-3.9 CAAAA Montana/Idaho

NEIC reported this earthquake of M 2.7 in Washington State was felt with intensity II-III in the area(s) of Washington State in Fairchild AFB, Medical Lake, Airway Heights, Spokane, Nine Mile Falls.

O: 13SEP2023 06:46:43 61.4N 140.0W mb=4.1 EMSC SOUTHERN YUKON TERRITORY, CANA

P: 6SEP2023 156298 61.3N 140.1W 3.2-4.9 CAAAA Central Alaska

ROCKY MOUNTAINS REGION

O: 12SEP2023 09:26:37 31.5N 104.2W ML=2.4 EMSC WESTERN TEXAS

O: 13SEP2023 05:18:30 31.6N 104.4W ML=2.7 EMSC WESTERN TEXAS

O: 12SEP2023 17:19:15 31.7N 104.4W ML=2.8 EMSC WESTERN TEXAS

P: 13SEP2023 156474 31.4N 103.8W 2.0-4.1 AAAAA SW U.S.A

O: 12SEP2023 15:34:09 32.7N 100.7W ML=2.8 EMSC WESTERN TEXAS

P: 17SEP2023 156475 31.4N 102.2W 2.0-4.1 BBBAA SW U.S.A

O: 12SEP2023 22:01:06 34.2N 107.0W ML=2.8 EMSC NEW MEXICO

P: 12SEP2023 156473 34.7N 109.0W 2.0-4.3 AABAA SW U.S.A

NEIC reported this earthquake of M 2.8 in New Mexico was felt with intensity II-III in the area(s) of New Mexico with IV in Lemitar and Socorro.

O: 12SEP2023 17:19:14 48.3N 116.7W MD=2.2 EMSC NORTHERN IDAHO

P: 19SEP2023 156517 47.7N 117.4W 2.0-3.9 CAAAA Montana/Idaho

EASTERN U.S./CANADA

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

HAWAII

O: 12SEP2023 11:02:16 19.2N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

P: 7SEP2023 156131 18.8N 155.2W 3.0-4.6 BAAAA Hawaii

NEIC reported this earthquake of M 3.1 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Naalehu.

STRONG QUAKES CONTINUE IN INDONESIA

EARTHQUAKE SUMMARY FOR SEPTEMBER 11, 2023

The strongest earthquake in the world today was an M 6.0-6.1 in Halmahera, Indonesia. NEIC reported it was felt in Sulawesi, Indonesia with III in Manado, Tomohon and Mobagu, Sulawesi and possibly in Southern Mindanao, Philippines. BMG reported it was was felt with intensity III-IV in Manado, Sangihe, Kotamobagu, Bitung, Talaud, Jaillil; III in Ternate, Halmahera, Sula, II-III in Gorontalo, Minahas, Ternate, Taliabu, Ambon, and II in Namlea, Tomohon, and Bone Bolango, Indonesia. The last earthquake in Halmahera of M>=6.0 occurred about 200 km northeast of today's epicenter in Halmahera as an M 5.3 on February 23, 2023. At the time this summary noted in this regard:

"This epicenter is about 150 km northeast of the M 7.0 in the Molucca Sea of January 18, 2023 and the strongest within about 150 km in the area since an M 6.4 on June 4, 2020. The only event within this region of M>=6.8 in the past 35 years was an M 6.8 on April 19, 1993." (February 23, 2023)

Forecast 156100 had expected today's event was likely within about 150 km was likely around September 10, 2023.

O: 11SEP2023 12:51:33 1.1N 127.5E Mw=6.0 EMSC HALMAHERA, INDONESIA

O: 11SEP2023 09:33:37 1.3N 126.2E ML=4.1 EMSC MOLUCCA SEA

P: 10SEP2023 156100 2.0N 126.0E 4.0-5.4 AABAA Mindanao, Philippines

An earthquake of M 5.9 also occurred today in the Central Mid-Atlantic Ridge area. It was not reported felt in this remote area. This is near the antipode of the M 6.0 in Indonesia today and may have been promoted by energy associated with that event. The last earthquake of M>=5.9 within about 200 km of this epicenter was an M 6.9 on September 18, 2020. At the time this summary noted in this regard:

"Strong earthquakes in the mid-Atlantic in the past month have included an M 6.5 about 300 km west of today's event on August 30 and an M 6.6 more than 1000 km to the northwest on September 6, 2020. The last earthquake within about 250 km of today's event in the central mid-Atlantic with M>=6.7 occurred more than 30 years ago, this being the strongest quake in the area since an M 6.7 on October 7, 1975 - the largest historical event recorded in this region and the only other such event of M>=6.7." (September 18, 2020)

Forecast 156092 had expected enhanced seismicity in this area was likely around September 8, 2023.

O: 11SEP2023 09:20:57 0.8N 26.1W Mw=5.9 EMSC CENTRAL MID-ATLANTIC RIDGE

P: 8SEP2023 156092 1.0N 28.0W 4.0-5.4 BABAA Central Mid-Atlantic Ridg

The strongest earthquake in the U.S. or Canada today was an M 4.7 in the area

South of Alaska near the Alaska Peninsula. It was not reported felt in this remote area. This is the strongest earthquake within about 200 km of this epicenter since an M 4.8 on April 24, 2023 and an M 5.0 on January 10, 2023, the only such events in the region since September 2022. Forecast 156541 had expected today's event was likely around September 13 within about 50 km of this epicenter.

O: 12SEP2023 05:23:16 55.1N 156.4W mb=4.7 EMSC SOUTH OF ALASKA

P: 13SEP2023 156541 54.7N 156.9W 3.5-5.0 AAAAA Alaska Peninsula

An unusual earthquake of M 3.0 hit northern Nunavut, Canada today near Grise Fiord. It was not reported felt in this remote area where it occurred near local solar midnight, a time when tidal stresses may have helped promote enhanced seismicity. This is the first earthquake within about 300 km of this epicenter reported by NEIC since an M 4.0 on August 18, 2008. Forecast 156309 had expected today's event within about 25 km around September 5.

O: 10SEP2023 06:42:43 80.3N 89.6W MB=3.0 ECAN of Grise Fiord, NU

P: 5SEP2023 156309 80.0N 90.0W 4.0-5.7 BAAAA Arctic Ocean Region

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 11SEP2023 17:32:00 24.4N 94.9E mb=4.9 EMSC MYANMAR-INDIA BORDER REGION

P: 3SEP2023 156158 24.0N 94.0E 4.0-5.5 CAAAA Myanmar

NEIC reported this earthquake of M 4.9 in Myanmar was felt with intensity II-III in the area(s) of Bangladesh with IV in Silhat and in Gauhati Assam also with IV and lesser shaking in Manipur, Sibsagar, and Itanagar India.

O: 11SEP2023 20:32:41 20.8N 101.1E ML=4.1 EMSC LAOS

P: 20SEP2023 156429 20.0N 96.0E 4.0-5.4 CACAA Myanmar

O: 11SEP2023 22:51:07 55.5N 166.5E Mw=5.3 EMSC KOMANDORSKIYE OSTROVA REGION

P: 5SEP2023 156287 55.0N 166.0E 4.0-5.8 CAAAA Komandorsky Isl

P: 13SEP2023 156552 55.0N 164.0E 4.0-5.9 AABAA Komandorsky Isl

INDONESIA AND PHILIPPINES

BMG reported an earthquake of M 3.1 in Java was felt with intensity II-III in the area(s) of Java at Cilaku, Karangtengah and Cianjur.

O: 11SEP2023 12:51:33 1.1N 127.5E Mw=6.0 EMSC HALMAHERA, INDONESIA

O: 11SEP2023 09:33:37 1.3N 126.2E ML=4.1 EMSC MOLUCCA SEA

P: 10SEP2023 156100 2.0N 126.0E 4.0-5.4 AABAA Mindanao, Philippines

O: 11SEP2023 18:23:38 2.1N 98.9E ML=4.0 EMSC NORTHERN SUMATRA, INDONESIA

P: 12SEP2023 156376 3.0N 97.0E 4.0-5.7 AABAA Nicobar Islands

O: 11SEP2023 08:23:40 5.1S 144.7E mb=4.5 EMSC NEW GUINEA, PAPUA NEW GUINEA

P: 11SEP2023 156395 4.0S 143.0E 4.0-5.5 ABBAA Papua New Guinea

P: 13SEP2023 156395 3.0S 144.0E 4.0-5.4 ACAAA Papua New Guinea

O: 11SEP2023 22:09:28 5.6N 94.9E mb=4.6 EMSC NORTHERN SUMATRA, INDONESIA

P: 5SEP2023 156102 5.0N 95.0E 4.0-5.9 CAAAA Nicobar Islands

P: 15SEP2023 156376 4.0N 95.0E 4.0-5.9 BBAAA Nicobar Islands

O: 11SEP2023 12:27:29 7.0S 129.7E ML=4.4 EMSC KEPULAUAN BABAR, INDONESIA

P: 14SEP2023 156379 7.0S 127.0E 4.0-5.4 BABAA Banda Sea

O: 11SEP2023 17:30:12 19.2N 121.1E mb=5.0 EMSC BABUYAN ISL REGION, PHILIPPINE

P: 10SEP2023 156136 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

P: 11SEP2023 156410 19.0N 121.0E 3.5-4.9 AAAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 12SEP2023 02:42:30 11.4N 86.1W ML=4.7 EMSC NEAR COAST OF NICARAGUA

P: 11SEP2023 156414 11.0N 86.0W 3.5-5.2 AAAAA Nicaragua

O: 12SEP2023 02:40:51 15.2N 93.4W Mw=5.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 12SEP2023 156401 16.0N 93.0W 3.5-5.5 AAAAA Chiapas, Mexico

NEIC reported this earthquake of M 5.1 in Chiapas, Mexico was felt with intensity II-III in the area(s) of Chiapas, Mexico in Salina Cruz, Oaxaca and Istahuacan, Huehuetenango, Guatemala.

O: 11SEP2023 10:29:19 15.9N 96.4W ML=4.0 EMSC OAXACA, MEXICO

P: 12SEP2023 156417 15.0N 97.0W 3.5-5.4 AAAAA Oaxaca, Mexico

O: 12SEP2023 04:04:57 16.6N 98.4W ML=4.0 EMSC GUERRERO, MEXICO

O: 11SEP2023 21:28:56 16.3N 98.1W ML=4.2 EMSC OAXACA, MEXICO

P: 8SEP2023 156145 17.0N 98.0W 3.5-5.4 BAAAA Oaxaca, Mexico

O: 12SEP2023 04:33:16 17.3N 100.4W ML=4.0 EMSC GUERRERO, MEXICO

P: 14SEP2023 156418 16.0N 100.0W 3.5-5.6 ABAAA Oaxaca, Mexico

O: 11SEP2023 18:23:36 17.4N 101.4W ML=3.6 EMSC OFFSHORE GUERRERO, MEXICO

P: 14SEP2023 156412 19.0N 102.0W 3.5-5.4 BAAAA Michoacan, Mexico

O: 11SEP2023 11:51:47 19.1N 70.9W ML=3.0 EMSC DOMINICAN REPUBLIC

O: 11SEP2023 10:29:01 19.7N 71.2W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 9SEP2023 156147 19.0N 71.0W 3.4-5.1 AAAAA Puerto Rico

O: 12SEP2023 04:58:39 20.6S 68.6W Mw=5.4 EMSC TARAPACA, CHILE

P: 9SEP2023 156339 20.0S 71.0W 4.0-5.4 BABAA So. Peru/Bolivia

P: 12SEP2023 156591 22.0S 68.0W 4.0-6.1 ABAAA Argentina

NEIC reported this earthquake of M 5.4 in Northern Chile was felt with intensity II-III in the area(s) of Northern Chile in Tarapaca at Arica and Iquique and in Calama, Antofagasta.

O: 11SEP2023 21:40:22 20.8S 65.4W mb=4.1 EMSC POTOSI, BOLIVIA

P: 9SEP2023 156329 22.0S 67.0W 4.0-5.5 ABBAA Argentina

O: 11SEP2023 13:37:08 27.2S 71.2W Mw=5.3 EMSC OFFSHORE ATACAMA, CHILE

P: 11SEP2023 156594 29.0S 71.0W 4.0-5.5 ABAAA Coast Central Chile

NEIC reported this earthquake of M 5.4 in Atacama, Chile was felt with intensity II-III in the area(s) of Atacama, Chile in Copiapo.

AFRICA AND EUROPE

O: 12SEP2023 00:25:37 31.1N 8.4W ML=3.5 EMSC MOROCCO

O: 11SEP2023 19:47:45 31.3N 8.1W mb=3.8 EMSC MOROCCO

O: 11SEP2023 19:47:45 31.3N 8.1W mb=4.0 ANSS MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

NEIC reported this earthquake of M 4.0 in Morocco was felt with intensity II-III in the area(s) of Morocco in Marrakech.

O: 11SEP2023 08:01:53 43.5N 45.1E mb=4.2 EMSC CAUCASUS REGION, RUSSIA

P: 10SEP2023 156235 43.0N 44.0E 3.5-4.9 AAAAA Caucasus/Caspian Sea

O: 11SEP2023 13:21:26 46.1N 13.7E ML=3.4 EMSC SLOVENIA

P: 12SEP2023 156503 46.0N 14.0E 3.0-4.9 AAAAA Austria

O: 11SEP2023 19:02:55 63.7N 23.3W ML=3.5 EMSC ICELAND REGION

P: 4SEP2023 156303 63.0N 23.0W 3.0-4.4 CAAAA Iceland area

O: 11SEP2023 17:49:47 75.5N 9.8E mb=3.4 EMSC GREENLAND SEA

P: 14SEP2023 156579 74.0N 14.0E 3.0-4.6 BBAAA Norway

SOUTHWEST PACIFIC

O: 11SEP2023 10:56:11 8.1S 158.4E mb=4.7 EMSC SOLOMON ISLANDS

P: 5SEP2023 156120 7.0S 155.0E 4.0-5.5 CBCAA Solomon Islands

O: 12SEP2023 01:18:55 10.1S 161.4E Mw=5.1 EMSC SOLOMON ISLANDS

P: 4SEP2023 156326 11.0S 161.0E 4.0-5.5 CAAAA Vanuatu Islands

O: 12SEP2023 01:38:55 22.3S 169.7E mb=5.0 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 14SEP2023 156596 21.0S 169.0E 4.0-5.4 ABAAA Loyalty Islands

OCEAN RIDGES

O: 11SEP2023 09:20:57 0.8N 26.1W Mw=5.9 EMSC CENTRAL MID-ATLANTIC RIDGE

P: 8SEP2023 156092 1.0N 28.0W 4.0-5.4 BABAA Central Mid-Atlantic Ridg

ZEALANDIA AND AUSTRALIA REGION

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

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 11SEP2023 18:30:09 24.5N 127.8E mb=4.5 EMSC SOUTHEAST OF RYUKYU ISLANDS

P: 7SEP2023 156160 26.0N 128.0E 4.0-5.4 BBAAA Ryukyu Islands

O: 11SEP2023 16:46:12 29.3N 129.4E mb=5.0 EMSC RYUKYU ISLANDS, JAPAN

P: 12SEP2023 156427 29.0N 130.0E 4.0-5.4 AAAAA Kyushu Japan

O: 12SEP2023 01:00:05 35.3N 141.3E mb=4.4 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 10SEP2023 156197 35.0N 142.0E 4.0-5.4 AAAAA Off East Coast Honshu

O: 11SEP2023 23:41:30 37.8N 141.8E ML=4.2 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 11SEP2023 156471 38.0N 142.0E 4.0-5.6 AAAAA Off East Coast Honshu

O: 12SEP2023 01:00:34 46.0N 152.2E mb=4.7 EMSC EAST OF KURIL ISLANDS

P: 7SEP2023 156269 47.0N 153.0E 3.5-5.4 BAAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 11SEP2023 08:25:51 30.9N 115.4W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO

O: 11SEP2023 09:09:18 30.6N 116.2W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

O: 11SEP2023 07:02:31 30.8N 115.3W ML=3.7 EMSC BAJA CALIFORNIA, MEXICO

O: 11SEP2023 10:00:54 31.3N 116.1W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

O: 11SEP2023 20:32:34 31.6N 116.1W ML=3.5 EMSC BAJA CALIFORNIA, MEXICO

P: 13SEP2023 156477 30.8N 116.2W 2.5-4.8 AAAAA So. California

O: 11SEP2023 09:20:15 33.5N 116.5W ML=2.1 EMSC SOUTHERN CALIFORNIA

P: 11SEP2023 156480 33.7N 116.1W 2.5-4.8 AAAAA So. California

O: 12SEP2023 06:00:42 35.4N 119.4W ML=2.0 EMSC CENTRAL CALIFORNIA

P: 11SEP2023 156484 35.0N 119.2W 2.5-4.4 AAAAA So. California

O: 11SEP2023 20:49:57 36.2N 120.8W MD=2.1 EMSC CENTRAL CALIFORNIA

P: 16SEP2023 156444 36.4N 121.1W 2.5-4.5 BAAAA Central California

O: 11SEP2023 09:35:33 39.3N 122.8W MD=2.5 EMSC NORTHERN CALIFORNIA

P: 12SEP2023 156445 39.2N 123.1W 2.5-4.7 AAAAA Central California

O: 11SEP2023 09:30:57 39.9N 121.0W MD=2.3 EMSC NORTHERN CALIFORNIA

O: 12SEP2023 06:29:31 40.2N 121.2W MD=2.4 EMSC NORTHERN CALIFORNIA

O: 11SEP2023 07:17:49 39.9N 121.0W MD=2.4 EMSC NORTHERN CALIFORNIA

P: 14SEP2023 156525 40.9N 122.0W 2.5-4.4 BAAAA Northern California

NEIC reported this earthquake of M 2.5 in Northern California was felt with intensity II-III in the area(s) of Northern California in Meadow Valley and Quincy.

O: 12SEP2023 06:59:02 40.2N 117.7W ML=2.0 EMSC NEVADA

P: 14SEP2023 156504 41.3N 118.7W 2.5-4.6 AAAAA California/Nevada area

O: 11SEP2023 18:48:34 41.0N 121.6W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 13SEP2023 156525 40.6N 122.4W 2.5-4.5 AAAAA Northern California

P: 14SEP2023 156525 40.9N 122.0W 2.5-4.4 BAAAA Northern California

ALASKA

O: 12SEP2023 05:23:16 55.1N 156.4W mb=4.7 EMSC SOUTH OF ALASKA

P: 13SEP2023 156541 54.7N 156.9W 3.5-5.0 AAAAA Alaska Peninsula

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 12SEP2023 02:51:13 50.7N 130.5W ML=3.2 EMSC VANCOUVER ISLAND, CANADA REGIO

P: 13SEP2023 156546 50.5N 130.4W 3.0-4.9 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 11SEP2023 07:45:29 31.7N 104.4W ML=2.2 EMSC WESTERN TEXAS

O: 11SEP2023 11:32:28 31.7N 104.4W ML=3.0 EMSC WESTERN TEXAS

O: 12SEP2023 01:29:06 31.5N 104.2W ML=2.1 EMSC WESTERN TEXAS

P: 13SEP2023 156474 31.4N 103.8W 2.0-4.1 AAAAA SW U.S.A

O: 11SEP2023 11:59:15 32.7N 109.1W ML=2.8 EMSC ARIZONA

P: 12SEP2023 156473 34.7N 109.0W 2.0-4.3 ABAAA SW U.S.A

NEIC reported this earthquake of M 2.8 in Arizona was felt with intensity II-III in the area(s) of Arizona in Thatcher and in Lordsburg, New Mexico.

EASTERN U.S./CANADA

O: 11SEP2023 20:07:23 29.1N 97.9W ML=3.1 EMSC SOUTHERN TEXAS

O: 11SEP2023 23:49:24 29.1N 97.9W ML=3.0 EMSC SOUTHERN TEXAS

O: 11SEP2023 23:56:08 29.0N 97.9W ML=2.8 EMSC SOUTHERN TEXAS

P: 13SEP2023 156430 28.0N 98.0W 3.0-4.6 AAAAA Northern Mexico

NEIC reported these earthquakes of M 3.1 and M 3.2 in Southern Texas were felt with intensity II-III in the area(s) of Southern Texas in Floresville, San Antonia and San Marcos.

O: 11SEP2023 10:05:18 35.0N 97.6W ML=2.2 EMSC OKLAHOMA

P: 11SEP2023 156492 35.0N 97.0W 2.0-4.2 AAAAA Southern Plains

O: 11SEP2023 07:35:47 45.1N 74.1W MB=2.5 ECAN of Huntingdon, QC

P: 8SEP2023 156253 45.7N 75.2W 2.0-4.0 BAAAA New York State

O: 10SEP2023 07:07:47 49.4N 68.0W MB=1.4 ECAN of Franquelin, QC

P: 11SEP2023 156513 49.3N 67.5W 2.0-4.2 AAAAA Maine

O: 10SEP2023 06:42:43 80.3N 89.6W MB=3.0 ECAN of Grise Fiord, NU

P: 5SEP2023 156309 80.0N 90.0W 4.0-5.7 BAAAA Arctic Ocean Region

O: 9SEP2023 19:01:27 47.8N 69.8W MB=1.0 ECAN of Saint-Sim├⌐on, QC

P: 9SEP2023 156251 47.3N 70.5W 2.0-4.1 AAAAA New England

O: 9SEP2023 11:31:18 43.6N 70.8W MB=2.0 ECAN of Portland, ME

P: 6SEP2023 156245 44.4N 68.2W 2.0-4.4 BABAA Maine

HAWAII

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

ATERSHOCKS CONTINUE IN MOROCCO

EARTHQUAKE SUMMARY FOR SEPTEMBER 10, 2023

An aftershock of M 4.2 shook areas of Morocco today. NEIC reported it was felt with intensity II-III in Morocco at Taoudannt, Marrakech, Agadir, Ouarzazate. Safi, Casablanca and Bouznika. More than 3000 confirmed deaths occurred with the M 6.8 earthquake of September 8, 2023. In the previous issue of this summary the tolls from the earthquake Morocco had been noted as:

"Death tolls continued to rise in the M 6.8 earthquake in Morocco. The reported number of dead in this earthquake is now more than 2100. An earthquake in Morocco in 1960 killed more than 12,000. BBC reports total destruction in many remote villages, so the tolls are expected to rise. This is the most deadly earthquake in the world since the M 7.7 in Turkey of February 6, 2023 which reportedly killed 53560. The previous most deaths in recent earthquakes occurred in Sulawesi on September 28, 2018 (4340) and Nepal on April 25, 2-15 (8964), the only other comparable events in the past 10 years in the world.

Detailed description of the mainshock in Morocco can be found in the previous issue of this summary. Light aftershocks continued but did little damage today. Forecast 156187 had expected regional seismic enhancement in Morocco was likely in early September. Far field seismic enhancement today from Morocco appears to have hit Sulawesi (M 6.3) and Bali (M 5.8) in Indonesia (120 degrees - node 3); Sumatra (M 4.1, 4.2, 4.6) (103 degrees), Costa Rica (M 4.6 node 5 72 degrees); the Galapagos (m 4.5, 4.6, 4.7) (node 4 90 degrees); and the Virgin Islands M 3.9 node 7 - 52 degrees)." (September 10, 2023)

O: 10SEP2023 08:00:01 31.0N 8.5W mb=4.2 EMSC MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

An eruption of Mt. Kilauea volcano in Hawaii today followed an M 3.5 near local solar noon. This is the third eruption of Kilauea this year and is substantial with many lava flow and ash. Forecast 1556131 had expected enhanced seismicity in Hawaii was likely around September 7.

NEIC reported this earthquake of M 3.5 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Hawaii National Park.

O: 11SEP2023 00:47:18 19.4N 155.3W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII

O: 11SEP2023 00:48:22 19.4N 155.3W ML=3.5 EMSC ISLAND OF HAWAII, HAWAII

O: 11SEP2023 00:49:45 19.4N 155.3W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII

O: 11SEP2023 01:26:58 19.4N 155.3W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII

P: 7SEP2023 156131 18.8N 155.2W 3.0-4.6 BAAAA Hawaii

The largest earthquakes in the world today were of M 5.3 - in the Kermadec Islands and in the Ryukyu Islands, Japan. Neither is unusual nor felt in their respective regions. Forecasts 156160 and 156156 expected the activity in the Ryukyu Islands in early September while forecast 156334 had expected the event in the Kermadec Islands within about 25 km was likely around September 8.

O: 10SEP2023 17:58:27 31.1N 131.5E mb=4.7 EMSC KYUSHU, JAPAN

O: 10SEP2023 15:02:03 29.3N 129.5E Mw=5.3 EMSC RYUKYU ISLANDS, JAPAN

O: 10SEP2023 22:57:57 29.4N 129.3E ML=4.1 EMSC RYUKYU ISLANDS, JAPAN

P: 5SEP2023 156160 29.0N 128.0E 4.0-5.6 BAAAA Ryukyu Islands

P: 7SEP2023 156156 29.0N 131.0E 4.0-5.6 BABAA Kyushu Japan

O: 10SEP2023 15:03:18 29.0S 177.3W Mw=5.3 EMSC KERMADEC ISLANDS, NEW ZEALAND

P: 8SEP2023 156334 29.0S 177.0W 4.0-5.4 AAAAA No. Kermadec Islands

A series of three moderate earthquakes were felt in Iraq today. NEIC reported this earthquake of M 4.7 in Iraq was felt with intensity II-III in the area(s) of Iraq in Chamchamal and Mossul (IV) and in Kirkuk, Irbil, Baghdad, Mehabad and ash Shikhan. The last earthquake with M>=4.7 within about 150 km of this epicenter in Iraq was recorded on March 16, 2023 (M 5.1) and on February 4, 2023 (M 4.7) - two days before the massive earthquakes in Turkey of February 6 (M 7.7+) after a two-year hiatus of seismicity at moderate levels in the area. Today's activity occurred near local solar midnight and may have been promoted by tidal stresses which are new maximum at this hour. Forecasts 156219 and 156227 had expected today's activity Iraq was like in early September.

O: 10SEP2023 21:42:48 35.1N 44.7E ML=4.6 EMSC IRAQ

O: 10SEP2023 21:43:49 35.1N 44.8E mb=4.7 EMSC IRAQ

P: 6SEP2023 156219 33.0N 46.0E 3.8-5.3 BCAAA So. Iran

O: 10SEP2023 21:44:13 36.4N 43.8E ML=4.4 EMSC IRAQ

P: 1SEP2023 156227 38.0N 43.0E 3.5-4.9 CBAAA Turkey

The largest earthquake in the U.S. or Canada today was an M 4.9 in the region of the Alaska Peninsula. It was reported felt with intensity II in Sand Point, Alaska. Alaska Peninsula. This appears to be an aftershock of the M 5.1 which occurred August 30, 2023. At the time this summary noted:

"The largest earthquake in the U.S. or Canada today was an M 5.1 in the Alaska Peninsula. NEIC reported it was felt with intensity II-III in Alaska at Sand Point and King Cove. While a foreshock of M 4.6 hit this same area on August 28, 2023 near local solar noon, this may be an aftershock of the M 7.4 on July 16 and M 5.6 which hit the same area with the previous full moon on August 3, 2023 as noted in previous issues of this summary:

"The strongest earthquake in the U.S. or Canada today was an M 4.6 off the Alaska Peninsula where NEIC reported it was felt with intensity IV in King Cove. This is the largest earthquake in the Alaska Peninsula area within about 150 km of this epicenter since an M 5.6 on August 3, 2023.

and

"The strongest earthquake in the world, the U.S. or Canada today was an M 5.6 in the Unimak Island area of Alaska. NEIC reported it was felt with intensity IV in Sand Point, King Cove and II-III in False Pass, Chignik Lagoon, Alaska. This is the strongest aftershock to date of the M 7.2-7.4 of July 16, 2023 in the Alaska Peninsula about 50 km east of today's epicenter." (August 30, 2023)

Forecast 156295 had expected today's event within about 50 was likely around

September 10.

O: 10SEP2023 13:03:53 54.3N 161.0W mb=4.9 EMSC ALASKA PENINSULA

P: 10SEP2023 156295 54.6N 161.7W 3.5-5.1 AAAAA Unimak Islands, Aleutians

A moderate earthquake of M 4.4 also occurred today in the Northwest Territories, Canada. It was probably felt lightly in the epicentra area near Nahanni Butte but this has not been reported. The last earthquake with M>=4.4 within about 200 km of today's epicenter occurred on October 24, 2020 with M 4.7. Like today's event that earthquake occurred with an M 4.9 in the Alaska Peninsula. At the time this summary noted:

"The series of moderate earthquakes in the Northwest Territories, Canada continued today with events of M 4.5-4.7 and M 4.0. This continues recent activation of this epicenter which included an M 5.1 on October 14 and an M 4.3 on October 18. The only other event in the region in the past year with M>=4.7 occurred as an M 4.7 on July 25, 2020, three days after the M 7.8 mainshock in the Alaska Peninsula." (October 24, 2020)

and

The strongest earthquake in the U.S. or Canada today was an M 4.4 in the Northwest Territories of Canada. The only earthquake in the past six years within about 300 km of this epicenter with M>=4.4 was an M 4.7 on July 25, 2020. Prior to that earthquakes of M 4.4 and 4.5 occurred in March and July, 2014 in this area. The strongest earthquake in this area in the past 30 years was an M 5.6 on June 10, 1990." (October 24, 2020)

Forecast 156306 had expected today's event within about 25 km was likely in early September.

O: 11SEP2023 00:12:37 61.9N 124.1W MB=4.4 ECAN of Nahanni Butte, NT

O: 11SEP2023 00:12:37 61.9N 124.1W ML=4.4 EMSC NORTHWEST TERRITORIES, CANADA

P: 2SEP2023 156306 62.1N 124.2W 2.5-4.3 CAAAA Northwest Terr., Canada

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 10SEP2023 21:42:48 35.1N 44.7E ML=4.6 EMSC IRAQ

O: 10SEP2023 21:43:49 35.1N 44.8E mb=4.7 EMSC IRAQ

P: 6SEP2023 156219 33.0N 46.0E 3.8-5.3 BCAAA So. Iran

O: 10SEP2023 21:44:13 36.4N 43.8E ML=4.4 EMSC IRAQ

P: 1SEP2023 156227 38.0N 43.0E 3.5-4.9 CBAAA Turkey

O: 11SEP2023 01:54:38 40.1N 71.7E mb=4.5 EMSC KYRGYZSTAN

P: 8SEP2023 156243 41.0N 77.0E 4.0-5.5 BACAA Kirgizstan/Xinjiang

O: 10SEP2023 07:33:29 54.8N 111.5E mb=4.0 EMSC LAKE BAYKAL REGION, RUSSIA

P: 3SEP2023 156292 56.0N 110.0E 3.0-4.5 CBAAA So. Siberia

INDONESIA AND PHILIPPINES

O: 10SEP2023 10:21:00 1.6N 127.0E mb=4.9 EMSC HALMAHERA, INDONESIA

P: 10SEP2023 156100 2.0N 126.0E 4.0-5.4 AAAAA Mindanao, Philippines

O: 11SEP2023 06:14:21 3.1S 139.8E mb=4.9 EMSC PAPUA, INDONESIA

O: 10SEP2023 15:25:20 2.0S 140.0E ML=4.1 EMSC NEAR N COAST OF PAPUA, INDONES

P: 7SEP2023 156115 3.0S 140.0E 4.0-5.4 BAAAA Papua New Guinea

O: 10SEP2023 22:38:29 2.6N 127.2E ML=4.4 EMSC MOLUCCA SEA

O: 10SEP2023 15:30:29 2.7S 128.7E ML=4.1 EMSC CERAM SEA, INDONESIA

O: 10SEP2023 07:13:04 2.5N 127.1E mb=4.5 EMSC MOLUCCA SEA

P: 10SEP2023 156100 2.0N 126.0E 4.0-5.4 AAAAA Mindanao, Philippines

O: 10SEP2023 20:17:28 3.7S 140.2E ML=4.2 EMSC PAPUA, INDONESIA

P: 7SEP2023 156115 3.0S 140.0E 4.0-5.4 BAAAA Papua New Guinea

O: 10SEP2023 19:44:30 4.6N 126.2E ML=4.1 EMSC KEPULAUAN TALAUD, INDONESIA

P: 3SEP2023 156101 5.0N 126.0E 4.0-5.4 CAAAA Mindanao, Philippines

O: 10SEP2023 21:58:14 6.0S 130.7E mb=4.4 EMSC BANDA SEA

P: 3SEP2023 156105 8.0S 129.0E 4.0-5.4 CBBAA Banda Sea

O: 10SEP2023 19:43:13 8.0S 126.4E ML=4.1 EMSC KEPULAUAN BARAT DAYA, INDONESIA

O: 10SEP2023 21:46:47 6.8S 125.0E mb=4.5 EMSC BANDA SEA

P: 7SEP2023 156105 7.0S 125.0E 4.0-5.5 BAAAA Banda Sea

CENTRAL AND SOUTH AMERICA

O: 10SEP2023 08:51:30 8.3N 82.9W ML=4.2 EMSC PANAMA-COSTA RICA BORDER REGIO

P: 10SEP2023 156095 7.0N 78.0W 4.0-5.9 ABCAA Colombia

O: 10SEP2023 15:35:35 8.4S 76.4W ML=4.1 EMSC CENTRAL PERU

P: 5SEP2023 156114 8.0S 78.0W 4.0-5.7 BABAA No. Peru

O: 10SEP2023 11:34:34 10.9N 62.4W mb=4.7 EMSC OFFSHORE SUCRE, VENEZUELA

P: 7SEP2023 156149 11.0N 63.0W 3.4-4.9 BAAAA Windward Islands

NEIC reported this earthquake of M 4.7 in Venezuela was felt with intensity II-III in the area(s) of Trinidad and Tobago and Grenada.

O: 11SEP2023 05:51:00 16.0N 94.1W ML=4.3 EMSC OFFSHORE CHIAPAS, MEXICO

O: 10SEP2023 11:28:11 15.6N 95.2W ML=4.2 EMSC OFFSHORE OAXACA, MEXICO

P: 8SEP2023 156126 15.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico

O: 10SEP2023 18:38:37 17.5N 70.4W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

P: 9SEP2023 156147 19.0N 71.0W 3.4-5.1 ABAAA Puerto Rico

O: 10SEP2023 08:50:31 18.4N 64.5W MD=4.0 EMSC VIRGIN ISLANDS REGION

P: 6SEP2023 156133 18.0N 65.0W 3.0-5.1 BAAAA Leeward Islands

NEIC reported this earthquake of M 4.1 in the Virgin Islands was felt with intensity II-III in the area(s) of Puerto Rico.

O: 11SEP2023 06:09:46 18.8N 68.4W MD=3.6 EMSC DOMINICAN REPUBLIC REGION

O: 10SEP2023 08:37:43 18.9N 68.3W MD=3.4 EMSC DOMINICAN REPUBLIC REGION

O: 10SEP2023 12:01:31 19.1N 68.4W MD=3.2 EMSC DOMINICAN REPUBLIC REGION

O: 10SEP2023 20:49:56 18.7N 68.2W MD=3.4 EMSC DOMINICAN REPUBLIC REGION

P: 9SEP2023 156147 18.0N 69.0W 3.4-5.1 AAAAA Puerto Rico

O: 10SEP2023 12:32:07 19.1N 105.4W ML=4.0 EMSC OFFSHORE JALISCO, MEXICO

P: 9SEP2023 156127 18.0N 106.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

O: 10SEP2023 20:02:57 19.6N 64.9W MD=3.6 EMSC VIRGIN ISLANDS REGION

P: 6SEP2023 156150 20.0N 63.0W 3.0-4.4 BABAA Bahamas/No. Caribbean

O: 10SEP2023 17:31:29 20.2N 72.6W ML=3.5 EMSC HAITI REGION

P: 6SEP2023 156151 20.0N 73.0W 3.0-4.6 BAAAA Bahamas/No. Caribbean

O: 10SEP2023 14:26:06 21.2N 106.2W ML=4.1 EMSC ISLAS MARIAS REG., NAYARIT, ME

P: 9SEP2023 156127 18.0N 106.0W 3.5-5.1 ACAAA Coast of Jalisco, Mexico

O: 10SEP2023 09:55:07 27.9S 66.6W mb=4.6 EMSC CATAMARCA, ARGENTINA

P: 6SEP2023 156330 28.0S 67.0W 4.0-5.8 BAAAA Argentina

O: 11SEP2023 04:28:18 29.4S 68.1W Mw=4.3 EMSC LA RIOJA, ARGENTINA

P: 2SEP2023 156330 29.0S 68.0W 4.0-5.9 CAAAA Argentina

P: 6SEP2023 156330 28.0S 67.0W 4.0-5.8 BBAAA Argentina

O: 10SEP2023 07:38:15 30.0S 71.3W mb=4.4 EMSC COQUIMBO, CHILE

O: 10SEP2023 18:55:13 31.3S 68.7W mb=4.7 EMSC SAN JUAN, ARGENTINA

P: 6SEP2023 156348 30.0S 72.0W 4.0-5.6 BAAAA Coast Central Chile

NEIC reported this earthquake of M 4.4 in Coquimbo, Chile was felt with intensity II-III in the area(s) of Coquimbo, Chile in Coquimbo and La Serena.

O: 11SEP2023 01:56:48 32.1S 71.6W mb=4.8 EMSC OFFSHORE COQUIMBO, CHILE

P: 7SEP2023 156345 34.0S 72.0W 4.0-5.4 BBAAA Central Chile

AFRICA AND EUROPE

O: 10SEP2023 08:00:01 31.0N 8.5W mb=4.2 EMSC MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

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

SOUTHWEST PACIFIC

O: 10SEP2023 12:52:47 17.8S 175.5W mb=4.1 EMSC TONGA

O: 11SEP2023 04:16:05 18.2S 177.7W mb=4.6 EMSC FIJI REGION

P: 8SEP2023 156325 17.0S 179.0W 4.0-5.5 BBAAA Tonga Islands

OCEAN RIDGES

O: 10SEP2023 07:46:06 2.4N 102.1W mb=4.6 EMSC GALAPAGOS TRIPLE JUNCTION REGI

O: 11SEP2023 05:14:00 55.8S 27.2W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION

P: 7SEP2023 156362 58.0S 26.0W 4.0-6.0 BCAAA So. Sandwich Islands

ZEALANDIA AND AUSTRALIA REGION

O: 10SEP2023 15:03:18 29.0S 177.3W Mw=5.3 EMSC KERMADEC ISLANDS, NEW ZEALAND

P: 8SEP2023 156334 29.0S 177.0W 4.0-5.4 AAAAA No. Kermadec Islands

O: 10SEP2023 16:30:20 32.8S 177.7W mb=4.7 EMSC SOUTH OF KERMADEC ISLANDS

O: 10SEP2023 22:36:52 32.9S 179.2W mb=4.6 EMSC SOUTH OF KERMADEC ISLANDS

P: 8SEP2023 156355 32.0S 178.0W 4.0-5.4 AAAAA So. Kermadec Islands

O: 11SEP2023 03:43:30 35.7S 179.5E ML=4.2 EMSC OFF E. COAST OF N. ISLAND, N.Z.

P: 7SEP2023 156349 37.0S 180.0E 3.5-4.9 BBAAA E. of North Islands N.Z.

P: 7SEP2023 156356 34.0S 179.0E 4.0-5.4 BBAAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 10SEP2023 17:58:27 31.1N 131.5E mb=4.7 EMSC KYUSHU, JAPAN

O: 10SEP2023 15:02:03 29.3N 129.5E Mw=5.3 EMSC RYUKYU ISLANDS, JAPAN

O: 10SEP2023 22:57:57 29.4N 129.3E ML=4.1 EMSC RYUKYU ISLANDS, JAPAN

P: 5SEP2023 156160 29.0N 128.0E 4.0-5.6 BAAAA Ryukyu Islands

P: 7SEP2023 156156 29.0N 131.0E 4.0-5.6 BABAA Kyushu Japan

O: 10SEP2023 19:53:15 37.5N 134.7E mb=4.0 EMSC SEA OF JAPAN

P: 8SEP2023 156192 38.0N 135.0E 3.5-4.9 AAAAA No. Honshu, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 10SEP2023 16:05:02 30.8N 115.7W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

O: 10SEP2023 21:16:33 30.6N 116.2W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

O: 10SEP2023 14:34:15 31.2N 115.6W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO

P: 7SEP2023 156204 30.9N 116.2W 2.5-4.4 BAAAA So. California

O: 11SEP2023 06:09:17 33.8N 116.1W ML=2.5 EMSC SOUTHERN CALIFORNIA

O: 10SEP2023 14:28:42 33.2N 116.8W ML=2.9 EMSC SOUTHERN CALIFORNIA

P: 6SEP2023 156205 32.4N 115.8W 2.5-4.5 BAAAA So. California

NEIC reported the earthquake of M 2.9-3.0 in Southern California was felt with intensity II-III in the area(s) of Southern California in Santa Ysabel, Warner Springs, Valley Center, Escondido, Ramona.

NEIC reported the earthquake of M 2.6 in Southern California was felt with intensity II-III in the area(s) of Southern California in Indio, Coachella, La Quinta, Palm Desert, Desert Center, Murrieta, San Diego, Studio City.

O: 10SEP2023 08:52:10 38.2N 117.8W ML=2.0 EMSC NEVADA

P: 7SEP2023 156171 38.2N 118.2W 2.5-4.5 BAAAA California/Nevada area

O: 11SEP2023 02:38:21 40.6N 123.5W MD=2.3 EMSC NORTHERN CALIFORNIA

P: 9SEP2023 156177 39.7N 123.7W 2.5-4.6 AAAAA Central California

O: 10SEP2023 14:26:46 40.8N 121.9W MD=2.2 EMSC NORTHERN CALIFORNIA

O: 11SEP2023 05:05:00 41.0N 121.6W MD=2.2 EMSC NORTHERN CALIFORNIA

P: 8SEP2023 156256 40.4N 122.2W 2.5-4.4 AAAAA Northern California

ALASKA

O: 10SEP2023 12:16:24 51.9N 174.6W ML=3.7 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 7SEP2023 156280 52.3N 171.3W 3.5-5.1 AABAA Andreanoff Isls, Aleutians

O: 10SEP2023 13:03:53 54.3N 161.0W mb=4.9 EMSC ALASKA PENINSULA

P: 10SEP2023 156295 54.6N 161.7W 3.5-5.1 AAAAA Unimak Islands, Aleutians

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 11SEP2023 00:12:37 61.9N 124.1W MB=4.4 ECAN of Nahanni Butte, NT

O: 11SEP2023 00:12:37 61.9N 124.1W ML=4.4 EMSC NORTHWEST TERRITORIES, CANADA

P: 2SEP2023 156306 62.1N 124.2W 2.5-4.3 CAAAA Northwest Terr., Canada

ROCKY MOUNTAINS REGION

O: 11SEP2023 00:23:35 31.6N 104.3W ML=2.8 EMSC WESTERN TEXAS

O: 10SEP2023 17:18:53 31.6N 104.4W ML=2.5 EMSC WESTERN TEXAS

P: 8SEP2023 156201 32.6N 103.6W 2.0-4.1 AAAAA SW U.S.A

O: 10SEP2023 23:46:13 37.2N 104.8W mb=3.6 EMSC COLORADO

O: 11SEP2023 02:53:58 37.2N 104.8W ML=3.3 EMSC COLORADO

P: 8SEP2023 156179 36.9N 105.1W 2.0-4.0 AAAAA Colorado area

NEIC reported this earthquake of M 3.3 in Southern Colorado was felt with intensity II-III in the area(s) of Southern Colorado in Weston, Aguilar, Trinidad and Walsenburg.

An M 3.6 was also felt in the region today with intensity IV felt in Colorado at Weston and Trinidaa.

O: 10SEP2023 10:28:31 44.7N 111.0W ML=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING

P: 8SEP2023 156274 44.2N 110.3W 2.0-3.9 AAAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 10SEP2023 07:44:14 29.0N 97.8W ML=2.8 EMSC SOUTHERN TEXAS

P: 5SEP2023 156159 28.0N 98.0W 3.0-4.8 BAAAA Northern Mexico

HAWAII

O: 11SEP2023 00:47:18 19.4N 155.3W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII

O: 11SEP2023 00:48:22 19.4N 155.3W ML=3.5 EMSC ISLAND OF HAWAII, HAWAII

O: 11SEP2023 00:49:45 19.4N 155.3W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII

O: 11SEP2023 01:26:58 19.4N 155.3W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII

P: 7SEP2023 156131 18.8N 155.2W 3.0-4.6 BAAAA Hawaii

STRONG EARTHQUAKE IN SULAWESI, INDONESIA

EARTHQUAKE SUMMARY FOR SEPTEMBER 9, 2023

The strongest earthquake in the world today was an M 6.0-6.3 in Sulawesi, Indonesia. NEIC reported it was felt with intensity VI in Palu, Indonesia.

BMG reported this earthquake with M 6.3 was felt with intensity IV in Palu; V-VI Donggala, III in Poso, Sigi, Tolitoli, II-III in Pohuwatu, Kab. Gorontalo and Timur. This may be a strong aftershock of the Sulawesi earthquake of September 28, 2018 of M 7.5. That event was reported to have killed more than 4340 people. This earthquake occurred near local solar midnight and may have been promoted by strong tidal stresses which are greatest near this hour. Forecast 156091 had expected today's event within about 200 km was likely around September 6, 2023. This epicenter is located near the third node (120 degrees) from the M 6.8 in Morocco and may have been promoted by energy from that source. An M 5.8 at this same distance from Morocco hit Bali yesterday.

O: 9SEP2023 14:43:24 0.0S 119.9E Mw=6.0 EMSC MINAHASA, SULAWESI, INDONESIA

O: 9SEP2023 14:43:24 0.0S 119.8E Mw=6.3 BMG MINAHASA, SULAWESI, INDONESIA

P: 6SEP2023 156091 0.0N 122.0E 4.0-5.4 BABAA Celebes Sea

Death tolls continued to rise in the M 6.8 earthquake in Morocco. The reported number of dead in this earthquake is now more than 2100. An earthquake in Morocco in 1960 killed more than 12,000. BBC reports total destruction in many remote villages, so the tolls are expected to rise. This is the most deadly earthquake in the world since the M 7.7 in Turkey of February 6, 2023 which reportedly killed 53560. The previous most deaths in recent earthquakes occurred in Sulawesi on September 28, 2018 (4340) and Nepal on April 25, 2-15 (8964), the only other comparable events in the past 10 years in the world.

O: 09SEP2023 13:58:05 31.3N 8.1W mb=3.5 EMSC MOROCCO

O: 10SEP2023 06:36:10 31.3N 8.1W mb=3.2 EMSC MOROCCO

O: 09SEP2023 13:48:51 31.4N 7.7W mb=3.6 EMSC MOROCCO

O: 09SEP2023 23:11:36 31.5N 8.2W mb=3.2 EMSC MOROCCO

O: 09SEP2023 20:09:23 31.0N 8.5W mb=3.2 EMSC MOROCCO

O: 9SEP2023 11:19:13 31.3N 8.2W ML=3.6 EMSC MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

The strongest earthquake in the U.S. or Canada today was an M 4.8 in the Rat Islands, Aleutians, Alaska. It was not reported felt in this remote region. The last earthquake of larger magnitude in the Rat Islands occurred east of this epicenter with M 5.0 on July 19 and this may be a regional aftershock of that event. Forecast 156291 had expected today's event was likely within about 100 km of this around September 8, 2023.

O: 9SEP2023 18:06:00 51.6N 177.8E mb=4.8 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 8SEP2023 156291 51.0N 176.0E 4.0-5.7 AAAAA Rat Islands

An M 2.7 earthquake occurred today in Illinois and Indiana. NEIC reported it was felt with maximum intensity IV in Hazleton, Indiana with II-III shaking in Indiana at Bloomington, and in Illinois at Calhoun, Sumner, Claremont, Olney, Mount Carmel, Albion, Carterville and Springfield among others. This is the strongest earthquake in Illinois since an M 2.8 on April 13, 2022.

At the time this summary noted:

"An unusual earthquake of M 2.6-2.8 was widely felt today in southern Illinois. NEIC reported it was felt with maximum intensity IV in Springerton and II-III in Burnt Prairie, McLeanboro, Carmi, Fairfield and in Indiana at Evansville and Vincennes. This is the strongest earthquake in the region of Illinois within about 100 km of this epicenter since an M 2.6 on September 11, 2019 but the last of larger magnitude in this region was an M 3.8 on September 19, 2017." (April 13, 2022)

The event in Illinois in April, 2022, like today's accompanied moderate quake in the Rat Islands (M 4.6) and an M 4.9 in the Andreanof Islands.

Forecast 156190 had expected enhanced seismicity in this region of Illinois was likely in early September.

O: 10SEP2023 04:11:00 38.6N 88.0W ML=2.5 EMSC ILLINOIS

O: 10SEP2023 04:11:00 38.6N 88.0W ML=2.7 ANSS ILLINOIS

P: 5SEP2023 156190 37.0N 88.0W 2.0-4.1 BBAAA New Madrid area

P: 6SEP2023 156190 38.0N 91.0W 2.0-3.9 BABAA New Madrid area

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 9SEP2023 10:18:29 24.6N 92.7E mb=4.8 EMSC INDIA-BANGLADESH BORDER REGION

P: 3SEP2023 156158 24.0N 94.0E 4.0-5.5 CAAAA Myanmar

P: 4SEP2023 156158 27.0N 92.0E 4.0-5.4 BCAAA Myanmar

NEIC reported this earthquake of M 4.8 in India-Bangladesh was felt with intensity II-III in the area(s) of India-Bangladesh in Assam India with V in Silchar and Gauhati and IV in Shillong, Meghahaya and III in Karimganj. It was also felt in Silhat, Banglades with intensity II.

O: 10SEP2023 00:10:53 30.4N 94.9E mb=4.5 EMSC EASTERN XIZANG

O: 10SEP2023 04:01:13 30.3N 94.8E mb=4.4 EMSC EASTERN XIZANG

P: 4SEP2023 156217 32.0N 95.0E 3.5-4.9 CBAAA So. China

O: 10SEP2023 05:20:48 36.5N 71.3E mb=4.2 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 8SEP2023 156182 36.0N 71.0E 3.8-5.2 AAAAA Hindu Kush/Pakistan

INDONESIA AND PHILIPPINES

O: 9SEP2023 14:43:24 0.0S 119.9E Mw=6.0 EMSC MINAHASA, SULAWESI, INDONESIA

O: 9SEP2023 14:43:24 0.0S 119.8E Mw=6.3 BMG MINAHASA, SULAWESI, INDONESIA

P: 6SEP2023 156091 0.0N 122.0E 4.0-5.4 BABAA Celebes Sea

O: 10SEP2023 03:55:21 1.1N 97.1E ML=4.1 EMSC NIAS REGION, INDONESIA

O: 10SEP2023 03:55:22 1.1N 97.2E ML=4.2 BMG NIAS REGION, INDONESIA

P: 8SEP2023 156102 1.0N 97.0E 4.0-5.5 AAAAA Nicobar Islands

BMG reported this earthquake was felt with intensity II in Gunung Sitol, Indonesia.

O: 9SEP2023 17:30:59 1.6N 99.7E mb=4.6 EMSC NORTHERN SUMATRA, INDONESIA

P: 8SEP2023 156103 2.0N 99.0E 4.0-5.6 AAAAA So. Sumatera

O: 9SEP2023 19:23:48 2.0S 139.3E ML=4.2 EMSC NEAR N COAST OF PAPUA, INDONES

P: 7SEP2023 156115 3.0S 140.0E 4.0-5.4 AAAAA Papua New Guinea

O: 10SEP2023 05:42:39 2.4N 127.6E mb=4.9 EMSC MOLUCCA SEA

P: 10SEP2023 156100 2.0N 126.0E 4.0-5.4 AABAA Mindanao, Philippines

O: 10SEP2023 04:41:32 5.5S 147.0E mb=4.9 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 9SEP2023 156116 4.0S 143.0E 4.0-5.6 ABCAA Papua New Guinea

O: 9SEP2023 13:24:39 6.6S 129.8E ML=4.0 EMSC BANDA SEA

P: 3SEP2023 156105 8.0S 129.0E 4.0-5.4 CBAAA Banda Sea

O: 9SEP2023 10:11:54 12.0N 143.8E mb=4.6 EMSC GUAM REGION

P: 7SEP2023 156148 12.0N 141.0E 4.0-5.4 AACAA So. Marianas/Guam

O: 10SEP2023 00:41:15 17.4N 145.8E mb=4.6 EMSC ALAMAGAN REG, N. MARIANA ISLAN

P: 7SEP2023 156142 18.0N 145.0E 4.0-5.6 BAAAA No. Marianas

P: 10SEP2023 156142 16.0N 145.0E 4.0-5.5 ABAAA No. Marianas

CENTRAL AND SOUTH AMERICA

O: 9SEP2023 09:31:05 8.5N 82.9W ML=4.6 EMSC PANAMA-COSTA RICA BORDER REGIO

P: 10SEP2023 156095 7.0N 78.0W 4.0-5.9 ABCAA Colombia

O: 10SEP2023 05:37:47 14.8N 94.5W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 9SEP2023 11:45:18 15.4N 94.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

O: 9SEP2023 09:50:19 15.6N 95.1W ML=4.5 EMSC OFFSHORE OAXACA, MEXICO

P: 8SEP2023 156126 15.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico

O: 9SEP2023 09:51:57 16.1S 74.8W mb=4.3 EMSC NEAR COAST OF SOUTHERN PERU

P: 10SEP2023 156314 15.0S 71.0W 4.0-5.6 ABCAA Central Peru

O: 09SEP2023 12:57:04 15.8N 96.2W ML=4.1 EMSC OAXACA, MEXICO

O: 09SEP2023 13:57:56 15.9N 96.6W mb=4.5 EMSC OAXACA, MEXICO

O: 9SEP2023 12:24:24 16.3N 95.9W mb=4.2 EMSC OAXACA, MEXICO

P: 6SEP2023 156144 16.0N 96.0W 3.5-5.4 BAAAA Oaxaca, Mexico

NEIC reported this earthquake of M 4.5 in Oaxaca, Mexico was felt with intensity II-III in the area(s) of Oaxaca, Mexico in Oaxaca.

O: 10SEP2023 06:11:09 18.0N 102.6W ML=4.0 EMSC OFFSHORE MICHOACAN, MEXICO

P: 7SEP2023 156138 18.0N 102.0W 3.5-5.3 BAAAA Michoacan, Mexico

O: 09SEP2023 17:19:56 18.4N 73.5W ML=3.5 EMSC HAITI REGION

O: 9SEP2023 12:36:59 18.3N 73.5W ML=3.4 EMSC HAITI REGION

P: 6SEP2023 156151 20.0N 73.0W 3.0-4.6 BBAAA Bahamas/No. Caribbean

O: 09SEP2023 11:51:38 18.9N 65.0W MD=3.2 EMSC VIRGIN ISLANDS REGION

O: 09SEP2023 11:27:53 19.0N 65.1W MD=3.4 EMSC VIRGIN ISLANDS REGION

O: 09SEP2023 09:36:49 19.2N 66.5W MD=3.2 EMSC PUERTO RICO REGION

O: 10SEP2023 01:47:14 19.7N 64.7W MD=3.9 EMSC VIRGIN ISLANDS REGION

O: 9SEP2023 11:53:21 18.9N 65.0W MD=3.4 EMSC VIRGIN ISLANDS REGION

P: 6SEP2023 156133 18.0N 65.0W 3.0-5.1 BAAAA Leeward Islands

O: 10SEP2023 04:24:59 18.9N 68.1W MD=3.4 EMSC DOMINICAN REPUBLIC REGION

P: 9SEP2023 156147 18.0N 69.0W 3.4-5.1 AAAAA Puerto Rico

O: 10SEP2023 00:59:08 21.4S 68.5W ML=4.0 EMSC ANTOFAGASTA, CHILE

P: 9SEP2023 156332 22.0S 69.0W 4.0-5.8 AAAAA Coast No. Chile

O: 9SEP2023 08:14:06 32.4S 69.9W mb=4.3 EMSC MENDOZA, ARGENTINA

P: 4SEP2023 156348 31.0S 70.0W 4.0-5.8 BBAAA Central Chile

NEIC reported this earthquake of M 4.3 in Argentina was felt with intensity II-III in the area(s) of San Bernardo, Metropolitana, Chile.

O: 9SEP2023 20:03:13 33.9S 71.2W mb=4.0 EMSC REGION METROPOLITANA, CHILE

P: 7SEP2023 156345 34.0S 72.0W 4.0-5.4 AAAAA Central Chile

NEIC reported this earthquake of M 4.0 in Santiago, Chile was felt with intensity II-III in the area(s) of Santiago, Chile in Puente Alto and Lampa.

AFRICA AND EUROPE

O: 09SEP2023 13:58:05 31.3N 8.1W mb=3.5 EMSC MOROCCO

O: 10SEP2023 06:36:10 31.3N 8.1W mb=3.2 EMSC MOROCCO

O: 09SEP2023 13:48:51 31.4N 7.7W mb=3.6 EMSC MOROCCO

O: 09SEP2023 23:11:36 31.5N 8.2W mb=3.2 EMSC MOROCCO

O: 09SEP2023 20:09:23 31.0N 8.5W mb=3.2 EMSC MOROCCO

O: 9SEP2023 11:19:13 31.3N 8.2W ML=3.6 EMSC MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

O: 9SEP2023 18:21:30 1.4S 26.7E mb=4.6 EMSC DEMOCRATIC REPUBLIC OF THE CON

P: 4SEP2023 156111 6.0S 30.0E 3.0-4.4 BCCAA Lake Victoria area

NEIC reported an earthquake of M 3.5 in South Africa was felt with intensity II-III in the area(s) of South Africa in Gauteng at Alberton, Boksburg and Brakpan.

SOUTHWEST PACIFIC

O: 9SEP2023 18:06:18 21.1S 178.5W mb=4.5 EMSC FIJI REGION

P: 3SEP2023 156340 21.0S 179.0W 4.0-5.4 CAAAA Tonga Islands

P: 7SEP2023 156341 22.0S 175.0W 4.0-5.6 AACAA Tonga Islands

O: 9SEP2023 16:37:40 24.6S 176.3W mb=4.6 EMSC SOUTH OF FIJI ISLANDS

O: 09SEP2023 11:52:10 24.8S 175.3W mb=4.8 EMSC SOUTH OF TONGA

P: 6SEP2023 156342 24.0S 177.0W 4.0-5.4 BAAAA Tonga Islands

OCEAN RIDGES

O: 09SEP2023 08:28:35 2.1N 101.8W mb=4.6 EMSC GALAPAGOS TRIPLE JUNCTION REGION

O: 9SEP2023 08:20:05 2.2N 102.0W mb=4.7 EMSC GALAPAGOS TRIPLE JUNCTION REGI

O: 9SEP2023 11:56:50 3.1N 101.0W mb=4.5 EMSC GALAPAGOS TRIPLE JUNCTION REGI

ZEALANDIA AND AUSTRALIA REGION

O: 9SEP2023 15:22:43 44.9S 167.6E ML=3.9 EMSC SOUTH ISLAND OF NEW ZEALAND

P: 8SEP2023 156360 44.0S 168.0E 3.0-4.9 AAAAA So. Island, N.Z.

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

today. GeoNet did not report any felt events in the area.

JAPAN AND KURIL ISLANDS

O: 09SEP2023 09:28:31 29.4N 129.2E mb=4.7 EMSC RYUKYU ISLANDS, JAPAN

O: 10SEP2023 05:28:35 29.3N 129.3E mb=4.8 EMSC RYUKYU ISLANDS, JAPAN

P: 5SEP2023 156160 29.0N 128.0E 4.0-5.6 BAAAA Ryukyu Islands

P: 7SEP2023 156156 29.0N 131.0E 4.0-5.6 BABAA Kyushu Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 9SEP2023 10:55:38 30.5N 116.1W ML=3.3 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

O: 9SEP2023 10:58:37 31.2N 115.8W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

P: 7SEP2023 156204 30.9N 116.2W 2.5-4.4 AAAAA So. California

O: 9SEP2023 21:35:56 32.1N 116.2W ML=2.9 EMSC BAJA CALIFORNIA, MEXICO

P: 6SEP2023 156205 32.4N 115.8W 2.5-4.5 BAAAA So. California

O: 10SEP2023 01:40:44 37.4N 122.5W MD=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 7SEP2023 156175 37.8N 122.6W 2.5-4.4 BAAAA Central California

P: 9SEP2023 156174 37.7N 121.9W 2.5-4.4 AAAAA Central California

O: 10SEP2023 05:01:17 38.5N 119.5W MD=2.0 EMSC CENTRAL CALIFORNIA

P: 9SEP2023 156173 39.3N 120.0W 2.5-4.7 AAAAA California/Nevada area

O: 9SEP2023 07:12:15 41.0N 121.6W MD=2.4 EMSC NORTHERN CALIFORNIA

O: 09SEP2023 14:47:59 41.0N 121.6W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 8SEP2023 156256 40.4N 122.2W 2.5-4.4 AAAAA Northern California

ALASKA

O: 9SEP2023 18:06:00 51.6N 177.8E mb=4.8 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 8SEP2023 156291 51.0N 176.0E 4.0-5.7 AAAAA Rat Islands

O: 9SEP2023 09:45:14 59.9N 153.5W ML=3.2 EMSC SOUTHERN ALASKA

P: 6SEP2023 156301 60.2N 153.2W 3.2-5.2 BAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

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

ROCKY MOUNTAINS REGION

O: 10SEP2023 04:17:24 37.0N 105.0W ML=2.9 EMSC COLORADO

P: 8SEP2023 156179 36.9N 105.1W 2.0-4.0 AAAAA Colorado area

EASTERN U.S./CANADA

O: 10SEP2023 04:11:00 38.6N 88.0W ML=2.5 EMSC ILLINOIS

O: 10SEP2023 04:11:00 38.6N 88.0W ML=2.7 ANSS ILLINOIS

P: 5SEP2023 156190 37.0N 88.0W 2.0-4.1 BBAAA New Madrid area

P: 6SEP2023 156190 38.0N 91.0W 2.0-3.9 BABAA New Madrid area

HAWAII

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

SERIES OF STRONG EARTHQUAKES HITS AROUND THE WORLD

EARTHQUAKE SUMMARY FOR SEPTEMBER 8, 2023

World seismic map looks a bit red today? That is because a series of moderately large to large earthquakes shook up much of the world today. These began with an M 6.2 in Coquimbo, Chile yesterday which was followed today by events of M 6.6 in the Kermadec Islands, New Zealand, M 5.6 in Bali, Indonesia, M 5.5 off eastern Honshu, Japan; M 6.8-6.9 in Morocco, M 5.8 and 5.6 in Jalisco, Mexico.

an M 5.8 in the Central East Pacific Rise; and an M 6.0 in Minahaasa, Suawesi, Indonesia (Sept 9 - see tomorrow's summary for more details). In general the average magnitude of larger earthquakes in the world today was nearly 1.0 magnitude units above the average of the past three months.

These earthquakes followed a period of relative quiet in the world's seismicity documented in previous issues of this summary as likely associated with the strong geomagnetic storm of early September. Among these this summary noted:

"It was a very quiet day in global seismicity today. This occurred as a geomagnetic storm, the first of this intensity in nearly a month began. Storms such as this can disrupt the ring currents in the ionosphere and reduce subsequent induced seismicity. If this is the case, the next several days are also likely to see reduced seismicity as a minor geomagnetic storm is expected September 3 by SWPC. This will probably trigger a moderately long period of reduced seismicity ending around September 6-7 depending on how long this geomagnetic storm lasts. Aurora could be visible at middle latitudes such as the central portion of the U.S. with these storms. Enhanced seismicity is likely to return in the second week of September, 2023." (September 2, 2023)

and

"No earthquakes were reported felt in the world in the past 24 hours according to NEIC data. This is the first time this has occurred in at least 10 years with global AP of 36 and high latitude AP of 58. This occurred while the geomagnetic field was at its most disturbed condition since global AP reached 76 with high latitude AP at 58 on April 24, 2023. Strong disturbance in the geomagnetic field disrupts ring currents and resulting induced telluric currents under them while it is in effect. This can considerably reduce global geomagnetic triggering and larger earthquakes. The influx of particles associated with these storms eventually become incorporated into renewed ring currents and normally produce elevated seismicity several days after such disturbances begin." (September 3, 2023)

A rare earthquake of M 6.9 struck the area of Marrakech, Morocco today.

World press outlets reported at least 2000 were killed in this earthquake -

The strongest in Morocco in recorded history. At least 1832 people were initially reported by Morocco's Interior Ministry to have been injured in the quake among which were 1220 with critical injuries but this number is much higher now. Damage was considerable with many structures destroyed. Most of the deaths and destruction occurred in the province of Al Haouz near the epicenter but deaths were also recorded in Taroudant, Chichaaoua, Marrackesh, Agadir, Casablanca among others. Damage included extensive damage to the 12th sentruy Koutobia Mosque in Marakesh. It occurred near local solar noon and was followed by an M 4.9 19 minutes later. NEIC reported maximum intensity VII in Morocco at Marrakesh, El Kealaa and Taroudannt with VI in Oulad Teima, Quarzazate,, V in Youssoufia, Ben Guerir, Agadir, Essaouria, Ben Guerir, Agadir, Essauira, Safi, Sidi, Tisnit, Fquiah, Settat, Beni, Zagora, Berrechid, Oued Zem with IV in El Jadida, Khouribga, Azemmour, Kasba among other communities. It was also reported felt with light intensity II-III in Algeria, Spain, Portugal. Earthquakes in Morocco or Spain at this magnitude level are rare. The historical record shows no events of M>=6.8 within about 500 km of today's epicenter. The last significant earthquake in the area was an M 5.6 to the east of today's epicenter on October 23 and again on October 30, 1992. An M 6.0 hit near today's epicenter in Morocco on February 29, 1960 - the only event in the historical record which goes back 150 year of M>=6 in Morocco. NEIC reported the M 4.9 aftershocks was felt with maximum intensity VI in Morocco at Guelmim, Tiznit, Taroudannt, Quarzazate, V in Marracech, Agadir, Essaouira, Ben Guerir, and Khouriba among other communities.

The earthquake in Morocco followed an M 6.6 in the Kermadec Islands. These two epicenters are nearly antipodal and the quake in Morocco may have been triggered by antipodal stresses associated with the M 6.4 in the Kermadec Islands. It is also nearly antipodal to the M 7.7 in the Loyalty Islands earlier in the year. It is also likely the area was set up by the full moon of August 31, 2023 which reached fullness when it was near this longitude (note "Western Europe" and presumably northwestern Africa in the tidal forecast) as noted in previous issues of this summary:

"The full moon arrived at 1:35 UT on August 31, 2023. Longitudes which were at local solar midnight at this time are near 25 West and at local solar noon at 155 East. These zones include the central Atlantic and Iceland and western Europe in the west and the Kuril Islands, Japan and portions of eastern Indonesia and the Vanuatu Islands in the east. These areas are the most likely to see tidal triggering in the next week. Such events often occur near local solar midnight and noon. A major earthquake is considered likely with this full moon in the next week." (September 1--5, 2023)

Forecast 156187 had expected enhanced seismicity in the region of Morocco or Spain to the north of today's epicenter was likely around September 5.

O: 8SEP2023 22:30:39 30.7N 9.4W mb=4.8 EMSC MOROCCO

O: 8SEP2023 22:11:00 31.1N 8.5W Mw=6.8 EMSC MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

The M 6.6 in the Kermadec Islands, New Zealand today was widely felt in North Island, New Zealand - unlike most strong earthquakes in the Kermadec Islands. NEIC reported maximum intensity for the M 6.6 at IV in Gisborne at Te Karaka and II-III in the Bay of Plenty at Opotiki, Whakatane, in North Shore, Auckland, Napier, Hawke's Bay, in Manawatu-Wanganui at Palmerston North and Shannon, and more than 1000 km away in Wellington at Porirua, Lower Hutt and Wellington. This is the strongest earthquake in the Kermadec Islands within about 200 km of this epicenter since an M 6.6 on August 14, 2022 and an M 7.4 on June 18, 2020. At the time of the August 14, 2022 event this summary noted:

"The strongest earthquake in the world today was an M 6.4-6.6 in the Kermadec Islands, New Zealand. It may have been felt lightly as far as North Island, New Zealand. This is the second strongest earthquake in the world in the past month following an M 7.0 in Luzon, Philippines on July 27. An M 6.6-6.8 also occurred in the Easter Island region on July 12, 2022 and an M 7.2 hit southern Peru on May 26, 2022, the last such events in the past three months. Today's event of M 6.6 is the strongest earthquake within about 200 km of this epicenter in the southern Kermadec Islands since an M 7.4 on June 18, 2020 and an M 6.9 on September 10, 2018 and an M 6.8 on December 9, 2008." (August 14, 2022)

Like that event today's earthquake also ended a long seismic quiet period. Forecasts 156350 and 156355 had expected this activity within about 100 km in the Kermadec Islands was likely around September 8.

O: 9SEP2023 02:38:47 32.7S 177.7W mb=4.9 EMSC SOUTH OF KERMADEC ISLANDS

O: 8SEP2023 09:09:48 33.0S 178.6W Mw=6.6 EMSC SOUTH OF KERMADEC ISLANDS

P: 8SEP2023 156350 33.0S 177.0W 4.0-5.6 AAAAA No. Kermadec Islands

P: 8SEP2023 156355 32.0S 178.0W 4.0-5.4 AAAAA So. Kermadec Islands

An M 5.5 earthquake occurred off the east coast of Honshu, Japan today. NEIC reported it was felt with intensity II-III in Japan in Miyagi and Aomori Prefectures, Japan. Enhanced seismicity in Honshu and off eastern Honshu, Japan had been expected at this time in this summary due to the passage of Tropical Storm Kirogi through the area at this time. This was emphasized in the September 5, issue of this summary as:

"NEIC reported this earthquake of M 4.9 near Tokyo, Japan was felt with intensity II-III in the area(s) of Honshu, Japan in Chiba, Ibaraki, Tokyo, Saitama, Kanagawa Prefectures. This follows smaller events yesterday which was reported in this summary in the previous issue as:

"... An interesting earthquake of M 4.1 hit off the east coast of Honshu, Japan.

This event occurred near local solar noon and may have been promoted by geomagnetic and tidal stresses which maximize near this hour. Tropical Storm Kirogi passed over this epicenter at the time of the earthquake. Moderately enhanced seismicity in this region of Japan had been expected in this summary in the previous issue as:

"Tropical Storm Kirogi is near Tokyo at this time as reported in this and previous issues of this summary, but also does not appear strong enough to trigger a large earthquake in the region at this time. It is expected to veer off to the east and not to make landfall in Honshu, but may affect regional seismicity moderately. This summary noted this storm as:

"TS Kirogi (11W) continued today in the area of the of the Bonin and Izu Islands, Japan with winds up to 35 kts. It is expected to track to the west and north any may enhance seismicity the Bonin and Izu Islands of southern Japan as it passes through this area." (September 1-2, 2023)

Forecast 156197 had expected today's event within about 50 km was likely around September 3." (September 4, 2023)

The earthquake in Tokyo today had been expected within about 50 km to occur around September 8 in forecast 156197. It is the strongest event within about 100 km of Tokyo, Japan since an M 6.1 on May 26, 2023 and may be an aftershock of that event. Similar events within about 100 km of Tokyo in the past year with M>=4.9 occurred on May 10, 2023 (M 5.2); November 9, 2022 (M 5.0 and September 21. 2022 (M 5.0). Today's event occurred near local solar noon and may have been promoted by tidal stresses which maximize near this hour." (September 5, 2023)

The last earthquake of M>=5.5 in the area off eastern Honshu within about 150 km of today's epicenter occurred on May 1, 2021 with M 6.8 although a series of similar events have hit the region slightly more than 150 km from today's epicenter in recent months - including an M 7.3 on March 16, 2022.

Forecast 156220 had expected today's event within this area was likely

around September 7. This epicenter is at 104 degrees from the M 5.5 in Honshu, Japan and may have been promoted by energy from that source.

O: 8SEP2023 09:28:50 38.9N 142.2E mb=5.5 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 7SEP2023 156220 38.0N 143.0E 4.0-5.5 AAAAA So. of Honshu

An M 5.8 and M 5.6 were also felt in the region of Jalisco, Mexico today. NEIC reported the M 5.8 was felt with damage and intensity VIII in Jalisco at Cihuatlan, and IV in Las Juntas, San Patricio and Autlan with lesser shaking in Colima, Puerto Vallarta, Ixtapa, Bucerias, Nayarit, Tecalitlan and Jocotepec among others. The foreshock of M 5.6 was felt with similar intensities in the same areas of Jalisco, Mexico. These events occurred near local solar noon and may have been promoted by tidal stresses which maximize near this hour. The last earthquake of M>=5.8 in Jalisco within about 200 km of this epicenter occurred on September 20, 2022 also with M 5.8 an on June 30, 2018 with M 5.9-6.0. A major earthquake of M 7.6 hit the area on January 22, 2003 and on October 9, 1995 an M 8.0 occurred east of these epicenters.

Forecast 156127 had expected this activity in Jalisco was likely around September 9.

O: 08SEP2023 15:53:20 19.4N 105.0W Mw=5.6 EMSC JALISCO, MEXICO

O: 8SEP2023 16:37:12 19.4N 105.0W Mw=5.8 EMSC JALISCO, MEXICO

P: 9SEP2023 156127 18.0N 106.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

An M 5.8 south of Jalisco, Mexico also occurred today on the Northern East Pacific Rise. It was not felt in this epicentral area. Both these events are near the strongest Hurricane current active reaching wind speed up to 140 kts yesterday - Hurricane Jova which was described in the previous issue of this summary as:

"Hurricane Jova continued today in the area southwest of the Gulf of California as a category 4 hurricane (major storm) with winds up to 105 kts. It is expected to track to the west and north but not to significantly affect regional seismicity as this time." (September 8, 2023)

Stresses associated with this storm may have helped promote the activity in Jalisco and the East Pacific Rise today. Today's event in the East Pacific Rise is the first of M>=5.8 in that region within about 200 km since an M 5.8 on September 21, 2020 and an M 6.1 on March 22, 2020.

Forecast 156113 had expected today's event within about 100 km was likely around September 6. Like the M 5.5 in Honshu, Japan this epicenter is near 103 degrees from the M 6.8 in Morocco.

O: 9SEP2023 03:09:51 4.7S 105.4W Mw=5.8 EMSC CENTRAL EAST PACIFIC RISE

P: 6SEP2023 156113 5.0S 105.0W 4.0-5.7 BAAAA No. East Pacific Rise

The earthquake of M 5.6 in the Bali Sea, Indonesia today is probably an aftershock of the M 7.1 that rocked that region of August 28. At the time this summary noted in this regard:

"The last earthquake in the Bali Sea within about 250 km of today's events with M>=7.0 occurred more than 35 years years ago. Only three earthquakes in the area of equal of larger magnitude have been historically recorded - an M 7.3 on August 6, 1984; an M 7.2 on August 11, 1937 and an M 7.5 on December 29, 1820. The only major events immediately following these included an M 7.5 in the Manila, Philippines area on August 20, 1937 and an M 5.5 on August 6, 1984 in the Molucca Sea south of the Philippines. Similar regional seismicity may be seen in the next several days." (August 28, 2023)

NEIC reported this earthquake of M 5.6 in the Bali Sea was felt with intensity II-III in the area(s) of Bali with IV in Denpasar, Ubud an Kuta and II in ?Yogyakarta, and Mataram, Indonesia. Forecasts 156117 had expected activity near Bali around September 6 would likely be enhanced.

O: 9SEP2023 00:06:15 6.8S 116.5E Mw=5.6 EMSC BALI SEA

P: 6SEP2023 156117 6.0S 113.0E 4.0-5.7 BACAA So. of Bali

P: 9SEP2023 156122 9.0S 118.0E 4.0-5.4 ACBAA Sumbawa Island area

The largest earthquake in the U.S. or Canada today was an M 5.0 in northern California. NEIC reported it was felt with intensity V in Northern California near Cassel, Burney, Fall River Mills, McArthur, IV in Montgomery Creek, Old Station, Whitmore, Oak Run, McCloud, and with lesser intensity in Southern California and Oregon. An aftershock of M 4.3 was reported with intensity V in McArthur, IV in Redding; III in Milford and I in Santa Rosa, California. This activity occurred near local solar noon and may have been promoted by tidal stresses which maximize near this hour. The last earthquake in Northern California of M>=5 within about 100 km of today's epicenter occurred more than 35 years ago. An M 5.5 and 5.2 occurred about 100 km southeast of today's epicenter on May 11 and 12, 2023. Other regional seismicity at about 100 km from today's epicenter occurred with M 5.7 about 100 km to the southeast on May 24, 2013 and as an M 5.4 on November 26, 1998. Forecast 156256 had expected today's activity within this area around September 8.

O: 08SEP2023 17:24:39 41.0N 121.5W Mw=4.9 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 17:24:39 41.0N 121.5W Mw=5.0 ANSS NORTHERN CALIFORNIA

O: 08SEP2023 17:30:30 41.0N 121.6W MD=2.1 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 17:36:13 41.0N 121.5W MD=2.3 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 17:36:58 41.0N 121.6W MD=2.3 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 17:45:38 41.0N 121.6W MD=2.4 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 17:58:17 41.0N 121.6W MD=2.1 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 18:10:08 41.0N 121.6W MD=2.4 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 18:11:55 41.0N 121.6W MD=2.3 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 18:58:48 41.0N 121.6W MD=2.1 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 20:47:15 41.0N 121.6W MD=2.1 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 22:17:13 41.0N 121.6W MD=2.8 EMSC NORTHERN CALIFORNIA

O: 08SEP2023 22:51:47 41.0N 121.6W MD=2.7 EMSC NORTHERN CALIFORNIA

O: 09SEP2023 01:57:41 41.0N 121.6W MD=2.2 EMSC NORTHERN CALIFORNIA

O: 8SEP2023 17:13:18 39.5N 122.0W MD=2.9 EMSC NORTHERN CALIFORNIA

O: 8SEP2023 18:50:58 40.9N 121.6W MD=2.4 EMSC NORTHERN CALIFORNIA

P: 8SEP2023 156256 40.4N 122.2W 2.5-4.4 AAAAA Northern California

Today's projected seismicity map follows for the coming week.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 8SEP2023 19:33:40 30.4N 94.9E mb=4.8 EMSC EASTERN XIZANG

P: 4SEP2023 156217 32.0N 95.0E 3.5-4.9 BBAAA So. China

O: 8SEP2023 20:55:02 41.1N 83.8E mb=4.6 EMSC SOUTHERN XINJIANG, CHINA

P: 5SEP2023 156244 43.0N 82.0E 4.0-5.4 BBBAA Kirgizstan/Xinjiang

INDONESIA AND PHILIPPINES

O: 8SEP2023 22:50:01 4.3N 126.4E ML=4.1 EMSC KEPULAUAN TALAUD, INDONESIA

P: 3SEP2023 156098 4.0N 127.0E 4.0-5.4 BAAAA Halmahera

O: 08SEP2023 17:26:48 6.0S 130.9E ML=4.2 EMSC BANDA SEA

O: 9SEP2023 03:49:24 6.2S 130.2E mb=4.5 EMSC BANDA SEA

P: 3SEP2023 156105 8.0S 129.0E 4.0-5.4 CBAAA Banda Sea

O: 9SEP2023 00:06:15 6.8S 116.5E Mw=5.6 EMSC BALI SEA

P: 6SEP2023 156117 6.0S 113.0E 4.0-5.7 BACAA So. of Bali

P: 9SEP2023 156122 9.0S 118.0E 4.0-5.4 ACBAA Sumbawa Island area

O: 9SEP2023 05:02:50 7.4S 128.5E mb=4.8 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 5SEP2023 156105 7.0S 127.0E 4.0-5.4 BABAA Banda Sea

O: 8SEP2023 10:54:48 19.1N 145.9E mb=5.2 EMSC MAUG ISLANDS REG, N. MARIANA I

P: 7SEP2023 156142 18.0N 145.0E 4.0-5.6 ABAAA No. Marianas

CENTRAL AND SOUTH AMERICA

O: 8SEP2023 20:45:38 0.7S 77.3W mb=4.9 EMSC ECUADOR

P: 7SEP2023 156108 1.0S 78.0W 4.0-5.6 AAAAA Ecuador

O: 8SEP2023 15:13:03 8.0S 74.6W mb=4.4 EMSC NORTHERN PERU

P: 5SEP2023 156114 8.0S 78.0W 4.0-5.7 BACAA No. Peru

O: 09SEP2023 05:12:22 8.4N 82.9W mb=4.5 EMSC PANAMA-COSTA RICA BORDER REGION

O: 9SEP2023 04:05:56 8.3N 82.9W ML=4.3 EMSC PANAMA-COSTA RICA BORDER REGIO

P: 10SEP2023 156095 7.0N 78.0W 4.0-5.9 ABCAA Colombia

O: 8SEP2023 10:35:37 14.8N 94.5W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 8SEP2023 156126 15.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico

O: 08SEP2023 09:40:09 14.9N 94.5W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 09SEP2023 00:54:15 15.5N 95.0W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 9SEP2023 00:18:55 15.8N 95.7W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

P: 8SEP2023 156126 15.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico

O: 8SEP2023 19:27:51 16.6N 99.9W mb=4.5 EMSC OFFSHORE GUERRERO, MEXICO

P: 7SEP2023 156146 17.0N 100.0W 3.5-5.3 AAAAA Oaxaca, Mexico

NEIC reported this earthquake of M 4.5 in Guerrero, Mexico was felt with intensity II-III in the area(s) of Guerrero, Mexico in Acapulco.

O: 9SEP2023 06:01:04 17.9N 65.7W MD=3.3 EMSC PUERTO RICO REGION

O: 9SEP2023 05:59:43 17.9N 66.9W MD=3.0 EMSC PUERTO RICO REGION

P: 6SEP2023 156147 19.0N 67.0W 3.4-5.1 BBAAA Puerto Rico

O: 8SEP2023 09:43:44 18.2N 68.0W MD=3.4 EMSC MONA PASSAGE, DOMINICAN REPUBL

P: 9SEP2023 156147 18.0N 69.0W 3.4-5.1 AAAAA Puerto Rico

O: 8SEP2023 15:49:14 19.1N 65.8W MD=3.6 EMSC PUERTO RICO REGION

P: 6SEP2023 156133 18.0N 65.0W 3.0-5.1 ABAAA Leeward Islands

O: 9SEP2023 05:21:32 19.2N 71.9W ML=3.4 EMSC DOMINICAN REPUBLIC REGION

P: 9SEP2023 156147 19.0N 71.0W 3.4-5.1 AAAAA Puerto Rico

O: 8SEP2023 16:37:12 19.4N 105.0W Mw=5.8 EMSC JALISCO, MEXICO

P: 9SEP2023 156127 18.0N 106.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

O: 9SEP2023 01:59:14 19.8N 64.4W MD=3.8 EMSC NORTH OF THE VIRGIN ISLANDS

P: 6SEP2023 156133 18.0N 65.0W 3.0-5.1 BBAAA Leeward Islands

O: 8SEP2023 21:04:30 38.6S 69.0W ML=4.0 EMSC NEUQUEN, ARGENTINA

P: 9SEP2023 156346 38.0S 74.0W 4.0-5.9 AACAA Central Chile

O: 08SEP2023 15:53:20 19.4N 105.0W Mw=5.6 EMSC JALISCO, MEXICO

O: 8SEP2023 16:37:12 19.4N 105.0W Mw=5.8 EMSC JALISCO, MEXICO

P: 9SEP2023 156127 18.0N 106.0W 3.5-5.1 ABAAA Coast of Jalisco, Mexico

AFRICA AND EUROPE

O: 8SEP2023 22:30:39 30.7N 9.4W mb=4.8 EMSC MOROCCO

O: 8SEP2023 22:11:00 31.1N 8.5W Mw=6.8 EMSC MOROCCO

P: 5SEP2023 156187 37.0N 10.0W 3.5-5.1 BCAAA Morocco/Spain

O: 8SEP2023 14:36:29 44.4N 13.3E ML=4.0 EMSC ADRIATIC SEA

P: 8SEP2023 156233 45.0N 11.0E 3.0-5.1 AABAA Austria

NEIC reported this earthquake of M 4.0 in Central Italy was felt with intensity II-III in the area(s) of Central Italy in Marken at Senigallia and Ancona.

O: 9SEP2023 03:24:38 63.9N 22.0W ML=3.3 EMSC ICELAND REGION

P: 4SEP2023 156303 63.0N 23.0W 3.0-4.4 BAAAA Iceland area

SOUTHWEST PACIFIC

O: 8SEP2023 16:34:50 19.1S 175.5W mb=5.2 EMSC TONGA

P: 3SEP2023 156325 19.0S 176.0W 4.0-5.4 BAAAA Tonga Islands

O: 09SEP2023 00:45:43 18.9S 168.9E mb=5.0 EMSC VANUATU

P: 6SEP2023 156328 18.0S 168.0E 4.0-5.6 AAAAA Vanuatu Islands

NEIC reported this earthquake of M 5.0 in Vanuatu was felt with intensity II-III in the area(s) of Vanuatu at Vila Shefa.

O: 8SEP2023 14:26:10 26.0S 178.8E mb=4.9 EMSC SOUTH OF FIJI ISLANDS

P: 2SEP2023 156356 32.0S 180.0E 4.0-5.5 CCAAA So. Kermadec Islands

OCEAN RIDGES

O: 9SEP2023 03:09:51 4.7S 105.4W Mw=5.8 EMSC CENTRAL EAST PACIFIC RISE

P: 6SEP2023 156113 5.0S 105.0W 4.0-5.7 BAAAA No. East Pacific Rise

O: 8SEP2023 20:32:00 32.2S 13.8W mb=5.0 EMSC SOUTHERN MID-ATLANTIC RIDGE

O: 8SEP2023 12:41:13 13.2N 50.1E mb=4.4 EMSC GULF OF ADEN

P: 3SEP2023 156130 15.0N 54.0E 3.5-4.9 BBCAA Gulf of Aden

ZEALANDIA AND AUSTRALIA REGION

O: 8SEP2023 23:58:15 32.0S 178.8E Mw=3.6 EMSC KERMADEC ISLANDS REGION

P: 2SEP2023 156356 32.0S 180.0E 4.0-5.5 CAAAA So. Kermadec Islands

O: 9SEP2023 02:38:47 32.7S 177.7W mb=4.9 EMSC SOUTH OF KERMADEC ISLANDS

O: 8SEP2023 09:09:48 33.0S 178.6W Mw=6.6 EMSC SOUTH OF KERMADEC ISLANDS

P: 8SEP2023 156350 33.0S 177.0W 4.0-5.6 AAAAA No. Kermadec Islands

P: 8SEP2023 156355 32.0S 178.0W 4.0-5.4 AAAAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 08SEP2023 22:10:30 25.1N 124.7E ML=4.6 EMSC NORTHEAST OF TAIWAN

O: 8SEP2023 22:09:49 25.1N 124.8E mb=4.8 EMSC NORTHEAST OF TAIWAN

P: 5SEP2023 156164 24.0N 125.0E 4.0-5.6 BBAAA Taiwan

O: 9SEP2023 02:41:30 33.6N 132.0E ML=4.1 EMSC SHIKOKU, JAPAN

P: 9SEP2023 156185 34.0N 132.0E 3.5-5.0 AAAAA Kyushu, Japan area

O: 8SEP2023 09:28:50 38.9N 142.2E mb=5.5 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 7SEP2023 156220 38.0N 143.0E 4.0-5.5 AAAAA So. of Honshu

O: 08SEP2023 17:28:54 29.2N 129.7E Mw=5.1 EMSC RYUKYU ISLANDS, JAPAN

O: 08SEP2023 18:08:17 29.2N 129.5E Mw=5.2 EMSC RYUKYU ISLANDS, JAPAN

O: 08SEP2023 18:23:12 29.2N 129.4E mb=4.4 EMSC RYUKYU ISLANDS, JAPAN

O: 08SEP2023 22:47:02 29.3N 129.3E mb=4.9 EMSC RYUKYU ISLANDS, JAPAN

O: 09SEP2023 02:40:15 29.3N 129.6E mb=4.5 EMSC RYUKYU ISLANDS, JAPAN

O: 09SEP2023 03:03:39 29.4N 129.3E mb=4.6 EMSC RYUKYU ISLANDS, JAPAN

O: 8SEP2023 15:24:01 29.2N 129.5E mb=4.6 EMSC RYUKYU ISLANDS, JAPAN

P: 7SEP2023 156156 29.0N 131.0E 4.0-5.6 AAAAA Kyushu Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 08SEP2023 20:01:16 31.5N 115.6W ML=3.1 EMSC BAJA CALIFORNIA, MEXICO

O: 08SEP2023 20:02:38 31.5N 115.7W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

O: 8SEP2023 09:53:46 31.0N 115.1W ML=3.5 EMSC BAJA CALIFORNIA, MEXICO

P: 7SEP2023 156204 30.9N 116.2W 2.5-4.4 AAAAA So. California

O: 8SEP2023 23:40:27 34.0N 117.0W ML=3.0 EMSC SOUTHERN CALIFORNIA

P: 8SEP2023 156211 34.2N 117.8W 2.5-4.6 AAAAA So. California

NEIC reported this earthquake of M 3.1 in Southern California was felt with intensity II-III in the area(s) of Southern California in Yucaipa, Calimesa, Beaumont, Forest Falls, Banning, Angelus, Redlands among others.

O: 8SEP2023 11:14:35 34.5N 119.0W ML=2.2 EMSC SOUTHERN CALIFORNIA

P: 9SEP2023 156209 33.8N 119.7W 2.5-4.6 AAAAA So. California

O: 8SEP2023 20:02:31 37.9N 118.6W MD=2.2 EMSC CENTRAL CALIFORNIA

P: 9SEP2023 156170 37.5N 118.6W 2.5-4.6 AAAAA California/Nevada area

O: 8SEP2023 17:59:44 38.8N 122.8W MD=2.0 EMSC NORTHERN CALIFORNIA

P: 6SEP2023 156176 38.7N 122.8W 2.5-4.7 AAAAA Central California

O: 8SEP2023 09:26:53 39.1N 123.5W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 9SEP2023 156177 39.7N 123.7W 2.5-4.6 AAAAA Central California

NEIC reported this earthquake of M 2.7 in Northern California was felt with intensity II-III in the area(s) of Northern California in Palo Cedro, Redding and Likely.

O: 8SEP2023 11:55:46 39.2N 120.1W MD=2.1 EMSC NORTHERN CALIFORNIA

P: 9SEP2023 156173 39.3N 120.0W 2.5-4.7 AAAAA California/Nevada area

NEIC reported this earthquake of M 2.8 in Northern California was felt with intensity II-III in the area(s) of Northern California in Burney (IV), Redding and Palo Cedro.