- Earthquake summary

STRONG SERIES IN GULF OF ADEN AND ETHIOPIA WITH SOLAR FLARES

EARTHQUAKE SUMMARY FOR JUNE 3, 2023

The strongest earthquake in the world today was an M 5.9 north of Somalia in the Gulf of Aden. NEIC did not note any felt reports with this earthquake. It was accompanied by a series of smaller aftershocks as well as regional shocks in Ethiopia and the Gulf of Aden. In the previous issue of this summary the foreshocks to this event had been noted as:

"A strong series of earthquakes also continued today in the Gulf of Aden east of

Sudan and Ethiopia. An earthquake of M 5.7 hit this area on May 19, 2023 and this may be aftershocks of that event. Forecast 153672 had expected today's activity was likely in this area around June 2." (June 3, 2023)

Earthquakes in the Gulf of Aden, Eritrea and Ethiopia are closely related to

solar flare activity as they occur on the geomagnetic equator. For example, when an M 5.5 occurred in this area on December 26, 2022 this summary noted in this regard:

"An earthquake of M 5.5 also hit the region of Ethiopia today. It was not immediately reported felt in this remote area. This earthquake may also have been promoted by several moderate solar flares which occurred at or near the time of today's activity. This possibility had been previously noted and expected at this time in past summaries. For example on October 31, 2022 this summary pointed at this possibility as:

"Times of high solar and geomagnetic activity often coincide with renewed seismicity in the region of Ethiopia. Strong flares appear to trigger enhanced seismicity in this area, in particular. So an M 4.4 in the Eritrea and Ethiopia region today is not surprising as it lies on the geomagnetic equator at a time of strong geomagnetic activity. This is the strongest earthquake in Ethiopia within about 200 km of this epicenter since an M 4.6 on June 5, 2022. At the time this summary noted:

"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 seen 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, October 31, 2022, December 26, 2022)

The mainshock today occurred at the maximum of flare 9370 while the strongest aftershock (M 5.5) occurred at the beginning of flare 9470. More details are available in the Solar Flare lists below. Note that another event in Southern Peru today of M 4.7, also on the geomagnetic equator was synchronous with flare 9370.

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

9370 0709 0716 0723 C2.0 (June 3, 2023) 1.5E-03

Gulf of Aden M 5.8 07:17 UT

Gulf of Aden M 4.7 07:05 UT

Southern Peru M 4.7 07:17 UT

9470 1401 1409 1414 C2.2 (June 3, 2023) 1.6E-03

Gulf of Aden M 5.5 13:58 UT

Gulf of Aden M 4.8 14:10 UT

Forecast 153672 had expected enhanced seismicity in the Gulf of Aden was likely around June 2 and forecast 153670 had expected the event in Ethiopia around June 2.

O: 03JUN2023 07:04:26 12.5N 48.2E mb=4.7 EMSC GULF OF ADEN

O: 03JUN2023 10:32:07 12.5N 48.1E mb=4.8 EMSC GULF OF ADEN

O: 03JUN2023 10:53:53 12.5N 48.1E mb=4.4 EMSC GULF OF ADEN

O: 03JUN2023 14:10:36 12.5N 48.1E mb=4.8 EMSC GULF OF ADEN

O: 03JUN2023 07:17:48 12.6N 47.9E Mw=5.8 EMSC GULF OF ADEN

O: 03JUN2023 08:56:04 12.6N 47.9E mb=4.5 EMSC GULF OF ADEN

O: 03JUN2023 10:45:33 12.7N 48.0E mb=4.5 EMSC GULF OF ADEN

O: 03JUN2023 13:58:06 12.7N 48.0E Mw=5.5 EMSC GULF OF ADEN

O: 03JUN2023 09:43:38 13.0N 47.8E mb=4.6 EMSC GULF OF ADEN

O: 3JUN2023 10:15:55 12.4N 48.0E mb=4.8 EMSC GULF OF ADEN

P: 2JUN2023 153672 13.0N 51.0E 3.5-5.1 AACAA Gulf of Aden

O: 4JUN2023 04:14:48 14.5N 40.0E mb=4.7 EMSC ERITREA-ETHIOPIA BORDER REGION

P: 2JUN2023 153670 12.0N 40.0E 3.5-5.0 ACAAA Ethiopia

The strongest earthquake in the U.S. or Canada today was an M 4.5 in the Geysers region of Northern California. NEIC reported it was felt with maximum intensity IV in Kelseyville and Middletown with intensity II-III in Geyserville, Healdsburg, Hidden Valley Lake, Cloverdale, Lower Lake, Calistoga, Windsor and as far to the south as San Francisco, California. This is an area where fluid flow often controls seismicity. Strong tidal stresses can be an effective means to move fluids. So it is not surprising that this earthquake occurred in conjunction with today's full moon as noted in this and previous issues of this summary:

"The full moon will arrive on June 4, 2023 at 03:42 UT. Longitudes at local solar noon are near 126 East and those at local solar midnight are near 55 West longitude. In the west these include the northern and Eastern Caribbean as well as areas of western South America while in the East longitudes near 126 E are located in the Philippines, Taiwan, Japan, and Indonesia among others. These are the most likely areas to see tidal triggering at this time, but other areas could see significant enhancement in seismicity in the next several days. These would most likely see seismic enhancement near local solar noon or midnight. A strong to major earthquake is considered likely with this new moon before May 25, 2023." (June 2-4, 2023)

Today's earthquake is the strongest event in the Geysers area since an M 5.0 on December 14, 2016. That earthquake was likely the strongest recorded in the Geysers region of California as reported at the time in this summary:

"While smaller earthquakes in the Geysers, California are nearly continuous, events of larger magnitude are uncommon. Today's earthquake may be the largest ever recorded in the Geysers area, in fact. An M 5.0 was recorded on May 7, 1955 but magnitudes were not well determined at the time. No other events in the Geysers area have reached M>=5.0 until today." (December 14, 2016)

Like today's event this earthquake in 2016 occurred with the full moon of December 14, 2016 and was probably promoted by tidal stresses.

A similar M 4.4 hit in the Geysers area of Northern California on April 12, 2023. At the time this summary noted in this regard:

"While current seismic conditions remain at very quiet levels, mid-April often sees a rash of increased seismicity. One area where a combination of tidal and geomagnetic/solar effects may produce significant events at this time of year is Central California. The peak of seismicity in this region generally occurs in mid-April and can include moderate to large earthquakes such as the M 8.0 in San Francisco of April 18, 1906. This is a good time to check your emergency kit and rations for the possibility of a significant regional event as the sun becomes active again after a period of quiet over the past several weeks. A further triggering factor may be the solar eclipse of April 20. Tidal effects during solar eclipses have been known to trigger significant seismicity - especially when combined with strong X-class solar flares." (April 9, 2023)

Forecast 153717 had expected today's event was likely within about 10 km of this epicenter around June 5.

O: 03JUN2023 12:02:39 38.8N 122.8W Md=2.9 EMSC NORTHERN CALIFORNIA

O: 03JUN2023 12:07:20 38.8N 122.8W Md=2.5 EMSC NORTHERN CALIFORNIA

O: 03JUN2023 12:10:25 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 3JUN2023 12:01:19 38.8N 122.8W Mw=4.4 EMSC NORTHERN CALIFORNIA

P: 5JUN2023 153717 38.9N 122.8W 2.5-4.6 AAAAA Central California

The strongest seismicity in the U.S. or Canada today was a series including events of M 4.9, 4.9 and 4.7 in the Unimak Island region of the Alaskan Aleutians. These events were not reported felt in this remote area. A foreshock of M 4.6 and 3.8 hit the Unimak Island area on May 5, 2023. At the time this summary noted:

"The strongest earthquake in the U.S. or Canada today was an M 4.6 in Unimak Island area, Alaska. It was not reported felt in this remote area. The last earthquake in the Unimak Island area of Alaska with M>=4.6 occurred on January 21, 2023 with M 4.6, part of a series that stated on January 19 with an M 4.8." (May 5, 2023)

The last earthquake of larger magnitude than M 4.9 in the Unimak area was an M 5.1 on September 9, 2021. Events of M4.9-5.0 also occurred in the area on November 4, 2020 and January 11, 2021. Forecast 153828 had expected this activity was likely in the Unimak Island area around May 31.

O: 03JUN2023 15:24:56 53.5N 163.2W mb=4.9 EMSC UNIMAK ISLAND REGION, ALASKA

O: 03JUN2023 15:37:21 53.5N 163.2W ml=3.6 EMSC UNIMAK ISLAND REGION, ALASKA

O: 03JUN2023 22:49:24 53.6N 163.3W mb=4.7 EMSC UNIMAK ISLAND REGION, ALASKA

O: 04JUN2023 00:54:51 53.6N 163.5W mb=4.9 EMSC UNIMAK ISLAND REGION, ALASKA

O: 3JUN2023 20:42:40 53.4N 163.0W mb=3.9 EMSC SOUTH OF ALASKA

P: 31MAY2023 153828 54.0N 164.9W 3.5-5.1 BAAAA Unimak Islands, Aleutians

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: 4JUN2023 04:51:12 34.1N 46.6E mb=4.5 EMSC WESTERN IRAN

P: 3JUN2023 153734 36.0N 46.0E 3.8-5.6 ABAAA No. Iran

NEIC reported this earthquake of M 4.5 in Western Iran was felt with intensity II-III in the area(s) of Western Iran in Aslamabad, Kermanshah.

O: 3JUN2023 23:15:18 50.0N 88.0E mb=3.8 EMSC SOUTHWESTERN SIBERIA, RUSSIA

P: 31MAY2023 153825 50.0N 88.0E 3.0-4.6 BAAAA So. Siberia

O: 3JUN2023 07:48:45 36.9N 61.6E mb=4.5 EMSC TURKMENISTAN

P: 29MAY2023 153431 33.0N 60.0E 3.8-5.4 BCBAA Afghanistan

O: 3JUN2023 09:23:58 37.6N 56.7E mb=4.4 EMSC NORTHEASTERN IRAN

P: 1JUN2023 153777 40.0N 55.0E 4.0-5.4 ACBAA Kazakhstan

INDONESIA AND PHILIPPINES

O: 3JUN2023 08:51:52 0.6N 96.4E ML=4.5 EMSC NIAS REGION, INDONESIA

P: 2JUN2023 153632 0.0N 97.0E 4.0-5.6 AAAAA Nicobar Islands

O: 4JUN2023 05:52:03 3.0S 137.3E mb=5.0 EMSC PAPUA, INDONESIA

P: 10JUN2023 153658 1.0S 137.0E 4.0-5.4 CBAAA West Irian, PNG

O: 3JUN2023 08:39:51 6.4N 124.7E mb=4.6 EMSC MINDANAO, PHILIPPINES

P: 10JUN2023 153623 7.0N 124.0E 4.0-5.8 CAAAA Central Philippines

NEIC reported this earthquake of M 4.6 in Mindanao, Philippines was felt with intensity II-III in the area(s) of Mindanao, Philippines in Buayan and Talangnan, Central Visayas.

O: 4JUN2023 00:25:10 6.8S 130.4E mb=5.4 EMSC BANDA SEA

O: 03JUN2023 17:06:26 6.4S 130.3E mb=4.6 EMSC BANDA SEA

P: 30MAY2023 153660 6.0S 130.0E 4.0-5.8 BAAAA West Irian, PNG

NEIC reported this earthquake of M 5.2 in the Banda Sea was felt with intensity II-III in the area(s) of Northern Territory, Australia at Darwin.

O: 3JUN2023 12:45:38 7.8S 122.5E ML=4.0 EMSC FLORES SEA

P: 7JUN2023 153640 8.0S 122.0E 4.0-5.6 BAAAA Flores Island area

O: 4JUN2023 03:27:18 8.8N 126.1E ML=4.4 EMSC MINDANAO, PHILIPPINES

P: 30MAY2023 153623 9.0N 126.0E 4.0-5.6 BAAAA Central Philippines

O: 3JUN2023 22:39:44 15.9N 144.9E mb=4.9 EMSC SAIPAN REG., N. MARIANA ISLAND

P: 1JUN2023 153682 18.0N 145.0E 4.0-5.4 ABAAA No. Marianas

O: 3JUN2023 10:57:34 18.3N 145.9E mb=4.6 EMSC PAGAN REG., N. MARIANA ISLANDS

P: 1JUN2023 153682 18.0N 145.0E 4.0-5.4 AAAAA No. Marianas

CENTRAL AND SOUTH AMERICA

O: 3JUN2023 10:14:49 13.2N 83.0W ML=4.1 EMSC CARIBBEAN SEA

P: 2JUN2023 153665 10.0N 84.0W 3.5-5.3 ACAAA Caribbean Sea

O: 3JUN2023 08:37:24 15.0N 94.5W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 8JUN2023 153667 16.0N 94.0W 3.5-5.3 BAAAA Chiapas, Mexico

O: 4JUN2023 01:25:04 15.2S 73.0W mb=4.0 EMSC SOUTHERN PERU

P: 7JUN2023 153852 16.0S 74.0W 4.0-5.7 BAAAA So. Peru/Bolivia

O: 3JUN2023 18:03:26 16.0N 97.6W ML=4.2 EMSC OAXACA, MEXICO

P: 4JUN2023 153685 15.0N 98.0W 3.5-5.3 AAAAA Oaxaca, Mexico

O: 3JUN2023 07:17:43 16.0S 71.9W mb=4.7 EMSC SOUTHERN PERU

P: 6JUN2023 153853 17.0S 72.0W 4.0-5.5 BAAAA So. Peru/Bolivia

NEIC reported this earthquake of M 4.0 in Southern Peru was felt with intensity II-III in the area(s) of Southern Peru in Arequipa at Orcopampa.

O: 4JUN2023 04:39:42 16.3S 74.1W ML=4.0 EMSC NEAR COAST OF SOUTHERN PERU

P: 7JUN2023 153852 16.0S 74.0W 4.0-5.7 BAAAA So. Peru/Bolivia

O: 4JUN2023 06:19:37 18.2N 68.0W Md=3.3 EMSC MONA PASSAGE, DOMINICAN REPUBL

P: 5JUN2023 153687 19.0N 68.0W 3.4-5.3 AAAAA Puerto Rico

O: 3JUN2023 14:12:56 18.3S 71.4W Mw=4.3 EMSC OFF COAST OF TARAPACA, CHILE

P: 6JUN2023 153853 17.0S 72.0W 4.0-5.5 BBAAA So. Peru/Bolivia

O: 3JUN2023 10:08:34 20.8S 68.8W Mw=5.0 EMSC TARAPACA, CHILE

P: 1JUN2023 153870 20.0S 69.0W 4.0-6.1 AAAAA So. Peru/Bolivia

NEIC reported this earthquake of M 5.0 in Tarapaca, northern Chile was felt with intensity II-III in the area(s) of Tarapaca, northern Chile in Iquique and Arica.

O: 4JUN2023 06:05:26 23.6S 67.8W mb=4.7 EMSC ANTOFAGASTA, CHILE

P: 4JUN2023 153861 24.0S 67.0W 4.0-5.6 AAAAA Argentina

O: 3JUN2023 08:21:52 27.0N 111.5W mb=4.1 EMSC GULF OF CALIFORNIA

O: 03JUN2023 08:20:01 27.3N 111.5W ML=3.6 EMSC GULF OF CALIFORNIA

P: 30MAY2023 153694 25.0N 113.0W 3.5-5.0 BBBAA Gulf of California

AFRICA AND EUROPE

O: 4JUN2023 04:14:48 14.5N 40.0E mb=4.7 EMSC ERITREA-ETHIOPIA BORDER REGION

P: 2JUN2023 153670 12.0N 40.0E 3.5-5.0 ACAAA Ethiopia

O: 3JUN2023 22:25:20 38.2N 39.4E ML=4.1 EMSC EASTERN TURKEY

P: 6JUN2023 153759 38.0N 38.0E 3.5-5.1 BAAAA Turkey

O: 3JUN2023 15:07:27 39.4N 37.2E mb=4.1 EMSC CENTRAL TURKEY

P: 6JUN2023 153759 38.0N 38.0E 3.5-5.1 BBAAA Turkey

O: 3JUN2023 10:15:40 45.4N 23.0E ML=2.3 EMSC ROMANIA

P: 5JUN2023 153799 45.0N 22.0E 3.0-5.6 AAAAA Romania/NW Turkey

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

SOUTHWEST PACIFIC

O: 4JUN2023 03:16:57 15.3S 173.3W mb=5.2 EMSC TONGA

P: 2JUN2023 153849 15.0S 175.0W 4.0-5.6 AABAA Samoa Islands

O: 3JUN2023 21:49:33 18.0S 178.5W mb=4.8 EMSC FIJI REGION

P: 30MAY2023 153857 18.0S 178.0W 4.0-5.4 BAAAA Tonga Islands

O: 3JUN2023 23:53:58 25.5S 179.5W mb=4.3 EMSC SOUTH OF FIJI ISLANDS

P: 9JUN2023 153872 25.0S 177.0W 4.0-5.4 CABAA Tonga Islands

O: 3JUN2023 23:01:47 18.4S 168.1E mb=4.7 EMSC VANUATU

P: 6JUN2023 153873 20.0S 169.0E 4.0-5.6 BBAAA Vanuatu Islands

NEIC reported this earthquake of M 4.8 in Vanuatu was felt with intensity II-III in the area(s) of Vanuatu in Vila Shefa.

OCEAN RIDGES

O: 03JUN2023 07:04:26 12.5N 48.2E mb=4.7 EMSC GULF OF ADEN

O: 03JUN2023 10:32:07 12.5N 48.1E mb=4.8 EMSC GULF OF ADEN

O: 03JUN2023 10:53:53 12.5N 48.1E mb=4.4 EMSC GULF OF ADEN

O: 03JUN2023 14:10:36 12.5N 48.1E mb=4.8 EMSC GULF OF ADEN

O: 03JUN2023 07:17:48 12.6N 47.9E Mw=5.8 EMSC GULF OF ADEN

O: 03JUN2023 08:56:04 12.6N 47.9E mb=4.5 EMSC GULF OF ADEN

O: 03JUN2023 10:45:33 12.7N 48.0E mb=4.5 EMSC GULF OF ADEN

O: 03JUN2023 13:58:06 12.7N 48.0E Mw=5.5 EMSC GULF OF ADEN

O: 03JUN2023 09:43:38 13.0N 47.8E mb=4.6 EMSC GULF OF ADEN

O: 3JUN2023 10:15:55 12.4N 48.0E mb=4.8 EMSC GULF OF ADEN

P: 2JUN2023 153672 13.0N 51.0E 3.5-5.1 AACAA Gulf of Aden

O: 4JUN2023 04:14:48 14.5N 40.0E mb=4.7 EMSC ERITREA-ETHIOPIA BORDER REGION

P: 2JUN2023 153670 12.0N 40.0E 3.5-5.0 ACAAA Ethiopia

ZEALANDIA AND AUSTRALIA REGION

O: 4JUN2023 03:20:02 29.3S 179.8E ML=4.3 EMSC KERMADEC ISLANDS REGION

O: 3JUN2023 20:01:19 33.8S 179.2E ML=4.0 EMSC SOUTH OF KERMADEC ISLANDS

O: 3JUN2023 09:39:04 34.6S 178.9E ML=4.2 EMSC SOUTH OF KERMADEC ISLANDS

P: 7JUN2023 153881 32.0S 178.0E 4.0-5.4 BCAAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 4JUN2023 01:46:29 23.0N 143.1E mb=4.7 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 6JUN2023 153707 22.0N 143.0E 4.0-5.6 AAAAA Volcano Islands

O: 4JUN2023 06:50:30 35.6N 140.2E ML=4.0 EMSC NEAR EAST COAST OF HONSHU, JAP

O: 4JUN2023 01:58:33 35.8N 140.1E mb=4.7 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 3JUN2023 153738 35.0N 141.0E 4.0-5.4 AAAAA Off East Coast Honshu

NEIC reported this earthquake of M 4.9 near Tokyo, Honshu, Japan was felt with intensity II-III in the area(s) of Tokyo, Honshu, Japan in Chiba (IV), Saitama, Ibaraki, Tokyo, Kanagawa Prefectures, Japan.

O: 3JUN2023 10:35:41 42.1N 142.5E mb=4.9 EMSC HOKKAIDO, JAPAN REGION

P: 6JUN2023 153773 41.0N 142.0E 3.5-5.4 BBAAA Hokkaido, Japan

P: 30MAY2023 153773 43.0N 143.0E 3.5-5.4 BAAAA Hokkaido, Japan

NEIC reported this earthquake of M 4.8 in Hokkaido, Japan was felt with intensity II-III in the area(s) of Hokkaido, Japan in Noboribetsu, Sapporo and in Misawa, Aomori.

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 3JUN2023 22:26:42 30.4N 114.4W ML=3.7 EMSC GULF OF CALIFORNIA

P: 6JUN2023 153744 31.0N 114.3W 2.5-4.7 BAAAA So. California

O: 03JUN2023 08:04:11 30.8N 116.3W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 3JUN2023 07:49:05 30.8N 116.3W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 4JUN2023 153743 31.9N 116.3W 2.5-4.7 AAAAA So. California

O: 4JUN2023 02:41:57 32.7N 115.8W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 3JUN2023 153746 32.9N 115.6W 2.5-4.6 AAAAA So. California

O: 4JUN2023 04:43:02 33.2N 116.5W ML=3.1 EMSC SOUTHERN CALIFORNIA

P: 5JUN2023 153746 33.0N 115.9W 2.5-4.6 AAAAA So. California

P: 7JUN2023 153747 33.4N 116.7W 2.5-4.8 BAAAA So. California

NEIC reported this earthquake of M 3.2 in Southern California was felt with intensity II-III in the area(s) of Southern California in Santa Ysabel, Warner Springs, Borrego Springs, Julian, Ramona, Pine Valley, Alpine, Lakeside, Escondido among others.

O: 3JUN2023 07:25:00 35.6N 118.3W Ml=2.7 EMSC CENTRAL CALIFORNIA

O: 03JUN2023 08:02:10 35.7N 118.3W Ml=2.4 EMSC CENTRAL CALIFORNIA

O: 3JUN2023 07:08:23 35.7N 118.3W Ml=2.2 EMSC CENTRAL CALIFORNIA

P: 1JUN2023 153751 35.7N 118.1W 2.5-4.9 AAAAA So. California

NEIC reported this earthquake of M 2.7 in Central California was felt with intensity II-III in the area(s) of Central California in Bodfish (V), Lake Isabella and Weldon.

O: 4JUN2023 05:07:34 36.0N 117.8W Ml=2.4 EMSC CENTRAL CALIFORNIA

P: 5JUN2023 153709 36.2N 117.9W 2.5-4.9 AAAAA California/Nevada area

O: 03JUN2023 09:50:49 36.8N 121.3W Md=2.0 EMSC CENTRAL CALIFORNIA

O: 4JUN2023 02:23:09 36.6N 121.2W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 3JUN2023 153716 36.8N 121.3W 2.5-4.4 AAAAA Central California

O: 03JUN2023 07:45:34 39.6N 120.0W ml=2.0 EMSC NEVADA

O: 4JUN2023 00:20:54 39.6N 120.0W ML=2.7 EMSC NEVADA

P: 2JUN2023 153792 40.0N 121.0W 2.5-4.7 AAAAA Northern California

P: 27MAY2023 153438 39.3N 120.0W 2.5-4.5 CAAAA California/Nevada area

NEIC reported this earthquake of M 2.9 in Nevada was felt with intensity II-III in the area(s) of Nevada in Reno.

O: 03JUN2023 12:02:39 38.8N 122.8W Md=2.9 EMSC NORTHERN CALIFORNIA

O: 03JUN2023 12:07:20 38.8N 122.8W Md=2.5 EMSC NORTHERN CALIFORNIA

O: 03JUN2023 12:10:25 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 3JUN2023 12:01:19 38.8N 122.8W Mw=4.4 EMSC NORTHERN CALIFORNIA

P: 5JUN2023 153717 38.9N 122.8W 2.5-4.6 AAAAA Central California

ALASKA

O: 3JUN2023 17:38:32 61.1N 147.4W ML=3.1 EMSC SOUTHERN ALASKA

P: 1JUN2023 153832 60.1N 148.4W 3.2-5.2 AAAAA Central Alaska

O: 3JUN2023 19:41:26 64.9N 151.0W ML=3.0 EMSC CENTRAL ALASKA

P: 29MAY2023 153560 63.3N 151.0W 3.2-4.9 BBAAA Central Alaska

O: 03JUN2023 15:24:56 53.5N 163.2W mb=4.9 EMSC UNIMAK ISLAND REGION, ALASKA

O: 03JUN2023 15:37:21 53.5N 163.2W ml=3.6 EMSC UNIMAK ISLAND REGION, ALASKA

O: 03JUN2023 22:49:24 53.6N 163.3W mb=4.7 EMSC UNIMAK ISLAND REGION, ALASKA

O: 04JUN2023 00:54:51 53.6N 163.5W mb=4.9 EMSC UNIMAK ISLAND REGION, ALASKA

O: 3JUN2023 20:42:40 53.4N 163.0W mb=3.9 EMSC SOUTH OF ALASKA

P: 31MAY2023 153828 54.0N 164.9W 3.5-5.1 BAAAA Unimak Islands, Aleutians

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 3JUN2023 17:24:20 49.4N 120.5W Ml=2.1 EMSC BRITISH COLUMBIA, CANADA

P: 8JUN2023 153804 47.7N 120.3W 2.0-4.1 BBAAA Washington state, U.S.

ROCKY MOUNTAINS REGION

O: 3JUN2023 10:49:40 31.7N 104.1W ML=2.5 EMSC WESTERN TEXAS

P: 4JUN2023 153742 31.4N 103.8W 2.0-3.9 AAAAA SW U.S.A

O: 4JUN2023 01:28:23 44.3N 114.8W Ml=2.2 EMSC SOUTHERN IDAHO

P: 2JUN2023 153781 44.6N 115.0W 2.0-4.1 AAAAA Montana/Idaho

O: 3JUN2023 15:23:56 41.2N 111.3W ML=2.6 EMSC UTAH

P: 7JUN2023 153762 39.8N 112.7W 2.0-4.5 BBBAA Utah area

O: 3JUN2023 07:06:54 41.4N 106.8W ML=3.2 EMSC WYOMING

P: 8JUN2023 153770 40.6N 106.6W 2.0-4.4 BAAAA Colorado area

NEIC reported an aftershock of M 3.2 in Wyoming was felt with intensity II-III in the area(s) of Wyoming in Saratoga.

EASTERN U.S./CANADA

O: 3JUN2023 10:56:48 35.1N 97.6W ML=2.8 EMSC OKLAHOMA

P: 3JUN2023 153757 36.0N 97.0W 2.0-3.9 AAAAA Southeast U.S.

NEIC reported this earthquake of M 2.5 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma in Blanchard, Norman, Purcel, Ponca City and Tulsa.

O: 3JUN2023 16:15:19 36.3N 89.4W mb=2.8 EMSC TENNESSEE

P: 4JUN2023 153730 36.7N 89.7W 2.0-4.1 AAAAA New Madrid area

NEIC reported this earthquake of M 2.8 in Tennessee was felt with intensity II-III in the area(s) of Tennessee in Ridgely, Obion and Jackson.

O: 3JUN2023 17:02:59 37.5N 87.6W Md=2.5 EMSC WESTERN KENTUCKY

P: 26MAY2023 153458 38.0N 89.0W 2.0-4.1 CAAAA New Madrid area

NEIC reported this aftershock of M 2.5 in Western Kentucky was felt with intensity II-III in the area(s) of Western Kentucky in Nebo, Maisonville, Morganfield, Murray, Louisville and in Alma, Illinois.

HAWAII

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

MODERATE QUAKE SHAKES SOUTHERN PERU

EARTHQUAKE SUMMARY FOR JUNE 2, 2023

A moderate earthquake of M 5.5 shook the area of Southern Peru north of Arequipa today. It was strongly felt with intensity VIII in Arequipa at Chivay and IV in Arequipa. An aftershock of M 5.1 was felt with intensity VIII in Lluta, Arequipa, Peru. It was followed by aftershocks of M 5.0 and 5.1. This is the strongest earthquake in Southern Peru within about 150 km of this epicenter since an M 5.5 on July 12, 2022. A major earthquake about 200 km northeast of today's epicenter of M 7.2 occurred in the area a year ago on May 26, 2022. At the time this summary noted:

"Only one other earthquake of equal or larger magnitude has occurred in Southern

Peru within about 300 km of today's epicenter - an M 7.5-7.6 on July 7, 2001." (May 26, 2022)

A strong M 6.0 was also recorded in the area on May 31, 2020.

Forecast 153853 had expected today's events within about 100 km were likely around June 6, 2023. This epicenter is at 103 degrees from the M 7.7 in the Loyalty Islands of May 19 and may have been promoted by energy from that source.

O: 03JUN2023 02:27:39 15.9S 71.9W Mw=5.1 EMSC SOUTHERN PERU

O: 03JUN2023 02:48:12 15.9S 72.0W mb=5.0 EMSC SOUTHERN PERU

O: 3JUN2023 01:49:14 15.7S 71.5W Mw=5.5 EMSC SOUTHERN PERU

P: 6JUN2023 153853 17.0S 72.0W 4.0-5.5 BBAAA So. Peru/Bolivia

A strong series of earthquakes also continued today in the Gulf of Aden east of Sudan and Ethiopia. An earthquake of M 5.7 hit this area on May 19, 2023 and this may be aftershocks of that event. Forecast 153672 had expected today's activity was likely in this area around June 2.

O: 3JUN2023 06:49:04 12.2N 48.2E mb=4.6 EMSC GULF OF ADEN

O: 03JUN2023 06:23:33 12.4N 48.2E Mw=5.0 EMSC GULF OF ADEN

O: 03JUN2023 06:29:04 12.4N 48.4E mb=4.9 EMSC GULF OF ADEN

O: 03JUN2023 06:37:57 12.5N 48.2E mb=4.9 EMSC GULF OF ADEN

P: 2JUN2023 153672 13.0N 51.0E 3.5-5.1 AACAA Gulf of Aden

The strongest earthquake felt in the U.S or Canada today was an M 3.9 in Wyoming. NEIC reported this earthquake of M 3.9 in Southern Wyoming was felt with intensity II-III in the area(s) of Southern Wyoming in Saratoga, Encampment, Laramie, and in Fort Collins, Colorado. NEIC reported an aftershock of M 3.2 in Wyoming was felt with intensity II-III in the area(s) of Wyoming in Saratoga. This is the strongest earthquake within Wyoming within about 150 km of this epicenter since an M 3.9 on October 1, 2005 and an M 4.3 on January 31, 2002. Forecast 153770 had expected this event within about 100 km was likely around June 8, 2023.

O: 2JUN2023 08:14:47 41.4N 106.8W mb=3.9 EMSC WYOMING

P: 8JUN2023 153770 40.6N 106.6W 2.0-4.4 CAAAA Colorado area

An M 4.1 also occurred as an aftershock in the Andreanof Islands, Aleutians, Alaska today. It was not reported felt in this remote area. The mainshock occurred earlier on June 3 and was described in the previous issue of this summary as:

"The last earthquake of significantly larger magnitude in this area of the

Andreanof Islands occurred on March 11, 2023 with M 4.6 and April 12, 2022 with M 4.9. The strongest earthquake in the area in the past 3 years was an M 6.1 on September 24, 2021 and an M 6.1 on January 3, 2021. Today's event may have been promoted by the M 5.7 South of Africa" (June 2, 2023)

Forecast 153809 had expected this event about 150 km southwest of today's epicenter was likely in the Andreanof Islands around June 5.

O: 3JUN2023 04:51:11 52.3N 178.7W mb=4.1 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 5JUN2023 153809 50.6N 179.2W 3.5-5.1 ABAAA Andreanoff Isls, Aleutians

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 2JUN2023 09:48:43 24.2N 122.2E mb=4.2 EMSC TAIWAN REGION

O: 2JUN2023 09:48:43 24.3N 122.1E ML=4.5 TAI Hualien, Taiwan

P: 3JUN2023 153705 24.0N 122.0E 4.0-5.4 AAAAA Taiwan

CWB reported this earthquake was felt with intensity II in Hualien and Yilan and I in Nantou Counties, Taiwan.

O: 2JUN2023 21:25:28 55.4N 163.1E mb=4.2 EMSC OFF EAST COAST OF KAMCHATKA

P: 3JUN2023 153819 56.0N 163.0E 4.0-6.0 AAAAA Komandorsky Isl

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

INDONESIA AND PHILIPPINES

O: 2JUN2023 17:33:10 0.4N 123.1E mb=4.4 EMSC MINAHASA, SULAWESI, INDONESIA

P: 7JUN2023 153620 1.0N 122.0E 4.0-5.4 BAAAA Celebes Sea

O: 2JUN2023 14:16:32 1.9N 99.5E mb=4.9 EMSC NORTHERN SUMATRA, INDONESIA

P: 30MAY2023 153634 3.0N 99.0E 4.0-5.6 ABAAA So. Sumatera

O: 2JUN2023 21:40:14 4.8N 125.5E mb=4.6 EMSC KEPULAUAN SANGIHE, INDONESIA

O: 02JUN2023 21:31:09 4.6N 125.4E ML=4.1 EMSC KEPULAUAN SANGIHE, INDONESIA

P: 9JUN2023 153631 4.0N 126.0E 4.0-5.4 CAAAA Mindanao, Philippines

O: 2JUN2023 10:26:58 5.9S 152.3E mb=4.8 EMSC NEW BRITAIN REGION, P.N.G.

P: 31MAY2023 153644 6.0S 152.0E 4.0-5.4 AAAAA New Britain

O: 02JUN2023 17:40:05 6.2N 121.0E mb=4.6 EMSC SULU ARCHIPELAGO, PHILIPPINES

O: 2JUN2023 15:39:14 6.0N 121.1E ML=4.6 EMSC SULU ARCHIPELAGO, PHILIPPINES

P: 7JUN2023 153620 1.0N 122.0E 4.0-5.4 BCAAA Celebes Sea

O: 2JUN2023 21:57:16 6.5S 127.7E mb=4.5 EMSC BANDA SEA

P: 4JUN2023 153635 7.0S 128.0E 4.0-5.5 AAAAA Banda Sea

O: 2JUN2023 08:50:24 6.8S 129.9E ML=4.2 EMSC BANDA SEA

P: 30MAY2023 153660 6.0S 130.0E 4.0-5.8 AAAAA West Irian, PNG

O: 2JUN2023 16:22:01 12.4N 123.7E ML=4.6 EMSC MASBATE REGION, PHILIPPINES

P: 1JUN2023 153675 12.0N 121.0E 3.5-4.9 AACAA Luzon, Philippines

P: 9JUN2023 153675 13.0N 122.0E 3.5-5.0 CABAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 2JUN2023 15:13:22 12.3N 87.8W mb=4.3 EMSC NEAR COAST OF NICARAGUA

P: 5JUN2023 153681 12.0N 88.0W 3.5-5.1 BAAAA Nicaragua

O: 2JUN2023 20:57:31 13.7N 97.0W ML=4.3 EMSC OFF COAST OF OAXACA, MEXICO

P: 4JUN2023 153685 15.0N 98.0W 3.5-5.3 ABAAA Oaxaca, Mexico

O: 2JUN2023 12:52:29 14.8N 93.2W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 4JUN2023 153666 16.0N 93.0W 3.5-5.3 ABAAA Chiapas, Mexico

P: 8JUN2023 153666 15.0N 93.0W 3.5-5.3 CAAAA Chiapas, Mexico

O: 03JUN2023 02:27:39 15.9S 71.9W Mw=5.1 EMSC SOUTHERN PERU

O: 03JUN2023 02:48:12 15.9S 72.0W mb=5.0 EMSC SOUTHERN PERU

O: 3JUN2023 01:49:14 15.7S 71.5W Mw=5.5 EMSC SOUTHERN PERU

P: 6JUN2023 153853 17.0S 72.0W 4.0-5.5 BBAAA So. Peru/Bolivia

O: 2JUN2023 14:06:40 16.2S 75.6W mb=4.6 EMSC OFF COAST OF SOUTHERN PERU

O: 02JUN2023 16:27:38 16.1S 75.5W ML=4.0 EMSC OFF COAST OF SOUTHERN PERU

P: 28MAY2023 153571 15.0S 76.0W 4.0-5.6 BBAAA Central Peru

P: 7JUN2023 153852 16.0S 74.0W 4.0-5.7 BABAA So. Peru/Bolivia

O: 02JUN2023 10:40:39 17.3N 94.2W ML=4.0 EMSC VERACRUZ, MEXICO

O: 2JUN2023 09:23:23 17.2N 94.5W ML=4.0 EMSC VERACRUZ, MEXICO

O: 02JUN2023 10:40:39 17.3N 94.2W ML=4.0 EMSC VERACRUZ, MEXICO

P: 1JUN2023 153667 17.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 3JUN2023 00:49:52 17.2S 69.7W mb=4.3 EMSC SOUTHERN PERU

P: 8JUN2023 153852 17.0S 69.0W 4.0-5.6 BAAAA So. Peru/Bolivia

O: 2JUN2023 19:54:26 17.9N 67.0W Md=3.0 EMSC PUERTO RICO REGION

P: 1JUN2023 153686 18.0N 67.0W 3.4-5.2 AAAAA Puerto Rico

O: 2JUN2023 11:28:57 18.0N 99.4W ML=4.1 EMSC GUERRERO, MEXICO

P: 1JUN2023 153685 18.0N 99.0W 3.5-5.3 AAAAA Oaxaca, Mexico

O: 2JUN2023 07:52:11 18.9N 65.0W Md=3.3 EMSC VIRGIN ISLANDS REGION

O: 2JUN2023 08:45:07 19.4N 65.7W Md=3.9 EMSC PUERTO RICO REGION

P: 1JUN2023 153674 18.0N 64.0W 3.0-5.5 AABAA Leeward Islands

O: 2JUN2023 17:46:41 19.4N 92.6W ML=4.1 EMSC OFFSHORE TABASCO, MEXICO

P: 4JUN2023 153666 16.0N 93.0W 3.5-5.3 ACAAA Chiapas, Mexico

O: 2JUN2023 18:58:50 23.6S 66.9W ML=4.2 EMSC JUJUY, ARGENTINA

P: 4JUN2023 153861 24.0S 67.0W 4.0-5.6 AAAAA Argentina

NEIC reported this earthquake of M 4.6 in Jujuy, Argentina was felt with intensity II-III in the area(s) of Argentina in Cordoba.

O: 3JUN2023 00:11:48 27.5S 66.5W mb=4.9 EMSC CATAMARCA, ARGENTINA

P: 1JUN2023 153862 27.0S 71.0W 4.0-5.6 AACAA Coast Central Chile

NEIC reported this earthquake of M 4.9 in Catamarca, Argentina was felt with intensity II-III in the area(s) of Tucuman, Argentina.

O: 3JUN2023 10:08 20.7S 68.9W mb=5.0 GUC Tarapaca at Alto Hospicio, Col

P: 1JUN2023 153870 20.0S 69.0W 4.0-6.1 AAAAA So. Peru/Bolivia

AFRICA AND EUROPE

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

SOUTHWEST PACIFIC

O: 2JUN2023 16:00:55 17.8S 178.6W mb=4.6 EMSC FIJI REGION

P: 30MAY2023 153857 18.0S 178.0W 4.0-5.4 AAAAA Tonga Islands

O: 2JUN2023 22:08:23 20.7S 178.1W mb=4.6 EMSC FIJI REGION

P: 28MAY2023 153596 22.0S 179.0W 4.0-5.5 BBAAA Tonga Islands

O: 02JUN2023 13:53:32 18.4S 168.1E mb=4.8 EMSC VANUATU

O: 03JUN2023 01:06:47 18.4S 168.2E mb=4.9 EMSC VANUATU

O: 3JUN2023 01:44:25 18.2S 168.2E mb=5.0 EMSC VANUATU

P: 28MAY2023 153584 19.0S 170.0E 4.0-5.5 BABAA Vanuatu Islands

NEIC reported this earthquake of M 5.0 in Southern Vanuatu was felt with intensity II-III in the area(s) of Southern Vanuatu in Vila Shefa.

O: 2JUN2023 17:39:17 22.8S 176.0W mb=5.1 EMSC TONGA REGION

P: 2JUN2023 153872 21.0S 177.0W 4.0-5.4 ABAAA Tonga Islands

O: 02JUN2023 11:46:33 23.5S 171.3E mb=4.9 EMSC SOUTHEAST OF LOYALTY ISLANDS

O: 2JUN2023 15:53:58 23.3S 171.7E mb=4.9 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 4JUN2023 153864 22.0S 171.0E 4.0-5.5 ABAAA Loyalty Islands

OCEAN RIDGES

O: 3JUN2023 03:47:12 5.8S 11.6W mb=4.6 EMSC ASCENSION ISLAND REGION

P: 4JUN2023 153649 2.0S 13.0W 4.0-5.5 ACBAA No. of Ascension Isl

P: 25MAY2023 153372 5.0S 12.0W 4.0-5.4 CAAAA No. of Ascension Isl

O: 3JUN2023 06:49:04 12.2N 48.2E mb=4.6 EMSC GULF OF ADEN

O: 03JUN2023 06:23:33 12.4N 48.2E Mw=5.0 EMSC GULF OF ADEN

O: 03JUN2023 06:29:04 12.4N 48.4E mb=4.9 EMSC GULF OF ADEN

O: 03JUN2023 06:37:57 12.5N 48.2E mb=4.9 EMSC GULF OF ADEN

P: 2JUN2023 153672 13.0N 51.0E 3.5-5.1 AACAA Gulf of Aden

O: 2JUN2023 15:42:44 60.9S 25.6W Mw=5.3 EMSC SOUTH SANDWICH ISLANDS REGION

P: 5JUN2023 153890 61.0S 26.0W 4.0-5.6 BAAAA Southern Ocean

O: 3JUN2023 05:17:31 75.9N 7.3E mb=4.3 EMSC GREENLAND SEA

P: 1JUN2023 153843 74.0N 14.0E 3.0-4.4 ABAAA Norway

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: 2JUN2023 10:08:26 44.2N 142.0E mb=4.4 EMSC HOKKAIDO, JAPAN REGION

P: 30MAY2023 153773 43.0N 143.0E 3.5-5.4 ABAAA Hokkaido, Japan

O: 2JUN2023 15:13:25 47.1N 152.8E mb=4.4 EMSC KURIL ISLANDS

P: 4JUN2023 153801 46.0N 154.0E 3.5-5.4 ABAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 02JUN2023 17:35:17 30.8N 116.3W ML=3.2 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 02JUN2023 18:54:33 30.9N 115.2W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

O: 2JUN2023 09:35:24 30.7N 116.3W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 4JUN2023 153743 31.9N 116.3W 2.5-4.7 ABAAA So. California

O: 2JUN2023 20:19:46 33.0N 116.3W ML=2.8 EMSC SOUTHERN CALIFORNIA

P: 30MAY2023 153743 32.0N 116.3W 2.5-4.8 AAAAA So. California

NEIC reported this earthquake of M 3.0 in Southern California was felt with intensity II-III in the area(s) of Southern California in Julian, Pine Valley, Santee, Escondido, Sun City and Long Beach.

O: 2JUN2023 11:54:46 35.5N 118.4W ML=2.6 EMSC CENTRAL CALIFORNIA

O: 02JUN2023 11:54:46 35.5N 118.4W ML=2.6 EMSC CENTRAL CALIFORNIA

O: 03JUN2023 06:55:44 35.7N 118.3W Ml=2.6 EMSC CENTRAL CALIFORNIA

P: 1JUN2023 153751 35.7N 118.1W 2.5-4.9 AAAAA So. California

P: 5JUN2023 153751 35.3N 118.6W 2.5-4.9 BAAAA So. California

NEIC reported this earthquake of M 2.6 in Central California was felt with intensity II-III in the area(s) of Central California in Lake Isabella, Bodfish and Weldon.

An earlier M 2.7 was felt with intensity II-III in Lake Isabella and Caliente.

O: 02JUN2023 18:07:29 36.6N 121.3W ML=2.5 EMSC CENTRAL CALIFORNIA

O: 02JUN2023 18:21:11 36.7N 121.3W Md=2.0 EMSC CENTRAL CALIFORNIA

O: 02JUN2023 19:44:18 36.8N 121.5W Md=2.0 EMSC CENTRAL CALIFORNIA

O: 2JUN2023 19:44:18 36.8N 121.5W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 3JUN2023 153716 36.8N 121.3W 2.5-4.4 AAAAA Central California

NEIC reported this earthquake of M 2.6 in Central California was felt with intensity II-III in the area(s) of Central California in Los Banos.

O: 2JUN2023 09:11:53 37.4N 120.0W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 1JUN2023 153711 37.4N 118.6W 2.5-4.7 AABAA California/Nevada area

O: 2JUN2023 15:03:49 37.5N 118.8W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 1JUN2023 153711 37.4N 118.6W 2.5-4.7 AAAAA California/Nevada area

O: 02JUN2023 14:53:34 39.6N 120.0W ml=2.0 EMSC NEVADA

O: 02JUN2023 16:12:05 39.6N 120.0W ml=2.0 EMSC NEVADA

O: 2JUN2023 10:34:20 39.6N 120.0W ml=2.5 EMSC NEVADA

P: 2JUN2023 153768 40.2N 119.6W 2.5-4.4 AAAAA California/Nevada area

P: 27MAY2023 153438 39.3N 120.0W 2.5-4.5 CAAAA California/Nevada area

NEIC reported this earthquake of M 2.5 in Nevada was felt with intensity II-III in the area(s) of Nevada in Reno.

O: 02JUN2023 08:21:51 40.2N 121.1W Md=2.4 EMSC NORTHERN CALIFORNIA

O: 2JUN2023 11:09:28 40.2N 121.2W ML=2.4 EMSC NORTHERN CALIFORNIA

P: 2JUN2023 153792 40.0N 121.0W 2.5-4.7 AAAAA Northern California

ALASKA

O: 2JUN2023 21:44:22 51.5N 177.0W ml=3.7 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 6JUN2023 153810 51.1N 175.8W 3.5-5.0 BAAAA Andreanoff Isls, Aleutians

P: 6JUN2023 153810 51.7N 176.4W 3.5-5.1 BAAAA Andreanoff Isls, Aleutians

O: 3JUN2023 04:51:11 52.3N 178.7W mb=4.1 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 5JUN2023 153809 50.6N 179.2W 3.5-5.1 ABAAA Andreanoff Isls, Aleutians

O: 3JUN2023 00:56:39 54.7N 158.5W ML=3.5 EMSC SOUTH OF ALASKA

P: 3JUN2023 153807 54.8N 158.7W 3.5-5.3 AAAAA Alaska Peninsula

O: 2JUN2023 21:17:37 56.4N 149.3W ML=3.0 EMSC GULF OF ALASKA

P: 3JUN2023 153836 55.0N 149.0W 3.0-4.8 ABAAA Northern Alaska

O: 2JUN2023 11:51:23 59.9N 152.4W ML=3.0 EMSC SOUTHERN ALASKA

P: 3JUN2023 153831 60.0N 153.5W 3.2-5.3 AAAAA 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: 02JUN2023 13:48:10 31.6N 104.1W ML=2.1 EMSC WESTERN TEXAS

O: 02JUN2023 14:45:39 31.6N 104.0W ML=2.3 EMSC WESTERN TEXAS

O: 02JUN2023 09:28:16 31.7N 104.4W ML=2.1 EMSC WESTERN TEXAS

O: 02JUN2023 19:04:03 31.7N 104.4W ML=2.1 EMSC WESTERN TEXAS

O: 02JUN2023 21:51:49 31.7N 104.4W ML=3.6 EMSC WESTERN TEXAS

O: 03JUN2023 00:01:09 31.7N 104.4W ML=3.0 EMSC WESTERN TEXAS

O: 3JUN2023 01:30:59 31.1N 103.3W ML=2.6 EMSC WESTERN TEXAS

P: 4JUN2023 153742 31.4N 103.8W 2.0-3.9 AAAAA SW U.S.A

O: 2JUN2023 08:14:47 41.4N 106.8W mb=3.9 EMSC WYOMING

P: 8JUN2023 153770 40.6N 106.6W 2.0-4.4 CAAAA Colorado area

O: 3JUN2023 00:28:11 37.3N 104.5W ML=3.0 EMSC COLORADO

P: 5JUN2023 153720 36.9N 105.1W 2.0-4.4 AAAAA Colorado area

NEIC reported this earthquake of M 3.0 in Southern Colorado was felt with intensity II-III in the area(s) of Southern Colorado in Trinidad.

EASTERN U.S./CANADA

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

HAWAII

O: 2JUN2023 20:15:30 19.3N 155.2W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

P: 5JUN2023 153673 19.4N 155.1W 3.0-4.9 AAAAA Hawaii

NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Kurtistown, Honomu.

MODERATE EARTHQUAKE IN GUAM TRIGGERED BY TYPHOON MAWAR

EARTHQUAKE SUMMARY FOR JUNE 1, 2023

One of the largest earthquakes in the world today was an M 5.3 in the area of Guam. NEIC did not report it as felt. This earthquake follows the passage of Typhoon Mawar over this epicenter several days ago and probably indicates a causal relationship. This has been previously noted in the relation between Typhoons in Guam in this summary and elsewhere. When Guam was approached by Typhoon Mawar noted in this regard:

"Typhoon Mawar (02W) continued today in the area of Guam with winds up to 165 kts. It is expected to track to the northwest passing over Guam around March 24-25, 2023 as a typhoon with winds up to 165 kts. It is likely that a moderate to strong earthquake could occur near Guam with this storm in the next week. This appears to be the strongest typhoon to hit Guam in the past two decades." (May 25, 2023)

While an M 5.4 hit near this epicenter on May 12, 2023, the last event of significantly larger magnitude in the Guam region was an M 5.7 on August 29, 2022. This was also accompanied by a super-typhoon as noted in this summary at the time:

"The strongest earthquake felt in the world today was an M 5.7 in the area of Guam. NEIC reported it was felt with maximum intensity V in Guam at Barrigada, IV in Dededo, Yigo, Tamuning, Hagatna,Mangilao, Mongmong, Sinajana. An M 4.7 foreshock several hours earlier than the mainshock was not reported in felt in the area. This activity may have been promoted by a super-typhoon which passed north of Guam yesterday and is nearing southern Japan today. The M 5.7 is the strongest earthquake in the region of Guam since an M 5.9 on June 23, 2020 and an M 5.8 on September 23, 2018. Strong activity near Guam is often associated with strong ocean storms." (August 29, 2022)

Forecasts 153688 and 153409 had expected enhanced seismicity in Guam at the end of May or in early July, 2023.

O: 2JUN2023 05:25:37 12.5N 144.8E mb=5.2 EMSC GUAM REGION

O: 2JUN2023 05:25:37 12.5N 144.8E mb=5.3 ANSS GUAM REGION

P: 7JUN2023 153688 12.0N 144.0E 4.0-5.4 BAAAA So. Marianas/Guam

P: 28MAY2023 153409 13.0N 144.0E 4.0-5.4 BAAAA So. Marianas/Guam

NEIC reported an earthquake of M 4.0 in Nevada was felt with intensity II-III in the area(s) of Nevada in Reno (IV) and Sparks and in Loyalton, California. An aftershock of M 3.1 was also felt lightly in Reno, Nevada. This appears to be the strongest earthquake within about 100 km of this epicenter since an M 4.2 on May 28, 2021 and an M 4.7 on May 7, 2021. Today's activity may be related to the M 5.5 in Northern California about 150 km northwest of this which occurred on May 11, 2023 and has seen an M 5.6 off the coast of northern California on May 21 among others. The area has seen enhanced seismicity since that time and further moderate earthquakes appear likely in Northern California in the next several days, possibly related to the events of May 11 and May 21. Forecasts 153768 and 153438 had expected this enhanced seismicity in this area was likely around May 27 to June 2, 2023.

O: 02JUN2023 00:28:07 39.6N 120.0W ML=3.0 EMSC NEVADA

O: 02JUN2023 00:28:07 39.6N 120.0W ML=3.1 ANSS NEVADA

O: 02JUN2023 01:41:34 39.6N 120.0W ml=2.2 EMSC NEVADA

O: 2JUN2023 00:23:05 39.6N 120.0W Mw=3.8 EMSC NEVADA

O: 2JUN2023 00:23:05 39.6N 120.0W Mw=4.0 ANSS NEVADA

P: 2JUN2023 153768 40.2N 119.6W 2.5-4.4 AAAAA California/Nevada area

P: 27MAY2023 153438 39.3N 120.0W 2.5-4.5 BAAAA California/Nevada area

The strongest earthquake in the U.S. or Canada today was an M 4.5 in the Andreanof Islands, Aleutians, Alaska. It was not reported felt in this remote area. The last earthquake of significantly larger magnitude in this area of the

"The earthquake of M 5.7 South of Africa today is near the antipode of the Andreanof Islands, Alaska at 53N 170W. A moderate far-field earthquake in the

Andreanof Islands near the this antipode is likely in the next several days." (May 29, 2023)

Forecast 153809 had expected today's event within about 100 was likely in early

June, 2023.

O: 1JUN2023 11:47:15 51.2N 178.5W mb=4.5 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 5JUN2023 153809 50.6N 179.2W 3.5-5.1 BAAAA Andreanoff Isls, Aleutians

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 1JUN2023 18:12:18 36.5N 70.8E mb=4.4 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 4JUN2023 153725 36.0N 72.0E 3.8-5.2 BAAAA Hindu Kush/Pakistan

O: 1JUN2023 16:00:14 40.9N 79.3E mb=4.3 EMSC SOUTHERN XINJIANG, CHINA

P: 29MAY2023 153463 39.0N 78.0E 3.8-5.3 ABAAA Northern India

O: 1JUN2023 22:15:01 51.1N 157.0E mb=4.3 EMSC NEAR EAST COAST OF KAMCHATKA

P: 7JUN2023 153818 51.0N 156.0E 4.0-5.7 CAAAA Kamchatka

INDONESIA AND PHILIPPINES

O: 1JUN2023 09:50:13 3.6N 127.8E ML=4.1 EMSC KEPULAUAN TALAUD, INDONESIA

P: 31MAY2023 153629 3.0N 129.0E 4.0-5.4 AAAAA Halmahera

O: 1JUN2023 23:47:59 3.8S 101.4E mb=4.3 EMSC SOUTHERN SUMATRA, INDONESIA

P: 1JUN2023 153654 4.0S 103.0E 4.0-5.4 AABAA So. of Sumatera

O: 2JUN2023 01:29:27 4.2S 143.7E ML=4.8 EMSC NEW GUINEA, PAPUA NEW GUINEA

P: 30MAY2023 153651 5.0S 144.0E 4.0-5.4 AAAAA Papua New Guinea

O: 1JUN2023 21:38:56 5.3N 126.0E mb=4.5 EMSC MINDANAO, PHILIPPINES

P: 26MAY2023 153357 5.0N 126.0E 4.0-5.4 CAAAA Mindanao, Philippines

O: 1JUN2023 19:43:43 5.4S 142.7E ML=4.6 EMSC NEW GUINEA, PAPUA NEW GUINEA

P: 30MAY2023 153651 5.0S 144.0E 4.0-5.4 AABAA Papua New Guinea

O: 01JUN2023 20:55:25 5.7S 151.9E mb=4.6 EMSC NEW BRITAIN REGION, P.N.G.

O: 01JUN2023 08:40:43 5.8S 152.4E mb=4.6 EMSC NEW BRITAIN REGION, P.N.G.

O: 01JUN2023 10:00:13 5.8S 152.0E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.

O: 01JUN2023 15:27:27 5.9S 152.1E mb=4.6 EMSC NEW BRITAIN REGION, P.N.G.

O: 1JUN2023 08:49:06 5.7S 152.0E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.

O: 1JUN2023 11:01:01 5.7S 152.1E mb=4.8 EMSC NEW BRITAIN REGION, P.N.G.

P: 31MAY2023 153644 6.0S 152.0E 4.0-5.4 AAAAA New Britain

O: 1JUN2023 21:03:04 6.6S 127.9E ML=4.4 EMSC BANDA SEA

P: 4JUN2023 153635 7.0S 128.0E 4.0-5.5 BAAAA Banda Sea

O: 1JUN2023 23:33:42 7.1S 129.3E mb=4.4 EMSC KEPULAUAN BABAR, INDONESIA

O: 01JUN2023 07:42:30 7.0S 129.5E mb=4.4 EMSC BANDA SEA

P: 1JUN2023 153635 8.0S 129.0E 4.0-5.4 AAAAA Banda Sea

O: 2JUN2023 05:25:37 12.5N 144.8E mb=5.2 EMSC GUAM REGION

O: 2JUN2023 05:25:37 12.5N 144.8E mb=5.3 ANSS GUAM REGION

P: 7JUN2023 153688 12.0N 144.0E 4.0-5.4 BAAAA So. Marianas/Guam

P: 28MAY2023 153409 13.0N 144.0E 4.0-5.4 BAAAA So. Marianas/Guam

O: 1JUN2023 22:51:26 18.3N 146.7E mb=4.6 EMSC PAGAN REG., N. MARIANA ISLANDS

P: 1JUN2023 153682 18.0N 145.0E 4.0-5.4 AABAA No. Marianas

P: 29MAY2023 153403 18.0N 148.0E 4.0-5.4 AAAAA No. Marianas

CENTRAL AND SOUTH AMERICA

O: 1JUN2023 09:13:21 5.7S 77.1W ML=4.4 EMSC NORTHERN PERU

P: 6JUN2023 153648 6.0S 76.0W 4.0-5.7 BAAAA No. Peru

O: 1JUN2023 10:02:09 14.7N 90.6W mb=4.6 EMSC GUATEMALA

P: 30MAY2023 153391 14.0N 91.0W 3.5-5.1 AAAAA Guatemala

O: 02JUN2023 04:03:25 15.0N 94.1W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 01JUN2023 07:53:20 15.7N 94.0W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

O: 2JUN2023 01:26:27 15.7N 94.0W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO

P: 1JUN2023 153667 17.0N 95.0W 3.5-5.1 ABAAA Chiapas, Mexico

O: 1JUN2023 21:05:30 15.9N 97.1W ML=4.1 EMSC OAXACA, MEXICO

P: 2JUN2023 153684 16.0N 96.0W 3.5-5.6 AAAAA Oaxaca, Mexico

O: 1JUN2023 19:34:52 17.6N 98.7W ML=4.0 EMSC GUERRERO, MEXICO

P: 1JUN2023 153685 18.0N 99.0W 3.5-5.3 AAAAA Oaxaca, Mexico

O: 02JUN2023 02:08:10 18.1N 93.7W ML=4.0 EMSC TABASCO, MEXICO

O: 2JUN2023 00:29:34 18.0N 93.6W ML=4.1 EMSC TABASCO, MEXICO

P: 4JUN2023 153666 16.0N 93.0W 3.5-5.3 ABAAA Chiapas, Mexico

O: 1JUN2023 23:54:47 19.2N 107.4W ML=4.0 EMSC OFF COAST OF JALISCO, MEXICO

P: 2JUN2023 153669 19.0N 109.0W 3.5-5.3 AABAA Coast of Jalisco, Mexico

O: 2JUN2023 00:06:00 19.4N 67.1W Md=3.4 EMSC PUERTO RICO REGION

P: 4JUN2023 153691 20.0N 68.0W 3.0-4.6 AAAAA Bahamas/No. Caribbean

O: 2JUN2023 05:43:38 19.7N 65.7W Md=3.8 EMSC PUERTO RICO REGION

P: 4JUN2023 153690 20.0N 64.0W 3.0-4.9 AABAA Bahamas/No. Caribbean

O: 1JUN2023 16:00:50 19.8N 109.2W mb=4.0 EMSC REVILLA GIGEDO ISLANDS REGION

P: 2JUN2023 153669 19.0N 109.0W 3.5-5.3 AAAAA Coast of Jalisco, Mexico

P: 30MAY2023 153415 20.0N 109.0W 3.5-4.9 AAAAA Gulf of California

O: 1JUN2023 22:32:54 23.9S 66.8W ML=4.1 EMSC JUJUY, ARGENTINA

P: 30MAY2023 153586 24.0S 66.0W 4.0-5.8 AAAAA Argentina

O: 1JUN2023 18:29:44 27.8N 111.7W ML=3.6 EMSC GULF OF CALIFORNIA

P: 30MAY2023 153694 25.0N 113.0W 3.5-5.0 ACAAA Gulf of California

AFRICA AND EUROPE

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

SOUTHWEST PACIFIC

O: 1JUN2023 22:52:44 11.6S 166.5E Mw=5.4 EMSC SANTA CRUZ ISLANDS

P: 4JUN2023 153858 11.0S 164.0E 4.0-5.4 BACAA Vanuatu Islands

O: 2JUN2023 04:31:31 23.9S 171.9E Mw=5.0 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 4JUN2023 153864 22.0S 171.0E 4.0-5.5 ABAAA Loyalty Islands

OCEAN RIDGES

O: 2JUN2023 02:24:17 33.4N 17.5W mb=4.2 EMSC MADEIRA ISLANDS, PORTUGAL REGI

O: 2JUN2023 06:30:06 72.5N 4.2E Mw=3.8 EMSC NORWEGIAN SEA

P: 31MAY2023 153843 72.0N 0.0E 3.0-4.6 AAAAA Norway

O: 1JUN2023 15:21:37 74.7N 8.9E Mw=3.5 EMSC GREENLAND SEA

P: 1JUN2023 153843 74.0N 14.0E 3.0-4.4 AAAAA Norway

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

ZEALANDIA AND AUSTRALIA REGION

O: 1JUN2023 18:17:08 33.7S 179.1E ML=4.6 EMSC SOUTH OF KERMADEC ISLANDS

P: 7JUN2023 153881 32.0S 178.0E 4.0-5.4 CBAAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 1JUN2023 13:28:54 29.3N 142.2E mb=4.5 EMSC IZU ISLANDS, JAPAN REGION

P: 1JUN2023 153693 28.0N 142.0E 4.0-5.4 BAAAA Bonin Islands

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 01JUN2023 19:42:00 30.8N 116.3W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 01JUN2023 10:49:30 30.9N 116.2W ML=3.4 EMSC FFSHORE BAJA CALIFORNIA, MEXICO

O: 02JUN2023 06:17:55 30.9N 116.2W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 1JUN2023 08:33:06 30.8N 116.3W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 4JUN2023 153743 31.9N 116.3W 2.5-4.7 BBAAA So. California

O: 2JUN2023 02:52:01 34.3N 117.0W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 3JUN2023 153750 34.3N 117.5W 2.5-4.5 AAAAA So. California

O: 1JUN2023 16:58:11 35.6N 118.3W Ml=2.2 EMSC CENTRAL CALIFORNIA

P: 1JUN2023 153751 35.7N 118.1W 2.5-4.9 AAAAA So. California

O: 1JUN2023 16:31:14 36.5N 120.9W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 5JUN2023 153716 36.4N 121.0W 2.5-4.5 BAAAA Central California

O: 2JUN2023 06:58:02 37.3N 117.6W ml=2.6 EMSC NEVADA

P: 3JUN2023 153710 37.2N 117.3W 2.5-4.7 AAAAA California/Nevada area

O: 1JUN2023 12:07:53 38.8N 122.7W Md=2.0 EMSC NORTHERN CALIFORNIA

P: 5JUN2023 153717 38.9N 122.8W 2.5-4.6 BAAAA Central California

O: 01JUN2023 12:28:03 40.2N 121.1W Md=2.4 EMSC NORTHERN CALIFORNIA

O: 2JUN2023 04:33:19 40.2N 121.2W Md=2.4 EMSC NORTHERN CALIFORNIA

P: 2JUN2023 153792 40.0N 121.0W 2.5-4.7 AAAAA Northern California

O: 1JUN2023 08:57:11 40.5N 124.7W ML=2.8 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 01JUN2023 12:03:36 40.5N 124.4W Md=2.3 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 4JUN2023 153793 40.6N 124.9W 2.5-4.6 BAAAA Off Coast of No. Calif

NEIC reported this earthquake of M 3.0 off the coast of Northern California was felt with intensity II-III in the area(s) of Northern California in Ferndale, Fortuna, Eureka and Arcata.

O: 02JUN2023 00:28:07 39.6N 120.0W ML=3.0 EMSC NEVADA

O: 02JUN2023 01:41:34 39.6N 120.0W ml=2.2 EMSC NEVADA

O: 2JUN2023 00:23:05 39.6N 120.0W Mw=3.8 EMSC NEVADA

P: 2JUN2023 153768 40.2N 119.6W 2.5-4.4 AAAAA California/Nevada area

P: 27MAY2023 153438 39.3N 120.0W 2.5-4.5 BAAAA California/Nevada area

ALASKA

O: 1JUN2023 11:47:15 51.2N 178.5W mb=4.5 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 5JUN2023 153809 50.6N 179.2W 3.5-5.1 BAAAA Andreanoff Isls, Aleutians

O: 1JUN2023 15:29:44 52.7N 163.0W ML=3.1 EMSC SOUTH OF ALASKA

P: 4JUN2023 153828 54.3N 161.4W 3.5-5.0 BBAAA Unimak Islands, Aleutians

O: 1JUN2023 09:41:09 59.5N 151.9W ML=3.1 EMSC KENAI PENINSULA, ALASKA

P: 3JUN2023 153831 60.0N 153.5W 3.2-5.3 AAAAA Central Alaska

O: 2JUN2023 00:04:47 61.2N 152.0W ML=3.0 EMSC SOUTHERN ALASKA

P: 3JUN2023 153833 61.3N 150.9W 3.2-5.1 AAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 2JUN2023 04:37:52 52.9N 132.8W ML=2.9 EMSC QUEEN CHARLOTTE ISLANDS REGION

O: 01JUN2023 20:25:11 53.2N 132.8W ML=2.6 EMSC QUEEN CHARLOTTE ISLANDS REGION

P: 29MAY2023 153538 53.0N 132.0W 3.0-5.1 BAAAA British Colombia

O: 01JUN2023 13:03:19 54.5N 118.5W MB=3.1 ECAN of Grande Prairie, AB

O: 1JUN2023 13:03:19 54.5N 118.5W ML=3.1 EMSC ALBERTA, CANADA

P: 1JUN2023 153808 56.0N 120.0W 2.0-4.2 BAAAA Alberta

O: 1JUN2023 15:03:04 50.5N 130.3W MB=3.7 ECAN of Port Hardy, BC

P: 3JUN2023 153803 49.9N 130.2W 2.8-5.2 AAAAA Vancouver Island area

ROCKY MOUNTAINS REGION

O: 01JUN2023 10:49:45 31.7N 104.4W ML=2.0 EMSC WESTERN TEXAS

O: 2JUN2023 03:28:31 31.7N 104.4W ML=2.1 EMSC WESTERN TEXAS

P: 4JUN2023 153742 31.4N 103.8W 2.0-3.9 AAAAA SW U.S.A

O: 1JUN2023 18:55:44 37.3N 104.5W ML=3.4 EMSC COLORADO

P: 5JUN2023 153720 36.9N 105.1W 2.0-4.4 BAAAA Colorado area

NEIC reported this earthquake of M 3.4 in Southern Colorado was felt with intensity II-III in the area(s) of Southern Colorado in Trinidad.

O: 1JUN2023 18:46:14 44.8N 110.4W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, WYOMING

P: 30MAY2023 153805 44.6N 110.8W 2.0-3.9 AAAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 02JUN2023 02:15:37 36.3N 97.7W mb=2.6 EMSC OKLAHOMA

O: 1JUN2023 07:05:26 35.1N 97.6W ML=2.2 EMSC OKLAHOMA

P: 3JUN2023 153757 36.0N 97.0W 2.0-3.9 AAAAA Southeast U.S.

O: 1JUN2023 07:35:12 46.8N 79.2W MB=1.9 ECAN of T├⌐miscaming, QC

P: 28MAY2023 153520 49.0N 81.0W 2.0-4.1 BCBAA Ohio/Lake Erie

HAWAII

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

MODERATELY STRONG QUAKE IN MYANMAR

EARTHQUAKE SUMMARY FOR MAY 31, 2023

The strongest earthquake in the world today was an M 5.8 in Myanmar. NEIC reported it was felt with intensity V in Myanmar at Katha Sagaing and III in Mandalay with II in Dulia Gaon, Assam, India. This is the strongest earthquake in Myanmar within about 200 km of this epicenter since an M 5.8 on May 23 and an M 5.9 nine years ago on May 30, 2014.

Forecast 153420 had expected this event within Myanmar within about 100 km was likely around May 26, 2023. A strong tropical storm passed over this epicenter in May, 2023 and may have helped set this earthquake up. In the previous issue of this summary this had been alluded to as:

"Another recent typhoon landfall has occurred in the Bay of Bengal in the area of India and Myanmar. This Tropical Cyclone was described in past issues of this summary as:

"TC Mocha (01B) formed today in the area south of Myanmar and Bangladesh in the Gulf of Bengal with winds up to 130 kts. It is expected to continue north and to make landfall in the next two days in India, Bangladesh and Myanmar. Considerable damage is expected with winds up to 130 kts. Seismicity in Southeast Asia is likely to be enhanced while this storm is active." (May 15-16, 2023)

It is possible this area of Assam, India and Myanmar could still see a weather-related moderate event in the next several days. A series of moderate events have occurred in Assam, India in the past week perhaps indicating a larger event is possible." (May 30, 2023)

O: 31MAY2023 11:20:16 25.1N 96.2E Mw=5.8 EMSC MYANMAR

P: 26MAY2023 153420 25.0N 95.0E 4.0-5.4 BAAAA Myanmar

An M 5.5 was also lightly felt in Kamchatka today. This continues a series of moderate quakes in Kamchatka that began in early to mid-April, 2023 with an M 6.7 on April 3 and an M 5.6 on April 18 but is to the northeast of those epicenters by about 400 km. The only earthquake within about 250 km of today's epicenter with equal or greater magnitude was an M 6.6 about 100 km south of this on March 16, 2021. Forecast 153542 had expected today's event within about 50 km was likely around May 27.

O: 31MAY2023 14:01:46 55.4N 163.2E Mw=5.5 EMSC OFF EAST COAST OF KAMCHATKA

P: 27MAY2023 153542 55.0N 163.0E 4.0-5.7 BAAAA Komandorsky Isl

An earthquake of M 3.9 occurred today off the coast of Northern California. NEIC reported it was felt with intensity II in Fortuna, Eureka and Arcata, California. This appears to be an aftershock of the M 5.6 off northern California of May 21, 2023. At the time this summary noted in this regard:

"The strongest earthquake in the U.S. or Canada today was an M 5.6 off the coast of Northern California. NEIC reported it was felt with maximum intensity VI in California at Petrolia and II-III in Ferndale, Loleta, Rio Del, Fortuna, Samoa, Hydesville, Eureka, Scotia, and as far as the coast of Oregon and Central California. This is near the antipode of the M 6.8 in the Prince Edward Islands which occurred several hours earlier in the day. Triggering associated with that event possible. This event is near the fourth node (90 degrees) from the major activity in the Loyalty Islands of the past three days and continues a regional activation of seismicity in California associated with the Loyalty Islands near the fourth node" (May 21, 2023)

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

Forecasts 153518 had expected today's event was likely within about 25 km around

May 29.

O: 01JUN2023 00:25:27 40.5N 124.9W Md=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 31MAY2023 19:59:39 40.4N 125.6W Mw=3.9 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 29MAY2023 153518 40.5N 125.8W 2.5-4.4 AAAAA Off Coast of No. Calif

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 1JUN2023 00:44:38 36.8N 71.5E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 4JUN2023 153725 36.0N 72.0E 3.8-5.2 BAAAA Hindu Kush/Pakistan

O: 31MAY2023 07:12:48 40.3N 77.3E mb=4.3 EMSC SOUTHERN XINJIANG, CHINA

P: 29MAY2023 153463 39.0N 78.0E 3.8-5.3 ABAAA Northern India

O: 1JUN2023 03:21:14 41.8N 71.8E mb=4.8 EMSC KYRGYZSTAN

P: 2JUN2023 153778 41.0N 73.0E 4.0-5.4 AAAAA Kirgizstan/Xinjiang

O: 1JUN2023 06:06:35 47.4N 93.2E mb=4.0 EMSC WESTERN MONGOLIA

P: 31MAY2023 153825 50.0N 88.0E 3.0-4.6 ACCAA So. Siberia

O: 31MAY2023 14:01:46 55.4N 163.2E Mw=5.5 EMSC OFF EAST COAST OF KAMCHATKA

P: 27MAY2023 153542 55.0N 163.0E 4.0-5.7 BAAAA Komandorsky Isl

O: 31MAY2023 11:20:16 25.1N 96.2E Mw=5.8 EMSC MYANMAR

P: 26MAY2023 153420 25.0N 95.0E 4.0-5.4 BAAAA Myanmar

INDONESIA AND PHILIPPINES

O: 31MAY2023 21:56:38 3.6S 128.3E Mw=5.2 EMSC SERAM, INDONESIA

P: 25MAY2023 153364 3.0S 129.0E 4.0-5.4 CAAAA Ceram area

O: 01JUN2023 03:51:10 5.8S 152.0E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.

O: 1JUN2023 00:05:16 5.8S 152.0E mb=5.3 EMSC NEW BRITAIN REGION, P.N.G.

P: 31MAY2023 153644 6.0S 152.0E 4.0-5.4 AAAAA New Britain

O: 31MAY2023 13:00:40 10.8S 113.2E ML=4.1 EMSC SOUTH OF JAVA, INDONESIA

P: 1JUN2023 153854 11.0S 115.0E 4.0-5.4 AABAA So. of Indonesia

CENTRAL AND SOUTH AMERICA

O: 31MAY2023 10:55:18 1.5N 90.6W mb=5.0 EMSC GALAPAGOS ISLANDS REGION

P: 31MAY2023 153628 1.0N 91.0W 3.5-5.1 AAAAA Galapagos Islands

O: 1JUN2023 04:03:29 8.3S 74.3W ML=4.2 EMSC CENTRAL PERU

P: 27MAY2023 153362 9.0S 75.0W 3.5-5.1 BAAAA Brazil

O: 1JUN2023 05:27:22 9.1S 79.3W ML=4.0 EMSC OFF COAST OF NORTHERN PERU

P: 2JUN2023 153648 8.0S 78.0W 4.0-5.7 ABAAA No. Peru

O: 1JUN2023 04:14:31 10.7S 77.1W ML=4.1 EMSC NEAR COAST OF CENTRAL PERU

P: 29MAY2023 153570 11.0S 74.0W 4.0-5.5 AACAA Central Peru

O: 31MAY2023 22:52:40 15.8N 93.9W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

O: 31MAY2023 14:42:44 16.6N 94.2W ML=4.0 EMSC OAXACA, MEXICO

O: 31MAY2023 09:26:29 14.2N 94.0W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 30MAY2023 153405 15.0N 96.0W 3.5-5.6 AABAA Oaxaca, Mexico

O: 31MAY2023 20:23:50 14.9N 60.5W ML=3.6 EMSC MARTINIQUE REGION, WINDWARD IS

P: 29MAY2023 153394 15.0N 60.0W 3.0-5.1 AAAAA Leeward Islands

O: 31MAY2023 08:30:28 15.3N 95.6W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 2JUN2023 153684 16.0N 96.0W 3.5-5.6 AAAAA Oaxaca, Mexico

O: 31MAY2023 18:30:21 15.7N 92.6W ML=4.1 EMSC CHIAPAS, MEXICO

P: 4JUN2023 153666 16.0N 93.0W 3.5-5.3 BAAAA Chiapas, Mexico

O: 1JUN2023 00:15:17 15.8N 93.9W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO

P: 4JUN2023 153666 16.0N 93.0W 3.5-5.3 BAAAA Chiapas, Mexico

O: 31MAY2023 09:04:21 17.0N 99.8W ML=4.0 EMSC GUERRERO, MEXICO

O: 31MAY2023 21:18:22 16.9N 100.1W ML=4.2 EMSC OFFSHORE GUERRERO, MEXICO

P: 1JUN2023 153685 18.0N 99.0W 3.5-5.3 ABAAA Oaxaca, Mexico

O: 31MAY2023 15:04:35 17.7N 103.5W ML=4.1 EMSC OFFSHORE MICHOACAN, MEXICO

P: 27MAY2023 153399 18.0N 103.0W 3.5-5.3 BAAAA Michoacan, Mexico

O: 31MAY2023 14:22:09 18.2N 68.6W Md=3.9 EMSC MONA PASSAGE, DOMINICAN REPUBL

P: 28MAY2023 153407 18.0N 68.0W 3.4-5.4 BAAAA Puerto Rico

P: 30MAY2023 153691 20.0N 69.0W 3.0-4.4 ABAAA Bahamas/No. Caribbean

O: 31MAY2023 09:05:49 19.7N 65.7W Md=4.0 EMSC PUERTO RICO REGION

O: 1JUN2023 02:33:32 19.6N 65.7W Md=4.0 EMSC PUERTO RICO REGION

P: 1JUN2023 153674 18.0N 64.0W 3.0-5.5 AABAA Leeward Islands

AFRICA AND EUROPE

O: 31MAY2023 10:10:11 45.8N 26.8E ML=3.4 EMSC ROMANIA

P: 26MAY2023 153526 46.0N 27.0E 3.0-5.1 BAAAA Romania/NW Turkey

O: 31MAY2023 18:37:15 78.4N 7.1E Mw=3.4 EMSC SVALBARD REGION

O: 31MAY2023 07:34:23 78.4N 7.5E Mw=3.6 EMSC SVALBARD REGION

P: 5JUN2023 153843 79.0N 7.0E 4.0-5.5 BAAAA Arctic Ocean Region

SOUTHWEST PACIFIC

O: 31MAY2023 12:29:11 9.8S 166.9E mb=4.9 EMSC SANTA CRUZ ISLANDS

P: 4JUN2023 153858 11.0S 164.0E 4.0-5.4 BBCAA Vanuatu Islands

O: 31MAY2023 09:27:58 25.2S 179.7W mb=4.5 EMSC SOUTH OF FIJI ISLANDS

P: 25MAY2023 153598 25.0S 179.0W 4.0-5.6 CAAAA Tonga Islands

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

OCEAN RIDGES

O: 31MAY2023 10:55:18 1.5N 90.6W mb=5.0 EMSC GALAPAGOS ISLANDS REGION

P: 31MAY2023 153628 1.0N 91.0W 3.5-5.1 AAAAA Galapagos Islands

O: 31MAY2023 08:11:15 56.7S 26.1W mb=4.9 EMSC SOUTH SANDWICH ISLANDS REGION

P: 30MAY2023 153617 56.0S 28.0W 4.0-5.8 AAAAA So. Sandwich Islands

O: 31MAY2023 18:37:15 78.4N 7.1E Mw=3.4 EMSC SVALBARD REGION

O: 31MAY2023 07:34:23 78.4N 7.5E Mw=3.6 EMSC SVALBARD REGION

P: 5JUN2023 153843 79.0N 7.0E 4.0-5.5 BAAAA Arctic Ocean Region

ZEALANDIA AND AUSTRALIA REGION

O: 31MAY2023 07:42:32 29.2S 179.2E ML=4.5 EMSC KERMADEC ISLANDS REGION

O: 31MAY2023 09:29:18 32.2S 178.0E ML=4.2 EMSC SOUTH OF KERMADEC ISLANDS

P: 7JUN2023 153881 32.0S 178.0E 4.0-5.4 CAAAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 1JUN2023 02:28:30 29.9N 130.0E ML=4.4 EMSC RYUKYU ISLANDS, JAPAN

P: 1JUN2023 153727 30.0N 129.0E 3.5-4.9 AAAAA Kyushu, Japan area

P: 30MAY2023 153418 29.0N 131.0E 4.0-5.4 AAAAA Kyushu Japan

O: 31MAY2023 15:03:30 37.5N 137.4E ML=4.2 EMSC NEAR WEST COAST OF HONSHU, JAP

P: 31MAY2023 153733 37.0N 139.0E 3.5-4.9 AAAAA No. Honshu, Japan

O: 31MAY2023 15:03:30 38.7N 142.3E ML=4.4 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 28MAY2023 153465 38.0N 141.0E 4.0-5.4 BAAAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 31MAY2023 20:54:25 30.8N 116.3W ML=3.1 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 31MAY2023 18:54:22 30.9N 116.2W ML=3.5 EMSC BAJA CALIFORNIA, MEXICO

O: 31MAY2023 20:35:45 30.9N 116.1W ML=3.8 EMSC BAJA CALIFORNIA, MEXICO

O: 31MAY2023 20:28:44 30.8N 116.3W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 31MAY2023 21:12:20 31.7N 116.3W ML=2.9 EMSC BAJA CALIFORNIA, MEXICO

P: 30MAY2023 153743 32.0N 116.3W 2.5-4.8 AAAAA So. California

O: 31MAY2023 14:56:04 32.2N 115.2W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 30MAY2023 153743 32.0N 116.3W 2.5-4.8 AAAAA So. California

O: 31MAY2023 07:42:26 33.2N 115.8W Ml=2.1 EMSC SOUTHERN CALIFORNIA

P: 3JUN2023 153746 32.9N 115.6W 2.5-4.6 AAAAA So. California

O: 31MAY2023 09:25:35 33.8N 118.2W Ml=2.2 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 01JUN2023 02:15:55 33.9N 118.2W ML=2.8 EMSC GREATER LOS ANGELES AREA, CALIF.

O: 31MAY2023 08:54:04 33.8N 118.2W Ml=2.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 1JUN2023 153749 34.0N 118.7W 2.5-4.6 AAAAA So. California

NEIC reported this earthquake of M 2.5 in Long Beach, California was felt with intensity II-III in the area(s) of Long Beach, California in Signal Hill, Lakewood and Long Beach.

O: 31MAY2023 23:27:27 34.0N 116.6W Ml=2.4 EMSC SOUTHERN CALIFORNIA

O: 31MAY2023 15:07:26 33.9N 116.9W Ml=2.1 EMSC SOUTHERN CALIFORNIA

P: 29MAY2023 153475 33.7N 117.5W 2.5-4.8 AAAAA So. California

O: 31MAY2023 23:38:46 36.3N 115.3W ml=2.1 EMSC LAS VEGAS URBAN AREA, NEVADA

P: 5JUN2023 153712 37.8N 115.8W 2.5-4.9 BBAAA California/Nevada area

O: 31MAY2023 07:44:11 36.4N 117.9W ML=2.1 EMSC CENTRAL CALIFORNIA

P: 1JUN2023 153709 36.1N 118.1W 2.5-4.9 AAAAA California/Nevada area

O: 31MAY2023 23:21:37 37.5N 121.3W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 26MAY2023 153442 37.8N 122.6W 2.5-4.4 BAAAA Central California

O: 31MAY2023 14:05:51 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 31MAY2023 153717 38.9N 122.8W 2.5-4.6 AAAAA Central California

O: 31MAY2023 10:31:36 40.4N 123.8W Md=2.0 EMSC NORTHERN CALIFORNIA

P: 4JUN2023 153792 40.6N 122.4W 2.5-4.8 BAAAA Northern California

O: 01JUN2023 00:25:27 40.5N 124.9W Md=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 31MAY2023 19:59:39 40.4N 125.6W Mw=3.9 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 29MAY2023 153518 40.5N 125.8W 2.5-4.4 AAAAA Off Coast of No. Calif

ALASKA

O: 31MAY2023 08:27:22 50.8N 176.9E ML=3.0 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 3JUN2023 153823 51.0N 177.0E 4.0-5.8 BAAAA Rat Islands

P: 30MAY2023 153548 52.0N 176.0E 4.0-5.8 ABAAA Rat Islands

O: 31MAY2023 12:24:23 54.3N 159.7W mb=3.7 EMSC SOUTH OF ALASKA

P: 3JUN2023 153807 54.8N 158.7W 3.5-5.3 BAAAA Alaska Peninsula

O: 1JUN2023 06:20:30 67.4N 163.8W mb=3.5 EMSC NORTHERN ALASKA

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 31MAY2023 18:11:49 65.0N 134.0W MB=3.9 ECAN of Keno, YT

O: 31MAY2023 18:11:49 65.0N 134.0W ML=3.9 EMSC NORTHERN YUKON TERRITORY, CANA

P: 5JUN2023 153839 64.0N 133.0W 2.5-4.2 BAAAA Yukon Territory, Canada

ROCKY MOUNTAINS REGION

O: 31MAY2023 08:46:40 31.6N 104.3W ML=2.1 EMSC WESTERN TEXAS

O: 31MAY2023 14:45:25 31.7N 104.3W ML=2.1 EMSC WESTERN TEXAS

O: 31MAY2023 15:53:23 31.7N 104.3W ML=2.1 EMSC WESTERN TEXAS

O: 31MAY2023 08:27:53 31.6N 104.2W ML=2.1 EMSC WESTERN TEXAS

P: 4JUN2023 153742 31.4N 103.8W 2.0-3.9 AAAAA SW U.S.A

O: 31MAY2023 14:10:41 32.8N 100.7W mb=3.0 EMSC WESTERN TEXAS

O: 31MAY2023 10:07:55 32.8N 100.7W ML=2.0 EMSC WESTERN TEXAS

P: 5JUN2023 153742 35.4N 101.8W 2.0-3.9 BCAAA SW U.S.A

O: 31MAY2023 07:29:02 44.8N 110.4W Ml=2.3 EMSC YELLOWSTONE NAT. PARK, WYOMING

P: 30MAY2023 153805 44.6N 110.8W 2.0-3.9 AAAAA Yellowstone/Wyoming

O: 31MAY2023 19:05:21 46.0N 112.5W Ml=2.0 EMSC WESTERN MONTANA

P: 3JUN2023 153781 44.9N 113.4W 2.0-3.9 BBAAA Montana/Idaho

EASTERN U.S./CANADA

O: 31MAY2023 10:04:37 43.4N 71.8W mb=2.2 EMSC NEW HAMPSHIRE

O: 31MAY2023 10:04:38 43.4N 71.8W MB=2.5 ECAN of Concord, NH

P: 1JUN2023 153786 45.0N 73.0W 2.0-4.6 ABAAA New England

O: 1JUN2023 01:08:28 46.6N 75.6W MB=1.9 ECAN of Mont-Laurier, QC

P: 30MAY2023 153789 46.0N 74.0W 2.0-4.3 AAAAA New York State

HAWAII

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

STRONG QUAKE SOUTH OF NEW ZEALAND IN SNARES ISLAND

EARTHQUAKE SUMMARY FOR MAY 30, 2023

The largest earthquake in the world today was an M 6.1-6.2 in Auckland, New Zealand. NEIC reported it was lightly felt with intensity II in New Zealand in Southland at Riverton, Invercargill and Gore. GEONET reported this earthquake in Snares Island, New Zealand was felt by 1 with 1 reporting weak intensity and 0 light intensity. This earthquake occurred new local solar noon and may have been promoted by tidal stresses which maximize near this hour. The last earthquake in the Snares Island within about 200 km of today's epicenter with larger or equal magnitude occurred on July 11, 2017 with M 6.6. At the time this summary noted in this regard:

"The last earthquake with M>=6.5 in the region occurred on September 30, 2007 with an M 7.4 and 6.6 ten years ago. A great earthquake hit the region December 23, 2004, two days before the great tsunamigenic Sumatra earthquake which caused more than 200,000 deaths around the Indian Ocean." (July 11, 2017) ...

Forecast 153885 had expected this event in this region was likely around June 1, 2023. This epicenter is located near 144 degrees from the M 7.7 in Turkey of February 6, 2023 at 104 degrees from the M 6.7 in Ecuador of March 18 and may have been promoted by energy from those sources.

O: 31MAY2023 02:21:19 49.9S 163.9E ML=6.1 GEONET Snares Island, New Zealand

O: 31MAY2023 02:21:21 49.6S 163.9E Mw=6.2 EMSC AUCKLAND ISLANDS, N.Z. REGION

O: 31MAY2023 02:21:21 49.6S 163.9E Mw=6.2 ANSS AUCKLAND ISLANDS, N.Z. REGION

P: 1JUN2023 153885 47.0S 164.0E 3.0-5.0 ACAAA So. Island, N.Z.

A moderate earthquake was also felt in northern Chile today. NEIC reported this earthquake of M 5.5 in Northern Chile was felt with intensity II-III in the area(s) of Northern Chile in Iquique with V, and in Arica and in Tocopilla, Antofagasta. The last earthquake in Tarapaca, Chile with M>=5.4 within about 200 km of today's epicenter occurred as an M 6.1 on December 6, 2020, the only such event in this area in at least three years. Today's event occurred within minutes of local solar noon and was probably promoted by tidal stresses which maximize near this hour. The M 6.1 on December 6, 2020 shared this timing occurring at 16:48 UT at solar noon as noted in this summary on that date:

"The strongest earthquake in the world today was an M 6.1 in northern Chile. It was reported with maximum intensity VI in Iquique, Tarapaca and V in Tocopilla, Antofagasta and IV in Calama and Arica, Antofagasta and Arequipa. ... This continues strong activity in the region over the past week. The last earthquakes in northern Chile of M>=6.1 occurred on September 11, 2020 and prior to that on November 1, 2018. A major event of M 7.6 hit the area on April 3, 2014 after an M 8.2 to the north on April 1, 2014. Today's event is about 150 km east of those epicenters. This event occurred within several minutes of local solar noon and was probably promoted by high tidal stresses which maximize at this hour." (December 7, 2020)

Forecasts 153870, 153588 and 153863 had expected today's event within about

100 km was likely at the end of May or in early June, 2023. This epicenter is at 144 degrees from the M 7.2 in Tajikistan of February 23, and at 105 degrees from the M 7.7 in the Loyalty Islands of May 19, 2023 and may have been promoted by energy from those sources.

O: 30MAY2023 16:51 20.7S 70.6W mb=5.4 GUC Tarapaca at Alto Hospicio and

O: 30MAY2023 16:51:37 20.7S 70.5W Mw=5.5 EMSC OFFSHORE TARAPACA, CHILE

P: 1JUN2023 153870 20.0S 69.0W 4.0-6.1 AAAAA So. Peru/Bolivia

P: 30MAY2023 153588 21.0S 69.0W 4.0-5.8 AAAAA Coast No. Chile

P: 30MAY2023 153863 21.0S 69.0W 4.0-5.8 AAAAA Coast No. Chile

An unusual M 5.1 earthquake also shook the area of Turkmenistan today. The is the strongest earthquake within about 200 km of this epicenter in Turkmenistan since an M 5.1 on March 22, 2023 with the last of larger magnitude an M 5.3-5.4 on May 16 and again on 17, 2021. Forecast 153777 had expected this event was likely within about 25 km around June 1, 2023.

O: 31MAY2023 04:04:49 39.7N 55.0E mb=5.1 EMSC TURKMENISTAN

P: 1JUN2023 153777 40.0N 55.0E 4.0-5.4 AAAAA Kazakhstan

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 31MAY2023 04:04:49 39.7N 55.0E mb=5.1 EMSC TURKMENISTAN

P: 1JUN2023 153777 40.0N 55.0E 4.0-5.4 AAAAA Kazakhstan

O: 30MAY2023 17:45:42 38.6N 73.1E mb=4.5 EMSC TAJIKISTAN

P: 26MAY2023 153451 38.0N 73.0E 3.8-5.3 BAAAA Hindu Kush/Pakistan

O: 30MAY2023 20:00:54 52.5N 159.7E mb=4.0 EMSC OFF EAST COAST OF KAMCHATKA

P: 31MAY2023 153814 53.0N 160.0E 4.0-5.6 AAAAA E. of Kamchatka

O: 31MAY2023 10:48:03 22.4N 121.1E ML=4.3 TAI Hualien, Taiwan

P: 5JUN2023 153705 23.0N 123.0E 4.0-5.4 BABAA Taiwan

CWB reported this earthquake was felt with intensity II in Pingtung and Taitung Counties, Taiwan.

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

INDONESIA AND PHILIPPINES

O: 31MAY2023 00:58:41 1.0S 98.6E mb=5.0 EMSC KEP. MENTAWAI REGION, INDONESI

P: 2JUN2023 153653 2.0S 99.0E 4.0-5.4 AAAAA So. of Sumatera

P: 29MAY2023 153359 0.0N 99.0E 4.0-5.5 AAAAA So. Sumatera

O: 30MAY2023 15:22:36 14.9N 121.8E mb=4.6 EMSC LUZON, PHILIPPINES

P: 30MAY2023 153676 16.0N 120.0E 3.5-4.9 ABBAA Luzon, Philippines

NEIC reported this earthquake of M 4.6 in Luzon, Philippines was felt with intensity II-III in the area(s) of Luzon, Philippines in Southern Tagalog at Malanday (IV), Taytay, Angono, Niogan, Manila, Plaridel, Olongapo.

O: 31MAY2023 01:58:06 23.3S 170.8E mb=4.7 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 27MAY2023 153589 23.0S 172.0E 4.0-5.5 BAAAA Loyalty Islands

CENTRAL AND SOUTH AMERICA

O: 30MAY2023 16:59:55 8.7N 77.4W ML=4.4 EMSC PANAMA-COLOMBIA BORDER REGION

P: 30MAY2023 153624 9.0N 78.0W 4.0-5.8 AAAAA Colombia

O: 30MAY2023 11:39:20 5.2S 77.0W ML=4.1 EMSC NORTHERN PERU

P: 6JUN2023 153648 6.0S 76.0W 4.0-5.7 CAAAA No. Peru

O: 30MAY2023 19:32:12 16.8N 95.0W ML=4.0 EMSC OAXACA, MEXICO

O: 30MAY2023 15:01:28 17.1N 95.1W ML=4.2 EMSC OAXACA, MEXICO

P: 1JUN2023 153667 17.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 31MAY2023 05:59:18 17.2N 101.0W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO

P: 1JUN2023 153678 18.0N 102.0W 3.5-5.6 AAAAA Michoacan, Mexico

P: 30MAY2023 153678 19.0N 101.0W 3.5-5.5 ABAAA Michoacan, Mexico

O: 30MAY2023 18:14:56 19.7N 65.7W Md=3.7 EMSC PUERTO RICO REGION

P: 28MAY2023 153395 18.0N 64.0W 3.0-5.1 ABBAA Leeward Islands

O: 30MAY2023 16:51:37 20.7S 70.5W Mw=5.5 EMSC OFFSHORE TARAPACA, CHILE

P: 1JUN2023 153870 20.0S 69.0W 4.0-6.1 AAAAA So. Peru/Bolivia

P: 30MAY2023 153588 21.0S 69.0W 4.0-5.8 AAAAA Coast No. Chile

P: 30MAY2023 153863 21.0S 69.0W 4.0-5.8 AAAAA Coast No. Chile

O: 30MAY2023 18:15:48 35.6S 75.0W ML=4.2 EMSC OFF COAST OF MAULE, CHILE

P: 30MAY2023 153875 35.0S 71.0W 4.0-5.7 AACAA Central Chile

AFRICA AND EUROPE

O: 30MAY2023 09:05:17 37.7N 35.4E ML=4.5 EMSC CENTRAL TURKEY

P: 4JUN2023 153759 38.0N 36.0E 3.5-5.0 BAAAA Turkey

O: 30MAY2023 11:20:33 38.5N 37.6E ML=4.0 EMSC CENTRAL TURKEY

P: 6JUN2023 153759 38.0N 38.0E 3.5-5.1 CAAAA Turkey

P: 24MAY2023 153488 38.0N 39.0E 3.5-5.1 CAAAA Turkey

O: 31MAY2023 04:04:49 39.7N 55.0E mb=5.1 EMSC TURKMENISTAN

P: 1JUN2023 153777 40.0N 55.0E 4.0-5.4 AAAAA Kazakhstan

SOUTHWEST PACIFIC

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

OCEAN RIDGES

O: 30MAY2023 11:30:05 57.1S 66.6W mb=4.3 EMSC DRAKE PASSAGE

P: 1JUN2023 153890 55.0S 64.0W 3.0-5.4 ABBAA So. So. America

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

ZEALANDIA AND AUSTRALIA REGION

O: 31MAY2023 02:22:15 46.7S 168.0E ML=4.4 EMSC OFF W. COAST OF S. ISLAND, N.Z

P: 6JUN2023 153885 46.0S 167.0E 3.0-5.1 CAAAA Southern S. Isl. N.Z.

P: 28MAY2023 153613 45.0S 168.0E 3.0-4.9 BBAAA So. Island, N.Z.

O: 31MAY2023 02:21:21 49.6S 163.9E Mw=6.2 EMSC AUCKLAND ISLANDS, N.Z. REGION

O: 31MAY2023 02:21:19 49.9S 163.9E ML=6.1 GEONET Snares Island, New Zealand

P: 1JUN2023 153885 47.0S 164.0E 3.0-5.0 ACAAA So. Island, N.Z.

JAPAN AND KURIL ISLANDS

O: 30MAY2023 22:48:56 33.4N 139.3E mb=4.4 EMSC IZU ISLANDS, JAPAN REGION

P: 1JUN2023 153737 33.0N 142.0E 4.0-5.5 AABAA Off East Coast Honshu

O: 30MAY2023 08:49:17 37.5N 137.4E mb=4.6 EMSC NEAR WEST COAST OF HONSHU, JAP

P: 31MAY2023 153733 37.0N 139.0E 3.5-4.9 AAAAA No. Honshu, Japan

O: 30MAY2023 13:52:02 37.5N 141.9E mb=4.3 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 28MAY2023 153465 38.0N 141.0E 4.0-5.4 AAAAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 30MAY2023 20:24:51 34.0N 119.1W ML=3.2 EMSC CHANNEL ISLANDS REG., CALIFORN

P: 1JUN2023 153749 34.0N 118.7W 2.5-4.6 AAAAA So. California

NEIC reported this earthquake of M 3.2 in Los Angeles, California was felt with intensity II-III in the area(s) of Los Angeles, California in Point Mugu Nawc, Oxnard, Port Hueneme, Newbury Park, Camarillo and others.

O: 30MAY2023 08:07:54 31.0N 116.6W ML=3.3 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 30MAY2023 18:37:05 31.2N 115.6W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

O: 30MAY2023 10:08:28 31.7N 115.1W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 32.4N 115.8W 2.5-4.6 AAAAA So. California

O: 30MAY2023 08:09:58 32.4N 115.2W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 32.4N 115.8W 2.5-4.6 AAAAA So. California

O: 31MAY2023 05:37:45 33.3N 116.3W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 30MAY2023 07:37:22 33.2N 115.6W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 3JUN2023 153746 32.9N 115.6W 2.5-4.6 BAAAA So. California

P: 29MAY2023 153471 32.4N 115.8W 2.5-4.6 AAAAA So. California

O: 31MAY2023 03:00:51 36.4N 118.2W ML=3.0 EMSC CENTRAL CALIFORNIA

O: 31MAY2023 03:00:51 36.4N 118.2W ML=3.2 ANSS CENTRAL CALIFORNIA

P: 1JUN2023 153709 36.1N 118.1W 2.5-4.9 AAAAA California/Nevada area

NEIC reported this earthquake of M 3.2 in Central California was felt with intensity II-III in the area(s) of Central California in East Tulare County, Three Rivers, Springville, Kings Canyon National Park and Visalia.

O: 31MAY2023 01:58:54 36.6N 121.2W Md=2.1 EMSC CENTRAL CALIFORNIA

P: 3JUN2023 153716 36.8N 121.3W 2.5-4.4 BAAAA Central California

O: 30MAY2023 08:31:38 37.3N 117.6W ml=3.5 EMSC CENTRAL CALIFORNIA

P: 3JUN2023 153710 37.2N 117.3W 2.5-4.7 BAAAA California/Nevada area

NEIC reported this earthquake of M 3.5 in Central California was felt with intensity II-III in the area(s) of Central California in Fresno.

O: 31MAY2023 04:27:57 38.6N 118.5W ml=2.1 EMSC NEVADA

P: 28MAY2023 153435 38.2N 118.8W 2.5-4.6 BAAAA California/Nevada area

O: 31MAY2023 05:11:59 40.2N 121.1W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 2JUN2023 153792 40.0N 121.0W 2.5-4.7 AAAAA Northern California

P: 28MAY2023 153516 40.2N 121.2W 2.5-4.5 BAAAA Northern California

O: 30MAY2023 11:00:13 40.4N 125.4W ML=2.8 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 30MAY2023 11:00:13 40.4N 125.4W ML=3.1 ANSS OFFSHORE NORTHERN CALIFORNIA

O: 30MAY2023 12:44:22 40.6N 124.3W Md=2.0 EMSC NORTHERN CALIFORNIA

P: 29MAY2023 153518 40.5N 125.8W 2.5-4.4 AABAA Off Coast of No. Calif

NEIC reported this earthquake of M 3.1 off the coast of Northern California was felt with intensity II-III in the area(s) of Northern California in Arcata.

ALASKA

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

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 31MAY2023 06:02:16 54.5N 118.5W MB=3.9 ECAN of Grande Prairie, AB

O: 31MAY2023 06:02:16 54.5N 118.5W ML=3.9 EMSC ALBERTA, CANADA

P: 1JUN2023 153808 56.0N 120.0W 2.0-4.2 ABAAA Alberta

ROCKY MOUNTAINS REGION

O: 30MAY2023 11:49:29 31.6N 104.2W ML=2.6 EMSC WESTERN TEXAS

O: 30MAY2023 13:23:30 31.6N 104.3W ML=2.5 EMSC WESTERN TEXAS

P: 26MAY2023 153470 31.4N 104.2W 2.0-4.1 BAAAA SW U.S.A

EASTERN U.S./CANADA

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

HAWAII

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

MODERATE QUAKES SHAKE AREAS SOUTH OF AFRICA AND VOLCANO ISLANDS, JAPAN

EARTHQUAKE SUMMARY FOR MAY 29, 2023

The strongest earthquakes of the day occurred as an M 5.7 Southwest of Africa

and as an M 5.8-5.9 in the Volcano Islands of southeastern Japan. The only earthquake in the Volcano Islands of similar magnitude occurrred about 200 km north of today's epicenter as an M 5.7 on November 7, 2020. The last earthquake in the Volcano Islands of M>=5.8 occurred on August 16, 2018. At the time this summary noted the importance of Tropical Cyclone Soulik in triggering this event as:

“A pair of strong earthquakes in the Volcano Islands of M 6.0 and 6.3-6.4 today were likely triggered by the passage of Typhoon Soulik over the epicenter today. Typhoon Soulik has winds up to 80 kts. This storm is expected to pass to the northwest over the next several days reaching Kyushu, Japan around August 21. This is a classic example of weather-related seismic triggering. ...

The last earthquake of M>=6.3 in the Volcano Islands within about 200 km of today's epicenters occurred as an M 7.5 on September 18, 2007 and prior to that on July 3, 2001. Earthquakes also hit the region with M 7.6 on March 28, 2000 and January 1, 1998 (M 6.6)." (August 17, 2018)

The Volcano Islands are located north of Guam which was hit by a super-typhoon (Mawar) over the past two days. The earthquake in the Volcano Islands occurred as Super-Typhoon Mawas passed through the region and may have been promoted by energy associated with that storm, the strongest in the region in the past two decades as noted in this and previous issues of this summary as:

"Typhoon Mawar (02W) continued today in the area East of Taiwan and northern Philippines. It is expected to track to the northwest reaching Taiwan around May 31 as a typhoon with winds up to 135 kts. It is likely that a moderate to strong earthquake could occur near northern Philippines or Taiwan with this storm in the next week. This appears to be the strongest typhoon to hit Guam in the past two decades." (May 30, 2023)

Forecasts 153428 and 153693 had expected this activity in the Volcano Islands was likely at the end of May or early June, 2023.

O: 30MAY2023 00:52:08 24.0N 143.0E Mw=5.8 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 1JUN2023 153693 26.0N 144.0E 4.0-5.6 ABAAA Bonin Islands

P: 26MAY2023 153428 22.0N 145.0E 4.0-5.4 BBBAA Volcano Islands

The earthquake of M 5.7 South of Africa today is near the antipode of the Andreanof Islands, Alaska at 53N 170W. A moderate far-field earthquake in the

Andreanof Islands near the this antipode is likely in the next several days. This earthquake in the area southwest of Africa was not reported felt in this remote oceanic area. This event occurred west of the M 6.8 south of Africa in the Prince Edward Islands of May 21, 2023 and may have been promoted by strong regional stress redistribution from that event. Equal or larger events within about 300 km of today's epicenter occurred as an M 5.9 on August 9, 2020 and an M 6.6 on January 28, 2018. This earthquake is located near 103 degrees from the M 7.3 in Tajikistan of February 23, 2023 and may have been promoted by energy from that source. Other activity at this distance from Tajikistan today occurred in Central California, New Madrid and Kentucky. It is also at 102 degrees from the Loyalty Islands where a series of major earthquakes occurred around May 19 and was probably promoted by energy from that source as well.

O: 29MAY2023 21:52:05 53.0S 10.4E Mw=5.7 EMSC SOUTHWEST OF AFRICA

Another recent typhoon landfall has occurred in the Bay of Bengal in the area of India and Myanmar. This Tropical Cyclone was described in past issues of this summary as:

An earthquake of M 5.2 also occurred in the Drake Passage north of Antarctica and south of South America today. It was not reported felt in this remote oceanic area. The only even of M>5.1 in the Drake Passage in the past three years was an M 5.4 about 500 km southeast of this epicenter on June 23, 2021. Forecast 153890 had expected seismic enhancement in this area was likely at the end of May or in early June, 2023.

O: 30MAY2023 04:35:01 56.7S 69.4W ML=5.1 EMSC DRAKE PASSAGE

P: 1JUN2023 153890 55.0S 64.0W 3.0-5.4 ABCAA So. So. America

The most unusual earthquake in the U.S. or Canada today occurred in western

Kentucky. This event of M 3.3 was followed by an M 2.4 aftershock. NEIC reported this earthquake of M 3.0-3.3 in Western Kentucky was felt with intensity IV in the area(s) of Western Kentucky in Calhoun, Rumsey, Sacramento, Hanson; III in Livermore, Madisonville, Benton and Louisville and in Indiana at Newburgh and Evansville. The last earthquake of M>2 in western Kentucky was recorded about 150 km west of today's epicenter with M 2.0 on April 4, 2021 and January 18, 2021. The last earthquake of M>=3.3 within about 150 km of this epicenter in Kentucky occurred as an M 3.8 on September 19, 2017. This event occurred several hours before a great earthquake in Chiapas and several major solar flares. Forecast 153458 had expected today's event was likely within about 150 km around May 26. This epicenter is located at 144 degrees from the M 7.0 in Java of April 14 and the M 7,3 in Nias, Sumatra, Indonesia of April 24 and at 103 degrees from the M 7.2 in Tajikistan of February 23, 2023 and may have been promoted by energy from those sources.

O: 30MAY2023 02:49:42 37.5N 87.4W Md=2.4 EMSC WESTERN KENTUCKY

O: 30MAY2023 02:45:21 37.5N 87.3W mb=3.3 EMSC WESTERN KENTUCKY

P: 26MAY2023 153458 38.0N 89.0W 2.0-4.1 BABAA New Madrid area

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 29MAY2023 14:17:50 40.5N 84.2E mb=4.2 EMSC SOUTHERN XINJIANG, CHINA

P: 25MAY2023 153503 41.0N 83.0E 4.0-5.4 BAAAA Kirgizstan/Xinjiang

O: 29MAY2023 15:34:31 51.8N 104.7E mb=3.7 EMSC LAKE BAYKAL REGION, RUSSIA

P: 31MAY2023 153825 51.0N 98.0E 3.0-4.6 AACAA So. Siberia

INDONESIA AND PHILIPPINES

O: 30MAY2023 02:42:02 3.6S 134.9E ML=4.1 EMSC PAPUA, INDONESIA

P: 30MAY2023 153659 2.0S 133.0E 4.0-5.6 ABAAA West Irian, PNG

O: 29MAY2023 23:15:51 6.4S 130.0E ML=4.4 EMSC BANDA SEA

O: 29MAY2023 15:59:59 7.2S 130.6E mb=4.5 EMSC KEP. TANIMBAR REGION, INDONESIA

P: 30MAY2023 153660 6.0S 130.0E 4.0-5.8 AAAAA West Irian, PNG

O: 29MAY2023 13:52:52 7.7S 128.7E mb=4.7 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 28MAY2023 153361 7.0S 128.0E 4.0-5.5 AAAAA Banda Sea

O: 29MAY2023 17:08:16 9.8N 125.2E mb=4.6 EMSC MINDANAO, PHILIPPINES

P: 27MAY2023 153395 10.0N 125.0E 3.5-5.0 AAAAA Luzon, Philippines

NEIC reported this earthquake of M 4.6 in Mindanao, Philippines was felt with intensity II-III in the area(s) of Mindanao, Philippines in Brasilisa, Caraga (V) and in Southern Tagalog at Lucsuhin (II).

O: 30MAY2023 01:04:32 13.4N 120.8E mb=4.7 EMSC MINDORO, PHILIPPINES

P: 21MAY2023 153396 13.0N 121.0E 3.5-4.9 CAAAA Luzon, Philippines

P: 26MAY2023 153396 12.0N 122.0E 3.5-5.0 BBAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 29MAY2023 13:59:09 15.7N 93.5W ML=4.2 EMSC CHIAPAS, MEXICO

P: 26MAY2023 153386 16.0N 93.0W 3.5-5.5 BAAAA Chiapas, Mexico

O: 29MAY2023 09:36:02 18.9N 68.5W ML=3.9 EMSC DOMINICAN REPUBLIC REGION

O: 29MAY2023 09:38:15 18.8N 68.1W ML=3.6 EMSC DOMINICAN REPUBLIC REGION

P: 28MAY2023 153407 18.0N 68.0W 3.4-5.4 AAAAA Puerto Rico

O: 29MAY2023 20:56:17 19.2N 69.9W ML=3.0 EMSC DOMINICAN REPUBLIC

P: 30MAY2023 153691 20.0N 69.0W 3.0-4.4 AAAAA Bahamas/No. Caribbean

O: 30MAY2023 06:35:16 29.5S 71.3W ML=4.2 EMSC COQUIMBO, CHILE

P: 29MAY2023 153587 29.0S 72.0W 4.0-5.4 AAAAA Coast Central Chile

O: 29MAY2023 15:02:29 31.7S 66.8W mb=4.9 EMSC LA RIOJA, ARGENTINA

P: 30MAY2023 153601 32.0S 70.0W 4.0-5.8 AABAA Central Chile

NEIC reported this earthquake of M 4.9 in Argentina was felt with intensity II-III in the area(s) of Argentina in San Juan.

AFRICA AND EUROPE

O: 30MAY2023 05:45:01 28.0S 26.8E ML=3.0 EMSC SOUTH AFRICA

P: 3JUN2023 153866 27.0S 27.0E 3.0-4.4 BAAAA Rep. South Africa

O: 29MAY2023 19:16:31 47.4N 6.9E ML=3.8 EMSC SWITZERLAND

P: 26MAY2023 153495 45.0N 7.0E 3.0-5.4 BCAAA Austria

O: 29MAY2023 16:46:23 47.7N 15.9E ML=3.3 EMSC AUSTRIA

P: 31MAY2023 153776 44.0N 16.0E 3.0-5.1 ACAAA Italy

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

SOUTHWEST PACIFIC

O: 29MAY2023 19:09:55 14.2S 170.6E mb=5.0 EMSC VANUATU REGION

P: 4JUN2023 153845 14.0S 172.0E 4.0-5.4 BAAAA Fiji Islands

O: 29MAY2023 10:04:58 14.9S 166.9E Mw=5.2 EMSC VANUATU

P: 27MAY2023 153583 14.0S 167.0E 4.0-5.4 AAAAA Vanuatu Islands

NEIC reported this earthquake of M 5.2 in Vanuatu was felt with intensity II-III in the area(s) of Vanuatu in Luganville, Sanma.

O: 30MAY2023 04:01:32 17.2S 172.4W mb=4.8 EMSC TONGA REGION

P: 28MAY2023 153580 17.0S 172.0W 4.0-5.7 AAAAA Tonga Islands

OCEAN RIDGES

O: 29MAY2023 21:52:05 53.0S 10.4E Mw=5.7 EMSC SOUTHWEST OF AFRICA

O: 30MAY2023 04:35:01 56.7S 69.4W ML=5.1 EMSC DRAKE PASSAGE

P: 1JUN2023 153890 55.0S 64.0W 3.0-5.4 ABCAA So. So. America

ZEALANDIA AND AUSTRALIA REGION

O: 29MAY2023 12:37:57 33.6S 178.5E ML=4.1 EMSC SOUTH OF KERMADEC ISLANDS

P: 25MAY2023 153608 32.0S 179.0E 4.0-5.4 BBAAA So. Kermadec Islands

JAPAN AND KURIL ISLANDS

O: 30MAY2023 00:52:08 24.0N 143.0E Mw=5.8 EMSC VOLCANO ISLANDS, JAPAN REGION

P: 1JUN2023 153693 26.0N 144.0E 4.0-5.6 ABAAA Bonin Islands

P: 26MAY2023 153428 22.0N 145.0E 4.0-5.4 BBBAA Volcano Islands

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 29MAY2023 10:49:57 30.7N 116.3W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 29MAY2023 19:59:20 30.8N 116.2W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 29MAY2023 07:14:58 31.2N 115.3W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

O: 29MAY2023 20:52:07 30.5N 116.2W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 29MAY2023 20:20:32 31.4N 114.6W ML=3.4 EMSC GULF OF CALIFORNIA

O: 29MAY2023 20:18:08 31.4N 114.6W ML=3.5 EMSC GULF OF CALIFORNIA

P: 27MAY2023 153468 30.2N 114.1W 2.0-4.1 ABAAA SW U.S.A

O: 29MAY2023 13:40:00 37.3N 117.6W ML=2.6 EMSC NEVADA

P: 27MAY2023 153433 37.1N 117.8W 2.5-4.7 AAAAA California/Nevada area

O: 29MAY2023 10:44:52 37.5N 118.8W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 28MAY2023 153434 37.5N 118.6W 2.5-4.7 AAAAA California/Nevada area

O: 29MAY2023 19:48:37 38.4N 122.4W Md=2.4 EMSC NORTHERN CALIFORNIA

P: 31MAY2023 153717 38.9N 122.8W 2.5-4.6 AAAAA Central California

O: 29MAY2023 08:31:46 40.7N 121.9W Md=2.6 EMSC NORTHERN CALIFORNIA

P: 28MAY2023 153516 40.2N 121.2W 2.5-4.5 AAAAA Northern California

NEIC reported this earthquake of M 2.6 in Northern California was felt with intensity II-III in the area(s) of Northern California in Shasta Lake, Redding.

ALASKA

O: 30MAY2023 04:14:19 51.5N 176.1W mb=3.8 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 30MAY2023 153810 51.1N 174.6W 3.5-5.0 AAAAA Andreanoff Isls, Aleutians

O: 29MAY2023 13:35:50 51.6N 178.9E mb=3.9 EMSC RAT ISLANDS, ALEUTIAN ISLANDS

P: 3JUN2023 153823 51.0N 177.0E 4.0-5.8 BABAA Rat Islands

P: 22MAY2023 153548 51.0N 179.0E 4.0-5.6 CAAAA Rat Islands

O: 29MAY2023 12:37:12 54.5N 161.7W ml=3.4 EMSC ALASKA PENINSULA

P: 25MAY2023 153552 54.6N 163.6W 3.5-4.9 BABAA Unimak 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

O: 29MAY2023 17:10:33 46.5N 67.8W MB=2.0 ECAN of Centreville, NB

P: 27MAY2023 153498 46.0N 66.0W 2.0-4.1 AABAA E. of Maine

O: 29MAY2023 09:17:36 48.5N 69.0W MB=1.8 ECAN of Portneuf-sur-Mer, QC

O: 29MAY2023 10:20:49 48.7N 68.6W MB=2.1 ECAN of Rimouski, QC

P: 7JUN2023 153780 49.3N 67.5W 2.0-3.9 CAAAA Maine

O: 28MAY2023 18:28:02 72.0N 74.8W MB=2.6 ECAN of Pond Inlet, NU

O: 28MAY2023 22:49:03 73.8N 72.3W MB=3.1 ECAN of Pond Inlet, NU

P: 28MAY2023 153567 73.3N 73.5W 2.5-4.1 AAAAA Baffin/Davis Strait Canada

O: 28MAY2023 10:12:18 50.5N 64.7W MB=2.0 ECAN of Rivi├¿re-au-Tonnerre, QC

P: 29MAY2023 153498 49.0N 66.0W 2.0-4.1 AAAAA E. of Maine

O: 28MAY2023 03:27:52 47.4N 70.1W MB=0.5 ECAN of La Pocati├¿re, QC

O: 27MAY2023 12:21:08 47.4N 70.2W MB=0.9 ECAN of La Pocati├¿re, QC

O: 28MAY2023 08:51:34 47.2N 70.4W MB=1.4 ECAN of Saint-Jean-Port-Joli, QC

P: 29MAY2023 153505 47.0N 70.0W 2.0-4.4 AAAAA Maine

O: 30MAY2023 02:49:42 37.5N 87.4W Md=2.4 EMSC WESTERN KENTUCKY

O: 30MAY2023 02:45:21 37.5N 87.3W mb=3.3 EMSC WESTERN KENTUCKY

P: 26MAY2023 153458 38.0N 89.0W 2.0-4.1 BABAA New Madrid area

O: 30MAY2023 00:48:48 35.7N 98.1W ML=2.3 EMSC OKLAHOMA

P: 28MAY2023 153484 35.0N 96.0W 2.0-4.2 AABAA Southern Plains

O: 30MAY2023 01:49:18 36.3N 89.5W Md=2.3 EMSC TENNESSEE

P: 24MAY2023 153458 36.0N 89.0W 2.0-4.0 CAAAA New Madrid area

HAWAII

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

UNUSUAL EARTHQUAKE SHAKES VICTORIA, AUSTRALIA

EARTHQUAKE SUMMARY FOR MAY 28, 2023

An unusual earthquake of M 3.6 was widely felt in Victoria, Australia today. NEIC reported it was felt with maximum intensity IV in Craigieburn and II-III in Sunbury, Melbourne, Melton, Baccus Marsh, Healesville, Clifton Springs, Pakenham and Leopold. The last earthquake of equal or larger magnitude within about 200 km of today's epicenter was an M 4.6 about 200 km southeast of this on July 20, 2012 - an aftershock of an M 5.4 on June 19, 2012. The only earthquakes within about 150 km of today's epicenter in the past 35 years were both of M 3.6 - on November 8, 1992 and August 21, 2001. When the M 5.4 hit southeast of this on June 19, 2012 this summary noted in this regard:

"A moderate earthquakes of M 5.2 occurred off the southeastern coast of Australia today and was widely felt in Victoria, New South Wales and Canberra.

....

This is the largest earthquake to hit Victoria in decades. Because it was offshore, damage was minimized occurring as cracked walls and as damage to items which fell from shelves in supermarkets and other stores. It is the largest since 1982 and the third largest in the past 100 years in the region of Victoria. Damage was done to supermarkets and pharmacies in Moe, Newborough, Trafalgar and Morwell and in some cases shelves collapsed. The shaking lasted for about 40 seconds. No damage occurred to infrastructure such as roads, rail, dams and power supply. An earthquake of M 5.5 hit near this on June 16, 1981 with the largest in modern times an M 6.0 on June 20, 1969 exactly 43 years ago today. (the two events both occurred at about 1100 UT as well). With the three largest events occurring near the summer solstice there could be a seasonal seismic factor involved in this timing as well." (June 19, 2012)

Today's epicenter is at 101 degrees from the M 7.2 in Tajikistan of February 23, 2023 and may have been promoted by energy from that source.

O: 28MAY2023 13:41:51 37.6S 144.8E mb=3.6 EMSC NEAR S.E. COAST OF AUSTRALIA

The strongest earthquake in the world today was an M 5.3 in Northern Colombia. NEIC reported it was felt in Santander, Colombia at Barichara, Floridablaca, Bucaramanga; in Tunja Boyaca and in Chiquinquira and in Cundinamarca at Chia, Cota, La Calera, Funza and in Bogota, Colombia. This appears to be part of a general seismic activation period in Colombia which included, but has not been limited to the epicenter of an M 6.6 on May 25, 2023. In the past week six distinct epicenters in Colombia have see earthquakes of M>=4 but today's event is the strongest besides the M 6.6 on May 25. This could be due to regional stress redistribution or to the far-field effects of recent major earthquakes as noted in previous issues of this summary. For example on May 25 it was noted:

"... of Colombia. This epicenter is also at 103 degrees from the M 7.8 in Turkey of February 6, 2023 and the M 7.2 in the Kermadec Islands of April 24, 2023 and near this distance from the M 7.6 in Tonga of May 10 and the M 7.8 in the Loyalty Islands of May 19 and may have been promoted by energy from those sources." (May 25, 2023)

The only events of M>=5.3 within about 200 km of today's epicenter in Northern

Colombia in the past three years occurred as an M 5.5 on February 23, 2022 and an M 5.4 on March 10, 2023. Forecast 153352 had expected today's event was likely within about 25 km in Colombia around May 25, 2023.

O: 28MAY2023 15:45:57 6.7N 73.0W Mw=5.3 EMSC NORTHERN COLOMBIA

P: 25MAY2023 153352 7.0N 73.0W 4.0-5.9 BAAAA Colombia

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 29MAY2023 02:33:32 26.8N 92.4E mb=4.8 EMSC ASSAM, INDIA

P: 20MAY2023 153148 27.0N 92.0E 4.0-5.4 CAAAA Myanmar

P: 29MAY2023 153421 27.0N 88.0E 3.5-5.8 AACAA Nepal

NEIC reported this earthquake of M 4.8 in Assam, India was felt with intensity II-III in the area(s) of Assam, India with V in Dhekiajuli and Nagaon with IV in Palasbari and III in Assam in Jorhat, Dispur, Kharupetia and III in Bhangtar Samdrup, Bhutan.

O: 28MAY2023 18:51:24 28.7N 91.5E mb=4.4 EMSC EASTERN XIZANG

P: 20MAY2023 153148 27.0N 92.0E 4.0-5.4 CBAAA Myanmar

O: 28MAY2023 07:53:00 35.1N 85.9E mb=4.0 EMSC XINJIANG-XIZANG BORDER REGION

P: 29MAY2023 153493 34.0N 89.0E 3.8-5.2 ABCAA Xizang

O: 28MAY2023 12:56:54 34.5N 70.6E mb=4.7 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 28MAY2023 153467 34.0N 74.0E 3.8-5.2 AACAA Pakistan

NEIC reported this earthquake of M 4.7 in Punjab, Pakistan was felt with intensity II-III in the area(s) of Punjab, Pakistan in Wah, Rawalpindi and Sharqpur.

O: 28MAY2023 15:22:10 38.4N 45.1E mb=4.1 EMSC NORTHWESTERN IRAN

P: 29MAY2023 153490 39.0N 41.0E 3.5-4.9 AACAA Turkey

O: 29MAY2023 01:33:11 52.7N 159.3E mb=4.2 EMSC OFF EAST COAST OF KAMCHATKA

P: 29MAY2023 153540 52.0N 161.0E 4.0-5.4 AAAAA E. of Kamchatka

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

INDONESIA AND PHILIPPINES

O: 28MAY2023 20:18:25 1.1S 120.2E ML=4.1 EMSC SULAWESI, INDONESIA

O: 28MAY2023 21:05:22 1.1S 120.3E ML=4.0 EMSC SULAWESI, INDONESIA

P: 28MAY2023 153348 0.0N 120.0E 4.0-5.4 ABAAA Celebes Sea

O: 28MAY2023 21:12:55 3.1N 122.8E ML=4.5 EMSC CELEBES SEA

P: 27MAY2023 153356 2.0N 125.0E 4.0-5.4 ABCAA Mindanao, Philippines

O: 28MAY2023 19:55:03 8.7S 119.3E ML=4.0 EMSC FLORES REGION, INDONESIA

P: 24MAY2023 153381 9.0S 118.0E 4.0-5.4 BABAA Sumbawa Island area

O: 28MAY2023 13:30:00 5.8S 148.0E mb=4.4 EMSC NEW BRITAIN REGION, P.N.G.

O: 28MAY2023 12:52:39 5.6S 149.8E Mw=5.1 EMSC NEW BRITAIN REGION, P.N.G.

P: 27MAY2023 153370 6.0S 150.0E 4.0-5.4 AAAAA New Ireland

NEIC reported this earthquake of M 5.1 in New Britain was felt with intensity II-III in the area(s) of New Britain in Kimbe and in Port Moresby, Papua New Guinea.

O: 29MAY2023 02:18:18 13.5N 94.1E mb=4.5 EMSC ANDAMAN ISLANDS, INDIA REGION

P: 19MAY2023 153115 11.0N 94.0E 4.0-5.4 CCAAA Andaman Islands

CENTRAL AND SOUTH AMERICA

O: 28MAY2023 15:45:57 6.7N 73.0W Mw=5.3 EMSC NORTHERN COLOMBIA

P: 25MAY2023 153352 7.0N 73.0W 4.0-5.9 BAAAA Colombia

O: 29MAY2023 02:45:22 5.1S 77.2W ML=4.1 EMSC NORTHERN PERU

P: 25MAY2023 153365 4.0S 80.0W 4.0-5.7 BBCAA Ecuador

O: 28MAY2023 15:45:57 6.7N 73.0W Mw=5.3 EMSC NORTHERN COLOMBIA

P: 25MAY2023 153352 7.0N 73.0W 4.0-5.9 BAAAA Colombia

O: 29MAY2023 00:02:53 7.0N 76.2W mb=4.3 EMSC NORTHERN COLOMBIA

P: 27MAY2023 153352 7.0N 78.0W 4.0-5.9 AABAA Colombia

O: 29MAY2023 04:57:33 8.0S 74.4W Mw=5.1 EMSC CENTRAL PERU

P: 27MAY2023 153362 9.0S 75.0W 3.5-5.1 AAAAA Brazil

O: 29MAY2023 03:32:33 8.6S 79.6W ML=4.0 EMSC NEAR COAST OF NORTHERN PERU

P: 23MAY2023 153371 9.0S 81.0W 4.0-5.6 CABAA No. Peru

O: 29MAY2023 02:44:19 9.6S 76.1W ML=4.2 EMSC CENTRAL PERU

P: 27MAY2023 153362 9.0S 75.0W 3.5-5.1 AAAAA Brazil

O: 28MAY2023 20:27:21 14.2N 92.8W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 30MAY2023 153391 14.0N 91.0W 3.5-5.1 AABAA Guatemala

O: 28MAY2023 18:40:23 15.5N 94.9W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 30MAY2023 153405 15.0N 96.0W 3.5-5.6 AAAAA Oaxaca, Mexico

O: 28MAY2023 19:08:22 15.9S 72.0W mb=4.8 EMSC SOUTHERN PERU

P: 23MAY2023 153577 16.0S 72.0W 4.0-5.4 BAAAA So. Peru/Bolivia

O: 28MAY2023 10:07:20 18.1N 66.2W Md=3.1 EMSC PUERTO RICO

P: 26MAY2023 153408 19.0N 67.0W 3.4-5.3 AAAAA Puerto Rico

O: 28MAY2023 16:16:01 18.1N 105.9W mb=4.4 EMSC OFF COAST OF JALISCO, MEXICO

P: 24MAY2023 153399 19.0N 104.0W 3.5-5.2 BABAA Michoacan, Mexico

O: 28MAY2023 10:26:15 18.2N 100.9W ML=4.2 EMSC GUERRERO, MEXICO

P: 30MAY2023 153400 19.0N 101.0W 3.5-5.5 AAAAA Michoacan, Mexico

O: 28MAY2023 10:54:46 18.4N 104.3W ML=4.1 EMSC OFFSHORE COLIMA, MEXICO

P: 24MAY2023 153399 19.0N 104.0W 3.5-5.2 BAAAA Michoacan, Mexico

P: 27MAY2023 153399 18.0N 103.0W 3.5-5.3 AAAAA Michoacan, Mexico

O: 28MAY2023 20:09:06 18.7N 67.4W Md=3.0 EMSC PUERTO RICO REGION

O: 28MAY2023 16:08:45 18.9N 68.5W ML=3.1 EMSC DOMINICAN REPUBLIC REGION

O: 28MAY2023 22:50:35 19.3N 68.4W Md=3.6 EMSC DOMINICAN REPUBLIC REGION

O: 28MAY2023 20:37:48 19.4N 68.3W Md=3.8 EMSC DOMINICAN REPUBLIC REGION

P: 28MAY2023 153407 18.0N 68.0W 3.4-5.4 AAAAA Puerto Rico

O: 28MAY2023 09:36:02 19.1N 64.8W Md=3.6 EMSC VIRGIN ISLANDS REGION

O: 28MAY2023 11:50:51 19.1N 64.8W Md=3.6 EMSC VIRGIN ISLANDS REGION

O: 28MAY2023 12:20:03 19.1N 64.8W Md=3.3 EMSC VIRGIN ISLANDS REGION

P: 28MAY2023 153395 18.0N 64.0W 3.0-5.1 ABAAA Leeward Islands

O: 28MAY2023 11:19:37 19.7N 65.8W Md=3.3 EMSC PUERTO RICO REGION

O: 28MAY2023 20:47:11 19.0N 65.4W Md=3.7 EMSC PUERTO RICO REGION

O: 28MAY2023 22:31:15 19.6N 65.7W Md=3.4 EMSC PUERTO RICO REGION

P: 26MAY2023 153408 19.0N 67.0W 3.4-5.3 AAAAA Puerto Rico

O: 28MAY2023 13:44:40 19.6N 70.7W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 26MAY2023 153413 20.0N 71.0W 3.0-4.7 AAAAA Bahamas/No. Caribbean

O: 29MAY2023 02:41:26 24.2S 67.0W mb=4.1 EMSC SALTA, ARGENTINA

P: 26MAY2023 153585 23.0S 67.0W 4.0-5.8 BBAAA Argentina

AFRICA AND EUROPE

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

SOUTHWEST PACIFIC

O: 28MAY2023 16:13:57 10.6S 164.9E mb=4.9 EMSC SANTA CRUZ ISLANDS REGION

P: 22MAY2023 153582 11.0S 164.0E 4.0-5.4 CAAAA Vanuatu Islands

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

OCEAN RIDGES

O: 29MAY2023 02:58:09 14.5N 56.3E mb=4.5 EMSC OWEN FRACTURE ZONE REGION

P: 22MAY2023 153384 15.0N 57.0E 3.5-4.9 CAAAA Arabian Sea

O: 28MAY2023 18:05:10 58.4S 139.8W mb=5.0 EMSC PACIFIC-ANTARCTIC RIDGE

ZEALANDIA AND AUSTRALIA REGION

O: 28MAY2023 10:52:02 32.0S 179.1E ML=4.1 EMSC SOUTH OF KERMADEC ISLANDS

P: 25MAY2023 153608 32.0S 179.0E 4.0-5.4 BAAAA So. Kermadec Islands

O: 28MAY2023 13:41:51 37.6S 144.8E mb=3.6 EMSC NEAR S.E. COAST OF AUSTRALIA

JAPAN AND KURIL ISLANDS

O: 28MAY2023 18:03:11 53.2N 142.6E mb=4.6 EMSC SAKHALIN, RUSSIA

P: 25MAY2023 153527 49.0N 142.0E 3.5-5.8 BCAAA So. Kurils

O: 28MAY2023 07:00:46 42.5N 149.0E mb=4.2 EMSC OFF COAST OF HOKKAIDO, JAPAN

P: 27MAY2023 153500 44.0N 148.0E 3.5-5.7 ABAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 28MAY2023 16:32:29 30.8N 116.2W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 28MAY2023 21:07:24 30.8N 116.3W ML=3.3 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 28MAY2023 10:02:49 30.9N 116.1W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 28MAY2023 16:51:44 30.9N 114.3W ML=3.6 EMSC GULF OF CALIFORNIA

P: 27MAY2023 153468 30.2N 114.1W 2.0-4.1 AAAAA SW U.S.A

O: 28MAY2023 19:02:35 31.2N 115.2W ML=3.1 EMSC BAJA CALIFORNIA, MEXICO

O: 28MAY2023 07:44:23 31.0N 115.7W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO

O: 28MAY2023 22:45:47 31.0N 116.6W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 28MAY2023 08:47:25 32.4N 115.2W Ml=2.0 EMSC BAJA CALIFORNIA, MEXICO

O: 28MAY2023 08:41:55 32.4N 115.2W Ml=2.6 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 32.4N 115.8W 2.5-4.6 AAAAA So. California

O: 29MAY2023 00:31:10 37.0N 121.5W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 26MAY2023 153442 37.8N 122.6W 2.5-4.4 BAAAA Central California

ALASKA

O: 29MAY2023 03:25:03 55.6N 158.8W ML=3.0 EMSC ALASKA PENINSULA

P: 25MAY2023 153533 55.8N 157.7W 3.5-5.4 BAAAA Alaska Peninsula

O: 28MAY2023 11:30:58 63.0N 149.8W mb=4.0 EMSC CENTRAL ALASKA

P: 27MAY2023 153559 62.8N 149.1W 3.2-5.1 AAAAA Central Alaska

P: 29MAY2023 153560 63.3N 151.0W 3.2-4.9 AAAAA Central Alaska

NEIC reported this earthquake of M 3.8 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska in Matanuska-Susitna Borough.

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: 28MAY2023 11:46:39 31.7N 104.3W ML=2.7 EMSC WESTERN TEXAS

O: 29MAY2023 06:57:52 31.7N 104.3W ML=2.7 EMSC WESTERN TEXAS

O: 28MAY2023 10:08:16 31.7N 104.3W ML=3.0 EMSC WESTERN TEXAS

P: 26MAY2023 153470 31.4N 104.2W 2.0-4.1 AAAAA SW U.S.A

EASTERN U.S./CANADA

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

HAWAII

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

MODERATE QUAKES IN SOLOMON IS; AFGHANISTAN AND SOUTH SANDWICH ISLANDS

EARTHQUAKE SUMMARY FOR MAY 27, 2023

It was a relatively quiet day in global seismicity. Moderate quakes occurred in the South Sandwich Islands (M 5.5) and felt in Pakistan (M 5.2) and the Solomon Islands (M 5.6) but no damaging quakes were observed. The geomagnetic field was quiet and solar flare activity was minimal. Tidal effects were also minimal mid-way between new and full moons. Typhoon Mawar which may have helped trigger one of the largest earthquakes in the region of southeastern Honshu, Japan yesterday remained a threat to Taiwan and Japan as it continued on its westward track.

A moderate earthquake shook regions of Pakistan, Hindu Kush, Afghanistan and Kashmir, India today. This event of M 5.2 was reported with maximum intensity V in Abottabad, Pakistan and Badgam, Jammu and Kashmir, Intia and IV in Pakistan at Haripur, Taxila, with lesser shaking in Peshawar, Wah, Punjab, Rawalpindi, Lahore, Sharqpur and Udhampur, India. A foreshock of M 4.3 was felt in Rawalpindi, Punjab, Pakistan with III and in Badgam, Jammu and Kashmir, India with intensity IV. This is likely an aftershock of the M 6.5 of March 21, 2023, the strongest to date. A similar M 5.2-5.3 shook the Hindu Kush area on May 3, 2023 and was reported in this summary as:

"NEIC reported this earthquake of M 5.3 in Hindu Kush, Afghanistan was felt with intensity II-III in the area(s) of Hindu Kush, Afghanistan in Kabul and in Tashkent, Uzbekistan." (May 3, 2023)

Forecast 153450 had expected today's activity in Afghanistan was likely around May 24, 2023 within about 100 km of the epicenter.

O: 28MAY2023 05:49:56 36.6N 71.2E Mw=5.2 EMSC HINDU KUSH REGION, AFGHANISTAN

O: 27MAY2023 19:24:53 36.9N 71.4E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 24MAY2023 153450 36.0N 71.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan

A moderate earthquakes also shook the region of Guadalcanal, Solomon Islands today where NEIC reported it was felt with intensity IV in Honiara. This appears to be an aftershock of an M 6.1 of May 21, 2023. At the time this summary noted in this regard:

"A strong M 6.1 was also felt in the Solomon Islands today. NEIC reported it was felt with intensity V in the Solomon Islandsa at Kirakira Makira and Ulawa and in Honiara, Guadalcanal. This is part of a regional enhancement of seismicity following the M 7.7 and 7.2 events in the Loyalty Islands of the past two day which occurred about 15 degrees south east of this epicenter in the Solomon Islands. Today's event of M 6.1 is the strongest in the Solomon Islands within about 200 km since an M 6.3 on January 27, 2020 and an M 6.5 on September 9, 2018." (May 21, 2023)

Forecast 153574 had expected today's activity in the Solomon Islands was likely towards the end of May within about 100 km of this epicenter.

O: 28MAY2023 03:29:54 10.1S 161.2E Mw=5.6 EMSC SOLOMON ISLANDS

P: 22MAY2023 153574 10.0S 160.0E 4.0-5.6 CAAAA No. of Santa Cruz Islands

A moderate earthquake of M 5.5 also occurred today in the South Sandwich Islands. It was not reported felt in this remote area. The last earthquake of M>=5.5 in the South Sandwich Islands was on April 28, 2023 when an M 5.6 was recorded. This and a second M 5.6 on April 24, 2023 are the strongest events in the South Sandwich Islands in the past three months. Today's event occurred near local solar noon and may have been promoted by tidal stresses which maximize near this hour. Forecast 153618 had expected this activity was likely within about 100 km of this epicenter around May 28.

O: 27MAY2023 15:21:47 58.0S 25.7W Mw=5.5 EMSC SOUTH SANDWICH ISLANDS REGION

P: 28MAY2023 153618 59.0S 26.0W 4.0-6.1 AAAAA So. Sandwich Islands

The largest earthquake in the U.S. or Canada today was an M 4.6 in Southern Alaska. It was followed by an M 4.4 aftershock. NEIC reported this activity was felt with intensity II-III in Alaska in the West Kenai Peninsula, Anchor Point, Homer, Kenai and Anchorage. This is the strongest earthquake within about 150 km of this epicenter since an M 5.0 on February 2, 2023 and prior to that an M 4.7 on March 23, 2022. Earthquakes in this area generally occur at intermediate depths and are not destructive at the earth's surface. Forecast 153555 had expected this event was likely within about 10 km around May 25, 2023.

O: 27MAY2023 16:49:22 60.3N 153.0W mb=4.6 EMSC SOUTHERN ALASKA

P: 25MAY2023 153555 60.3N 153.0W 3.2-5.1 AAAAA Central Alaska

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 27MAY2023 11:45:56 20.1N 72.9E ML=3.3 EMSC NEAR THE COAST OF GUJARAT, INDIA

O: 27MAY2023 11:58:00 20.0N 73.0E ML=3.5 EMSC NEAR THE COAST OF GUJARAT, IND

P: 28MAY2023 153417 23.0N 71.0E 3.5-4.9 ACBAA India

O: 27MAY2023 21:36:33 27.1N 92.6E mb=4.4 EMSC ARUNACHAL PRADESH, INDIA

P: 20MAY2023 153148 27.0N 92.0E 4.0-5.4 CAAAA Myanmar

NEIC reported this earthquake of M 4.4 in Assam, India was felt with intensity II-III in the area(s) of Assam, India in Rangia.

O: 27MAY2023 06:00:00 28.2N 51.2E ML=4.0 EMSC SOUTHERN IRAN

P: 27MAY2023 153425 29.0N 51.0E 3.5-5.2 AAAAA So. Iran/Persian Gulf

O: 28MAY2023 07:52:59 35.1N 86.0E ML=4.2 EMSC XINJIANG-XIZANG BORDER REGION

P: 29MAY2023 153493 34.0N 89.0E 3.8-5.2 ABBAA Xizang

O: 28MAY2023 05:49:56 36.6N 71.2E Mw=5.2 EMSC HINDU KUSH REGION, AFGHANISTAN

O: 27MAY2023 19:24:53 36.9N 71.4E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 24MAY2023 153450 36.0N 71.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan

O: 27MAY2023 17:24:14 38.2N 73.0E mb=4.2 EMSC TAJIKISTAN

P: 26MAY2023 153451 38.0N 73.0E 3.8-5.3 AAAAA Hindu Kush/Pakistan

O: 27MAY2023 19:43:13 51.7N 102.4E mb=3.7 EMSC RUSSIA-MONGOLIA BORDER REGION

P: 20MAY2023 153278 51.0N 98.0E 3.0-4.4 CACAA So. Siberia

O: 28MAY2023 01:17:41 54.4N 161.4E mb=4.4 EMSC NEAR EAST COAST OF KAMCHATKA

P: 28MAY2023 153540 55.0N 160.0E 4.0-5.6 AAAAA E. of Kamchatka

O: 27MAY2023 06:48:12 54.4N 163.8E mb=4.0 EMSC OFF EAST COAST OF KAMCHATKA

P: 27MAY2023 153542 55.0N 163.0E 4.0-5.7 AAAAA Komandorsky Isl

INDONESIA AND PHILIPPINES

O: 27MAY2023 13:25:30 5.8S 149.1E mb=4.4 EMSC NEW BRITAIN REGION, P.N.G.

P: 27MAY2023 153370 6.0S 150.0E 4.0-5.4 AAAAA New Ireland

O: 27MAY2023 19:36:35 6.1S 130.5E mb=5.2 EMSC BANDA SEA

P: 27MAY2023 153382 6.0S 131.0E 4.0-5.4 AAAAA West Irian, PNG

O: 27MAY2023 03:45:35 8.3S 119.7E ML=4.2 EMSC FLORES REGION, INDONESIA

P: 24MAY2023 153381 9.0S 118.0E 4.0-5.4 BABAA Sumbawa Island area

P: 29MAY2023 153366 7.0S 121.0E 4.0-5.8 ABAAA Flores Island area

O: 27MAY2023 05:52:45 8.5N 126.7E mb=4.5 EMSC MINDANAO, PHILIPPINES

P: 26MAY2023 153351 9.0N 126.0E 4.0-5.7 AAAAA Central Philippines

O: 27MAY2023 06:00:14 9.0S 113.0E ML=4.4 EMSC SOUTH OF JAVA, INDONESIA

P: 24MAY2023 153374 9.0S 113.0E 4.0-5.6 BAAAA So. of Bali

O: 28MAY2023 06:43:54 16.5N 122.4E ML=4.6 EMSC LUZON, PHILIPPINES

P: 29MAY2023 153397 16.0N 120.0E 3.5-4.9 AABAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 27MAY2023 20:54:14 8.3S 80.0W ML=4.5 EMSC OFF COAST OF NORTHERN PERU

P: 23MAY2023 153371 9.0S 81.0W 4.0-5.6 BAAAA No. Peru

O: 28MAY2023 02:56:33 8.9N 77.2W ML=4.7 EMSC PANAMA-COLOMBIA BORDER REGION

P: 27MAY2023 153352 7.0N 78.0W 4.0-5.9 ABAAA Colombia

O: 27MAY2023 06:01:11 9.3N 75.3W mb=4.5 EMSC NEAR NORTH COAST OF COLOMBIA

P: 27MAY2023 153352 7.0N 78.0W 4.0-5.9 ACCAA Colombia

O: 27MAY2023 07:52:24 16.2N 100.6W ML=4.1 EMSC OFF COAST OF GUERRERO, MEXICO

P: 26MAY2023 153406 17.0N 100.0W 3.5-5.5 AAAAA Oaxaca, Mexico

O: 28MAY2023 06:12:05 21.4S 69.8W ML=4.0 EMSC TARAPACA, CHILE

O: 28MAY2023 06:12 21.4S 69.8W mb=4.0 GUC Antofagasta at Tocopilla, Chil

P: 30MAY2023 153588 21.0S 69.0W 4.0-5.8 AAAAA Coast No. Chile

GUC reported this earthquake was felt with intensity III in Antofagasta at Tocopilla, Chile.

O: 28MAY2023 02:06:19 23.4S 69.9W Mw=4.6 EMSC ANTOFAGASTA, CHILE

O: 28MAY2023 02:06 23.4S 69.9W mb=4.6 GUC Antofagasta at Antofagasta and

P: 23MAY2023 153588 24.0S 69.0W 4.0-5.4 BAAAA Coast No. Chile

GUC reported this earthquake was felt with intensity V in Antofagasta at Antofagasta and Mejillones and III in Sierra Gorda, Chile.

NEIC reported this earthquake of M 4.6 in Northern Chile was felt with intensity II-III in the area(s) of Northern Chile in Antofagasta.

O: 27MAY2023 07:45:15 24.0S 67.1W mb=4.2 EMSC SALTA, ARGENTINA

P: 26MAY2023 153585 23.0S 67.0W 4.0-5.8 AAAAA Argentina

O: 27MAY2023 17:03:07 14.7N 92.1W ML=4.0 EMSC GUATEMALA

O: 27MAY2023 17:40:33 14.8N 92.1W ML=4.1 EMSC GUATEMALA

P: 30MAY2023 153391 14.0N 91.0W 3.5-5.1 BAAAA Guatemala

O: 28MAY2023 06:22:35 19.5N 65.7W Md=4.0 EMSC PUERTO RICO REGION

O: 27MAY2023 04:51:40 19.6N 66.3W Md=3.7 EMSC PUERTO RICO REGION

O: 28MAY2023 03:18:09 19.6N 65.6W Md=4.0 EMSC PUERTO RICO REGION

O: 28MAY2023 05:33:05 19.6N 65.7W Md=3.6 EMSC PUERTO RICO REGION

O: 28MAY2023 05:53:21 19.6N 65.7W Md=3.8 EMSC PUERTO RICO REGION

O: 27MAY2023 09:19:51 19.7N 65.8W Md=3.8 EMSC PUERTO RICO REGION

O: 28MAY2023 06:28:31 19.7N 65.7W Md=3.7 EMSC PUERTO RICO REGION

O: 27MAY2023 05:24:45 19.5N 66.3W ML=3.6 EMSC PUERTO RICO REGION

P: 26MAY2023 153408 19.0N 67.0W 3.4-5.3 AAAAA Puerto Rico

O: 27MAY2023 07:25:11 17.9N 67.0W Md=3.0 EMSC PUERTO RICO REGION

P: 28MAY2023 153407 18.0N 68.0W 3.4-5.4 AAAAA Puerto Rico

O: 27MAY2023 16:50:36 45.8S 77.4W ML=4.8 EMSC OFF COAST OF AISEN, CHILE

O: 27MAY2023 16:51:45 44.9S 78.1W ML=5.3 EMSC OFF COAST OF AISEN, CHILE

P: 27MAY2023 153609 43.0S 83.0W 4.0-5.7 ABCAA Chile Rise

AFRICA AND EUROPE

O: 27MAY2023 11:40:40 22.6S 25.1E ML=3.5 EMSC BOTSWANA

P: 23MAY2023 153591 27.0S 27.0E 3.0-4.5 BCBAA Rep. South Africa

O: 28MAY2023 04:44:22 37.7N 15.1E ML=4.0 EMSC SICILY, ITALY

P: 27MAY2023 153455 39.0N 14.0E 3.0-4.9 ABAAA Mediterranean/Sicily

O: 27MAY2023 21:36:06 37.9N 36.3E ML=4.0 EMSC CENTRAL TURKEY

P: 25MAY2023 153488 38.0N 36.0E 3.5-5.3 AAAAA Turkey

O: 27MAY2023 18:07:58 78.4N 7.1E Mw=3.5 EMSC SVALBARD REGION

O: 27MAY2023 14:24:06 78.5N 7.4E mb=4.4 EMSC SVALBARD REGION

O: 27MAY2023 16:46:16 78.5N 7.3E Mw=4.9 EMSC SVALBARD REGION

O: 27MAY2023 18:01:45 78.4N 7.0E Mw=3.6 EMSC SVALBARD REGION

P: 27MAY2023 153568 74.0N 14.0E 3.0-4.5 ACAAA Norway

SOUTHWEST PACIFIC

O: 28MAY2023 03:29:54 10.1S 161.2E Mw=5.6 EMSC SOLOMON ISLANDS

P: 22MAY2023 153574 10.0S 160.0E 4.0-5.6 CAAAA No. of Santa Cruz Islands

O: 27MAY2023 05:06:35 24.3S 179.7W mb=4.4 EMSC SOUTH OF FIJI ISLANDS

P: 25MAY2023 153598 25.0S 179.0W 4.0-5.6 AAAAA Tonga Islands

O: 27MAY2023 02:34:54 23.3S 170.6E mb=4.8 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 27MAY2023 153589 23.0S 172.0E 4.0-5.5 AAAAA Loyalty Islands

OCEAN RIDGES

O: 27MAY2023 15:21:47 58.0S 25.7W Mw=5.5 EMSC SOUTH SANDWICH ISLANDS REGION

P: 28MAY2023 153618 59.0S 26.0W 4.0-6.1 AAAAA So. Sandwich Islands

O: 27MAY2023 18:07:58 78.4N 7.1E Mw=3.5 EMSC SVALBARD REGION

O: 27MAY2023 14:24:06 78.5N 7.4E mb=4.4 EMSC SVALBARD REGION

O: 27MAY2023 16:46:16 78.5N 7.3E Mw=4.9 EMSC SVALBARD REGION

O: 27MAY2023 18:01:45 78.4N 7.0E Mw=3.6 EMSC SVALBARD REGION

P: 27MAY2023 153568 74.0N 14.0E 3.0-4.5 ACAAA Norway

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: 27MAY2023 13:52:12 30.0N 130.0E mb=4.8 EMSC KYUSHU, JAPAN

P: 30MAY2023 153418 29.0N 131.0E 4.0-5.4 BAAAA Kyushu Japan

O: 27MAY2023 21:40:30 35.8N 141.0E ML=3.6 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 27MAY2023 13:49:44 35.6N 140.9E mb=4.4 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 22MAY2023 153465 35.0N 142.0E 4.0-5.5 BAAAA Off East Coast Honshu

NEIC reported this earthquake of M 4.4 in southeast Honshu, Japan was felt with intensity II-III in the area(s) of southeast Honshu, Japan in Fukushima Prefecture.

O: 28MAY2023 07:00:46 42.5N 149.0E ML=4.4 EMSC OFF COAST OF HOKKAIDO, JAPAN

P: 27MAY2023 153500 44.0N 148.0E 3.5-5.7 ABAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 27MAY2023 22:10:36 30.3N 115.7W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 27MAY2023 09:31:40 30.6N 114.2W ML=3.5 EMSC GULF OF CALIFORNIA

P: 27MAY2023 153468 30.2N 114.1W 2.0-4.1 AAAAA SW U.S.A

O: 27MAY2023 10:59:48 30.8N 116.2W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 27MAY2023 16:53:23 30.8N 116.3W ML=3.8 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 27MAY2023 18:23:59 30.7N 116.4W ML=3.3 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 AAAAA So. California

O: 28MAY2023 08:41:55 32.4N 115.2W Ml=2.6 EMSC BAJA CALIFORNIA, MEXICO

O: 28MAY2023 08:47:25 32.4N 115.2W Ml=2.0 EMSC BAJA CALIFORNIA, MEXICO

O: 27MAY2023 05:03:42 32.1N 115.1W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 32.4N 115.8W 2.5-4.6 AAAAA So. California

O: 27MAY2023 22:24:32 36.7N 121.4W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 25MAY2023 153440 36.7N 121.4W 2.5-4.4 AAAAA Central California

O: 27MAY2023 04:35:26 40.2N 121.1W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 28MAY2023 153516 40.2N 121.2W 2.5-4.5 AAAAA Northern California

ALASKA

O: 27MAY2023 17:08:53 58.3N 155.1W ML=3.2 EMSC ALASKA PENINSULA

P: 25MAY2023 153533 55.8N 157.7W 3.5-5.4 ACBAA Alaska Peninsula

O: 27MAY2023 16:49:22 60.3N 153.0W mb=4.6 EMSC SOUTHERN ALASKA

P: 25MAY2023 153555 60.3N 153.0W 3.2-5.1 AAAAA 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: 27MAY2023 03:32:06 31.2N 103.5W ML=2.1 EMSC WESTERN TEXAS

O: 27MAY2023 06:09:08 31.7N 104.3W ML=2.0 EMSC WESTERN TEXAS

O: 27MAY2023 08:24:28 31.7N 104.3W ML=2.9 EMSC WESTERN TEXAS

P: 26MAY2023 153470 31.4N 104.2W 2.0-4.1 AAAAA SW U.S.A

O: 27MAY2023 10:37:13 44.6N 114.6W Ml=2.5 EMSC SOUTHERN IDAHO

O: 27MAY2023 23:14:33 44.8N 114.4W ML=2.5 EMSC SOUTHERN IDAHO

P: 24MAY2023 153507 44.0N 115.0W 2.0-4.3 BAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 27MAY2023 07:14:31 28.6N 98.3W ML=2.2 EMSC SOUTHERN TEXAS

P: 24MAY2023 153422 28.0N 98.0W 3.0-4.4 BAAAA Northern Mexico

HAWAII

O: 28MAY2023 00:04:21 19.3N 155.4W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII

O: 27MAY2023 16:01:31 19.2N 155.4W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII

P: 24MAY2023 153393 19.2N 155.1W 3.0-4.9 BAAAA Hawaii

STRONG EARTHQUAKE SHAKES AREA NEAR TOKYO, JAPAN

EARTHQUAKE SUMMARY FOR MAY 26, 2023

An M 6.1-6.2 earthquake shook the area of Japan near Tokyo today. NEIC reported it was felt with maximum intensity VI in Chiba, IV in Ibaraki, Saitama, Kanagawa, Tokyo, with lesser shaking in Gunma, Tochigi, Shizuoka, Miyagi, Niigata, Aichi Prefectures. JMA reported intensity IV (Japanese scale) throughout much of the area of southeastern Honshu, Japan. An aftershock of M 4.9 was reported by NEIC to have been felt with intensity III in Chiba and IV in Kochi Prefectures, Japan. This forced a number of bullet trains to stop operations temporarily. A series of earthquakes have occurred in this region of Japan in the past two weeks of M 5.0-5.5 and may have been precursory to today's event. This included an M 5.2 in Chiba Prefecture of May 11, 2023 which injured at least five elderly people in Chiba and two others in Kanagawa Prefecture while doing minor damage to buildings and roofing. At the time this summary noted in this regard:

"A moderate earthquake of M 5.2 was widely felt in the region of Tokyo, Japan today. NEIC reported maximum intensity V in Chiba and Kanagawa Prefectures with IV in Tokyo, Saitama, and lesser shaking in Ibaraki and Shizuoka Prefectures, Japan. It caused several injuries to elderly people and minor damage to buildings. The last earthquake within about 200 km of this epicenter near Tokyo, Japan with M>=5.2 was an M 5.0 on October 7, 2021. At the time this summary note in this regard:

"Today's event is the first within about 150 km of Tokyo, Japan with M>=5.9 in more than an year - since an M 5.9 on June 24, 2020. The last event of larger magnitude in this area was an M 6.2 five years ago on September 23, 2016." (October 7, 2021)

... This activity is located at the seventh node (51.5 degrees) from the major earthquake in Tajikistan of M 7.2 on February 23, 2023 and may have been promoted by energy from that source." (May 11, 2023)

Typhoon Mawar is currently south of this epicenter. Mawar is the strongest typhoon to hit the region of Guam and the Mariana Islands in more than two decades and could have influenced the timing of today's earthquake in Japan. In previous issues this summary had noted in this regard:

"Typhoon Mawar (02W) continued today in the area of west of Guam with winds up to 165 kts. It is expected to track to the northwest reaching Taiwan around May 31 as a typhoon with winds up to 165 kts. It is likely that a moderate to strong earthquake could occur near Guam or Taiwan or Southern Japan with this storm in the next week. This appears to be the strongest typhoon to hit Guam in the past two decades." (May 25-27, 2023)

Today's earthquake of M 6.1 is the strongest to hit the region within about 150 km of Tokyo since an M 6.2 on September 23, 2016 an event also accompanied by a strong typhoon. The last of M>6.2 in this region occurred as aftershocks of the M 7.9-9.3 earthquake and tsunami of March 11, 2011. On September 23, 2016 this summary noted:

"This area has been relatively quiet at M>=6 since the great earthquakes of March, 2011, but did not rupture in those events and probably is still capable of a major earthquake. The last earthquake of M>=6.3 within about 150 km of this epicenter was an M 6.4 on January 19, 2005 and prior to that an M 6.3 on May 29, 2004, the only such earthquakes in the area in the past 25 years, making this a regionally significant earthquake." (September 23, 2016)

A great earthquake with M>9 hit near this epicenter on May 27, 1293 - 830 years ago today. It, and an accompanying tsunami reportedly killed more than 22,000 (See HISTORY section of this summary).

Forecast 153465 had expected today's event was likely within about 150 km of this epicenter around May 22, 2023. This epicenter is located at the third node (120 degrees) from the M 6.8 in the Prince Edward Islands of May 21, 2023 and at the seventh node (52 degrees) from the M 7.3 in Sumatra of April 24, 2024 and the M 7.2 in Tajikistan of February 23, 2023 and may have been promoted by energy from those sources.

O: 26MAY2023 11:07:39 35.5N 140.7E mb=4.3 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 26MAY2023 12:01:50 35.5N 140.8E mb=4.6 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 26MAY2023 10:03:24 35.6N 140.5E Mw=6.1 EMSC NEAR EAST COAST OF HONSHU, JAP

O: 26MAY2023 10:03:24 35.6N 140.5E Mw=6.2 JMA NEAR EAST COAST OF HONSHU, JAP

O: 26MAY2023 10:03:24 35.6N 140.7E Mw=6.2 CENC NEAR EAST COAST OF HONSHU, JAP

P: 22MAY2023 153465 35.0N 142.0E 4.0-5.5 BAAAA Off East Coast Honshu

Moderately large to large earthquakes also occurred in the West Chile Rise and in the Tonga Islands with M 5.9 and 6.0 today. These events were lightly felt in their respective epicentral area but did not do any damage that was reported.

The last similar earthquake in the West Chile Rise was an M 5.8 on October 31, 2022. This summary noted this event at the time as:

"The strongest earthquake in the world today was an M 5.8-6.0 in the West Chile Rise. It was not reported felt in this remote area. This is the strongest earthquake within about 250 km of this epicenter since an M 5.9 on May 20, 2010. The only other such event in the area in the past 30 years was an M 5.8-6.0 on June 5, 2008." (November 1, 2022)

The last earthquake with M>=5.9 in the West Chile Rise within about 300 km

of today's epicenter was an M 5.9-6.0 on June 5, 2008, the only such event in the area in the past 35 years. Forecast 153609 had expected enhanced seismicity in the Chile Rise was likely around May 27.

O: 26MAY2023 22:18:25 39.1S 91.5W Mw=5.9 EMSC WEST CHILE RISE

P: 27MAY2023 153609 43.0S 83.0W 4.0-5.7 ACCAA Chile Rise

The M 6.0 in Tonga today continued activation of that area which included an M 7.6 in northern Tonga near Samoa on May 10, 2023. It is the strongest earthquake within about 150 km of this epicenter since an M 6.3 a year ago on June 4, 2022 and an M 6.5 on April 24, 2021. Forecast 153581 had expected today's event within about 100 km was likely around May 29, 2023. This epicenter is at 145 degrees from the M 7.8 in Turkey of February 6, 2023 and at 100 degrees from the M 6.7 in Colombia of May 25, 2023 and at the fifth node (72 degrees) from the M 7.0 in Java of April 14, 2023 and may have been promoted by energy from those sources.

O: 27MAY2023 00:11:01 18.4S 175.3W Mw=6.0 EMSC TONGA

P: 29MAY2023 153581 18.0S 174.0W 4.0-5.6 AAAAA Tonga Islands

The strongest earthquake in the U.S. or Canada today was an M 4.1 aftershock in the region of Northern California. NEIC reported this earthquake of M 4.1 in Northern California was felt with intensity II-III in the area(s) of Northern California in Canyon Dam and Westwood (IV) and in Chester, Greenville, Crescent Mills, Mineral, Quincy, Meadow Valley and Magalia among others.

This is the strongest aftershock of the M 5.5 in Northern California of May 11, 2023 since the M 5.2 on May 12, 2023. Forecast 153516 had expected today's event within about 10 km was likely around May 28.

O: 26MAY2023 11:37:21 40.2N 121.2W Md=2.4 EMSC NORTHERN CALIFORNIA

O: 26MAY2023 12:19:20 40.2N 121.2W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 26MAY2023 12:34:01 40.2N 121.2W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 26MAY2023 17:51:28 40.2N 121.2W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 27MAY2023 00:14:26 40.2N 121.1W MD=2.7 EMSC NORTHERN CALIFORNIA

O: 27MAY2023 04:35:26 40.2N 121.1W Md=2.3 EMSC NORTHERN CALIFORNIA

O: 26MAY2023 11:26:25 40.2N 121.2W ML=4.1 EMSC NORTHERN CALIFORNIA

P: 28MAY2023 153516 40.2N 121.2W 2.5-4.5 AAAAA Northern California

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 27MAY2023 06:00:00 28.2N 51.2E ML=4.0 EMSC SOUTHERN IRAN

P: 27MAY2023 153425 29.0N 51.0E 3.5-5.2 AAAAA So. Iran/Persian Gulf

O: 26MAY2023 12:41:57 24.5N 122.7E ML=4.0 EMSC TAIWAN REGION

O: 26MAY2023 19:56:18 23.9N 121.7E ML=4.0 TAI Hualien, Taiwan

P: 27MAY2023 153427 24.0N 123.0E 4.0-5.4 AAAAA Taiwan

CWB reported this earthquake was felt with intensity II in Hualien and I in Nantou Counties, Taiwan.

O: 26MAY2023 08:08:01 39.8N 75.1E mb=4.4 EMSC SOUTHERN XINJIANG, CHINA

P: 27MAY2023 153503 40.0N 75.0E 4.0-5.5 AAAAA Kirgizstan/Xinjiang

O: 27MAY2023 06:48:12 54.4N 163.8E mb=4.0 EMSC OFF EAST COAST OF KAMCHATKA

P: 27MAY2023 153542 55.0N 163.0E 4.0-5.7 AAAAA Komandorsky Isl

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

INDONESIA AND PHILIPPINES

O: 26MAY2023 09:37:36 2.2N 96.2E ML=4.1 EMSC SIMEULUE, INDONESIA

P: 27MAY2023 153358 2.0N 96.0E 4.0-5.7 AAAAA Nicobar Islands

O: 26MAY2023 21:34:01 5.1S 131.2E mb=5.1 EMSC BANDA SEA

P: 27MAY2023 153382 6.0S 131.0E 4.0-5.4 AAAAA West Irian, PNG

O: 27MAY2023 03:45:35 8.3S 119.7E ML=4.2 EMSC FLORES REGION, INDONESIA

P: 25MAY2023 153366 8.0S 122.0E 4.0-5.7 AABAA Flores Island area

P: 29MAY2023 153366 7.0S 121.0E 4.0-5.8 ABAAA Flores Island area

O: 27MAY2023 05:52:47 8.4N 126.6E mb=4.5 EMSC MINDANAO, PHILIPPINES

P: 26MAY2023 153351 9.0N 126.0E 4.0-5.7 AAAAA Central Philippines

O: 27MAY2023 06:00:14 9.0S 113.0E ML=4.4 EMSC SOUTH OF JAVA, INDONESIA

P: 24MAY2023 153374 9.0S 113.0E 4.0-5.6 BAAAA So. of Bali

O: 26MAY2023 21:30:22 9.6S 118.5E ML=4.1 EMSC SUMBAWA REGION, INDONESIA

P: 24MAY2023 153381 9.0S 118.0E 4.0-5.4 AAAAA Sumbawa Island area

CENTRAL AND SOUTH AMERICA

O: 27MAY2023 00:56:36 5.8N 79.7W mb=4.4 EMSC SOUTH OF PANAMA

P: 27MAY2023 153352 7.0N 78.0W 4.0-5.9 ABBAA Colombia

O: 26MAY2023 07:43:31 11.3S 79.0W ML=4.0 EMSC OFF COAST OF CENTRAL PERU

P: 23MAY2023 153371 9.0S 81.0W 4.0-5.6 BCBAA No. Peru

O: 27MAY2023 06:01:11 9.3N 75.3W mb=4.5 EMSC NEAR NORTH COAST OF COLOMBIA

P: 27MAY2023 153352 7.0N 78.0W 4.0-5.9 ACCAA Colombia

O: 26MAY2023 22:22:32 17.3N 94.7W ML=4.0 EMSC VERACRUZ, MEXICO

P: 28MAY2023 153387 17.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 26MAY2023 13:42:32 18.7S 66.9W mb=4.8 EMSC ORURO, BOLIVIA

P: 29MAY2023 153578 18.0S 69.0W 4.0-5.6 BABAA So. Peru/Bolivia

O: 27MAY2023 02:09:17 19.4N 65.7W Md=3.9 EMSC PUERTO RICO REGION

O: 27MAY2023 05:24:45 19.5N 66.3W ML=3.6 EMSC PUERTO RICO REGION

O: 27MAY2023 04:51:40 19.6N 66.3W Md=3.7 EMSC PUERTO RICO REGION

P: 23MAY2023 153395 19.0N 65.0W 3.0-5.5 BAAAA Leeward Islands

O: 26MAY2023 21:39:30 27.5N 111.5W ML=3.4 EMSC GULF OF CALIFORNIA

O: 26MAY2023 16:48:52 27.5N 111.5W ML=3.9 EMSC GULF OF CALIFORNIA

P: 30MAY2023 153415 25.0N 113.0W 3.5-5.0 BCBAA Gulf of California

AFRICA AND EUROPE

O: 26MAY2023 18:38:49 49.5N 34.1E ML=4.0 EMSC UKRAINE

SOUTHWEST PACIFIC

O: 27MAY2023 00:11:01 18.4S 175.3W Mw=6.0 EMSC TONGA

P: 29MAY2023 153581 18.0S 174.0W 4.0-5.6 AAAAA Tonga Islands

O: 26MAY2023 11:42:18 23.2S 170.7E mb=4.7 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 27MAY2023 153589 23.0S 172.0E 4.0-5.5 AAAAA Loyalty Islands

O: 27MAY2023 05:06:38 24.2S 179.7E mb=4.4 EMSC SOUTH OF FIJI ISLANDS

P: 22MAY2023 153599 24.0S 179.0E 4.0-5.5 BAAAA Tonga/Fiji

OCEAN RIDGES

O: 26MAY2023 22:18:25 39.1S 91.5W Mw=5.9 EMSC WEST CHILE RISE

P: 27MAY2023 153609 43.0S 83.0W 4.0-5.7 ACCAA Chile Rise

O: 26MAY2023 21:33:48 43.2S 39.2E mb=5.0 EMSC PRINCE EDWARD ISLANDS REGION

P: 22MAY2023 153611 41.0S 43.0E 4.0-5.8 BCCAA So. Indian 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: 26MAY2023 11:07:39 35.5N 140.7E mb=4.3 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 26MAY2023 12:01:50 35.5N 140.8E mb=4.6 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 26MAY2023 10:03:24 35.6N 140.5E Mw=6.1 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 22MAY2023 153465 35.0N 142.0E 4.0-5.5 BAAAA Off East Coast Honshu

O: 26MAY2023 14:24:57 46.2N 152.9E mb=4.5 EMSC KURIL ISLANDS

P: 24MAY2023 153527 45.0N 150.0E 3.5-5.4 ABBAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 26MAY2023 15:45:09 30.8N 116.3W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 26MAY2023 08:14:53 30.9N 116.2W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO

O: 26MAY2023 08:21:17 30.9N 116.2W ML=3.7 EMSC BAJA CALIFORNIA, MEXICO

O: 26MAY2023 08:02:37 30.8N 116.2W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 29MAY2023 153471 31.0N 116.3W 2.5-4.8 BAAAA So. California

O: 27MAY2023 05:03:42 32.1N 115.1W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO

P: 29MAY2023 153471 32.4N 115.8W 2.5-4.6 AAAAA So. California

O: 26MAY2023 08:23:15 32.7N 116.3W Ml=2.1 EMSC SOUTHERN CALIFORNIA

P: 25MAY2023 153473 33.0N 115.9W 2.5-4.6 AAAAA So. California

O: 26MAY2023 11:38:13 34.4N 116.5W ML=2.6 EMSC SOUTHERN CALIFORNIA

P: 25MAY2023 153477 34.6N 116.7W 2.5-4.9 AAAAA So. California

NEIC reported this earthquake of M 2.6 in Southern California was felt with intensity II-III in the area(s) of Southern California in Landers.

O: 27MAY2023 00:28:20 35.2N 116.9W Ml=2.1 EMSC SOUTHERN CALIFORNIA

P: 25MAY2023 153478 35.1N 117.0W 2.5-4.6 AAAAA So. California

O: 26MAY2023 10:57:23 35.3N 119.4W Ml=2.2 EMSC CENTRAL CALIFORNIA

P: 30MAY2023 153476 35.0N 119.2W 2.5-4.9 BAAAA So. California

O: 27MAY2023 00:35:51 36.1N 117.9W Ml=2.1 EMSC CENTRAL CALIFORNIA

P: 27MAY2023 153432 36.2N 117.9W 2.5-5.0 AAAAA California/Nevada area

O: 26MAY2023 09:33:16 40.4N 125.4W Ml=3.1 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 29MAY2023 153518 40.5N 125.8W 2.5-4.4 BAAAA Off Coast of No. Calif

O: 26MAY2023 23:26:30 36.8N 121.2W Md=2.2 EMSC CENTRAL CALIFORNIA

O: 26MAY2023 15:43:06 36.5N 121.1W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 25MAY2023 153440 36.7N 121.4W 2.5-4.4 AAAAA Central California

O: 26MAY2023 20:39:01 38.6N 119.8W ML=3.1 EMSC NORTHERN CALIFORNIA

O: 26MAY2023 20:45:48 38.6N 119.8W MD=2.6 EMSC NORTHERN CALIFORNIA

O: 26MAY2023 20:51:35 38.6N 119.8W MD=2.2 EMSC NORTHERN CALIFORNIA

P: 27MAY2023 153437 38.8N 119.6W 2.5-4.6 AAAAA California/Nevada area

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