Previous two summaries

TODAY IN EARTHQUAKE HISTORY

GLOBAL:

The following events of Mw>=7 have occurred on this date in recorded history:

MO DA HR MN SC YEAR LATIT LONGIT DEP MW LOCATION

5 13 0 0 00 986 36.200 43.100 0 0.0 IRAQ

Severe damage at AL-MAWSIL (MOSUL), Iraq. Many killed. MMI: VIII

5 13 0 0 0 1647 -14.000 -76.500 40 7.9 Central Peru

Severe damage at Santiago. 2000 killed.

5 13 0 0 0 1695 36.000 111.500 0 8.0 So. China

5 13 0 0 0 1717 39.000 142.700 0 7.6 Off East Coast Honshu

5 13 12 36 0 1784 -16.500 -72.000 70 8.0 So. Peru/Bolivia

Moderate damage at Arequipa, Camana, Moquegua, Peru (IX). 54 killed a tsunami was generated.

5 13 11 22 0 1897 12.300 123.300 60 7.9 Luzon, Philippines

5 13 12 30 0 1897 12.000 124.000 60 7.9 Luzon, Philippines

Severe damage (VIII) at Masbate Island.

5 13 6 34 6 1903 -17.000 168.000 60 7.9 Vanuatu Islands

5 13 4 23 00 1990 -40.300 176.100 21 6.7 NEW ZEALAND

Moderate damage (VIII) at DANNEVIRKE, WELLINGTON

TODAY IN EARTHQUAKE HISTORY

U.S./CANADA

Following are events of Mb>=5 which have occurred in this region on this date in history:

MO DA HR MN SC YEAR LATIT LONGIT DEP MW LOCATION

5 13 6 20 0 1910 33.670 -117.320 0 5.0 So. California

Lake Elsinore region. Chinmneys toppled in the district between Corona and Wildomar where rocks rolled down the hillside. Felt to Barstow, Ventura and San Diego.

5 13 7 58 6 1910 57.000 -160.000 100 6.8 Alaska Peninsula

5 13 17 15 0 1914 41.224 -111.959 0 5.7 UTah

Windows were broken and chimneys thrown down at Ogden. Probably caused by a slip in the Wasatch Fault near the Idaho line. Felt 30 miles south of Salt Lake City and over a distance of 140 miles.

5 13 2 30 0 1916 43.700 -116.200 0 5.6 Montana/Idaho

Boise ID. Strong shock. Chimneys were wrecked, and people rushed into the street. Strong at Weiser, 60 miles west. The epicenter was probably NW of Boise. Reclamation ditches were damaged and the flow of gas was altered. Felt at Loon Creek, 120 miles northeast and reported felt at Anaconda MT, 240 miles NE. Also felt in eastern Oregon.

5 13 14 6 0 1936 46.600 -112.000 0 5.7 Yellowstone/Wyoming

Felt strongly at Helena MT.

5 13 16 1 45 1941 40.000 -126.000 0 6.0 Off Coast of No. California

Felt strongly along the coast at widely separated points and at 2 towns in Oregon. Maximum intensity V. Cracked plaster at Santa Cruz. Hanging objects swung at Ferndale.

5 13 16 7 12 1960 54.960 -161.510 0 6.2 Unimak Islands, Aleutians

5 13 17 50 19 1963 61.100 -151.000 96 5.4 Central Alaska

5 13 5 18 55 1967 56.450 -152.580 23 5.2 Southern Alaska

5 13 21 27 56 1971 65.900 -164.000 100 6.1 Northern Alaska

5 13 5 10 49 1974 55.800 -158.450 36 5.0 Alaska Peninsula

5 13 14 14 55 1986 51.350 -173.470 33 5.0 Andreanoff Islands, Aleutians

5 13 17 15 23 1986 51.230 -176.680 33 5.5 Andreanoff Islands, Aleutians

5 13 4 41 31 1989 54.200 -169.400 0 5.2 Fox Islands, Aleutians

5 13 10 24 40 1993 61.988 -147.033 59 5.3 Central Alaska

5 13 11 59 49 1993 55.177 -160.458 32 6.9 Unimak Islands, Aleutians

Items knocked from shelves at Sand Point and King Cove. Felt (VI) at Sand Point; (V) at Chignik, Chignik Lagoon, False Pass, King Cove, Nelson Lagoon and Perryville; (IV) at Cold Bay and Port Heiden; (III) at Akhiok and Akutan; (II) at Kodiak.

5 13 23 41 38 1993 55.017 -160.162 33 5.3 Unimak Islands, Aleutians

5 13 23 11 5 1997 61.240 -150.847 66 5.0 Central Alaska

5 13 10 06 41 2005 18.866 -155.202 44 5.1 Hawaii

(NEIC) Felt (IV) at Captain Cook, Hilo, Honaunau, Kamuela, Keaau, Kurtistown and Pahoa; (III) at Kailua Kona and Waikoloa. Felt throughout the Island of Hawai`i.

5 13 05 35 12 2010 42.263 -126.499 10 5.3 Off Coast of Oregon

(NEIC) Felt at Brookings, Eugene, Gold Beach, Medford and Myrtle Point.

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: 11MAY2021 12:22:31 56.7N 118.0E mb=4.6 EMSC CHITINSKAYA OBLAST', RUSSIA

P: 6MAY2021 133612 57.0N 121.0E 3.0-4.4 BABAA So. Siberia

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

INDONESIA AND PHILIPPINES

O: 12MAY2021 05:39:27 1.1S 95.9E ML=4.1 EMSC SOUTHWEST OF SUMATRA, INDONESI

P: 9MAY2021 133411 1.0N 97.0E 4.0-5.7 BBAAA Nicobar Islands

O: 11MAY2021 20:44:42 1.6S 99.4E mb=4.9 EMSC KEP. MENTAWAI REGION, INDONESI

P: 7MAY2021 133412 0.0N 99.0E 4.0-5.5 BBAAA So. Sumatera

O: 11MAY2021 17:15:40 2.8N 128.2E ML=4.1 EMSC HALMAHERA, INDONESIA

O: 11MAY2021 21:11:16 2.2N 128.1E ML=4.5 EMSC HALMAHERA, INDONESIA

P: 10MAY2021 133406 4.0N 128.0E 4.0-5.4 ABAAA Halmahera

O: 11MAY2021 07:50:21 3.9N 125.9E mb=4.8 EMSC KEPULAUAN SANGIHE, INDONESIA

P: 9MAY2021 133409 3.0N 123.0E 4.0-5.7 AACAA Mindanao, Philippines

O: 11MAY2021 08:47:40 4.2N 95.9E ML=4.2 EMSC NORTHERN SUMATRA, INDONESIA

P: 9MAY2021 133411 4.0N 94.0E 4.0-5.8 AABAA Nicobar Islands

P: 13MAY2021 133726 4.0N 94.0E 4.0-5.8 AABAA Nicobar Islands

O: 11MAY2021 15:27:35 5.4S 151.0E Mw=5.4 EMSC NEW BRITAIN REGION, P.N.G.

P: 15MAY2021 133739 5.0S 151.0E 4.0-5.4 BAAAA New Ireland

O: 11MAY2021 06:33:16 5.7S 153.3E mb=4.9 EMSC NEW IRELAND REGION, P.N.G.

P: 9MAY2021 133422 4.0S 154.0E 4.0-5.4 ABAAA New Britain

O: 12MAY2021 03:02:36 6.8N 126.4E ML=4.8 EMSC MINDANAO, PHILIPPINES

P: 11MAY2021 133719 7.0N 126.0E 4.0-5.7 AAAAA Central Philippines

O: 12MAY2021 01:09:26 13.5N 120.8E Mw=5.7 EMSC MINDORO, PHILIPPINES

P: 15MAY2021 133765 12.0N 122.0E 3.5-5.1 BBAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 11MAY2021 14:41 32.7S 70.1W mb=4.4 GUC Santiago at San Bernardo, Tilt

P: 8MAY2021 133681 31.0S 72.0W 4.0-5.7 BBBAA Central Chile

GUC reported this earthquake was felt with intensity III in Santiago at San Bernardo, Tiltil; II in Paine, Pedro Aguirre Cerda and Santiago, Chile.

O: 11MAY2021 08:43:47 9.7S 75.3W ML=4.4 EMSC CENTRAL PERU

P: 12MAY2021 133741 9.0S 80.0W 4.0-5.8 AACAA No. Peru

O: 11MAY2021 08:15:30 10.0N 83.8W ML=4.0 EMSC COSTA RICA

P: 15MAY2021 133755 10.0N 84.0W 3.5-5.2 AAAAA Caribbean Sea

O: 12MAY2021 06:17:08 13.4N 90.3W Mw=5.6 EMSC OFFSHORE EL SALVADOR

O: 12MAY2021 06:18:47 13.3N 90.3W ML=4.7 EMSC OFFSHORE EL SALVADOR

P: 5MAY2021 133447 14.0N 90.0W 3.5-5.1 CAAAA Guatemala

P: 13MAY2021 133760 13.0N 91.0W 3.5-5.6 AAAAA Guatemala

O: 12MAY2021 00:37:07 13.9N 93.8W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 9MAY2021 133443 15.0N 93.0W 3.5-5.4 BBAAA Chiapas, Mexico

O: 12MAY2021 05:18:07 16.5N 95.2W ML=4.0 EMSC OAXACA, MEXICO

O: 12MAY2021 03:20:31 17.4N 94.9W ML=4.0 EMSC VERACRUZ, MEXICO

O: 12MAY2021 04:27:19 15.6N 95.0W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 13MAY2021 133757 16.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico

O: 11MAY2021 10:18:04 16.4N 98.5W ML=4.2 EMSC GUERRERO, MEXICO

P: 8MAY2021 133462 17.0N 100.0W 3.5-5.3 BABAA Oaxaca, Mexico

O: 11MAY2021 11:51:01 17.6N 65.6W Md=3.0 EMSC PUERTO RICO REGION

P: 10MAY2021 133463 18.0N 66.0W 3.4-5.0 AAAAA Puerto Rico

O: 12MAY2021 01:09:01 17.9N 67.0W ML=3.6 EMSC PUERTO RICO REGION

P: 11MAY2021 133774 18.0N 68.0W 3.4-5.3 AAAAA Puerto Rico

NEIC reported this earthquake of M 3.6 in Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico with IV at Lajas, Cabo Rojo, Aguada, and in Ensenada, San German, Las Marias, Barranquitas, San Juan and Fajardo.

O: 11MAY2021 14:46:55 21.6S 68.5W mb=4.3 EMSC ANTOFAGASTA, CHILE

O: 12MAY2021 04:23:37 22.1S 68.4W mb=4.4 EMSC ANTOFAGASTA, CHILE

P: 7MAY2021 133658 23.0S 69.0W 4.0-5.6 BBAAA Coast No. Chile

O: 11MAY2021 14:41:34 32.7S 70.1W mb=4.5 EMSC MENDOZA, ARGENTINA

P: 12MAY2021 133958 32.0S 70.0W 4.0-5.8 AAAAA Central Chile

NEIC reported this earthquake of M 4.5 in Argentina was felt with intensity II-III in the area(s) of Santiago and San Bernardo, Chile.

AFRICA AND EUROPE

O: 11MAY2021 11:35:12 35.5N 3.7W ML=3.5 EMSC STRAIT OF GIBRALTAR

O: 11MAY2021 16:52:03 35.5N 3.7W ML=3.7 EMSC STRAIT OF GIBRALTAR

P: 12MAY2021 133824 35.0N 4.0W 3.5-4.9 AAAAA Morocco/Spain

O: 12MAY2021 00:13:59 35.6N 8.9W ML=3.7 EMSC WEST OF GIBRALTAR

P: 3MAY2021 133515 37.0N 6.0W 3.5-4.9 CBBAA Morocco/Spain

O: 11MAY2021 16:28:27 36.8N 3.5E mb=3.5 EMSC NORTHERN ALGERIA

P: 7MAY2021 133551 37.0N 3.0E 3.0-4.5 BAAAA Western Mediterranean

O: 11MAY2021 10:27:46 71.1N 9.4W ML=3.4 EMSC JAN MAYEN ISLAND REGION

P: 8MAY2021 133634 71.0N 8.0W 3.5-5.4 BAAAA Jan Mayen Isl. area

O: 11MAY2021 21:31:02 40.5N 21.1E Mw=4.7 EMSC GREECE

P: 11MAY2021 133827 39.0N 20.0E 3.0-4.4 ABAAA No. Greece

SOUTHWEST PACIFIC

O: 11MAY2021 09:21:10 16.5S 177.5W mb=5.3 EMSC FIJI REGION

P: 8MAY2021 133646 16.0S 176.0W 4.0-5.7 BABAA Tonga Islands

P: 14MAY2021 133940 17.0S 177.0W 4.0-5.7 BAAAA Tonga Islands

OCEAN RIDGES

O: 11MAY2021 20:06:31 79.1N 124.9E mb=4.7 EMSC EAST OF SEVERNAYA ZEMLYA

P: 16MAY2021 133930 82.0N 119.0E 4.0-5.4 BCAAA Arctic Ocean Region

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

ZEALANDIA AND AUSTRALIA REGION

O: 11MAY2021 15:10:19 37.5S 179.7E ML=3.6 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 8MAY2021 133694 37.0S 178.0E 3.0-4.4 BABAA North Island, N.Z.

P: 14MAY2021 133961 38.0S 178.0E 3.0-4.7 BABAA North Island, N.Z.

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

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

JAPAN AND KURIL ISLANDS

O: 12MAY2021 03:46:57 32.5N 141.4E mb=4.9 EMSC IZU ISLANDS, JAPAN REGION

P: 7MAY2021 133524 32.0N 142.0E 4.0-5.6 BAAAA Off East Coast Honshu

P: 11MAY2021 133832 32.0N 142.0E 4.0-5.6 AAAAA Off East Coast Honshu

O: 11MAY2021 23:30:05 40.3N 142.2E mb=4.5 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 9MAY2021 133525 39.0N 141.0E 4.0-5.4 ABAAA Off East Coast Honshu

P: 14MAY2021 133863 41.0N 143.0E 3.5-5.4 BAAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 11MAY2021 12:53:00 32.8N 115.8W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 11MAY2021 12:59:56 32.8N 115.8W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 12MAY2021 00:10:44 32.6N 115.6W Ml=2.0 EMSC BAJA CALIFORNIA, MEXICO

O: 11MAY2021 12:40:05 32.8N 115.8W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 7MAY2021 133530 33.0N 115.9W 2.5-4.4 BAAAA So. California

P: 13MAY2021 133837 32.9N 115.6W 2.5-4.4 AAAAA So. California

O: 11MAY2021 11:48:11 34.0N 117.2W Ml=2.0 EMSC GREATER LOS ANGELES AREA, CALI

P: 5MAY2021 133535 34.1N 117.4W 2.5-4.8 CAAAA So. California

O: 11MAY2021 16:08:29 36.1N 117.8W Ml=2.2 EMSC CENTRAL CALIFORNIA

P: 9MAY2021 133491 36.2N 117.9W 2.5-5.1 AAAAA California/Nevada area

O: 11MAY2021 09:11:20 37.4N 119.6W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 BAAAA California/Nevada area

O: 12MAY2021 04:18:27 38.2N 117.9W ml=2.1 EMSC NEVADA

P: 12MAY2021 133804 37.9N 118.2W 2.5-4.5 AAAAA California/Nevada area

O: 11MAY2021 15:38:29 40.0N 122.7W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 9MAY2021 133575 40.6N 122.4W 2.5-4.4 AAAAA Northern California

ALASKA

O: 11MAY2021 10:18:12 66.9N 145.9W ml=3.0 EMSC NORTHERN ALASKA

P: 14MAY2021 133923 69.0N 144.0W 3.0-4.9 BBAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 11MAY2021 23:43:09 44.1N 130.6W ML=3.7 EMSC OFF COAST OF OREGON

P: 9MAY2021 133578 44.5N 129.8W 3.0-4.5 AAAAA Off Coast of Oregon

O: 11MAY2021 20:48:31 47.0N 122.2W Md=2.0 EMSC PUGET SOUND REGION, WASHINGTON

P: 11MAY2021 133888 47.5N 121.8W 2.0-4.1 AAAAA Washington state, U.S.

O: 10MAY2021 00:53:43 54.5N 118.5W MB=3.4 ECAN Grande Cache, AB

P: 10MAY2021 133594 56.0N 120.0W 2.0-4.1 ABAAA Alberta

ROCKY MOUNTAINS REGION

O: 11MAY2021 18:00:15 31.7N 104.4W ML=2.5 EMSC WESTERN TEXAS

O: 11MAY2021 19:07:13 31.7N 104.3W ML=3.4 EMSC WESTERN TEXAS

O: 11MAY2021 10:44:06 31.7N 104.4W ML=3.1 EMSC WESTERN TEXAS

P: 8MAY2021 133528 32.5N 103.6W 2.0-3.9 AAAAA SW U.S.A

O: 12MAY2021 02:16:37 32.0N 102.4W mb=2.4 EMSC WESTERN TEXAS

P: 8MAY2021 133528 32.5N 103.6W 2.0-3.9 BAAAA SW U.S.A

EASTERN U.S./CANADA

O: 11MAY2021 10:15:27 34.8N 97.8W ML=2.2 EMSC OKLAHOMA

O: 11MAY2021 08:21:25 35.0N 97.8W mb=2.7 EMSC OKLAHOMA

O: 11MAY2021 20:27:34 34.4N 97.4W ML=2.2 EMSC OKLAHOMA

P: 7MAY2021 133545 34.0N 97.0W 2.0-3.9 BAAAA 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 with IV in Alex, Amber, Bradley and III in Chickasha.

O: 12MAY2021 02:39:54 36.1N 92.8W mb=2.1 EMSC ARKANSAS

P: 4MAY2021 133517 35.0N 92.0W 2.0-4.2 CBAAA New Madrid area

O: 12MAY2021 01:45:39 49.5N 67.1W MB=1.5 ECAN Port-Cartier, QC

P: 5MAY2021 133558 49.0N 66.0W 2.0-3.9 AAAAA E. of Maine

O: 11MAY2021 04:37:56 47.7N 70.0W MB=1.3 ECAN Charlevoix Seismic Zone

O: 10MAY2021 13:39:08 47.4N 70.4W MB=1.9 ECAN Charlevoix Seismic Zone

O: 11MAY2021 09:45:48 47.8N 69.8W MB=1.6 ECAN Charlevoix Seismic Zone

P: 11MAY2021 133874 47.3N 70.5W 2.0-3.9 AAAAA New England

P: 13MAY2021 133868 47.0N 69.0W 2.0-3.9 AAAAA Maine

HAWAII

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

MODERATE QUAKES IN KURIL ISLANDS

EARTHQUAKE SUMMARY FOR MAY 9, 2021

It was a quiet day in global seismicity. The largest earthquakes of the day were located with M 5.0 in the Kuril Islands and Tonga. The events in the Kuril Islands were the most active in the world today with four other additional moderate quakes in the area. These were not reported felt. The M 5.0 in the Kuril Islands is the strongest in the Kurils since an M 5.1 on March 20, 2021. Forecasts 133585, 133559 and 133570 expected this activity was likely in early May.

O: 09MAY2021 16:05:00 47.4N 151.6E mb=4.4 EMSC KURIL ISLANDS

O: 9MAY2021 23:33:37 46.6N 152.1E mb=5.0 EMSC KURIL ISLANDS

P: 4MAY2021 133585 48.0N 154.0E 3.5-5.8 BABAA So. Kurils

O: 10MAY2021 00:39:51 43.9N 146.7E mb=4.5 EMSC KURIL ISLANDS

P: 8MAY2021 133559 44.0N 145.0E 3.5-5.6 AAAAA Hokkaido, Japan

O: 9MAY2021 16:23:45 49.4N 155.8E mb=4.8 EMSC KURIL ISLANDS

P: 7MAY2021 133570 49.0N 155.0E 3.5-5.8 AAAAA NE Pacific

The M 5.0 in the Tonga Islands was reported felt in that area. NEIC reported this earthquake of M 5.0 in Tonga was felt with intensity II-III in the area(s) of Tonga in Neiafu, Vavau. This area has been active in the past week and has included events of M 6.1 and 5.5 in the past week. Today's M 5.0 is not a classical aftershock of the M 6.1 on May 7 as it occurred about 400 km northeast of that event. Forecast 133647 expected the M 5.0 in Tonga today was likely around May 8.

O: 10MAY2021 01:59:17 17.8S 173.6W mb=5.0 EMSC TONGA

P: 8MAY2021 133647 18.0S 178.0W 4.0-5.7 AACAA Tonga Islands

Two light earthquakes were felt today in the Los Angeles, California area. These occurred within about half an hour of each other. These began with an M 3.2 near local solar midnight and was followed half an hour later by an M 2.5 in the Santa Monica Bay area of California. The may signal a more active period in the Los Angeles area and resembles some of the precursory activity in the area prior to the Northridge quake of January, 1994. Forecasts 133536 and 133531 expected this activity in early May in this area.

NEIC reported the earthquake of M 2.5 in Santa Monica Bay, California was felt with intensity II-III in the area(s) of Santa Monica Bay, California at Hermosa Beach, Manhattan Beach, Redondo Beach, El Segundo, Torrance, Lawndale, Hawthorne and Palos Verdes. NEIC reported the earthquake of M 3.2 in eastern Los Angeles, California was felt with intensity II-III in the area(s) of eastern Los Angeles, California at Loma Linda, Grand Terrace, Colton, Redlands, San Bernardino, Moreno Valley, Highland.

O: 9MAY2021 09:37:57 33.9N 118.5W Ml=2.5 EMSC SANTA MONICA BAY, CALIFORNIA

O: 9MAY2021 09:09:33 34.0N 117.2W ML=3.2 EMSC GREATER LOS ANGELES AREA, CALI

P: 5MAY2021 133535 34.1N 117.4W 2.5-4.8 BAAAA So. California

P: 7MAY2021 133531 33.8N 117.7W 2.5-4.7 AAAAA So. California

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 9MAY2021 18:41:23 26.8N 92.5E mb=3.8 EMSC ASSAM, INDIA

P: 3MAY2021 133478 27.0N 92.0E 4.0-5.5 CAAAA Myanmar

NEIC reported this earthquake of M 3.8 in Assam, India was felt with intensity II-III in the area(s) of Assam, India at Gauhati.

O: 10MAY2021 00:36:08 51.4N 100.4E mb=4.3 EMSC RUSSIA-MONGOLIA BORDER REGION

P: 1MAY2021 133611 51.0N 98.0E 3.0-4.7 CABAA So. Siberia

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

INDONESIA AND PHILIPPINES

O: 10MAY2021 05:38:05 0.1N 124.2E ML=4.3 EMSC MINAHASA, SULAWESI, INDONESIA

P: 9MAY2021 133398 1.0N 122.0E 4.0-5.5 AABAA Celebes Sea

O: 9MAY2021 22:14:08 0.2S 131.9E ML=4.3 EMSC NEAR N COAST OF PAPUA, INDONES

P: 6MAY2021 133435 1.0S 133.0E 4.0-5.5 BAAAA West Irian, PNG

O: 9MAY2021 19:08:15 1.6N 126.3E ML=4.3 EMSC MOLUCCA SEA

P: 3MAY2021 133406 1.0N 128.0E 4.0-5.5 CABAA Halmahera

O: 9MAY2021 17:51:41 2.4S 138.4E ML=4.2 EMSC PAPUA, INDONESIA

P: 10MAY2021 133436 3.0S 139.0E 4.0-5.5 AAAAA West Irian, PNG

O: 9MAY2021 20:22:44 4.9S 153.6E mb=4.5 EMSC NEW IRELAND REGION, P.N.G.

P: 9MAY2021 133422 4.0S 154.0E 4.0-5.4 AAAAA New Britain

O: 10MAY2021 04:18:47 6.0N 126.2E ML=4.8 EMSC MINDANAO, PHILIPPINES

P: 10MAY2021 133401 7.0N 126.0E 4.0-5.7 AAAAA Central Philippines

O: 9MAY2021 18:09:28 7.7S 107.3E ML=4.3 EMSC JAVA, INDONESIA

P: 7MAY2021 133645 10.0S 107.0E 4.0-5.6 ACAAA So. of Java

O: 9MAY2021 14:14:12 7.9N 127.0E ML=4.6 EMSC MINDANAO, PHILIPPINES

P: 10MAY2021 133401 7.0N 126.0E 4.0-5.7 AAAAA Central Philippines

O: 9MAY2021 09:42:47 10.9S 114.9E mb=4.6 EMSC SOUTH OF BALI, INDONESIA

P: 7MAY2021 133430 9.0S 114.0E 4.0-5.6 ABAAA So. of Bali

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

CENTRAL AND SOUTH AMERICA

O: 10MAY2021 04:46:15 16.7N 95.4W ML=4.0 EMSC OAXACA, MEXICO

P: 5MAY2021 133444 16.0N 95.0W 3.5-5.1 BAAAA Chiapas, Mexico

O: 09MAY2021 18:55:42 14.7N 93.4W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

O: 9MAY2021 11:57:00 14.2N 93.4W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 9MAY2021 133443 15.0N 93.0W 3.5-5.4 AAAAA Chiapas, Mexico

O: 10MAY2021 06:30:15 8.3S 76.4W ML=4.3 EMSC CENTRAL PERU

P: 1MAY2021 133426 6.0S 76.0W 4.0-5.4 CCAAA No. Peru

P: 8MAY2021 133427 6.0S 79.0W 4.0-5.5 ACCAA No. Peru

O: 9MAY2021 21:58:04 7.8S 74.3W ML=4.0 EMSC NORTHERN PERU

P: 1MAY2021 133415 8.0S 74.0W 3.5-5.1 CAAAA Brazil

O: 9MAY2021 19:28:32 4.0N 71.5W mb=4.5 EMSC COLOMBIA

P: 9MAY2021 133402 7.0N 73.0W 4.0-5.4 ACBAA Colombia

O: 9MAY2021 10:52:21 18.1N 71.4W ML=3.6 EMSC DOMINICAN REPUBLIC

P: 7MAY2021 133469 20.0N 71.0W 3.0-4.9 ABAAA Bahamas/No. Caribbean

O: 9MAY2021 15:46:01 18.8N 103.8W ML=4.0 EMSC COLIMA, MEXICO

O: 9MAY2021 14:44:32 27.8S 71.4W mb=4.4 EMSC OFFSHORE ATACAMA, CHILE

P: 7MAY2021 133656 29.0S 71.0W 4.0-5.5 ABAAA Coast Central Chile

AFRICA AND EUROPE

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

SOUTHWEST PACIFIC

O: 10MAY2021 06:39:37 14.8S 167.8E mb=4.4 EMSC VANUATU

P: 6MAY2021 133649 15.0S 167.0E 4.0-5.4 BAAAA Vanuatu Islands

O: 10MAY2021 01:59:17 17.8S 173.6W mb=5.0 EMSC TONGA

P: 8MAY2021 133647 18.0S 178.0W 4.0-5.7 AACAA Tonga Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 9MAY2021 20:32:14 45.5S 167.1E ML=4.2 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 09MAY2021 20:32:13 45.4S 167.0E MS=4.4 GEONET Felt with weak intensity

P: 4MAY2021 133707 46.0S 167.0E 3.0-5.1 BAAAA Southern S. Isl. N.Z.

GEONET reported this earthquake was felt with weak intensity in the area southwest of Haast, South Island. 17 reports of felt intensity came from the area east and north of the epicenter. More than 17 people reported feeling this earthquake with 17 reporting weak shaking and 0 light intensity; 0 with moderate intensity and none each with strong, severe and none with extreme shaking.

JAPAN AND KURIL ISLANDS

O: 09MAY2021 16:05:00 47.4N 151.6E mb=4.4 EMSC KURIL ISLANDS

O: 9MAY2021 23:33:37 46.6N 152.1E mb=5.0 EMSC KURIL ISLANDS

P: 4MAY2021 133585 48.0N 154.0E 3.5-5.8 BABAA So. Kurils

O: 10MAY2021 00:39:51 43.9N 146.7E mb=4.5 EMSC KURIL ISLANDS

P: 8MAY2021 133559 44.0N 145.0E 3.5-5.6 AAAAA Hokkaido, Japan

O: 9MAY2021 16:23:45 49.4N 155.8E mb=4.8 EMSC KURIL ISLANDS

P: 7MAY2021 133570 49.0N 155.0E 3.5-5.8 AAAAA NE Pacific

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 10MAY2021 04:34:47 32.6N 115.6W Ml=2.0 EMSC BAJA CALIFORNIA, MEXICO

O: 10MAY2021 01:20:25 32.6N 115.6W Ml=2.1 EMSC BAJA CALIFORNIA, MEXICO

P: 7MAY2021 133530 33.0N 115.9W 2.5-4.4 BAAAA So. California

O: 9MAY2021 09:37:57 33.9N 118.5W Ml=2.5 EMSC SANTA MONICA BAY, CALIFORNIA

O: 9MAY2021 09:09:33 34.0N 117.2W ML=3.2 EMSC GREATER LOS ANGELES AREA, CALI

P: 5MAY2021 133535 34.1N 117.4W 2.5-4.8 BAAAA So. California

P: 7MAY2021 133531 33.8N 117.7W 2.5-4.7 AAAAA So. California

O: 09MAY2021 19:26:11 38.2N 118.0W ML=3.1 EMSC NEVADA

O: 09MAY2021 19:26:11 38.2N 118.0W ML=3.6 ANSS NEVADA

O: 09MAY2021 22:54:40 38.2N 118.0W ml=2.2 EMSC NEVADA

O: 9MAY2021 09:33:24 38.1N 118.8W Md=2.2 EMSC CENTRAL CALIFORNIA

O: 09MAY2021 13:16:14 38.1N 118.8W ML=3.1 EMSC CENTRAL CALIFORNIA

P: 7MAY2021 133494 38.3N 119.3W 2.5-4.6 AAAAA California/Nevada area

NEIC reported this earthquake of M 3.6 in Western Nevada was felt with intensity II-III in the area(s) of Western Nevada in Silver Springs, Glenbrook, Reno and in Auburn, California.

O: 9MAY2021 16:56:26 38.2N 117.9W ml=2.4 EMSC NEVADA

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 AAAAA California/Nevada area

O: 10MAY2021 00:19:50 39.2N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 10MAY2021 133501 38.5N 122.7W 2.5-4.6 AAAAA Central California

O: 10MAY2021 01:18:18 39.4N 123.3W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 9MAY2021 133502 39.7N 123.7W 2.5-4.4 AAAAA Central California

ALASKA

O: 9MAY2021 19:43:45 54.2N 162.8W ML=3.3 EMSC ALASKA PENINSULA

P: 5MAY2021 133614 54.5N 161.8W 3.5-5.3 BAAAA Unimak Islands, Aleutians

O: 9MAY2021 07:04:29 55.9N 153.1W ML=3.1 EMSC SOUTH OF ALASKA

P: 5MAY2021 133626 54.9N 149.8W 3.0-4.6 BABAA Northern Alaska

O: 9MAY2021 23:33:59 56.2N 158.0W ML=3.4 EMSC ALASKA PENINSULA

P: 9MAY2021 133593 54.8N 158.7W 3.5-5.1 ABAAA Alaska Peninsula

O: 9MAY2021 15:03:35 62.6N 152.1W ML=3.4 EMSC CENTRAL ALASKA

P: 5MAY2021 133620 62.7N 151.6W 3.2-5.0 BAAAA Central Alaska

O: 9MAY2021 19:31:40 67.6N 159.0W ML=3.1 EMSC NORTHERN ALASKA

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 9MAY2021 19:23:40 47.5N 122.6W Ml=2.5 EMSC SEATTLE-TACOMA AREA, WASHINGTO

P: 4MAY2021 133589 48.4N 123.2W 2.0-4.1 BAAAA Washington state, U.S.

ROCKY MOUNTAINS REGION

O: 09MAY2021 15:00:09 31.7N 104.6W ML=2.9 EMSC WESTERN TEXAS

O: 9MAY2021 07:47:30 31.7N 104.4W mb=2.8 EMSC WESTERN TEXAS

P: 5MAY2021 133528 32.0N 104.6W 2.0-3.9 BAAAA SW U.S.A

P: 8MAY2021 133528 32.5N 103.6W 2.0-3.9 AAAAA SW U.S.A

EASTERN U.S./CANADA

O: 10MAY2021 06:04:10 34.0N 97.3W ML=2.7 EMSC OKLAHOMA

P: 7MAY2021 133545 34.0N 97.0W 2.0-3.9 BAAAA Southeast U.S.

O: 9MAY2021 10:43:53 38.7N 97.0W mb=2.5 EMSC KANSAS

P: 4MAY2021 133547 39.0N 99.0W 2.0-4.3 BABAA Southern Plains

O: 9MAY2021 06:36:44 48.8N 67.9W MB=1.8 ECAN Saint-Damase, QC

P: 5MAY2021 133558 49.0N 66.0W 2.0-3.9 BABAA E. of Maine

HAWAII

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

MODERATE QUAKE SHAKES YUKON TERRITORY, CANADA

EARTHQUAKE SUMMARY FOR MAY 8, 2021

The strongest earthquake in the U.S. or Canada today was an M 4.6-4.9 in the Yukon Territory, Canada. This is the strongest earthquake within about 250 km of this epicenter since an M 5.3 about 250 km northwest of today's epicenter occurred on February 13. 2017. An M 6.0 hit about 100 km south of this on July 17, 2014. Forecast 133621 had expected elevated seismicity in this region was likely around May 6. This earthquake was located at the seventh node (51.4 degrees) from the M 7.1, 7.2 and 6.8 in Honshu Japan in March and April and was probably promoted by energy from those sources. It is also located at 104 degrees from the M 7.3 off North Island, New Zealand of March 4 and was probably promoted by energy from that source.

O: 9MAY2021 02:03:44 61.4N 141.0W MB=4.6 ECAN BEAVER CREEK, YT

O: 9MAY2021 02:03:46 61.5N 140.6W mb=4.9 EMSC SOUTHERN YUKON TERRITORY, CANA

O: 9MAY2021 02:03:46 61.5N 140.5W mb=4.9 ANSS SOUTHERN YUKON TERRITORY, CANA

P: 6MAY2021 133621 62.8N 143.8W 3.2-5.3 BBBAA Central Alaska

The strongest earthquake in the U.S. or Canada today outside Alaska was and M 4.4 in western Nevada. NEIC reported it was felt with intensity II-III in Nevada at Glenbrook and Fallon and in Carson City. A similar M 4.4 occurred about 25 km west of this on March 30, 2021 but the last event in the area of larger magnitude was an M 4.7 on December 14, 2020. Forecast 133495 expected enhanced activity in this area was likely around May 4 to May 7, 2021. This event is located at the fourth node (90 degrees) from the M 7.7 in the Loyalty Islands of February 10 and at the fifth node (72 degrees) recent major events off eastern Honshu, Japan and was probably promoted by energy from those sources.

O: 08MAY2021 13:07:02 38.2N 117.9W ml=2.3 EMSC NEVADA

O: 08MAY2021 15:31:26 38.2N 117.9W ml=2.0 EMSC NEVADA

O: 8MAY2021 08:13:52 38.2N 117.9W Mw=4.1 EMSC NEVADA

O: 8MAY2021 08:13:52 38.2N 117.9W Mw=4.4 ANSS NEVADA

P: 4MAY2021 133495 38.0N 118.8W 2.5-4.6 BAAAA California/Nevada area

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 AAAAA California/Nevada area

An M 3.8 also occurred today off the coast of Oregon. It may have been felt lightly on the coast of Oregon at Hillsboro. This continues the enhanced seismicity in this area which began with an M 4.1 on April 26, 2021 with an M 5.4, 5.3 and 5.2 on April 29. Forecast 133578 expected this event was likely around 133578 around May 9.

O: 8MAY2021 08:37:00 44.2N 129.2W mb=3.8 EMSC OFF COAST OF OREGON

P: 9MAY2021 133578 44.5N 129.8W 3.0-4.5 AAAAA Off Coast of Oregon

The strongest earthquake in the world today was an M 5.1 in the South Sandwich Islands. It was not reported felt in this remote region. While earthquakes of M 5.0 and M 5.3 occurred about 200 km southeast of this on May 7 and April 26, 2021, the last event of M>=5.1 within this distance of today's epicenter occurred on February 23, 2021 with M 5.2. The last of significantly large magnitude in this area was an M 5.4 on May 8, 2020 exactly one year ago. Forecast 133712 had expected today's event within about 50 km in early May.

O: 8MAY2021 18:17:38 55.6S 29.2W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION

P: 3MAY2021 133712 55.0S 29.0W 4.0-6.0 BAAAA So. Sandwich Islands

P: 9MAY2021 133712 57.0S 27.0W 4.0-6.0 ABBAA So. Sandwich Islands

An earthquake of M 4.5 continued the aftershocks in Gabon, West Africa today.

NEIC reported this earthquake of M 4.5 in Lambarene, Gabon was felt with intensity II-III in the area(s) of Lambarene, Gabon. The mainshocks in this area were an 5.2 on March 6 and an M 5.4 on March 9, 2021. Aftershocks of M 5.4 and 4.7 occurred on April 27. At the time this summary noted in this regard:

"A pair of moderate aftershocks occurred in the region of Gabon, West Africa today. These are aftershocks of the M 5.2 and 5.4 in the area of March 6 and 9, 2021 and are the largest since those events occurred. They occurred near local solar midnight and may have been promoted by high tidal stresses with the full moon. The activity in Gabon is near 144 degrees from the M 8.1 in the Kermadec Islands of March 5 and is probably promoted by energy from that source." (April 26, 2021)

O: 9MAY2021 01:30:07 1.2S 10.1E mb=4.5 EMSC GABON

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 8MAY2021 07:50:19 24.3N 77.6E ML=4.3 EMSC MADHYA PRADESH, INDIA

P: 5MAY2021 133511 30.0N 79.0E 3.8-5.3 BCBAA India

O: 8MAY2021 21:46:40 29.8N 50.5E mb=4.2 EMSC SOUTHERN IRAN

P: 2MAY2021 133483 29.0N 53.0E 3.5-5.0 CABAA So. Iran/Persian Gulf

NEIC reported this earthquake of M 4.2 in Iran was felt with intensity II-III in the area(s) of Iran at Bandar-e Genaveh.

O: 9MAY2021 01:53:36 37.2N 71.7E mb=4.4 EMSC TAJIKISTAN

P: 7MAY2021 133509 37.0N 72.0E 3.8-5.4 AAAAA Hindu Kush/Pakistan

O: 8MAY2021 14:07:32 41.2N 84.0E mb=4.3 EMSC SOUTHERN XINJIANG, CHINA

P: 5MAY2021 133563 42.0N 83.0E 4.0-5.4 BAAAA Kirgizstan/Xinjiang

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

INDONESIA AND PHILIPPINES

O: 9MAY2021 03:19:27 3.9S 131.2E mb=4.4 EMSC CERAM SEA, INDONESIA

P: 6MAY2021 133435 3.0S 134.0E 4.0-5.6 BACAA West Irian, PNG

O: 8MAY2021 11:29:31 4.2S 102.4E mb=4.4 EMSC SOUTHERN SUMATRA, INDONESIA

P: 9MAY2021 133431 5.0S 102.0E 4.0-5.6 AAAAA So. of Sumatera

O: 8MAY2021 15:42:26 4.4S 138.9E ML=4.3 EMSC PAPUA, INDONESIA

P: 9MAY2021 133429 4.0S 141.0E 4.0-5.4 AABAA Papua New Guinea

P: 10MAY2021 133436 3.0S 139.0E 4.0-5.5 ABAAA West Irian, PNG

O: 9MAY2021 05:42:36 6.2S 154.6E mb=4.9 EMSC BOUGAINVILLE REGION, P.N.G.

P: 5MAY2021 133432 7.0S 155.0E 4.0-5.4 BAAAA Solomon Islands

P: 9MAY2021 133422 4.0S 154.0E 4.0-5.4 ACAAA New Britain

O: 8MAY2021 07:47:03 6.8S 130.0E mb=4.4 EMSC BANDA SEA

P: 9MAY2021 133438 6.0S 130.0E 4.0-5.6 AAAAA West Irian, PNG

O: 8MAY2021 08:38:38 8.6N 126.8E mb=4.5 EMSC MINDANAO, PHILIPPINES

P: 5MAY2021 133407 8.0N 127.0E 4.0-5.7 BAAAA Halmahera

O: 9MAY2021 04:19:06 8.6S 118.4E ML=4.2 EMSC SUMBAWA REGION, INDONESIA

P: 8MAY2021 133434 9.0S 118.0E 4.0-5.4 AAAAA Sumbawa Island area

O: 8MAY2021 17:01:57 24.7S 177.6W mb=4.7 EMSC SOUTH OF FIJI ISLANDS

P: 7MAY2021 133675 25.0S 177.0W 4.0-5.6 AAAAA Tonga Islands

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

CENTRAL AND SOUTH AMERICA

O: 8MAY2021 19:42:03 8.9S 80.1W mb=4.8 EMSC OFF COAST OF NORTHERN PERU

P: 3MAY2021 133427 9.0S 81.0W 4.0-5.8 BAAAA No. Peru

O: 08MAY2021 18:59:50 15.5N 95.2W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 08MAY2021 21:15:15 15.7N 94.4W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

O: 8MAY2021 15:06:31 15.2N 94.2W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 9MAY2021 133443 15.0N 93.0W 3.5-5.4 AAAAA Chiapas, Mexico

O: 8MAY2021 12:31:28 15.8N 60.9W mb=4.0 EMSC GUADELOUPE REGION, LEEWARD ISL

P: 9MAY2021 133449 15.0N 60.0W 3.0-5.0 AAAAA Leeward Islands

O: 8MAY2021 12:38:19 16.2N 100.3W ML=4.2 EMSC OFFSHORE GUERRERO, MEXICO

P: 6MAY2021 133461 16.0N 100.0W 3.5-5.3 AAAAA Oaxaca, Mexico

P: 8MAY2021 133462 17.0N 100.0W 3.5-5.3 AAAAA Oaxaca, Mexico

O: 8MAY2021 21:52:16 18.0N 103.6W ML=4.1 EMSC OFFSHORE MICHOACAN, MEXICO

P: 5MAY2021 133454 18.0N 104.0W 3.5-5.6 BAAAA Michoacan, Mexico

O: 09MAY2021 01:45:37 18.0N 67.0W Md=3.0 EMSC PUERTO RICO REGION

O: 09MAY2021 05:34:49 18.0N 67.0W Md=3.0 EMSC PUERTO RICO REGION

O: 9MAY2021 01:27:13 17.9N 67.0W Md=3.0 EMSC PUERTO RICO REGION

O: 8MAY2021 16:55:29 18.9N 67.5W Md=3.1 EMSC PUERTO RICO REGION

P: 7MAY2021 133464 18.0N 69.0W 3.4-5.3 AABAA Puerto Rico

O: 09MAY2021 06:24:28 18.2N 68.3W ML=3.0 EMSC MONA PASSAGE, DOMINICAN REPUBLIC

O: 08MAY2021 12:45:44 18.8N 68.0W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

O: 9MAY2021 04:14:45 19.1N 67.3W ML=3.3 EMSC PUERTO RICO REGION

P: 5MAY2021 133469 20.0N 68.0W 3.0-4.7 BAAAA Bahamas/No. Caribbean

AFRICA AND EUROPE

O: 9MAY2021 01:30:07 1.2S 10.1E mb=4.5 EMSC GABON

O: 8MAY2021 11:41:44 36.5N 27.2E mb=4.3 EMSC DODECANESE IS.-TURKEY BORDER R

P: 6MAY2021 133488 37.0N 27.0E 3.0-4.8 AAAAA Aegean Sea

NEIC reported this earthquake of M 4.3 in the Dodecanese Islands was felt with intensity II-III in the area(s) of the Dodecanese Islands at Kardamaina.

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

SOUTHWEST PACIFIC

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

OCEAN RIDGES

O: 8MAY2021 18:17:38 55.6S 29.2W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION

P: 3MAY2021 133712 55.0S 29.0W 4.0-6.0 BAAAA So. Sandwich Islands

P: 9MAY2021 133712 57.0S 27.0W 4.0-6.0 ABBAA So. Sandwich Islands

ZEALANDIA AND AUSTRALIA REGION

O: 8MAY2021 13:05:45 38.5S 175.9E ML=3.6 EMSC NORTH ISLAND OF NEW ZEALAND

P: 4MAY2021 133696 39.0S 176.0E 3.0-4.5 BAAAA North Island, N.Z.

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

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

JAPAN AND KURIL ISLANDS

O: 8MAY2021 16:57:28 36.6N 141.8E mb=4.4 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 6MAY2021 133525 38.0N 142.0E 4.0-5.5 ABAAA Off East Coast Honshu

O: 8MAY2021 12:07:39 32.0N 140.5E mb=4.7 EMSC IZU ISLANDS, JAPAN REGION

P: 7MAY2021 133524 32.0N 142.0E 4.0-5.6 AAAAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 08MAY2021 13:07:02 38.2N 117.9W ml=2.3 EMSC NEVADA

O: 08MAY2021 15:31:26 38.2N 117.9W ml=2.0 EMSC NEVADA

O: 8MAY2021 08:13:52 38.2N 117.9W Mw=4.1 EMSC NEVADA

O: 8MAY2021 08:13:52 38.2N 117.9W Mw=4.4 ANSS NEVADA

P: 4MAY2021 133495 38.0N 118.8W 2.5-4.6 BAAAA California/Nevada area

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 AAAAA California/Nevada area

O: 08MAY2021 22:28:11 32.6N 115.3W Ml=2.2 EMSC BAJA CALIFORNIA, MEXICO

O: 8MAY2021 17:39:42 32.6N 115.3W Ml=2.1 EMSC BAJA CALIFORNIA, MEXICO

P: 7MAY2021 133530 33.0N 115.9W 2.5-4.4 AAAAA So. California

O: 9MAY2021 01:55:39 33.8N 118.4W ML=3.4 EMSC GREATER LOS ANGELES AREA, CALI

P: 4MAY2021 133534 34.3N 118.5W 2.5-5.2 BAAAA So. California

NEIC reported this earthquake of M 3.5 in Santa Monica, California was felt with intensity II-III in the area(s) of Santa Monica, California in Hermosa Beach (IV), Manhattan Beach, Redondo Beach, Torrance, El Segundo, Lawndale, Palos Verdes, and Hawthorne.

O: 8MAY2021 17:01:49 34.3N 116.4W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 9MAY2021 133538 35.1N 117.0W 2.5-4.8 AAAAA So. California

O: 9MAY2021 02:04:40 36.0N 117.8W Ml=2.1 EMSC CENTRAL CALIFORNIA

P: 9MAY2021 133491 36.2N 117.9W 2.5-5.1 AAAAA California/Nevada area

O: 9MAY2021 06:34:16 37.3N 120.0W Md=2.6 EMSC CENTRAL CALIFORNIA

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 AABAA California/Nevada area

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 Atwater.

O: 8MAY2021 07:04:42 37.3N 121.7W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 7MAY2021 133500 37.4N 121.8W 2.5-4.6 AAAAA Central California

O: 9MAY2021 04:06:26 37.8N 122.7W Md=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 8MAY2021 133500 37.8N 122.6W 2.5-4.6 AAAAA Central California

O: 9MAY2021 02:18:29 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 9MAY2021 133501 38.7N 122.7W 2.5-4.6 AAAAA Central California

O: 8MAY2021 08:29:09 40.4N 124.4W ML=2.1 EMSC NORTHERN CALIFORNIA

P: 8MAY2021 133576 40.6N 124.9W 2.5-4.6 AAAAA Off Coast of No. Calif

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

ALASKA

O: 8MAY2021 11:44:59 60.2N 153.2W ML=3.1 EMSC SOUTHERN ALASKA

P: 4MAY2021 133619 60.2N 153.2W 3.2-4.9 CAAAA Central Alaska

O: 8MAY2021 19:49:22 60.3N 151.1W ML=3.6 EMSC KENAI PENINSULA, ALASKA

P: 2MAY2021 133620 60.5N 151.5W 3.2-4.9 CAAAA Central Alaska

NEIC reported this earthquake of M 3.4 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Clam Gulch.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 8MAY2021 08:37:00 44.2N 129.2W mb=3.8 EMSC OFF COAST OF OREGON

P: 9MAY2021 133578 44.5N 129.8W 3.0-4.5 AAAAA Off Coast of Oregon

O: 9MAY2021 02:03:44 61.4N 141.0W MB=4.6 ECAN BEAVER CREEK, YT

O: 9MAY2021 02:03:46 61.5N 140.6W mb=4.9 EMSC SOUTHERN YUKON TERRITORY, CANA

P: 6MAY2021 133621 62.8N 143.8W 3.2-5.3 BBBAA Central Alaska

ROCKY MOUNTAINS REGION

O: 08MAY2021 16:26:01 31.7N 104.3W mb=2.9 EMSC WESTERN TEXAS

O: 09MAY2021 06:10:35 31.7N 104.4W mb=3.0 EMSC WESTERN TEXAS

O: 8MAY2021 21:03:02 31.6N 104.4W mb=3.1 EMSC WESTERN TEXAS

P: 5MAY2021 133528 32.0N 104.6W 2.0-3.9 BAAAA SW U.S.A

P: 8MAY2021 133528 32.5N 103.6W 2.0-3.9 AAAAA SW U.S.A

NEIC reported this earthquake of M 3.1 in New Mexico was felt with intensity II-III in the area(s) of New Mexico at Carlsbad and in western Texas at Salt Flat and Pecos.

O: 8MAY2021 09:21:59 44.5N 115.2W Ml=3.0 EMSC SOUTHERN IDAHO

P: 9MAY2021 133566 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 8MAY2021 21:14:20 35.9N 84.0W Md=2.2 EMSC EASTERN TENNESSEE

P: 2MAY2021 133512 35.0N 84.0W 2.0-4.0 CAAAA Kentucky/Tennessee/NC

P: 9MAY2021 133544 34.0N 85.0W 2.0-3.9 ABAAA Southeast U.S.

O: 08MAY2021 17:04:55 38.7N 97.0W mb=3.2 EMSC KANSAS

O: 8MAY2021 11:04:43 38.7N 97.0W mb=3.2 EMSC KANSAS

P: 4MAY2021 133547 39.0N 99.0W 2.0-4.3 BABAA Southern Plains

NEIC reported these earthquakes of M 3.2 and M 3.1 in Kansas was felt with intensity III-IV in the area(s) of Kansas at Herington and Hope.

HAWAII

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

STRONG FIJI QUAKE PROMOTED BY LARGEST FLARE IN HALF A YEAR

EARTHQUAKE SUMMARY FOR MAY 7, 2021

The largest earthquake in the world today was an M 6.1 near the geomagnetic equator in Fiji. This event followed the strongest solar flare observed by SWPC since an M4.4 on November 29, 2020 and was measured by SWPC at M3.9. The parameters for this flare given by SWPC are:

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

#-------------------------------------------------------------------------------

640 1843 1904 1919 M3.9 (May 7, 2021) 4.5E-02

The earthquake of M 6.1 in Fiji occurred within minutes of local solar noon a time when solar and tidal effects are maximized and was probably triggered by the M3.9 flare. Forecast 133647 expected today's event in Fiji was likely within about 100 km around May 8. An M 6.5 occurred within about 150 km of this epicenter on April 24, 2021 (also near local solar noon) with the previous such quake of M 6.1 on November 11, 2019. When the M 6.5 occurred in late April, this summary noted in this regard:

"The strongest earthquake in the world today was an M 6.5 in Central Tonga. NEIC reported it was felt with intensity VI in Tofoa-Koloua, Tonga and II in Neiafu, Vavau, Tonga. The last earthquake with M>=6.5 in the world was an M 6.6 on April 3, 2021 in the South Atlantic. The only other event of this magnitude or greater in the world in the past month was an M 6.5 aftershock in the Kermadec Islands aon April 1, 2021. This earthquake occurred near local solar noon in an area near the regional geomagnetic equator. It was preceded about an hour earlier by an M 5.3 about 150 km to the south, an earthquake which occurred within about 30 minutes of local solar noon. It was probably promoted effects from the strong geomagnetic storm and solar flares of the past several days which maximize near this hour. The M 6.5 is the strongest earthquake within about 250 km of this epicenter since an M 6.6 on November 4, 2019." (April 24, 2021)

O: 7MAY2021 23:35:15 18.9S 177.6W Mw=6.1 EMSC FIJI REGION

P: 8MAY2021 133647 18.0S 178.0W 4.0-5.7 AAAAA Tonga Islands

The series of moderate earthquakes of the past several days in California continued today. Moderate earthquakes in the northern Gulf of California and Baja California continued with a series of events of M 3.5-4.2 today. This summary reported in the previous issue on this series as:

"A pair of moderate earthquakes of M 4.1 and 4.2 also occurred in the Gulf of California today. Earthquakes of M>=4.2 have most recently occurred within about 100 km of these epicenters on April 1, 2021 (M 4.7) and February 13, 2020 (M 4.3). Forecast 133527 had expected this activity within about 25 km was likely to occur in early May." (May 6-7, 2021)

Moderate activity in this region can precede enhanced regional seismicity in Southern California within days as stresses migrate to the northwest.

O: 07MAY2021 08:53:20 30.1N 113.9W ML=4.0 EMSC GULF OF CALIFORNIA

O: 07MAY2021 08:58:35 30.1N 113.8W ML=3.8 EMSC GULF OF CALIFORNIA

O: 07MAY2021 09:00:14 30.1N 113.7W ML=3.9 EMSC GULF OF CALIFORNIA

O: 07MAY2021 09:27:03 30.1N 113.9W ML=3.8 EMSC GULF OF CALIFORNIA

O: 7MAY2021 08:49:02 30.0N 114.0W ML=4.1 EMSC GULF OF CALIFORNIA

P: 1MAY2021 133527 30.2N 114.1W 2.0-4.1 BAAAA SW U.S.A

An earthquake of M 6.0 in the Macquarie Islands today followed an M 5.4 to the southeast of this on May 5. This summary noted that event at the time as:

An "M 5.4 in the area west of the Macquarie Island area and an M 5.1 in the

Southwest Indian Ridge. An M 6.1 hit the area west of Macquarie Island on March 20, 2021 about 400 km southeast of today's epicenter but the last of similar or larger magnitude within about 200 km of today's epicenter occurred as an M 5.7 on November 8, 2016 and prior to that as an M 5.5 on December 24, 2014. The antipode of this event is at 57N 33W in the Reykjanes Ridge in the north Atlantic Ridge south of Iceland. Some seismic enhancement in this region is possible following today's event in the Macquarie Island area." (May 6, 2021)

O: 7MAY2021 15:21:14 54.5S 144.1E Mw=6.0 EMSC WEST OF MACQUARIE ISLAND

A moderate sized earthquake in the Northern Mid-Atlantic today of M 5.5 did occur along with today's M 6.0 in the Macquarie Islands. It was located east of The Leeward Islands in the eastern Caribbean. This is among the largest earthquakes in this area of the North Atlantic (within about 200 km) in the past 30 years. A set of three moderate to large quakes last hit the area in November, 2018 which included the largest event in this area in the past 30 years and were the last events of M>=5.5 in the area. Forecast 133455 had expected activity in this area of the North Atlantic Ridge was likely around May 8.

O: 7MAY2021 11:45:25 14.1N 48.3W Mw=5.5 EMSC NORTH ATLANTIC OCEAN

P: 8MAY2021 133455 15.0N 46.0W 4.0-5.5 AABAA Mid-Atlantic Ridge

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 07MAY2021 21:24:16 22.7N 120.8E mb=4.5 EMSC TAIWAN

O: 7MAY2021 21:24:14 22.7N 120.8E ML=4.6 TAI Hualien, Taiwan

O: 8MAY2021 01:04:32 22.7N 120.8E ML=4.3 TAI Hualien, Taiwan

P: 7MAY2021 133484 22.0N 121.0E 4.0-5.7 AAAAA Taiwan

NEIC reported this earthquake of M 4.5 in Taiwan was felt with intensity II-III in the area(s) of Taiwan at Kaohsiung

CWB reported the M 4.6 was felt with intensity III in Pingtung; II in Taitung, Kaohsiung, and I in Tainan, Hualien, Chiayi and Yunlin Counties, Taiwan.

O: 8MAY2021 04:35:02 23.9N 121.5E ML=4.0 EMSC TAIWAN

O: 8MAY2021 04:35:02 23.9N 121.4E ML=4.0 TAI Hualien, Taiwan

P: 8MAY2021 133485 24.0N 123.0E 4.0-5.4 AAAAA Taiwan

CWB reported the M 4.0 to the north was reported with intensity IV in Hualien, II in Tantou, Taichung and I in Yilan and Taitung.

O: 7MAY2021 07:56:43 38.7N 70.4E mb=4.3 EMSC TAJIKISTAN

P: 7MAY2021 133509 37.0N 72.0E 3.8-5.4 ABAAA Hindu Kush/Pakistan

O: 7MAY2021 12:44:50 29.6N 50.6E mb=4.6 EMSC SOUTHERN IRAN

P: 2MAY2021 133483 29.0N 53.0E 3.5-5.0 BABAA So. Iran/Persian Gulf

O: 7MAY2021 19:48:43 34.8N 46.7E mb=4.4 EMSC WESTERN IRAN

P: 5MAY2021 133542 33.0N 46.0E 3.8-5.5 ABAAA So. Iran

O: 8MAY2021 02:53:52 43.3N 80.8E mb=4.0 EMSC KAZAKHSTAN-XINJIANG BORDER REG

P: 5MAY2021 133563 42.0N 83.0E 4.0-5.4 BBBAA Kirgizstan/Xinjiang

O: 7MAY2021 20:18:37 38.2N 38.7E ML=4.0 EMSC EASTERN TURKEY

P: 6MAY2021 133549 38.0N 39.0E 3.5-5.2 AAAAA Turkey

INDONESIA AND PHILIPPINES

O: 07MAY2021 07:42:16 1.6N 122.0E ML=4.0 EMSC MINAHASA, SULAWESI, INDONESIA

O: 8MAY2021 03:34:31 0.2N 122.4E ML=4.2 EMSC MINAHASA, SULAWESI, INDONESIA

P: 9MAY2021 133398 1.0N 122.0E 4.0-5.5 AAAAA Celebes Sea

O: 7MAY2021 15:30:59 4.1N 125.9E ML=4.0 EMSC KEPULAUAN SANGIHE, INDONESIA

O: 7MAY2021 07:43:50 4.4N 127.4E mb=4.8 EMSC KEPULAUAN TALAUD, INDONESIA

P: 6MAY2021 133410 4.0N 126.0E 4.0-5.4 AAAAA Mindanao, Philippines

O: 7MAY2021 07:10:43 6.1N 126.0E mb=4.6 EMSC MINDANAO, PHILIPPINES

P: 9MAY2021 133410 6.0N 125.0E 4.0-5.5 AAAAA Mindanao, Philippines

P: 10MAY2021 133401 7.0N 126.0E 4.0-5.7 BAAAA Central Philippines

O: 7MAY2021 19:07:05 8.3S 106.8E ML=4.2 EMSC SOUTH OF JAVA, INDONESIA

P: 7MAY2021 133645 10.0S 107.0E 4.0-5.6 ABAAA So. of Java

O: 7MAY2021 09:25:23 8.4S 120.7E mb=4.3 EMSC FLORES REGION, INDONESIA

P: 9MAY2021 133419 8.0S 121.0E 4.0-5.5 AAAAA Flores Island area

O: 7MAY2021 13:17:11 10.8S 122.0E mb=4.4 EMSC SAVU SEA

P: 9MAY2021 133644 11.0S 119.0E 4.0-5.4 AACAA So. of Indonesia

CENTRAL AND SOUTH AMERICA

O: 8MAY2021 02:31:26 12.1N 60.0W mb=4.4 EMSC TOBAGO REGION, TRINIDAD-TOBAGO

P: 4MAY2021 133467 11.0N 62.0W 3.4-5.2 BBBAA Windward Islands

O: 7MAY2021 21:46:30 4.9S 80.7W mb=4.2 EMSC PERU-ECUADOR BORDER REGION

P: 6MAY2021 133418 4.0S 80.0W 4.0-5.8 AAAAA Ecuador

O: 7MAY2021 07:26:30 8.8N 84.3W ML=4.3 EMSC OFF COAST OF COSTA RICA

P: 7MAY2021 133404 9.0N 85.0W 3.5-5.2 AAAAA Costa Rica

O: 8MAY2021 06:38:25 16.8N 94.6W mb=4.1 EMSC OAXACA, MEXICO

P: 5MAY2021 133444 16.0N 95.0W 3.5-5.1 BAAAA Chiapas, Mexico

O: 7MAY2021 08:44:55 18.0N 103.3W ML=3.4 EMSC OFFSHORE MICHOACAN, MEXICO

P: 5MAY2021 133454 18.0N 104.0W 3.5-5.6 AAAAA Michoacan, Mexico

O: 7MAY2021 13:47:20 18.6N 101.6W ML=4.1 EMSC MICHOACAN, MEXICO

P: 7MAY2021 133454 19.0N 101.0W 3.5-5.8 AAAAA Michoacan, Mexico

O: 7MAY2021 07:44:44 19.4N 67.1W Md=3.5 EMSC PUERTO RICO REGION

P: 5MAY2021 133463 18.0N 67.0W 3.4-5.0 ABAAA Puerto Rico

P: 5MAY2021 133469 20.0N 68.0W 3.0-4.7 AAAAA Bahamas/No. Caribbean

O: 8MAY2021 02:29:21 21.9S 67.4W mb=4.6 EMSC POTOSI, BOLIVIA

P: 7MAY2021 133652 23.0S 67.0W 4.0-5.6 ABAAA Argentina

O: 7MAY2021 15:01:39 21.9S 68.7W mb=4.7 EMSC ANTOFAGASTA, CHILE

P: 10MAY2021 133670 20.0S 69.0W 4.0-5.4 BBAAA So. Peru/Bolivia

NEIC reported this earthquake of M 4.6 in Antofagasta, Chile was felt with intensity II-III in the area(s) of Iquique, Tarapaca, Chile.

O: 7MAY2021 16:19:49 24.2S 67.2W ML=4.1 EMSC SALTA, ARGENTINA

P: 7MAY2021 133652 23.0S 67.0W 4.0-5.6 ABAAA Argentina

O: 8MAY2021 02:23:21 27.7N 111.7W ML=4.2 EMSC GULF OF CALIFORNIA

P: 10MAY2021 133472 28.0N 112.0W 3.5-5.1 AAAAA Gulf of California

AFRICA AND EUROPE

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

SOUTHWEST PACIFIC

O: 7MAY2021 10:29:38 12.0S 166.7E mb=4.4 EMSC SANTA CRUZ ISLANDS

P: 5MAY2021 133649 12.0S 167.0E 4.0-5.8 AAAAA Vanuatu Islands

O: 7MAY2021 23:35:15 18.9S 177.6W Mw=6.1 EMSC FIJI REGION

P: 8MAY2021 133647 18.0S 178.0W 4.0-5.7 AAAAA Tonga Islands

OCEAN RIDGES

O: 7MAY2021 11:45:25 14.1N 48.3W Mw=5.5 EMSC NORTH ATLANTIC OCEAN

P: 8MAY2021 133455 15.0N 46.0W 4.0-5.5 AABAA Mid-Atlantic Ridge

O: 8MAY2021 04:13:57 4.5S 105.4W Mw=4.9 EMSC CENTRAL EAST PACIFIC RISE

P: 10MAY2021 133425 5.0S 105.0W 4.0-5.6 AAAAA No. East Pacific Rise

O: 7MAY2021 15:21:14 54.5S 144.1E Mw=6.0 EMSC WEST OF MACQUARIE ISLAND

O: 7MAY2021 10:48:37 56.5S 26.7W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION

P: 9MAY2021 133712 57.0S 27.0W 4.0-6.0 AAAAA So. Sandwich Islands

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

ZEALANDIA AND AUSTRALIA REGION

O: 7MAY2021 15:21:14 54.5S 144.1E Mw=6.0 EMSC WEST OF MACQUARIE ISLAND

O: 7MAY2021 11:13:13 42.5S 173.0E ML=3.8 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 7MAY2021 17:14:51 43.5S 172.8E ML=3.7 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 07MAY2021 11:13:13 42.5S 173.0E ML=4.0 GEONET Felt with moderate intensity

P: 8MAY2021 133707 42.0S 172.0E 3.0-4.9 AAAAA So. Island, N.Z.

GEONET reported this earthquake was felt with moderate intensity in northern South Island. 50 people reported feeling this event; 24 with weak intensity; 17 with light shaking; 8 moderate; 0 strong; 0 with severe and 1 with extreme shaking.

JAPAN AND KURIL ISLANDS

O: 8MAY2021 04:19:08 32.0N 140.5E Mw=5.2 EMSC IZU ISLANDS, JAPAN REGION

P: 7MAY2021 133524 32.0N 142.0E 4.0-5.6 AAAAA Off East Coast Honshu

O: 8MAY2021 05:38:28 39.9N 143.9E mb=4.2 EMSC OFF EAST COAST OF HONSHU, JAPA

P: 9MAY2021 133525 39.0N 141.0E 4.0-5.4 AABAA Off East Coast Honshu

O: 8MAY2021 03:20:06 47.0N 152.8E mb=4.2 EMSC KURIL ISLANDS

P: 4MAY2021 133585 48.0N 154.0E 3.5-5.8 BAAAA So. Kurils

O: 08MAY2021 00:38:16 50.7N 154.6E mb=4.5 EMSC KURIL ISLANDS

O: 7MAY2021 08:08:19 49.6N 155.7E mb=4.9 EMSC KURIL ISLANDS

P: 7MAY2021 133570 49.0N 155.0E 3.5-5.8 AAAAA NE Pacific

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 07MAY2021 08:53:20 30.1N 113.9W ML=4.0 EMSC GULF OF CALIFORNIA

O: 07MAY2021 08:58:35 30.1N 113.8W ML=3.8 EMSC GULF OF CALIFORNIA

O: 07MAY2021 09:00:14 30.1N 113.7W ML=3.9 EMSC GULF OF CALIFORNIA

O: 07MAY2021 09:27:03 30.1N 113.9W ML=3.8 EMSC GULF OF CALIFORNIA

O: 7MAY2021 08:49:02 30.0N 114.0W ML=4.1 EMSC GULF OF CALIFORNIA

P: 1MAY2021 133527 30.2N 114.1W 2.0-4.1 BAAAA SW U.S.A

O: 7MAY2021 22:40:19 33.7N 116.8W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 3MAY2021 133533 33.9N 116.9W 2.5-4.8 BAAAA So. California

O: 8MAY2021 03:27:51 36.0N 116.1W ml=2.3 EMSC CENTRAL CALIFORNIA

P: 9MAY2021 133516 37.3N 114.9W 2.5-4.4 ABAAA Nevada area

O: 7MAY2021 07:27:01 36.1N 120.7W Md=2.6 EMSC CENTRAL CALIFORNIA

P: 3MAY2021 133498 36.2N 120.8W 2.5-4.4 BAAAA 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 at Cambria.

O: 7MAY2021 18:13:51 36.5N 117.5W ML=2.1 EMSC CENTRAL CALIFORNIA

P: 9MAY2021 133491 36.2N 117.9W 2.5-5.1 AAAAA California/Nevada area

O: 7MAY2021 23:59:43 39.1N 120.0W ml=2.2 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

NEIC reported this earthquake of M 2.6 in Tahoe City, California was felt with intensity II-III in the area(s) of Tahoe City, California at Rahoe City, Pollock Pines, Camino, Yuba City, Sacramento and in Nevada at Glenbrook and Gardnerville.

O: 7MAY2021 16:31:59 40.3N 124.0W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 8MAY2021 133576 40.6N 124.9W 2.5-4.6 AAAAA Off Coast of No. Calif

ALASKA

O: 7MAY2021 15:58:13 56.5N 148.5W ML=3.4 EMSC GULF OF ALASKA

P: 5MAY2021 133626 54.9N 149.8W 3.0-4.6 ABAAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 7MAY2021 14:20:49 42.0N 125.9W ML=2.8 EMSC OFF COAST OF OREGON

P: 9MAY2021 133577 40.9N 126.3W 2.5-4.8 ABAAA Off Coast of No. Calif

ROCKY MOUNTAINS REGION

O: 7MAY2021 12:04:09 40.2N 111.2W Ml=2.0 EMSC UTAH

P: 6MAY2021 133550 39.7N 110.8W 2.0-4.1 AAAAA Utah area

O: 7MAY2021 14:13:56 28.4N 100.1W mb=2.6 EMSC SOUTHERN TEXAS

P: 30APR2021 133183 29.0N 98.0W 3.0-4.6 CABAA Northern Mexico

NEIC reported this earthquake of M 2.8 in Southern Texas was felt with intensity II-III in the area(s) of Southern Texas at Round Rock.

O: 07MAY2021 07:18:21 44.3N 115.2W Ml=2.0 EMSC SOUTHERN IDAHO

O: 08MAY2021 00:39:14 44.3N 115.2W Ml=2.2 EMSC SOUTHERN IDAHO

O: 08MAY2021 00:43:36 44.3N 115.1W Ml=2.0 EMSC SOUTHERN IDAHO

O: 7MAY2021 06:52:25 44.3N 115.2W Ml=2.0 EMSC SOUTHERN IDAHO

P: 9MAY2021 133566 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho

O: 7MAY2021 12:54:27 45.4N 112.1W Ml=2.1 EMSC WESTERN MONTANA

P: 3MAY2021 133567 45.7N 112.1W 2.0-4.4 BAAAA Montana/Idaho

P: 7MAY2021 133592 45.6N 111.9W 2.0-4.4 AAAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 8MAY2021 02:45:59 39.7N 98.4W mb=2.7 EMSC KANSAS

P: 4MAY2021 133547 39.0N 99.0W 2.0-4.3 BAAAA Southern Plains

HAWAII

O: 07MAY2021 14:22:14 19.3N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

O: 8MAY2021 06:33:14 19.2N 155.5W ML=3.5 EMSC ISLAND OF HAWAII, HAWAII

P: 7MAY2021 133448 19.9N 156.1W 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 at Naalehu, Captain Cook, Volcanom, Kailua Kona, Honomu and Kamuela.

MODERATE QUAKE SHAKES TAHOE, CALIFORNIA AREA

EARTHQUAKE SUMMARY FOR MAY 6, 2021

A moderate earthquake of M 4.7 was widely felt in the area of Tahoe on the northern border of California and Nevada today. This was the strongest earthquake in the U.S. or Canada today. It was accompanied by several felt foreshocks and aftershocks. NEIC reported it was felt with maximum intensity IV in California at Sierraville, Truckee, Soda Springs, Norden, Loyalton, Kings Beach and with lesser intensity in Tahoe National Park, Calpine, and Carnelian Bay among other localities. An M 2.5 regional foreshock occurred and was felt with intensity II in Incline Village, Nevada. This is the strongest earthquake in the Tahoe region within about 150 km of this epicenter since an M 4.8 on August 4, 2016 about 75 km northeast of today's epicenter. An M 5.0 hit about 150 km west of this on January 30, 2016. A moderately larger M 5.7 occurred about 100 km northwest of today's epicenter on May 24, 2013 - that was the strongest in the area in the past 30 years at least.

When an M 3.7 hit the area about 50 km south of this epicenter near Reno, Nevada and Tahoe, California on April 25, 2021 this summary noted:

"A moderate earthquake of M 3.7 was widely felt in the area of Reno, Nevada near the California-Nevada border. NEIC reported it was felt with intensity IV in Tahoe City, Olympic Valley, Homewood, Kings Beach and III in Tahoe Vista, Tahoma, Carnelian Bay and in Nevada with II-III in Carson City, Glenbrook.

This is the strongest earthquake in this region within about 100 km since an M 4.5 in Nevada about 50 km to the east of today's epicenter. An M 3.7-3.8 also occurred about 100 km east of this on December 12, 2020. Forecast 133197 had expected today's quake within about 25 km was likely around April 24. This epicenter is at the fourth node (90 degrees) from the M 7.7 in the Loyalty Islands of February 10 and at the fifth node (72 degrees) from the recent major earthquakes off eastern Honshu, Japan of March 20 and may have been promoted by energy from those sources." (April 25-26, 2021)

Forecasts 133496 and 133503 had expected today's activity was likely within about 25 km of these epicenters to occur around May 6-9 with magnitude up to M 4.6.

O: 07MAY2021 04:35:13 39.5N 120.3W Mw=4.7 EMSC NORTHERN CALIFORNIA

O: 07MAY2021 04:37:37 39.5N 120.3W ML=3.1 EMSC NORTHERN CALIFORNIA

O: 07MAY2021 05:03:57 39.5N 120.3W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 7MAY2021 04:26:30 39.5N 120.3W ML=3.3 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

P: 9MAY2021 133503 39.8N 120.6W 2.5-4.6 AAAAA Central California

O: 6MAY2021 13:18:34 39.1N 120.0W MD=2.5 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

A pair of moderate earthquakes of M 4.1 and 4.2 also occurred in the Gulf of California today. Earthquakes of M>=4.2 have most recently occurred within about 100 km of these epicenters on April 1, 2021 (M 4.7) and February 13, 2020 (M 4.3). Forecast 133527 had expected this activity within about 25 km was likely to occur in early May.

O: 07MAY2021 02:03:48 30.1N 113.8W ML=4.1 EMSC GULF OF CALIFORNIA

O: 6MAY2021 17:05:52 30.1N 113.9W ML=4.2 EMSC GULF OF CALIFORNIA

P: 1MAY2021 133527 30.2N 114.1W 2.0-4.1 BAAAA SW U.S.A

A series of light earthquakes also occurred today in the region of northern

Kansas. This included an M 3.8 and afterhocks of M 3.0, 3.1 and 3.1. An M 3.8 in northern Kansas today was widely felt. NEIC reported this earthquake and aftershocks of M 3.1 in Kansas was felt with intensity IV in the area(s) of Kansas at Formoso, Courtland, Burr Oak, Hope and II-III in Jewel, Randall, Webber, Mankato, Belleville, Concordia, and Bend, Herington and Ramona. Other aftershocks of M 3.1 and 3.0 in Kansas were felt with intensity IV in Formoso and possibly in Sylvan Grove and in Peru, Nebraska. This is the strongest earthquake within about 100 km of this epicenter in the past year. An M 4.5 occurred about 150 km southeast of this in Kansas on January 19, 2020. Forecast 133547 had expected today's activity in northern Kansas was likely around May 4. This activity is at 101-103 degrees from the major quakes in February and March, 2020 in the Kermadec and Loyalty Islands and was probably promoted by energy from those sources. Other events at this distance from these quakes occurred as an M 4.7 in Siberia, southern Alaska and Panama.

O: 06MAY2021 13:04:24 39.7N 98.0W mb=3.0 EMSC KANSAS

O: 06MAY2021 11:35:32 39.8N 98.0W mb=3.8 EMSC KANSAS

O: 7MAY2021 06:30:18 38.7N 97.0W mb=3.1 EMSC KANSAS

O: 6MAY2021 18:20:33 39.8N 98.0W mb=3.1 EMSC KANSAS

P: 4MAY2021 133547 39.0N 99.0W 2.0-4.3 AAAAA Southern Plains

An M 3.8 occurred in the region of southwestern Puerto Rico near Ponce today. NEIC reported this earthquake of M 3.8 in Southwest Puerto Rico was felt with intensity II-III in the area(s) of Southwest Puerto Rico with IV in Lajas, Sabana Grande and lesser shaking at Guanica, San German, Cabo Rojo, Yauco, Ponce and Guaynaco. The last earthquake in this aftershock zone of larger magnitude occurred on December 24, 2020 with a series including an M 4.7 and M 4.8. Forecast 133463 had expected today's event was likely within about 10 km of the M 3.8 to occur around May 5.

O: 06MAY2021 13:02:30 17.9N 67.0W ML=3.4 EMSC PUERTO RICO REGION

O: 06MAY2021 13:06:07 18.0N 67.0W Md=3.2 EMSC PUERTO RICO REGION

O: 06MAY2021 13:08:56 18.0N 67.0W ML=3.8 EMSC PUERTO RICO REGION

O: 06MAY2021 13:13:31 18.0N 67.0W Md=3.2 EMSC PUERTO RICO REGION

O: 06MAY2021 13:25:34 18.0N 67.0W Md=3.1 EMSC PUERTO RICO REGION

O: 6MAY2021 21:43:10 18.0N 67.0W Md=3.1 EMSC PUERTO RICO REGION

P: 5MAY2021 133463 18.0N 67.0W 3.4-5.0 AAAAA Puerto Rico

The strongest earthquake in the world today was an M 5.3 in Central Vanuatu.

It was not reported felt in this area. A similar M 5.3-5.4 quake hit about 100 km northeast of this on May 1, 2021 but the last of larger magnitude in the region was an M 5.8 about 150 km south of this on February 28, 2020. Forecast 133649 had expected today's event was likely within about 75 km around May 3.

O: 6MAY2021 12:20:37 16.6S 167.5E mb=5.3 EMSC VANUATU

P: 3MAY2021 133649 17.0S 167.0E 4.0-5.6 BAAAA Vanuatu Islands

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 6MAY2021 07:07:18 42.6N 79.5E mb=4.5 EMSC EASTERN KAZAKHSTAN

P: 1MAY2021 133563 41.0N 77.0E 4.0-5.5 BBBAA Kirgizstan/Xinjiang

O: 6MAY2021 19:53:15 53.7N 161.4E mb=4.5 EMSC OFF EAST COAST OF KAMCHATKA

P: 4MAY2021 133599 54.0N 161.0E 4.0-5.5 AAAAA E. of Kamchatka

O: 6MAY2021 20:08:55 56.1N 113.7E mb=4.1 EMSC BURYATIYA, RUSSIA

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

INDONESIA AND PHILIPPINES

O: 6MAY2021 17:42:37 1.5S 134.4E ML=4.7 EMSC NEAR N COAST OF PAPUA, INDONES

P: 6MAY2021 133435 1.0S 133.0E 4.0-5.5 AABAA West Irian, PNG

P: 6MAY2021 133435 3.0S 134.0E 4.0-5.6 ABAAA West Irian, PNG

O: 6MAY2021 11:26:10 1.6N 128.5E ML=4.4 EMSC HALMAHERA, INDONESIA

P: 3MAY2021 133406 1.0N 128.0E 4.0-5.5 BAAAA Halmahera

O: 6MAY2021 17:06:25 2.2S 139.5E ML=4.4 EMSC NEAR N COAST OF PAPUA, INDONES

P: 4MAY2021 133436 2.0S 139.0E 4.0-5.5 AAAAA West Irian, PNG

O: 7MAY2021 02:16:54 2.9S 129.7E mb=4.4 EMSC SERAM, INDONESIA

O: 7MAY2021 02:00:11 4.2S 128.9E ML=4.4 EMSC BANDA SEA

P: 1MAY2021 133417 4.0S 128.0E 4.0-5.4 CAAAA Ceram area

O: 6MAY2021 13:17:09 5.3N 126.3E mb=4.5 EMSC MINDANAO, PHILIPPINES

P: 2MAY2021 133410 5.0N 126.0E 4.0-5.6 BAAAA Mindanao, Philippines

O: 6MAY2021 22:21:26 5.5S 151.8E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.

P: 4MAY2021 133422 5.0S 152.0E 4.0-5.4 AAAAA New Britain

O: 6MAY2021 20:07:36 6.2N 124.1E ML=4.4 EMSC MINDANAO, PHILIPPINES

P: 9MAY2021 133410 6.0N 125.0E 4.0-5.5 BAAAA Mindanao, Philippines

O: 6MAY2021 12:11:07 7.5S 127.9E mb=4.9 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 5MAY2021 133438 7.0S 130.0E 4.0-5.4 AABAA West Irian, PNG

CENTRAL AND SOUTH AMERICA

O: 06MAY2021 13:02:30 17.9N 67.0W ML=3.4 EMSC PUERTO RICO REGION

O: 06MAY2021 13:06:07 18.0N 67.0W Md=3.2 EMSC PUERTO RICO REGION

O: 06MAY2021 13:08:56 18.0N 67.0W ML=3.8 EMSC PUERTO RICO REGION

O: 06MAY2021 13:13:31 18.0N 67.0W Md=3.2 EMSC PUERTO RICO REGION

O: 06MAY2021 13:25:34 18.0N 67.0W Md=3.1 EMSC PUERTO RICO REGION

O: 6MAY2021 21:43:10 18.0N 67.0W Md=3.1 EMSC PUERTO RICO REGION

P: 5MAY2021 133463 18.0N 67.0W 3.4-5.0 AAAAA Puerto Rico

O: 6MAY2021 23:44:23 3.0N 84.3W mb=4.3 EMSC OFF COAST OF CENTRAL AMERICA

P: 9MAY2021 133403 4.0N 83.0W 4.0-5.6 BABAA Ecuador

O: 6MAY2021 13:38:30 10.0N 84.1W ML=3.1 EMSC COSTA RICA

P: 7MAY2021 133404 9.0N 85.0W 3.5-5.2 AAAAA Costa Rica

O: 6MAY2021 18:32:33 15.8N 96.1W ML=4.1 EMSC OAXACA, MEXICO

P: 6MAY2021 133460 15.0N 97.0W 3.5-5.1 AAAAA Oaxaca, Mexico

O: 06MAY2021 13:31:26 17.4N 100.0W mb=4.6 EMSC GUERRERO, MEXICO

O: 6MAY2021 14:05:30 16.9N 100.2W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO

P: 8MAY2021 133462 17.0N 100.0W 3.5-5.3 AAAAA Oaxaca, Mexico

NEIC reported this earthquake of M 4.6 in Guerrero, Mexico was felt with intensity II-III in the area(s) of Guerrero, Mexico in Acapulco and Tierra Colorado (IV) and in Chipancingo, and in Mexico City and Tlalnepantla.

O: 6MAY2021 21:43:10 18.0N 67.0W Md=3.1 EMSC PUERTO RICO REGION

P: 5MAY2021 133463 18.0N 67.0W 3.4-5.0 AAAAA Puerto Rico

O: 6MAY2021 21:28:53 19.7N 71.0W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 7MAY2021 133469 20.0N 71.0W 3.0-4.9 AAAAA Bahamas/No. Caribbean

O: 6MAY2021 08:57:01 19.7N 108.5W ML=4.0 EMSC REVILLA GIGEDO ISLANDS REGION

P: 10MAY2021 133446 19.0N 109.0W 3.5-5.1 BAAAA Coast of Jalisco, Mexico

O: 6MAY2021 09:35:28 20.2N 70.8W ML=3.1 EMSC DOMINICAN REPUBLIC REGION

P: 7MAY2021 133469 20.0N 71.0W 3.0-4.9 AAAAA Bahamas/No. Caribbean

O: 6MAY2021 12:18:02 21.3S 68.5W mb=4.6 EMSC ANTOFAGASTA, CHILE

P: 4MAY2021 133651 21.0S 67.0W 4.0-5.8 AABAA Argentina

O: 6MAY2021 23:50:28 24.0S 67.1W mb=4.2 EMSC SALTA, ARGENTINA

P: 7MAY2021 133652 23.0S 67.0W 4.0-5.6 AAAAA Argentina

AFRICA AND EUROPE

O: 7MAY2021 03:08:07 37.6N 19.7E mb=4.4 EMSC IONIAN SEA

P: 3MAY2021 133519 37.0N 21.0E 3.0-4.8 BAAAA No. Greece

P: 8MAY2021 133519 38.0N 22.0E 3.0-4.4 AABAA No. Greece

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

SOUTHWEST PACIFIC

O: 6MAY2021 18:01:33 11.5S 113.4E ML=4.1 EMSC SOUTH OF JAVA, INDONESIA

P: 6MAY2021 133644 11.0S 115.0E 4.0-5.4 AABAA So. of Indonesia

O: 7MAY2021 02:40:46 15.7S 167.4E mb=4.9 EMSC VANUATU

P: 6MAY2021 133649 15.0S 167.0E 4.0-5.4 AAAAA Vanuatu Islands

O: 6MAY2021 12:20:37 16.6S 167.5E mb=5.3 EMSC VANUATU

P: 3MAY2021 133649 17.0S 167.0E 4.0-5.6 BAAAA Vanuatu Islands

O: 6MAY2021 23:26:59 18.8S 177.3W mb=4.5 EMSC FIJI REGION

P: 5MAY2021 133647 19.0S 177.0W 4.0-5.6 AAAAA Tonga Islands

O: 7MAY2021 06:46:26 21.0S 173.9W mb=5.0 EMSC TONGA

P: 4MAY2021 133672 20.0S 174.0W 4.0-5.5 BAAAA Tonga Islands

O: 7MAY2021 04:25:30 25.7S 176.1W mb=5.2 EMSC SOUTH OF FIJI ISLANDS

P: 7MAY2021 133675 25.0S 177.0W 4.0-5.6 AAAAA Tonga Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 6MAY2021 12:40:00 29.6S 176.1W mb=5.0 EMSC KERMADEC ISLANDS REGION

P: 7MAY2021 133663 29.0S 178.0W 4.0-5.4 AABAA No. Kermadec Islands

O: 6MAY2021 10:33:29 31.0S 180.0E ML=4.3 EMSC KERMADEC ISLANDS REGION

O: 06MAY2021 21:46:40 31.5S 179.2E ML=4.3 EMSC KERMADEC ISLANDS REGION

P: 5MAY2021 133700 32.0S 178.0W 4.0-5.5 AABAA So. Kermadec Islands

O: 7MAY2021 04:11:35 34.6S 179.1E ML=3.6 EMSC SOUTH OF KERMADEC ISLANDS

P: 8MAY2021 133694 37.0S 178.0E 3.0-4.4 ACAAA North Island, N.Z.

JAPAN AND KURIL ISLANDS

O: 6MAY2021 15:15:14 42.3N 142.4E mb=4.3 EMSC HOKKAIDO, JAPAN REGION

P: 2MAY2021 133559 41.0N 141.0E 3.5-5.4 BBAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 6MAY2021 13:18:34 39.1N 120.0W MD=2.5 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

O: 07MAY2021 02:03:48 30.1N 113.8W ML=4.1 EMSC GULF OF CALIFORNIA

O: 6MAY2021 17:05:52 30.1N 113.9W ML=4.2 EMSC GULF OF CALIFORNIA

P: 1MAY2021 133527 30.2N 114.1W 2.0-4.1 BAAAA SW U.S.A

O: 6MAY2021 21:39:05 33.0N 118.6W ML=2.7 EMSC CHANNEL ISLANDS REG., CALIFORN

P: 4MAY2021 133534 34.3N 118.5W 2.5-5.2 ABAAA So. California

NEIC reported this earthquake of M 2.7 in the Channel Islands, California was felt with intensity II-III in the area(s) of the Channel Islands, California at Torrance.

O: 7MAY2021 05:59:06 33.7N 116.8W Ml=2.8 EMSC SOUTHERN CALIFORNIA

P: 3MAY2021 133533 33.9N 116.9W 2.5-4.8 BAAAA So. California

NEIC reported this earthquake of M 2.8 in Southern California was felt with intensity II-III in the area(s) of Southern California at Idyllwild, Banning and Cathedral City.

O: 6MAY2021 17:32:59 35.6N 117.5W Ml=2.7 EMSC SOUTHERN CALIFORNIA

P: 6MAY2021 133540 35.8N 117.6W 2.5-5.0 AAAAA So. California

O: 6MAY2021 14:20:17 36.1N 120.7W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 3MAY2021 133498 36.2N 120.8W 2.5-4.4 BAAAA Central California

O: 7MAY2021 02:35:35 36.4N 121.0W Md=2.1 EMSC CENTRAL CALIFORNIA

P: 3MAY2021 133498 36.2N 120.8W 2.5-4.4 BAAAA Central California

O: 6MAY2021 20:13:37 36.7N 121.3W Md=2.4 EMSC CENTRAL CALIFORNIA

P: 2MAY2021 133499 36.7N 121.4W 2.5-4.5 BAAAA Central California

O: 6MAY2021 13:42:21 37.4N 121.7W Md=2.4 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 7MAY2021 133500 37.4N 121.8W 2.5-4.6 AAAAA Central California

O: 06MAY2021 20:04:47 35.9N 117.7W Ml=2.5 EMSC CENTRAL CALIFORNIA

O: 6MAY2021 20:55:50 37.7N 118.0W ml=2.4 EMSC NEVADA

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 AAAAA California/Nevada area

O: 6MAY2021 13:21:14 38.8N 122.8W Md=2.4 EMSC NORTHERN CALIFORNIA

O: 06MAY2021 21:52:24 38.8N 122.8W Md=2.5 EMSC NORTHERN CALIFORNIA

P: 4MAY2021 133501 38.9N 122.8W 2.5-4.6 AAAAA Central California

NEIC reported this earthquake of M 2.5 in the Geysers, California was felt with intensity II-III in the area(s) of the Geysers, California at Kelseyville.

O: 6MAY2021 13:18:34 39.1N 120.0W MD=2.5 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

O: 7MAY2021 00:51:48 39.5N 122.3W Md=2.6 EMSC NORTHERN CALIFORNIA

P: 7MAY2021 133502 39.3N 123.2W 2.5-4.6 AAAAA Central 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 at Live Oak.

O: 07MAY2021 04:35:13 39.5N 120.3W Mw=4.7 EMSC NORTHERN CALIFORNIA

O: 07MAY2021 04:37:37 39.5N 120.3W ML=3.1 EMSC NORTHERN CALIFORNIA

O: 07MAY2021 05:03:57 39.5N 120.3W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 7MAY2021 04:26:30 39.5N 120.3W ML=3.3 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

P: 9MAY2021 133503 39.8N 120.6W 2.5-4.6 AAAAA Central California

ALASKA

O: 7MAY2021 03:49:57 54.7N 160.6W ML=3.1 EMSC ALASKA PENINSULA

P: 5MAY2021 133614 54.5N 161.8W 3.5-5.3 AAAAA Unimak Islands, Aleutians

O: 6MAY2021 21:35:13 58.4N 151.1W ML=3.0 EMSC KODIAK ISLAND REGION, ALASKA

P: 2MAY2021 133620 60.5N 151.5W 3.2-4.9 BBAAA Central Alaska

NEIC reported this earthquake of M 3.0 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Talkeetna and Wasilla.

O: 06MAY2021 09:31:13 62.1N 148.5W ML=3.0 EMSC CENTRAL ALASKA

O: 7MAY2021 01:00:06 62.0N 149.8W ML=3.0 EMSC CENTRAL ALASKA

P: 6MAY2021 133622 62.8N 149.1W 3.2-4.9 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

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

EASTERN U.S./CANADA

O: 5MAY2021 07:47:25 47.8N 70.0W MB=1.5 ECAN Charlevoix Seismic Zone

P: 4MAY2021 133564 47.0N 69.0W 2.0-3.9 AAAAA Maine

O: 06MAY2021 13:04:24 39.7N 98.0W mb=3.0 EMSC KANSAS

O: 06MAY2021 11:35:32 39.8N 98.0W mb=3.8 EMSC KANSAS

O: 7MAY2021 06:30:18 38.7N 97.0W mb=3.1 EMSC KANSAS

O: 6MAY2021 18:20:33 39.8N 98.0W mb=3.1 EMSC KANSAS

P: 4MAY2021 133547 39.0N 99.0W 2.0-4.3 AAAAA Southern Plains

O: 06MAY2021 13:54:32 36.0N 98.0W ML=2.1 EMSC OKLAHOMA

O: 7MAY2021 04:23:55 36.0N 98.0W ML=2.2 EMSC OKLAHOMA

O: 6MAY2021 13:30:05 36.4N 98.2W ML=2.2 EMSC OKLAHOMA

P: 9MAY2021 133546 36.0N 97.0W 2.0-4.5 BAAAA Southern Plains

HAWAII

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

MODERATE SEISMICITY IN OCEAN RIDGES

EARTHQUAKE SUMMARY FOR MAY 5, 2021

Moderate activity occurred today in the ocean ridges. This included an M 5.4 in the area west of the Macquarie Island area and an M 5.1 in the Southwest Indian Ridge. An M 6.1 hit the area west of Macquarie Island on March 20, 2021 about 400 km southeast of today's epicenter but the last of similar or larger magnitude within about 200 km of today's epicenter occurred as an M 5.7 on November 8, 2016 and prior to that as an M 5.5 on December 24, 2014. The antipode of this event is at 57N 33W in the Reykjanes Ridge in the north Atlantic Ridge south of Iceland. Some seismic enhancement in this region is possible following today's event in the Macquarie Island area.

O: 5MAY2021 19:20:09 57.0S 147.5E Mw=5.4 EMSC WEST OF MACQUARIE ISLAND

The last event of M>=5.1 within about 200 km of today's epicenter in the Southwest Indian Ridge occurred on March 6, 2020. Forecast 133697 expected this event within this area was likely around May 3. The antipode of this epicenter is located at 31N 121W off the coast of southern California, an area which may see increased seismicity in coming days. This event occurred at 103 degrees from the M 6.8 in Honshu, Japan of May 2 and was probably promoted by energy from that source. Other events at this distance from Honshu, Japan today occurred in Chiapas, Mexico, the Macquarie Island area and in the Azores.

O: 5MAY2021 21:22:59 30.9S 59.3E mb=5.1 EMSC SOUTHWEST INDIAN RIDGE

P: 3MAY2021 133697 32.0S 59.0E 4.0-5.7 ABAAA So. Indian Ocean

The strongest earthquakes in the U.S. or Canada today occurred in the Aleutians of Alaska. These were and M 4.8 in the Alaska Peninsula near Unimak Island and an M 4.5 in the Near Islands in the western portion of the Aleutians. Neither of these event were reported felt in these areas. The only earthquake of M>=4.5 in this area of the Near Islands in the past year was an M 4.6 on November 30, 2020. Earthquakes about 200 km to the west of today's Near Islands epicenter occurred in the past year with M 5.3 on April 15, 2021 and on December 9, 2020. Forecast 133609 had expected today's event was likely around May 2.

O: 5MAY2021 17:15:49 52.2N 173.6E mb=4.5 EMSC NEAR ISLANDS, ALEUTIAN ISLANDS

P: 2MAY2021 133609 51.0N 176.0E 4.0-5.9 BBBAA Rat Islands

The last earthquake in the Alaska Peninsula within about 200 km of today's epicenter with M>=4.8 occurred as an M 4.9 on February 6, 2021. The last in the Unimak Island area with greater or equal magnitude than M 4.8 occurred as an M 5.1 on January 11, 2021. Other earthquakes in the Unimak Island area of larger magnitude in the past year occurred as an M 5.6 on August 13, 2020 and an M 5.0 on November 4, 2020. Forecast 133614 had expected today's event was likely within about 15 km to occur around May 5.

O: 6MAY2021 00:19:42 54.5N 161.6W mb=4.8 EMSC ALASKA PENINSULA

P: 5MAY2021 133614 54.5N 161.8W 3.5-5.3 AAAAA Unimak Islands, Aleutians

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 5MAY2021 07:19:51 25.1N 94.9E ML=3.9 EMSC MYANMAR-INDIA BORDER REGION

P: 6MAY2021 133477 25.0N 95.0E 4.0-5.4 AAAAA Myanmar

O: 5MAY2021 07:54:18 40.8N 78.3E mb=4.3 EMSC SOUTHERN XINJIANG, CHINA

P: 28APR2021 133266 40.0N 78.0E 4.0-5.4 CAAAA Kirgizstan/Xinjiang

O: 5MAY2021 06:57:55 49.9N 86.7E mb=4.7 EMSC RUSSIA-KAZAKHSTAN BORDER REGIO

P: 1MAY2021 133611 50.0N 88.0E 3.0-4.6 BAAAA So. Siberia

O: 5MAY2021 14:08:43 52.0N 159.3E mb=4.5 EMSC OFF EAST COAST OF KAMCHATKA

P: 5MAY2021 133599 53.0N 160.0E 4.0-5.4 AAAAA E. of Kamchatka

INDONESIA AND PHILIPPINES

O: 5MAY2021 18:13:32 0.1S 123.1E mb=4.9 EMSC SULAWESI, INDONESIA

P: 5MAY2021 133433 1.0S 122.0E 4.0-5.5 AAAAA Sulawesi area

O: 6MAY2021 00:13:49 0.7S 97.6E ML=4.5 EMSC KEPULAUAN BATU, INDONESIA

P: 7MAY2021 133412 0.0N 99.0E 4.0-5.5 AABAA So. Sumatera

O: 05MAY2021 22:27:20 2.2S 140.1E ML=4.3 EMSC NEAR N COAST OF PAPUA, INDONESIA

O: 6MAY2021 02:41:23 1.5S 139.4E ML=4.5 EMSC NEAR N COAST OF PAPUA, INDONES

P: 4MAY2021 133436 2.0S 139.0E 4.0-5.5 AAAAA West Irian, PNG

O: 5MAY2021 20:35:01 3.0S 130.6E ML=4.6 EMSC CERAM SEA, INDONESIA

P: 1MAY2021 133417 4.0S 128.0E 4.0-5.4 BABAA Ceram area

O: 6MAY2021 02:49:03 3.5S 138.5E ML=4.1 EMSC PAPUA, INDONESIA

P: 4MAY2021 133436 2.0S 139.0E 4.0-5.5 ABAAA West Irian, PNG

O: 5MAY2021 11:57:59 4.2S 135.1E ML=4.2 EMSC NEAR S COAST OF PAPUA, INDONES

P: 6MAY2021 133435 3.0S 134.0E 4.0-5.6 ABAAA West Irian, PNG

O: 5MAY2021 16:46:08 5.6S 130.8E ML=4.1 EMSC BANDA SEA

P: 2MAY2021 133438 6.0S 131.0E 4.0-5.5 BAAAA West Irian, PNG

O: 6MAY2021 06:21:24 6.8N 125.2E Mw=5.1 EMSC MINDANAO, PHILIPPINES

P: 9MAY2021 133410 6.0N 125.0E 4.0-5.5 BAAAA Mindanao, Philippines

NEIC reported this earthquake of M 5.1 in Southern Mindanao, Philippines was felt with intensity II-III in the area(s) of Southern Mindanao, Philippines at Davao, Katangawan, Lasang, Buayan Sampao.

O: 5MAY2021 12:40:49 7.8S 106.8E ML=4.0 EMSC JAVA, INDONESIA

P: 6MAY2021 133430 7.0S 105.0E 4.0-5.5 AABAA So. of Java

O: 6MAY2021 04:29:24 13.6N 125.3E ML=4.5 EMSC PHILIPPINE ISLANDS REGION

P: 6MAY2021 133451 14.0N 125.0E 3.5-4.9 AAAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 5MAY2021 07:47:11 8.0S 74.4W mb=4.5 EMSC CENTRAL PERU

P: 1MAY2021 133415 8.0S 74.0W 3.5-5.1 BAAAA Brazil

O: 5MAY2021 07:02:59 2.5S 80.4W ML=4.1 EMSC NEAR COAST OF ECUADOR

P: 5MAY2021 133418 1.0S 81.0W 4.0-5.7 ABAAA Ecuador

O: 6MAY2021 05:22:44 14.5S 75.4W ML=4.0 EMSC NEAR COAST OF CENTRAL PERU

P: 3MAY2021 133637 14.0S 76.0W 4.0-5.4 BAAAA Central Peru

O: 5MAY2021 20:29:26 15.1N 92.9W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 4MAY2021 133444 16.0N 93.0W 3.5-5.5 AAAAA Chiapas, Mexico

O: 6MAY2021 03:47:16 16.9N 93.9W ML=4.2 EMSC CHIAPAS, MEXICO

P: 5MAY2021 133444 16.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 5MAY2021 08:10:43 17.0N 99.1W ML=4.2 EMSC GUERRERO, MEXICO

P: 3MAY2021 133460 16.0N 99.0W 3.5-5.3 AAAAA Oaxaca, Mexico

O: 5MAY2021 15:00:01 18.0N 66.5W Md=3.0 EMSC PUERTO RICO

O: 6MAY2021 05:56:22 18.8N 67.3W Md=3.2 EMSC PUERTO RICO REGION

P: 5MAY2021 133463 18.0N 67.0W 3.4-5.0 AAAAA Puerto Rico

O: 5MAY2021 14:53:28 18.4N 73.0W ML=3.5 EMSC HAITI REGION

P: 4MAY2021 133464 19.0N 71.0W 3.4-5.3 AABAA Puerto Rico

O: 6MAY2021 01:22:51 22.1S 68.6W mb=4.4 EMSC ANTOFAGASTA, CHILE

P: 7MAY2021 133658 23.0S 69.0W 4.0-5.6 AAAAA Coast No. Chile

AFRICA AND EUROPE

O: 5MAY2021 16:24:11 36.4N 20.2W ML=4.1 EMSC AZORES ISLANDS REGION

O: 5MAY2021 06:42:12 40.4N 27.4E ML=4.1 EMSC WESTERN TURKEY

P: 5MAY2021 133548 39.0N 28.0E 3.5-5.0 ABAAA Turkey

EMSC reported an earthquake of M 4.1 in Western Turkey was felt with intensity II-III in the area(s) of Western Turkey at Biga, Marmara, Erkek, Bandirma, and within about 75 km of the epicenter.

O: 5MAY2021 23:40:34 36.4N 27.6E mb=4.4 EMSC DODECANESE IS.-TURKEY BORDER R

P: 6MAY2021 133488 37.0N 27.0E 3.0-4.8 AAAAA Aegean Sea

O: 5MAY2021 17:34:57 51.5N 16.2E ML=3.3 EMSC POLAND

P: 7MAY2021 133607 51.0N 16.0E 3.0-4.4 AAAAA Poland

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

SOUTHWEST PACIFIC

O: 5MAY2021 15:35:45 15.1S 168.2E Mw=5.1 EMSC VANUATU

P: 6MAY2021 133649 15.0S 167.0E 4.0-5.4 AAAAA Vanuatu Islands

O: 6MAY2021 05:27:26 15.8S 177.3W mb=4.6 EMSC FIJI REGION

P: 5MAY2021 133640 15.0S 178.0W 4.0-5.4 AAAAA Samoa Islands

O: 5MAY2021 20:13:42 18.5S 176.0W mb=4.4 EMSC FIJI REGION

P: 5MAY2021 133647 19.0S 177.0W 4.0-5.6 AAAAA Tonga Islands

O: 5MAY2021 08:59:23 22.8S 171.1E mb=4.9 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 4MAY2021 133660 23.0S 171.0E 4.0-5.6 AAAAA Loyalty Islands

OCEAN RIDGES

O: 5MAY2021 19:20:09 57.0S 147.5E Mw=5.4 EMSC WEST OF MACQUARIE ISLAND

O: 5MAY2021 21:22:59 30.9S 59.3E mb=5.1 EMSC SOUTHWEST INDIAN RIDGE

P: 3MAY2021 133697 32.0S 59.0E 4.0-5.7 ABAAA So. Indian Ocean

ZEALANDIA AND AUSTRALIA REGION

O: 6MAY2021 01:02:28 34.7S 179.3E ML=3.6 EMSC SOUTH OF KERMADEC ISLANDS

O: 5MAY2021 12:37:49 37.6S 179.7E ML=3.6 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 4MAY2021 133691 37.0S 180.0E 3.5-5.1 AAAAA E. of North Islands N.Z.

O: 05MAY2021 11:55:38 43.3S 170.8E ML=4.1 EMSC SOUTH ISLAND OF NEW ZEALAND

O: 5MAY2021 09:38:00 43.3S 170.8E ML=3.8 EMSC SOUTH ISLAND OF NEW ZEALAND

P: 8MAY2021 133707 42.0S 172.0E 3.0-4.9 BBAAA So. Island, N.Z.

O: 5MAY2021 19:20:09 57.0S 147.5E Mw=5.4 EMSC WEST OF MACQUARIE ISLAND

JAPAN AND KURIL ISLANDS

O: 6MAY2021 00:16:30 32.7N 130.7E ML=4.0 EMSC KYUSHU, JAPAN

P: 8MAY2021 133513 32.0N 132.0E 3.5-4.9 AAAAA Kyushu, Japan area

O: 5MAY2021 07:42:34 40.3N 143.5E mb=4.6 EMSC OFF EAST COAST OF HONSHU, JAPA

P: 2MAY2021 133559 41.0N 141.0E 3.5-5.4 BABAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 05MAY2021 11:24:38 31.5N 115.7W Ml=3.0 EMSC BAJA CALIFORNIA, MEXICO

O: 5MAY2021 08:58:30 31.5N 115.7W Ml=3.7 EMSC BAJA CALIFORNIA, MEXICO

P: 4MAY2021 133530 32.1N 116.4W 2.5-4.4 AAAAA So. California

O: 5MAY2021 22:14:56 34.0N 116.6W ML=2.7 EMSC SOUTHERN CALIFORNIA

P: 3MAY2021 133533 33.9N 116.9W 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 at Morongo, Desert Hot Springs, Yucca Valley, Banning, Joshua Tree, Palm Desert, Mira Loma, and Corona.

O: 6MAY2021 05:47:16 34.0N 117.6W Ml=2.2 EMSC GREATER LOS ANGELES AREA, CALI

P: 5MAY2021 133535 34.1N 117.4W 2.5-4.8 AAAAA So. California

O: 5MAY2021 14:38:07 35.0N 118.8W Ml=2.3 EMSC CENTRAL CALIFORNIA

P: 3MAY2021 133487 35.3N 118.6W 2.5-2.7 AAAAA So. California

O: 5MAY2021 09:23:51 36.1N 119.2W Ml=2.1 EMSC CENTRAL CALIFORNIA

P: 6MAY2021 133539 35.6N 118.4W 2.5-5.2 AAAAA So. California

O: 5MAY2021 14:58:49 36.2N 120.3W Md=2.6 EMSC CENTRAL CALIFORNIA

P: 2MAY2021 133498 36.1N 120.1W 2.5-4.8 BAAAA Central 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 Los Banos and Gustine.

O: 05MAY2021 11:32:06 36.6N 118.0W Ml=2.1 EMSC CENTRAL CALIFORNIA

O: 05MAY2021 13:58:21 36.6N 118.0W Ml=2.4 EMSC CENTRAL CALIFORNIA

O: 5MAY2021 09:55:21 36.6N 118.0W Ml=2.8 EMSC CENTRAL CALIFORNIA

P: 7MAY2021 133491 36.3N 118.1W 2.5-5.1 AAAAA California/Nevada area

NEIC reported this earthquake of M 2.8 in Central California was felt with intensity II-III in the area(s) of Central California at Lone Pine.

O: 5MAY2021 14:28:10 37.5N 118.8W Md=2.3 EMSC CENTRAL CALIFORNIA

P: 7MAY2021 133495 37.5N 118.6W 2.5-4.6 AAAAA California/Nevada area

O: 05MAY2021 14:17:45 38.2N 117.7W ML=2.5 EMSC NEVADA

O: 06MAY2021 02:34:05 38.2N 117.7W ml=2.0 EMSC NEVADA

O: 5MAY2021 18:33:16 38.1N 118.0W ml=2.7 EMSC NEVADA

P: 4MAY2021 133495 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area

O: 5MAY2021 23:59:39 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 4MAY2021 133501 38.9N 122.8W 2.5-4.6 AAAAA Central California

O: 5MAY2021 13:06:28 39.4N 123.3W Md=2.8 EMSC NORTHERN CALIFORNIA

P: 7MAY2021 133502 39.3N 123.2W 2.5-4.6 AAAAA Central California

NEIC reported this earthquake of M 2.8 in Northern California was felt with intensity II-III in the area(s) of Northern California in Redwood Valley, Willits, Potter Valley, Ukiah, Fort Bragg and Mendocino.

O: 5MAY2021 08:39:09 39.6N 120.4W Md=2.4 EMSC NORTHERN CALIFORNIA

P: 6MAY2021 133496 39.3N 120.0W 2.5-4.5 AAAAA California/Nevada area

O: 5MAY2021 21:30:02 40.4N 124.6W Md=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 4MAY2021 133576 40.2N 124.2W 2.5-4.5 AAAAA Off Coast of No. Calif

ALASKA

O: 5MAY2021 17:15:49 52.2N 173.6E mb=4.5 EMSC NEAR ISLANDS, ALEUTIAN ISLANDS

P: 2MAY2021 133609 51.0N 176.0E 4.0-5.9 BBBAA Rat Islands

O: 6MAY2021 00:19:42 54.5N 161.6W mb=4.8 EMSC ALASKA PENINSULA

P: 5MAY2021 133614 54.5N 161.8W 3.5-5.3 AAAAA Unimak Islands, Aleutians

O: 5MAY2021 18:04:25 67.5N 159.0W ML=3.4 EMSC NORTHERN ALASKA

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 5MAY2021 20:59:12 47.4N 117.9W Ml=2.2 EMSC WASHINGTON

P: 6MAY2021 133568 47.5N 115.8W 2.0-4.1 AABAA Montana/Idaho

O: 4MAY2021 21:41:15 48.8N 129.3W MB=3.3 ECAN Port Alice, BC

P: 4MAY2021 133587 49.3N 129.0W 2.8-5.3 AAAAA Vancouver Island area

ROCKY MOUNTAINS REGION

O: 5MAY2021 17:29:21 44.3N 115.2W Ml=2.3 EMSC SOUTHERN IDAHO

P: 4MAY2021 133566 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho

O: 05MAY2021 10:44:39 32.0N 102.3W mb=2.4 EMSC WESTERN TEXAS

O: 5MAY2021 13:00:11 32.1N 102.2W mb=2.4 EMSC WESTERN TEXAS

P: 8MAY2021 133528 32.5N 103.6W 2.0-3.9 BAAAA SW U.S.A

NEIC reported this earthquake of M 2.5 in Western Texas was felt with intensity II-III in the area(s) of Western Texas at Gardendale and Odessa.

EASTERN U.S./CANADA

O: 05MAY2021 02:57:57 47.7N 69.8W MB=1.4 ECAN Charlevoix Seismic Zone.

O: 05MAY2021 06:53:21 47.5N 70.1W MB=1.4 ECAN Charlevoix Seismic Zone.

O: 5MAY2021 07:47:25 47.8N 70.0W MB=1.5 ECAN Charlevoix Seismic Zone.

P: 4MAY2021 133564 47.0N 69.0W 2.0-3.9 AAAAA Maine

O: 05MAY2021 04:00:29 73.4N 90.3W MB=1.7 ECAN Arctic Bay, NU

O: 4MAY2021 20:38:24 73.0N 89.6W MB=2.0 ECAN Arctic Bay, NU

P: 7MAY2021 133628 64.0N 87.0W 2.5-4.1 BDAAA Nunavit/Hudson Bay, Canada

O: 4MAY2021 22:07:43 72.0N 75.0W MB=2.5 ECAN Pond Inlet, NU

P: 3MAY2021 133633 73.3N 73.5W 2.5-4.2 AAAAA Baffin/Davis Strait Canada

HAWAII

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

MODERATE QUAKES CONTINUE IN SOUTHERN SUMATRA, INDONESIA

EARTHQUAKE SUMMARY FOR MAY 4, 2021

An M 5.7 earthquake in the Mentawai Region off southern Sumatra, Indonesia was the strongest in the world today. BMG reported it was felt with intensity III-IV in the epicentral area of Mentawai. This area has been active since an M 6.3 on November 17, 2020, The last in this area of equal or larger magnitude in the Mentawai area. The last event near this was an M 5.6 on May 2, 2021. At that time this summary noted in this regard:

"An earthquake of M 5.6 (EMSC) -5.7 (BMG) also occurred today in the area of Sumatra near Mentawai. BMG reported it was felt with intensity III-IV in the epicentral area of Mentawai. The last earthquake of M>=5.6 in this area was an M 5.6 north of this of March 5 following the M 8.1 in the Kermadec Islands of March 4, 2021 and prior to that an M 5.9 on November 17, 2020. Forecast 133431 had expected today's event within about 100 km was likely around May 4." (May 3, 2021)

Forecast 133431 had expected today's earthquake was likely within about 100 km around May 4. The antipode of this epicenter is in southern Colombia and Ecuador at 2N 80W - an area which is currently active and could see triggered antipodal seismicity with strong events in this area of Indonesia.

O: 5MAY2021 01:24:35 1.9S 99.8E Mw=5.7 EMSC KEP. MENTAWAI REGION, INDONESI

P: 4MAY2021 133431 2.0S 99.0E 4.0-5.4 AAAAA So. of Sumatera

A series of earthquakes of M 5.0, 5.2 and 5.5 occurred today in central Tonga. These were not reported felt in this remote area. The last earthquake within about 150 km of this epicenter with M>=5.5 occurred as an M 5.5 September 6, 2020 but the last such quake of larger magnitude in ths area was an M 6.1 on June 15, 2019. Forecast 133672 had expected today's event within about 100 km of this epicenter was likely around May 4. This activity is at the fifth node (72 degrees) from the M 6.8 in Japan of May 3 and may have been promoted by energy from that source.

O: 05MAY2021 01:17:28 20.6S 173.8W mb=5.2 EMSC TONGA

O: 05MAY2021 05:16:35 20.7S 173.3W mb=5.0 EMSC TONGA

O: 4MAY2021 19:51:43 20.8S 173.8W Mw=5.5 EMSC TONGA

P: 4MAY2021 133672 20.0S 174.0W 4.0-5.5 AAAAA Tonga Islands

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Fox Islands, Aleutians. It was not reported felt in this remote area. This is the largest earthquake within about 200 km of this epicenter this year and since an M 6.4 about 200 km to the east on December 1, 2020. The last within about 100 km of this epicenter was an M 5.8 on August 15, 2020 and a following event of M 5.6 on September 27, 2020. Forecast 133597 had expected today's event was likely within about 50 km around May 4.

O: 4MAY2021 16:47:43 52.4N 170.6W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 4MAY2021 133597 52.1N 171.3W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians

A regional aftershock occurred in Siberia today about 300 km west of the M 5.7 on the Russia-Mongolia earthquake that occurred yesterday. The last earthquake within about 200 km of today's epicenter with M>=4.7 was an M 4.7 and 5.0 on September 13, 2019. An M 7.3 earthquake hit this area on September 27, 2003. Forecast 133611 had expected today's event within about 100 km was likely around May 1.

O: 5MAY2021 06:57:55 49.9N 86.7E mb=4.7 EMSC RUSSIA-KAZAKHSTAN BORDER REGIO

P: 1MAY2021 133611 50.0N 88.0E 3.0-4.6 BAAAA So. Siberia

Two large asteroids will make a near approach to the earth this week. A meteor shower is also likely to occur. Asteroid 2021 AFB passed nearby at 12:14 UT today (May 4) with magnitude 20.2. The Eta Aquariids Meteor shower is also visible on the morning of May 5-6 especially in the southern Hemisphere. These phenomena are not expected to impact global seismicity.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 4MAY2021 22:42:56 22.9N 121.4E ML=4.4 TAI Hualien, Taiwan

O: 4MAY2021 16:05:23 24.5N 122.9E mb=4.6 EMSC TAIWAN REGION

P: 3MAY2021 133485 24.0N 124.0E 4.0-5.5 AAAAA Taiwan

P: 4MAY2021 133485 22.0N 122.0E 4.0-5.6 AAAAA Taiwan

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

O: 5MAY2021 06:57:55 49.9N 86.7E mb=4.7 EMSC RUSSIA-KAZAKHSTAN BORDER REGIO

P: 1MAY2021 133611 50.0N 88.0E 3.0-4.6 BAAAA So. Siberia

O: 5MAY2021 06:07:55 53.8N 160.1E mb=4.0 EMSC NEAR EAST COAST OF KAMCHATKA

P: 5MAY2021 133599 53.0N 160.0E 4.0-5.4 AAAAA E. of Kamchatka

INDONESIA AND PHILIPPINES

O: 4MAY2021 21:53:38 0.1S 123.7E ML=4.1 EMSC SULAWESI, INDONESIA

P: 5MAY2021 133433 1.0S 122.0E 4.0-5.5 AABAA Sulawesi area

O: 4MAY2021 19:50:22 0.5N 126.2E mb=4.5 EMSC MOLUCCA SEA

P: 1MAY2021 133409 1.0N 126.0E 4.0-5.6 BAAAA Mindanao, Philippines

O: 4MAY2021 22:59:10 1.5N 127.3E Mw=5.0 EMSC HALMAHERA, INDONESIA

P: 3MAY2021 133406 1.0N 128.0E 4.0-5.5 AAAAA Halmahera

O: 5MAY2021 01:24:35 1.9S 99.8E Mw=5.7 EMSC KEP. MENTAWAI REGION, INDONESI

P: 4MAY2021 133431 2.0S 99.0E 4.0-5.4 AAAAA So. of Sumatera

O: 4MAY2021 19:20:46 6.6S 130.3E mb=4.2 EMSC BANDA SEA

O: 05MAY2021 06:07:49 7.0S 131.2E ML=4.0 EMSC KEP. TANIMBAR REGION, INDONESIA

P: 2MAY2021 133438 6.0S 131.0E 4.0-5.5 AAAAA West Irian, PNG

P: 5MAY2021 133438 7.0S 130.0E 4.0-5.4 AAAAA West Irian, PNG

O: 4MAY2021 14:02:56 7.7S 106.1E ML=4.1 EMSC JAVA, INDONESIA

P: 6MAY2021 133430 7.0S 105.0E 4.0-5.5 AAAAA So. of Java

O: 4MAY2021 22:31:15 8.8N 94.2E mb=4.9 EMSC NICOBAR ISLANDS, INDIA REGION

P: 9MAY2021 133439 10.0N 93.0E 4.0-5.6 BBAAA Andaman Islands

CENTRAL AND SOUTH AMERICA

O: 4MAY2021 15:15:35 7.6S 75.0W ML=4.1 EMSC NORTHERN PERU

P: 1MAY2021 133426 6.0S 76.0W 4.0-5.4 BBAAA No. Peru

O: 5MAY2021 07:02:59 2.5S 80.4W ML=4.1 EMSC NEAR COAST OF ECUADOR

P: 5MAY2021 133418 1.0S 81.0W 4.0-5.7 ABAAA Ecuador

O: 4MAY2021 08:01:47 4.8S 76.5W mb=4.6 EMSC NORTHERN PERU

P: 1MAY2021 133426 6.0S 76.0W 4.0-5.4 BBAAA No. Peru

O: 4MAY2021 13:50:54 14.0N 93.1W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 6MAY2021 133443 14.0N 93.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 04MAY2021 18:45:37 15.4N 94.6W ML=3.7 EMSC OFFSHORE OAXACA, MEXICO

O: 4MAY2021 07:27:16 15.4N 94.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 5MAY2021 133444 16.0N 95.0W 3.5-5.1 AAAAA Chiapas, Mexico

O: 4MAY2021 16:04:06 15.9S 75.4W mb=4.7 EMSC NEAR COAST OF CENTRAL PERU

P: 4MAY2021 133643 16.0S 74.0W 4.0-5.5 AABAA So. Peru/Bolivia

O: 4MAY2021 07:19:16 18.3N 63.0W ML=3.7 EMSC ANGUILLA REGION, LEEWARD ISLAN

P: 3MAY2021 133450 19.0N 65.0W 3.0-5.1 AABAA Leeward Islands

P: 7MAY2021 133450 18.0N 65.0W 3.0-5.1 BABAA Leeward Islands

NEIC reported this earthquake of M 3.7 in Anguilla, Leeward Islands was felt with intensity II-III in the area(s) of Anguilla, Leeward Islands in Marigot, Saint Martin, Guadeloupe, The Valley, Anguilla (V) and Orincess Quarter, Sint Maarten, Netherlands Antilles.

It was preceded by an M 3.3 foreshock which was felt in the same area.

O: 4MAY2021 11:57:06 19.5N 68.7W ML=3.0 EMSC DOMINICAN REPUBLIC REGION

P: 5MAY2021 133469 20.0N 68.0W 3.0-4.7 AAAAA Bahamas/No. Caribbean

O: 4MAY2021 19:54:31 22.5S 67.7W mb=4.4 EMSC POTOSI, BOLIVIA

P: 7MAY2021 133652 23.0S 67.0W 4.0-5.6 BAAAA Argentina

O: 4MAY2021 17:52:55 22.9S 68.8W mb=4.3 EMSC ANTOFAGASTA, CHILE

P: 4MAY2021 133659 24.0S 69.0W 4.0-5.4 ABAAA Coast No. Chile

P: 7MAY2021 133658 23.0S 69.0W 4.0-5.6 BAAAA Coast No. Chile

O: 4MAY2021 13:15:47 26.7S 67.7W ML=4.6 EMSC CATAMARCA, ARGENTINA

P: 5MAY2021 133654 28.0S 67.0W 4.0-5.5 ABAAA Argentina

O: 4MAY2021 15:18:22 33.9S 72.4W mb=4.7 EMSC OFFSHORE O'HIGGINS, CHILE

O: 4MAY2021 08:54:10 34.6S 73.1W mb=4.1 EMSC OFFSHORE MAULE, CHILE

P: 7MAY2021 133683 34.0S 73.0W 4.0-5.7 BAAAA Central Chile

NEIC reported this earthquake of M 4.7 in O'Higgins, Chile was felt with intensity II-III in the area(s) of San Antonio, Valparaiso, Chile.

AFRICA AND EUROPE

O: 4MAY2021 15:02:02 34.0N 25.6E mb=4.4 EMSC CRETE, GREECE

P: 5MAY2021 133508 34.0N 26.0E 3.0-5.1 AAAAA Crete

EMSC reported an earthquake of M 4.1 in Western Turkey was felt with intensity II-III in the area(s) of Western Turkey at Biga, Marmara, Erkek, Bandirma, and within about 75 km of the epicenter.

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

SOUTHWEST PACIFIC

O: 5MAY2021 05:05:51 15.5S 173.6W mb=4.6 EMSC TONGA

P: 5MAY2021 133640 15.0S 175.0W 4.0-5.7 AABAA Samoa Islands

O: 05MAY2021 01:17:28 20.6S 173.8W mb=5.2 EMSC TONGA

O: 05MAY2021 05:16:35 20.7S 173.3W mb=5.0 EMSC TONGA

O: 4MAY2021 19:51:43 20.8S 173.8W Mw=5.5 EMSC TONGA

P: 4MAY2021 133672 20.0S 174.0W 4.0-5.5 AAAAA Tonga Islands

O: 4MAY2021 13:33:22 17.6S 167.9E Mw=5.0 EMSC VANUATU

P: 3MAY2021 133649 17.0S 167.0E 4.0-5.6 AAAAA Vanuatu Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 4MAY2021 13:36:02 36.0S 178.3E ML=3.5 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 4MAY2021 133691 37.0S 180.0E 3.5-5.1 AABAA E. of North Islands N.Z.

O: 5MAY2021 03:58:19 54.6S 158.9E mb=4.9 EMSC MACQUARIE ISLAND REGION

JAPAN AND KURIL ISLANDS

O: 4MAY2021 22:28:09 42.4N 144.6E mb=4.3 EMSC HOKKAIDO, JAPAN REGION

P: 1MAY2021 133559 43.0N 145.0E 3.5-5.5 BAAAA Hokkaido, Japan

O: 4MAY2021 18:10:43 37.2N 141.8E mb=5.3 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 3MAY2021 133525 38.0N 141.0E 4.0-6.6 AAAAA Off East Coast Honshu

NEIC reported this earthquake of M 4.9 off eastern Honshu, Japan was felt with intensity II-III in the area(s) of Honshu, Japan in Miyagi Prefecture.

O: 4MAY2021 19:32:59 43.3N 146.6E mb=4.8 EMSC KURIL ISLANDS

P: 1MAY2021 133559 43.0N 145.0E 3.5-5.5 BAAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 4MAY2021 14:16:23 31.4N 115.5W ML=3.7 EMSC BAJA CALIFORNIA, MEXICO

P: 4MAY2021 133530 32.1N 116.4W 2.5-4.4 AAAAA So. California

O: 4MAY2021 19:23:52 33.8N 118.5W ML=2.6 EMSC SANTA MONICA BAY, CALIFORNIA

P: 4MAY2021 133534 34.3N 118.5W 2.5-5.2 AAAAA So. California

NEIC reported this earthquake of M 2.6 in Santa Monica Bay, California was felt with intensity II-III in the area(s) of Santa Monica Bay, California in Hermosa Beach, Manhattan Beach, Redondo Beach, El Segundo, Torrance, Palos Verdes, Rancho Palos and Playa del Rey.

O: 4MAY2021 13:31:44 35.8N 116.6W ML=2.3 EMSC SOUTHERN CALIFORNIA

O: 4MAY2021 20:49:55 35.9N 115.2W ml=2.1 EMSC NEVADA

P: 2MAY2021 133538 35.5N 116.4W 2.5-4.5 AAAAA So. California

O: 4MAY2021 12:36:14 36.7N 121.0W Ml=3.4 EMSC CENTRAL CALIFORNIA

P: 2MAY2021 133499 36.7N 121.4W 2.5-4.5 AAAAA Central California

NEIC reported this earthquake of M 3.4 in Central California was felt with intensity II-III in the area(s) of Central California in Los Banos, Hollister and San Juan Bautista.

O: 04MAY2021 20:40:12 38.2N 117.7W ml=2.2 EMSC NEVADA

O: 05MAY2021 01:10:08 38.2N 117.7W ml=2.0 EMSC NEVADA

O: 05MAY2021 06:21:25 38.2N 117.8W ml=2.5 EMSC NEVADA

O: 4MAY2021 17:36:03 38.2N 117.7W ML=2.4 EMSC NEVADA

P: 4MAY2021 133495 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area

O: 4MAY2021 13:55:59 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 4MAY2021 133501 38.9N 122.8W 2.5-4.6 AAAAA Central California

O: 4MAY2021 12:49:26 40.2N 123.9W Md=2.0 EMSC NORTHERN CALIFORNIA

O: 04MAY2021 07:37:39 40.9N 124.2W ML=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 4MAY2021 21:38:48 40.4N 124.7W ML=2.3 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 4MAY2021 133576 40.2N 124.2W 2.5-4.5 AAAAA Off Coast of No. Calif

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

ALASKA

O: 4MAY2021 16:47:43 52.4N 170.6W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 4MAY2021 133597 52.1N 171.3W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians

O: 04MAY2021 07:31:50 58.4N 154.8W ML=3.3 EMSC ALASKA PENINSULA

P: 4MAY2021 133619 60.2N 153.2W 3.2-4.9 ABAAA Central Alaska

O: 5MAY2021 00:23:38 60.1N 151.7W ML=3.8 EMSC KENAI PENINSULA, ALASKA

P: 2MAY2021 133620 60.5N 151.5W 3.2-4.9 AAAAA Central Alaska

NEIC reported this earthquake of M 3.6 in the Kenai Peninsula, Alaska was felt with intensity II-III in the area(s) of the Kenai Peninsula, Alaska at Ninilchik, Kasilof, Homer, Sodotna, Kenai, Seward and Anchorage.

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 4MAY2021 13:38:34 45.4N 117.6W Ml=2.2 EMSC OREGON

P: 6MAY2021 133568 47.5N 115.8W 2.0-4.1 ABAAA Montana/Idaho

O: 4MAY2021 18:21:16 46.7N 121.1W Md=2.2 EMSC WASHINGTON

P: 2MAY2021 133588 46.9N 122.0W 2.0-3.9 AAAAA Washington state, U.S.

O: 4MAY2021 08:35:29 49.4N 127.8W MB=3.0 ECAN Port Alice, BC

O: 4MAY2021 08:35:29 49.4N 127.8W ML=3.0 EMSC VANCOUVER ISLAND, CANADA REGIO

P: 4MAY2021 133587 49.3N 129.0W 2.8-5.3 AAAAA Vancouver Island area

O: 4MAY2021 20:59:21 47.6N 122.1W Md=2.7 EMSC SEATTLE-TACOMA AREA, WASHINGTO

P: 1MAY2021 133588 47.5N 121.8W 2.0-4.2 BAAAA Washington state, U.S.

ROCKY MOUNTAINS REGION

O: 4MAY2021 21:07:09 43.3N 111.1W Ml=2.3 EMSC SOUTHERN IDAHO

P: 4MAY2021 133590 43.2N 111.0W 2.0-4.3 AAAAA Yellowstone/Wyoming

O: 04MAY2021 13:59:31 44.3N 115.1W Ml=2.2 EMSC SOUTHERN IDAHO

O: 04MAY2021 23:02:59 44.5N 115.2W Ml=2.1 EMSC SOUTHERN IDAHO

O: 4MAY2021 10:52:53 44.3N 115.1W Ml=2.3 EMSC SOUTHERN IDAHO

P: 4MAY2021 133566 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho

O: 4MAY2021 17:55:15 47.4N 116.6W Ml=2.1 EMSC NORTHERN IDAHO

P: 6MAY2021 133568 47.5N 115.8W 2.0-4.1 AAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 4MAY2021 21:59:24 35.2N 95.3W mb=2.4 EMSC OKLAHOMA

P: 5MAY2021 133546 35.0N 96.0W 2.0-4.1 AAAAA Southern Plains

O: 5MAY2021 03:36:25 36.7N 97.7W ML=2.2 EMSC OKLAHOMA

P: 9MAY2021 133546 36.0N 97.0W 2.0-4.5 BAAAA Southern Plains

O: 4MAY2021 10:06:09 46.8N 78.2W MB=2.6 ECAN Mattawa, ON

P: 4MAY2021 133579 46.0N 81.0W 2.0-4.0 AACAA Ohio/Lake Erie

O: 3MAY2021 18:48:00 50.8N 64.1W MB=1.9 ECAN Mingan, QC

P: 5MAY2021 133558 49.0N 66.0W 2.0-3.9 ABBAA E. of Maine

O: 3MAY2021 08:17:07 44.4N 77.0W MB=1.7 ECAN Napanee, ON

P: 2MAY2021 133572 43.0N 78.0W 2.0-4.2 ABAAA New York State

HAWAII

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

MODERATE QUAKE FELT IN MONGOLIA AND SIBERIA

EARTHQUAKE SUMMARY FOR MAY 3, 2021

The strongest earthquake in the world today was an M 5.6 on the Russia-Mongolia border. NEIC reported it was felt with intensity III in Irkutsk, Russia and in Mongolia at Zuumharaa and Ulaanbaatar. This is the first earthquake within about 200 km of this epicenter with M>=5.6 since an M 6.7 on January 11, 2021 and is probably an aftershock of that event, the largest in the area in at least 30 years. An M 5.6 occurred about 300 km to the northeast of this event on September 21, 2020, the first in this larger region since an M 6.2 on August 27, 2008. At the time of the event in January, 2021, this summary noted in this regard:

"The only earthquake within about 300 km of this epicenter of equal or larger magnitude in this region near the Russia-Mongolia border was an M 6.7 about 300 km to the west on February 26, 2012 - the only such event in this region in the past 30 years. This epicenter is at the seventh node (52 degrees) from both the Dodecanese Islands of October 30, 2020 and from the M 7.6 in the Alaska Peninsula of October 19, 2020. It was probably promoted by energy from these sources. One of the strongest earthquakes in this area in recent times occurred as an M 7.5 on January 12, 1862 .." (January 12, 2021)

Forecast 133611 had expected today's event in southern Siberia within about

150 km of this epicenter was likely around May 1.

O: 03MAY2021 08:58:52 51.4N 100.4E mb=4.0 EMSC RUSSIA-MONGOLIA BORDER REGION

O: 03MAY2021 14:11:38 51.4N 100.4E mb=4.2 EMSC RUSSIA-MONGOLIA BORDER REGION

O: 3MAY2021 08:46:38 51.3N 100.5E Mw=5.6 EMSC RUSSIA-MONGOLIA BORDER REGION

P: 1MAY2021 133611 51.0N 98.0E 3.0-4.7 AABAA So. Siberia

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 3MAY2021 22:44:48 23.4N 94.1E ML=3.9 EMSC MYANMAR

P: 3MAY2021 133477 23.0N 94.0E 4.0-5.4 AAAAA Myanmar

O: 3MAY2021 11:42:39 36.7N 94.1E mb=4.6 EMSC NORTHERN QINGHAI, CHINA

P: 26APR2021 133254 36.0N 94.0E 3.8-5.2 CAAAA Xizang

O: 3MAY2021 21:57:14 38.2N 75.6E mb=4.2 EMSC SOUTHERN XINJIANG, CHINA

O: 3MAY2021 19:13:39 38.6N 73.4E mb=4.5 EMSC TAJIKISTAN

P: 7MAY2021 133510 38.0N 74.0E 3.8-5.5 BAAAA Hindu Kush/Pakistan

NEIC reported this earthquake of M 4.5 in Tajikistan was felt with intensity II-III in the area(s) of Tajikistan at Murgob.

O: 03MAY2021 08:58:52 51.4N 100.4E mb=4.0 EMSC RUSSIA-MONGOLIA BORDER REGION

O: 03MAY2021 14:11:38 51.4N 100.4E mb=4.2 EMSC RUSSIA-MONGOLIA BORDER REGION

O: 3MAY2021 08:46:38 51.3N 100.5E Mw=5.6 EMSC RUSSIA-MONGOLIA BORDER REGION

P: 1MAY2021 133611 51.0N 98.0E 3.0-4.7 AABAA So. Siberia

O: 3MAY2021 15:19:57 53.8N 160.5E mb=4.5 EMSC NEAR EAST COAST OF KAMCHATKA

P: 5MAY2021 133599 53.0N 160.0E 4.0-5.4 AAAAA E. of Kamchatka

INDONESIA AND PHILIPPINES

O: 3MAY2021 14:11:25 0.3N 96.6E ML=4.6 EMSC NIAS REGION, INDONESIA

P: 3MAY2021 133412 2.0N 98.0E 4.0-5.6 ABBAA So. Sumatera

P: 9MAY2021 133411 1.0N 97.0E 4.0-5.7 CAAAA Nicobar Islands

O: 3MAY2021 12:50:34 1.2N 126.5E mb=4.6 EMSC MOLUCCA SEA

P: 1MAY2021 133409 1.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines

O: 3MAY2021 14:40:16 1.6S 120.1E ML=4.5 EMSC SULAWESI, INDONESIA

P: 4MAY2021 133398 0.0N 120.0E 4.0-5.7 ABAAA Celebes Sea

O: 4MAY2021 05:23:47 3.1S 136.0E ML=4.7 EMSC PAPUA, INDONESIA

O: 04MAY2021 06:38:58 3.1S 135.9E ML=4.5 EMSC PAPUA, INDONESIA

P: 2MAY2021 133437 4.0S 136.0E 4.0-5.4 AAAAA West Irian, PNG

O: 03MAY2021 15:26:48 4.3N 126.8E ML=4.0 EMSC KEPULAUAN TALAUD, INDONESIA

O: 03MAY2021 15:21:55 4.9N 127.0E ML=4.4 EMSC KEPULAUAN TALAUD, INDONESIA

O: 3MAY2021 16:30:20 4.9N 126.8E ML=4.2 EMSC KEPULAUAN TALAUD, INDONESIA

P: 2MAY2021 133410 5.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines

O: 3MAY2021 22:59:24 6.5S 130.2E ML=4.3 EMSC BANDA SEA

P: 2MAY2021 133438 6.0S 131.0E 4.0-5.5 AAAAA West Irian, PNG

CENTRAL AND SOUTH AMERICA

O: 3MAY2021 11:46:48 6.2S 81.4W mb=4.6 EMSC NEAR COAST OF NORTHERN PERU

P: 3MAY2021 133427 9.0S 81.0W 4.0-5.8 ACAAA No. Peru

O: 3MAY2021 20:47:21 15.1S 72.7W mb=4.6 EMSC SOUTHERN PERU

P: 4MAY2021 133637 15.0S 71.0W 4.0-5.6 AABAA Central Peru

O: 4MAY2021 02:44:01 14.3S 72.8W ML=4.0 EMSC CENTRAL PERU

P: 4MAY2021 133637 15.0S 71.0W 4.0-5.6 AABAA Central Peru

O: 3MAY2021 07:05:42 16.0N 98.4W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

O: 03MAY2021 06:58:35 16.1N 98.4W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

P: 1MAY2021 133461 17.0N 98.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 3MAY2021 20:59:05 17.3N 95.1W ML=4.1 EMSC OAXACA, MEXICO

P: 5MAY2021 133444 16.0N 95.0W 3.5-5.1 ABAAA Chiapas, Mexico

O: 3MAY2021 21:35:22 18.5N 68.0W Md=3.3 EMSC DOMINICAN REPUBLIC REGION

O: 03MAY2021 18:19:08 18.9N 67.7W Md=3.1 EMSC PUERTO RICO REGION

P: 5MAY2021 133463 18.0N 67.0W 3.4-5.0 AAAAA Puerto Rico

O: 3MAY2021 15:49:56 19.4S 69.4W mb=4.0 EMSC TARAPACA, CHILE

P: 4MAY2021 133671 20.0S 71.0W 4.0-5.4 AABAA So. Peru/Bolivia

P: 5MAY2021 133643 18.0S 69.0W 4.0-5.4 ABAAA So. Peru/Bolivia

NEIC reported this earthquake of M 4.0 in Tarapaca, Chile was felt with intensity II-III in the area(s) of Tarapaca, Chile at Iquique.

AFRICA AND EUROPE

O: 3MAY2021 22:57:04 46.6N 13.9E ML=2.2 EMSC AUSTRIA

P: 3MAY2021 133554 46.0N 13.0E 3.0-5.3 AAAAA Austria

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

SOUTHWEST PACIFIC

O: 3MAY2021 13:58:10 14.4S 167.4E mb=4.5 EMSC VANUATU

P: 6MAY2021 133649 15.0S 167.0E 4.0-5.4 BAAAA Vanuatu Islands

O: 3MAY2021 07:46:55 16.5S 174.4W mb=4.5 EMSC TONGA

P: 5MAY2021 133640 15.0S 175.0W 4.0-5.7 ABAAA Samoa Islands

O: 3MAY2021 19:29:37 20.6S 178.3W mb=4.6 EMSC FIJI REGION

P: 6MAY2021 133674 20.0S 179.0W 4.0-5.7 BAAAA Tonga Islands

O: 3MAY2021 21:05:26 26.2S 178.8E ML=4.4 EMSC SOUTH OF FIJI ISLANDS

P: 3MAY2021 133677 25.0S 179.0E 4.0-5.4 ABAAA Tonga/Fiji

O: 03MAY2021 16:07:54 21.9S 177.5W mb=4.8 EMSC FIJI REGION

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

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

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

JAPAN AND KURIL ISLANDS

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

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 4MAY2021 03:06:32 33.2N 116.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 2MAY2021 133530 32.4N 115.8W 2.5-4.4 AAAAA So. California

O: 3MAY2021 16:36:04 35.9N 117.7W Ml=2.3 EMSC CENTRAL CALIFORNIA

P: 4MAY2021 133491 36.1N 118.1W 2.5-5.1 AAAAA California/Nevada area

P: 6MAY2021 133540 35.8N 117.6W 2.5-5.0 BAAAA So. California

O: 3MAY2021 20:24:54 36.3N 119.7W Md=2.5 EMSC CENTRAL CALIFORNIA

P: 2MAY2021 133498 36.1N 120.1W 2.5-4.8 AAAAA Central California

O: 3MAY2021 22:28:59 36.5N 118.0W Ml=2.0 EMSC CENTRAL CALIFORNIA

P: 4MAY2021 133491 36.1N 118.1W 2.5-5.1 AAAAA California/Nevada area

P: 7MAY2021 133491 36.3N 118.1W 2.5-5.1 BAAAA California/Nevada area

O: 4MAY2021 05:05:33 36.6N 121.3W Md=2.3 EMSC CENTRAL CALIFORNIA

P: 2MAY2021 133499 36.7N 121.4W 2.5-4.5 AAAAA Central California

O: 04MAY2021 04:48:29 37.5N 119.4W Md=2.4 EMSC CENTRAL CALIFORNIA

O: 3MAY2021 21:52:08 37.5N 119.4W ML=2.1 EMSC CENTRAL CALIFORNIA

P: 3MAY2021 133494 37.3N 119.4W 2.5-4.7 AAAAA California/Nevada area

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 Yosemite National Park.

O: 03MAY2021 07:13:44 38.2N 117.7W ml=2.0 EMSC NEVADA

O: 03MAY2021 10:34:01 38.2N 117.7W ml=2.2 EMSC NEVADA

O: 03MAY2021 16:35:00 38.2N 117.8W ML=2.4 EMSC NEVADA

O: 03MAY2021 20:42:25 38.2N 117.7W ml=2.2 EMSC NEVADA

O: 3MAY2021 22:59:15 38.2N 117.7W ml=2.1 EMSC NEVADA

P: 4MAY2021 133495 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area

O: 3MAY2021 09:19:44 39.7N 123.4W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 7MAY2021 133502 39.3N 123.2W 2.5-4.6 BAAAA Central California

NEIC reported this earthquake of M 2.5 in northern California was felt with intensity II-III in the area(s) of northern California at Orland.

ALASKA

O: 4MAY2021 02:27:27 51.6N 175.3W ml=3.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 2MAY2021 133596 50.6N 174.7W 3.5-5.3 AAAAA Andreanoff Isls, Aleutians

O: 4MAY2021 02:46:17 56.0N 156.4W ML=3.1 EMSC ALASKA PENINSULA

P: 5MAY2021 133593 54.7N 156.9W 3.5-5.1 ABAAA Alaska Peninsula

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 1MAY2021 20:41:35 50.7N 114.9W MB=3.1 ECAN Canmore, AB

P: 30APR2021 133302 52.0N 115.0W 2.0-4.6 ABAAA Alberta

ROCKY MOUNTAINS REGION

O: 3MAY2021 10:46:54 31.7N 104.2W ML=3.4 EMSC WESTERN TEXAS

P: 5MAY2021 133528 32.0N 104.6W 2.0-3.9 AAAAA SW U.S.A

O: 03MAY2021 07:40:50 44.5N 115.2W Ml=2.2 EMSC SOUTHERN IDAHO

O: 3MAY2021 17:51:47 44.3N 115.2W Ml=2.2 EMSC SOUTHERN IDAHO

P: 4MAY2021 133566 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 3MAY2021 08:17:07 44.4N 77.0W MB=1.7 ECAN Napanee, ON

P: 2MAY2021 133572 43.0N 78.0W 2.0-4.2 ABAAA New York State

HAWAII

O: 03MAY2021 22:44:54 19.2N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII

O: 3MAY2021 22:42:51 19.2N 155.4W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII

P: 4MAY2021 133448 18.8N 155.2W 3.0-4.4 AAAAA Hawaii

STRONG QUAKE NORTHEAST OF TAIWAN FELT IN OKINAWA, JAPAN AND TAIWAN

EARTHQUAKE SUMMARY FOR MAY 2, 2021

The strongest earthquake in the world today was an M 5.5 (EMSC) - M 6.4 (CWB) which occurred northeast of Taiwan in the Ryukyu Islands of Japan. NEIC reported it was felt in Taiwan in Taipei and Taoyuan and in Okinawa, Japan at Chatan, Okinawa and Ishikawa. CWB reported this earthquake was felt with intensity II in Hualien and Taitung, I in Tainan, Yunlin, Chiayi, Changhua, Miaoli, Taichung, Nantou, Hsinchu, Yilan Counties, Taiwan. An earthquake of M 5.9 hit about 150 km northeast of this on March 25, 2021 with another of M 6.1 about 200 km southwest of this on December 10, 2020 but the last within about 150 km of this with M>=5.5 was an M 5.7 on February 2, 2016. A major earthquake of M 7.4 hit southwest of today's event exactly 23 years ago on May 3, 1998. It generated a local tsunami (see history section of this summary). The last event in the general area of M>=6.4 was an M 6.4 on May 31, 2016. Forecast 133486 had expected today's event in this area was likely around May 3. This earthquake occurred near local solar noon at a longitude which was expected to see maximum tidal stresses with the past full moon and may have been promoted by those tides. The seismic forecast in this summary regarding this full moon had read:

"The full moon arrived on April 27, 2021 at 03:31 UT. Longitudes which were sub-solar (local solar noon) at this time were near 130 East Longitude while those near local solar midnight area near 50 West longitude. Those in the west include the Atlantic Ocean as far as the eastern Caribbean and the Shetland and South Sandwich Islands and in the east in western Japan, Taiwan, the Philippines and Central Indonesia. These areas may see enhanced seismicity within about 3 days of the full moon." (April 27, 2021)

O: 3MAY2021 05:07:29 25.8N 123.9E Mw=5.5 EMSC NORTHEAST OF TAIWAN

O: 3MAY2021 05:07:31 25.5N 123.9E ML=6.4 TAI Hualien, Taiwan

P: 3MAY2021 133485 24.0N 124.0E 4.0-5.5 ABAAA Taiwan

An earthquake of M 5.6 (EMSC) -5.7 (BMG) also occurred today in the area of Sumatra near Mentawai. BMG reported it was felt with intensity III-IV in the epicentral area of Mentawai. The last earthquake of M>=5.6 in this area was an M 5.6 north of this of March 5 following the M 8.1 in the Kermadec Islands of March 4, 2021 and prior to that an M 5.9 on November 17, 2020. Forecast 133431 had expected today's event within about 100 km was likely around May 4.

O: 2MAY2021 17:46:41 2.3S 99.8E Mw=5.6 EMSC KEP. MENTAWAI REGION, INDONESI

P: 4MAY2021 133431 2.0S 99.0E 4.0-5.4 AAAAA So. of Sumatera

The strongest earthquake in the U.S. or Canada today was an M 3.8 in the Alaska Peninsula west of the aftershocks of the M 7.6 of October, 2020. The last earthquake equal or greater magnitude in this region occurred hours before the M 7.3 near North Island New Zealand and the 8.1 in the Kermadec Islands on March 3, 2021 with M 4.3 and 3.9. Forecasts 133319 and 133614 had expected this activity was likely in the Unimak Islands within about 50 km of this epicenter in late April or early May.

O: 03MAY2021 00:28:53 54.2N 161.3W mb=3.8 EMSC ALASKA PENINSULA

O: 3MAY2021 00:16:47 54.2N 161.3W mb=3.4 EMSC ALASKA PENINSULA

P: 2MAY2021 133614 54.1N 164.4W 3.5-5.1 AABAA Unimak Islands, Aleutians

P: 24APR2021 133319 54.7N 161.2W 3.5-5.1 CAAAA Unimak Islands, Aleutians

An unusual earthquake of M 2.9 occurred in southeastern Brazil near Minas Gerais today where it was lightly felt. This is the first earthquake within about 500 km of this epicenter reported by NEIC since an M 4.2 on May 19, 2012 and prior to that an M 4.1 on May 22, 1990 about 400 km to the northwest of today's epicenter.

O: 2MAY2021 13:53:34 19.7S 44.0W ML=2.9 EMSC MINAS GERAIS, BRAZIL

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 2MAY2021 11:19:04 24.0N 65.0E mb=4.4 EMSC OFF COAST OF PAKISTAN

P: 7MAY2021 133474 24.0N 70.0E 3.5-5.0 BACAA India

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

INDONESIA AND PHILIPPINES

O: 2MAY2021 09:08:14 1.6S 120.1E ML=4.8 EMSC SULAWESI, INDONESIA

P: 4MAY2021 133398 0.0N 120.0E 4.0-5.7 ABAAA Celebes Sea

O: 2MAY2021 17:46:41 2.3S 99.8E Mw=5.6 EMSC KEP. MENTAWAI REGION, INDONESI

P: 4MAY2021 133431 2.0S 99.0E 4.0-5.4 AAAAA So. of Sumatera

O: 2MAY2021 13:04:57 2.6S 127.2E ML=4.0 EMSC CERAM SEA, INDONESIA

P: 4MAY2021 133417 3.0S 126.0E 4.0-5.4 AAAAA Ceram area

O: 2MAY2021 23:24:40 3.3S 130.5E mb=4.9 EMSC SERAM, INDONESIA

P: 1MAY2021 133417 4.0S 128.0E 4.0-5.4 AABAA Ceram area

O: 2MAY2021 15:33:58 3.6S 119.7E ML=4.0 EMSC SULAWESI, INDONESIA

P: 5MAY2021 133433 1.0S 122.0E 4.0-5.5 BCBAA Sulawesi area

O: 2MAY2021 20:49:42 5.4N 94.7E mb=5.0 EMSC NORTHERN SUMATRA, INDONESIA

P: 3MAY2021 133411 6.0N 93.0E 4.0-5.5 AABAA Nicobar Islands

O: 2MAY2021 19:26:03 5.6S 145.5E mb=4.3 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 27APR2021 133126 5.0S 146.0E 4.0-5.4 BAAAA New Ireland

O: 2MAY2021 12:07:31 6.1S 103.3E mb=4.9 EMSC SOUTHWEST OF SUMATRA, INDONESI

P: 2MAY2021 133431 5.0S 103.0E 4.0-5.6 ABAAA So. of Sumatera

O: 2MAY2021 15:02:02 6.5S 129.9E mb=4.6 EMSC BANDA SEA

P: 5MAY2021 133438 7.0S 130.0E 4.0-5.4 BAAAA West Irian, PNG

O: 2MAY2021 09:33:53 6.6S 147.5E mb=4.6 EMSC EASTERN NEW GUINEA REG., P.N.G

P: 27APR2021 133126 5.0S 148.0E 4.0-5.6 BBAAA New Ireland

O: 2MAY2021 22:17:59 9.9S 113.8E ML=4.1 EMSC SOUTH OF JAVA, INDONESIA

P: 30APR2021 133131 9.0S 114.0E 4.0-5.6 AAAAA So. of Bali

O: 2MAY2021 23:01:21 17.9N 147.1E mb=5.0 EMSC MARIANA ISLANDS REGION

P: 29APR2021 133161 17.0N 147.0E 4.0-5.4 BAAAA No. Marianas

O: 3MAY2021 05:26:46 21.7N 143.0E mb=4.2 EMSC MARIANA ISLANDS REGION

P: 3MAY2021 133486 22.0N 145.0E 4.0-5.7 AABAA Volcano Islands

CENTRAL AND SOUTH AMERICA

O: 3MAY2021 06:58:35 16.1N 98.4W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO

P: 1MAY2021 133461 17.0N 98.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 3MAY2021 06:04:33 17.6N 103.2W ML=4.2 EMSC OFFSHORE MICHOACAN, MEXICO

P: 3MAY2021 133454 18.0N 102.0W 3.5-5.5 AAAAA Michoacan, Mexico

O: 2MAY2021 13:53:34 19.7S 44.0W ML=2.9 EMSC MINAS GERAIS, BRAZIL

O: 2MAY2021 11:37:39 30.1S 71.4W Mw=4.6 EMSC OFFSHORE COQUIMBO, CHILE

O: 2MAY2021 11:37 30.2S 71.5W mb=4.6 GUC Coquimbo at La Higuera, III in

P: 2MAY2021 133688 30.0S 70.0W 4.0-5.6 AAAAA Coast Central Chile

GUC reported this earthquakes was felt with intensity VI in Coquimbo at La Higuera, III in Andacollo, Coquimbo, La Serena and Monte Patria, Chile.

NEIC reported this earthquake of M 4.3 in Coquimbo, Chile was felt with intensity II-III in the area(s) of Coquimbo, Chile at La Serena.

O: 2MAY2021 09:55:12 27.9N 112.0W ML=3.3 EMSC GULF OF CALIFORNIA

P: 30APR2021 133175 28.0N 112.0W 3.5-5.0 AAAAA Gulf of California

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

AFRICA AND EUROPE

O: 2MAY2021 09:16:21 36.6N 23.0E mb=4.2 EMSC SOUTHERN GREECE

P: 3MAY2021 133519 37.0N 21.0E 3.0-4.8 AABAA No. Greece

P: 29APR2021 133190 35.0N 24.0E 3.0-4.7 BBAAA Aegean Sea

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

SOUTHWEST PACIFIC

O: 2MAY2021 09:15:11 10.6S 166.0E mb=4.8 EMSC SANTA CRUZ ISLANDS

O: 2MAY2021 17:15:10 13.2S 167.2E mb=4.7 EMSC VANUATU

P: 5MAY2021 133649 12.0S 167.0E 4.0-5.8 BBAAA Vanuatu Islands

O: 3MAY2021 04:42:31 18.0S 178.5W mb=4.4 EMSC FIJI REGION

P: 3MAY2021 133646 17.0S 177.0W 4.0-5.7 AABAA Tonga Islands

O: 2MAY2021 10:13:15 20.6S 177.7W mb=4.4 EMSC FIJI REGION

P: 28APR2021 133369 21.0S 177.0W 4.0-5.7 BAAAA Tonga Islands

O: 3MAY2021 03:54:32 18.3S 173.2W mb=5.1 EMSC TONGA

P: 4MAY2021 133672 20.0S 174.0W 4.0-5.5 ABAAA Tonga Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 2MAY2021 21:05:16 30.7S 177.2W mb=4.6 EMSC KERMADEC ISLANDS, NEW ZEALAND

P: 5MAY2021 133692 30.0S 177.0W 4.0-5.4 BAAAA No. Kermadec Islands

O: 2MAY2021 10:15:29 32.2S 179.1E ML=3.8 EMSC SOUTH OF KERMADEC ISLANDS

P: 5MAY2021 133700 32.0S 178.0W 4.0-5.5 BABAA So. Kermadec Islands

O: 2MAY2021 06:59:14 36.8S 177.5E ML=3.7 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 3MAY2021 133695 38.0S 178.0E 3.0-4.6 ABAAA North Island, N.Z.

O: 03MAY2021 05:28:11 37.4S 179.8E ML=3.6 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 02MAY2021 17:30:00 37.5S 179.9E ML=4.5 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 2MAY2021 18:51:20 37.5S 180.0W ML=3.8 EMSC OFF E. COAST OF N. ISLAND, N.Z

O: 2MAY2021 22:10:28 37.6S 179.9E ML=3.7 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 4MAY2021 133691 37.0S 180.0E 3.5-5.1 AAAAA E. of North Islands N.Z.

JAPAN AND KURIL ISLANDS

O: 3MAY2021 05:07:29 25.8N 123.9E Mw=5.5 EMSC NORTHEAST OF TAIWAN

O: 3MAY2021 06:07:31 25.5N 123.9E ML=6.4 TAI Hualien, Taiwan

P: 3MAY2021 133485 24.0N 124.0E 4.0-5.5 ABAAA Taiwan

O: 3MAY2021 05:29:30 38.2N 141.7E ML=3.8 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 3MAY2021 133525 38.0N 141.0E 4.0-6.6 AAAAA Off East Coast Honshu

O: 2MAY2021 23:00:30 42.7N 143.1E ML=4.0 EMSC HOKKAIDO, JAPAN REGION

P: 28APR2021 133263 43.0N 145.0E 3.5-5.6 BABAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 2MAY2021 19:55:23 31.7N 115.9W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO

P: 4MAY2021 133530 32.1N 116.4W 2.5-4.4 AAAAA So. California

O: 2MAY2021 16:25:42 33.0N 115.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA

P: 2MAY2021 133530 32.4N 115.8W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 2.5 in Southern California was felt with intensity II-III in the area(s) of Southern California at Brawley.

O: 2MAY2021 22:31:19 36.7N 120.9W Md=2.2 EMSC CENTRAL CALIFORNIA

P: 2MAY2021 133499 36.7N 121.4W 2.5-4.5 AAAAA Central California

O: 2MAY2021 20:51:29 37.8N 122.0W Md=2.2 EMSC SAN FRANCISCO BAY AREA, CALIF.

P: 4MAY2021 133500 38.0N 122.3W 2.5-4.8 AAAAA Central California

O: 3MAY2021 01:58:32 38.2N 117.7W ml=2.4 EMSC NEVADA

P: 4MAY2021 133495 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area

O: 3MAY2021 01:38:51 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

O: 03MAY2021 06:35:52 38.8N 122.8W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 4MAY2021 133501 38.9N 122.8W 2.5-4.6 AAAAA Central California

ALASKA

O: 03MAY2021 00:28:53 54.2N 161.3W mb=3.8 EMSC ALASKA PENINSULA

O: 3MAY2021 00:16:47 54.2N 161.3W mb=3.4 EMSC ALASKA PENINSULA

P: 2MAY2021 133614 54.1N 164.4W 3.5-5.1 AABAA Unimak Islands, Aleutians

O: 2MAY2021 20:00:43 61.8N 149.8W ML=3.1 EMSC SOUTHERN ALASKA

P: 6MAY2021 133622 62.8N 149.1W 3.2-4.9 BAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

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

ROCKY MOUNTAINS REGION

O: 2MAY2021 22:10:44 42.0N 111.9W ML=2.4 EMSC SOUTHERN IDAHO

P: 27APR2021 133298 43.0N 111.5W 2.0-4.1 BAAAA Yellowstone/Wyoming

EASTERN U.S./CANADA

O: 03MAY2021 00:07:47 34.8N 97.7W ML=2.1 EMSC OKLAHOMA

O: 03MAY2021 00:45:13 34.8N 97.7W ML=2.6 EMSC OKLAHOMA

O: 2MAY2021 11:49:22 34.7N 97.7W ML=2.1 EMSC OKLAHOMA

P: 2MAY2021 133545 34.0N 97.0W 2.0-4.0 AAAAA Southern Plains

O: 2MAY2021 11:18:01 36.3N 97.5W mb=2.2 EMSC OKLAHOMA

P: 30APR2021 133246 36.0N 97.0W 2.0-4.4 AAAAA Southern Plains

HAWAII

O: 2MAY2021 08:01:27 19.3N 155.4W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII

P: 4MAY2021 133448 18.8N 155.2W 3.0-4.4 AAAAA Hawaii

MODERATELY STRONG QUAKE SHAKES COQUIMBO, CHILE

EARTHQUAKE SUMMARY FOR MAY 1, 2021

The strongest earthquake in the world today was an M 5.8 in the region of Coquimbo, Chile. NEIC reported maximum intensity VI in Coquimbo and V in La Serena and Ovalle with light shaking in Valparaiso, Copiapo, Atacama, Lampa, Puente Alto, Santiago, Chile. GUC reported this earthquake was felt with intensity VI in Coquimbo at Vicuna, Combarbalo, V at Andacollo, Coquimbo, Paiguano, IV in Canela, Monte Patria, Ovalle, Punitaqui, Rio Hurtado, Salamanca, III in Illapel; IV in Santiaog at Puente Alto, II in Lo Barnechea; in Valparaiso with II in Quillota, Atacama with IV in Alto del Carmen and Vallenar and III in Caldera, Copiapo, Freirina, HJuasco and Tierra Amarilla, Chile. This is the strongest earthquake within about 200 km of this epicenter in Coquimbo, Chile since an M 5.8 on October 28, 2020 and an M 6.3 on September 6, 2020, the first such events in the region since an M 6.4 on June 14, 2019. A great M 8.3 earthquake hit about 150 km south of today's epicenter on September 16, 2015 doing much regional damage. An M 5.7 hit about 800 km southeast of this in Nuquen Argentina on April 29, 2021 and may have helped promote today's event. Forecasts 133377 and 133688 had expected today's activity in Coquimbo was like in late April or early May. This epicenter is at the seventh node (51-52 degrees) from the M 6.6 in the South Atlantic of April 3, 2021 and was probably promoted by energy from that event.

O: 2MAY2021 06:57 30.1S 71.6W mb=5.8 GUC Coquimbo at Vicuna, Combarbalo

O: 2MAY2021 06:57:36 30.0S 71.5W Mw=5.8 EMSC OFFSHORE COQUIMBO, CHILE

P: 2MAY2021 133688 30.0S 70.0W 4.0-5.6 AAAAA Coast Central Chile

P: 25APR2021 133377 30.0S 70.0W 4.0-5.6 CAAAA Coast Central Chile

The strongest earthquake in the U.S. or Canada today was an M 4.7 in Southeastern Alaska. NEIC reported this earthquake was felt with maximum intensity V in Alaska at Skagway, and II-III in Gustavus, Elfin Cove, Hoonan, Haines, Yakutat, Douglas, Juneau. A foreshock of M 3.6 was felt with intensity III in Douglas, Alaska. This is the strongest earthquake in Southeastern Alaska within about 200 km of this epicenter since an M 5.2 on December 18m 2019 and prior to that an M 5.7 on September 10, 2019. A regional foreshock occurred at this epicenter with M 2.6 following the M 4.8 near Anchorage, Alaska on April 28 suggesting stress buildup in the area. This event had been noted in this summary at the time. Forecasts 133598 and 133318 had expected today's activity was likely within about 25 km of today's epicenter in late April or early May. Activity in the area had been noted on April 26 as:

"A glacial surge has been occurring in southeastern Alaska. It was accompanied today by an M 2.6 Ice quake, one of the strongest in recent history. The surge is happening in Denali Park in Muldrow glacier and on April 12 reached speeds up to 100 feet per day, about 100 times as fast as normal." (April 26, 2021)

This activity is at the fourth node (90 degrees) from the M 8.1 in the Kermadec Islands of March 5, 2021 and was probably promoted by energy from that source. It is also near the seventh node (52 degrees) from the M 6.9 off eastern Honshu, Japan which occurred on May 1 and was probably promoted by energy from that source.

O: 28APR2021 04:44:39 58.5N 136.8W ML=2.6 EMSC SOUTHEASTERN ALASKA

P: 26APR2021 133318 58.0N 139.0W 3.0-4.8 AABAA Southeast Alaska

Today's activity is at 103 degrees from the M 7.3 off the North coast of North Island, New Zealand of March 4, 2021 and at the fourth node (90 degrees) from the Loyalty Islands M 6.6 of February 10, 2021 and was probably promoted by strong energy from those sources. Similar activity at this distance from New Zealand today occurred with an M 3.9 in Nicaragua.

O: 01MAY2021 13:53:03 58.2N 137.9W ML=3.6 EMSC SOUTHEASTERN ALASKA

O: 01MAY2021 15:23:22 58.4N 138.1W mb=4.5 EMSC SOUTHEASTERN ALASKA

O: 01MAY2021 15:23:20 58.3N 137.9W mb=4.7 ANSS SOUTHEASTERN ALASKA

O: 01MAY2021 15:23:26 58.5N 136.8W MB=4.9 ECAN OF SKAGWAY, AK

O: 01MAY2021 15:23:21 58.3N 137.9W MB=4.9 ECAN Yakutat, AK

O: 1MAY2021 16:40:27 58.1N 138.0W ML=3.0 EMSC SOUTHEASTERN ALASKA

P: 26APR2021 133318 58.0N 139.0W 3.0-4.8 BAAAA Southeast Alaska

P: 3MAY2021 133598 58.3N 138.5W 3.0-4.9 AAAAA British Colombia

A moderate earthquake of M 4.3 also occurred off the coast of northern California today. This joins the regional activation which in the past two days has included event of M 5.4 off the coast of Oregon and the M 4.7-4.9 in southeastern Alaska today (see above). Today's event off western California was not reported felt but is somewhat unusual. An event of M 4.3 or greater last occurred within about 75 km of this epicenter on January 27, 2021 with M 4.6 while a series including an M 5.5 occurred in mid May, 2020 and early May 2019 which included an M 4.8. Forecast 133281 had expected today's event was likely around April 30.

O: 2MAY2021 03:30:52 41.1N 127.4W mb=4.3 EMSC OFF COAST OF NORTHERN CALIFORN

P: 30APR2021 133281 41.8N 126.9W 2.5-4.4 AAAAA Off Coast of No. Calif

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

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

INDONESIA AND PHILIPPINES

O: 2MAY2021 06:49:29 0.4N 98.6E ML=4.3 EMSC NIAS REGION, INDONESIA

P: 23APR2021 133112 0.0N 99.0E 4.0-5.5 CAAAA So. Sumatera

P: 29APR2021 133112 2.0N 99.0E 4.0-5.6 BBAAA So. Sumatera

O: 1MAY2021 09:22:00 1.6S 120.2E mb=4.6 EMSC SULAWESI, INDONESIA

P: 27APR2021 133137 1.0S 122.0E 4.0-5.5 BABAA Sulawesi area

O: 1MAY2021 13:12:07 1.7N 127.2E ML=4.3 EMSC HALMAHERA, INDONESIA

P: 1MAY2021 133409 1.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines

O: 1MAY2021 11:41:34 2.6S 128.8E ML=4.3 EMSC CERAM SEA, INDONESIA

P: 1MAY2021 133417 4.0S 128.0E 4.0-5.4 ABAAA Ceram area

P: 27APR2021 133118 4.0S 128.0E 4.0-5.4 BBAAA Ceram area

O: 1MAY2021 15:39:15 3.1S 148.5E mb=4.7 EMSC BISMARCK SEA

P: 1MAY2021 133424 3.0S 149.0E 4.0-5.8 AAAAA New Ireland

P: 27APR2021 133126 5.0S 148.0E 4.0-5.6 BBAAA New Ireland

O: 01MAY2021 13:47:22 6.1N 126.1E ML=4.2 EMSC MINDANAO, PHILIPPINES

O: 1MAY2021 14:26:44 5.0N 125.5E mb=5.1 EMSC MINDANAO, PHILIPPINES

P: 2MAY2021 133410 5.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines

P: 28APR2021 133110 5.0N 125.0E 4.0-5.6 BAAAA Mindanao, Philippines

NEIC reported this earthquake of M 5.1 in Indonesia was felt with intensity II-III in the area(s) of Mindanao, Philippines at San Jose.

O: 1MAY2021 14:34:08 6.4S 130.2E ML=4.0 EMSC BANDA SEA

P: 2MAY2021 133438 6.0S 131.0E 4.0-5.5 AAAAA West Irian, PNG

P: 28APR2021 133142 6.0S 131.0E 4.0-5.6 BAAAA West Irian, PNG

O: 2MAY2021 06:36:04 8.9S 119.2E mb=4.6 EMSC FLORES REGION, INDONESIA

P: 29APR2021 133121 8.0S 121.0E 4.0-5.5 BABAA Flores Island area

O: 2MAY2021 05:45:49 10.2N 126.5E ML=4.0 EMSC PHILIPPINE ISLANDS REGION

P: 4MAY2021 133451 11.0N 126.0E 3.5-4.9 AAAAA Luzon, Philippines

CENTRAL AND SOUTH AMERICA

O: 1MAY2021 09:17:01 11.4N 85.4W ML=3.9 EMSC NICARAGUA

P: 28APR2021 133159 11.0N 86.0W 3.5-5.5 BAAAA Nicaragua

O: 1MAY2021 16:28:43 13.0S 76.6W ML=4.0 EMSC NEAR COAST OF CENTRAL PERU

P: 29APR2021 133340 13.0S 77.0W 4.0-5.5 AAAAA Central Peru

O: 02MAY2021 05:54:19 14.0N 91.8W mb=4.6 EMSC OFFSHORE GUATEMALA

O: 2MAY2021 04:31:33 14.0N 91.8W mb=4.2 EMSC OFFSHORE GUATEMALA

P: 30APR2021 133150 13.0N 91.0W 3.5-5.6 AAAAA Guatemala

O: 1MAY2021 21:57:37 14.5N 93.5W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO

P: 29APR2021 133146 14.0N 93.0W 3.5-5.2 AAAAA Chiapas, Mexico

O: 1MAY2021 08:26:09 16.0N 98.9W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO

P: 1MAY2021 133461 17.0N 98.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 2MAY2021 01:46:51 19.3N 68.9W ML=3.6 EMSC DOMINICAN REPUBLIC REGION

P: 29APR2021 133167 18.0N 68.0W 3.4-5.4 BBAAA Puerto Rico

O: 2MAY2021 06:47:24 19.4N 64.6W Md=4.0 EMSC VIRGIN ISLANDS REGION

P: 30APR2021 133152 19.0N 65.0W 3.0-5.0 AAAAA Leeward Islands

NEIC reported this earthquake of M 4.0 in the Virgin Islands was felt with intensity II-III in the area(s) of Dorado, Puerto Rico.

O: 1MAY2021 17:44:33 28.4N 115.3W ML=3.8 EMSC OFFSHORE BAJA CALIFORNIA, MEXI

P: 26APR2021 133226 30.2N 114.1W 2.0-4.3 BBAAA SW U.S.A

O: 2MAY2021 06:57:36 30.0S 71.5W Mw=5.8 EMSC OFFSHORE COQUIMBO, CHILE

P: 2MAY2021 133688 30.0S 70.0W 4.0-5.6 AAAAA Coast Central Chile

P: 25APR2021 133377 30.0S 70.0W 4.0-5.6 CAAAA Coast Central Chile

AFRICA AND EUROPE

O: 1MAY2021 09:43:21 34.8N 23.3E mb=4.4 EMSC CRETE, GREECE

P: 29APR2021 133190 35.0N 24.0E 3.0-4.7 AAAAA Aegean Sea

O: 2MAY2021 06:24:02 39.2N 0.6W ML=3.4 EMSC SPAIN

P: 4MAY2021 133515 37.0N 3.0W 3.5-5.2 ACBAA Morocco/Spain

O: 1MAY2021 22:10:06 35.4N 3.7W mb=4.3 EMSC STRAIT OF GIBRALTAR

P: 29APR2021 133216 37.0N 3.0W 3.5-5.0 ABAAA Morocco/Spain

NEIC reported this earthquake of M 4.3 in the Strait of Gibraltar was felt with intensity II-III in the area(s) of Al Hocima and Imzouren, Morocco and in Melilla, Spain.

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

SOUTHWEST PACIFIC

O: 1MAY2021 11:50:27 16.2S 167.9E Mw=5.3 EMSC VANUATU

P: 27APR2021 133356 17.0S 168.0E 4.0-5.4 BAAAA Vanuatu Islands

O: 1MAY2021 13:46:52 22.3S 179.8W mb=4.4 EMSC SOUTH OF FIJI ISLANDS

O: 01MAY2021 17:57:09 23.6S 179.7W mb=4.1 EMSC SOUTH OF FIJI ISLANDS

P: 28APR2021 133369 21.0S 179.0W 4.0-5.5 BBAAA Tonga Islands

OCEAN RIDGES

O: 1MAY2021 07:08:51 59.9S 24.2W mb=4.6 EMSC SOUTH SANDWICH ISLANDS REGION

P: 4MAY2021 133712 59.0S 26.0W 4.0-5.9 BAAAA So. Sandwich Islands

P: 30APR2021 133396 61.0S 22.0W 4.0-5.6 ABAAA Southern Ocean

O: 1MAY2021 11:17:59 62.2S 58.5W mb=4.3 EMSC SOUTH SHETLAND ISLANDS

P: 4MAY2021 133714 61.0S 58.0W 4.0-5.8 BBAAA Southern Ocean

P: 23APR2021 133395 62.0S 58.0W 3.0-5.4 CAAAA So. So. America

ZEALANDIA AND AUSTRALIA REGION

O: 02MAY2021 05:35:24 35.5S 179.6E ML=3.8 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 01MAY2021 20:21:04 35.7S 178.9E ML=3.6 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 2MAY2021 06:59:14 36.8S 177.5E ML=3.7 EMSC OFF E. COAST OF N. ISLAND, N.Z

O: 2MAY2021 00:07:07 35.5S 178.6E mb=5.2 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 4MAY2021 133691 37.0S 180.0E 3.5-5.1 ABAAA E. of North Islands N.Z.

O: 1MAY2021 16:42:22 49.8S 164.0E ML=4.5 EMSC AUCKLAND ISLANDS, N.Z. REGION

P: 28APR2021 133389 46.0S 167.0E 3.0-5.0 BCBAA Southern S. Isl. N.Z.

JAPAN AND KURIL ISLANDS

O: 1MAY2021 13:06:30 38.2N 141.7E ML=3.5 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 3MAY2021 133525 38.0N 141.0E 4.0-6.6 AAAAA Off East Coast Honshu

P: 28APR2021 133224 39.0N 142.0E 4.0-5.4 BAAAA Off East Coast Honshu

O: 1MAY2021 15:59:28 45.8N 152.1E mb=4.3 EMSC EAST OF KURIL ISLANDS

P: 28APR2021 133290 45.0N 149.0E 3.5-5.6 BABAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 1MAY2021 16:07:12 35.5N 118.4W Ml=2.2 EMSC CENTRAL CALIFORNIA

P: 3MAY2021 133487 35.3N 118.6W 2.5-2.7 AAAAA So. California

P: 28APR2021 133239 35.7N 118.1W 2.5-5.1 BAAAA So. California

O: 1MAY2021 08:04:26 36.4N 121.0W Md=2.3 EMSC CENTRAL CALIFORNIA

P: 29APR2021 133200 36.4N 121.0W 2.5-4.4 AAAAA Central California

O: 1MAY2021 18:26:24 39.8N 121.8W Ml=3.0 EMSC NORTHERN CALIFORNIA

P: 3MAY2021 133575 40.2N 121.2W 2.5-4.4 AAAAA Northern California

P: 29APR2021 133278 40.0N 120.9W 2.5-4.5 AAAAA Northern California

NEIC reported this earthquake of M 3.0 in Northern California was felt with intensity II-III in the area(s) of Northern California at Chico, Yuba City, Arbuckle and Lincoln.

O: 2MAY2021 06:30:07 40.7N 124.7W Md=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 30APR2021 133279 40.2N 124.2W 2.5-4.4 AAAAA Off Coast of No. Calif

O: 2MAY2021 03:30:52 41.1N 127.4W mb=4.3 EMSC OFF COAST OF NORTHERN CALIFORN

P: 30APR2021 133281 41.8N 126.9W 2.5-4.4 AAAAA Off Coast of No. Calif

ALASKA

O: 01MAY2021 13:53:03 58.2N 137.9W ML=3.6 EMSC SOUTHEASTERN ALASKA

O: 01MAY2021 15:23:22 58.4N 138.1W mb=4.5 EMSC SOUTHEASTERN ALASKA

O: 01MAY2021 15:23:26 58.5N 136.8W MB=4.9 ECAN OF SKAGWAY, AK

O: 01MAY2021 15:23:21 58.3N 137.9W MB=4.9 ECAN Yakutat, AK

O: 1MAY2021 16:40:27 58.1N 138.0W ML=3.0 EMSC SOUTHEASTERN ALASKA

P: 3MAY2021 133598 58.3N 138.5W 3.0-4.9 AAAAA British Colombia

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

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

ROCKY MOUNTAINS REGION

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

EASTERN U.S./CANADA

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

HAWAII

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

STRONG QUAKE SHAKES EASTERN HONSHU, JAPAN

EARTHQUAKE SUMMARY FOR APRIL 30, 2021

The strongest earthquake in the world today was an M 6.8 off the northern coast of Eastern Honshu, Japan. NEIC reported intensity VII in Japan in Miyagi, Prefecture in Yamoto, Tagajo, Kogota, and VI in Natori, Sendai, Kesennauma and Ishinomaki and V in Shiogama, Rifu and Iwanuma. JMA reported this earthquake with M 6.6 and noted intensity 5+ in Miyagi with intensity up to 4 throughout most of western Honshu. It was preceded by an M 4.5 to the northwest which was felt with intensity II-III in Tomisato, Oamishirasato, Chiba and in Kanagawa, Japan. No tsunami was expected with this earthquake nor were significant tsunami waves observed. Trains and some company operations were suspended following the quake but operations returned after checks revealed no major damage. While some light injuries were reported no major casualties occurred. The mainshock occurred near local solar noon and was probably promoted by strong tidal stresses related to the Full Moon of April 27 as noted in previous issues of this summary:

Today's event follows similar earthquakes off eastern Honshu of M 7.0 on March 20, 2021 and M 7.1 on February 13, 2021 - an event closely linked to the new moon of February 11, 2021. The last such earthquake of M>=6.8 off the coast of eastern Honshu occurred as an M 6.9 on November 32, 2016. These all appear to be aftershocks of the great M 9.3 of March 11, 2011. Far-field seismicity may be promoted by this event as noted following previous large earthquakes in this area:

"Far-field triggering is possible from the M 7.1 in Japan today. Areas at 144 degrees include the South Shetland Islands, northern Chile and southern Peru; near 103 degrees in central and western Mexico, the Madeira Islands, southern Spain, Madagascar, Mayotte, at 120 degrees (node 3) at Panama and Costa Rica and Puerto Rico; at 90 degrees (node 4) at Oklahoma and Texas, South Island, New Zealand; at 72 degrees (node 5) in Central and northern California, Iceland, Croatia, eastern Europe and Turkey, Fiji, Tonga, Loyalty Islands; in western Indonesia at 60 degrees (node 6); in Tajikistan, Indonesia, Philippines at node 7 (51 degrees) and in New Britain, Xizang, Alaska Peninsula at node 8 (45 degrees)." (February 14, 2021)

Forecast 133224 had expected this activity in Japan was likely within about 100 km around April 28.

O: 01MAY2021 03:01:30 38.3N 141.9E ML=3.6 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 01MAY2021 06:58:30 38.2N 141.7E ML=3.8 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 1MAY2021 01:27:28 38.2N 141.7E Mw=6.8 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 28APR2021 133224 39.0N 142.0E 4.0-5.4 BAAAA Off East Coast Honshu

O: 1MAY2021 00:10:06 39.4N 140.6E mb=4.5 EMSC EASTERN HONSHU, JAPAN

P: 28APR2021 133224 39.0N 142.0E 4.0-5.4 BABAA Off East Coast Honshu

The strongest earthquake in the U.S. or Canada today was an M 4.3 in the area of Central Alaska. NEIC reported this earthquake of M 4.3 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Fairbanks. This is the strongest earthquake within about 200 km of this epicenter since an M 4.3 on August 4, 2020. The last event of larger magnitude in this area was an M 4.6 on September 6, 2019. Forecast 133326 had expected today's event in Central Alaska was likely around April 28.

O: 30APR2021 17:19:24 64.8N 152.4W mb=4.3 EMSC CENTRAL ALASKA

P: 28APR2021 133326 62.8N 151.2W 3.2-5.1 ABAAA Central Alaska

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 30APR2021 20:47:32 19.3N 97.1E mb=4.5 EMSC MYANMAR

P: 28APR2021 133180 23.0N 94.0E 4.0-5.4 ACCAA Myanmar

NEIC reported this earthquake of M 4.4 in Myanmar was felt with intensity II-III in the area(s) of Myanmar at Pyinmana, Mandalay.

O: 30APR2021 14:21:06 37.8N 69.3E mb=4.1 EMSC TAJIKISTAN

O: 1MAY2021 02:52:42 39.2N 72.6E mb=4.2 EMSC TAJIKISTAN

P: 24APR2021 133210 39.0N 71.0E 3.8-5.2 CAAAA Hindu Kush/Pakistan

P: 27APR2021 133210 38.0N 74.0E 3.8-5.6 BBAAA Hindu Kush/Pakistan

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

INDONESIA AND PHILIPPINES

O: 1MAY2021 01:47:28 1.4N 96.9E ML=4.3 EMSC NIAS REGION, INDONESIA

P: 27APR2021 133111 2.0N 95.0E 4.0-5.8 BABAA Nicobar Islands

P: 29APR2021 133112 2.0N 99.0E 4.0-5.6 AABAA So. Sumatera

O: 30APR2021 22:34:30 1.6S 120.2E ML=4.8 EMSC SULAWESI, INDONESIA

O: 30APR2021 19:50:46 1.6S 120.1E ML=4.5 EMSC SULAWESI, INDONESIA

P: 24APR2021 133137 1.0S 120.0E 4.0-5.4 CAAAA Sulawesi area

O: 1MAY2021 00:21:58 2.6S 128.9E ML=4.5 EMSC CERAM SEA, INDONESIA

P: 27APR2021 133118 4.0S 128.0E 4.0-5.4 BBAAA Ceram area

O: 30APR2021 16:30:59 4.2S 135.8E ML=4.0 EMSC NEAR S COAST OF PAPUA, INDONES

P: 27APR2021 133140 3.0S 134.0E 4.0-5.6 BBBAA West Irian, PNG

O: 30APR2021 17:42:14 5.1N 127.3E ML=4.1 EMSC PHILIPPINE ISLANDS REGION

P: 27APR2021 133110 6.0N 126.0E 4.0-5.4 BABAA Mindanao, Philippines

O: 30APR2021 16:43:27 5.4N 94.3E mb=5.0 EMSC NORTHERN SUMATRA, INDONESIA

P: 27APR2021 133111 2.0N 95.0E 4.0-5.8 BCAAA Nicobar Islands

NEIC reported this earthquake of M 5.1 in northern Sumatra, Indonesia was felt with intensity II-III in the area(s) of northern Sumatra, Indonesia at Banda Aceh.

O: 30APR2021 20:25:23 7.5S 128.7E mb=4.4 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 28APR2021 133114 7.0S 129.0E 4.0-5.5 AAAAA Banda Sea

O: 1MAY2021 03:23:20 15.6N 145.3E mb=4.3 EMSC SAIPAN REG., N. MARIANA ISLAND

P: 30APR2021 133168 14.0N 145.0E 4.0-5.4 ABAAA So. Marianas/Guam

CENTRAL AND SOUTH AMERICA

O: 1MAY2021 06:13:40 9.7N 79.1W Mw=5.1 EMSC PANAMA

P: 27APR2021 133102 7.0N 78.0W 4.0-5.6 BCAAA Colombia

P: 29APR2021 133145 10.0N 84.0W 3.5-5.2 AACAA Caribbean Sea

NEIC reported this earthquake of M 5.1 in Panama was felt with intensity II-III in the area(s) of Panama with VI in Cabra; IV in Los Lotes, Cerro Azul, Tecumen, Alcaisw, Las Cumbres, San Miguelito and Panama City and III in Chilibre, and Tubuala Kuna.

O: 1MAY2021 06:36:35 11.9N 73.9W mb=4.5 EMSC NEAR NORTH COAST OF COLOMBIA

P: 23APR2021 133162 12.0N 71.0W 3.5-5.1 CABAA Northern Venezuela

P: 26APR2021 133162 10.0N 71.0W 3.5-5.1 BBBAA Northern Venezuela

NEIC reported this earthquake of M 4.5 off Northern Colombia was felt with intensity II-III in the area(s) of Northern Columbia at Santa Maria and Barranquilla.

O: 1MAY2021 06:26:23 16.0N 98.9W ML=4.2 EMSC OFFSHORE GUERRERO, MEXICO

P: 23APR2021 133165 17.0N 98.0W 3.5-5.1 CAAAA Oaxaca, Mexico

O: 30APR2021 09:09:41 17.3S 69.7W mb=4.1 EMSC SOUTHERN PERU

O: 30APR2021 13:02:30 16.7S 72.8W ML=4.0 EMSC NEAR COAST OF SOUTHERN PERU

O: 30APR2021 10:02:36 17.3S 69.8W mb=4.4 EMSC SOUTHERN PERU

P: 28APR2021 133349 16.0S 72.0W 4.0-5.6 AAAAA So. Peru/Bolivia

O: 30APR2021 07:39:27 17.5N 94.9W ML=4.1 EMSC VERACRUZ, MEXICO

P: 29APR2021 133164 17.0N 96.0W 3.5-5.1 AAAAA Oaxaca, Mexico

O: 30APR2021 15:04:35 28.0N 112.2W ML=3.8 EMSC GULF OF CALIFORNIA

P: 30APR2021 133175 28.0N 112.0W 3.5-5.0 AAAAA Gulf of California

O: 30APR2021 20:06:36 29.0S 71.7W Mw=4.6 EMSC OFFSHORE ATACAMA, CHILE

P: 27APR2021 133359 28.0S 71.0W 4.0-5.6 BAAAA Coast Central Chile

O: 1MAY2021 02:21:38 19.1N 66.8W Md=3.0 EMSC PUERTO RICO REGION

P: 30APR2021 133152 19.0N 65.0W 3.0-5.0 AABAA Leeward Islands

AFRICA AND EUROPE

O: 30APR2021 20:04:52 71.5N 4.3W mb=4.1 EMSC JAN MAYEN ISLAND REGION

P: 29APR2021 133334 71.0N 8.0W 3.5-5.1 AAAAA Jan Mayen Isl. area

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

SOUTHWEST PACIFIC

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

OCEAN RIDGES

O: 30APR2021 21:49:38 40.8S 78.5E mb=5.1 EMSC MID-INDIAN RIDGE

P: 30APR2021 133382 37.0S 79.0E 4.0-5.5 ACAAA So. Indian Ocean

O: 30APR2021 21:35:31 48.9S 31.1E mb=4.8 EMSC SOUTH OF AFRICA

P: 29APR2021 133392 51.0S 29.0E 4.0-5.4 ABBAA Atlantic-Indian Ridge

ZEALANDIA AND AUSTRALIA REGION

O: 30APR2021 09:50:44 37.2S 178.5E ML=3.7 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 25APR2021 133380 37.0S 178.0E 3.0-4.5 BAAAA North Island, N.Z.

JAPAN AND KURIL ISLANDS

O: 30APR2021 17:45:41 33.8N 136.4E mb=4.3 EMSC NEAR S. COAST OF WESTERN HONSH

P: 26APR2021 133219 35.0N 137.0E 3.5-5.1 BBAAA No. Honshu, Japan

O: 01MAY2021 03:01:30 38.3N 141.9E ML=3.6 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 01MAY2021 06:58:30 38.2N 141.7E ML=3.8 EMSC NEAR EAST COAST OF HONSHU, JAPAN

O: 1MAY2021 01:27:28 38.2N 141.7E Mw=6.8 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 28APR2021 133224 39.0N 142.0E 4.0-5.4 BAAAA Off East Coast Honshu

O: 1MAY2021 00:10:06 39.4N 140.6E mb=4.5 EMSC EASTERN HONSHU, JAPAN

P: 28APR2021 133224 39.0N 142.0E 4.0-5.4 BABAA Off East Coast Honshu

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 30APR2021 10:56:27 32.5N 115.6W Ml=2.4 EMSC BAJA CALIFORNIA, MEXICO

P: 29APR2021 133231 32.4N 115.8W 2.5-4.5 AAAAA So. California

O: 30APR2021 17:48:28 33.5N 116.7W Ml=2.2 EMSC SOUTHERN CALIFORNIA

P: 25APR2021 133232 33.4N 116.7W 2.5-4.5 BAAAA So. California

O: 30APR2021 21:35:43 34.0N 117.0W ML=2.5 EMSC GREATER LOS ANGELES AREA, CALI

P: 28APR2021 133233 33.7N 117.5W 2.5-4.6 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 at Yucaipa, Redlands, Highland, San Bernardino, Riverside, Perris, and Hesperia.

O: 30APR2021 09:46:28 36.9N 121.4W Md=2.1 EMSC CENTRAL CALIFORNIA

O: 30APR2021 23:41:32 36.2N 120.8W Md=2.1 EMSC CENTRAL CALIFORNIA

O: 30APR2021 23:53:56 36.6N 121.2W Md=2.5 EMSC CENTRAL CALIFORNIA

P: 29APR2021 133200 36.4N 121.0W 2.5-4.4 AAAAA Central California

O: 30APR2021 11:59:44 38.1N 118.4W ml=2.4 EMSC NEVADA

O: 30APR2021 12:11:26 38.2N 117.8W ml=2.0 EMSC NEVADA

P: 25APR2021 133195 38.0N 118.0W 2.5-4.7 BAAAA California/Nevada area

O: 30APR2021 14:59:35 38.8N 122.8W Md=2.8 EMSC NORTHERN CALIFORNIA

P: 29APR2021 133202 38.7N 122.7W 2.5-4.5 AAAAA Central California

NEIC reported this earthquake of M 2.8 in the Geysers, California was felt with intensity II-III in the area(s) of the Geysers, California at Kelseyville.

O: 30APR2021 20:10:52 39.4N 118.1W ml=2.3 EMSC NEVADA

P: 29APR2021 133258 40.0N 117.9W 2.5-4.6 AAAAA California/Nevada area

O: 30APR2021 06:59:36 39.4N 120.2W ml=2.2 EMSC NORTHERN CALIFORNIA

P: 26APR2021 133203 39.4N 120.5W 2.5-4.6 BAAAA Central California

ALASKA

O: 30APR2021 15:15:34 52.2N 176.2W mb=3.9 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 27APR2021 133304 51.7N 175.3W 3.5-5.2 BAAAA Andreanoff Isls, Aleutians

O: 30APR2021 13:01:16 55.4N 161.8W ML=3.0 EMSC ALASKA PENINSULA

O: 30APR2021 19:47:18 54.3N 161.6W mb=3.4 EMSC ALASKA PENINSULA

P: 26APR2021 133319 54.1N 162.8W 3.5-5.1 BAAAA Unimak Islands, Aleutians

O: 30APR2021 17:19:24 64.8N 152.4W mb=4.3 EMSC CENTRAL ALASKA

P: 28APR2021 133326 62.8N 151.2W 3.2-5.1 ABAAA 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: 30APR2021 10:15:31 32.1N 102.1W mb=3.0 EMSC WESTERN TEXAS

P: 26APR2021 133227 32.6N 103.6W 2.0-3.9 BABAA SW U.S.A

NEIC reported this earthquake of M 3.2 in Western Texas was felt with intensity II-III in the area(s) of Western Texas with IV in Midland, and lesser shaking in Stanton, Austin, Seabrook.

O: 30APR2021 13:20:01 44.3N 115.3W ML=2.6 EMSC SOUTHERN IDAHO

O: 30APR2021 13:38:40 44.3N 115.2W Ml=2.3 EMSC SOUTHERN IDAHO

O: 30APR2021 12:06:16 44.3N 115.2W Ml=2.3 EMSC SOUTHERN IDAHO

P: 28APR2021 133269 44.4N 115.2W 2.0-4.1 AAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 30APR2021 19:58:59 34.4N 97.5W ML=2.1 EMSC OKLAHOMA

P: 28APR2021 133245 34.0N 96.0W 2.0-4.3 AAAAA Southern Plains

O: 30APR2021 13:16:32 36.9N 98.7W ML=2.0 EMSC OKLAHOMA

P: 30APR2021 133246 36.0N 97.0W 2.0-4.4 AABAA Southern Plains

O: 30APR2021 12:50:03 39.6N 98.4W mb=2.3 EMSC KANSAS

P: 26APR2021 133247 39.0N 99.0W 2.0-4.3 BAAAA Southern Plains

O: 30APR2021 13:35:08 48.5N 58.8W MB=2.2 ECAN Stephenville, NL

O: 30APR2021 09:07:34 47.0N 71.0W MB=1.8 ECAN Beaupre, QC

P: 26APR2021 133274 47.3N 70.5W 2.0-3.9 BAAAA New England

O: 29APR2021 18:34:21 46.0N 64.9W MB=2.4 ECAN Salisbury, NB

P: 22APR2021 133261 46.0N 66.0W 2.0-3.9 CAAAA E. of Maine

O: 29APR2021 11:39:27 49.0N 67.6W MB=2.7 ECAN Matane, QC

P: 28APR2021 133261 49.0N 66.0W 2.0-3.9 AAAAA E. of Maine

HAWAII

O: 01MAY2021 05:30:25 19.3N 155.4W ML=2.9 EMSC ISLAND OF HAWAII, HAWAII

O: 30APR2021 15:33:47 19.2N 155.6W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII

P: 28APR2021 133176 20.1N 156.1W 4.0-5.8 AAAAA Hawaii area

NEIC reported this earthquake of M 3.2 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Naalehu. A foreshock of M 3.0 was also felt in Captain Cook and Volcano, Hawaii.

MODERATE QUAKES OFF COAST OF OREGON RELATED TO FULL MOON

EARTHQUAKE SUMMARY FOR APRIL 29, 2021

The enhanced seismicity off the coast of Oregon of the past several days maximized today with an M 5.4 and M 5.2 in the region today. These events were felt with maximum intensity VI in Oregon at Gold Beach, and II-III in Bandon, Brookings, Portland, Seaside and Salem and in California at Fortuna and Burnt Ranch. In recent history the largest earthquakes in this area have occurred with the full moon alignment and were probably tidally promoted. In the previous issue of this summary it had been noted in this regard:

"The strongest earthquake in the U.S. or Canada today was an M 4.4 off the coast of Oregon. This is the strongest earthquake within about 150 km of this epicenter since an M 5.1 and an M 4.9 on February 20, 2021. A moderate quake of M 5.7 on December 29, 2020 was the only other such earthquake in the area in the past year. Forecast 133282 had expected today's event was likely around April 29." (April 28-29, 2021)

Prior to the M 5.7 of December 29, 2020, the area had not seen an event of M>=5.4 since and M 5.9 on September 5, 2019, an aftershock of an M 6.3 on August 29, 2019.

Similar to today's event, the earthquake of December 29, 2020 occurred with the full moon of December 30, as noted in this summary at the time:

"The strongest earthquake in the U.S. or Canada today was an M 5.7 off the Coast of Oregon. NEIC reported it was felt lightly along the coast in Bandon, Langlois, Port Orford, Coquille, Coos Bay, Gold Beach, Lakeside, North Bend, Florence, and Newport, Oregon. This event occurred near local solar midnight and may have been promoted by tidal triggering associated with the full moon on December 30 " (December 30, 2020)

and

"The third promoter of today's event off Oregon was probably high astronomical tides associated with the new moon." (August 30, 2019)

Previous events in the region including an M 6.2 on August 22, 2018; July 17, 2019 (M 5.4); August 16, 2019 (M 5.4). These events were also noted at the time to have been closely associated with the full moon as noted at the time in this summary:

"The strongest earthquake in the U.S. or Canada today was an M 5.4 off the coast of Oregon. NEIC reported it may have been felt lightly in Oregon at Eugene and Medford and in Seattle, Washington. A foreshock to the southeast of the M 5.4 occurred earlier in the day near local solar midnight and may have been promoted by strong tidal stresses associated with the full moon. The last event with M>=3.9 near the foreshock occurred a month ago on July 17, 2019 and prior to that as an M 4.1 on June 26, 2019. Both the event in June and July (2019) occurred with the full moon as noted at the time" (August 17, 2019)

Today's events of M 5.3, 5.4 and 5.2 occurred within about 25-50 km of the epicenter expected in forecast 133282 which expected this activity was likely around April 29. This activity is at 142 degrees from the M 6.6 in the South Atlantic of April 3, 2021, the last strong global earthquake and at the fourth node (90 degrees) from the M 7.3 in the region of North Island, New Zealand of March 4, 2021 and may have been promoted by energy from those sources. Similar events at the fourth node from New Zealand occurred today in Guerrero, Mexico (M 5.0) and in California and the Gulf of California among others.

O: 29APR2021 13:24:55 43.8N 128.2W mb=4.1 EMSC OFF COAST OF OREGON

O: 29APR2021 13:33:00 43.8N 128.4W mb=3.9 EMSC OFF COAST OF OREGON

O: 29APR2021 10:30:21 43.9N 128.5W Mw=5.4 EMSC OFF COAST OF OREGON

O: 29APR2021 10:35:45 43.9N 128.5W Mw=5.2 EMSC OFF COAST OF OREGON

O: 29APR2021 10:58:35 43.9N 128.1W Mw=5.3 EMSC OFF COAST OF OREGON

O: 29APR2021 10:25:16 44.0N 128.0W mb=4.3 EMSC OFF COAST OF OREGON

O: 29APR2021 13:24:55 43.8N 128.2W mb=4.1 EMSC OFF COAST OF OREGON

P: 29APR2021 133282 44.1N 128.8W 3.0-4.7 AAAAA Off Coast of Oregon

The strongest seismicity in the world today continued to occur in the aftershock

zone of the Northern Kermadec Islands following the mainshock in that area of March 4, 2021. None of these events including an M 5.9 and two of M 5.5 were reported felt in this remote area. This continues elevated seismicity in this region as discussed in the previous issue of this summary:

"The strongest earthquake in the world that was not felt today was an M 5.9 in the continuing aftershock sequence in the northern Kermadec Islands, New Zealand. This followed an M 5.4 off northern North Island, New Zealand. The last earthquake in this aftershock zone in northern Kermadec Islands with M>=5.9 occurred on April 27, 2021 also with M 5.9. Earthquakes of M 6.0 on April 7 and M 6.5 on April 1 complete the list of similar earthquakes since the immediate aftershocks of the M 8.1 on March 4. Forecasts 133362 had expected today's activity in the aftershock zone within about 50 km of this epicenter around April 26-30." (April 28-29, 2021)

O: 29APR2021 13:55:31 29.2S 176.5W mb=5.0 EMSC KERMADEC ISLANDS REGION

O: 29APR2021 06:50:30 29.4S 176.7W Mw=5.9 EMSC KERMADEC ISLANDS REGION

O: 29APR2021 07:06:37 29.5S 176.6W mb=5.0 EMSC KERMADEC ISLANDS REGION

O: 29APR2021 13:54:12 29.5S 176.5W mb=4.9 EMSC KERMADEC ISLANDS REGION

O: 29APR2021 12:25:27 29.7S 176.8W mb=5.1 EMSC KERMADEC ISLANDS REGION

O: 29APR2021 09:19:33 29.8S 177.7W mb=4.6 EMSC KERMADEC ISLANDS, NEW ZEALAND

O: 30APR2021 02:06:15 29.8S 177.6W mb=5.5 EMSC KERMADEC ISLANDS, NEW ZEALAND

O: 29APR2021 07:44:57 29.9S 177.7W mb=4.8 EMSC KERMADEC ISLANDS, NEW ZEALAND

O: 29APR2021 21:39:04 30.6S 177.6W mb=5.0 EMSC KERMADEC ISLANDS, NEW ZEALAND

O: 29APR2021 06:53:53 29.2S 176.9W mb=5.5 EMSC KERMADEC ISLANDS REGION

P: 26APR2021 133362 29.0S 177.0W 4.0-5.7 BAAAA No. Kermadec Islands

P: 30APR2021 133362 28.0S 176.0W 4.0-5.8 ABAAA No. Kermadec Islands

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 29APR2021 17:40:36 21.6N 121.6E ML=3.7 EMSC TAIWAN REGION

O: 29APR2021 14:35:40 21.8N 121.8E mb=4.5 EMSC TAIWAN REGION

O: 29APR2021 14:32:59 21.9N 121.7E mb=4.7 EMSC TAIWAN REGION

O: 29APR2021 14:35:41 21.9N 121.6E ML=4.8 TAI Hualien, Taiwan

O: 29APR2021 14:32:59 21.8N 121.7E ML=4.6 TAI Hualien, Taiwan

P: 28APR2021 133186 22.0N 122.0E 4.0-5.5 AAAAA Taiwan

CWB reported the M 4.6 and M 4.8 were both felt with intensity IV in Taitung and I in Pingtung Counties, Taiwan.

O: 29APR2021 20:06:03 36.6N 71.1E mb=4.7 EMSC HINDU KUSH REGION, AFGHANISTAN

P: 25APR2021 133209 36.0N 72.0E 3.8-5.3 BAAAA Hindu Kush/Pakistan

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

INDONESIA AND PHILIPPINES

O: 29APR2021 13:50:34 1.6S 134.4E ML=4.5 EMSC NEAR N COAST OF PAPUA, INDONES

O: 29APR2021 07:26:34 1.8S 134.3E mb=4.7 EMSC NEAR N COAST OF PAPUA, INDONESIA

P: 27APR2021 133140 3.0S 134.0E 4.0-5.6 ABAAA West Irian, PNG

O: 29APR2021 14:39:33 3.3N 120.9E ML=4.0 EMSC CELEBES SEA

P: 26APR2021 133098 1.0N 122.0E 4.0-5.4 BCAAA Celebes Sea

O: 29APR2021 15:42:28 5.3S 146.3E mb=4.3 EMSC EASTERN NEW GUINEA REG., P.N.G

O: 30APR2021 05:45:54 5.6S 146.4E mb=4.4 EMSC EASTERN NEW GUINEA REG., P.N.G.

P: 27APR2021 133126 5.0S 146.0E 4.0-5.4 AAAAA New Ireland

O: 29APR2021 22:20:17 9.1S 114.0E mb=4.6 EMSC SOUTH OF BALI, INDONESIA

P: 30APR2021 133131 9.0S 114.0E 4.0-5.6 AAAAA So. of Bali

NEIC reported this earthquake of M 4.6 in Bali was felt with intensity II-III in the area(s) of Bali at Kuta, Denpasar and Ubud.

CENTRAL AND SOUTH AMERICA

O: 29APR2021 08:22:19 17.0N 94.7W ML=4.2 EMSC OAXACA, MEXICO

O: 29APR2021 20:21:40 16.5N 95.2W ML=4.2 EMSC OAXACA, MEXICO

P: 28APR2021 133147 16.0N 95.0W 3.5-5.2 AAAAA Chiapas, Mexico

O: 29APR2021 11:02:25 17.3N 101.5W mb=5.1 EMSC OFFSHORE GUERRERO, MEXICO

P: 30APR2021 133156 17.0N 102.0W 3.5-5.5 AAAAA Michoacan, Mexico

NEIC reported this earthquake of M 5.0 in Guerrero, Mexico was felt with intensity II-III in the area(s) of Guerrero, Mexico in Ixtapa and Zihuatanejo.

O: 29APR2021 15:34:44 19.2N 67.2W Md=3.3 EMSC PUERTO RICO REGION

P: 25APR2021 133172 20.0N 68.0W 3.0-4.7 BAAAA Bahamas/No. Caribbean

O: 29APR2021 16:00:39 23.3S 68.7W Mw=4.7 EMSC ANTOFAGASTA, CHILE

O: 30APR2021 05:04:23 22.8S 66.2W mb=4.7 EMSC JUJUY, ARGENTINA

P: 25APR2021 133357 21.0S 67.0W 4.0-5.9 BBAAA Argentina

O: 29APR2021 20:52:49 27.3N 111.3W ML=3.6 EMSC GULF OF CALIFORNIA

P: 30APR2021 133175 28.0N 112.0W 3.5-5.0 AAAAA Gulf of California

AFRICA AND EUROPE

O: 29APR2021 11:37:37 64.1N 21.4W ML=3.5 EMSC ICELAND

P: 25APR2021 133328 66.0N 18.0W 3.0-4.7 BBBAA Iceland area

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

SOUTHWEST PACIFIC

O: 30APR2021 05:18:31 11.9S 166.3E mb=5.1 EMSC SANTA CRUZ ISLANDS

P: 26APR2021 133355 12.0S 166.0E 4.0-5.7 BAAAA Vanuatu Islands

O: 29APR2021 10:01:11 20.7S 173.9W mb=5.0 EMSC TONGA

P: 29APR2021 133369 20.0S 176.0W 4.0-5.8 AABAA Tonga Islands