Previous two summaries

STRONG EARTHQUAKE IN NEW GUINEA PROMOTED BY TIDAL STRESSES

EARTHQUAKE SUMMARY FOR APRIL 10, 2021

The strongest earthquake in the world today was an M 6.0-6.1 off the north coast of New Guinea. NEIC reported it was felt in Papua New Guinea with intensity II-III at Madang and Mount Hagen. It was probably promoted by high tidal stresses associated with the New Moon of April 12 as noted in previous issues of this report maximize near this longitude:

"The new moon will arrive on April 12 at 02:31 UT. Longitudes which are near local solar midnight at this time are near 37 West and those at local solar noon are near 143 East longitude. In the west these include area of the Atlantic Ocean and in the east much of the western Pacific subduction zone maximizing in Honshu, Japan and the Kuril Islands and in New Guinea, Indonesia. These are the most likely areas to see tidal triggering of seismicity with this new moon. A strong to major quake is possible in the next week to 10 days with this new moon, possibly near these longitudes." (April 8-9, 2021)

This epicenter is near the geomagnetic equator and like similar events in the Celebes Sea and in Java today may have been prompted by the now-concluded strong geomagnetic storm previously identified in this summary as:

"The geomagnetic field saw active today. The AP level was 17. High latitude geomagnetic field saw stormy conditions with AP 35. Strong geomagnetic storms such as this can promote enhanced seismicity in the high latitudes and near the geomagnetic equator and this is likely in the next three days." (April 7-8, 2021)

The only events within about 200 km of today's epicenter within the past three years occurred as an M 6.3 on February 7, 2021 and an M 6.2 on January 17, 2019.

Forecast 132591 had expected today's event in New Guinea was likely around April 7.

O: 10APR2021 11:38:32 3.5S 145.7E Mw=6.0 EMSC NEAR N COAST OF NEW GUINEA, PN

P: 7APR2021 132591 7.0S 144.0E 4.0-5.4 BCBAA Papua New Guinea

A similar M 6.1 occurred several hours earlier in the area of the Celebes Sea south of the Philippines. NEIC reported this earthquake was felt with intensity III in Buayan, Southern Mindanao, Philippines. This is the strongest earthquake in the Celebes Sea region in at least a year. The last within about 200 km of this epicenter with M>=6.1 was an M 6.1 on December 15, 2020 but the last with larger magnitude in this area was an M 6.5 to the west on February 10, 2011. An M 7.3 occurred about 200 km northwest of today's epicenter on January 10, 2017. Forecast 132574 had expected today's activity to the south was likely around April 9.

O: 10APR2021 09:30:44 4.2N 124.6E Mw=6.1 EMSC CELEBES SEA

P: 9APR2021 132574 1.0N 124.0E 4.0-5.6 ACAAA Mindanao, Philippines

These events followed an M 6.0 felt widely in Java and noted in the previous issue of this summary as:

"The earthquake south of Java, Indonesia of M 6.0 is the strongest within about 200 km of that epicenter since an M 6.0 on July 25, 2015. The last such event with greater magnitude was an M 6.6 on September 28, 1998. Forecast 132592 had expected today's event in this region around April 7." (April 10, 2021)

NEIC reported today's earthquake of M 5.1 in Java, Indonesia was felt with intensity II-III in the area(s) of Java, Indonesia at Blitar and Malang.

O: 10APR2021 12:49:20 8.9S 112.5E ML=4.2 EMSC JAVA, INDONESIA

O: 10APR2021 07:00:17 8.4S 112.6E mb=6.0 EMSC JAVA, INDONESIA

O: 10APR2021 23:54:58 8.4S 112.5E mb=5.1 EMSC JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 BACAA So. of Java

A moderately strong earthquake of M 5.5 also shook the South Shetland Islands today. It was not reported felt. It is located near the line of maximum longitude in the western hemisphere with the new moon and was probably promoted by strong tidal stresses associated with that alignment. An M 7.1 hit this area on January 23, 2021 and the strongest aftershock to date has been an M 5.5 on January 24, 2021. Forecast 132834 had expected today's event within about 150

km was likely around April 5.

O: 10APR2021 07:14:02 62.3S 58.3W Mw=5.5 EMSC SOUTH SHETLAND ISLANDS

P: 5APR2021 132834 61.0S 58.0W 3.0-5.6 BAAAA So. So. America

An unusual earthquake of M 5.0 in the South Pacific Ocean today may also have been related to high tidal stresses. This event is the strongest within about 500 km in at least 30 years. The only recorded event with M>=4 in the general region in this time was an M 4.7 on November 14, 1997 about 550 km northwest of today's epicenter.

O: 10APR2021 17:55:40 40.1S 124.5W mb=5.0 EMSC SOUTH PACIFIC OCEAN

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: 10APR2021 15:18:24 28.5N 66.5E mb=4.5 EMSC PAKISTAN

O: 10APR2021 21:49:37 28.3N 67.3E mb=4.2 EMSC PAKISTAN

P: 7APR2021 132640 29.0N 68.0E 3.5-4.9 BAAAA Pakistan

O: 10APR2021 18:21:47 31.7N 90.7E mb=4.7 EMSC EASTERN XIZANG

P: 10APR2021 132708 30.0N 90.0E 3.8-5.5 ABAAA Xizang

O: 10APR2021 17:56:23 42.6N 79.3E mb=4.0 EMSC KYRGYZSTAN

P: 5APR2021 132719 42.0N 82.0E 4.0-5.4 BABAA Kirgizstan/Xinjiang

INDONESIA AND PHILIPPINES

O: 11APR2021 06:52:51 0.4N 97.7E ML=4.0 EMSC NIAS REGION, INDONESIA

P: 9APR2021 132577 0.0N 99.0E 4.0-5.4 AABAA So. Sumatera

O: 10APR2021 11:38:32 3.5S 145.7E Mw=6.0 EMSC NEAR N COAST OF NEW GUINEA, PN

P: 7APR2021 132591 7.0S 144.0E 4.0-5.4 BCBAA Papua New Guinea

O: 10APR2021 09:30:44 4.2N 124.6E Mw=6.1 EMSC CELEBES SEA

P: 9APR2021 132574 1.0N 124.0E 4.0-5.6 ACAAA Mindanao, Philippines

O: 10APR2021 07:15:13 5.4S 103.3E ML=4.0 EMSC SOUTHERN SUMATRA, INDONESIA

P: 7APR2021 132593 6.0S 103.0E 4.0-5.6 BAAAA So. of Sumatera

O: 11APR2021 01:21:06 5.7S 153.2E mb=4.9 EMSC NEW IRELAND REGION, P.N.G.

P: 6APR2021 132587 5.0S 153.0E 4.0-5.5 BAAAA New Britain

P: 9APR2021 132594 6.0S 155.0E 4.0-5.4 AABAA Solomon Islands

O: 10APR2021 16:00:20 7.3S 122.3E mb=4.8 EMSC FLORES SEA

P: 7APR2021 132584 7.0S 123.0E 4.0-5.5 BAAAA Flores Island area

O: 10APR2021 12:49:20 8.9S 112.5E ML=4.2 EMSC JAVA, INDONESIA

O: 10APR2021 07:00:17 8.4S 112.6E mb=6.0 EMSC JAVA, INDONESIA

O: 10APR2021 23:54:58 8.4S 112.5E mb=5.1 EMSC JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 BACAA So. of Java

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 BABAA So. of Java

O: 10APR2021 12:27:02 3.8S 145.5E ML=4.6 EMSC NEAR N COAST OF NEW GUINEA, PNG.

CENTRAL AND SOUTH AMERICA

O: 10APR2021 10:04 37.9S 73.7W mb=5.3 GUC Los Rios at Valdivia; IV in Co

P: 6APR2021 132815 37.0S 74.0W 4.0-5.4 BAAAA Central Chile

GUC reported this earthquake was felt with intensity V in Los Rios at Valdivia; IV in Corral, Los Lagos, Mariquina, Mehuin; II in Futurono, Lago Ranco, Mafil, Rio Bueno and in Araucania with IV in Gorbea, Pucon, Queule, Villarca, III in Carahue, Nueva Imperial, Padre las Casas, Pitrufquen, Saavedra, Temuco, Teodoro Schmidt, Tolten, Vilcun, Chile.

NEIC reported this earthquake of M 5.3 in Bio-Bio, Chile was felt with intensity II-III in the area(s) of Araucania, Chile at Traiguen, Temuco.

O: 10APR2021 16:33 39.5S 73.1W mb=4.7 GUC BioBio at Los Alamos and Tirul

P: 6APR2021 132815 39.0S 73.0W 4.0-5.4 BAAAA Central Chile

GUC reported this earthquake was felt with intensity V in BioBio at Los Alamos and Tirula, IV in Lebuc, III in Concepcion, Hualpen, Los Angeles, Loa, Talcahuano; IV in La Araucania at Angol, Carahue, Collipulli, Curacautino, Galvannoc, Lautaro, Los Sauces, Lumaco, Nueva Imperial, Traiguen, Victoria, Villarica and V in Puern and Renaico and III in Los Rios at Panguipulli and Valdivia, Chile.

NEIC reported this earthquake of M 4.7 in Los Lagos, Chile was felt with intensity II-III in the area(s) of Los Lagos, Chile at Valdivia (IV) and Osorno and in Lonchche, Araucania.

O: 11APR2021 01:50:08 7.0S 80.3W ML=4.0 EMSC OFF COAST OF NORTHERN PERU

P: 10APR2021 132589 6.0S 79.0W 4.0-5.4 AAAAA No. Peru

O: 11APR2021 04:21:02 9.3S 71.4W mb=4.1 EMSC PERU-BRAZIL BORDER REGION

P: 7APR2021 132785 14.0S 71.0W 4.0-5.9 BCAAA Central Peru

O: 11APR2021 02:17:35 10.9N 86.4W ML=4.0 EMSC OFF COAST OF COSTA RICA

O: 11APR2021 01:42:26 11.0N 86.4W mb=4.6 EMSC OFF COAST OF COSTA RICA

P: 7APR2021 132617 13.0N 87.0W 3.5-5.8 BBAAA Nicaragua

O: 11APR2021 05:37:18 15.8N 93.9W mb=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 8APR2021 132605 16.0N 93.0W 3.5-5.3 BAAAA Chiapas, Mexico

O: 10APR2021 07:07:36 16.1N 95.2W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

P: 8APR2021 132605 16.0N 93.0W 3.5-5.3 AABAA Chiapas, Mexico

O: 10APR2021 23:22:30 18.4N 69.3W ML=3.2 EMSC DOMINICAN REPUBLIC REGION

O: 10APR2021 15:35:05 18.9N 70.3W ML=3.0 EMSC DOMINICAN REPUBLIC

O: 11APR2021 03:24:30 19.1N 69.6W ML=3.1 EMSC DOMINICAN REPUBLIC

P: 5APR2021 132628 20.0N 69.0W 3.0-4.7 CAAAA Bahamas/No. Caribbean

P: 8APR2021 132623 19.0N 71.0W 3.4-5.2 AAAAA Puerto Rico

O: 10APR2021 22:32:51 18.5N 101.6W ML=4.0 EMSC GUERRERO, MEXICO

P: 9APR2021 132615 18.0N 103.0W 3.5-5.4 AABAA Michoacan, Mexico

O: 11APR2021 06:18:59 18.9N 67.6W Md=3.2 EMSC PUERTO RICO REGION

P: 6APR2021 132622 18.0N 67.0W 3.4-5.1 BAAAA Puerto Rico

O: 10APR2021 10:00:02 19.1N 64.8W Md=3.5 EMSC VIRGIN ISLANDS REGION

P: 6APR2021 132612 19.0N 64.0W 3.0-5.1 BAAAA Leeward Islands

O: 10APR2021 23:47:28 24.1S 67.1W mb=4.2 EMSC SALTA, ARGENTINA

P: 8APR2021 132799 24.0S 69.0W 4.0-5.8 AABAA Coast No. Chile

O: 10APR2021 16:33:53 39.5S 73.1W Mw=4.7 EMSC LOS LAGOS, CHILE

P: 6APR2021 132815 39.0S 73.0W 4.0-5.4 BAAAA Central Chile

O: 10APR2021 07:31:02 37.9S 73.7W mb=4.4 EMSC OFFSHORE BIO-BIO, CHILE

O: 10APR2021 07:52:47 37.9S 73.7W Mw=5.3 EMSC OFFSHORE BIO-BIO, CHILE

P: 6APR2021 132815 37.0S 74.0W 4.0-5.4 BAAAA Central Chile

AFRICA AND EUROPE

O: 10APR2021 22:53:58 38.3N 20.7E mb=4.5 EMSC GREECE

P: 9APR2021 132677 39.0N 22.0E 3.0-4.5 AAAAA No. Greece

NEIC reported this earthquake of M 4.5 in Greece was felt with intensity II-III in the area(s) of Greece in Kefallinia at Sami and Argostolion.

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

SOUTHWEST PACIFIC

O: 10APR2021 09:06:56 17.5S 168.0E mb=4.5 EMSC VANUATU

P: 3APR2021 132796 17.0S 168.0E 4.0-5.5 CAAAA Vanuatu Islands

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

OCEAN RIDGES

O: 10APR2021 17:55:40 40.1S 124.5W mb=5.0 EMSC SOUTH PACIFIC OCEAN

O: 10APR2021 07:14:02 62.3S 58.3W Mw=5.5 EMSC SOUTH SHETLAND ISLANDS

P: 5APR2021 132834 61.0S 58.0W 3.0-5.6 BAAAA So. So. America

ZEALANDIA AND AUSTRALIA REGION

O: 10APR2021 17:51:32 31.6S 179.8W mb=4.9 EMSC KERMADEC ISLANDS REGION

P: 9APR2021 132819 30.0S 178.0W 4.0-5.6 ABBAA No. Kermadec Islands

O: 10APR2021 17:14:55 33.6S 179.1E ML=3.5 EMSC SOUTH OF KERMADEC ISLANDS

O: 10APR2021 23:33:15 34.4S 179.2E ML=3.8 EMSC SOUTH OF KERMADEC ISLANDS

O: 10APR2021 22:24:39 37.4S 179.9E ML=3.8 EMSC OFF E. COAST OF N. ISLAND, N.Z

O: 10APR2021 14:40:20 37.5S 179.9W mb=4.9 EMSC EAST OF NORTH ISLAND, N.Z.

O: 11APR2021 01:18:52 37.5S 179.9E ML=3.5 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 10APR2021 12:39:35 37.7S 179.7E ML=4.0 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 10APR2021 07:36:04 37.4S 180.0W ML=3.5 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 5APR2021 132818 37.0S 179.0W 3.5-5.0 BAAAA E. of North Islands N.Z.

O: 10APR2021 10:46:37 41.5S 174.5E ML=3.6 EMSC COOK STRAIT, NEW ZEALAND

O: 10APR2021 10:58:29 41.5S 174.5E ML=4.0 EMSC COOK STRAIT, NEW ZEALAND

O: 10APR2021 10:58:29 41.4S 174.5E MS=4.1 GEONET Felt with strong intensity

P: 7APR2021 132824 40.0S 175.0E 3.0-4.6 BBAAA North Island, N.Z.

GEONET reported this earthquake was felt with strong intensity in the area southwest of Wellington. 6359 reports of felt activity were made to GeoNet - 3296 of weak and 2727 of light intensity came from the area. 319 reports of moderate and 15 of strong, severe or extreme shaking were noted one person.

JAPAN AND KURIL ISLANDS

O: 10APR2021 07:36:28 29.3N 129.6E Mw=5.2 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 13:10:42 29.3N 129.5E mb=4.9 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 14:09:30 29.3N 129.3E ML=4.0 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 18:18:14 29.3N 129.5E mb=4.7 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 20:20:38 29.3N 129.4E mb=4.8 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 20:40:44 29.9N 129.3E mb=4.8 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 23:00:21 29.2N 129.4E mb=4.7 EMSC RYUKYU ISLANDS, JAPAN

P: 8APR2021 132670 31.0N 131.0E 3.5-5.2 ABAAA Kyushu, Japan area

O: 11APR2021 06:24:22 24.4N 126.6E mb=4.6 EMSC RYUKYU ISLANDS, JAPAN

P: 8APR2021 132641 25.0N 127.0E 4.0-5.5 BAAAA Ryukyu Islands

O: 10APR2021 20:01:17 45.8N 149.6E mb=4.7 EMSC KURIL ISLANDS

P: 4APR2021 132740 45.0N 150.0E 3.5-5.6 CAAAA So. Kurils

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 10APR2021 18:37:27 32.6N 115.7W Ml=2.1 EMSC BAJA CALIFORNIA, MEXICO

O: 10APR2021 13:22:04 32.7N 115.5W ML=3.3 EMSC SOUTHERN CALIFORNIA

O: 10APR2021 13:22:04 32.7N 115.5W ML=3.4 ANSS SOUTHERN CALIFORNIA

P: 4APR2021 132689 32.9N 115.6W 2.5-4.4 CAAAA So. California

NEIC reported this earthquake of M 3.4 in Southern California was felt with intensity II-III in the area(s) of Southern California at Neber, Holtville (IV), Calexico, El Centro, Imperial, Lakeside and in Yuma, Arizona.

O: 11APR2021 01:09:36 35.9N 117.7W Ml=2.4 EMSC CENTRAL CALIFORNIA

P: 8APR2021 132696 35.8N 117.6W 2.5-4.9 BAAAA So. California

O: 10APR2021 23:57:28 36.5N 114.7W ml=2.5 EMSC NEVADA

P: 10APR2021 132673 37.3N 114.9W 2.5-4.5 AAAAA Nevada area

O: 10APR2021 17:55:09 37.6N 118.9W Md=2.0 EMSC CENTRAL CALIFORNIA

P: 8APR2021 132652 37.5N 118.6W 2.5-4.8 AAAAA California/Nevada area

O: 10APR2021 11:50:13 37.6N 121.7W ML=2.7 EMSC NORTHERN CALIFORNIA

O: 10APR2021 11:50:13 37.6N 121.7W ML=2.9 ANSS NORTHERN CALIFORNIA

P: 8APR2021 132661 37.4N 121.8W 2.5-4.7 AAAAA Central California

NEIC reported this earthquake of M 2.9 in the San Francisco, California was felt with intensity II-III in the area(s) of San Francisco, California at Livermore, Pleasanton, Union City, San Ramon, Brentwood, Sunnyvale, San jose and Walnut Creek.

O: 10APR2021 11:01:59 38.8N 122.8W Md=2.0 EMSC NORTHERN CALIFORNIA

O: 10APR2021 14:13:21 38.5N 122.7W ML=3.0 EMSC NORTHERN CALIFORNIA

O: 10APR2021 14:13:21 38.5N 122.7W ML=3.3 ANSS NORTHERN CALIFORNIA

P: 7APR2021 132662 38.7N 122.7W 2.5-4.6 BAAAA Central California

NEIC reported this earthquake of M 3.3 in Northern California was felt with intensity II-III in the area(s) of Northern California at Santa Rosa, Calistoga, Deer Park, Kenwood, Angwin, Saint Helena.

O: 10APR2021 20:39:53 38.2N 117.9W ml=2.1 EMSC NEVADA

P: 8APR2021 132652 37.5N 118.6W 2.5-4.8 AAAAA California/Nevada area

O: 10APR2021 08:16:32 40.2N 121.1W Md=2.1 EMSC NORTHERN CALIFORNIA

P: 6APR2021 132731 40.7N 121.3W 2.5-4.5 BAAAA Northern California

ALASKA

O: 10APR2021 12:45:44 60.0N 149.3W ML=3.0 EMSC KENAI PENINSULA, ALASKA

P: 8APR2021 132769 60.9N 147.4W 3.2-5.1 AAAAA Central Alaska

O: 10APR2021 21:35:28 66.3N 157.3W ML=3.4 EMSC NORTHERN ALASKA

P: 5APR2021 132772 64.0N 154.0W 3.0-5.0 BCBAA Northern Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 10APR2021 07:38:15 47.5N 121.6W Ml=2.8 EMSC WASHINGTON

P: 6APR2021 132742 47.7N 120.3W 2.0-4.4 BAAAA Washington state, U.S.

NEIC reported this earthquake of M 2.8 in Washington State was felt with intensity II-III in the area(s) of Washington State at North Bend, Snoqualmie, Issaquah, Maple Valley, Black Diamond, Duvall, Redmond, Kent.

O: 10APR2021 07:34:14 48.9N 125.2W Ml=3.3 EMSC VANCOUVER ISLAND, CANADA REGIO

P: 3APR2021 132741 49.0N 126.0W 2.8-5.1 CAAAA Vancouver Island area

NEIC reported this earthquake of M 3.3 in Vancouver Island, Canada was felt with intensity II-III in the area(s) of British Columbia at Icluelet and Victoria.

ROCKY MOUNTAINS REGION

O: 11APR2021 03:02:03 39.3N 106.8W ML=2.8 EMSC COLORADO

P: 10APR2021 132666 39.2N 108.4W 2.0-3.9 AABAA Colorado area

NEIC reported this earthquake of M 2.8 in Northern Colorado was felt with intensity II-III in the area(s) of Northern Colorado at Aspen.

O: 10APR2021 17:08:29 44.2N 115.1W ML=2.6 EMSC SOUTHERN IDAHO

O: 10APR2021 08:52:15 44.3N 115.0W Ml=2.2 EMSC SOUTHERN IDAHO

O: 10APR2021 08:56:51 44.1N 115.1W Ml=2.7 EMSC SOUTHERN IDAHO

P: 6APR2021 132723 44.4N 115.1W 2.0-4.2 BAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 10APR2021 16:07:39 29.2N 97.6W mb=2.6 EMSC SOUTHERN TEXAS

O: 11APR2021 02:00:07 34.4N 97.5W ML=2.5 EMSC OKLAHOMA

O: 10APR2021 12:26:23 35.1N 95.4W ML=2.4 EMSC OKLAHOMA

O: 10APR2021 22:07:37 36.0N 98.5W ML=2.0 EMSC OKLAHOMA

O: 10APR2021 09:54:04 34.4N 97.4W ML=2.1 EMSC OKLAHOMA

P: 10APR2021 132700 35.0N 97.0W 2.0-4.3 AAAAA Southern Plains

HAWAII

O: 11APR2021 00:04:20 19.3N 155.4W ML=3.6 EMSC ISLAND OF HAWAII, HAWAII

O: 11APR2021 06:08:51 19.2N 155.5W ML=3.7 EMSC ISLAND OF HAWAII, HAWAII

P: 9APR2021 132610 19.9N 156.1W 3.0-4.7 AAAAA Hawaii

NEIC reported these earthquakes of M 3.0 and 3.1 in Hawaii were felt with intensity II-III in the area(s) of Hawaii at Naalehu, Captain Cook, Volcano, Mountain View, Kealakekua, Kailua Kona and Kamuela.

STRONG EARTHQUAKE IN NEW GUINEA PROMOTED BY TIDAL STRESSES

EARTHQUAKE SUMMARY FOR APRIL 10, 2021

The only events within about 200 km of today's epicenter within the past three years occurred as an M 6.3 on February 7, 2021 and an M 6.2 on January 17, 2019.

Forecast 132591 had expected today's event in New Guinea was likely around April 7.

O: 10APR2021 11:38:32 3.5S 145.7E Mw=6.0 EMSC NEAR N COAST OF NEW GUINEA, PN

P: 7APR2021 132591 7.0S 144.0E 4.0-5.4 BCBAA Papua New Guinea

O: 10APR2021 09:30:44 4.2N 124.6E Mw=6.1 EMSC CELEBES SEA

P: 9APR2021 132574 1.0N 124.0E 4.0-5.6 ACAAA Mindanao, Philippines

These events followed an M 6.0 felt widely in Java and noted in the previous issue of this summary as:

NEIC reported today's earthquake of M 5.1 in Java, Indonesia was felt with intensity II-III in the area(s) of Java, Indonesia at Blitar and Malang.

O: 10APR2021 12:49:20 8.9S 112.5E ML=4.2 EMSC JAVA, INDONESIA

O: 10APR2021 07:00:17 8.4S 112.6E mb=6.0 EMSC JAVA, INDONESIA

O: 10APR2021 23:54:58 8.4S 112.5E mb=5.1 EMSC JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 BACAA So. of Java

km was likely around April 5.

O: 10APR2021 07:14:02 62.3S 58.3W Mw=5.5 EMSC SOUTH SHETLAND ISLANDS

P: 5APR2021 132834 61.0S 58.0W 3.0-5.6 BAAAA So. So. America

O: 10APR2021 17:55:40 40.1S 124.5W mb=5.0 EMSC SOUTH PACIFIC OCEAN

ANTIPODAL EVENTS IN JAVA AND LA SOUFRIERE, CARIBBEAN POSSIBLY RELATED

EARTHQUAKE SUMMARY FOR APRIL 9, 2021

The strongest geophysical activity in the world today occurred at the antipodal regions of Java and St. Vincent and the Grenadines. These may have been related to energy from the tropical cyclones Odette and Seroja which have been in the region south of Java over the past several days and could have also influenced seismicity in the eastern Caribbean. TC Seroja passed over the exact antipode of La Soufriere on April 7-8.

An eruption of La Soufriere on St. Vincent and the Grenadines occurred today, the first such eruption since 1979. As many as 20,000 were evacuated as volcanic bombs, sulfur, smoke and ash fell from the eruption. A second eruption followed about 6 hours later.

This eruption was followed by the largest earthquake of the day - an M 6.0 in Java, Indonesia. This is located near the antipode of the eruption and may have been promoted by energy from that earlier event. NEIC reported this earthquake was felt with maximum intensity V in Java at Malang; IV in Srandakan and II-III in Singosari, Kertosono, Mojokerto, Surabaya, Kasihan and in Kula, Bali, Indonesia. BMG reported this earthquake with Magnitude M 5.6. That agency reported maximum intensity V at Ruren, IV at Karangkates, Malang, Bitar; III-IV in Kedin, Trenggalek, Jombang, III in Nganjuk, Ponorogo, Madiun, Yogyakarta, Ngawi, Lombok Barat, Mataram, Kuta, Jimbaran, Denpasar and II in Mojoketo, Klaren, Lombok Utara, Sumbawa, Tabanen, Klungkung and Banjamegara. This activity near the geomagnetic equator may be related to the strong geomagnetic storm of April 7. This summary had noted this in previous issues as:

It may also be related to tidal stresses associated with the coming New Moon as forecast in previous issues of this summary as:

Tropical Cyclones Seroja and Odette may also have influenced the timing of the earthquake in Java as previously reported in this summary:

"TC Seroja continued near Timor, Indonesia today with winds up to 70 kts. It is expected to track to the southwest over the next several days and may help enhance seismicity in the area of Timor." (April 6-8, 2021)

and

"TC Seroja continued south of Java, Indonesia today with winds up to 75 kts. It is expected to track to the southwest over the next several days and may help enhance seismicity in the area of Java to the north." (April 9, 2021)

"Tropical Cyclone Odette (27S) continued today in the area south of Sumatra with winds up to 65 kts. It is expected to track to the east and south over the next several days." (April 8-9, 2021)

The eruption of La Soufriere occurred at the antipode of Tropical Cyclone Seroja, perhaps supporting the antipodal occurrence of the events in the Caribbean and Java today.

Seismic enhancement in the region of the Windward Islands had been expected in forecast 132626 in early April to the south of the eruption of La Soufriere. This epicenter is at the third node (120 degrees) from both the M 7.3 off North Island, New Zealand and the M 8.1 in the Kermadec Islands of March 4, 2021 and was probably enhanced by energy from those sources.

O: 9APR2021 12:40:00 13.2N 61.1W ML=5.5 NEWS ERUPTION OF SOUFRIERE, GRENADI

P: 4APR2021 132626 11.0N 62.0W 3.4-5.1 BCAAA Windward Islands

The earthquake south of Java, Indonesia of M 6.0 is the strongest within about 200 km of that epicenter since an M 6.0 on July 25, 2015. The last such event with greater magnitude was an M 6.6 on September 28, 1998. Forecast 132592 had expected today's event in this region around April 7.

O: 10APR2021 07:00:17 8.4S 112.6E mb=6.0 EMSC JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 BABAA So. of Java

An unusual earthquake of M 4.4 shook areas of Romania today. NEIC reported this earthquake of M 4.4 in Romania was felt with intensity II-III in the area(s) of Romania at Brasov, Stefanestii, Bucharest, Popesti-Leordeni, Bragadiru, Lifov, and in Razgrad, Bulgaria. The only earthquake in Romania of larger magnitude since April, 2020 was an M 4.9 on April 24, 2020. Forecast 132738 had expected today's event within about 50 km of this epicenter was likely around April 6. This epicenter is located at 144 degrees from the series of events including the M 7.7 in the Loyalty Islands of early February and was probably promoted by energy from that source.

O: 9APR2021 18:36:47 45.8N 26.6E mb=4.4 EMSC ROMANIA

P: 5APR2021 132738 46.0N 26.0E 3.0-5.0 BAAAA Romania/NW Turkey

An earthquake of M 3.3 in northern New Mexico was felt in the epicentral area today. The only earthquake within about 100 km of this epicenter with M>=3.3 in New Mexico in the past 10 years was an M 3.7 near today's epicenter on July 30, 2020. Earthquakes of M 3.5-3.6 occurred about 100 km south of today's event on October 20, 2016 and October 17, 2011 and two events of M 3.5 and 3.7 hit the area in September, 2009 and June, 2008. Forecast 132665 had expected enhanced regional activity around April 5.

O: 9APR2021 14:49:16 36.3N 106.8W ML=3.3 EMSC NEW MEXICO

P: 5APR2021 132665 36.9N 105.1W 2.0-4.1 BABAA Colorado area

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 10APR2021 04:47:20 22.7N 121.4E mb=4.4 EMSC TAIWAN REGION

O: 9APR2021 09:10:26 24.8N 122.1E ML=4.2 TAI Hualien, Taiwan

O: 10APR2021 04:47:21 22.7N 121.3E ML=4.4 TAI Hualien, Taiwan

P: 9APR2021 132644 23.0N 121.0E 4.0-5.6 ABAAA Taiwan

CWB reported this earthquake of M 4.2 was felt with intensity II in Yilan and I in Taipei, Hualien and Hsinchu Counties, Taiwan.

The M 4.4 was felt with intensity III in Taitung, and I in Hualien and Pingtung Counties, Taiwan.

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

INDONESIA AND PHILIPPINES

O: 9APR2021 15:10:46 0.5S 131.9E ML=4.0 EMSC NEAR N COAST OF PAPUA, INDONES

P: 9APR2021 132600 5.0S 130.0E 4.0-5.5 ACBAA West Irian, PNG

O: 9APR2021 17:55:04 2.4N 128.5E mb=4.5 EMSC HALMAHERA, INDONESIA

P: 8APR2021 132572 4.0N 128.0E 4.0-5.6 ABAAA Halmahera

O: 10APR2021 00:04:57 2.8S 101.3E ML=4.4 EMSC SOUTHERN SUMATRA, INDONESIA

P: 2APR2021 132593 4.0S 102.0E 4.0-5.5 CBAAA So. of Sumatera

O: 09APR2021 15:14:29 4.8N 96.2E ML=4.7 EMSC NORTHERN SUMATRA, INDONESIA

O: 9APR2021 08:08:59 3.1N 96.4E mb=4.3 EMSC NORTHERN SUMATRA, INDONESIA

P: 7APR2021 132576 4.0N 96.0E 4.0-5.8 AAAAA Nicobar Islands

O: 9APR2021 13:39:47 6.2N 126.0E ML=4.2 EMSC MINDANAO, PHILIPPINES

P: 9APR2021 132573 6.0N 127.0E 4.0-5.8 AAAAA Halmahera

O: 9APR2021 06:42:46 7.7S 127.7E ML=4.5 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 5APR2021 132580 6.0S 128.0E 4.0-5.4 BBAAA Banda Sea

O: 9APR2021 20:09:06 8.3S 117.3E ML=4.0 EMSC SUMBAWA REGION, INDONESIA

P: 8APR2021 132596 8.0S 117.0E 4.0-5.4 AAAAA Sumbawa Island area

O: 10APR2021 07:00:17 8.4S 112.6E mb=6.0 EMSC JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 BABAA So. of Java

CENTRAL AND SOUTH AMERICA

O: 10APR2021 05:16:30 9.6N 84.9W ML=4.0 EMSC COSTA RICA

P: 5APR2021 132603 10.0N 84.0W 3.5-5.5 BAAAA Caribbean Sea

O: 9APR2021 12:40:00 13.2N 61.1W ML=5.5 NEWS ERUPTION OF SOUFRIERE, GRENADI

P: 4APR2021 132626 11.0N 62.0W 3.4-5.1 BCAAA Windward Islands

O: 09APR2021 07:36:58 17.0N 99.6W ML=4.3 EMSC GUERRERO, MEXICO

O: 9APR2021 22:42:22 16.8N 98.8W ML=4.0 EMSC GUERRERO, MEXICO

P: 6APR2021 132621 17.0N 98.0W 3.5-5.2 BAAAA Oaxaca, Mexico

O: 9APR2021 08:18:41 17.0N 93.9W ML=4.2 EMSC OAXACA, MEXICO

P: 8APR2021 132605 16.0N 93.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 9APR2021 19:00:11 27.6N 111.6W ML=3.6 EMSC GULF OF CALIFORNIA

P: 9APR2021 132632 28.0N 112.0W 3.5-5.3 AAAAA Gulf of California

O: 9APR2021 06:53:18 29.7S 69.6W Mw=4.3 EMSC SAN JUAN, ARGENTINA

P: 6APR2021 132798 29.0S 68.0W 4.0-5.6 BABAA Argentina

P: 7APR2021 132812 31.0S 70.0W 4.0-5.8 ABAAA Central Chile

AFRICA AND EUROPE

O: 9APR2021 18:36:47 45.8N 26.6E mb=4.4 EMSC ROMANIA

P: 5APR2021 132738 46.0N 26.0E 3.0-5.0 BAAAA Romania/NW Turkey

O: 10APR2021 05:55:01 46.5N 14.4E ML=2.9 EMSC AUSTRIA

P: 9APR2021 132710 45.0N 16.0E 3.0-5.1 ABBAA Adriatic Sea

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

SOUTHWEST PACIFIC

O: 09APR2021 12:00:40 18.0S 178.4W mb=4.2 EMSC FIJI REGION

O: 9APR2021 11:24:29 17.7S 178.7W Mw=5.2 EMSC FIJI REGION

P: 5APR2021 132795 17.0S 179.0W 4.0-5.6 BAAAA Tonga Islands

O: 10APR2021 01:32:18 23.5S 171.8E mb=4.6 EMSC SOUTHEAST OF LOYALTY ISLANDS

O: 10APR2021 04:15:54 20.0S 169.2E Mw=5.1 EMSC VANUATU

O: 9APR2021 12:51:29 23.4S 171.8E Mw=5.0 EMSC SOUTHEAST OF LOYALTY ISLANDS

P: 6APR2021 132800 23.0S 171.0E 4.0-5.4 BAAAA Loyalty Islands

OCEAN RIDGES

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

ZEALANDIA AND AUSTRALIA REGION

O: 9APR2021 20:43:14 30.2S 180.0E ML=4.6 EMSC KERMADEC ISLANDS REGION

P: 9APR2021 132801 28.0S 177.0W 4.0-5.6 ACBAA No. Kermadec Islands

O: 9APR2021 18:36:11 37.7S 179.8E ML=3.7 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 5APR2021 132819 38.0S 177.0E 3.0-4.6 BABAA North Island, N.Z.

O: 9APR2021 11:14:16 39.8S 175.9E ML=3.9 EMSC NORTH ISLAND OF NEW ZEALAND

P: 7APR2021 132824 40.0S 175.0E 3.0-4.6 AAAAA North Island, N.Z.

O: 9APR2021 11:21:30 40.1S 173.1E ML=3.6 EMSC COOK STRAIT, NEW ZEALAND

P: 7APR2021 132824 40.0S 175.0E 3.0-4.6 AABAA North Island, N.Z.

JAPAN AND KURIL ISLANDS

O: 10APR2021 01:54:56 29.3N 129.3E mb=4.4 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 05:07:30 29.3N 129.3E ML=4.4 EMSC RYUKYU ISLANDS, JAPAN

O: 10APR2021 06:52:11 29.3N 129.5E ML=4.8 EMSC RYUKYU ISLANDS, JAPAN

O: 9APR2021 22:07:32 29.3N 129.4E Mw=5.3 EMSC RYUKYU ISLANDS, JAPAN

P: 5APR2021 132635 29.0N 131.0E 4.0-5.4 BABAA Kyushu Japan

P: 8APR2021 132670 31.0N 131.0E 3.5-5.2 ABBAA Kyushu, Japan area

O: 9APR2021 16:59:30 37.7N 141.8E ML=4.3 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 7APR2021 132683 38.0N 140.0E 4.0-5.6 AABAA Off East Coast Honshu

NEIC reported this earthquake of M 4.3 in Iwate, Japan was felt with intensity II-III in the area(s) of Iwate, Japan at Miyako.

O: 9APR2021 08:54:08 40.0N 141.5E mb=4.3 EMSC NEAR EAST COAST OF HONSHU, JAP

P: 9APR2021 132716 40.0N 142.0E 3.5-5.6 AAAAA Hokkaido, Japan

U.S./CANADA*

WESTERN U.S./CANADA

CALIFORNIA

O: 09APR2021 20:29:53 33.1N 115.6W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 9APR2021 08:47:05 32.8N 115.8W Ml=2.1 EMSC SOUTHERN CALIFORNIA

P: 4APR2021 132689 32.9N 115.6W 2.5-4.4 BAAAA So. California

O: 10APR2021 03:57:57 34.2N 116.5W ML=2.8 EMSC SOUTHERN CALIFORNIA

O: 10APR2021 03:57:57 34.2N 116.5W ML=3.0 ANSS SOUTHERN CALIFORNIA

P: 8APR2021 132694 34.3N 116.5W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 3.0 in Yucca Valley, Southern California was felt with intensity II-III in the area(s) of Yucca Valley, Southern California at Joshua Tree, Morongo Valley, Twentynine Palms, San Bernardino, Apple Valley, Desert Center, Fallbrook, Chino and Irvine.

O: 9APR2021 21:31:31 35.9N 115.3W ml=2.1 EMSC NEVADA

P: 10APR2021 132673 37.3N 114.9W 2.5-4.5 ABAAA Nevada area

P: 10APR2021 132694 35.5N 116.4W 2.5-4.5 AAAAA So. California

O: 9APR2021 22:54:49 35.9N 117.7W Ml=2.2 EMSC CENTRAL CALIFORNIA

P: 8APR2021 132696 35.8N 117.6W 2.5-4.9 AAAAA So. California

O: 9APR2021 23:12:21 40.3N 123.2W Md=2.3 EMSC NORTHERN CALIFORNIA

P: 5APR2021 132663 39.7N 123.7W 2.5-4.4 BAAAA Central California

O: 9APR2021 10:10:56 40.4N 124.4W Md=2.1 EMSC OFFSHORE NORTHERN CALIFORNIA

P: 7APR2021 132732 40.6N 124.9W 2.5-4.5 AAAAA Off Coast of No. Calif

O: 9APR2021 13:08:50 40.9N 121.9W Md=2.0 EMSC NORTHERN CALIFORNIA

P: 6APR2021 132731 40.7N 121.3W 2.5-4.5 BAAAA Northern California

ALASKA

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

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 9APR2021 13:42:43 51.2N 131.2W MB=3.6 ECAN Bella Bella, BC

P: 7APR2021 132753 50.4N 130.2W 3.0-5.0 AAAAA British Colombia

ROCKY MOUNTAINS REGION

O: 9APR2021 21:26:33 31.6N 104.3W ML=2.7 EMSC WESTERN TEXAS

P: 7APR2021 132687 32.6N 104.6W 2.0-3.9 AAAAA SW U.S.A

O: 9APR2021 14:49:16 36.3N 106.8W ML=3.3 EMSC NEW MEXICO

P: 5APR2021 132665 36.9N 105.1W 2.0-4.1 BABAA Colorado area

O: 9APR2021 12:34:29 44.3N 115.1W Ml=2.7 EMSC SOUTHERN IDAHO

P: 6APR2021 132723 44.4N 115.1W 2.0-4.2 BAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 10APR2021 05:49:07 29.2N 97.7W mb=3.2 EMSC SOUTHERN TEXAS

O: 9APR2021 08:15:25 35.2N 95.3W ML=2.0 EMSC OKLAHOMA

P: 10APR2021 132700 35.0N 97.0W 2.0-4.3 AABAA Southern Plains

HAWAII

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

MODERATELY STRONG QUAKE IN CENTRAL ALASKA

EARTHQUAKE SUMMARY FOR APRIL 8, 2021

The strongest earthquake in the world today was an M 5.5 in Central Alaska near Cantwell. NEIC reported maximum intensity with this quake was V in Cantwell; IV in Matanuska-Sustina border, Healy, Talkeetna, and III in Anderson, Fairbanks, Delta Junction, Glennallen, Clear and Palmer, Alaska. This is the strongest earthquake within about 200 km of this epicenter in Central Alaska since an M 7.9 in the Denali area of Alaska of November 3, 2002. An earthquake of M 7.0 occurred about 250 km southwest of this in the Anchorage, Alaska area on November 30, 2018 and as an M 6.8 on December 4, 2012. Forecast 132771 had expected today's event within about 25 km of this epicenter was likely in early April around April 4. The last earthquake in Alaska outside the Andreanof Islands of M>=5.5 occurred with the M 7.6 in the Alaska Peninsula on October 19, 2020. The last such event in central, southern or eastern Alaska was the M 7.0 near Anchorage on November 30, 2018. In the previous issue of this summary, increased seismicity in Alaska had been noted as:

"The strongest earthquake in the U.S. or Canada today was an M 4.9 in the western Fox Islands, Aleutians, Alaska. It was not reported felt in this remote area. This is the strongest earthquake in the Fox Islands in the past four months - since an M 6.4 on December 1, 2020 about 50 km to the east of today's epicenter. Forecast 132755 had expected today's event was likely in this area of the Fox Islands around April 4. Seismicity in Alaska has been quiet in recent weeks and today's event may preceded enhanced regional seismicity associated with the strong geomagnetic storm at high latitudes which reached maximum near this time. This summary had noted this geomagnetic storm as:" (April 8, 2021)

Today's event in Central Alaska was located at 103 degrees from the M 7.3 off North Island, New Zealand of March 4. Triggering of seismicity at this distance from large earth disturbances is common and energy from the New Zealand event probably helped promote today's earthquake in Alaska. Strong aftershocks in New Zealand both north of North Island and in the Kermadec Islands are still continuing.

O: 8APR2021 17:10:18 63.2N 148.7W Mw=5.5 EMSC CENTRAL ALASKA

P: 4APR2021 132771 63.0N 148.6W 3.2-5.0 BAAAA Central Alaska

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 8APR2021 12:53:41 30.8N 71.2E ML=4.0 EMSC PAKISTAN

P: 7APR2021 132640 29.0N 68.0E 3.5-4.9 ABBAA Pakistan

O: 9APR2021 05:54:46 42.6N 79.8E mb=4.1 EMSC EASTERN KAZAKHSTAN

P: 5APR2021 132719 42.0N 82.0E 4.0-5.4 BABAA Kirgizstan/Xinjiang

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

INDONESIA AND PHILIPPINES

O: 8APR2021 17:48:57 1.1N 124.2E ML=4.0 EMSC MINAHASA, SULAWESI, INDONESIA

P: 9APR2021 132574 1.0N 124.0E 4.0-5.6 AAAAA Mindanao, Philippines

O: 8APR2021 17:40:41 3.8N 95.8E mb=4.4 EMSC OFF W COAST OF NORTHERN SUMATR

P: 7APR2021 132576 4.0N 96.0E 4.0-5.8 AAAAA Nicobar Islands

O: 9APR2021 04:59:07 4.3N 126.2E ML=4.3 EMSC KEPULAUAN TALAUD, INDONESIA

P: 10APR2021 132574 6.0N 126.0E 4.0-5.4 ABAAA Mindanao, Philippines

O: 9APR2021 06:42:46 7.7S 127.7E ML=4.5 EMSC KEPULAUAN BARAT DAYA, INDONESI

P: 5APR2021 132580 6.0S 128.0E 4.0-5.4 BBAAA Banda Sea

O: 8APR2021 21:40:57 10.4S 113.6E ML=4.1 EMSC SOUTH OF JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 ABCAA So. of Java

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

CENTRAL AND SOUTH AMERICA

O: 9APR2021 06:53 29.7S 69.8W mb=4.5 GUC Coquimbo at La Higuera; III in

P: 7APR2021 132812 31.0S 70.0W 4.0-5.8 AAAAA Central Chile

GUC reported this earthquake was felt with intensity IV in Coquimbo at La Higuera; III in Andacollo, Paiguano and II in Rio Hurtado and in Atacama with III in San Felix, El Transito, Conay, Alto del Carmen and Vallenar, Chile.

O: 9APR2021 02:02 33.8S 70.3W mb=4.6 GUC O'Higgins at Codegua, Graneros

P: 4APR2021 132813 33.0S 71.0W 4.0-5.8 BAAAA Central Chile

GUC reported this earthquake was felt with intensity IV in O'Higgins at Codegua, Graneros, La Estrella, Machale, Mostazal, Rancagua,Rengo, San Fernando; III in Marchihue,and II in Chimbarongo; in Maujle with III in Rauco, II in Constitucion, Curico, Hualane and Sagrada Familia; in Santiago with IV in Curacavi; III in El Monte, Pedro Aguirre Cerda and Santiago and II in Puente Alto and San Jose de Maipo; and in Valparaiso with III in Quilotta and II in Olmue and San Antonio, Chile.

O: 8APR2021 21:40:57 10.4S 113.6E ML=4.1 EMSC SOUTH OF JAVA, INDONESIA

P: 7APR2021 132592 9.0S 110.0E 4.0-5.4 ABCAA So. of Java

O: 8APR2021 07:59:43 7.5S 74.6W mb=4.3 EMSC NORTHERN PERU

P: 10APR2021 132589 6.0S 79.0W 4.0-5.4 ABCAA No. Peru

O: 8APR2021 09:08:29 1.4S 80.4W ML=4.4 EMSC NEAR COAST OF ECUADOR

P: 9APR2021 132583 1.0S 81.0W 4.0-5.4 AAAAA Ecuador

O: 08APR2021 23:28:11 15.0N 94.5W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO

O: 09APR2021 02:32:17 15.5N 94.9W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO

O: 08APR2021 07:01:28 16.5N 95.2W ML=4.1 EMSC OAXACA, MEXICO

O: 08APR2021 10:18:00 16.5N 95.7W ML=4.2 EMSC OAXACA, MEXICO

O: 8APR2021 17:59:19 14.7N 93.4W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO

P: 9APR2021 132604 14.0N 94.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 8APR2021 22:12:07 17.4N 68.7W ML=3.5 EMSC DOMINICAN REPUBLIC REGION

P: 6APR2021 132622 18.0N 67.0W 3.4-5.1 AABAA Puerto Rico

O: 8APR2021 17:00:14 18.0N 97.6W ML=4.4 EMSC OAXACA, MEXICO

P: 6APR2021 132621 17.0N 98.0W 3.5-5.2 AAAAA Oaxaca, Mexico

O: 8APR2021 09:08:13 18.5N 69.0W ML=3.0 EMSC DOMINICAN REPUBLIC

O: 09APR2021 02:32:05 18.8N 69.6W ML=3.3 EMSC DOMINICAN REPUBLIC

P: 8APR2021 132623 19.0N 71.0W 3.4-5.2 AABAA Puerto Rico

O: 9APR2021 06:53:19 29.7S 69.7W Mw=4.3 EMSC SAN JUAN, ARGENTINA

P: 6APR2021 132798 29.0S 68.0W 4.0-5.6 BABAA Argentina

P: 7APR2021 132812 31.0S 70.0W 4.0-5.8 ABAAA Central Chile

O: 9APR2021 02:02:09 33.8S 70.3W mb=4.8 EMSC REGION METROPOLITANA, CHILE

P: 4APR2021 132813 33.0S 71.0W 4.0-5.8 BAAAA Central Chile

AFRICA AND EUROPE

O: 8APR2021 15:23:06 36.4N 27.1E mb=4.2 EMSC DODECANESE IS.-TURKEY BORDER R

P: 8APR2021 132648 37.0N 27.0E 3.0-4.6 AAAAA Aegean Sea

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: 8APR2021 10:25:14 34.8S 108.0W mb=4.5 EMSC SOUTHERN EAST PACIFIC RISE

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

ZEALANDIA AND AUSTRALIA REGION

O: 8APR2021 12:19:49 28.8S 176.6W mb=4.6 EMSC KERMADEC ISLANDS REGION

P: 9APR2021 132801 28.0S 177.0W 4.0-5.6 AAAAA No. Kermadec Islands

O: 08APR2021 15:07:22 33.0S 179.8E ML=3.5 EMSC SOUTH OF KERMADEC ISLANDS

O: 8APR2021 21:56:57 33.6S 179.8E ML=3.8 EMSC SOUTH OF KERMADEC ISLANDS

P: 5APR2021 132822 33.0S 178.0W 4.0-5.6 BABAA So. Kermadec Islands

O: 08APR2021 22:29:05 37.8S 179.6E ML=3.6 EMSC OFF E. COAST OF N. ISLAND, N.Z.

O: 9APR2021 03:48:09 37.5S 179.9E ML=3.5 EMSC OFF E. COAST OF N. ISLAND, N.Z

P: 5APR2021 132819 38.0S 177.0E 3.0-4.6 BABAA North Island, N.Z.

O: 9APR2021 04:55:52 39.5S 174.9E ML=4.0 EMSC NORTH ISLAND OF NEW ZEALAND

P: 7APR2021 132824 40.0S 175.0E 3.0-4.6 AAAAA North Island, N.Z.

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: 9APR2021 01:26:09 32.7N 115.3W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 10:49:20 32.8N 115.4W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 11:05:09 32.8N 115.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA

O: 09APR2021 03:31:45 32.8N 115.4W ML=2.5 EMSC SOUTHERN CALIFORNIA

O: 09APR2021 03:57:12 32.8N 115.4W ML=2.6 EMSC SOUTHERN CALIFORNIA

O: 09APR2021 04:30:57 32.8N 115.5W Ml=2.0 EMSC SOUTHERN CALIFORNIA

P: 4APR2021 132689 32.9N 115.6W 2.5-4.4 BAAAA So. California

NEIC reported these earthquakes of M 2.8, 2.8 in Southern California were felt with intensity II-III in the area(s) of Southern California at Holtville and in Baja at Puebla.

O: 8APR2021 11:19:38 33.8N 117.0W Ml=2.8 EMSC SOUTHERN CALIFORNIA

O: 9APR2021 00:33:46 33.9N 116.8W ML=2.9 EMSC SOUTHERN CALIFORNIA

P: 8APR2021 132694 34.3N 116.5W 2.5-4.4 AAAAA So. California

NEIC reported this earthquake of M 2.8 in San Jacinto, Southern California was felt with intensity II-III in the area(s) of San Jacinto, Southern California in Nuevo, Hemet, Banning, Sun City, Idyllwild, and Menifee.

NEIC reported this earthquake of M 3.3 in Cabazon, Southern California was felt with intensity II-III in the area(s) of Cabazon, Southern California at White Water, Bannng, Idyllwild, Beaumont, San Jacinto, Palm Springs, Yucaipa, Calimesa.

O: 8APR2021 09:27:03 34.7N 120.5W Ml=2.1 EMSC CENTRAL CALIFORNIA

P: 8APR2021 132695 34.9N 119.0W 2.5-5.1 AABAA So. California

O: 8APR2021 20:51:13 35.6N 117.5W ML=3.3 EMSC SOUTHERN CALIFORNIA

P: 8APR2021 132696 35.8N 117.6W 2.5-4.9 AAAAA So. California

NEIC reported this earthquake of M 3.6 in Ridgecrest, Southern California was felt with intensity II-III in the area(s) of Ridgecrest, Southern California in Trona,Inyokern, Palmdale.

O: 08APR2021 16:59:28 38.2N 117.9W ml=2.1 EMSC NEVADA

O: 8APR2021 14:07:41 38.2N 117.8W ml=2.5 EMSC NEVADA

P: 4APR2021 132654 38.2N 118.8W 2.5-4.6 BAAAA California/Nevada area

O: 8APR2021 20:33:17 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA

P: 7APR2021 132662 38.7N 122.7W 2.5-4.6 AAAAA Central California

O: 09APR2021 02:06:57 40.3N 124.9W ML=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 08APR2021 21:40:53 40.4N 124.5W Md=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA

O: 9APR2021 00:39:31 40.2N 124.2W Md=2.5 EMSC NORTHERN CALIFORNIA

P: 7APR2021 132732 40.6N 124.9W 2.5-4.5 AAAAA Off Coast of No. Calif

O: 9APR2021 05:19:49 41.3N 116.2W ML=3.4 EMSC NEVADA

P: 2APR2021 132712 40.0N 117.9W 2.5-4.8 CBBAA California/Nevada area

ALASKA

O: 8APR2021 15:02:47 52.9N 173.4W mb=4.2 EMSC ANDREANOF ISLANDS, ALEUTIAN IS

P: 8APR2021 132752 51.2N 174.4W 3.5-4.9 ABAAA Andreanoff Isls, Aleutians

O: 8APR2021 17:10:18 63.2N 148.7W Mw=5.5 EMSC CENTRAL ALASKA

P: 4APR2021 132771 63.0N 148.6W 3.2-5.0 BAAAA Central Alaska

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

O: 8APR2021 19:10:18 50.0N 115.0W Ml=2.8 EMSC BRITISH COLUMBIA, CANADA

P: 3APR2021 132748 52.0N 115.0W 2.0-4.3 BBAAA Alberta

ROCKY MOUNTAINS REGION

O: 8APR2021 16:32:05 31.7N 104.4W ML=3.1 EMSC WESTERN TEXAS

P: 7APR2021 132687 32.6N 104.6W 2.0-3.9 AAAAA SW U.S.A

O: 08APR2021 08:43:28 44.5N 115.2W ML=2.3 EMSC SOUTHERN IDAHO

O: 08APR2021 19:16:26 45.9N 115.2W Ml=2.1 EMSC NORTHERN IDAHO

O: 8APR2021 13:54:06 44.3N 115.2W Ml=2.1 EMSC SOUTHERN IDAHO

P: 6APR2021 132723 44.4N 115.1W 2.0-4.2 AAAAA Montana/Idaho

EASTERN U.S./CANADA

O: 8APR2021 08:49:53 47.7N 69.9W MB=2.0 ECAN Charlevoix Seismic Zone

P: 10APR2021 132721 47.0N 70.0W 2.0-3.9 AAAAA Maine

O: 8APR2021 00:11:18 49.3N 90.9W MB=2.2 ECAN Atikokan, ON

O: 7APR2021 23:10:41 46.6N 76.0W MB=2.2 ECAN Maniwaki, QC

P: 5APR2021 132728 45.0N 75.0W 2.0-4.0 ABAAA New York State

O: 09APR2021 00:03:09 35.1N 95.3W ML=2.2 EMSC OKLAHOMA

O: 08APR2021 18:33:40 35.2N 95.3W ML=2.8 EMSC OKLAHOMA

O: 08APR2021 22:10:28 35.2N 95.3W ML=2.1 EMSC OKLAHOMA

O: 8APR2021 07:17:45 34.4N 97.5W ML=2.4 EMSC OKLAHOMA

P: 10APR2021 132700 35.0N 97.0W 2.0-4.3 AAAAA Southern Plains

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

O: 8APR2021 17:43:33 29.2N 97.7W mb=2.7 EMSC SOUTHERN TEXAS

HAWAII

NEIC reported an earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Volcano.

NORTHERN KERMADEC ISLANDS REMAINS ACTIVE

EARTHQUAKE SUMMARY FOR APRIL 7, 2021

The region of the northern Kermadec Islands remained at active seismic conditions today with several events near M 6.0 and a number of other aftershocks of M>5 of the M 8.1 of March 4, 2021 occurring today. This active was not reported felt in this remote area. As it occurred near the geomagnetic equator, it may have been enhanced by today's strong geomagnetic storm. While an M 6.0 hit in the central Kermadec Islands on April 1, 2021, today's event of M 6.0 in the strongest in the northern Kermadec Islands since immediate aftershocks of the mainshock of March 4 up to about March 6. Forecast 132801 had expected today's activity within about 100 km in the northern Kermadecs was likely around April 6.

O: 07APR2021 19:58:40 28.8S 176.7W mb=4.8 EMSC KERMADEC ISLANDS REGION

O: 07APR2021 13:34:56 28.9S 176.5W mb=5.2 EMSC KERMADEC ISLANDS REGION

O: 07APR2021 19:43:00 28.9S 176.5W Mw=5.6 EMSC KERMADEC ISLANDS REGION

O: 07APR2021 09:53:29 29.0S 176.6W Mw=6.0 EMSC KERMADEC ISLANDS REGION

O: 07APR2021 18:48:05 29.0S 176.7W Mw=5.8 EMSC KERMADEC ISLANDS REGION

O: 07APR2021 10:26:51 29.1S 176.6W Mw=5.2 EMSC KERMADEC ISLANDS REGION

O: 07APR2021 13:15:37 29.1S 176.7W Mw=5.1 EMSC KERMADEC ISLANDS REGION

O: 08APR2021 01:00:39 29.1S 176.4W mb=5.4 EMSC KERMADEC ISLANDS REGION

O: 7APR2021 10:42:05 28.8S 176.7W Mw=5.4 EMSC KERMADEC ISLANDS REGION

P: 6APR2021 132801 28.0S 176.0W 4.0-5.6 AAAAA No. Kermadec Islands

An unusual earthquake of M 4.5 in the Caribbean Sea north of Colombia occurred today. NEIC reported this earthquake of M 4.5 north of Colombia was felt with intensity II-III in the area(s) of Providencia, Colombia. The last earthquake within about 200 km of this epicenter with larger magnitude than today's M 4.5 occurred as an M 6.0 and aftershocks on November 25, 2018. Today's event is probably an aftershock of that event. Forecast 132603 had expected today's activity to the southwest around April 5. This epicenter is at 102 degrees from the M 8.1 in the Kermadec Islands and was probably promoted by energy from that source.

O: 7APR2021 10:46:01 13.1N 81.3W mb=4.5 EMSC CARIBBEAN SEA

P: 5APR2021 132603 10.0N 84.0W 3.5-5.5 ACCAA Caribbean Sea

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the western Fox Islands, Aleutians, Alaska. It was not reported felt in this remote area. This is the strongest earthquake in the Fox Islands in the past four months - since an M 6.4 on December 1, 2020 about 50 km to the east of today's epicenter. Forecast 132755 had expected today's event was likely in this area of the Fox Islands around April 4. Seismicity in Alaska has been quiet in recent weeks and today's event may preceded enhanced regional seismicity associated with the strong geomagnetic storm at high latitudes which reached maximum near this time. This summary had noted this geomagnetic storm as:

O: 7APR2021 19:31:58 52.6N 169.2W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS

P: 4APR2021 132755 53.7N 167.0W 3.5-5.2 BBBAA Fox Islands, Aleutians

A series of earthquakes of M>=3 occurred today in the western U.S. This was

a considerable enhancement of regional seismicity associated with today's geomagnetic storm. It included events in Hawaii (M 3.0, 3.0); Arizona (M 3.3); Idaho (M 3.2); northern Utah (M 3.0); off the coast of Oregon (M 3.1);

Northern Nevada (M 3.2); Central California (M 3.3); southern California (M 3.6); Oklahoma (M 3.8); Baja/Southern California (M 3.5). Most of this activity was lightly felt near the epicenter and had been expected in early April in the forecasts of this summary. The most active of these was the region of Southern California near the Baja California border where a series of light earthquakes accompanied the M 3.5. NEIC reported these earthquakes of M 3.5 and 3.7 in Southern California near the Baja border was felt with intensity II-III in the area(s) of Southern California near the Baja border in Heber (IV), Holtville, Calexico, Mexicali, El Centro, Imperial, Brawley, and Palm Springs. Forecast 132689 had expected this activity was likely within about 15 km in early April.

O: 08APR2021 02:00:40 32.8N 115.5W Ml=2.4 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 02:08:32 32.8N 115.5W ML=2.6 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 02:41:51 32.8N 115.4W Ml=2.2 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 03:28:50 32.8N 115.5W ML=2.8 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 03:38:12 32.8N 115.4W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 03:52:07 32.8N 115.5W ML=3.5 EMSC SOUTHERN CALIFORNIA

O: 08APR2021 04:12:54 32.8N 115.5W Ml=2.1 EMSC SOUTHERN CALIFORNIA

O: 8APR2021 03:57:46 32.7N 115.4W ML=2.5 EMSC SOUTHERN CALIFORNIA

P: 4APR2021 132689 32.9N 115.6W 2.5-4.4 BAAAA So. California

O: 8APR2021 03:02:54 19.3N 155.5W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII

O: 8APR2021 05:47:27 20.5N 156.0W ML=3.0 EMSC MAUI REGION, HAWAII

P: 7APR2021 132633 20.1N 156.1W 4.0-5.7 AAAAA Hawaii area

O: 7APR2021 09:20:59 35.2N 111.6W ML=3.3 EMSC ARIZONA

P: 4APR2021 132705 37.0N 111.8W 2.0-3.9 BBAAA Utah area

NEIC reported this earthquake of M 3.3 in Arizona was felt with intensity II-III in the area(s) of Arizona at Flagstaff, Prescott, Phoenix (IV), Peoria, Apache Junction, and Yuma.

O: 8APR2021 05:45:29 37.8N 113.0W ML=3.0 EMSC UTAH

P: 6APR2021 132705 37.7N 113.9W 2.0-4.0 AAAAA Utah area

NEIC reported this earthquake of M 3.0 in Utah was felt with intensity II-III in the area(s) of Utah in Brian Head and Cedar City.

O: 07APR2021 17:07:33 44.4N 115.2W Ml=3.2 EMSC SOUTHERN IDAHO

P: 6APR2021 132723 44.4N 115.1W 2.0-4.2 AAAAA Montana/Idaho

O: 7APR2021 09:40:05 44.2N 129.3W ML=3.1 EMSC OFF COAST OF OREGON

P: 6APR2021 132733 44.5N 129.8W 3.0-4.7 AAAAA Off Coast of Oregon

O: 7APR2021 13:17:30 40.9N 117.2W ml=3.2 EMSC NEVADA

P: 2APR2021 132712 40.0N 117.9W 2.5-4.8 BAAAA California/Nevada area

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

O: 7APR2021 20:18:17 36.7N 120.7W ML=3.3 EMSC CENTRAL CALIFORNIA

P: 6APR2021 132658 36.2N 120.8W 2.5-4.9 AAAAA Central California

O: 7APR2021 13:42:05 35.6N 117.4W Ml=3.6 EMSC SOUTHERN CALIFORNIA

P: 8APR2021 132696 35.8N 117.6W 2.5-4.9 AAAAA So. California

NEIC reported this earthquake of M 3.6 in Southern California was felt with intensity II-III in the area(s) of Southern California at Trona (IV), Ridgecrest, Inyokern, Bodfish, Simi Valley.

O: 7APR2021 16:51:49 35.1N 96.3W ML=3.8 EMSC OKLAHOMA

P: 6APR2021 132700 36.0N 97.0W 2.0-4.1 AAAAA Southern Plains

NEIC reported this earthquake of M 3.2-3.8 in Oklahoma was felt with intensity IV-V in the area(s) of Oklahoma at Union City, Minco, and II-III in Mustang, Tuttle, El Reno, Norman and Oklahoma City.

OTHER GLOBAL EARTHQUAKE ACTIVITY

ASIA

O: 7APR2021 13:19:36 23.8N 121.5E ML=4.9 EMSC TAIWAN

O: 7APR2021 13:19:36 23.8N 121.5E ML=4.9 TAI Hualien, Taiwan

P: 9APR2021 132644 23.0N 121.0E 4.0-5.6 AAAAA Taiwan

GUC reported this event was felt with intensity IV in Hualien; III in Taitung and Nantou; II in Yilan, Changhua, Yunlin and I in Taipei, Chiayi, Miaoli and Tainan, Counties, Taiwan.

O: 7APR2021 16:28:44 24.4N 122.0E ML=4.3 TAI Hualien, Taiwan

O: 8APR2021 00:26:21 24.7N 122.0E ML=4.5 TAI Hualien, Taiwan

P: 5APR2021 132644 23.0N 122.0E 4.0-5.4 AAAAA Taiwan

CWB reported the M 4.5 was felt with intensity II in Yilan and Hsinchu County, and I in Taipei, Tayuan, Hualien, Nantou, Miaoli Counties, Taiwan.

The M 4.3 was felt with intensity II in Yilan, and I in Hualien, Taipei, Nantou and Taipei Counties.

O: 8APR2021 04:17:21 54.7N 163.2E mb=4.3 EMSC OFF EAST COAST OF KAMCHATKA

P: 5APR2021 132754 54.0N 162.0E 4.0-5.8 BAAAA E. of Kamchatka

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

INDONESIA AND PHILIPPINES

O: 7APR2021 15:50:18 0.6N 98.4E mb=4.2 EMSC NIAS REGION, INDONESIA

P: 9APR2021 132577 0.0N 99.0E 4.0-5.4 AAAAA So. Sumatera

O: 7APR2021 12:47:07 1.3N 121.8E ML=4.2 EMSC MINAHASA, SULAWESI, INDONESIA

O: 8APR2021 05:26:53 2.9N 122.5E Mw=5.0 EMSC CELEBES SEA

P: 9APR2021 132574 1.0N 124.0E 4.0-5.6 AABAA Mindanao, Philippines

O: 8APR2021 02:26:31 3.2N 126.7E ML=4.2 EMSC KEPULAUAN TALAUD, INDONESIA

P: 8APR2021 132572 4.0N 128.0E 4.0-5.6 AABAA Halmahera

O: 8APR2021 00:57:57 3.8N 128.5E ML=4.5 EMSC NORTH OF HALMAHERA, INDONESIA

P: 8APR2021 132572 4.0N 128.0E 4.0-5.6 AAAAA Halmahera

O: 7APR2021 11:50:16 5.7S 127.8E ML=4.5 EMSC BANDA SEA

P: 5APR2021 132580 6.0S 128.0E 4.0-5.4 AAAAA Banda Sea

O: 8APR2021 01:49:03 6.6S 104.6E ML=4.6 EMSC SUNDA STRAIT, INDONESIA

P: 9APR2021 132592 7.0S 105.0E 4.0-5.5 AAAAA So. of Java

O: 7APR2021 23:50:34 6.7S 129.8E mb=4.6 EMSC BANDA SEA

P: 9APR2021 132600 5.0S 130.0E 4.0-5.5 ABAAA West Irian, PNG

CENTRAL AND SOUTH AMERICA

O: 7APR2021 17:51:30 9.3N 83.8W ML=4.3 EMSC COSTA RICA

P: 5APR2021 132603 10.0N 84.0W 3.5-5.5 AAAAA Caribbean Sea

O: 7APR2021 21:18:38 10.8S 78.0W mb=4.2 EMSC NEAR COAST OF CENTRAL PERU

P: 4APR2021 132589 9.0S 81.0W 4.0-5.8 BBCAA No. Peru

O: 7APR2021 10:46:01 13.1N 81.3W mb=4.5 EMSC CARIBBEAN SEA

P: 5APR2021 132603 10.0N 84.0W 3.5-5.5 ACCAA Caribbean Sea

O: 8APR2021 06:24:53 15.6N 93.5W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO

P: 8APR2021 132605 16.0N 93.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 7APR2021 19:33:14 16.2S 70.4W ML=4.0 EMSC SOUTHERN PERU

P: 3APR2021 132792 16.0S 71.0W 4.0-5.7 BAAAA So. Peru/Bolivia

O: 7APR2021 18:51:58 16.2N 95.6W ML=4.1 EMSC OAXACA, MEXICO

O: 7APR2021 10:30:26 16.4N 95.1W ML=4.0 EMSC OAXACA, MEXICO

O: 08APR2021 04:26:08 17.6N 94.7W ML=4.2 EMSC VERACRUZ, MEXICO

O: 7APR2021 15:49:14 17.6N 94.4W mb=4.3 EMSC VERACRUZ, MEXICO

P: 5APR2021 132605 17.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico

O: 8APR2021 01:19:41 19.3N 100.4W mb=4.6 EMSC MICHOACAN, MEXICO

P: 5APR2021 132621 19.0N 99.0W 3.5-5.3 BAAAA Oaxaca, Mexico

O: 7APR2021 21:28:20 23.2S 67.1W ML=4.2 EMSC JUJUY, ARGENTINA

O: 7APR2021 08:12:34 24.1S 66.9W mb=4.1 EMSC SALTA, ARGENTINA

P: 5APR2021 132797 24.0S 68.0W 4.0-5.8 AAAAA Argentina

O: 7APR2021 23:14:26 36.4S 70.9W mb=4.6 EMSC MAULE, CHILE

P: 5APR2021 132814 36.0S 71.0W 4.0-5.7 AAAAA Central Chile

NEIC reported this earthquake of M 4.6 in Maule, Chile was felt with intensity II-III in the area(s) of Maule, Chile at Vina del Mar.

AFRICA AND EUROPE

O: 7APR2021 23:06:18 12.8S 45.7E ML=3.3 EMSC MAYOTTE REGION

P: 4APR2021 132787 12.0S 45.0E 3.0-4.6 BAAAA Madagascar area

O: 8APR2021 00:21:48 28.6N 15.1W ML=2.1 EMSC CANARY ISLANDS, SPAIN REGION

P: 9APR2021 132630 28.0N 16.0W 3.0-4.4 AAAAA Canary Islands

O: 07APR2021 21:54:56 36.5N 27.2E mb=4.0 EMSC DODECANESE IS.-TURKEY BORDER REG

O: 07APR2021 22:35:05 36.5N 27.1E mb=4.0 EMSC DODECANESE IS.-TURKEY BORDER REG

O: 8APR2021 00:33:47 36.5N 27.2E mb=4.5 EMSC DODECANESE IS.-TURKEY BORDER R

P: 8APR2021 132648 37.0N 27.0E 3.0-4.6 AAAAA Aegean Sea

NEIC reported this earthquake of M 4.5 in the Dodecanese Islands, Greece was felt with intensity II-III in the area(s) of the Dodecanese Islands, Greece at Kardamaina and Drosia, Greece and in Datca, Turkey.

SOUTHWEST PACIFIC

O: 8APR2021 01:13:47 18.5S 169.4E mb=5.1 EMSC VANUATU

P: 3APR2021 132796 17.0S 168.0E 4.0-5.5 BBBAA Vanuatu Islands