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: 23OCT2021 10:32:38 24.1N 121.7E ML=4.5 EMSC TAIWAN
O: 24OCT2021 04:38:52 24.1N 121.6E ML=4.5 EMSC TAIWAN
O: 24OCT2021 05:12:42 24.6N 121.7E ML=5.4 EMSC TAIWAN
O: 24OCT2021 05:11:34 24.5N 121.9E Mw=6.2 EMSC TAIWAN
P: 24OCT2021 138158 24.0N 124.0E 4.0-5.4 AABAA Taiwan
P: 25OCT2021 138157 23.0N 122.0E 4.0-5.4 ABAAA Taiwan
P: 28OCT2021 138158 24.0N 123.0E 4.0-5.5 BAAAA Taiwan
O: 23OCT2021 19:57:13 39.6N 71.2E mb=4.2 EMSC KYRGYZSTAN
P: 25OCT2021 138230 41.0N 73.0E 4.0-5.4 ABBAA Kirgizstan/Xinjiang
P: 28OCT2021 138182 38.0N 72.0E 3.8-5.4 BBAAA Hindu Kush/Pakistan
O: 24OCT2021 05:59:08 35.9N 75.0E ML=4.2 EMSC NORTHWESTERN KASHMIR
P: 28OCT2021 138195 35.0N 75.0E 3.8-5.3 BAAAA Northern India
O: 23OCT2021 14:16:03 51.1N 98.1E mb=4.2 EMSC RUSSIA-MONGOLIA BORDER REGION
P: 29OCT2021 138276 51.0N 98.0E 3.0-4.7 CAAAA So. Siberia
O: 23OCT2021 08:33:30 18.8N 79.4E ML=4.0 EMSC ANDHRA PRADESH, INDIA
INDONESIA AND PHILIPPINES
O: 24OCT2021 05:28:10 1.3N 122.5E ML=4.2 EMSC MINAHASA, SULAWESI, INDONESIA
O: 23OCT2021 13:25:41 1.0N 122.0E ML=4.1 EMSC MINAHASA, SULAWESI, INDONESIA
P: 25OCT2021 138095 1.0N 124.0E 4.0-5.4 AABAA Mindanao, Philippines
O: 24OCT2021 03:22:09 1.7N 126.6E mb=4.8 EMSC MOLUCCA SEA
P: 25OCT2021 138094 2.0N 129.0E 4.0-5.6 AACAA Halmahera
O: 24OCT2021 01:30:21 2.6S 128.9E ML=4.2 EMSC CERAM SEA, INDONESIA
P: 27OCT2021 138101 3.0S 128.0E 4.0-5.4 BAAAA Ceram area
O: 24OCT2021 00:24:03 2.8S 122.1E ML=4.6 EMSC SULAWESI, INDONESIA
P: 23OCT2021 138115 1.0S 123.0E 4.0-5.6 ABAAA Sulawesi area
O: 23OCT2021 23:34:26 4.7S 102.1E mb=4.9 EMSC SOUTHERN SUMATRA, INDONESIA
P: 27OCT2021 138114 6.0S 103.0E 4.0-5.6 BBAAA So. of Sumatera
O: 23OCT2021 10:32:42 7.0S 129.9E mb=4.5 EMSC BANDA SEA
O: 23OCT2021 07:12:58 6.0S 129.1E mb=4.3 EMSC BANDA SEA
P: 22OCT2021 138118 6.0S 130.0E 4.0-5.5 AAAAA West Irian, PNG
O: 23OCT2021 23:08:33 8.5N 127.0E mb=5.0 EMSC PHILIPPINE ISLANDS REGION
P: 24OCT2021 138094 8.0N 127.0E 4.0-5.4 AAAAA Halmahera
NEIC reported this earthquake of M 5.0 in Caraga, Philippines was felt with intensity II-III in the area(s) of Caraga, Philippines at Barcelona (VI), Hinatuan (IV) and Tandag.
O: 23OCT2021 14:58:15 9.8S 118.9E mb=4.1 EMSC SUMBAWA REGION, INDONESIA
P: 26OCT2021 138304 11.0S 118.0E 4.0-5.6 BBAAA So. of Indonesia
CENTRAL AND SOUTH AMERICA
O: 24OCT2021 03:07:03 14.5N 93.8W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO
P: 26OCT2021 138124 16.0N 93.0W 3.5-5.1 ABAAA Chiapas, Mexico
O: 23OCT2021 16:34:53 16.1S 74.0W ML=4.0 EMSC NEAR COAST OF SOUTHERN PERU
P: 22OCT2021 138302 16.0S 74.0W 4.0-5.4 AAAAA So. Peru/Bolivia
O: 24OCT2021 06:33:37 16.7N 95.1W ML=4.0 EMSC OAXACA, MEXICO
P: 27OCT2021 138124 16.0N 95.0W 3.5-5.2 BAAAA Chiapas, Mexico
O: 23OCT2021 22:47:26 17.3N 62.1W mb=4.6 EMSC ANTIGUA AND BARBUDA REGION
P: 24OCT2021 138129 18.0N 62.0W 3.0-5.3 AAAAA Leeward Islands
O: 23OCT2021 21:28:36 16.9N 94.4W ML=4.0 EMSC OAXACA, MEXICO
O: 24OCT2021 05:06:17 17.3N 92.1W ML=4.0 EMSC CHIAPAS, MEXICO
P: 26OCT2021 138124 16.0N 93.0W 3.5-5.1 AAAAA Chiapas, Mexico
O: 24OCT2021 05:57:00 18.3N 68.4W Md=3.3 EMSC MONA PASSAGE, DOMINICAN REPUBL
P: 25OCT2021 138139 18.0N 67.0W 3.4-5.1 AABAA Puerto Rico
O: 23OCT2021 09:09:47 18.3N 72.1W ML=3.0 EMSC HAITI REGION
P: 16OCT2021 137874 19.0N 71.0W 3.4-4.9 CAAAA Dominican Republic
O: 23OCT2021 22:04:51 18.6N 67.1W Md=3.1 EMSC PUERTO RICO REGION
O: 23OCT2021 14:16:06 18.6N 66.2W Md=3.1 EMSC PUERTO RICO REGION
P: 25OCT2021 138139 18.0N 67.0W 3.4-5.1 AAAAA Puerto Rico
O: 23OCT2021 07:56:41 18.5N 73.9W ML=3.3 EMSC HAITI REGION
O: 24OCT2021 04:59:17 18.8N 74.1W mb=4.1 EMSC HAITI REGION
O: 23OCT2021 11:16:34 18.8N 74.0W ML=3.4 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 CAAAA Haiti
O: 23OCT2021 18:25:35 19.3N 96.3W ML=4.0 EMSC VERACRUZ, MEXICO
P: 22OCT2021 138137 18.0N 97.0W 3.5-5.5 ABAAA Oaxaca, Mexico
O: 23OCT2021 19:43:39 22.1S 68.7W mb=4.1 EMSC ANTOFAGASTA, CHILE
P: 19OCT2021 138060 23.0S 69.0W 4.0-5.4 BAAAA Coast No. Chile
O: 23OCT2021 08:21:42 24.2S 67.1W mb=4.8 EMSC SALTA, ARGENTINA
P: 22OCT2021 138313 23.0S 66.0W 4.0-5.5 ABAAA Argentina
O: 23OCT2021 20:18:17 27.3N 111.4W ML=3.7 EMSC GULF OF CALIFORNIA
P: 13OCT2021 137881 28.0N 112.0W 3.5-4.9 CAAAA Gulf of California
AFRICA AND EUROPE
O: 23OCT2021 07:28:25 28.7N 17.8W ML=4.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 23OCT2021 15:34:47 28.6N 17.8W ML=4.7 EMSC CANARY ISLANDS, SPAIN REGION
P: 23OCT2021 138144 28.0N 18.0W 3.5-4.9 AAAAA Canary Islands
SOUTHWEST PACIFIC
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 23OCT2021 14:17:52 37.5S 50.9E Mw=4.9 EMSC SOUTHWEST INDIAN RIDGE
P: 15OCT2021 138075 34.0S 55.0E 4.0-5.8 CCCAA So. Indian Ocean
O: 23OCT2021 08:00:47 57.5S 25.6W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION
P: 24OCT2021 138341 58.0S 25.0W 4.0-5.9 AAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 23OCT2021 16:28:41 37.7S 179.7E ML=4.2 EMSC OFF E. COAST OF N. ISLAND, N.Z
P: 28OCT2021 138329 38.0S 178.0E 3.0-4.5 BABAA 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: 23OCT2021 07:55:33 31.4N 115.5W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO
P: 24OCT2021 138200 30.9N 114.6W 2.5-4.8 AAAAA So. California
O: 23OCT2021 11:27:14 32.0N 117.6W ML=2.8 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 25OCT2021 138202 32.0N 117.4W 2.5-4.8 AAAAA So. California
O: 24OCT2021 06:49:11 33.0N 115.9W ML=3.2 EMSC SOUTHERN CALIFORNIA
O: 24OCT2021 06:49:11 33.0N 115.9W ML=3.6 ANSS SOUTHERN CALIFORNIA
O: 23OCT2021 16:12:50 33.2N 116.0W ML=2.5 EMSC SOUTHERN CALIFORNIA
O: 23OCT2021 13:22:33 32.9N 115.5W Ml=2.3 EMSC SOUTHERN CALIFORNIA
P: 23OCT2021 138201 33.3N 115.8W 2.5-4.8 AAAAA So. California
P: 26OCT2021 138201 32.9N 115.6W 2.5-4.8 BAAAA 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 in Imperial, El Centro, Calexico, Mexicali.
O: 23OCT2021 21:24:47 34.1N 117.3W Ml=2.0 EMSC GREATER LOS ANGELES AREA, CALI
P: 25OCT2021 138203 33.7N 117.5W 2.5-4.5 AAAAA So. California
P: 28OCT2021 138203 34.1N 117.4W 2.5-4.6 BAAAA So. California
O: 23OCT2021 16:28:35 37.0N 121.6W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 25OCT2021 138172 37.1N 121.5W 2.5-4.6 AAAAA Central California
O: 23OCT2021 12:30:17 37.6N 118.7W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 25OCT2021 138167 37.8N 118.2W 2.5-4.7 AAAAA California/Nevada area
P: 27OCT2021 138165 37.4N 118.6W 2.5-4.6 CAAAA California/Nevada area
O: 23OCT2021 15:36:45 38.0N 122.3W Md=2.1 EMSC SAN FRANCISCO BAY AREA, CALIF.
O: 23OCT2021 13:34:44 38.0N 122.3W ML=2.5 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 22OCT2021 138175 37.9N 122.0W 2.5-4.6 AAAAA Central California
P: 26OCT2021 138175 38.0N 122.3W 2.5-4.6 BAAAA Central California
NEIC reported this earthquake of M 2.8 in San Francisco Bay, California was felt with intensity II-III in the area(s) of San Francisco Bay, California at Hercules, Pinole, Rodeo, El Sobrante, Crockett, Marginez, Richmond, San Pablo, El Cerrito, Berkeley.
O: 23OCT2021 21:12:54 38.2N 117.9W ml=2.5 EMSC NEVADA
P: 25OCT2021 138167 37.8N 118.2W 2.5-4.7 AAAAA California/Nevada area
O: 23OCT2021 21:46:28 39.6N 120.3W ML=3.2 EMSC NORTHERN CALIFORNIA
P: 22OCT2021 138169 39.3N 120.0W 2.5-4.6 AAAAA California/Nevada area
NEIC reported this earthquake of M 3.3 in Loyalton, northern California was felt with intensity II-III in the area(s) of Loyalton, northern California at Sierraville, Loyalton, Truckee, Chicoot, Norden, Nevada City, Foresthill, Grass Valley and in Reno, Nevada.
O: 24OCT2021 03:53:39 38.8N 122.9W Md=2.8 EMSC NORTHERN CALIFORNIA
O: 24OCT2021 04:09:22 38.8N 122.9W Md=2.6 EMSC NORTHERN CALIFORNIA
O: 24OCT2021 02:57:36 38.8N 122.9W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 22OCT2021 138176 38.7N 122.7W 2.5-4.4 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 Hopland and Guerneville.
ALASKA
O: 23OCT2021 23:02:31 56.3N 156.5W ML=3.5 EMSC ALASKA PENINSULA
P: 24OCT2021 138264 57.0N 156.6W 3.5-4.9 AAAAA Alaska Peninsula
O: 24OCT2021 05:33:51 59.7N 153.0W ML=3.3 EMSC SOUTHERN ALASKA
P: 25OCT2021 138282 60.2N 153.2W 3.2-5.3 AAAAA Central Alaska
O: 24OCT2021 03:51:42 64.4N 146.7W ML=3.5 EMSC CENTRAL ALASKA
P: 27OCT2021 138285 63.2N 145.5W 3.2-5.3 BBAAA Central Alaska
NEIC reported this earthquake of M 3.3 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Eielson AFB, North Pole and Delta Junction.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 23OCT2021 09:10:58 42.3N 126.2W ML=3.2 EMSC OFF COAST OF OREGON
O: 23OCT2021 15:59:37 42.2N 126.6W ML=3.1 EMSC OFF COAST OF OREGON
P: 23OCT2021 138244 43.1N 126.5W 3.0-4.4 AAAAA Off Coast of Oregon
NEIC reported this earthquake of M 3.2 off the coast of Oregon was felt with intensity II-III in the area(s) of Oregon at Gold Beach, Eugene, Corvallis.
ROCKY MOUNTAINS REGION
O: 23OCT2021 08:00:22 31.6N 104.4W ML=2.6 EMSC WESTERN TEXAS
P: 24OCT2021 138199 32.6N 104.6W 2.0-3.9 AAAAA SW U.S.A
O: 24OCT2021 03:37:05 47.9N 114.0W Ml=2.7 EMSC WESTERN MONTANA
P: 17OCT2021 137984 48.0N 115.0W 2.0-3.9 CAAAA Montana/Idaho
NEIC reported this earthquake of M 2.5 in Western Montana was felt with intensity II-III in the area(s) of Western Montana at Bigfork and Polson.
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
O: 23OCT2021 15:23:51 19.4N 155.5W ML=3.4 EMSC ISLAND OF HAWAII, HAWAII
P: 23OCT2021 138128 18.8N 155.2W 3.0-4.8 AAAAA Hawaii
NEIC reported this earthquake of M 3.2 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Captain Cook, Hilo, Naalehu, Holualoa and Kailua Kona.
UNUSUAL QUAKE IN MICRONESIA LIKELY TIDALLY TRIGGERED
EARTHQUAKE SUMMARY FOR OCTOBER 22, 2021
An unusual earthquake of M 5.4 in Micronesia was the largest earthquake in the world today. NEIC reported light intensity in Micronesia at Polowat and Chuuk.
The last earthquake within about 400 km of this epicenter of M>=5.4 was an M 5.6 on November 11, 2015 but no such earthquakes have hit within about 200 km in at least 30 years. This epicenter is located near the longitude of maximum tidal stress with the recent full moon as noted in previous issues of this summary:
"The full moon arrived on October 20 at 14:57 UT. Longitudes which were sub-solar (local solar noon) at this time are near 45 West while those which are anti-solar (local solar mid-night) are near 135 East. In the west these include areas of the northern Mid-Atlantic and the Caribbean while in the east most of the subduction zone from eastern Indonesia north to Japan and the Kuril Islands are included. These are the longitudes where enhanced seismicity with this full moon are most likely. A geomagnetic storm is likely to favor seismicity in the region of Indonesia and at higher latitudes with major events most likely around local solar noon and midnight. The likelihood of a major earthquake in the next week (October 18-24, 2021), as estimated by this summary, is moderate." (October 20-23, 2021)
O: 22OCT2021 07:27:53 4.4N 147.2E Mw=5.4 EMSC FED. STATES OF MICRONESIA REGI
A moderate earthquake of M 5.1-5.3 was also widely felt in Taiwan today.
NEIC reported this earthquake of M 5.1 in Taiwan was felt with intensity II-III in the area(s) of Taiwan in Ilan, Taichung, Taipei, Tainan, and IV in Hualien, and Nantou. CWB reported this earthquake was felt with intensity IV in Hualien, III in Yilan, Nantou, Taichung; II in Hsinchu, Yunlin, Chiayi, I in Taoyuan, Taipei, Taitung, Changhua and Tainan Counties, Taiwan. This earthquake, like that in Micronesia was likely triggered by high tidal stresses associated with the full moon. It occurred within about one hour of local solar noon, a time when tidal stresses maximize. Further seismic enhancement is likely in Taiwan in the next several days. Forecast 138157 had expected this event within about 100 km was likely around October 25.
O: 23OCT2021 03:16:03 24.1N 121.8E mb=5.1 EMSC TAIWAN
O: 23OCT2021 03:16:04 24.1N 121.7E ML=5.3 TAI Hualien, Taiwan
P: 25OCT2021 138157 23.0N 122.0E 4.0-5.4 AAAAA Taiwan
The strongest earthquake in the U.S. or Canada today was an M 5.1 in the Rat Islands, Aleutians, Alaska. NEIC reported it was felt with intensity II in Adak, Alaska. The last earthquake in the Rat Islands within about 150 km of this epicenter occurred on July 11, 2021 with M 5.3 and 5.1. The only other such event in the Rat Islands in the past two years occurred on May 17, 2021 with M 5.4. Forecast 138274 had expected today's event with in about 50 km was likely around October 27.
O: 23OCT2021 03:10:03 51.6N 178.8E mb=5.1 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 27OCT2021 138274 51.0N 179.0E 4.0-5.6 BAAAA Rat Islands
The strongest earthquake felt outside Alaska in the U.S. today was an M 3.5-3.7 off the coast of Baja California. NEIC reported this earthquake of M 3.6 off the coast of Baja California was felt with intensity II-III in the area(s) of California in Imperial Beach, Coronado, San Diego, La Mesa, La Jolla. This is the strongest earthquake within about 100 km of this epicenter since an M 4.2 more than two years ago on June 5, 2019. Forecast 138202 had expected this activity was likely within about 50 km around October 25.
O: 23OCT2021 02:56:32 31.9N 117.9W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
O: 23OCT2021 02:56:32 31.9N 117.9W ML=3.7 ANSS OFFSHORE BAJA CALIFORNIA, MEXI
P: 25OCT2021 138202 32.0N 117.4W 2.5-4.8 AAAAA So. California
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: 23OCT2021 03:16:03 24.1N 121.8E mb=5.1 EMSC TAIWAN
O: 23OCT2021 03:16:04 24.1N 121.7E ML=5.3 TAI Hualien, Taiwan
P: 25OCT2021 138157 23.0N 122.0E 4.0-5.4 ABAAA Taiwan
O: 22OCT2021 20:58:09 29.1N 67.6E mb=4.2 EMSC PAKISTAN
P: 19OCT2021 137908 30.0N 68.0E 3.8-5.8 BAAAA Hindu Kush/Pakistan
O: 22OCT2021 23:03:13 51.4N 90.7E Mw=5.1 EMSC SOUTHWESTERN SIBERIA, RUSSIA
P: 14OCT2021 137981 46.0N 96.0E 4.0-5.6 CCCAA Mongolia
NEIC reported this earthquake of M 5.1 in Siberia, Russia was felt with intensity II-III in the area(s) of Siberia, Russia at Kyzyl-Mazhalyk.
INDONESIA AND PHILIPPINES
O: 22OCT2021 17:01:13 2.3S 100.8E mb=4.3 EMSC KEP. MENTAWAI REGION, INDONESI
P: 27OCT2021 138114 2.0S 101.0E 4.0-5.5 BAAAA So. of Sumatera
O: 22OCT2021 20:51:43 4.1S 136.4E ML=4.0 EMSC NEAR S COAST OF PAPUA, INDONES
P: 29OCT2021 138117 4.0S 136.0E 4.0-5.6 CAAAA West Irian, PNG
O: 22OCT2021 07:27:53 4.4N 147.2E Mw=5.4 EMSC FED. STATES OF MICRONESIA REGI
O: 23OCT2021 01:16:13 9.5S 118.5E ML=4.3 EMSC SUMBAWA REGION, INDONESIA
P: 26OCT2021 138304 11.0S 118.0E 4.0-5.6 BBAAA So. of Indonesia
O: 22OCT2021 19:44:49 13.7N 123.1E ML=4.2 EMSC LUZON, PHILIPPINES
P: 24OCT2021 138131 14.0N 121.0E 3.5-5.0 AABAA Luzon, Philippines
O: 22OCT2021 17:52:51 18.1N 145.4E mb=4.3 EMSC PAGAN REG., N. MARIANA ISLANDS
P: 13OCT2021 137892 20.0N 146.0E 4.0-5.4 CBAAA Volcano Islands
CENTRAL AND SOUTH AMERICA
O: 22OCT2021 18:06:25 11.1S 74.7W ML=4.2 EMSC CENTRAL PERU
P: 27OCT2021 138297 11.0S 74.0W 4.0-5.9 BAAAA Central Peru
O: 23OCT2021 04:20:41 15.7S 72.0W ML=4.0 EMSC SOUTHERN PERU
P: 26OCT2021 138297 14.0S 73.0W 4.0-5.5 BBAAA Central Peru
O: 22OCT2021 18:38:59 15.9N 94.9W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 27OCT2021 138124 16.0N 95.0W 3.5-5.2 BAAAA Chiapas, Mexico
O: 22OCT2021 22:20:58 18.3N 67.7W Md=3.2 EMSC MONA PASSAGE, PUERTO RICO
P: 22OCT2021 138139 18.0N 68.0W 3.4-5.1 AAAAA Puerto Rico
NEIC reported this earthquake of M 3.7 north of Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico in Toa Baja and Morovis.
O: 22OCT2021 20:39:42 18.3N 72.0W ML=3.0 EMSC HAITI REGION
O: 22OCT2021 17:14:15 18.8N 74.0W ML=3.6 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 CAAAA Haiti
O: 22OCT2021 11:14:50 22.2S 69.1W mb=4.4 EMSC ANTOFAGASTA, CHILE
P: 19OCT2021 138060 23.0S 69.0W 4.0-5.4 BAAAA Coast No. Chile
NEIC reported this earthquake of M 4.4 in Calama, Antofagasta, Chile was felt with intensity II-III in the area(s) of Calama, Antofagasta, Chile.
O: 23OCT2021 02:13:56 33.2S 71.7W mb=5.0 EMSC VALPARAISO, CHILE
P: 24OCT2021 138326 33.0S 71.0W 4.0-5.9 AAAAA Central Chile
NEIC reported this earthquake of M 5.0 in Valparaiso, Chile was felt with intensity II-III in the area(s) of Valparaiso, Chile with VI in Valparaiso and Quilpue; V in Vina del Mar, IV in San Antonio, La Ligua and II-III in Villa Alemana, Calera, Lampa, Penaflor and San Bernardo.
O: 23OCT2021 01:45:27 36.9S 72.8W mb=4.7 EMSC BIO-BIO, CHILE
P: 29OCT2021 138327 37.0S 74.0W 4.0-5.6 CAAAA Central Chile
NEIC reported this earthquake of M 4.7 in Biobio, Chile was felt with intensity II-III in the area(s) of Biobio, Chile with VI in Concepcion, Talcahuano, Los Angeles, Chillan, Angol, Araucania; III in Chiguayante, Penco, Coronel, Arauco, and Curanilahue.
AFRICA AND EUROPE
O: 23OCT2021 06:07:00 28.6N 17.8W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
O: 23OCT2021 00:22:27 28.3N 17.5W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
P: 23OCT2021 138144 28.0N 18.0W 3.5-4.9 AAAAA Canary Islands
O: 22OCT2021 17:12:50 35.2N 25.3E mb=4.3 EMSC CRETE, GREECE
O: 22OCT2021 10:11:31 35.1N 25.2E ML=4.4 EMSC CRETE, GREECE
P: 24OCT2021 138160 35.0N 25.0E 3.0-4.6 AAAAA Aegean Sea
NEIC reported this earthquake of M 4.3 and M 4.5 in Crete, Greece was felt with intensity II-III in the area(s) of Crete, Greece with V in Anoyia and Arkalokhorion; IV in Glavinica, Bulgaria and Nea Alikarnassos, Greece and II-III in Koutouloufarion and Khanion tou, Limin and Gazion, Iraklion.
O: 23OCT2021 01:17:19 38.8N 20.6E mb=4.1 EMSC GREECE
P: 24OCT2021 138190 38.0N 20.0E 3.0-4.5 AAAAA No. Greece
NEIC reported this earthquake of M 4.1 in Levkas, Greece was felt with intensity II-III in the area(s) of Levkas, Greece at Karia, Leukas and Nidrion.
SOUTHWEST PACIFIC
O: 22OCT2021 21:59:48 16.9S 174.1W mb=5.0 EMSC TONGA
P: 23OCT2021 138306 16.0S 174.0W 4.0-5.4 AAAAA Tonga Islands
O: 22OCT2021 08:28:53 26.0S 178.5E mb=4.3 EMSC SOUTH OF FIJI ISLANDS
P: 26OCT2021 138325 25.0S 179.0E 4.0-5.5 BAAAA Tonga/Fiji
O: 22OCT2021 14:21:02 18.8S 177.6W mb=4.5 EMSC FIJI REGION
P: 24OCT2021 138308 19.0S 176.0W 4.0-5.6 AABAA Tonga Islands
OCEAN RIDGES
O: 23OCT2021 00:34:17 56.3S 27.9W Mw=5.2 EMSC SOUTH SANDWICH ISLANDS REGION
P: 25OCT2021 138341 55.0S 29.0W 4.0-5.9 ABAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 22OCT2021 15:43:26 31.8S 179.1E ML=4.1 EMSC KERMADEC ISLANDS REGION
P: 27OCT2021 138333 31.0S 180.0E 4.0-5.4 BAAAA So. Kermadec Islands
O: 23OCT2021 06:51:53 35.1S 179.7E ML=4.2 EMSC OFF E. COAST OF N. ISLAND, N.Z
P: 24OCT2021 138333 33.0S 178.0E 4.0-5.6 ACBAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 23OCT2021 06:50:30 35.5N 138.9E ML=4.0 EMSC EASTERN HONSHU, JAPAN
P: 26OCT2021 138191 35.0N 139.0E 3.5-5.0 BAAAA No. Honshu, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 22OCT2021 09:42:53 29.5N 116.3W ML=3.8 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 17OCT2021 137929 31.9N 116.3W 2.5-4.7 BCAAA So. California
O: 22OCT2021 09:56:02 29.8N 113.9W ML=3.7 EMSC GULF OF CALIFORNIA
P: 24OCT2021 138200 30.9N 114.6W 2.5-4.8 ABAAA So. California
O: 23OCT2021 02:56:32 31.9N 117.9W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 25OCT2021 138202 32.0N 117.4W 2.5-4.8 AAAAA So. California
O: 23OCT2021 06:54:53 36.5N 118.0W Ml=2.1 EMSC CENTRAL CALIFORNIA
P: 23OCT2021 138164 36.9N 117.4W 2.5-4.7 AAAAA California/Nevada area
O: 22OCT2021 21:14:19 37.6N 118.8W ML=3.1 EMSC CENTRAL CALIFORNIA
O: 22OCT2021 21:14:19 37.6N 118.8W ML=3.5 ANSS CENTRAL CALIFORNIA
P: 24OCT2021 138165 37.3N 118.3W 2.5-4.6 AAAAA California/Nevada area
P: 27OCT2021 138165 37.4N 118.6W 2.5-4.6 BAAAA California/Nevada area
NEIC reported this earthquake of M 3.5 in Mammoth Lakes, California was felt with intensity II-III in the area(s) of Mammoth Lakes, California at Benton and Bishop.
O: 22OCT2021 14:52:56 38.0N 122.3W Md=2.1 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 22OCT2021 138175 37.9N 122.0W 2.5-4.6 AAAAA Central California
O: 22OCT2021 13:55:27 38.5N 119.4W ml=2.4 EMSC CENTRAL CALIFORNIA
P: 24OCT2021 138168 38.5N 119.6W 2.5-4.4 AAAAA California/Nevada area
O: 23OCT2021 04:26:26 38.9N 122.7W ML=2.7 EMSC NORTHERN CALIFORNIA
O: 23OCT2021 04:28:00 38.8N 122.8W Md=2.7 EMSC NORTHERN CALIFORNIA
P: 22OCT2021 138176 38.7N 122.7W 2.5-4.4 AAAAA Central California
NEIC reported these earthquakes of M 3.2 and 2.9 in the Geysers, California was felt with intensity II-III in the area(s) of the Geysers, California in Geyserville, Cloverdale, Healdsburg, Cotati and V in Kelseyville.
ALASKA
O: 23OCT2021 03:10:03 51.6N 178.8E mb=5.1 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 27OCT2021 138274 51.0N 179.0E 4.0-5.6 BAAAA Rat Islands
O: 23OCT2021 01:52:40 69.1N 144.6W ML=3.2 EMSC NORTHERN ALASKA
P: 26OCT2021 138290 69.0N 144.0W 2.5-4.0 BAAAA Northern 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: 22OCT2021 23:55:22 31.7N 104.4W ML=3.5 EMSC WESTERN TEXAS
P: 24OCT2021 138199 32.6N 104.6W 2.0-3.9 AAAAA SW U.S.A
O: 22OCT2021 11:29:38 39.5N 112.0W ML=3.4 EMSC UTAH
O: 22OCT2021 15:24:36 39.4N 112.0W Ml=2.1 EMSC UTAH
P: 25OCT2021 138217 38.7N 112.6W 2.0-4.1 BAAAA Utah area
NEIC reported this earthquake of M 3.2 in Utah was felt with intensity II-III in the area(s) of Utah at Nephi, Centerfield, Santaquin, Provo, Todele and West Jordan.
O: 22OCT2021 11:00:48 44.5N 115.2W Ml=2.7 EMSC SOUTHERN IDAHO
O: 22OCT2021 17:06:37 44.3N 115.0W Ml=2.2 EMSC SOUTHERN IDAHO
P: 24OCT2021 138234 44.4N 115.4W 2.0-4.0 AAAAA Montana/Idaho
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
No earthquakes of M>=3 were located in Hawaii.
MODERATE QUAKE SHAKES NORTH ISLAND, NEW ZEALAND
EARTHQUAKE SUMMARY FOR OCTOBER 21, 2021
The strongest earthquake felt in the world today was an M 5.6-5.9 under North Island, New Zealand. NEIC reported it was felt with intensity IV in North Island at Taumaraunui, Manawatu-Wanganui, Taupo, Wakato, Palmerston North, and II-III in Ohura, Te Kuiti, Wanganui, Tokoroa, Hastings, Kapiti, Wellington and Pukekohe. GEONET reported this earthquake was felt with moderate intensity east of Stratford and in southwestern North Island and northern South Island. Light to moderate intensity was reported throughout much of southern North Island and northern South Island. More than 24738 people reported feeling this earthquake with 9670 reporting weak shaking; 11956 light; 2824 moderate and 243 strong intensity; 21 severe and 24 extreme shaking. The last earthquake under North Island with M>=5.9 within about 200 km of today's epicenter occurred on October 30, 2018 with M 6.1 and prior to that on December 7, 2012 with M 6.3. Forecast 138074 had expected today's activity within about 15 km of the epicenter was likely in mid-October.
O: 21OCT2021 21:58:19 39.0S 174.9E MS=5.9 GEONET North Island, New Zealand
O: 21OCT2021 21:58:18 39.1S 175.0E Mw=5.6 EMSC NORTH ISLAND OF NEW ZEALAND
P: 16OCT2021 138074 39.0S 175.0E 3.0-4.4 BAAAA North Island, N.Z.
A series of moderate earthquakes continued today in the eruption of Cumbre Viejo, La Palma, Canary Islands and in the aftershock zone in Crete, Greece. The activity in the Canary Islands accompanied a major continuing eruption of the volcano with which shut down air traffic today amid continuing ash and lava flows. Forecast 138144 had expected this enhanced activity around October 23.
O: 22OCT2021 06:54:49 28.6N 17.8W ML=4.2 EMSC CANARY ISLANDS, SPAIN REGION
O: 21OCT2021 22:54:03 28.6N 17.8W ML=4.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 23OCT2021 138144 28.0N 18.0W 3.5-4.9 AAAAA Canary Islands
Earthquakes of M 4.3 and 4.5-4.6 were widely felt in the area of Crete, Greece today. These are the strongest aftershocks to date of the M 6.4 about 100 km to the east of these epicenter of October 12, 2021. Forecasts 137906 and 138160 had expected this activity was likely within about 100 km around October 19-24. The strongest of these, the M 4.5, occurred within minutes of local solar noon, and was probably promoted by high tidal stresses which maximize near this hour.
NEIC reported the earthquake of M 4.5-4.6 in Crete, Greece was felt with intensity II-III in the area(s) of Epano and Nea Alikarnassos and V in Arkalokhorion, Iraklion.
O: 21OCT2021 09:38:42 35.1N 25.3E ML=4.5 EMSC CRETE, GREECE
O: 21OCT2021 09:38:42 35.1N 25.3E ML=4.6 ANSS CRETE, GREECE
P: 19OCT2021 137906 34.0N 24.0E 3.0-4.7 ABAAA Crete
O: 21OCT2021 08:12:58 35.2N 25.3E ML=4.3 EMSC CRETE, GREECE
P: 24OCT2021 138160 35.0N 25.0E 3.0-4.6 BAAAA Aegean Sea
A strong earthquake also occurred as an M 6.0 in Fiji. It was not reported felt in this remote area. The last earthquake of M>=6 in Fiji within about 150 km of this epicenter occurred on September 16, 2018 with M 6.5 abou 150 km to the southwest and an M 6.1 on June 17, 2017 about 100 km to the north. All the events in this region of magnitudes greater than 6.0 in the past 30 years have occurred at deep focal depths of 450-700 km and are unlikely to trigger tsunamis or local damage. Forecasts 138068 and 138069 had expected today's event was likely to the north around October 19.
O: 21OCT2021 08:10:43 25.2S 179.6E mw=6.0 ANSS Fiji
O: 21OCT2021 08:10:44 25.3S 179.7E Mw=6.0 EMSC SOUTH OF FIJI ISLANDS
P: 19OCT2021 138068 22.0S 179.0W 4.0-5.6 ACAAA Tonga Islands
P: 19OCT2021 138069 23.0S 179.0E 4.0-5.4 ACAAA Tonga/Fiji
A moderately strong earthquake also occurred as an M 5.5 in the Izu Islands, Japan. NEIC reported this earthquake was felt with maximum intensity IV in Japan in Kanagawa and II-III in Shizuoka, Tokyo, and Saitama. A moderate geomagnetic disturbance with maximum Kp 4 coincident with this and the earthquake in Tonga and may have helped trigger them. This earthquake follows the eruption of the volcano Mount Aso in southwestern Japan. This eruption blew ash up to 3500 meters and a lava flow accompanied the eruption, the first since October 2016. It also occurred near local solar noon and was probably promoted by high tidal stresses associated with the full moon today as it was located at 138 East longitude near the longitude of maximum tidal stress with this alignment (at 135 E). This summary had noted this possibility in previous issues as:
"The full moon arrives on October 20 at 14:57 UT. Longitudes which are sub-solar (local solar noon) at this time are near 45 West while those which are anti-solar (local solar mid-night) are near 135 East. In the west these include areas of the northern Mid-Atlantic and the Caribbean while in the east most of the subduction zone from eastern Indonesia north to Japan and the Kuril Islands are included. These are the longitudes where enhanced seismicity with this full moon are most likely. A geomagnetic storm is likely to favor seismicity in the region of Indonesia and at higher latitudes with major events most likely around local solar noon and midnight. The likelihood of a major earthquake in the next week (October 18-24, 2021), as estimated by this summary, is moderate." (October 18-20, 2021)
This is the strongest earthquake within about 200 km of today's epicenter since an M 5.6 on July 6, 2020. The last of significantly larger magnitude was an M 6.3 on July 27, 2019. All of these events occurred between 325 and 500 km depth and caused little damage on the surface. Forecasts 137925 and 137904 had expected today's activity in mid-October around October 17-18. This earthquake is located at 105 degrees from the M 7.2 Guerrero Mexico quake of September 8 and may have been promoted by energy from this source.
O: 21OCT2021 08:36:47 32.1N 138.2E Mw=5.5 EMSC IZU ISLANDS, JAPAN REGION
P: 17OCT2021 137904 30.0N 139.0E 3.5-5.1 BCAAA Central/So. Honshu Japan
P: 18OCT2021 137925 31.0N 141.0E 4.0-5.5 BBBAA Off East Coast Honshu
The strongest earthquake in the U.S. or Canada today was an M 4.7 South of Alaska. The last earthquake of M>=4.7 in the area south of Alaska within about 150 km of this epicenter occurred with the mainshock in the Alaska Peninsula of
M 8.2 on July 30, 2021. A strong M 6.9 aftershock about 200 km to the northwest of today's event in the Alaska Peninsula was felt in the area on October 11, 2021. Forecast 138011 had expected today's event in this area in mid-October.
O: 21OCT2021 08:24:40 55.5N 154.8W mb=4.7 EMSC SOUTH OF ALASKA
P: 15OCT2021 138011 54.7N 155.9W 3.5-4.9 CAAAA Alaska Peninsula
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: 21OCT2021 17:46:04 38.2N 72.7E mb=4.2 EMSC TAJIKISTAN
P: 28OCT2021 138182 38.0N 72.0E 3.8-5.4 CAAAA Hindu Kush/Pakistan
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 21OCT2021 13:39:25 3.2S 140.1E ML=4.0 EMSC PAPUA, INDONESIA
P: 19OCT2021 137847 2.0S 139.0E 4.0-5.4 ABAAA West Irian, PNG
O: 21OCT2021 19:34:36 6.0S 122.6E mb=4.4 EMSC FLORES SEA
P: 24OCT2021 138099 7.0S 125.0E 4.0-5.4 BACAA Banda Sea
O: 22OCT2021 00:29:09 6.7S 104.4E ML=4.0 EMSC SUNDA STRAIT, INDONESIA
P: 17OCT2021 137842 6.0S 104.0E 4.0-5.4 BAAAA So. of Sumatera
O: 22OCT2021 02:39:16 9.2S 110.4E mb=4.6 EMSC SOUTH OF JAVA, INDONESIA
P: 16OCT2021 137840 9.0S 111.0E 4.0-5.4 CAAAA So. of Java
NEIC reported the earthquake of M 4.6 in Java, Indonesia was felt with intensity II-III in the area(s) of Java, Indonesia in Prambanan and Jetis, Indonesia.
NEIC reported an earthquake of M 5.3 in Java was felt with intensity II-III in the area(s) of Java at Malang, Pasuruan, Surabaya, and IV in Blitar.
O: 22OCT2021 05:19:50 14.5N 123.4E mb=4.5 EMSC LUZON, PHILIPPINES
P: 14OCT2021 137861 14.0N 122.0E 3.5-5.1 CAAAA Luzon, Philippines
NEIC reported this earthquake of M 4.5 in Bicol, Philippines was felt with intensity II-III in the area(s) of Bicol, Philippines at Daet, Garchitorena and Barcelonita.
O: 21OCT2021 18:00:18 20.1N 121.8E ML=3.9 EMSC BATAN ISL REGION, PHILIPPINES
P: 23OCT2021 138156 20.0N 121.0E 4.0-5.4 AAAAA Taiwan
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 21OCT2021 12:55:44 14.8N 94.3W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO
O: 21OCT2021 13:08:19 15.2N 93.9W mb=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
P: 17OCT2021 137854 14.0N 93.0W 3.5-5.3 BAAAA Chiapas, Mexico
O: 22OCT2021 06:30:56 15.4N 95.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 17OCT2021 137870 15.0N 96.0W 3.5-5.6 BAAAA Oaxaca, Mexico
O: 21OCT2021 09:21:10 16.1N 99.3W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 20OCT2021 137871 16.0N 100.0W 3.5-5.3 AAAAA Oaxaca, Mexico
O: 21OCT2021 20:22:10 16.2N 93.7W mb=4.4 EMSC CHIAPAS, MEXICO
P: 26OCT2021 138124 16.0N 93.0W 3.5-5.1 BAAAA Chiapas, Mexico
O: 21OCT2021 13:37:00 16.7N 99.7W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
O: 22OCT2021 04:37:19 16.9N 99.7W ML=4.0 EMSC GUERRERO, MEXICO
P: 20OCT2021 137871 16.0N 100.0W 3.5-5.3 AAAAA Oaxaca, Mexico
O: 21OCT2021 21:47:07 17.4N 92.1W ML=4.0 EMSC CHIAPAS, MEXICO
P: 23OCT2021 138124 15.0N 92.0W 3.5-5.4 ACAAA Chiapas, Mexico
O: 21OCT2021 22:28:46 18.7N 74.1W ML=3.5 EMSC HAITI REGION
O: 21OCT2021 20:45:23 18.9N 74.0W ML=3.4 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 CAAAA Haiti
AFRICA AND EUROPE
O: 22OCT2021 06:54:49 28.6N 17.8W ML=4.2 EMSC CANARY ISLANDS, SPAIN REGION
O: 21OCT2021 22:54:03 28.6N 17.8W ML=4.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 23OCT2021 138144 28.0N 18.0W 3.5-4.9 AAAAA Canary Islands
O: 21OCT2021 09:38:42 35.1N 25.3E ML=4.5 EMSC CRETE, GREECE
P: 19OCT2021 137906 34.0N 24.0E 3.0-4.7 ABAAA Crete
O: 21OCT2021 08:12:58 35.2N 25.3E ML=4.3 EMSC CRETE, GREECE
P: 24OCT2021 138160 35.0N 25.0E 3.0-4.6 BAAAA Aegean Sea
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 21OCT2021 08:10:44 25.3S 179.7E Mw=6.0 EMSC SOUTH OF FIJI ISLANDS
P: 26OCT2021 138325 25.0S 179.0E 4.0-5.5 BAAAA Tonga/Fiji
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 21OCT2021 21:58:18 39.1S 175.0E Mw=5.6 EMSC NORTH ISLAND OF NEW ZEALAND
P: 16OCT2021 138074 39.0S 175.0E 3.0-4.4 BAAAA North Island, N.Z.
O: 21OCT2021 08:12:01 32.6S 178.7E ML=4.7 EMSC SOUTH OF KERMADEC ISLANDS
P: 18OCT2021 138076 32.0S 179.0E 4.0-5.5 BAAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 21OCT2021 08:36:47 32.1N 138.2E Mw=5.5 EMSC IZU ISLANDS, JAPAN REGION
P: 26OCT2021 138178 33.0N 138.0E 3.5-5.2 BAAAA Central/So. Honshu Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 21OCT2021 21:47:04 30.7N 114.3W ML=3.5 EMSC GULF OF CALIFORNIA
O: 21OCT2021 17:11:16 30.8N 114.3W ML=3.5 EMSC GULF OF CALIFORNIA
O: 21OCT2021 19:31:52 30.8N 114.3W ML=3.6 EMSC GULF OF CALIFORNIA
O: 21OCT2021 15:57:01 31.1N 114.8W ML=3.7 EMSC GULF OF CALIFORNIA
O: 21OCT2021 07:38:52 31.2N 115.4W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
O: 21OCT2021 07:20:29 31.3N 114.4W ML=3.5 EMSC GULF OF CALIFORNIA
O: 21OCT2021 15:39:23 31.4N 115.6W ML=3.0 EMSC BAJA CALIFORNIA, MEXICO
P: 24OCT2021 138200 30.9N 114.6W 2.5-4.8 BAAAA So. California
O: 21OCT2021 15:41:36 32.4N 115.4W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO
P: 17OCT2021 137931 32.0N 116.3W 2.5-4.7 BAAAA So. California
O: 21OCT2021 17:22:23 33.6N 116.7W Ml=2.4 EMSC SOUTHERN CALIFORNIA
P: 14OCT2021 137935 33.9N 116.9W 2.5-4.4 CAAAA So. California
O: 21OCT2021 13:58:03 34.0N 118.4W Ml=2.4 EMSC GREATER LOS ANGELES AREA, CALI
P: 19OCT2021 137938 34.0N 118.7W 2.5-4.5 AAAAA So. California
O: 21OCT2021 22:51:44 36.0N 119.8W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 17OCT2021 137898 36.1N 120.1W 2.5-4.8 BAAAA Central California
P: 22OCT2021 138171 36.1N 120.1W 2.5-4.5 AAAAA Central California
O: 21OCT2021 22:07:54 36.5N 121.0W Md=2.0 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137898 36.2N 120.8W 2.5-4.8 AAAAA Central California
O: 21OCT2021 22:35:35 37.2N 119.3W ML=2.6 EMSC CENTRAL CALIFORNIA
P: 24OCT2021 138165 37.3N 118.3W 2.5-4.6 BAAAA California/Nevada area
O: 22OCT2021 02:30:17 37.6N 118.7W ML=2.9 EMSC CENTRAL CALIFORNIA
P: 24OCT2021 138165 37.3N 118.3W 2.5-4.6 AAAAA California/Nevada area
NEIC reported these earthquakes of M 2.8 and 3.4 in Central California were felt with intensity II-III in the area(s) of Central California in Mammoth Lakes, Bishop, June Lake, Shaver Lake (IV).
O: 21OCT2021 13:10:50 40.3N 125.0W ML=2.8 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 23OCT2021 138244 40.6N 124.9W 2.5-4.7 AAAAA Off Coast of No. Calif
ALASKA
O: 21OCT2021 08:24:40 55.5N 154.8W mb=4.7 EMSC SOUTH OF ALASKA
P: 15OCT2021 138011 54.7N 155.9W 3.5-4.9 CAAAA Alaska Peninsula
O: 21OCT2021 16:57:39 57.1N 146.5W ML=3.5 EMSC GULF OF ALASKA
P: 24OCT2021 138281 60.1N 147.1W 3.2-5.4 BBAAA Central Alaska
O: 21OCT2021 08:42:27 60.0N 153.4W ML=3.2 EMSC SOUTHERN ALASKA
P: 25OCT2021 138282 60.2N 153.2W 3.2-5.3 BAAAA Central Alaska
O: 22OCT2021 02:39:45 60.3N 150.2W ML=3.6 EMSC KENAI PENINSULA, ALASKA
P: 24OCT2021 138281 60.1N 147.1W 3.2-5.4 AABAA Central Alaska
NEIC reported this earthquake of M 3.4 in Kenai, Alaska was felt with intensity II-III in the area(s) of Kenai, Alaska at Cooper Landing, Sterling, Seldotna, Kenai, Kasilof, Seward and Anchorage.
O: 21OCT2021 18:44:34 63.0N 148.3W mb=4.4 EMSC CENTRAL ALASKA
P: 22OCT2021 138284 62.7N 150.6W 3.2-5.3 AAAAA Central Alaska
NEIC reported this earthquake of M 4.4 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Cantwell, Healy, Palmer, Chugiak, Wasilla, Fairbanks, Fort Richardson, Eagle River and Anchorage.
O: 21OCT2021 23:31:58 63.1N 150.9W ML=3.1 EMSC CENTRAL ALASKA
P: 22OCT2021 138284 62.7N 150.6W 3.2-5.3 AAAAA Central Alaska
O: 22OCT2021 00:48:52 69.3N 144.5W ML=3.3 EMSC NORTHERN ALASKA
P: 13OCT2021 138039 69.0N 144.0W 3.0-4.8 CAAAA Northern Alaska
P: 26OCT2021 138290 69.0N 144.0W 2.5-4.0 BAAAA Northern Alaska
O: 21OCT2021 03:31:03 55.4N 131.3W MB=3.2 ECAN Ketchikan, AK
P: 25OCT2021 138265 58.3N 133.5W 3.0-4.9 BCBAA 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
O: 21OCT2021 15:13:36 31.7N 104.4W ML=2.3 EMSC WESTERN TEXAS
O: 21OCT2021 11:31:54 31.7N 104.4W ML=3.2 EMSC WESTERN TEXAS
O: 21OCT2021 15:33:13 31.7N 104.4W ML=3.2 EMSC WESTERN TEXAS
O: 21OCT2021 17:56:08 31.8N 104.6W ML=3.3 EMSC WESTERN TEXAS
P: 24OCT2021 138199 32.6N 104.6W 2.0-3.9 BAAAA SW U.S.A
O: 21OCT2021 11:54:37 39.4N 110.3W MD=2.0 EMSC UTAH
P: 18OCT2021 137905 38.3N 108.9W 2.0-4.0 BBAAA Colorado area
EASTERN U.S./CANADA
O: 21OCT2021 07:25:05 35.2N 96.1W ML=2.0 EMSC OKLAHOMA
P: 23OCT2021 138212 35.0N 96.0W 2.0-4.1 AAAAA Southeast U.S.
HAWAII
O: 22OCT2021 04:34:43 19.2N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII
O: 21OCT2021 17:28:39 19.3N 155.2W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII
P: 17OCT2021 137858 19.4N 155.1W 3.0-4.6 BAAAA Hawaii
NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Volcano.
MODERATE EARTHQUAKE SHAKES SOUTHEASTERN HONSHU, JAPAN
EARTHQUAKE SUMMARY FOR OCTOBER 20, 2021
The strongest earthquake in the world today was an M 6.0 in Fiji. It was not reported felt in this remote area. The last earthquake of M>=6 in Fiji within about 150 km of this epicenter occurred on September 16, 2018 with M 6.5 abou 150 km to the southwest and an M 6.1 on June 17, 2017 about 100 km to the north. All the events in this region of magnitudes greater than 6.0 in the past 30 years have occurred at deep focal depths of 450-700 km and are unlikely to trigger tsunamis or local damage. Forecasts 138068 and 138069 had expected today's event was likely to the north around October 19.
O: 21OCT2021 08:10:43 25.2S 179.6E mw=6.0 ANSS Fiji
O: 21OCT2021 08:10:44 25.3S 179.7E Mw=6.0 EMSC SOUTH OF FIJI ISLANDS
P: 19OCT2021 138068 22.0S 179.0W 4.0-5.6 ACAAA Tonga Islands
P: 19OCT2021 138069 23.0S 179.0E 4.0-5.4 ACAAA Tonga/Fiji
A moderately strong earthquake also occurred as an M 5.5 in the Izu Islands, Japan. NEIC reported this earthquake was felt with maximum intensity IV in Japan in Kanagawa and II-III in Shizuoka, Tokyo, and Saitama. A moderate geomagnetic disturbance with maximum Kp 4 coincident with this and the earthquake in Tonga and may have helped trigger them. This earthquake follows the eruption of the volcano Mount Aso in southwestern Japan. This eruption blew ash up to 3500 meters and a lava flow accompanied the eruption, the first since October 2016. It also occurred near local solar noon and was probably promoted by high tidal stresses associated with the full moon today as it was located at 138 East longitude near the longitude of maximum tidal stress with this alignment (at 135 E). This summary had noted this possibility in previous issues as:
"The full moon arrives on October 20 at 14:57 UT. Longitudes which are sub-solar (local solar noon) at this time are near 45 West while those which are anti-solar (local solar mid-night) are near 135 East. In the west these include areas of the northern Mid-Atlantic and the Caribbean while in the east most of the subduction zone from eastern Indonesia north to Japan and the Kuril Islands are included. These are the longitudes where enhanced seismicity with this full moon are most likely. A geomagnetic storm is likely to favor seismicity in the region of Indonesia and at higher latitudes with major events most likely around local solar noon and midnight. The likelihood of a major earthquake in the next week (October 18-24, 2021), as estimated by this summary, is moderate." (October 18-20, 2021)
This is the strongest earthquake within about 200 km of today's epicenter since an M 5.6 on July 6, 2020. The last of significantly larger magnitude was an M 6.3 on July 27, 2019. All of these events occurred between 325 and 500 km depth and caused little damage on the surface. Forecasts 137925 and 137904 had expected today's activity in mid-October around October 17-18. This earthquake is located at 105 degrees from the M 7.2 Guerrero Mexico quake of September 8 and may have been promoted by energy from this source.
O: 21OCT2021 08:36:47 32.1N 138.2E Mw=5.5 EMSC IZU ISLANDS, JAPAN REGION
P: 17OCT2021 137904 30.0N 139.0E 3.5-5.1 BCAAA Central/So. Honshu Japan
P: 18OCT2021 137925 31.0N 141.0E 4.0-5.5 BBBAA Off East Coast Honshu
A light earthquake of M 3.7 was widely felt in central California today and was followed by several lightly felt aftershocks and a foreshock. NEIC reported the mainshock was felt with intensity II-III in Central California at Gonzales, Hollister, Salinas, San Juan Bautista, Soledad, Paicines and Castroville among others. NEIC reported the aftershock of M 2.6 in Central California was felt with intensity II-III in the area(s) of Central California at Salinas, Paicines, Marina, Los Banos and Seaside. While a similar M 3.7 hit the area on October 4 with the new moon, the last earthquake of larger magnitude in the area was an M 4.1 on August 31, 2021. Today's M 3.7 occurred within minutes of local solar midnight and was probably promoted by high tidal stresses associated with today's full moon, as was the event on October 4. Forecast 137898 had expected today's event in the region was likely around October 19.
O: 20OCT2021 08:52:50 36.7N 121.3W ML=2.4 EMSC CENTRAL CALIFORNIA
O: 20OCT2021 08:57:14 36.7N 121.4W ML=3.6 EMSC CENTRAL CALIFORNIA
O: 20OCT2021 14:07:02 36.7N 121.3W Md=2.6 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137898 36.2N 120.8W 2.5-4.8 AAAAA Central California
An earthquake of M 4.1-4.2 in Alberta, Canada was the largest in the U.S. or Canada today. It may have been lightly felt in this remote area of the Rocky Mountains. Five earthquakes of M>=4.1 have hit within about 150 km of this epicenter in the past 30 years - all of which were M 4.1-4.4. The last of these was an M 4.4 about 150 km southwest of today's epicenter on February 14, 2021. An M 4.3 hit nearer today's epicenter on March 10, 2019. Forecast 138012 had expected today's event this area was likely around October 18.
O: 21OCT2021 03:23:20 52.7N 114.5W MB=4.2 ECAN OF ROCKY MOUNTAIN HOUSE, AB
O: 21OCT2021 03:23:24 52.7N 115.0W ML=4.1 EMSC ALBERTA, CANADA
P: 18OCT2021 138012 52.0N 115.0W 2.0-4.2 BAAAA Alberta
An earthquake of M 3.4 was also felt in southeastern Idaho today. NEIC reported this earthquake of M 3.4 in Southeastern Idaho was felt with intensity II-III in the area(s) of Southeastern Idaho in Pocatello and Hayden with IV in Montpelier and in Wyoming with III in Afton, Auburn and Freedom. The last earthquake of greater or equal magnitude within about 100 km of this epicenter was an M 4.2 on January 3, 2021. Forecast 138009 had expected enhanced seismicity in this area was likely in mid-October.
O: 21OCT2021 02:38:50 42.5N 111.2W ML=3.4 EMSC SOUTHERN IDAHO
O: 21OCT2021 02:25:59 42.5N 111.2W ML=2.9 EMSC SOUTHERN IDAHO
P: 14OCT2021 138009 43.0N 111.5W 2.0-3.9 CAAAA Yellowstone/Wyoming
A similar M 3.4 was felt in the area of south-central Idaho in the aftershock area of the M 6.1 of March 31, 2020. This is not an unusual aftershock in this long term aftershock sequence but is the largest since an M 4.0 on October 2, 2021. Forecast 137982 had expected this event was likely around October 17. NEIC reported this earthquake of M 3.1-3.4 in Southern Idaho was felt with intensity II-III in the area(s) of Southern Idaho at Stanley and Meridian.
O: 20OCT2021 07:25:52 44.1N 115.1W Ml=3.4 EMSC SOUTHERN IDAHO
O: 20OCT2021 15:03:06 44.3N 115.2W Ml=2.0 EMSC SOUTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 BAAAA Montana/Idaho
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: 21OCT2021 06:05:11 27.8N 58.5E mb=4.9 EMSC SOUTHEASTERN IRAN
P: 17OCT2021 137888 28.0N 55.0E 3.5-5.1 BACAA So. Iran/Persian Gulf
O: 21OCT2021 00:12:23 43.9N 84.3E mb=4.6 EMSC NORTHERN XINJIANG, CHINA
P: 15OCT2021 137978 41.0N 82.0E 4.0-5.6 CCBAA Kirgizstan/Xinjiang
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 20OCT2021 12:47:59 4.2S 143.3E mb=4.3 EMSC NEW GUINEA, PAPUA NEW GUINEA
P: 20OCT2021 137839 3.0S 144.0E 4.0-5.4 ABAAA Papua New Guinea
O: 20OCT2021 18:53:18 7.8S 106.5E ML=4.2 EMSC JAVA, INDONESIA
P: 15OCT2021 137841 9.0S 107.0E 4.0-5.4 BBAAA So. of Java
O: 20OCT2021 09:21:11 8.2S 116.8E mb=4.8 EMSC LOMBOK REGION, INDONESIA
P: 16OCT2021 137845 8.0S 117.0E 4.0-5.4 BAAAA Sumbawa Island area
NEIC reported this earthquake of M 4.8 in Lombok, Indonesia was felt with intensity IV in the area(s) of Lombok, Indonesia at Sumbawa.
O: 20OCT2021 21:48:46 18.6N 121.1E mb=4.2 EMSC LUZON, PHILIPPINES
P: 18OCT2021 137862 19.0N 121.0E 3.5-5.0 AAAAA Luzon, Philippines
NEIC reported this earthquake of M 4.2 in Luzon, Philippines was felt with intensity II-III in the area(s) of Luzon, Philippines at Claveria, Cagayan Valley and Pasilquin, Ilocos.
CENTRAL AND SOUTH AMERICA
O: 20OCT2021 17:57:21 13.0N 89.5W ML=4.0 EMSC OFFSHORE EL SALVADOR
P: 18OCT2021 137867 13.0N 88.0W 3.5-5.5 AABAA Nicaragua
O: 20OCT2021 08:57:30 16.4N 93.2W ML=4.1 EMSC CHIAPAS, MEXICO
P: 17OCT2021 137854 14.0N 93.0W 3.5-5.3 BCAAA Chiapas, Mexico
O: 20OCT2021 07:17:37 18.1N 103.3W ML=4.2 EMSC OFFSHORE MICHOACAN, MEXICO
P: 20OCT2021 137871 16.0N 100.0W 3.5-5.3 ABBAA Oaxaca, Mexico
O: 20OCT2021 19:37:45 18.2N 68.5W Md=3.6 EMSC MONA PASSAGE, DOMINICAN REPUBL
P: 20OCT2021 137872 18.0N 67.0W 3.4-5.1 AAAAA Puerto Rico
O: 20OCT2021 08:58:28 18.4N 73.5W ML=3.5 EMSC HAITI REGION
O: 21OCT2021 04:23:50 18.4N 73.5W ML=3.2 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 CAAAA Haiti
O: 20OCT2021 09:22:53 27.4N 111.3W ML=3.4 EMSC GULF OF CALIFORNIA
P: 13OCT2021 137881 28.0N 112.0W 3.5-4.9 CAAAA Gulf of California
AFRICA AND EUROPE
O: 21OCT2021 00:45:47 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 21OCT2021 02:14:47 28.7N 17.8W ML=4.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 20OCT2021 07:45:38 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 CAAAA Canary Islands
O: 21OCT2021 08:12:58 35.2N 25.3E ML=4.3 EMSC CRETE, GREECE
P: 19OCT2021 137906 34.0N 24.0E 3.0-4.7 ABAAA Crete
NEIC reported this earthquake of M 4.8 in Crete, Greece was felt with intensity II-III in the area(s) of Crete, Greece at Nea Alikarnassoc, Limin and Stalis, Iraklion.
O: 20OCT2021 15:05:46 38.7N 43.2E mb=4.4 EMSC EASTERN TURKEY
P: 15OCT2021 137960 38.0N 43.0E 3.5-5.0 BAAAA Turkey
NEIC reported this earthquake of M 4.4 in Eastern Turkey was felt with intensity II-III in the area(s) of Eastern Turkey at Ercis and Van.
O: 21OCT2021 00:28:55 46.4N 13.1E ML=3.8 EMSC NORTHERN ITALY
P: 16OCT2021 137971 46.0N 14.0E 3.0-5.1 BAAAA Austria
O: 21OCT2021 05:17:39 63.9N 22.2W ML=3.6 EMSC ICELAND REGION
P: 18OCT2021 138038 62.0N 23.0W 3.0-4.6 BBAAA Iceland area
SOUTHWEST PACIFIC
O: 21OCT2021 08:10:43 25.2S 179.6E mw=6.0 ANSS Fiji
O: 21OCT2021 08:10:44 25.3S 179.7E Mw=6.0 EMSC SOUTH OF FIJI ISLANDS
P: 19OCT2021 138068 22.0S 179.0W 4.0-5.6 ACAAA Tonga Islands
P: 19OCT2021 138069 23.0S 179.0E 4.0-5.4 ACAAA Tonga/Fiji
O: 21OCT2021 03:37:20 16.8S 172.8W mb=4.8 EMSC SAMOA ISLANDS REGION
P: 12OCT2021 138057 17.0S 172.0W 4.0-5.7 CAAAA Tonga Islands
OCEAN RIDGES
O: 20OCT2021 19:37:07 57.7S 25.2W mb=4.9 EMSC SOUTH SANDWICH ISLANDS REGION
P: 14OCT2021 138085 57.0S 26.0W 4.0-5.8 CAAAA So. Sandwich Islands
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 21OCT2021 03:10:49 34.3S 179.2E ML=4.3 EMSC SOUTH OF KERMADEC ISLANDS
O: 21OCT2021 08:12:01 32.6S 178.7E ML=4.7 EMSC SOUTH OF KERMADEC ISLANDS
P: 18OCT2021 138076 32.0S 179.0E 4.0-5.5 BAAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 21OCT2021 08:36:47 32.1N 138.2E Mw=5.5 EMSC IZU ISLANDS, JAPAN REGION
P: 17OCT2021 137904 30.0N 139.0E 3.5-5.1 BCAAA Central/So. Honshu Japan
P: 18OCT2021 137925 31.0N 141.0E 4.0-5.5 BBBAA Off East Coast Honshu
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 21OCT2021 05:49:41 31.3N 114.4W ML=4.1 EMSC GULF OF CALIFORNIA
P: 15OCT2021 137930 31.0N 114.3W 2.5-4.7 CAAAA So. California
O: 20OCT2021 20:07:18 31.4N 115.6W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
P: 17OCT2021 137929 31.9N 116.3W 2.5-4.7 BAAAA So. California
O: 21OCT2021 00:50:55 33.2N 115.6W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 15OCT2021 137932 32.8N 116.0W 2.5-4.7 CAAAA So. California
O: 20OCT2021 23:39:43 35.6N 117.6W Ml=2.0 EMSC SOUTHERN CALIFORNIA
O: 20OCT2021 21:27:17 36.1N 117.8W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137945 35.7N 118.1W 2.5-4.7 AAAAA So. California
O: 20OCT2021 08:52:50 36.7N 121.3W ML=2.4 EMSC CENTRAL CALIFORNIA
O: 20OCT2021 08:57:14 36.7N 121.4W ML=3.6 EMSC CENTRAL CALIFORNIA
O: 20OCT2021 14:07:02 36.7N 121.3W Md=2.6 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137898 36.2N 120.8W 2.5-4.8 AAAAA Central California
O: 20OCT2021 22:03:37 37.5N 115.4W ml=2.1 EMSC NEVADA
P: 20OCT2021 137895 37.1N 117.8W 2.5-4.7 AACAA California/Nevada area
O: 20OCT2021 12:36:13 38.6N 119.5W Md=2.4 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 BAAAA California/Nevada area
O: 21OCT2021 04:56:12 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 18OCT2021 137901 38.7N 122.7W 2.5-4.6 BAAAA Central California
O: 20OCT2021 19:27:16 40.5N 124.0W Ml=2.4 EMSC NORTHERN CALIFORNIA
P: 17OCT2021 137993 40.2N 124.2W 2.5-4.6 BAAAA Off Coast of No. Calif
O: 20OCT2021 09:46:06 40.6N 122.4W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 19OCT2021 137992 40.6N 122.4W 2.5-4.6 AAAAA Northern California
ALASKA
O: 21OCT2021 08:24:43 55.3N 155.4W ml=4.2 EMSC SOUTH OF ALASKA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 BABAA Alaska Peninsula
O: 21OCT2021 03:31:02 55.5N 131.3W ML=3.0 EMSC SOUTHEASTERN ALASKA
P: 14OCT2021 138027 58.0N 136.0W 3.0-4.6 CCBAA Southeast Alaska
O: 20OCT2021 13:31:14 62.1N 149.7W ml=3.4 EMSC CENTRAL ALASKA
P: 20OCT2021 138036 62.8N 149.1W 3.2-5.3 AAAAA Central Alaska
NEIC reported this earthquake of M 3.4 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska in Chugiak, Anchorage, Skwentna and IV in Eagle River.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 21OCT2021 03:23:20 52.7N 114.5W MB=4.1 ECAN OF ROCKY MOUNTAIN HOUSE, AB
O: 21OCT2021 03:23:24 52.7N 115.0W ML=4.1 EMSC ALBERTA, CANADA
P: 18OCT2021 138012 52.0N 115.0W 2.0-4.2 BAAAA Alberta
O: 19OCT2021 21:49:44 60.0N 138.1W MB=3.5 ECAN Haines Junction, YT
P: 14OCT2021 138027 58.0N 136.0W 3.0-4.6 BBAAA Southeast Alaska
O: 19OCT2021 21:11:18 50.2N 130.2W MB=3.5 ECAN Port Alice, BC
P: 18OCT2021 138005 49.9N 130.2W 2.8-5.3 AAAAA Vancouver Island area
O: 19OCT2021 14:56:29 49.7N 123.6W MB=2.6 ECAN Sechelt, BC
P: 15OCT2021 138008 48.9N 122.1W 2.0-4.2 BABAA Washington state, U.S.
ROCKY MOUNTAINS REGION
O: 20OCT2021 08:18:05 31.7N 104.0W ML=2.3 EMSC WESTERN TEXAS
O: 20OCT2021 10:34:11 31.7N 104.0W ML=2.1 EMSC WESTERN TEXAS
O: 20OCT2021 16:16:54 31.8N 104.6W ML=2.3 EMSC WESTERN TEXAS
O: 20OCT2021 08:03:26 31.7N 104.3W ML=2.9 EMSC WESTERN TEXAS
O: 21OCT2021 02:38:50 42.5N 111.2W ML=3.4 EMSC SOUTHERN IDAHO
O: 21OCT2021 02:25:59 42.5N 111.2W ML=2.9 EMSC SOUTHERN IDAHO
P: 14OCT2021 138009 43.0N 111.5W 2.0-3.9 CAAAA Yellowstone/Wyoming
O: 20OCT2021 07:25:52 44.1N 115.1W Ml=3.4 EMSC SOUTHERN IDAHO
O: 20OCT2021 15:03:06 44.3N 115.2W Ml=2.0 EMSC SOUTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 BAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 21OCT2021 07:25:05 35.1N 96.1W ML=2.3 EMSC OKLAHOMA
O: 20OCT2021 22:04:16 35.1N 96.1W ML=2.2 EMSC OKLAHOMA
P: 17OCT2021 137955 36.0N 97.0W 2.0-4.1 BAAAA Southern Plains
HAWAII
No earthquakes of M>=3 were located in Hawaii.
SOUTHWEST PACIFIC ACTIVE
EARTHQUAKE SUMMARY FOR OCTOBER 19, 2021
The strongest earthquake in the world today was an M 5.6 in Tonga. NEIC reported it was felt with maximum intensity V in Tonga at Haveloloto; IV in Nuku'alofa and III in Tofoa-Koloua, Tonagtapu. The last earthquake within about 200 km of this epicenter with M>=5.6 occurred as an M 5.9 on September 5, 2021 about 100 km southeast of today's epicenter. Forecast 138067 had expected this earthquake was likely around October 18. This event occurred within about an hour of local solar midnight and was probably promoted by high tidal stresses which maximize near this hour.
O: 19OCT2021 10:28:45 21.3S 175.8W mb=5.0 EMSC TONGA
O: 19OCT2021 10:28:45 21.3S 175.8W mb=5.6 ANSS TONGA
P: 18OCT2021 138067 20.0S 174.0W 4.0-5.8 ABBAA Tonga Islands
An earthquake of M 5.1 also occurred today in the Santa Cruz Islands north of
Vanuatu. It was not reported felt in this remote area. An M 5.4 hit about 100 km north of this on September 12, 2021. NEIC reported this earthquake of M 5.1 in the Santa Cruz Islands was felt with intensity II-III in the area(s) of the Solomon Islands at Kirakira Makira and Ulawa. Forecasts 138059 and 138052 had expected enhanced seismicity in this region was likely in mid-October.
O: 20OCT2021 06:38:28 11.8S 166.8E mb=5.1 EMSC SANTA CRUZ ISLANDS
P: 15OCT2021 138059 11.0S 165.0E 4.0-5.4 BABAA Vanuatu Islands
P: 19OCT2021 138052 11.0S 162.0E 4.0-5.5 AACAA Vanuatu Islands
A moderate earthquake of M 4.7-5.3 also occurred south of New Zealand in the Snares Island area today. GEONET reported this earthquake was felt by five persons, four with weak intensity and 1 with moderate shaking. The last earthquake in the Snare's Island area of New Zealand with M>=5.3 occurred on November 24, 2018 with M 5.8. A strong quake of M 6.6 occurred on July 11, 2017. Forecast 138081 had expected today's activity was likely around October 17.
O: 19OCT2021 21:11:17 47.1S 165.7E mb=4.7 EMSC OFF W. COAST OF S. ISLAND, N.Z
O: 19OCT2021 21:11:22 46.8S 165.8E ML=5.3 GEONET Felt by five persons,
P: 17OCT2021 138081 45.0S 168.0E 3.0-5.1 ACBAA So. Island, N.Z.
The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Rat Islands, Aleutians, Alaska. It was not reported felt in this remote area. The last earthquake within about 200 km of this epicenter in the Rat Islands with M>=4.9 occurred on July 11, 2021 with M 5.4 and 5.1. Today's earthquake occurred within about 30 minutes of local solar noon and may have been promoted by high tidal stresses which maximize near this hour. Forecast 138024 had expected today in this region was likely around October 17.
O: 19OCT2021 23:30:05 50.3N 178.7E mb=4.9 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 17OCT2021 138024 52.0N 177.0E 4.0-5.8 ABAAA Rat Islands
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: 20OCT2021 01:05:00 43.2N 77.6E mb=4.0 EMSC EASTERN KAZAKHSTAN
P: 15OCT2021 137978 40.0N 75.0E 4.0-5.6 BCBAA Kirgizstan/Xinjiang
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 20OCT2021 06:10:49 2.3S 139.2E mb=4.9 EMSC NEAR N COAST OF PAPUA, INDONES
P: 19OCT2021 137847 2.0S 139.0E 4.0-5.4 AAAAA West Irian, PNG
O: 19OCT2021 13:03:36 3.9S 136.0E ML=4.4 EMSC PAPUA, INDONESIA
P: 13OCT2021 137846 2.0S 135.0E 4.0-5.5 CBAAA West Irian, PNG
O: 19OCT2021 23:30:51 5.0N 125.9E ML=4.2 EMSC MINDANAO, PHILIPPINES
P: 20OCT2021 137824 4.0N 125.0E 4.0-5.4 AAAAA Mindanao, Philippines
O: 19OCT2021 22:12:24 11.0N 124.8E mb=4.4 EMSC LEYTE, PHILIPPINES
P: 18OCT2021 137861 12.0N 122.0E 3.5-5.0 AACAA Luzon, Philippines
NEIC reported this earthquake of M 4.4 in Leyte, Philippines was felt with intensity II-III in the area(s) of Leyte, Philippines in Dagami, Eastern Visayas.
O: 20OCT2021 03:28:30 21.8N 144.5E mb=4.9 EMSC MARIANA ISLANDS REGION
P: 13OCT2021 137892 20.0N 146.0E 4.0-5.4 CBBAA Volcano Islands
CENTRAL AND SOUTH AMERICA
O: 19OCT2021 17:58:58 8.5N 83.0W ML=4.0 EMSC PANAMA-COSTA RICA BORDER REGION
O: 19OCT2021 19:53:26 8.1N 83.2W mb=4.5 EMSC COSTA RICA
P: 19OCT2021 137821 9.0N 84.0W 3.5-4.9 AAAAA Costa Rica
NEIC reported this earthquake of M 4.5 in Costa Rica was felt with intensity II-III in the area(s) of Panama at Volcan, Chiriqui.
O: 19OCT2021 23:22:09 10.9N 86.3W ML=3.9 EMSC OFF COAST OF COSTA RICA
P: 20OCT2021 137866 11.0N 87.0W 3.5-5.3 AAAAA Nicaragua
O: 19OCT2021 19:01:11 15.6N 93.6W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
O: 19OCT2021 18:34:56 15.5N 93.6W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
P: 17OCT2021 137854 14.0N 93.0W 3.5-5.3 ABAAA Chiapas, Mexico
O: 19OCT2021 08:17:03 15.8N 95.0W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 17OCT2021 137870 15.0N 96.0W 3.5-5.6 AAAAA Oaxaca, Mexico
O: 19OCT2021 20:02:59 16.3N 98.0W ML=4.1 EMSC OAXACA, MEXICO
P: 19OCT2021 137870 16.0N 98.0W 3.5-5.4 AAAAA Oaxaca, Mexico
O: 19OCT2021 15:24:23 18.0N 66.8W Md=3.1 EMSC PUERTO RICO REGION
P: 20OCT2021 137872 18.0N 67.0W 3.4-5.1 AAAAA Puerto Rico
O: 19OCT2021 21:57:23 18.5N 73.7W ML=3.1 EMSC HAITI REGION
O: 19OCT2021 14:15:36 19.7N 72.3W ML=3.1 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 BAAAA Haiti
O: 19OCT2021 08:01:23 18.7N 65.1W Md=3.4 EMSC VIRGIN ISLANDS REGION
O: 19OCT2021 07:40:34 19.3N 67.3W Md=3.5 EMSC PUERTO RICO REGION
O: 19OCT2021 22:28:42 19.4N 67.1W Md=3.0 EMSC PUERTO RICO REGION
P: 18OCT2021 137873 19.0N 66.0W 3.4-5.1 AAAAA Puerto Rico
O: 19OCT2021 12:17:52 19.7N 70.8W ML=3.0 EMSC DOMINICAN REPUBLIC
P: 16OCT2021 137874 19.0N 71.0W 3.4-4.9 BAAAA Dominican Republic
O: 19OCT2021 18:37:55 27.7S 71.2W Mw=4.2 EMSC OFFSHORE ATACAMA, CHILE
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 BBAAA Coast Central Chile
NEIC reported this earthquake of M 4.2 in Atacama, Chile was felt with intensity II-III in the area(s) of Atacama, Chile at Copiapo.
O: 20OCT2021 01:21:27 45.7S 77.8W mb=4.2 EMSC OFF COAST OF AISEN, CHILE
P: 14OCT2021 138077 43.0S 83.0W 4.0-5.8 CCCAA Chile Rise
AFRICA AND EUROPE
O: 19OCT2021 18:08:39 12.8S 45.6E ML=3.3 EMSC MAYOTTE REGION
P: 18OCT2021 138051 12.0S 45.0E 3.0-4.6 AAAAA Madagascar area
O: 19OCT2021 21:47:58 28.7N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 19OCT2021 14:10:15 28.6N 17.8W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 BAAAA Canary Islands
O: 19OCT2021 17:43:32 37.0N 5.3W ML=4.1 EMSC SPAIN
P: 17OCT2021 137914 37.0N 4.0W 3.5-5.4 AAAAA Morocco/Spain
O: 20OCT2021 02:44:05 35.0N 25.3E mb=4.3 EMSC CRETE, GREECE
P: 19OCT2021 137906 34.0N 24.0E 3.0-4.7 AAAAA Crete
NEIC reported this earthquake of M 4.3 in Greece was felt with intensity II-III in the area(s) of Greece at Dafnes, Gournai, Khanion tou Kokkini, Kato Govai, Limin Khersonisou, Stalis, Anissarias, Ilea Alkarnossos, Gazion, Iraklion.
O: 20OCT2021 04:45:43 43.2N 45.7E mb=4.7 EMSC CAUCASUS REGION, RUSSIA
P: 15OCT2021 137960 38.0N 43.0E 3.5-5.0 BCBAA Turkey
NEIC reported this earthquake of M 4.7 in the Caucasus was felt with intensity II-III in the area(s) of the Caucasus, Russia with IV in Starja Sunza Cacenja and Nalchik Kabardino-Balkaria.
SOUTHWEST PACIFIC
O: 20OCT2021 06:38:28 11.8S 166.8E mb=5.1 EMSC SANTA CRUZ ISLANDS
P: 15OCT2021 138059 11.0S 165.0E 4.0-5.4 BABAA Vanuatu Islands
P: 19OCT2021 138052 11.0S 162.0E 4.0-5.5 AACAA Vanuatu Islands
O: 19OCT2021 10:18:19 15.2S 177.7W mb=4.1 EMSC FIJI REGION
P: 18OCT2021 138053 15.0S 177.0W 4.0-5.4 AAAAA Samoa Islands
O: 19OCT2021 10:28:45 21.3S 175.8W mb=5.0 EMSC TONGA
P: 18OCT2021 138067 20.0S 174.0W 4.0-5.8 ABBAA Tonga Islands
OCEAN RIDGES
O: 20OCT2021 01:02:58 58.5S 24.3W mb=4.8 EMSC SOUTH SANDWICH ISLANDS REGION
P: 14OCT2021 138085 57.0S 26.0W 4.0-5.8 CBAAA So. Sandwich Islands
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 19OCT2021 21:11:17 47.1S 165.7E mb=4.7 EMSC OFF W. COAST OF S. ISLAND, N.Z
O: 19OCT2021 21:11:22 46.8S 165.8E ML=5.3 GEONET Felt by five persons,
P: 17OCT2021 138081 45.0S 168.0E 3.0-5.1 ACBAA So. Island, N.Z.
GEONET reported this earthquake was felt by five persons, four with weak intensity and 1 with moderate shaking.
JAPAN AND KURIL ISLANDS
O: 19OCT2021 22:10:48 41.6N 142.9E mb=4.5 EMSC HOKKAIDO, JAPAN REGION
O: 19OCT2021 15:18:19 41.7N 142.8E mb=4.5 EMSC HOKKAIDO, JAPAN REGION
O: 19OCT2021 12:36:39 41.6N 142.9E Mw=5.1 EMSC HOKKAIDO, JAPAN REGION
P: 17OCT2021 137975 40.0N 142.0E 3.5-5.6 ABAAA Hokkaido, Japan
NEIC reported these earthquakes of M 5.1 and 4.5 in Hokkaido, Japan were felt with intensity II-III in the area(s) of Hokkaido, Japan at Misawa, Aomori, Citose and Otofuke.
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 19OCT2021 21:49:58 31.1N 115.0W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
P: 17OCT2021 137929 31.9N 116.3W 2.5-4.7 AAAAA So. California
O: 19OCT2021 19:11:09 33.7N 116.8W ML=2.5 EMSC SOUTHERN CALIFORNIA
O: 19OCT2021 18:11:45 33.7N 116.8W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 14OCT2021 137935 33.9N 116.9W 2.5-4.4 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, Aguanga, Hemet, Palm Springs, Sun City.
O: 20OCT2021 01:15:34 36.2N 117.9W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 20OCT2021 03:18:22 36.4N 117.8W ML=2.1 EMSC CENTRAL CALIFORNIA
O: 19OCT2021 19:27:45 36.2N 117.9W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137945 35.7N 118.1W 2.5-4.7 AAAAA So. California
O: 19OCT2021 13:56:35 36.6N 121.2W Md=2.3 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137898 36.2N 120.8W 2.5-4.8 AAAAA Central California
O: 19OCT2021 08:11:24 38.1N 118.9W Md=2.3 EMSC CENTRAL CALIFORNIA
O: 20OCT2021 00:18:08 38.1N 118.8W ML=2.4 EMSC CENTRAL CALIFORNIA
P: 15OCT2021 137896 37.3N 118.3W 2.5-4.9 BAAAA California/Nevada area
O: 19OCT2021 09:29:09 38.4N 119.6W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 19OCT2021 18:27:54 38.5N 119.5W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 BAAAA California/Nevada area
O: 20OCT2021 05:20:51 38.8N 122.8W Md=2.7 EMSC NORTHERN CALIFORNIA
O: 20OCT2021 04:05:04 38.8N 122.8W Ml=3.4 EMSC NORTHERN CALIFORNIA
P: 18OCT2021 137901 38.7N 122.7W 2.5-4.6 AAAAA Central California
NEIC reported this earthquake of M 3.4 in the Geysers, northern California was felt with intensity II-III in the area(s) of the Geysers, northern California in Geyserville, Middletown, Kelseyville, HJealdsburg, Calistoga, Forestville, Sant Rosa and Saint Helena.
ALASKA
O: 19OCT2021 23:30:05 50.3N 178.7E mb=4.9 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 17OCT2021 138024 52.0N 177.0E 4.0-5.8 ABAAA Rat Islands
O: 19OCT2021 23:18:15 56.8N 155.9W ML=3.0 EMSC ALASKA PENINSULA
O: 19OCT2021 20:25:53 56.2N 156.6W ML=3.1 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 AAAAA Alaska Peninsula
O: 19OCT2021 18:17:23 58.9N 142.9W ml=3.8 EMSC GULF OF ALASKA
P: 17OCT2021 138032 60.2N 147.1W 3.2-5.1 AABAA Central Alaska
O: 19OCT2021 08:24:50 59.8N 152.9W ML=3.1 EMSC SOUTHERN ALASKA
P: 15OCT2021 138031 60.0N 153.5W 3.2-5.4 BAAAA Central Alaska
O: 19OCT2021 08:06:28 62.7N 149.6W mb=3.9 EMSC CENTRAL ALASKA
P: 18OCT2021 138035 62.7N 149.3W 3.2-5.3 AAAAA Central Alaska
NEIC reported this earthquake of M 3.9 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska in Willow, Wasilla, Chugiak, Palmer, Anchorage and Girdwood with IV in Talkeetna.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 19OCT2021 14:56:27 49.7N 123.6W ML=2.5 EMSC BRITISH COLUMBIA, CANADA
P: 12OCT2021 138008 49.0N 123.0W 2.0-4.1 CAAAA Washington state, U.S.
NEIC reported this earthquake of M 2.5 in British Columbia was felt with intensity II-III in the area(s) of British Columbia at Sechelt and Vancouver.
O: 19OCT2021 21:49:44 60.1N 138.2W ML=3.4 EMSC SOUTHERN YUKON TERRITORY, CANA
O: 19OCT2021 21:49:44 60.0N 138.1W MB=3.5 ECAN Haines Junction, YT
P: 14OCT2021 138027 58.0N 136.0W 3.0-4.6 BBAAA Southeast Alaska
O: 19OCT2021 21:11:18 50.2N 130.2W MB=3.5 ECAN Port Alice, BC
P: 18OCT2021 138005 49.9N 130.2W 2.8-5.3 AAAAA Vancouver Island area
ROCKY MOUNTAINS REGION
O: 19OCT2021 22:09:26 31.7N 104.0W mb=2.8 EMSC WESTERN TEXAS
O: 19OCT2021 23:32:18 31.7N 104.0W ML=2.7 EMSC WESTERN TEXAS
O: 19OCT2021 11:45:27 32.0N 103.9W ML=2.0 EMSC WESTERN TEXAS
O: 19OCT2021 08:23:47 31.6N 104.0W ML=2.4 EMSC WESTERN TEXAS
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 IN EASTERN MEDITERRANEAN
EARTHQUAKE SUMMARY FOR OCTOBER 18, 2021
The strongest earthquake in the world today was an M 5.9-6.1 in the eastern Mediterranean south of Greece. NEIC reported it was felt with maximum intensity VI in the Dodecanese Islands at Karpathos and V in Falirakion and II-III in Afantou, Koskinou, Lilisos, Kremasti, Rodoa, and in Turkey at Fethiye and Marmara. This may be a regional aftershock of an earthquake of M 6.4 which hit Crete a week ago on October 12, 2012 but is about 200 km to the southeast of that epicenter. The last earthquake of larger size in this region was an M 6.4 on July 15, 2008, the only such event in this area of larger or equal size in the past 30 years. Forecast 137906 had expected today's event was likely in this region around October 13. This epicenter is at 147 degrees from the M 7.2 in Vanuatu of October 2 and may have been promoted by energy from that source.
O: 19OCT2021 05:32:32 34.6N 28.3E Mw=6.0 EMSC EASTERN MEDITERRANEAN SEA
P: 13OCT2021 137906 34.0N 27.0E 3.0-5.6 CAAAA Crete
The eruption of Cumbre Viejo continued today with strong lava fountains from the cone in the Canary Islands. The largest earthquake in the area today was an M 4.2. Larger earthquakes are possible with this eruption as the lava flows continue through new vents. Forecast 137880 had expected enhanced seismicity in the area in mid-October.
O: 19OCT2021 01:29:35 28.6N 17.9W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 18OCT2021 11:33:54 28.6N 17.8W ML=4.2 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
A strong earthquake of M 6.1 also occurred today in northern Vanuatu. NEIC reported it was felt with maximum intensity V in Sola Torba, Vanuatu with IV in Port Olry, Sanma and III in Luganville. This is the strongest earthquake within about 100 km of this epicenter since an M 6.1 on March 18, 2020 but the last of stronger magnitude in the region was an M 6.6 on January 15, 2019. Forecast 138059 had expected this activity in this region was likely around October 14.
O: 18OCT2021 07:26:52 13.7S 167.0E Mw=6.1 EMSC VANUATU
P: 14OCT2021 138059 15.0S 167.0E 4.0-5.4 BBAAA Vanuatu Islands
An unusual earthquake in the Yukon Territory of Canada also occurred today with M 4.4-4.8. This is the strongest earthquake within about 200 km of this epicenter in the Northern Yukon since an M 6.0 about 100 km to the west occurred on December 22, 2017. Forecast 138044 had expected this event was likely within in this area around October 15. This epicenter is at 144 degrees from the M 8.1 in the South Sandwich Islands of August 12, 2021 and was likely promoted by energy from that source.
O: 18OCT2021 07:35:38 65.3N 133.4W ML=4.8 EMSC NORTHERN YUKON TERRITORY, CANADA
O: 18OCT2021 15:17:49 65.3N 133.4W ML=3.9 EMSC NORTHERN YUKON TERRITORY, CANADA
O: 18OCT2021 15:17:49 65.2N 133.3W MB=3.9 ECAN Keno, YT
O: 18OCT2021 07:35:38 65.3N 132.9W MB=4.4 ECAN OF ELSA, YT
O: 18OCT2021 07:35:38 65.3N 133.4W MB=4.8 ECAN Keno, YT
O: 18OCT2021 09:10:05 65.2N 133.6W MB=3.5 ECAN Keno, YT
O: 18OCT2021 09:10:05 65.2N 133.6W ML=3.5 EMSC NORTHERN YUKON TERRITORY, CANA
P: 17OCT2021 138041 66.9N 135.8W 3.0-4.6 ABAAA Northern Alaska
An M 3.4 was widely felt in central California today near Coalinga. NEIC reported intensity II-III with this quake was felt in Coalinga, Huron, Lemoore, Visalia, Clovis, Los Banos, San Juan Bautista. This area has seen four earthquakes of M>=3.4 in the past year - the largest of which was an M 3.8 on September 14, 2021. Forecast 137898 had expected today's event was likely within about 25 km of this epicenter around October 17.
O: 19OCT2021 06:49:25 36.0N 119.8W Md=2.3 EMSC CENTRAL CALIFORNIA
O: 18OCT2021 09:42:15 36.2N 120.2W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 18OCT2021 09:45:06 36.2N 120.2W ML=3.4 EMSC CENTRAL CALIFORNIA
P: 17OCT2021 137898 36.1N 120.1W 2.5-4.8 AAAAA Central California
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: 18OCT2021 08:11:30 27.9N 85.8E ML=4.7 EMSC NEPAL
O: 18OCT2021 09:35:30 27.9N 85.8E ML=4.1 EMSC NEPAL
O: 18OCT2021 09:38:30 27.9N 85.8E ML=4.0 EMSC NEPAL
O: 18OCT2021 08:01:37 27.9N 85.8E mb=4.3 EMSC NEPAL
O: 18OCT2021 10:32:12 28.4N 87.2E mb=4.5 EMSC WESTERN XIZANG
P: 18OCT2021 137966 30.0N 83.0E 3.8-5.4 ABCAA Xizang
O: 18OCT2021 07:21:20 37.5N 72.2E mb=4.4 EMSC TAJIKISTAN
P: 14OCT2021 137909 37.0N 71.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
O: 18OCT2021 23:57:59 50.5N 96.5E mb=4.2 EMSC SOUTHWESTERN SIBERIA, RUSSIA
P: 14OCT2021 137981 46.0N 96.0E 4.0-5.6 BCAAA Mongolia
O: 18OCT2021 08:24:31 54.0N 158.6E Mw=5.2 EMSC KAMCHATKA PENINSULA, RUSSIA
P: 20OCT2021 138017 54.0N 162.0E 4.0-5.4 AABAA E. of Kamchatka
O: 19OCT2021 04:48:47 63.4N 157.8E mb=4.1 EMSC MAGADANSKAYA OBLAST', RUSSIA
INDONESIA AND PHILIPPINES
O: 18OCT2021 16:29:20 1.1N 128.1E ML=4.4 EMSC HALMAHERA, INDONESIA
O: 18OCT2021 07:03:50 2.7N 128.1E mb=4.7 EMSC HALMAHERA, INDONESIA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 AABAA Mindanao, Philippines
O: 19OCT2021 00:37:34 3.7S 134.7E mb=4.7 EMSC PAPUA, INDONESIA
P: 13OCT2021 137846 2.0S 135.0E 4.0-5.5 CBAAA West Irian, PNG
O: 18OCT2021 16:18:54 5.5S 147.1E mb=4.3 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 12OCT2021 137835 7.0S 146.0E 4.0-5.4 CBAAA New Ireland
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 19OCT2021 06:32:20 9.3N 84.7W mb=4.6 EMSC COSTA RICA
P: 19OCT2021 137821 9.0N 84.0W 3.5-4.9 AAAAA Costa Rica
NEIC reported these earthquakes of M 4.4 and 4.6 in Costa Rica were felt with intensity II-III in the area(s) of Costa Rica in Puntarenas at Jaco, Quepos and Paquera.
O: 19OCT2021 05:13:07 9.5N 86.0W mb=4.4 EMSC OFF COAST OF COSTA RICA
P: 20OCT2021 137866 11.0N 87.0W 3.5-5.3 ABAAA Nicaragua
O: 18OCT2021 11:16:00 12.3N 88.1W mb=4.4 EMSC NEAR COAST OF NICARAGUA
P: 18OCT2021 137867 13.0N 88.0W 3.5-5.5 AAAAA Nicaragua
O: 18OCT2021 21:44:04 15.1N 94.5W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO
P: 17OCT2021 137870 15.0N 96.0W 3.5-5.6 AABAA Oaxaca, Mexico
O: 18OCT2021 21:08:24 14.6N 93.7W mb=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO
O: 18OCT2021 22:31:01 15.2N 92.5W mb=4.2 EMSC CHIAPAS, MEXICO
P: 15OCT2021 137857 15.0N 92.0W 3.5-5.1 BAAAA Guatemala
P: 17OCT2021 137854 14.0N 93.0W 3.5-5.3 ABAAA Chiapas, Mexico
O: 19OCT2021 06:45:01 16.0N 96.8W ML=4.2 EMSC OAXACA, MEXICO
O: 18OCT2021 23:23:49 15.6N 96.0W ML=4.2 EMSC OFFSHORE OAXACA, MEXICO
P: 17OCT2021 137870 15.0N 96.0W 3.5-5.6 AAAAA Oaxaca, Mexico
O: 18OCT2021 18:10:22 16.1N 98.3W mb=4.3 EMSC OFFSHORE OAXACA, MEXICO
P: 19OCT2021 137870 16.0N 98.0W 3.5-5.4 AAAAA Oaxaca, Mexico
NEIC reported this earthquake of M 4.3 in Guerrero, Mexico was felt with intensity II-III in the area(s) of Tlalnepantla, Mexico.
O: 18OCT2021 07:26:36 17.2S 70.5W mb=4.0 EMSC SOUTHERN PERU
P: 16OCT2021 138056 18.0S 71.0W 4.0-5.7 AAAAA So. Peru/Bolivia
O: 18OCT2021 23:58:07 18.2N 66.8W Md=3.2 EMSC PUERTO RICO
P: 20OCT2021 137872 18.0N 67.0W 3.4-5.1 AAAAA Puerto Rico
O: 19OCT2021 02:44:20 18.5N 73.4W ML=3.3 EMSC HAITI REGION
O: 18OCT2021 08:54:34 18.9N 72.8W ML=3.0 EMSC HAITI REGION
O: 19OCT2021 04:20:31 19.0N 73.9W ML=3.9 EMSC HAITI REGION
O: 18OCT2021 10:45:03 18.5N 73.7W ML=3.4 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 BAAAA Haiti
O: 18OCT2021 20:56:25 18.7N 67.3W Md=3.2 EMSC PUERTO RICO REGION
O: 18OCT2021 13:45:23 18.7N 68.0W Md=3.3 EMSC DOMINICAN REPUBLIC REGION
O: 18OCT2021 08:14:19 18.8N 67.3W Md=3.2 EMSC PUERTO RICO REGION
P: 20OCT2021 137872 18.0N 67.0W 3.4-5.1 AAAAA Puerto Rico
O: 19OCT2021 02:22:35 19.2N 66.5W Md=3.4 EMSC PUERTO RICO REGION
P: 18OCT2021 137873 19.0N 66.0W 3.4-5.1 AAAAA Puerto Rico
O: 19OCT2021 01:12:37 19.3N 65.1W Md=3.7 EMSC VIRGIN ISLANDS REGION
P: 17OCT2021 137859 19.0N 65.0W 3.0-5.2 AAAAA Leeward Islands
O: 18OCT2021 23:22:13 19.3N 69.5W ML=3.1 EMSC DOMINICAN REPUBLIC REGION
P: 16OCT2021 137874 19.0N 71.0W 3.4-4.9 AABAA Dominican Republic
O: 18OCT2021 11:27:12 24.1S 67.2W mb=4.5 EMSC SALTA, ARGENTINA
P: 17OCT2021 138060 24.0S 68.0W 4.0-5.4 AAAAA Argentina
O: 18OCT2021 09:12:47 28.5S 62.9W mb=4.1 EMSC SANTIAGO DEL ESTERO, ARGENTINA
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 BADAA Coast Central Chile
O: 19OCT2021 00:03:33 31.6S 72.1W mb=4.6 EMSC OFFSHORE COQUIMBO, CHILE
P: 14OCT2021 138070 33.0S 72.0W 4.0-5.7 BBAAA Central Chile
NEIC reported this earthquake of M 4.6 in Central Chile was felt with intensity II-III in the area(s) of Central Chile at Illapel, Coquimbo, and in Valparaiso at Vina del Mar and Quilpue.
O: 18OCT2021 18:32:15 45.7S 77.1W mb=4.7 EMSC OFF COAST OF AISEN, CHILE
O: 18OCT2021 22:23:37 45.6S 77.1W Mw=5.1 EMSC OFF COAST OF AISEN, CHILE
P: 14OCT2021 138077 43.0S 83.0W 4.0-5.8 BCCAA Chile Rise
NEIC reported the earthquake of M 5.1 in Aisen, Chile was felt with intensity II-III in the area(s) of Aisen, Chile at Coihaque.
NEIC reported the earthquake of M 4.3 in Nepal was felt with intensity II-III in the area(s) of Nepal in Banepa, Tribuvannagar and Malangwa.
AFRICA AND EUROPE
O: 18OCT2021 20:20:53 12.8S 45.6E ML=3.4 EMSC MAYOTTE REGION
P: 18OCT2021 138051 12.0S 45.0E 3.0-4.6 AAAAA Madagascar area
O: 19OCT2021 01:29:35 28.6N 17.9W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 18OCT2021 11:33:54 28.6N 17.8W ML=4.2 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
O: 19OCT2021 05:32:32 34.6N 28.3E Mw=6.0 EMSC EASTERN MEDITERRANEAN SEA
P: 13OCT2021 137906 34.0N 27.0E 3.0-5.6 CAAAA Crete
SOUTHWEST PACIFIC
O: 19OCT2021 00:16:23 16.0S 174.8W mb=4.3 EMSC TONGA
P: 12OCT2021 138053 15.0S 173.0W 4.0-5.4 CABAA Samoa Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 19OCT2021 01:42:28 58.0S 25.4W mb=4.7 EMSC SOUTH SANDWICH ISLANDS REGION
P: 12OCT2021 138085 58.0S 26.0W 4.0-5.6 CAAAA So. Sandwich Islands
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 18OCT2021 08:56:13 31.4S 179.3E ML=4.2 EMSC KERMADEC ISLANDS REGION
P: 18OCT2021 138076 32.0S 179.0E 4.0-5.5 AAAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 19OCT2021 06:03:30 37.5N 137.2E ML=4.0 EMSC NEAR WEST COAST OF HONSHU, JAP
P: 18OCT2021 137927 37.0N 141.0E 4.0-5.4 AACAA Off East Coast Honshu
O: 19OCT2021 00:03:25 49.4N 156.8E mb=4.2 EMSC KURIL ISLANDS
P: 18OCT2021 138019 51.0N 157.0E 4.0-5.8 ABAAA Kamchatka
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 18OCT2021 17:45:37 34.0N 117.2W Ml=2.2 EMSC GREATER LOS ANGELES AREA, CALI
P: 14OCT2021 137936 33.7N 117.5W 2.5-4.6 BAAAA So. California
O: 18OCT2021 21:16:00 30.6N 113.9W ML=3.6 EMSC GULF OF CALIFORNIA
P: 15OCT2021 137930 31.0N 114.3W 2.5-4.7 BAAAA So. California
O: 18OCT2021 08:46:40 31.1N 116.0W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO
P: 17OCT2021 137929 31.9N 116.3W 2.5-4.7 AAAAA So. California
O: 19OCT2021 06:49:25 36.0N 119.8W Md=2.3 EMSC CENTRAL CALIFORNIA
O: 18OCT2021 09:42:15 36.2N 120.2W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 18OCT2021 09:45:06 36.2N 120.2W ML=3.4 EMSC CENTRAL CALIFORNIA
P: 17OCT2021 137898 36.1N 120.1W 2.5-4.8 AAAAA Central California
O: 18OCT2021 08:13:53 36.6N 121.2W Md=2.3 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137899 36.8N 121.3W 2.5-4.7 BAAAA Central California
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 San Juan Bautista, Salinas, Castroville, Marina, Hollister, Pacific Grove, Los Banos and IV in Aromas.
O: 18OCT2021 07:36:12 37.1N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA
P: 20OCT2021 137895 37.1N 117.8W 2.5-4.7 AAAAA California/Nevada area
NEIC reported this earthquake of M 2.5 in Bishop, California was felt with intensity II-III in the area(s) of Bishop, California.
O: 18OCT2021 20:40:39 37.3N 120.0W Md=2.7 EMSC CENTRAL CALIFORNIA
P: 17OCT2021 137898 36.1N 120.1W 2.5-4.8 ABAAA 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 at Dos Palos, Los Banos.
O: 18OCT2021 10:13:44 38.5N 119.4W ml=2.4 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 AAAAA California/Nevada area
O: 18OCT2021 07:09:59 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 18OCT2021 137901 38.7N 122.7W 2.5-4.6 AAAAA Central California
O: 18OCT2021 21:59:42 40.8N 126.2W ML=3.2 EMSC OFF COAST OF NORTHERN CALIFORN
P: 14OCT2021 137994 40.3N 127.2W 2.5-4.8 BAAAA Off Coast of No. Calif
ALASKA
O: 19OCT2021 02:08:44 55.8N 155.5W ml=3.4 EMSC SOUTH OF ALASKA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 AABAA Alaska Peninsula
O: 18OCT2021 18:57:37 59.8N 152.8W ML=3.1 EMSC SOUTHERN ALASKA
P: 15OCT2021 138031 60.0N 153.5W 3.2-5.4 BAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 18OCT2021 07:35:38 65.3N 133.4W ML=4.8 EMSC NORTHERN YUKON TERRITORY, CANADA
O: 18OCT2021 15:17:49 65.3N 133.4W ML=3.9 EMSC NORTHERN YUKON TERRITORY, CANADA
O: 18OCT2021 15:17:49 65.2N 133.3W MB=3.9 ECAN Keno, YT
O: 18OCT2021 07:35:38 65.3N 132.9W MB=4.4 ECAN OF ELSA, YT
O: 18OCT2021 07:35:38 65.3N 133.4W MB=4.8 ECAN Keno, YT
O: 18OCT2021 09:10:05 65.2N 133.6W MB=3.5 ECAN Keno, YT
O: 18OCT2021 09:10:05 65.2N 133.6W ML=3.5 EMSC NORTHERN YUKON TERRITORY, CANA
P: 17OCT2021 138041 66.9N 135.8W 3.0-4.6 ABAAA Northern Alaska
ROCKY MOUNTAINS REGION
O: 18OCT2021 08:07:22 31.6N 104.2W ML=3.5 EMSC WESTERN TEXAS
O: 18OCT2021 08:08:29 31.6N 104.1W ML=3.1 EMSC WESTERN TEXAS
O: 19OCT2021 06:30:05 44.2N 115.1W Ml=2.1 EMSC SOUTHERN IDAHO
O: 19OCT2021 02:45:45 44.2N 115.1W Ml=2.2 EMSC SOUTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 AAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 19OCT2021 00:12:32 36.5N 98.8W ML=2.0 EMSC OKLAHOMA
P: 15OCT2021 137956 37.0N 98.0W 2.0-4.1 BAAAA Southern Plains
HAWAII
O: 18OCT2021 18:12:51 19.2N 155.4W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII
O: 18OCT2021 22:11:34 19.3N 155.4W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII
P: 17OCT2021 137858 19.4N 155.1W 3.0-4.6 AAAAA Hawaii
O: 18OCT2021 08:56:34 19.9N 156.7W ML=3.4 EMSC HAWAII REGION, HAWAII
P: 14OCT2021 137882 20.3N 156.6W 4.0-5.6 AAAAA Hawaii area
NEIC reported this earthquake of M 3.6 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Kailua Kona, Kamuela and Hilo.
STRONG QUAKE SHAKES VANUATU
EARTHQUAKE SUMMARY FOR OCTOBER 17, 2021
The strongest earthquake in the world today was an M 6.1 in northern Vanuatu. NEIC reported it was felt with maximum intensity V in Sola Torba, Vanuatu with IV in Port Olry, Sanma and III in Luganville. This is the strongest earthquake within about 100 km of this epicenter since an M 6.1 on March 18, 2020 but the last of stronger magnitude in the region was an M 6.6 on January 15, 2019. Forecast 138059 had expected this activity in this region was likely around October 14.
O: 18OCT2021 07:26:52 13.7S 167.0E Mw=6.1 EMSC VANUATU
P: 14OCT2021 138059 15.0S 167.0E 4.0-5.4 BBAAA Vanuatu Islands
An M 4.4 earthquake in northern Albania today was widely felt. NEIC reported maximum shaking with intensity V in Albania at Lezhe, IV in Shkoder, and II-III in Shengjn, Ulcinj, Tirana. It was also felt lightly in Serbia and Montenegro, Croatia and Macedonia. The last earthquake of M>=4.4 within about 150 km of this epicenter in Albania was an M 4.5 on January 26, 2021 and an M 4.6 on March 22, 2021. Forecast 137998 had expected today's event was likely within about 100 km of this epicenter around October 15.
O: 17OCT2021 20:13:30 41.8N 19.8E mb=4.4 EMSC ALBANIA
P: 15OCT2021 137998 41.0N 20.0E 3.0-5.1 AAAAA Romania/NW Turkey
The strongest earthquake in the U.S. or Canada today was an M 4.7 aftershock in the Alaska Peninsula. It may have been felt lightly in the epicentral area. An M 6.9 hit the Alaska Peninsula on October 11 and was followed by an M 4.9 later in the day but this is the largest event in the Alaska Peninsula since those events. Today's M 4.7 is located about 200 km southwest of the M 6.9 on October 11 but is probably a regional aftershock. Forecast 138011 had expected this event was likely within about 50 km around October 18.
O: 17OCT2021 19:32:22 55.1N 157.6W ML=3.2 EMSC ALASKA PENINSULA
O: 17OCT2021 19:27:07 55.1N 157.7W mb=4.7 EMSC ALASKA PENINSULA
O: 18OCT2021 01:34:47 56.3N 156.6W ml=3.0 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 AAAAA Alaska Peninsula
An unusual earthquake in the Yukon Territory of Canada also occurred today with M 4.4. This is the strongest earthquake within about 200 km of this epicenter in the Northern Yukon since an M 6.0 about 100 km to the west occurred on December 22, 2017. Forecast 138044 had expected this event was likely within in this area around October 15.
O: 18OCT2021 07:35:38 65.3N 132.9W MB=4.4 ECAN ELSA, YT
O: 18OCT2021 07:35:38 65.3N 132.9W ML=4.4 EMSC NORTHERN YUKON TERRITORY, CANA
P: 15OCT2021 138044 66.0N 130.0W 2.5-4.1 BAAAA Yukon Territory, Canada
The strongest earthquake in the U.S. or Canada outside Alaska today was an M 4.0 in the Olancha area of Central California. NEIC reported it was felt with maximum intensity IV in Lone Pine and II-III in Ridgecrest, Independence, Lake Isabella, Exeter, Bakersfield, Dinuba, Clovis, Los Angeles and Los Banos, California. This is the strongest earthquake in this aftershock area of Ridgecrest, California since an M 4.0 on February 12 and January 17, 2021 but the last event of significantly larger magnitude in this area was an M 5.8 - the mainshock and an M 4.6 aftershock on June 24, 2020. Forecast 137894 had expected today's event within about 25 km was likely around October 15.
O: 17OCT2021 13:18:59 36.2N 117.9W Mw=4.0 EMSC CENTRAL CALIFORNIA
P: 15OCT2021 137894 36.1N 118.1W 2.5-4.7 AAAAA California/Nevada area
An earthquake of M 3.8-4.0 in Hawaii also was widely felt today. It was reported with intensity VI in Pahala and II-III in Naalehu, Hawaii National Park, Captain Cook, Volcano, Holualoa, Hilo, Mountain View, Pahoa and Kealakekua. This is the strongest earthquake in the region of the Kilauea eruption since an M 4.6 on October 6, 2021. An event of M 6.2 south of Hawaii was followed by an M 4.3 aftershock on October 10, 2021. Forecast 137858 had expected today's event was likely within about 25 km around October 12.
O: 17OCT2021 15:52:11 19.2N 155.5W ML=4.0 EMSC ISLAND OF HAWAII, HAWAII
P: 12OCT2021 137858 18.9N 155.4W 3.0-4.6 BAAAA Hawaii
A second moderate earthquake occurred with M 4.2 in eastern Poland today. This was reported felt with intensity IV in Poland at Glogow and II in Wroclaw and possibly in Belarus. A similar earthquake, both of which may be related regional mining, occurred on October 16, 2021 and was reported in this summary as:
"An unusually large M 4.3 occurred in Poland today. NEIC reported this earthquake of M 4.3 in Lubin, Poland was felt with intensity V in the area(s) of Lubin, Poland. The last earthquake in Poland within about 200 km of this epicenter with M>=4.3 was recorded by NEIC as occurring a year ago near today's epicenter on November 19, 2020; the last of larger magnitude was an M 4.9 on July 8, 2020. Forecast 137738 had expected today's event in early October." (October 16, 2021)
Forecast 138021 had expected the area of northern Germany and western Poland could see enhanced seismicity around October 16.
O: 17OCT2021 12:20:54 51.6N 16.2E mb=4.2 EMSC POLAND
P: 16OCT2021 138021 50.0N 12.0E 3.0-4.4 ABCAA No. Germany
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: 18OCT2021 05:49:17 24.2N 121.8E mb=4.8 EMSC TAIWAN
O: 18OCT2021 05:49:16 24.2N 121.7E ML=5.2 TAI Hualien, Taiwan
P: 13OCT2021 137891 24.0N 121.0E 4.0-5.4 BAAAA Taiwan
P: 18OCT2021 137890 23.0N 122.0E 4.0-5.5 ABAAA Taiwan
CWB reported this earthquake was felt with intensity IV in Hualien, Yilan, Nantou; III in Taichung, Taoyuan; II in Taipei, Hsinchu, Miaoli, Yunlin, and I in Hsinchu, Taitung, Changhua, Chiayi Counties, Taiwan.
NEIC reported this earthquake of M 4.8 in Taiwan was felt with intensity II-III in the area(s) of Taiwan in Taoyuan, Taichung and Changhua.
O: 18OCT2021 00:37:00 29.3N 104.1E mb=4.5 EMSC EASTERN SICHUAN, CHINA
O: 17OCT2021 20:11:58 36.1N 70.8E mb=4.5 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 14OCT2021 137909 37.0N 71.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
O: 18OCT2021 07:21:20 37.5N 72.2E mb=4.4 EMSC TAJIKISTAN
P: 14OCT2021 137909 37.0N 71.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
O: 17OCT2021 17:50:49 55.9N 113.5E mb=4.6 EMSC BURYATIYA, RUSSIA
P: 9OCT2021 137741 56.0N 110.0E 3.0-4.5 CABAA So. Siberia
O: 18OCT2021 04:37:33 51.0N 93.8E mb=4.3 EMSC SOUTHWESTERN SIBERIA, RUSSIA
P: 10OCT2021 137741 51.0N 98.0E 3.0-4.6 CACAA So. Siberia
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 17OCT2021 23:02:48 1.5N 122.7E ML=4.0 EMSC MINAHASA, SULAWESI, INDONESIA
P: 20OCT2021 137824 4.0N 123.0E 4.0-5.5 BCAAA Mindanao, Philippines
O: 17OCT2021 15:02:11 2.1S 125.8E mb=4.6 EMSC KEPULAUAN SULA, INDONESIA
P: 13OCT2021 137844 2.0S 124.0E 4.0-5.5 BABAA Sulawesi area
O: 18OCT2021 07:03:50 2.7N 128.1E mb=4.7 EMSC HALMAHERA, INDONESIA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 ABAAA Mindanao, Philippines
O: 17OCT2021 22:04:33 2.8S 129.4E ML=4.8 EMSC SERAM, INDONESIA
P: 15OCT2021 137830 3.0S 129.0E 4.0-5.5 AAAAA Ceram area
O: 17OCT2021 17:16:05 4.2N 125.9E ML=4.2 EMSC KEPULAUAN SANGIHE, INDONESIA
P: 20OCT2021 137824 4.0N 125.0E 4.0-5.4 BAAAA Mindanao, Philippines
O: 17OCT2021 17:40:36 6.6S 129.4E ML=4.1 EMSC BANDA SEA
O: 17OCT2021 20:12:48 6.5S 129.4E ML=4.1 EMSC BANDA SEA
P: 15OCT2021 137849 7.0S 130.0E 4.0-5.4 AAAAA West Irian, PNG
O: 18OCT2021 00:49:01 10.3S 117.7E ML=4.4 EMSC SOUTH OF SUMBAWA, INDONESIA
P: 16OCT2021 137845 8.0S 117.0E 4.0-5.4 ACAAA Sumbawa Island area
O: 17OCT2021 10:51:55 13.6N 123.2E ML=4.2 EMSC LUZON, PHILIPPINES
P: 14OCT2021 137861 14.0N 122.0E 3.5-5.1 BAAAA Luzon, Philippines
CENTRAL AND SOUTH AMERICA
O: 18OCT2021 02:51 20.2S 70.5W mb=4.1 GUC Tarapaca at Iquique and Pozo A
P: 14OCT2021 138066 20.0S 70.0W 4.0-5.9 BAAAA So. Peru/Bolivia
CWB reported thise earthquake was felt with intensity III in Tarapaca at Iquique and Pozo Almonte and II in Alto Hospicio, Chile.
O: 17OCT2021 22:16:30 7.5N 82.3W ML=4.3 EMSC SOUTH OF PANAMA
P: 13OCT2021 137821 8.0N 82.0W 3.5-5.1 BAAAA Costa Rica
O: 17OCT2021 23:26:32 16.7N 93.9W mb=4.4 EMSC CHIAPAS, MEXICO
P: 13OCT2021 137854 17.0N 94.0W 3.5-5.2 BAAAA Chiapas, Mexico
NEIC reported this earthquake of M 4.4 in Chiapas, Mexico was felt with intensity II-III in the area(s) of Chiapas, Mexico at Tuxtla Gutierrez.
O: 18OCT2021 07:26:36 17.2S 70.5W mb=4.0 EMSC SOUTHERN PERU
P: 16OCT2021 138056 18.0S 71.0W 4.0-5.7 AAAAA So. Peru/Bolivia
O: 17OCT2021 12:47:09 18.0N 68.5W Md=3.7 EMSC DOMINICAN REPUBLIC REGION
P: 12OCT2021 137872 18.0N 68.0W 3.4-5.1 BAAAA Puerto Rico
O: 17OCT2021 09:25:07 18.8N 73.8W ML=3.7 EMSC HAITI REGION
O: 17OCT2021 11:30:09 18.9N 74.0W ML=3.3 EMSC HAITI REGION
O: 17OCT2021 20:38:05 18.9N 74.0W ML=3.3 EMSC HAITI REGION
O: 18OCT2021 00:01:52 18.9N 74.0W ML=3.1 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 BAAAA Haiti
O: 18OCT2021 02:48:42 19.1N 66.5W Md=3.5 EMSC PUERTO RICO REGION
P: 18OCT2021 137873 19.0N 66.0W 3.4-5.1 AAAAA Puerto Rico
O: 18OCT2021 02:51:31 20.2S 70.5W ML=4.1 EMSC OFFSHORE TARAPACA, CHILE
P: 14OCT2021 138066 20.0S 70.0W 4.0-5.9 BAAAA So. Peru/Bolivia
O: 17OCT2021 15:42:32 21.7N 101.0W ML=4.0 EMSC GUANAJUATO, MEXICO
P: 17OCT2021 137864 18.0N 101.0W 3.5-5.2 ACAAA Michoacan, Mexico
O: 17OCT2021 16:56:42 24.1S 67.2W mb=4.0 EMSC SALTA, ARGENTINA
O: 17OCT2021 07:29:43 24.0S 67.0W mb=4.4 EMSC SALTA, ARGENTINA
P: 17OCT2021 138060 24.0S 68.0W 4.0-5.4 AAAAA Argentina
O: 17OCT2021 13:04:03 26.0S 71.2W mb=4.4 EMSC OFF COAST OF ATACAMA, CHILE
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 BCAAA Coast Central Chile
O: 17OCT2021 16:14:22 50.6S 73.2W mb=4.4 EMSC SANTA CRUZ, ARGENTINA
AFRICA AND EUROPE
O: 17OCT2021 19:38:13 28.7N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 17OCT2021 23:57:34 28.7N 17.8W ML=4.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 BAAAA Canary Islands
O: 17OCT2021 20:13:30 41.8N 19.8E mb=4.4 EMSC ALBANIA
P: 15OCT2021 137998 41.0N 20.0E 3.0-5.1 AAAAA Romania/NW Turkey
O: 17OCT2021 12:20:54 51.6N 16.2E mb=4.2 EMSC POLAND
P: 16OCT2021 138021 50.0N 12.0E 3.0-4.4 ABCAA No. Germany
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 18OCT2021 07:26:52 13.7S 167.0E Mw=6.1 EMSC VANUATU
P: 14OCT2021 138059 15.0S 167.0E 4.0-5.4 BBAAA Vanuatu Islands
O: 17OCT2021 15:57:33 14.9S 168.0E mb=4.9 EMSC VANUATU
P: 14OCT2021 138059 15.0S 167.0E 4.0-5.4 BAAAA Vanuatu Islands
O: 18OCT2021 06:24:15 25.6S 180.0E mb=4.8 EMSC SOUTH OF FIJI ISLANDS
P: 19OCT2021 138069 23.0S 179.0E 4.0-5.4 ACAAA Tonga/Fiji
O: 17OCT2021 07:38:47 11.9S 167.0E mb=4.4 EMSC SANTA CRUZ ISLANDS
P: 15OCT2021 138059 11.0S 165.0E 4.0-5.4 AABAA Vanuatu Islands
OCEAN RIDGES
O: 17OCT2021 20:37:01 79.6N 4.4E mb=4.7 EMSC GREENLAND SEA
ZEALANDIA AND AUSTRALIA REGION
O: 17OCT2021 09:05:36 33.4S 178.8E ML=4.1 EMSC SOUTH OF KERMADEC ISLANDS
P: 18OCT2021 138076 32.0S 179.0E 4.0-5.5 ABAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 17OCT2021 21:59:51 28.7N 138.2E Mw=5.1 EMSC BONIN ISLANDS, JAPAN REGION
P: 19OCT2021 137879 28.0N 140.0E 4.0-5.4 AABAA Bonin Islands
O: 18OCT2021 02:01:22 38.3N 141.5E mb=4.6 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 17OCT2021 137928 38.0N 140.0E 4.0-5.4 AAAAA Off East Coast Honshu
O: 17OCT2021 15:49:31 41.0N 142.2E mb=4.8 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 17OCT2021 137975 40.0N 142.0E 3.5-5.6 AAAAA Hokkaido, Japan
NEIC reported this earthquake of M 4.8 in Hokkaido, Japan was felt with intensity II-III in the area(s) of Hokkaido, Japan at Misawa.
O: 17OCT2021 17:39:15 49.2N 156.0E mb=5.2 EMSC KURIL ISLANDS
O: 17OCT2021 15:17:04 49.3N 156.0E mb=4.5 EMSC KURIL ISLANDS
O: 17OCT2021 16:47:59 49.4N 155.9E mb=4.5 EMSC KURIL ISLANDS
O: 17OCT2021 12:05:17 49.2N 156.0E mb=5.0 EMSC KURIL ISLANDS
P: 14OCT2021 138003 49.0N 153.0E 3.5-5.4 BAAAA So. Kurils
P: 18OCT2021 138019 51.0N 157.0E 4.0-5.8 ABAAA Kamchatka
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 17OCT2021 18:04:27 30.8N 114.5W ML=3.6 EMSC GULF OF CALIFORNIA
O: 17OCT2021 09:37:43 30.1N 114.1W ML=3.5 EMSC GULF OF CALIFORNIA
P: 15OCT2021 137930 31.0N 114.3W 2.5-4.7 AAAAA So. California
O: 18OCT2021 03:58:44 33.3N 116.1W Ml=2.3 EMSC SOUTHERN CALIFORNIA
P: 15OCT2021 137932 32.8N 116.0W 2.5-4.7 BAAAA So. California
O: 17OCT2021 20:17:14 34.0N 117.2W Ml=2.5 EMSC GREATER LOS ANGELES AREA, CALI
P: 14OCT2021 137936 33.7N 117.5W 2.5-4.6 BAAAA 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 Orange.
O: 17OCT2021 19:34:03 37.6N 118.9W Md=2.1 EMSC LONG VALLEY AREA, CALIFORNIA
P: 15OCT2021 137896 37.3N 118.3W 2.5-4.9 AAAAA California/Nevada area
O: 17OCT2021 13:46:03 36.2N 117.9W Ml=2.3 EMSC CENTRAL CALIFORNIA
O: 17OCT2021 16:07:40 36.2N 117.9W Ml=2.4 EMSC CENTRAL CALIFORNIA
O: 17OCT2021 17:15:32 36.2N 117.9W Ml=2.1 EMSC CENTRAL CALIFORNIA
O: 17OCT2021 21:41:06 36.2N 117.9W Ml=2.7 EMSC CENTRAL CALIFORNIA
O: 18OCT2021 00:41:49 36.2N 117.9W Ml=2.5 EMSC CENTRAL CALIFORNIA
O: 17OCT2021 13:18:59 36.2N 117.9W Mw=4.0 EMSC CENTRAL CALIFORNIA
P: 15OCT2021 137894 36.1N 118.1W 2.5-4.7 AAAAA California/Nevada area
O: 17OCT2021 14:53:10 38.8N 122.8W Md=2.4 EMSC NORTHERN CALIFORNIA
O: 18OCT2021 07:09:59 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA
O: 17OCT2021 08:27:14 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 16OCT2021 137901 38.9N 122.8W 2.5-4.6 AAAAA Central California
ALASKA
O: 17OCT2021 19:32:22 55.1N 157.6W ML=3.2 EMSC ALASKA PENINSULA
O: 17OCT2021 19:27:07 55.1N 157.7W mb=4.7 EMSC ALASKA PENINSULA
O: 18OCT2021 01:34:47 56.3N 156.6W ml=3.0 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 AAAAA Alaska Peninsula
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 18OCT2021 02:42:00 45.4N 121.7W Ml=2.5 EMSC MOUNT HOOD AREA, OREGON
P: 19OCT2021 137997 45.3N 121.7W 2.0-4.0 AAAAA Oregon state, U.S.
O: 18OCT2021 07:35:38 65.3N 132.9W MB=4.4 ECAN ELSA, YT
O: 18OCT2021 07:35:38 65.3N 132.9W ML=4.4 EMSC NORTHERN YUKON TERRITORY, CANA
P: 15OCT2021 138044 66.0N 130.0W 2.5-4.1 BAAAA Yukon Territory, Canada
ROCKY MOUNTAINS REGION
O: 18OCT2021 06:31:37 44.3N 115.2W Ml=2.3 EMSC SOUTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 AAAAA Montana/Idaho
O: 17OCT2021 19:33:57 45.6N 115.6W Ml=2.4 EMSC NORTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 ABAAA Montana/Idaho
O: 18OCT2021 00:27:33 31.6N 104.6W ML=2.9 EMSC WESTERN TEXAS
O: 17OCT2021 16:58:41 31.7N 104.0W ML=3.0 EMSC WESTERN TEXAS
O: 17OCT2021 19:00:10 31.7N 104.0W ML=3.5 EMSC WESTERN TEXAS
O: 18OCT2021 04:14:41 31.7N 104.0W ML=2.6 EMSC WESTERN TEXAS
EASTERN U.S./CANADA
O: 17OCT2021 07:01:56 33.9N 82.4W Md=2.0 EMSC GEORGIA, USA
P: 17OCT2021 137953 34.0N 85.0W 2.0-3.9 AABAA Southeast U.S.
O: 18OCT2021 05:33:00 35.1N 95.4W ML=2.1 EMSC OKLAHOMA
P: 17OCT2021 137955 36.0N 97.0W 2.0-4.1 AAAAA Southern Plains
HAWAII
O: 17OCT2021 22:58:40 19.2N 155.4W ML=3.5 EMSC ISLAND OF HAWAII, HAWAII
O: 17OCT2021 15:52:11 19.2N 155.5W ML=3.8 ANSS ISLAND OF HAWAII, HAWAII
O: 17OCT2021 15:52:11 19.2N 155.5W ML=4.0 EMSC ISLAND OF HAWAII, HAWAII
O: 18OCT2021 05:34:56 19.2N 155.5W ML=3.4 EMSC ISLAND OF HAWAII, HAWAII
O: 17OCT2021 09:44:32 18.9N 155.5W ML=3.1 EMSC HAWAII REGION, HAWAII
P: 12OCT2021 137858 18.9N 155.4W 3.0-4.6 BAAAA Hawaii
NEIC reported the earthquake of M 3.3 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Naalehu, Captain Cook and Kailua Kona.
MODERATE QUAKE SHAKES CAYMAN ISLANDS AND CUBA
EARTHQUAKE SUMMARY FOR OCTOBER 16, 2021
A series of moderate earthquakes struck the area near the Caribbean today. These events occurred as an M 5.3 in the Cayman Islands; an M 5.1 in the North Atlantic and an M 4.9 in the Trinidad and Tobago area.
The earthquake of M 5.3 was felt with intensity II-III in the area of the Cayman Islands south of Cuba at George Town, Bodden Town, and West Bay and possibly in southern Cuba. This was the strongest earthquake in the world today following a similar quiet global lull in seismicity yesterday. This appears to be the strongest aftershock of the M 7.7 and 6.1 in the Cayman Islands of January 28, 2020 and the M 7.6 to the southwest of this on January 10, 2018. Forecast 137586 had expected today's event within about 50 km was likely around October 8. This epicenter is near 105 degrees from the M 7.2 in Vanuatu of October 2, 2021 and may have been promoted by energy from that source.
O: 16OCT2021 18:27:29 18.7N 81.7W Mw=5.3 EMSC CAYMAN ISLANDS REGION
P: 8OCT2021 137586 19.0N 81.0W 3.5-5.4 CAAAA Caribbean Sea
An earthquake of M 5.1 also hit east of the event in the Cayman Islands in the North Atlantic Ocean today. It was not reported felt in this remote area. The lsat earthquake within about 200 km of this epicenter with M>=4.9 as an M 6.3 on November 11, 2018 followed by aftershocks of M 5.5-5.6 on November 17 and 27, 2018. An event of M 5.5 occurred about 250 km southeast of today's epicenter on May 17, 2021. Forecast 137865 had expected today's event in the Mid-Atlantic around October 16.
O: 16OCT2021 22:56:15 15.5N 50.0W mb=5.1 EMSC NORTH ATLANTIC OCEAN
P: 16OCT2021 137865 17.0N 47.0W 4.0-5.5 ABCAA Mid-Atlantic Ridge
An M 4.9 also hit the southern Caribbean in the Tobago region of Trinidad and Tobago. NEIC reported an earthquake of M 4.9 in Trinidad and Tobago was felt with intensity II-III in the area(s) of Trinidad and Tobago at Scarborough. This is the strongest event within about 250 km of this epicenter since a similar M 4.9 on May 4, 2020, an aftershocks of an M 5.2 on April 7, 2020. Forecast 137877 had expected today's event in this region was likely around October 20.
O: 16OCT2021 07:07:45 11.6N 60.1W mb=4.9 EMSC TOBAGO REGION, TRINIDAD-TOBAGO
P: 20OCT2021 137877 11.0N 63.0W 3.4-5.3 BACAA Windward Islands
The strongest earthquake in the U.S. or Canada today was an M 4.6-4.9 in Southern Alaska. NEIC reported it was felt with intensity IV in Alaska at Ninilchik and III in Clam Gulch, Kasilof, Anchor Point, Soldotna, Sterling, Home, Kenai, Cooper Landing and the West Kenai Peninsula. The last earthquakes within about 150 km of this epicenter in the Kenai Peninsula of Alaska with M>=4.9 occurred on November 5, 2017 with M 5.0 and M 5.1. Forecasts 138031 and 130833 had expected today's event within about 25 km in mid-October.
O: 16OCT2021 17:47:22 60.1N 151.5W mb=4.9 EMSC KENAI PENINSULA, ALASKA
P: 13OCT2021 138033 60.2N 151.7W 3.2-5.2 BAAAA Central Alaska
P: 15OCT2021 138031 60.0N 153.5W 3.2-5.4 AAAAA Central Alaska
An earthquake of M 4.9 occurred in the south Atlantic-Indian Ridge southwest of Africa today. It was not reported felt in this remote area. A similar M 5.3 hit the area on August 29, 2021 within tens of km of today's epicenter. A series of events of M 4.9-5.2 hit about 200 km east of this in May, 2021. Forecast 137811 had expected today's activity in early to mid-October. This epicenter is near 103 degrees from the M 7.2 in Haiti of August 14, 2021 and the M 7.2 in Vanuatu of October 2, 2021 and may have been promoted by energy from that source.
O: 16OCT2021 17:33:17 52.4S 13.5E mb=4.9 EMSC SOUTHWEST OF AFRICA
P: 6OCT2021 137811 53.0S 19.0E 4.0-5.4 CACAA Atlantic-Indian Ridge
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: 16OCT2021 15:35:02 21.1N 121.2E mb=4.8 EMSC TAIWAN REGION
P: 15OCT2021 137890 22.0N 122.0E 4.0-5.4 AAAAA Taiwan
O: 16OCT2021 22:24:30 28.2N 84.9E ML=4.3 EMSC NEPAL
P: 18OCT2021 137966 30.0N 83.0E 3.8-5.4 ABBAA Xizang
O: 16OCT2021 11:46:02 30.9N 56.5E mb=4.8 EMSC CENTRAL IRAN
O: 16OCT2021 12:59:19 31.0N 56.5E ML=4.0 EMSC CENTRAL IRAN
P: 14OCT2021 137950 31.0N 57.0E 3.8-5.5 AAAAA So. Iran
O: 16OCT2021 21:42:14 41.4N 83.8E mb=4.4 EMSC SOUTHERN XINJIANG, CHINA
P: 15OCT2021 137978 41.0N 82.0E 4.0-5.6 AABAA Kirgizstan/Xinjiang
O: 16OCT2021 12:50:57 55.9N 113.5E mb=4.0 EMSC BURYATIYA, RUSSIA
P: 9OCT2021 137741 56.0N 110.0E 3.0-4.5 CABAA So. Siberia
INDONESIA AND PHILIPPINES
O: 16OCT2021 11:13:10 0.5S 131.4E ML=4.0 EMSC NEAR N COAST OF PAPUA, INDONES
P: 19OCT2021 137848 3.0S 130.0E 4.0-5.5 BCBAA West Irian, PNG
O: 16OCT2021 10:08:28 0.8N 126.2E mb=4.6 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 ACAA Mindanao, Philippines
O: 17OCT2021 05:49:02 2.4N 128.5E mb=4.3 EMSC HALMAHERA, INDONESIA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 AACAA Mindanao, Philippines
O: 17OCT2021 05:18:51 4.6S 153.0E mb=4.8 EMSC NEW IRELAND REGION, P.N.G.
P: 15OCT2021 137836 6.0S 150.0E 4.0-5.6 ABCAA New Ireland
O: 16OCT2021 07:43:00 5.8S 130.6E mb=4.4 EMSC BANDA SEA
P: 17OCT2021 137849 6.0S 131.0E 4.0-5.4 AAAAA West Irian, PNG
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 17OCT2021 05:52:49 7.0N 82.6W mb=4.2 EMSC SOUTH OF PANAMA
O: 17OCT2021 04:58:06 6.3N 82.6W mb=4.5 EMSC SOUTH OF PANAMA
P: 13OCT2021 137821 8.0N 82.0W 3.5-5.1 BBAAA Costa Rica
O: 16OCT2021 13:23:30 9.4N 84.8W ML=4.0 EMSC COSTA RICA
P: 16OCT2021 137852 10.0N 84.0W 3.5-5.5 AAAAA Caribbean Sea
O: 16OCT2021 07:07:45 11.6N 60.1W mb=4.9 EMSC TOBAGO REGION, TRINIDAD-TOBAGO
P: 20OCT2021 137877 11.0N 63.0W 3.4-5.3 BACAA Windward Islands
O: 16OCT2021 12:53:40 11.7S 77.7W mb=4.4 EMSC NEAR COAST OF CENTRAL PERU
P: 13OCT2021 138049 13.0S 77.0W 4.0-5.8 BBAAA Central Peru
NEIC reported this earthquake of M 4.4 in Central Peru was felt with intensity II-III in the area(s) of Central Peru at Lima and San Luis.
O: 16OCT2021 18:27:40 13.4N 90.4W ML=4.1 EMSC OFFSHORE GUATEMALA
P: 14OCT2021 137855 13.0N 89.0W 3.5-5.3 AAAAA Coast of Central America
O: 16OCT2021 14:16:58 13.7N 92.2W ML=4.2 EMSC OFFSHORE GUATEMALA
P: 17OCT2021 137854 14.0N 93.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 16OCT2021 15:39:57 16.0N 94.7W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 13OCT2021 137854 17.0N 94.0W 3.5-5.2 BAAAA Chiapas, Mexico
O: 16OCT2021 16:31:23 16.5N 100.7W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 14OCT2021 137864 17.0N 101.0W 3.5-5.3 AAAAA Michoacan, Mexico
O: 16OCT2021 21:52:39 16.6N 98.5W ML=4.0 EMSC GUERRERO, MEXICO
P: 19OCT2021 137870 16.0N 98.0W 3.5-5.4 BAAAA Oaxaca, Mexico
O: 17OCT2021 00:53:11 16.7N 99.6W ML=4.0 EMSC GUERRERO, MEXICO
P: 14OCT2021 137871 17.0N 100.0W 3.5-5.5 BAAAA Oaxaca, Mexico
O: 16OCT2021 07:04:49 18.0N 66.8W Md=3.0 EMSC PUERTO RICO
P: 16OCT2021 137873 19.0N 67.0W 3.4-4.9 AAAAA Puerto Rico
O: 17OCT2021 05:01:25 18.0N 71.7W ML=3.3 EMSC DOMINICAN REPUBLIC
P: 16OCT2021 137874 19.0N 71.0W 3.4-4.9 AAAAA Dominican Republic
O: 17OCT2021 05:34:31 18.3N 73.5W ML=3.5 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 BAAAA Haiti
O: 17OCT2021 02:35:41 18.4N 102.2W ML=4.1 EMSC MICHOACAN, MEXICO
P: 17OCT2021 137864 18.0N 101.0W 3.5-5.2 AAAAA Michoacan, Mexico
O: 16OCT2021 18:27:29 18.7N 81.7W Mw=5.3 EMSC CAYMAN ISLANDS REGION
P: 8OCT2021 137586 19.0N 81.0W 3.5-5.4 CAAAA Caribbean Sea
O: 17OCT2021 06:40:38 19.0N 65.0W Md=3.7 EMSC VIRGIN ISLANDS REGION
O: 17OCT2021 05:57:17 19.0N 65.0W Md=3.5 EMSC VIRGIN ISLANDS REGION
P: 17OCT2021 137859 19.0N 65.0W 3.0-5.2 AAAAA Leeward Islands
O: 16OCT2021 18:45:01 31.7S 72.0W mb=4.7 EMSC OFFSHORE COQUIMBO, CHILE
P: 14OCT2021 138070 33.0S 72.0W 4.0-5.7 BAAAA Central Chile
O: 16OCT2021 18:34:37 36.9S 74.1W mb=4.4 EMSC OFFSHORE BIO-BIO, CHILE
P: 16OCT2021 138071 36.0S 73.0W 4.0-5.6 AAAAA Central Chile
O: 16OCT2021 07:04:24 42.3S 72.3W mb=4.6 EMSC LOS LAGOS, CHILE
P: 13OCT2021 138071 39.0S 73.0W 4.0-5.6 BCAAA Central Chile
AFRICA AND EUROPE
O: 16OCT2021 20:26:25 11.8N 42.3E ML=4.3 EMSC DJIBOUTI
O: 17OCT2021 06:25:37 10.1N 41.5E ML=4.3 EMSC ETHIOPIA
O: 16OCT2021 23:25:41 26.3S 27.5E ML=3.0 EMSC SOUTH AFRICA
P: 17OCT2021 138064 26.0S 28.0E 3.0-4.9 AAAAA Rep. South Africa
O: 16OCT2021 10:54:43 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 16OCT2021 08:57:51 28.6N 17.8W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
SOUTHWEST PACIFIC
O: 16OCT2021 08:20:59 21.2S 178.6W mb=4.1 EMSC FIJI REGION
P: 19OCT2021 138068 22.0S 179.0W 4.0-5.6 BAAAA Tonga Islands
O: 16OCT2021 09:51:15 22.8S 171.0E mb=4.5 EMSC SOUTHEAST OF LOYALTY ISLANDS
P: 15OCT2021 138062 21.0S 170.0E 4.0-5.5 BAAAA Loyalty Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 16OCT2021 22:56:15 15.5N 50.0W mb=5.1 EMSC NORTH ATLANTIC OCEAN
P: 16OCT2021 137865 17.0N 47.0W 4.0-5.5 ABCAA Mid-Atlantic Ridge
O: 16OCT2021 17:33:17 52.4S 13.5E mb=4.9 EMSC SOUTHWEST OF AFRICA
P: 6OCT2021 137811 53.0S 19.0E 4.0-5.4 CACAA Atlantic-Indian Ridge
O: 16OCT2021 13:24:11 58.9S 25.0W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION
P: 12OCT2021 138085 58.0S 26.0W 4.0-5.6 BAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 17OCT2021 02:30:56 30.0S 177.4W mb=5.1 EMSC KERMADEC ISLANDS, NEW ZEALAND
P: 15OCT2021 138072 30.0S 177.0W 4.0-5.6 AAAAA No. Kermadec Islands
O: 16OCT2021 16:05:26 31.3S 177.4W mb=4.9 EMSC KERMADEC ISLANDS REGION
P: 10OCT2021 137803 31.0S 177.0W 4.0-5.4 CAAAA So. Kermadec Islands
P: 15OCT2021 138072 30.0S 177.0W 4.0-5.6 ABAAA No. Kermadec Islands
O: 16OCT2021 14:58:12 32.7S 179.4E ML=4.3 EMSC SOUTH OF KERMADEC ISLANDS
P: 18OCT2021 138076 32.0S 179.0E 4.0-5.5 AAAAA So. Kermadec Islands
O: 16OCT2021 09:11:51 34.2S 179.6E ML=4.3 EMSC SOUTH OF KERMADEC ISLANDS
P: 18OCT2021 138076 32.0S 179.0E 4.0-5.5 ACAAA So. Kermadec Islands
O: 16OCT2021 22:15:12 48.4S 165.1E mb=4.7 EMSC OFF W. COAST OF S. ISLAND, N.Z
O: 16OCT2021 22:15:12 48.3S 164.8E ML=5.1 GEONET Not felt
P: 14OCT2021 138081 45.0S 167.0E 3.0-5.1 ACBAA So. Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 17OCT2021 01:12:40 28.7N 138.2E mb=4.8 EMSC BONIN ISLANDS, JAPAN REGION
P: 17OCT2021 137904 30.0N 139.0E 3.5-5.1 ABAAA Central/So. Honshu Japan
O: 17OCT2021 02:32:06 29.4N 130.7E Mw=5.1 EMSC RYUKYU ISLANDS, JAPAN
P: 17OCT2021 137884 29.0N 130.0E 4.0-5.4 AAAAA Kyushu Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 16OCT2021 08:15:07 30.8N 114.3W ML=3.8 EMSC GULF OF CALIFORNIA
O: 16OCT2021 21:31:00 30.7N 114.1W ML=3.8 EMSC GULF OF CALIFORNIA
P: 15OCT2021 137930 31.0N 114.3W 2.5-4.7 AAAAA So. California
O: 16OCT2021 16:31:29 33.3N 116.0W Ml=2.2 EMSC SOUTHERN CALIFORNIA
P: 14OCT2021 137934 33.7N 116.1W 2.5-4.8 AAAAA So. California
O: 17OCT2021 02:27:34 36.0N 119.8W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 17OCT2021 137898 36.1N 120.1W 2.5-4.8 AAAAA Central California
O: 16OCT2021 07:53:58 36.7N 121.4W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137899 36.8N 121.3W 2.5-4.7 BAAAA Central California
O: 17OCT2021 02:17:06 37.3N 116.6W ml=2.3 EMSC NEVADA
O: 17OCT2021 03:38:02 37.4N 117.1W ml=2.2 EMSC NEVADA
P: 14OCT2021 137895 37.4N 117.2W 2.5-4.5 BAAAA California/Nevada area
O: 16OCT2021 22:55:40 37.5N 118.8W ML=2.5 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137896 37.5N 118.6W 2.5-4.8 BAAAA California/Nevada area
NEIC reported this earthquake of M 3.0 in Mammoth Lakes, Central California was felt with intensity II-III in the area(s) of Mammoth Lakes, Central California and Bishop.
O: 17OCT2021 02:55:02 37.6N 121.7W Md=2.8 EMSC NORTHERN CALIFORNIA
P: 15OCT2021 137900 37.4N 121.8W 2.5-4.7 AAAAA Central California
NEIC reported this earthquake of M 2.8 in Livermore, northern California was felt with intensity II-III in the area(s) of Livermore, northern California at Fremont, Pleasanton, Dublin, Tracy, San Ramon.
O: 16OCT2021 23:38:44 38.2N 117.9W ml=2.1 EMSC NEVADA
P: 15OCT2021 137896 37.3N 118.3W 2.5-4.9 AAAAA California/Nevada area
O: 16OCT2021 21:10:18 38.6N 119.5W Md=2.6 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 AAAAA California/Nevada area
ALASKA
O: 16OCT2021 07:36:58 54.2N 156.1W ML=3.4 EMSC SOUTH OF ALASKA
P: 15OCT2021 138011 54.7N 155.9W 3.5-4.9 AAAAA Alaska Peninsula
O: 16OCT2021 14:30:13 56.3N 156.5W ML=3.2 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 AAAAA Alaska Peninsula
O: 16OCT2021 14:56:11 58.7N 153.1W ML=3.1 EMSC KODIAK ISLAND REGION, ALASKA
P: 15OCT2021 138031 60.0N 153.5W 3.2-5.4 ABAAA Central Alaska
O: 16OCT2021 17:47:22 60.1N 151.5W mb=4.9 EMSC KENAI PENINSULA, ALASKA
P: 13OCT2021 138033 60.2N 151.7W 3.2-5.2 BAAAA Central Alaska
P: 15OCT2021 138031 60.0N 153.5W 3.2-5.4 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
No events of M>=2 were located in the northwestern U.S. or western Canada today.
ROCKY MOUNTAINS REGION
O: 16OCT2021 10:09:33 36.3N 106.8W ML=2.7 EMSC NEW MEXICO
P: 14OCT2021 137905 37.0N 105.2W 2.0-3.9 AABAA Colorado area
NEIC reported this earthquake of M 2.7 in Lindrith, New Mexico was felt with intensity II-III in the area(s) of Lindrith, New Mexico.
O: 17OCT2021 02:19:19 44.3N 115.0W Ml=2.2 EMSC SOUTHERN IDAHO
O: 16OCT2021 21:36:55 44.3N 115.0W Ml=2.1 EMSC SOUTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 AAAAA Montana/Idaho
O: 16OCT2021 23:49:47 45.1N 114.4W Ml=2.8 EMSC SOUTHERN IDAHO
P: 17OCT2021 137982 44.4N 115.1W 2.0-4.0 AAAAA Montana/Idaho
O: 16OCT2021 08:30:50 46.4N 116.6W ML=2.9 EMSC NORTHERN IDAHO
P: 19OCT2021 137984 47.7N 117.4W 2.0-3.9 BBAAA Montana/Idaho
NEIC reported this earthquake of M 2.9 in Northern Idaho was felt with intensity II-III in the area(s) of Northern Idaho at Reubens, Culdesac, Lapwal, Winchester, Lewiston, and in Asotin, Clarkston, Washington.
O: 16OCT2021 22:34:15 31.7N 104.4W ML=2.5 EMSC WESTERN TEXAS
EASTERN U.S./CANADA
O: 16OCT2021 09:06:17 36.1N 89.8W Md=2.1 EMSC SOUTHEASTERN MISSOURI
P: 15OCT2021 137915 36.5N 89.6W 2.0-4.3 AAAAA New Madrid area
O: 16OCT2021 10:09:33 36.3N 106.8W ML=2.7 EMSC NEW MEXICO
P: 14OCT2021 137905 37.0N 105.2W 2.0-3.9 AABAA Colorado area
O: 16OCT2021 21:29:41 36.4N 92.4W Md=2.1 EMSC ARKANSAS
P: 15OCT2021 137915 36.5N 89.6W 2.0-4.3 AABAA New Madrid area
HAWAII
O: 17OCT2021 03:41:53 19.2N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII
P: 17OCT2021 137858 19.4N 155.1W 3.0-4.6 AAAAA Hawaii
NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Hawaii National Park, Naalehu, Volcano and Captain Cook.
QUIET CONDITIONS RETURN TO GLOBAL SEISMICITY
EARTHQUAKE SUMMARY FOR OCTOBER 15, 2021
It was a very quiet day in global seismicity. There were no event of M>=5.2 located in the world in the past day and no significant regional events were identified. Ongoing eruptions in the Canary Islands at Cumbre Viejo, La Palma and in Kiluaea, Hawaii, however continued with considerable energy. The strongest earthquake associated with the La Palma eruption was an M 4.5, the largest to date in this eruption which began in mid-September. This was noted in the previous issue of this summary as:
"The eruption at Cumbre Viejo in La Palma, Canary Islands, Spain continued today at elevated levels. An M 4.4 in the region today was the strongest earthquake in the current eruption and before since an M 5.4 on December 27, 2013. Lava overflowed the cone of Cumbre Viejo today for the first time indicating a further strong eruption is likely. Forecast 137880 had expected today's activity in the Canary Islands within about 50 km around October 14." (October 13-14, 2021)
Forecast 137880 had expected continuing activity in the Canary Islands was likely around October 14.
O: 15OCT2021 17:47:42 28.6N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 10:48:30 28.7N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 16OCT2021 04:41:52 28.7N 17.7W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 07:02:17 28.6N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
The strongest earthquake in the U.S. or Canada today was an M 3.6-3.9 in Hawaii. NEIC reported this earthquake of M 3.6-3.9 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Naalehu, Volcano, Captain Cook, Mountain View, Hilo, Holualoa, Kealakekua, Papaikou, Kailua Kona and Kamuela. This continues active conditions in this area which began with the eruption of Kilauea last month and included a large M 6.2 on October 10. Today's event occurred within minutes of local solar midnight and may have been promoted by high tidal stresses which maximize near this hour. Forecast 137858 had expected today's event within about 25 km around October 17.
O: 15OCT2021 10:03:12 19.2N 155.4W ML=3.9 EMSC ISLAND OF HAWAII, HAWAII
P: 17OCT2021 137858 19.4N 155.1W 3.0-4.6 AAAAA Hawaii
The strongest earthquake in the world today was an M 5.1 in the Kuril Islands. It was not reported felt in this remote area. The only event within about 150 km of this epicenter in the past year was an M 5.3 on August 2, 2021 and an aftershock of M 5.1 on August 10, 2021. The last event with significantly larger magnitude in this area was an M 7.0 on February 13, 2020. Forecast 137975 had expected today's activity in this region around October 16.
O: 16OCT2021 02:02:12 45.8N 149.3E mb=5.1 EMSC KURIL ISLANDS
P: 16OCT2021 137975 44.0N 148.0E 3.5-5.8 ABAAA Hokkaido, Japan
The strongest earthquake in the U.S. or Canada outside Hawaii today was an M 3.4 in Central Alaska. The last earthquake within about 100 km of this epicenter with M>=3.4 was an M 3.4 on August 13 and another on August 3, 2021. An M 4.4 hit this area on July 19, 2021 and these may be regional aftershocks of that event. Forecast 138037 had expected this event within about 50 km was likely around October 16.
O: 15OCT2021 18:46:38 63.3N 150.7W ML=3.4 EMSC CENTRAL ALASKA
P: 16OCT2021 138037 62.9N 150.2W 3.2-5.4 AAAAA Central Alaska
An unusually large M 4.3 occurred in Poland today. NEIC reported this earthquake of M 4.3 in Lubin, Poland was felt with intensity V in the area(s) of Lubin, Poland. The last earthquake in Poland within about 200 km of this epicenter with M>=4.3 was recorded by NEIC as occurring a year ago near today's epicenter on November 19, 2020; the last of larger magnitude was an M 4.9 on July 8, 2020. Forecast 137738 had expected today's event in early October.
O: 16OCT2021 04:01:44 51.6N 16.2E mb=4.3 EMSC POLAND
P: 6OCT2021 137738 51.0N 16.0E 3.0-4.7 CAAAA Poland
P: 16OCT2021 138021 50.0N 12.0E 3.0-4.4 ABCAA No. Germany
QUIET CONDITIONS RETURN TO GLOBAL SEISMICITY
EARTHQUAKE SUMMARY FOR OCTOBER 15, 2021
It was a very quiet day in global seismicity. There were no event of M>=5.2 located in the world in the past day and no significant regional events were identified. Ongoing eruptions in the Canary Islands at Cumbre Viejo, La Palma and in Kiluaea, Hawaii, however continued with considerable energy. The strongest earthquake associated with the La Palma eruption was an M 4.5, the largest to date in this eruption which began in mid-September. This was noted in the previous issue of this summary as:
"The eruption at Cumbre Viejo in La Palma, Canary Islands, Spain continued today at elevated levels. An M 4.4 in the region today was the strongest earthquake in the current eruption and before since an M 5.4 on December 27, 2013. Lava overflowed the cone of Cumbre Viejo today for the first time indicating a further strong eruption is likely. Forecast 137880 had expected today's activity in the Canary Islands within about 50 km around October 14." (October 13-14, 2021)
Forecast 137880 had expected continuing activity in the Canary Islands was likely around October 14.
O: 15OCT2021 17:47:42 28.6N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 10:48:30 28.7N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 16OCT2021 04:41:52 28.7N 17.7W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 07:02:17 28.6N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
The strongest earthquake in the U.S. or Canada today was an M 3.6-3.9 in Hawaii. NEIC reported this earthquake of M 3.6-3.9 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Naalehu, Volcano, Captain Cook, Mountain View, Hilo, Holualoa, Kealakekua, Papaikou, Kailua Kona and Kamuela. This continues active conditions in this area which began with the eruption of Kilauea last month and included a large M 6.2 on October 10. Today's event occurred within minutes of local solar midnight and may have been promoted by high tidal stresses which maximize near this hour. Forecast 137858 had expected today's event within about 25 km around October 17.
O: 15OCT2021 10:03:12 19.2N 155.4W ML=3.9 EMSC ISLAND OF HAWAII, HAWAII
P: 17OCT2021 137858 19.4N 155.1W 3.0-4.6 AAAAA Hawaii
The strongest earthquake in the world today was an M 5.1 in the Kuril Islands. It was not reported felt in this remote area. The only event within about 150 km of this epicenter in the past year was an M 5.3 on August 2, 2021 and an aftershock of M 5.1 on August 10, 2021. The last event with significantly larger magnitude in this area was an M 7.0 on February 13, 2020. Forecast 137975 had expected today's activity in this region around October 16.
O: 16OCT2021 02:02:12 45.8N 149.3E mb=5.1 EMSC KURIL ISLANDS
P: 16OCT2021 137975 44.0N 148.0E 3.5-5.8 ABAAA Hokkaido, Japan
The strongest earthquake in the U.S. or Canada outside Hawaii today was an M 3.4 in Central Alaska. The last earthquake within about 100 km of this epicenter with M>=3.4 was an M 3.4 on August 13 and another on August 3, 2021. An M 4.4 hit this area on July 19, 2021 and these may be regional aftershocks of that event. Forecast 138037 had expected this event within about 50 km was likely around October 16.
O: 15OCT2021 18:46:38 63.3N 150.7W ML=3.4 EMSC CENTRAL ALASKA
P: 16OCT2021 138037 62.9N 150.2W 3.2-5.4 AAAAA Central Alaska
An unusually large M 4.3 occurred in Poland today. NEIC reported this earthquake of M 4.3 in Lubin, Poland was felt with intensity V in the area(s) of Lubin, Poland. The last earthquake in Poland within about 200 km of this epicenter with M>=4.3 was recorded by NEIC as occurring a year ago near today's epicenter on November 19, 2020; the last of larger magnitude was an M 4.9 on July 8, 2020. Forecast 137738 had expected today's event in early October.
O: 16OCT2021 04:01:44 51.6N 16.2E mb=4.3 EMSC POLAND
P: 6OCT2021 137738 51.0N 16.0E 3.0-4.7 CAAAA Poland
P: 16OCT2021 138021 50.0N 12.0E 3.0-4.4 ABCAA No. Germany
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: 16OCT2021 01:46:25 24.3N 93.8E ML=3.7 EMSC MANIPUR, INDIA REGION
P: 15OCT2021 137886 25.0N 95.0E 4.0-5.6 AAAAA Myanmar
O: 16OCT2021 04:21:58 55.7N 162.3E mb=4.0 EMSC NEAR EAST COAST OF KAMCHATKA
P: 20OCT2021 138017 54.0N 162.0E 4.0-5.4 BBAAA E. of Kamchatka
O: 15OCT2021 10:35:41 29.5N 87.8E ML=4.2 EMSC WESTERN XIZANG
P: 18OCT2021 137966 30.0N 83.0E 3.8-5.4 BACAA Xizang
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 15OCT2021 19:48:35 1.5N 97.2E mb=4.5 EMSC NIAS REGION, INDONESIA
P: 16OCT2021 137825 2.0N 97.0E 4.0-5.5 AAAAA Nicobar Islands
O: 15OCT2021 07:44:54 2.6S 129.5E ML=4.2 EMSC SERAM, INDONESIA
P: 15OCT2021 137830 3.0S 129.0E 4.0-5.5 AAAAA Ceram area
O: 15OCT2021 09:03:21 3.9N 126.2E ML=4.3 EMSC KEPULAUAN TALAUD, INDONESIA
P: 20OCT2021 137824 4.0N 125.0E 4.0-5.4 BAAAA Mindanao, Philippines
O: 15OCT2021 23:17:26 4.9S 103.0E mb=4.8 EMSC SOUTHERN SUMATRA, INDONESIA
P: 19OCT2021 137842 6.0S 103.0E 4.0-5.6 BBAAA So. of Sumatera
O: 15OCT2021 17:55:21 5.4N 127.1E mb=4.5 EMSC PHILIPPINE ISLANDS REGION
P: 6OCT2021 137556 5.0N 128.0E 4.0-5.4 CAAAA Halmahera
O: 15OCT2021 23:03:43 6.7S 104.3E ML=4.3 EMSC SUNDA STRAIT, INDONESIA
O: 15OCT2021 20:34:08 6.6S 104.5E ML=4.3 EMSC SUNDA STRAIT, INDONESIA
P: 17OCT2021 137842 6.0S 104.0E 4.0-5.4 AAAAA So. of Sumatera
O: 15OCT2021 19:52:39 7.2S 129.2E ML=4.0 EMSC KEPULAUAN BABAR, INDONESIA
P: 15OCT2021 137849 7.0S 130.0E 4.0-5.4 AAAAA West Irian, PNG
O: 15OCT2021 22:38:33 7.7S 115.4E mb=4.3 EMSC BALI SEA
P: 16OCT2021 137845 8.0S 117.0E 4.0-5.4 AABAA Sumbawa Island area
O: 16OCT2021 04:42:41 7.9N 126.9E ML=4.0 EMSC MINDANAO, PHILIPPINES
O: 15OCT2021 16:54:47 8.8N 126.5E mb=4.9 EMSC MINDANAO, PHILIPPINES
P: 19OCT2021 137823 8.0N 127.0E 4.0-5.4 BAAAA Halmahera
O: 15OCT2021 12:22:56 11.2S 113.1E ML=4.4 EMSC SOUTH OF JAVA, INDONESIA
P: 12OCT2021 137840 9.0S 113.0E 4.0-5.4 BCAAA So. of Bali
O: 15OCT2021 20:18:21 8.3S 115.4E Mw=4.8 EMSC BALI REGION, INDONESIA
P: 16OCT2021 137845 8.0S 117.0E 4.0-5.4 AABAA Sumbawa Island area
CENTRAL AND SOUTH AMERICA
O: 15OCT2021 23:02:47 13.2N 89.3W mb=4.2 EMSC OFFSHORE EL SALVADOR
P: 14OCT2021 137855 13.0N 89.0W 3.5-5.3 AAAAA Coast of Central America
NEIC reported this earthquake of M 4.2 in El Salvador was felt with intensity II-III in the area(s) of El Salvador in Antiguo Cuscatlan and Nueva San Salvador, La Libertad.
O: 15OCT2021 14:51:59 14.4S 76.6W ML=4.0 EMSC NEAR COAST OF CENTRAL PERU
P: 13OCT2021 138049 13.0S 77.0W 4.0-5.8 ABAAA Central Peru
O: 15OCT2021 18:44:34 17.2N 85.1W mb=4.6 EMSC NORTH OF HONDURAS
P: 18OCT2021 137867 17.0N 86.0W 3.5-5.3 BAAAA Nicaragua
O: 16OCT2021 03:46:35 18.4N 73.7W ML=3.3 EMSC HAITI REGION
O: 16OCT2021 04:43:57 18.4N 73.6W ML=3.2 EMSC HAITI REGION
O: 15OCT2021 08:33:20 18.5N 73.7W ML=3.3 EMSC HAITI REGION
O: 16OCT2021 05:30:09 18.5N 73.8W ML=3.2 EMSC HAITI REGION
O: 15OCT2021 07:24:17 18.8N 74.2W mb=4.0 EMSC HAITI REGION
O: 15OCT2021 07:49:54 18.9N 74.0W ML=3.3 EMSC HAITI REGION
O: 15OCT2021 09:18:29 18.9N 74.0W ML=3.4 EMSC HAITI REGION
O: 15OCT2021 09:50:15 18.9N 74.0W ML=3.3 EMSC HAITI REGION
O: 15OCT2021 10:43:28 18.4N 73.6W ML=3.3 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 AAAAA Haiti
NEIC reported this earthquake of M 4.0 in Haiti was felt with intensity II-III in the area(s) of Haiti in Jeremie, Grand Anse and Petit-Trou-de-Nippes.
O: 15OCT2021 19:54:58 19.3N 65.2W Md=3.6 EMSC PUERTO RICO REGION
P: 17OCT2021 137859 19.0N 65.0W 3.0-5.2 AAAAA Leeward Islands
O: 16OCT2021 02:25:59 19.1N 66.5W Md=3.5 EMSC PUERTO RICO REGION
P: 16OCT2021 137873 19.0N 67.0W 3.4-4.9 AAAAA Puerto Rico
O: 15OCT2021 12:19:50 22.4S 70.6W mb=4.3 EMSC OFFSHORE ANTOFAGASTA, CHILE
P: 19OCT2021 138060 23.0S 69.0W 4.0-5.4 BABAA Coast No. Chile
O: 15OCT2021 11:38:30 24.0S 67.0W mb=4.4 EMSC SALTA, ARGENTINA
P: 17OCT2021 138060 24.0S 68.0W 4.0-5.4 AAAAA Argentina
O: 15OCT2021 10:57:36 27.7S 71.2W mb=4.4 EMSC OFFSHORE ATACAMA, CHILE
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 ABAAA Coast Central Chile
O: 16OCT2021 03:37:24 31.7S 72.0W Mw=4.1 EMSC OFFSHORE COQUIMBO, CHILE
O: 15OCT2021 12:15:52 32.3S 71.7W ML=4.0 EMSC OFFSHORE VALPARAISO, CHILE
O: 15OCT2021 12:31:53 32.3S 71.8W ML=4.0 EMSC OFFSHORE VALPARAISO, CHILE
P: 14OCT2021 138070 33.0S 72.0W 4.0-5.7 AAAAA Central Chile
O: 16OCT2021 07:04:24 42.3S 72.3W mb=4.6 EMSC LOS LAGOS, CHILE
P: 13OCT2021 138071 39.0S 73.0W 4.0-5.6 BCAAA Central Chile
O: 15OCT2021 14:39:53 50.3S 72.3W ML=4.1 EMSC SANTA CRUZ, ARGENTINA
NEIC reported an earthquake of M 4.9 in Trinidad and Tobago was felt with intensity II-III in the area(s) of Trinidad and Tobago at Scarborough.
AFRICA AND EUROPE
O: 15OCT2021 17:42:24 10.0N 41.6E mb=4.5 EMSC ETHIOPIA
NEIC reported this earthquake of M 4.5 in Ethiopia was felt with intensity II-III in the area(s) of Ethiopia at Dire Dawa, Jiga, Tajurah.
O: 15OCT2021 15:02:55 27.6S 23.0E ML=3.0 EMSC SOUTH AFRICA
P: 17OCT2021 138064 26.0S 28.0E 3.0-4.9 ABCAA Rep. South Africa
O: 15OCT2021 17:47:42 28.6N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 10:48:30 28.7N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 16OCT2021 04:41:52 28.7N 17.7W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 07:02:17 28.6N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
O: 16OCT2021 00:23:26 0.3S 29.8E mb=4.7 EMSC LAKE EDWARD REGION, UGANDA
P: 7OCT2021 137568 6.0S 30.0E 3.0-4.6 CDAAA Lake Victoria area
NEIC reported this earthquake of M 4.7 in Lake Edward, Uganda was felt with intensity III-IV in the area(s) of Lake Edward, Uganda Bushenyi, Mbarara, Kabale, and Kampala.
O: 15OCT2021 23:25:43 34.9N 26.4E ML=4.1 EMSC CRETE, GREECE
P: 13OCT2021 137906 34.0N 27.0E 3.0-5.6 AAAAA Crete
NEIC reported this earthquake of M 4.1 in Crete was felt with intensity II-III in the area(s) of Crete at Palaikastron.
O: 16OCT2021 04:01:44 51.6N 16.2E mb=4.3 EMSC POLAND
P: 6OCT2021 137738 51.0N 16.0E 3.0-4.7 CAAAA Poland
P: 16OCT2021 138021 50.0N 12.0E 3.0-4.4 ABCAA No. Germany
SOUTHWEST PACIFIC
O: 15OCT2021 17:14:13 19.8S 177.8W mb=4.4 EMSC FIJI REGION
P: 13OCT2021 138068 20.0S 179.0W 4.0-5.4 AAAAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia
today. GeoNet did not report any felt events in the area.
JAPAN AND KURIL ISLANDS
O: 15OCT2021 18:34:30 26.3N 128.3E ML=4.0 EMSC RYUKYU ISLANDS, JAPAN
P: 14OCT2021 137887 28.0N 128.0E 4.0-5.4 ABAAA Ryukyu Islands
O: 16OCT2021 02:02:12 45.8N 149.3E mb=5.1 EMSC KURIL ISLANDS
P: 16OCT2021 137975 44.0N 148.0E 3.5-5.8 ABAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 15OCT2021 07:25:04 31.1N 115.4W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
P: 17OCT2021 137929 31.9N 116.3W 2.5-4.7 AAAAA So. California
O: 16OCT2021 05:52:31 34.9N 119.0W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137943 34.9N 119.0W 2.5-4.7 BAAAA So. California
O: 16OCT2021 04:20:19 35.5N 118.3W Ml=2.7 EMSC CENTRAL CALIFORNIA
P: 15OCT2021 137944 35.6N 118.4W 2.5-4.7 AAAAA So. California
NEIC reported this earthquake of M 2.7 in Caliente, Central California was felt with intensity II-III in the area(s) of Caliente, Central California.
O: 15OCT2021 21:07:48 36.4N 120.9W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 19OCT2021 137898 36.2N 120.8W 2.5-4.8 BAAAA Central California
O: 16OCT2021 06:31:50 38.2N 117.9W ML=2.5 EMSC NEVADA
O: 15OCT2021 12:36:04 38.2N 117.9W ML=3.4 EMSC NEVADA
P: 13OCT2021 137896 37.5N 118.6W 2.5-4.8 AAAAA California/Nevada area
O: 15OCT2021 13:35:40 38.9N 119.2W ml=2.7 EMSC NEVADA
P: 15OCT2021 137897 39.1N 119.6W 2.5-4.4 AAAAA California/Nevada area
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 AAAAA California/Nevada area
O: 15OCT2021 19:54:07 38.9N 123.0W Ml=3.0 EMSC NORTHERN CALIFORNIA
P: 16OCT2021 137901 38.9N 122.8W 2.5-4.6 AAAAA Central 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 in Hopland, Cloverdale, Lakeport, Kelseyville, Ukiah, Healdsburg, Guerneville, Sebastopol, Littleriver and Concord.
O: 16OCT2021 06:18:08 40.0N 123.8W Md=2.0 EMSC NORTHERN CALIFORNIA
P: 17OCT2021 137993 40.2N 124.2W 2.5-4.6 AAAAA Off Coast of No. Calif
ALASKA
O: 15OCT2021 23:58:26 56.2N 156.3W ML=3.1 EMSC ALASKA PENINSULA
O: 16OCT2021 04:27:33 56.3N 156.4W ML=3.1 EMSC ALASKA PENINSULA
O: 15OCT2021 08:18:34 54.5N 161.6W ml=3.4 EMSC ALASKA PENINSULA
P: 16OCT2021 138028 54.5N 161.8W 3.5-5.1 AAAAA Unimak Islands, Aleutians
O: 15OCT2021 17:18:07 56.2N 156.4W ML=3.3 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 BAAAA Alaska Peninsula
O: 15OCT2021 18:46:38 63.3N 150.7W ML=3.4 EMSC CENTRAL ALASKA
P: 16OCT2021 138037 62.9N 150.2W 3.2-5.4 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 15OCT2021 17:30:08 50.5N 130.3W MB=3.3 ECAN Port Hardy, BC
P: 14OCT2021 138016 50.2N 129.8W 3.0-5.2 AAAAA British Colombia
O: 15OCT2021 12:20:26 49.7N 127.1W ML=3.3 EMSC VANCOUVER ISLAND, CANADA REGIO
O: 15OCT2021 12:20:26 49.7N 127.1W MB=3.3 ECAN Gold River, BC
P: 13OCT2021 138005 48.7N 129.0W 2.8-5.1 AABAA Vancouver Island area
ROCKY MOUNTAINS REGION
O: 15OCT2021 19:37:23 31.6N 104.2W ML=2.1 EMSC WESTERN TEXAS
O: 15OCT2021 09:55:05 31.2N 103.4W ML=2.0 EMSC WESTERN TEXAS
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
O: 15OCT2021 10:03:12 19.2N 155.4W ML=3.9 EMSC ISLAND OF HAWAII, HAWAII
P: 17OCT2021 137858 19.4N 155.1W 3.0-4.6 AAAAA Hawaii
NEIC reported this earthquake of M 3.6-3.9 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Naalehu, Volcano, Captain Cook, Mountain View, Hilo, Holualoa, Kealakekua, Papaikou, Kailua Kona and Kamuela.
STRONG QUAKE IN SOLOMON ISLANDS ON GEOMAGNETIC EQUATOR
EARTHQUAKE SUMMARY FOR OCTOBER 14, 2021
Strong seismicity continued today near the geomagnetic equator. This activity included an M 6.4 in the central Solomon Islands and an M 5.5 in the Molucca Sea of Indonesia. This activity follows the strong geomagnetic storm which has now concluded. This summary noted this possibility in previous summaries as:
"The strongest geomagnetic storm in more than three years occurred today. Bright, mostly green aurora were seen throughout most of North America and Asia with this storm. The height of the storm occurred between 09:00 and 10:00 UT. At the same time an M 6.5 occurred in the sub-solar region of Crete, Greece and the Dodecanese Islands. This summary had noted this geomagnetic storm as:
"The geomagnetic field saw major storm conditions today. The AP level was 45. High latitude geomagnetic field saw stormy conditions with AP 60. This is the strongest geomagnetic storm since AP reached 45 on September 1, 2019. The last of greater disturbance occurred on August 26, 2018 when AP reached 76 and high latitude AP reached 90. Enhanced seismicity is likely at higher latitudes and near the geomagnetic equator with this storm in the next several days." (October 12, 2021)
The strongest earthquake in the world today was an M 6.4 in the Central Solomon Islands. NEIC reported it was felt with maximum intensity VII in Honiara, Guadalcanal; VI in Buala Isabel; V in Tulagi; IV in Kirakira and Ulawa, Arawa, and Kokopo, New Britain and in Pranguna, Northern Solomon Islands. This event is directly on the local geomagnetic equator. This is the strongest earthquake within about 200 km of this epicenter since an M 7.0 on November 18, 2015, a regional aftershock of four earthquakes in the area in July and August, 2015. Forecast 137843 had expected today's event within about 50 km was likely around October 16. This event is at 103 degrees from the M 7.2 in Guerrero, Mexico of September 8 and was probably promoted by strong energy from that source.
O: 15OCT2021 02:44:58 8.9S 158.5E Mw=6.4 EMSC SOLOMON ISLANDS
P: 16OCT2021 137843 9.0S 158.0E 4.0-5.4 AAAAA Solomon Islands
A moderately strong earthquake of M 5.5 also occurred in Indonesia in the Molucca Sea where it was felt with intensity II in Bitung, Sulawesi and Ternate Maluku. BMG reported this earthquake with M 5.8 was felt with intensity III in Manado, Bitung, Bolaang Mongondow Timur, Bolaang Mongondow Selatan and II-III in Minahasa, Minahasa Utara, Ternate and Tidore. The M 5.6 occurred within minutes of local solar midnight, a time when tidal and geomagnetic effects maximize and was probably promoted by those stresses. This is probably an aftershock of an M 5.7 on October 11, 2021 and an M 6.1 on June 3, 2021. Forecast 137824 expected today's activity to the north around October 18. This epicenter is at the seventh node (52 degrees) from the M 7.2 in the Vanuatu region of October 2 and was probably promoted by energy from that source.
O: 14OCT2021 15:32:07 1.2N 126.3E mb=4.4 EMSC MOLUCCA SEA
O: 14OCT2021 15:16:29 1.2N 126.2E Mw=5.6 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 BBAAA Mindanao, Philippines
The strongest seismicity in the U.S. or Canada today were events of M 4.3 in the Alaska Peninsula following an M 6.9 in that area three days ago and an M 4.1 in the Rat Islands. Neither of these were reported felt and are not unusual earthquakes at this time. They had been expected in forecasts 138011 and 138024 within about 50 km in mid-October.
O: 14OCT2021 14:09:58 56.3N 156.4W ML=3.0 EMSC ALASKA PENINSULA
O: 14OCT2021 23:50:09 56.3N 156.5W ML=3.4 EMSC ALASKA PENINSULA
O: 15OCT2021 02:45:40 56.3N 156.4W ML=3.1 EMSC ALASKA PENINSULA
O: 15OCT2021 02:50:29 55.2N 157.4W Mw=4.3 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 BAAAA Alaska Peninsula
O: 14OCT2021 21:30:53 51.8N 176.8E mb=4.1 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 17OCT2021 138024 52.0N 177.0E 4.0-5.8 BAAAA Rat Islands
The eruption of Cumbre Viejo in the Canary Islands continued today. This continues the intensification of this eruption which was noted in the previous issue of this summary as:
"The eruption at Cumbre Viejo in La Palma, Canary Islands, Spain continued today at elevated levels. An M 4.4 in the region today was the strongest earthquake in the current eruption and before since an M 5.4 on December 27, 2013. Lava overflowed the cone of Cumbre Viejo today for the first time indicating a further strong eruption is likely. Forecast 137880 had expected today's activity in the Canary Islands within about 50 km around October 14." (October 13-14, 2021)
Note that the M 4.5 today - larger than yesterday's M 4.4 – is now the strongest recent earthquake in the Canary Islands.
O: 14OCT2021 12:38:57 28.7N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 07:02:17 28.6N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
STRONG QUAKE IN SOLOMON ISLANDS ON GEOMAGNETIC EQUATOR
EARTHQUAKE SUMMARY FOR OCTOBER 14, 2021
Strong seismicity continued today near the geomagnetic equator. This activity included an M 6.4 in the central Solomon Islands and an M 5.5 in the Molucca Sea of Indonesia. This activity follows the strong geomagnetic storm which has now concluded. This summary noted this possibility in previous summaries as:
"The strongest geomagnetic storm in more than three years occurred today. Bright, mostly green aurora were seen throughout most of North America and Asia with this storm. The height of the storm occurred between 09:00 and 10:00 UT. At the same time an M 6.5 occurred in the sub-solar region of Crete, Greece and the Dodecanese Islands. This summary had noted this geomagnetic storm as:
"The geomagnetic field saw major storm conditions today. The AP level was 45. High latitude geomagnetic field saw stormy conditions with AP 60. This is the strongest geomagnetic storm since AP reached 45 on September 1, 2019. The last of greater disturbance occurred on August 26, 2018 when AP reached 76 and high latitude AP reached 90. Enhanced seismicity is likely at higher latitudes and near the geomagnetic equator with this storm in the next several days." (October 12, 2021)
The strongest earthquake in the world today was an M 6.4 in the Central Solomon Islands. NEIC reported it was felt with maximum intensity VII in Honiara, Guadalcanal; VI in Buala Isabel; V in Tulagi; IV in Kirakira and Ulawa, Arawa, and Kokopo, New Britain and in Pranguna, Northern Solomon Islands. This event is directly on the local geomagnetic equator. This is the strongest earthquake within about 200 km of this epicenter since an M 7.0 on November 18, 2015, a regional aftershock of four earthquakes in the area in July and August, 2015. Forecast 137843 had expected today's event within about 50 km was likely around October 16. This event is at 103 degrees from the M 7.2 in Guerrero, Mexico of September 8 and was probably promoted by strong energy from that source.
O: 15OCT2021 02:44:58 8.9S 158.5E Mw=6.4 EMSC SOLOMON ISLANDS
P: 16OCT2021 137843 9.0S 158.0E 4.0-5.4 AAAAA Solomon Islands
A moderately strong earthquake of M 5.5 also occurred in Indonesia in the Molucca Sea where it was felt with intensity II in Bitung, Sulawesi and Ternate Maluku. BMG reported this earthquake with M 5.8 was felt with intensity III in Manado, Bitung, Bolaang Mongondow Timur, Bolaang Mongondow Selatan and II-III in Minahasa, Minahasa Utara, Ternate and Tidore. The M 5.6 occurred within minutes of local solar midnight, a time when tidal and geomagnetic effects maximize and was probably promoted by those stresses. This is probably an aftershock of an M 5.7 on October 11, 2021 and an M 6.1 on June 3, 2021. Forecast 137824 expected today's activity to the north around October 18. This epicenter is at the seventh node (52 degrees) from the M 7.2 in the Vanuatu region of October 2 and was probably promoted by energy from that source.
O: 14OCT2021 15:32:07 1.2N 126.3E mb=4.4 EMSC MOLUCCA SEA
O: 14OCT2021 15:16:29 1.2N 126.2E Mw=5.6 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 BBAAA Mindanao, Philippines
The strongest seismicity in the U.S. or Canada today were events of M 4.3 in the Alaska Peninsula following an M 6.9 in that area three days ago and an M 4.1 in the Rat Islands. Neither of these were reported felt and are not unusual earthquakes at this time. They had been expected in forecasts 138011 and 138024 within about 50 km in mid-October.
O: 14OCT2021 14:09:58 56.3N 156.4W ML=3.0 EMSC ALASKA PENINSULA
O: 14OCT2021 23:50:09 56.3N 156.5W ML=3.4 EMSC ALASKA PENINSULA
O: 15OCT2021 02:45:40 56.3N 156.4W ML=3.1 EMSC ALASKA PENINSULA
O: 15OCT2021 02:50:29 55.2N 157.4W Mw=4.3 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 BAAAA Alaska Peninsula
O: 14OCT2021 21:30:53 51.8N 176.8E mb=4.1 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 17OCT2021 138024 52.0N 177.0E 4.0-5.8 BAAAA Rat Islands
The eruption of Cumbre Viejo in the Canary Islands continued today. This continues the intensification of this eruption which was noted in the previous issue of this summary as:
"The eruption at Cumbre Viejo in La Palma, Canary Islands, Spain continued today at elevated levels. An M 4.4 in the region today was the strongest earthquake in the current eruption and before since an M 5.4 on December 27, 2013. Lava overflowed the cone of Cumbre Viejo today for the first time indicating a further strong eruption is likely. Forecast 137880 had expected today's activity in the Canary Islands within about 50 km around October 14." (October 13-14, 2021)
Note that the M 4.5 today - larger than yesterday's M 4.4 – is now the strongest recent earthquake in the Canary Islands.
O: 14OCT2021 12:38:57 28.7N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 07:02:17 28.6N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
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: 14OCT2021 21:10:01 44.2N 120.2E mb=4.4 EMSC EASTERN NEI MONGOL, CHINA
P: 15OCT2021 137985 45.0N 124.0E 3.5-5.4 AACAA NE China
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 14OCT2021 15:32:07 1.2N 126.3E mb=4.4 EMSC MOLUCCA SEA
O: 14OCT2021 15:16:29 1.2N 126.2E Mw=5.6 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 BBAAA Mindanao, Philippines
O: 14OCT2021 16:44:27 0.0N 97.8E ML=4.0 EMSC NIAS REGION, INDONESIA
P: 19OCT2021 137826 1.0N 98.0E 4.0-5.4 BAAAA So. Sumatera
O: 14OCT2021 17:55:54 0.6S 100.5E ML=4.0 EMSC SOUTHERN SUMATRA, INDONESIA
P: 7OCT2021 137578 2.0S 100.0E 4.0-5.5 CBAAA So. of Sumatera
O: 14OCT2021 23:32:39 1.6S 135.7E ML=4.1 EMSC BIAK REGION, INDONESIA
P: 13OCT2021 137846 2.0S 135.0E 4.0-5.5 AAAAA West Irian, PNG
O: 14OCT2021 17:40:26 2.0S 121.0E ML=4.1 EMSC SULAWESI, INDONESIA
P: 10OCT2021 137580 1.0S 122.0E 4.0-5.4 BAAAA Sulawesi area
O: 15OCT2021 03:30:35 3.6N 123.2E mb=4.5 EMSC CELEBES SEA
P: 20OCT2021 137824 4.0N 123.0E 4.0-5.5 BAAAA Mindanao, Philippines
O: 14OCT2021 07:14:34 6.0N 126.0E mb=4.5 EMSC MINDANAO, PHILIPPINES
P: 16OCT2021 137819 7.0N 124.0E 4.0-5.6 AABAA Central Philippines
O: 15OCT2021 03:59:38 6.6S 149.7E ML=4.6 EMSC NEW BRITAIN REGION, P.N.G.
P: 15OCT2021 137836 6.0S 150.0E 4.0-5.6 AAAAA New Ireland
O: 14OCT2021 21:19:05 6.8N 127.3E mb=4.9 EMSC PHILIPPINE ISLANDS REGION
P: 19OCT2021 137823 8.0N 127.0E 4.0-5.4 BBAAA Halmahera
O: 14OCT2021 20:49:18 7.2S 130.1E mb=4.7 EMSC KEP. TANIMBAR REGION, INDONESI
P: 15OCT2021 137849 7.0S 130.0E 4.0-5.4 AAAAA West Irian, PNG
O: 14OCT2021 10:37:41 11.1N 121.8E ML=4.2 EMSC PANAY, PHILIPPINES
P: 18OCT2021 137861 12.0N 122.0E 3.5-5.0 BAAAA Luzon, Philippines
O: 14OCT2021 14:08:37 13.7N 123.2E ML=4.2 EMSC LUZON, PHILIPPINES
P: 14OCT2021 137861 14.0N 122.0E 3.5-5.1 AAAAA Luzon, Philippines
CENTRAL AND SOUTH AMERICA
O: 14OCT2021 17:41 27.6S 70.9W mb=4.1 GUC Atacama at Caldera, Copiapo an
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 ABAAA Coast Central Chile
GUC reported this earthquake was felt with intensity III in Atacama at Caldera, Copiapo and Tierra Amarilla, Chile.
O: 15OCT2021 02:51:45 13.0S 71.5W ML=4.1 EMSC CENTRAL PERU
P: 12OCT2021 138050 15.0S 71.0W 4.0-5.6 BBAAA Central Peru
P: 13OCT2021 138049 13.0S 77.0W 4.0-5.8 AACAA Central Peru
O: 14OCT2021 11:52:25 14.6N 92.6W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO
P: 15OCT2021 137857 15.0N 92.0W 3.5-5.1 AAAAA Guatemala
O: 14OCT2021 15:32:37 15.6N 95.0W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 17OCT2021 137870 15.0N 96.0W 3.5-5.6 BAAAA Oaxaca, Mexico
O: 14OCT2021 15:03:25 15.8N 97.0W ML=4.0 EMSC OAXACA, MEXICO
P: 17OCT2021 137870 15.0N 96.0W 3.5-5.6 BAAAA Oaxaca, Mexico
O: 14OCT2021 12:53:40 16.3N 99.6W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 14OCT2021 137871 17.0N 100.0W 3.5-5.5 AAAAA Oaxaca, Mexico
O: 15OCT2021 01:51:31 16.5S 70.0W mb=4.2 EMSC SOUTHERN PERU
P: 12OCT2021 138056 16.0S 72.0W 4.0-5.6 BABAA So. Peru/Bolivia
O: 14OCT2021 15:06:45 16.7N 99.7W ML=4.0 EMSC GUERRERO, MEXICO
P: 12OCT2021 137871 17.0N 99.0W 3.5-5.5 AAAAA Oaxaca, Mexico
O: 14OCT2021 13:26:10 16.9N 93.9W ML=4.2 EMSC CHIAPAS, MEXICO
P: 13OCT2021 137854 17.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico
O: 15OCT2021 01:29:05 18.0N 67.0W Md=3.0 EMSC PUERTO RICO
P: 16OCT2021 137873 19.0N 67.0W 3.4-4.9 AAAAA Puerto Rico
O: 14OCT2021 09:53:29 18.5N 73.6W ML=3.3 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 AAAAA Haiti
O: 15OCT2021 01:51:37 19.2N 64.4W mb=3.8 EMSC VIRGIN ISLANDS REGION
P: 17OCT2021 137859 19.0N 65.0W 3.0-5.2 AAAAA Leeward Islands
O: 14OCT2021 18:23:03 24.1S 67.5W ML=4.2 EMSC SALTA, ARGENTINA
O: 15OCT2021 03:53:27 24.5S 68.9W mb=4.5 EMSC ANTOFAGASTA, CHILE
P: 17OCT2021 138060 24.0S 68.0W 4.0-5.4 AAAAA Argentina
NEIC reported this earthquake of M 4.5 in Antofagasta, Chile was felt with intensity II-III in the area(s) of Antofagasta, Chile.
O: 14OCT2021 17:41:36 27.6S 71.0W ML=4.3 EMSC OFFSHORE ATACAMA, CHILE
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 ABAAA Coast Central Chile
O: 15OCT2021 05:41:39 31.7S 72.1W mb=4.3 EMSC OFFSHORE COQUIMBO, CHILE
P: 14OCT2021 138070 33.0S 72.0W 4.0-5.7 ABAAA Central Chile
NEIC reported this earthquake of M 4.3 in Valparaiso, Chile was felt with intensity II-III in the area(s) of Valparaiso, Chile at Vina del Mar.
AFRICA AND EUROPE
O: 14OCT2021 12:38:57 28.7N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 15OCT2021 07:02:17 28.6N 17.8W ML=4.5 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
O: 15OCT2021 05:49:28 8.5S 32.2E mb=4.7 EMSC LAKE RUKWA REGION, TANZANIA
P: 7OCT2021 137568 6.0S 30.0E 3.0-4.6 CCBAA Lake Victoria area
NEIC reported this earthquake of M 4.7 in Tanzania was felt with intensity II-III in the area(s) of Tanzania at Matai Rukwa and Mbeya.
SOUTHWEST PACIFIC
O: 15OCT2021 02:44:58 8.9S 158.5E Mw=6.4 EMSC SOLOMON ISLANDS
P: 16OCT2021 137843 9.0S 158.0E 4.0-5.4 AAAAA Solomon Islands
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: 14OCT2021 09:42:45 30.7N 114.2W ML=3.6 EMSC GULF OF CALIFORNIA
P: 15OCT2021 137930 31.0N 114.3W 2.5-4.7 AAAAA So. California
O: 15OCT2021 03:00:17 33.4N 117.0W Ml=2.0 EMSC SOUTHERN CALIFORNIA
O: 15OCT2021 02:04:06 33.4N 117.0W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 14OCT2021 137935 33.9N 116.9W 2.5-4.4 AAAAA So. California
O: 15OCT2021 02:45:15 34.4N 119.4W Ml=2.4 EMSC SOUTHERN CALIFORNIA
P: 13OCT2021 137943 34.9N 119.0W 2.5-4.7 AAAAA So. California
O: 14OCT2021 17:56:25 35.7N 117.5W Ml=2.2 EMSC SOUTHERN CALIFORNIA
O: 15OCT2021 05:14:53 35.6N 117.5W Ml=2.5 EMSC SOUTHERN CALIFORNIA
P: 13OCT2021 137946 35.8N 117.6W 2.5-4.8 AAAAA So. California
NEIC reported this earthquake of M 2.5 in Ridgecrest, California was felt with intensity II-III in the area(s) of Ridgecrest, California.
O: 14OCT2021 23:19:26 36.3N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137899 36.2N 121.8W 2.5-4.9 AAAAA Central California
O: 14OCT2021 07:20:23 38.2N 117.9W ml=2.0 EMSC NEVADA
P: 14OCT2021 137895 37.4N 117.2W 2.5-4.5 AAAAA California/Nevada area
O: 15OCT2021 03:46:03 38.5N 119.5W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 AAAAA California/Nevada area
O: 15OCT2021 00:04:32 39.1N 115.7W ml=3.6 EMSC NEVADA
P: 6OCT2021 137633 38.7N 115.4W 2.5-4.8 CAAAA California/Nevada area
ALASKA
O: 14OCT2021 14:09:58 56.3N 156.4W ML=3.0 EMSC ALASKA PENINSULA
O: 14OCT2021 23:50:09 56.3N 156.5W ML=3.4 EMSC ALASKA PENINSULA
O: 15OCT2021 02:45:40 56.3N 156.4W ML=3.1 EMSC ALASKA PENINSULA
O: 15OCT2021 02:50:29 55.2N 157.4W Mw=4.3 EMSC ALASKA PENINSULA
P: 18OCT2021 138011 55.7N 157.9W 3.5-4.9 BAAAA Alaska Peninsula
O: 14OCT2021 21:30:53 51.8N 176.8E mb=4.1 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 17OCT2021 138024 52.0N 177.0E 4.0-5.8 BAAAA Rat Islands
O: 14OCT2021 20:16:47 62.0N 150.0W ml=3.0 EMSC SOUTHERN ALASKA
P: 16OCT2021 138037 62.9N 150.2W 3.2-5.4 AAAAA 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 Willow, Wasilla and Anchorage.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 14OCT2021 22:06:39 46.9N 117.4W Ml=2.1 EMSC WASHINGTON
P: 9OCT2021 137701 47.7N 117.4W 2.0-3.9 BAAAA Montana/Idaho
O: 14OCT2021 21:38:14 48.1N 121.9W Md=2.5 EMSC WASHINGTON
P: 15OCT2021 138008 48.9N 122.1W 2.0-4.2 AAAAA Washington state, U.S.
O: 15OCT2021 12:20:26 49.7N 127.1W MB=3.3 ECAN Gold River, BC
O: 14OCT2021 17:53:28 48.9N 128.7W MB=3.7 ECAN Port Alice, BC
P: 13OCT2021 138005 48.7N 129.0W 2.8-5.1 AAAAA Vancouver Island area
ROCKY MOUNTAINS REGION
O: 14OCT2021 23:22:31 31.7N 104.4W ML=2.7 EMSC WESTERN TEXAS
O: 14OCT2021 22:05:10 32.0N 103.9W ML=3.2 EMSC WESTERN TEXAS
O: 14OCT2021 19:14:13 39.4N 110.3W Md=2.0 EMSC UTAH
O: 14OCT2021 21:30:36 39.4N 110.3W Md=2.0 EMSC UTAH
O: 14OCT2021 18:08:01 39.4N 110.3W Ml=2.0 EMSC UTAH
P: 17OCT2021 137963 39.7N 110.8W 2.0-3.9 BAAAA Utah area
O: 14OCT2021 07:51:54 45.6N 111.8W Ml=2.4 EMSC WESTERN MONTANA
P: 15OCT2021 137983 45.7N 112.1W 2.0-4.3 AAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 14OCT2021 21:53:22 35.1N 84.4W Md=2.3 EMSC EASTERN TENNESSEE
P: 17OCT2021 137953 34.0N 85.0W 2.0-3.9 BBAAA Southeast U.S.
HAWAII
No earthquakes of M>=3 were located in Hawaii.
GEOMAGNETIC STORM ACTIVATES GEOMAGNETIC EQUATOR AND HIGH LATITUDES
EARTHQUAKE SUMMARY FOR OCTOBER 13, 2021
The strongest geomagnetic storm in nearly three years was described in the previous issue of this summary was followed today by moderate and unusual earthquakes near the geomagnetic equator in Vanuatu (M 5.6), the Banda Sea, Indonesia (M 5.0) and in Southern Argentina (M 5.4). The note on this storm in the previous issue of this summary was:
"The strongest geomagnetic storm in more than three years occurred today. Bright, mostly green aurora were seen throughout most of North America and Asia with this storm. The height of the storm occurred between 09:00 and 10:00 UT. At the same time an M 6.5 occurred in the sub-solar region of Crete, Greece and the Dodecanese Islands. This summary had noted this geomagnetic storm as:
"The geomagnetic field saw major storm conditions today. The AP level was 45. High latitude geomagnetic field saw stormy conditions with AP 60. This is the strongest geomagnetic storm since AP reached 45 on September 1, 2019. The last of greater disturbance occurred on August 26, 2018 when AP reached 76 and high latitude AP reached 90. Enhanced seismicity is likely at higher latitudes and near the geomagnetic equator with this storm in the next several days." (October 12, 2021)
The strongest earthquake in the world today was an M 5.6 in central Vanuatu. NEIC reported this earthquake of M 5.6 in Central Vanuatu was felt with intensity II-III in the area(s) of Central Vanuatu a Norsup, Malampa. Vila Shefa; IV in Sola Torba, Luganville and V in Port Olry and Longama Paname. This is probably an aftershock of an M 6.9 north of this on August 18, 2021 Forecast 138059 had expected today's activity was likely within about 50 km of this epicenter around October 14.
O: 14OCT2021 05:51:56 15.0S 167.5E Mw=5.6 EMSC VANUATU
O: 13OCT2021 22:05:03 15.8S 167.9E mb=4.4 EMSC VANUATU
O: 13OCT2021 22:25:57 14.2S 167.4E mb=4.5 EMSC VANUATU
P: 14OCT2021 138059 15.0S 167.0E 4.0-5.4 AAAAA Vanuatu Islands
The most unusual earthquake of the day was an M 5.4 in southern Argentina and Chile in Santa Cruz, Argentina. GUC reported this earthquake was felt with intensity IV in Magallanes and Antartica, Chilena at Torres del Paine and III in Natales, Chile. NEIC reported this earthquake of M 5.4 in the southern Argentina-Chile border was felt with intensity II-III in the area(s) of the southern Argentina-Chile border at Rio Gallegos, Santa Cruz, Argentina. This is the largest earthquake within about 300 km of this epicenter since an M 5.4-5.5 on July 30, 1992 near this same epicenter. That was the only earthquake of M>=5.4 in this area located in the past 30 years. This earthquake is located at the fifth node (72 degrees) from the M 7.2 in Guerrero, Mexico of September 8, 2021 and was probably promoted by energy from that source.
O: 13OCT2021 07:55:30 50.3S 72.1W Mw=5.4 EMSC SANTA CRUZ, ARGENTINA
O: 13OCT2021 07:55 50.3S 72.3W mb=5.4 GUC Magallanes and Antartica, Chil
The strongest earthquake in the U.S. or Canada today was an M 4.2 south of Alaska near the Alaska Peninsula. An M 6.9 hit north of this epicenter two days ago on October 11, 2021 and today's event is probably a regional aftershock of that event. There have been two earthquakes of equal or greater magnitude within about 100 km of today's epicenter in the past year - an M 5.0 a month ago on September 16, 2021 and an M 5.5 on July 29, 2021 with the M 8.2 Alaska Peninsula quake of the same day. Forecast 138011 had expected this activity was likely within about 50 km around October 12.
O: 13OCT2021 11:34:18 55.1N 156.4W mb=4.2 EMSC SOUTH OF ALASKA
P: 12OCT2021 138011 54.7N 156.9W 3.5-5.9 AAAAA Alaska Peninsula
An unusual earthquake of M 5.3 hit the southwest Indian Ridge today. It was not reported felt in this remote area. The last earthquake within about 250 km of today's epicenter of M>=5.3 was an M 5.8 more than a year ago on August 18, 2020 and an M 5.4 on November 7, 2019. This epicenter is located near the antipode of Central California and some seismic enhancement is likely in that area\ in mid-October. This is normal with the most seismic periods in Central California around April 15 and six months later near October 15. Forecast 138075 had expected today's earthquake in this area around October 15. This epicenter is at 101 degrees from the M 7.2 in Vanuatu of October 2, 2021 and was probably promoted by energy from that source. Similar events near 103 degrees from the Vanuatu epicenter occurred today in Peru, Chile, Ecuador.
O: 14OCT2021 03:47:04 36.3S 52.4E mb=5.3 EMSC SOUTHWEST INDIAN RIDGE
P: 15OCT2021 138075 34.0S 55.0E 4.0-5.8 ACBAA So. Indian Ocean
The eruption at Cumbre Viejo in La Palma, Canary Islands, Spain continued today at elevated levels. An M 4.4 in the region today was the strongest earthquake in the current eruption and before since an M 5.4 on December 27, 2013. Lava overflowed the cone of Cumbre Viejo today for the first time indicating a further strong eruption is likely. Forecast 137880 had expected today's activity in the Canary Islands within about 50 km around October 14.
O: 14OCT2021 01:27:58 28.6N 17.8W ML=4.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 13OCT2021 14:33:48 28.6N 17.8W ML=4.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
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: 14OCT2021 00:04:19 33.8N 92.0E mb=4.3 EMSC SOUTHERN QINGHAI, CHINA
P: 9OCT2021 137688 33.0N 92.0E 3.8-5.2 BAAAA Xizang
O: 13OCT2021 20:02:02 55.5N 161.7E mb=4.4 EMSC NEAR EAST COAST OF KAMCHATKA
P: 20OCT2021 138017 54.0N 162.0E 4.0-5.4 CBAAA E. of Kamchatka
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 13OCT2021 08:39:12 2.1N 126.5E ML=4.0 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 BAAAA Mindanao, Philippines
O: 13OCT2021 16:21:54 2.4N 97.7E ML=4.1 EMSC NORTHERN SUMATRA, INDONESIA
P: 16OCT2021 137825 2.0N 97.0E 4.0-5.5 BAAAA Nicobar Islands
O: 13OCT2021 17:48:10 4.3N 123.3E mb=4.4 EMSC CELEBES SEA
P: 20OCT2021 137824 4.0N 123.0E 4.0-5.5 CAAAA Mindanao, Philippines
O: 13OCT2021 09:54:28 4.3S 152.9E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.
P: 6OCT2021 137570 6.0S 151.0E 4.0-5.4 CBBAA New Ireland
O: 13OCT2021 10:51:46 7.2S 130.0E Mw=4.6 EMSC KEP. TANIMBAR REGION, INDONESI
O: 13OCT2021 09:57:27 7.3S 129.5E mb=5.0 EMSC KEPULAUAN BABAR, INDONESIA
P: 15OCT2021 137849 7.0S 130.0E 4.0-5.4 AAAAA West Irian, PNG
CENTRAL AND SOUTH AMERICA
O: 13OCT2021 12:17:30 9.3N 84.2W ML=4.0 EMSC COSTA RICA
P: 16OCT2021 137852 10.0N 84.0W 3.5-5.5 BAAAA Caribbean Sea
O: 13OCT2021 09:07:42 9.3S 78.8W mb=4.6 EMSC NEAR COAST OF NORTHERN PERU
P: 15OCT2021 138049 10.0S 75.0W 3.5-5.4 AACAA Brazil
NEIC reported this earthquake of M 4.6 in northern Peru was felt with intensity IV-V in the area(s) of northern Peru at Chimbote and Trujillo.
O: 13OCT2021 14:21:43 13.7N 91.1W mb=4.8 EMSC OFFSHORE GUATEMALA
P: 15OCT2021 137857 15.0N 92.0W 3.5-5.1 ABAAA Guatemala
O: 14OCT2021 03:22:00 16.2S 73.1W mb=4.5 EMSC NEAR COAST OF SOUTHERN PERU
P: 14OCT2021 138050 15.0S 73.0W 4.0-5.5 ABAAA Central Peru
NEIC reported this earthquake of M 4.5 in Southern Peru was felt with intensity II-III in the area(s) of Southern Peru at Moquegua and Arequipa.
O: 13OCT2021 20:48:18 16.6N 94.3W ML=4.0 EMSC OAXACA, MEXICO
P: 13OCT2021 137854 17.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico
O: 13OCT2021 18:38:21 17.1N 100.4W ML=4.5 EMSC GUERRERO, MEXICO
O: 14OCT2021 01:40:36 16.6N 100.0W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 14OCT2021 137871 17.0N 100.0W 3.5-5.5 AAAAA Oaxaca, Mexico
O: 14OCT2021 04:38:47 18.0N 67.0W Md=3.3 EMSC PUERTO RICO REGION
P: 16OCT2021 137873 19.0N 67.0W 3.4-4.9 AAAAA Puerto Rico
O: 14OCT2021 03:12:56 18.4N 68.2W Ml=4.5 EMSC MONA PASSAGE, DOMINICAN REPUBL
P: 12OCT2021 137872 18.0N 68.0W 3.4-5.1 AAAAA Puerto Rico
NEIC reported this earthquake of M 4.5 in the Dominican Republic was felt with intensity IV-V in the area(s) of the Dominican Republic at Higuey and La Romana and IV in Mayaguyez, Puerto Rico.
O: 13OCT2021 18:35:33 18.5N 73.6W ML=3.1 EMSC HAITI REGION
O: 13OCT2021 08:30:08 18.3N 73.5W ML=3.4 EMSC HAITI REGION
O: 13OCT2021 21:50:05 18.4N 73.6W ML=3.4 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 AAAAA Haiti
O: 13OCT2021 12:06:13 19.9S 69.2W mb=4.1 EMSC TARAPACA, CHILE
P: 14OCT2021 138066 20.0S 70.0W 4.0-5.9 AAAAA So. Peru/Bolivia
NEIC reported this earthquake of M 3.9 in Northern Chile was felt with intensity II-III in the area(s) of Northern Chile in Iquique, Tarapaca.
O: 13OCT2021 22:00:34 24.6S 67.9W mb=4.4 EMSC SALTA, ARGENTINA
P: 9OCT2021 137783 24.0S 67.0W 4.0-5.4 BAAAA Argentina
O: 13OCT2021 07:55:30 50.3S 72.1W Mw=5.4 EMSC SANTA CRUZ, ARGENTINA
AFRICA AND EUROPE
O: 14OCT2021 01:27:58 28.6N 17.8W ML=4.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 13OCT2021 14:33:48 28.6N 17.8W ML=4.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
O: 13OCT2021 18:22:52 36.0N 21.6E ML=4.1 EMSC CENTRAL MEDITERRANEAN SEA
P: 17OCT2021 137916 37.0N 20.0E 3.0-4.5 BAAAA No. Greece
SOUTHWEST PACIFIC
O: 14OCT2021 06:22:00 24.3S 179.6W mb=4.6 EMSC SOUTH OF FIJI ISLANDS
P: 9OCT2021 137792 25.0S 177.0W 4.0-5.6 BABAA Tonga Islands
O: 14OCT2021 05:51:56 15.0S 167.5E Mw=5.6 EMSC VANUATU
O: 13OCT2021 22:05:03 15.8S 167.9E mb=4.4 EMSC VANUATU
O: 13OCT2021 22:25:57 14.2S 167.4E mb=4.5 EMSC VANUATU
P: 14OCT2021 138059 15.0S 167.0E 4.0-5.4 AAAAA Vanuatu Islands
OCEAN RIDGES
O: 13OCT2021 09:49:09 58.6S 25.2W mb=4.9 EMSC SOUTH SANDWICH ISLANDS REGION
P: 12OCT2021 138085 58.0S 26.0W 4.0-5.6 AAAAA So. Sandwich Islands
O: 13OCT2021 17:34:24 62.9S 161.2W mb=4.6 EMSC PACIFIC-ANTARCTIC RIDGE
O: 14OCT2021 03:47:04 36.3S 52.4E mb=5.3 EMSC SOUTHWEST INDIAN RIDGE
P: 15OCT2021 138075 34.0S 55.0E 4.0-5.8 ACBAA So. Indian Ocean
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
O: 13OCT2021 17:01:30 32.4N 133.3E ML=4.1 EMSC SHIKOKU, JAPAN
P: 15OCT2021 137904 34.0N 137.0E 3.5-5.1 ABCAA Central/So. Honshu Japan
O: 13OCT2021 11:22:47 44.1N 146.6E mb=4.3 EMSC KURIL ISLANDS
P: 15OCT2021 138002 45.0N 147.0E 3.5-5.8 AAAAA So. Kurils
O: 13OCT2021 19:30:30 37.7N 141.6E ML=4.0 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 18OCT2021 137927 37.0N 141.0E 4.0-5.4 BAAAA Off East Coast Honshu
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 14OCT2021 01:27:00 35.6N 117.5W Ml=2.1 EMSC SOUTHERN CALIFORNIA
P: 13OCT2021 137946 35.8N 117.6W 2.5-4.8 AAAAA So. California
O: 13OCT2021 16:32:33 38.1N 118.9W Md=2.0 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137896 37.5N 118.6W 2.5-4.8 AAAAA California/Nevada area
O: 13OCT2021 18:21:56 38.1N 119.0W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 13OCT2021 23:23:18 38.6N 119.5W Md=2.4 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 BAAAA California/Nevada area
O: 13OCT2021 21:41:33 38.8N 122.8W Md=2.6 EMSC NORTHERN CALIFORNIA
O: 13OCT2021 09:27:25 38.8N 122.8W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 14OCT2021 137901 38.5N 122.7W 2.5-4.6 AAAAA Central California
NEIC reported this earthquake of M 2.6 in the Geysers, California was felt with intensity II-III in the area(s) of the Geysers, California at Forestville.
O: 13OCT2021 16:17:16 39.5N 123.0W Md=2.4 EMSC NORTHERN CALIFORNIA
P: 17OCT2021 137902 39.3N 123.2W 2.5-4.8 BAAAA Central California
ALASKA
O: 13OCT2021 21:27:20 52.1N 169.2W ml=3.3 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 14OCT2021 138018 51.9N 169.2W 3.5-4.9 AAAAA Fox Islands, Aleutians
O: 13OCT2021 11:34:18 55.1N 156.4W mb=4.2 EMSC SOUTH OF ALASKA
P: 12OCT2021 138011 54.7N 156.9W 3.5-5.9 AAAAA Alaska Peninsula
O: 14OCT2021 01:13:36 59.1N 154.0W ml=3.0 EMSC SOUTHERN ALASKA
P: 15OCT2021 138031 60.0N 153.5W 3.2-5.4 AAAAA Central Alaska
NEIC reported this earthquake of M 3.3 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Homer and Kasilof.
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: 13OCT2021 09:47:41 31.7N 104.5W ML=2.1 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 CAAAA SW U.S.A
O: 13OCT2021 18:02:47 39.4N 110.3W MD=2.0 EMSC UTAH
P: 17OCT2021 137963 39.7N 110.8W 2.0-3.9 BAAAA Utah area
EASTERN U.S./CANADA
O: 10OCT2021 02:46:33 49.2N 67.7W MB=1.7 ECAN Godbout, QC
P: 7OCT2021 137693 49.0N 66.0W 2.0-4.1 BAAAA E. of Maine
O: 9OCT2021 13:28:32 74.4N 69.0W MB=3.5 ECAN Savissivik, nan
P: 19OCT2021 138046 73.3N 73.5W 2.5-4.1 CBBAA Baffin/Davis Strait Canada
O: 9OCT2021 08:23:09 49.1N 66.5W MB=2.7 ECAN Sainte-Anne-des-Monts, QC
P: 7OCT2021 137693 49.0N 66.0W 2.0-4.1 AAAAA E. of Maine
HAWAII
No earthquakes of M>=3 were located in Hawaii.
STRONGEST GEOMAGNETIC STORM IN TWO YEARS BRINGS STRONG QUAKE IN CRETE
EARTHQUAKE SUMMARY FOR OCTOBER 12, 2021
The strongest geomagnetic storm in more than three years occurred today. Bright, mostly green aurora were seen throughout most of North America and Asia with this storm. The height of the storm occurred between 09:00 and 10:00 UT. At the same time an M 6.5 occurred in the sub-solar region of Crete, Greece and the Dodecanese Islands. This summary had noted this geomagnetic storm as:
"The geomagnetic field saw major storm conditions today. The AP level was 45. High latitude geomagnetic field saw stormy conditions with AP 60. This is the strongest geomagnetic storm since AP reached 45 on September 1, 2019. The last of greater disturbance occurred on August 26, 2018 when AP reached 76 and high latitude AP reached 90. Enhanced seismicity is likely at higher latitudes and near the geomagnetic equator with this storm in the next several days." (October 12, 2021)
A strong aftershock of M 6.4 also hit eastern Crete, Greece today. This event was reported with maximum intensity VII in Crete at Sitia; IV in Ierapetra, Iraklion, and II-III in Nea Alikarnassos and Khanion, Greece. Many buildings were damaged including a chapel which collapsed. People fled from their homes during the quake but there were no immediate reports of casualties. After a lull in the geomagnetic storm, it resumed about 07:00 UT on October 12, 2021 with high latitude AP 7 at about 09:00. It is likely that this helped promote the earthquake in Crete at this same time. A strong M 6.0 hit Crete about 200 km west of today's epicenter occurred on September 27, 2021, an earthquake which killed one and did considerable damage, and this may be a regional aftershock of that event. The last earthquake of larger magnitude in Crete occurred on May 2, 2020 with M 6.6, the strongest in the region in the past 30 years. A similar M 6.6 about 200 km northeast of this occurred on July 20, 2017. The only event of M>=6.4 within about 100 km of today's event in the past 30 years was an M 6.4 on July 1, 2009. Today's earthquake in Crete occurred within about an hour of local solar noon and was probably promoted by high tidal stresses which maximize near this hour. Forecasts 137629,m 137893 and 137906 had expected today's event in the region of Crete was likely around October 9-13. This epicenter is at 148 degrees from the M 7.2 in Vanuatu of October 2, 2021 and at 103 degrees from the M 8.1 of August 12. 2021 in the South Sandwich Islands and may have been promoted by energy from those sources.
O: 12OCT2021 09:24:04 35.0N 26.3E Mw=6.4 EMSC CRETE, GREECE
O: 12OCT2021 09:36:28 35.1N 26.3E ML=4.1 EMSC CRETE, GREECE
O: 12OCT2021 09:32:42 35.6N 27.2E ML=4.5 EMSC DODECANESE ISLANDS, GREECE
P: 6OCT2021 137646 35.0N 26.0E 3.0-4.8 CAAAA Crete
P: 12OCT2021 137893 35.0N 25.0E 3.0-4.6 AAAAA Aegean Sea
P: 9OCT2021 137629 37.0N 27.0E 3.0-4.8 BBAAA Aegean Sea
The strongest earthquake in the U.S. or Canada today was an M 4.1 off the west coast of Vancouver, British Columbia, Canada. NEIC reported this earthquake of M 4.1 off western Vancouver, Canada was felt with intensity II-III in the area(s) of British Columbia in Port Alberni and VI in Courtenay. An M 4.3 about 50 km southwest of this occurred on September 21, 2021. These may be aftershocks of an event of M 5.4 on July 22, 2020. Forecast 138005 had expected today's event in the area was likely around October 13.
O: 12OCT2021 14:56:19 49.2N 128.1W mb=4.1 EMSC VANCOUVER ISLAND, CANADA REGIO
P: 13OCT2021 138005 48.7N 129.0W 2.8-5.1 AAAAA Vancouver Island area
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: 13OCT2021 06:02:41 41.9N 83.8E mb=4.4 EMSC SOUTHERN XINJIANG, CHINA
O: 12OCT2021 10:48:37 41.1N 83.4E mb=4.2 EMSC SOUTHERN XINJIANG, CHINA
P: 15OCT2021 137978 41.0N 82.0E 4.0-5.6 BAAAA Kirgizstan/Xinjiang
O: 12OCT2021 14:12:28 51.8N 157.0E mb=4.5 EMSC NEAR EAST COAST OF KAMCHATKA
P: 18OCT2021 138019 51.0N 157.0E 4.0-5.8 CAAAA Kamchatka
INDONESIA AND PHILIPPINES
O: 13OCT2021 03:28:46 0.2S 133.0E ML=4.8 EMSC NEAR N COAST OF PAPUA, INDONES
P: 13OCT2021 137846 2.0S 135.0E 4.0-5.5 ABBAA West Irian, PNG
O: 13OCT2021 06:25:39 4.1S 152.9E Mw=5.6 EMSC NEW BRITAIN REGION, P.N.G.
O: 12OCT2021 18:44:06 5.8S 149.1E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.
P: 15OCT2021 137836 6.0S 150.0E 4.0-5.6 AAAAA New Ireland
NEIC reported this earthquake of M 5.0 in New Britain was felt with intensity II-III in the area(s) of New Britain at Kokopo.
O: 12OCT2021 18:33:29 5.9N 126.4E ML=4.2 EMSC MINDANAO, PHILIPPINES
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 CCAAA Mindanao, Philippines
O: 12OCT2021 15:25:17 7.3S 120.3E mb=4.1 EMSC FLORES SEA
P: 12OCT2021 137832 8.0S 121.0E 4.0-5.4 AAAAA Flores Island area
O: 13OCT2021 05:00:43 9.0S 111.0E mb=4.9 EMSC SOUTH OF JAVA, INDONESIA
P: 16OCT2021 137840 9.0S 111.0E 4.0-5.4 BAAAA So. of Java
NEIC reported this earthquake of M 4.9 in Java, Indonesia was felt with intensity II-III in the area(s) of Java, Indonesia with IV at Pundong, and Surakarta and in Gondang, Prambatan, Yogyakarta, Jaten, Bitar, Kencong, Java.
O: 12OCT2021 20:25:49 9.6S 118.5E ML=4.3 EMSC SUMBAWA REGION, INDONESIA
P: 9OCT2021 137777 11.0S 118.0E 4.0-5.4 BBAAA So. of Indonesia
O: 12OCT2021 15:16:11 9.9N 124.1E ML=4.2 EMSC BOHOL, PHILIPPINES
P: 12OCT2021 137860 10.0N 125.0E 3.5-5.0 AAAAA Luzon, Philippines
CENTRAL AND SOUTH AMERICA
O: 12OCT2021 15:46:58 7.4N 80.6W ML=4.1 EMSC PANAMA
P: 13OCT2021 137821 8.0N 82.0W 3.5-5.1 AABAA Costa Rica
O: 13OCT2021 03:07:30 9.6N 84.8W ML=4.0 EMSC COSTA RICA
O: 13OCT2021 02:54:26 9.6N 84.7W mb=4.7 EMSC COSTA RICA
P: 16OCT2021 137852 10.0N 84.0W 3.5-5.5 BAAAA Caribbean Sea
NEIC reported this earthquake of M 4.7 in Costa Rica was felt with intensity II-III in the area(s) of Costa Rica at Jaco, Paquera, Quepos, Puntareans; in San Jose at Santiago, Santa Ana, Escazu, and in Alajuela at Atenas, Grecia, and Alajuela.
O: 12OCT2021 09:22:05 14.4N 92.2W ML=4.3 EMSC OFFSHORE GUATEMALA
P: 14OCT2021 137854 14.0N 92.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 12OCT2021 15:25:59 15.9N 98.1W ML=4.2 EMSC OFFSHORE OAXACA, MEXICO
P: 12OCT2021 137871 17.0N 99.0W 3.5-5.5 ABAAA Oaxaca, Mexico
O: 13OCT2021 01:01:31 15.4N 96.7W ML=4.3 EMSC OFFSHORE OAXACA, MEXICO
O: 12OCT2021 23:39:48 15.8N 95.8W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
O: 12OCT2021 12:31:22 16.0N 95.2W ML=4.2 EMSC OFFSHORE OAXACA, MEXICO
P: 13OCT2021 137854 17.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico
O: 13OCT2021 05:12:05 16.2N 97.6W ML=4.1 EMSC OAXACA, MEXICO
P: 19OCT2021 137870 16.0N 98.0W 3.5-5.4 CAAAA Oaxaca, Mexico
O: 13OCT2021 05:56:03 16.8N 99.8W ML=4.0 EMSC GUERRERO, MEXICO
O: 12OCT2021 18:28:48 16.5N 99.5W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 14OCT2021 137871 17.0N 100.0W 3.5-5.5 AAAAA Oaxaca, Mexico
O: 12OCT2021 13:30:20 18.3N 74.0W ML=3.4 EMSC HAITI REGION
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 AAAAA Haiti
O: 13OCT2021 02:22:46 19.3N 65.7W Md=3.5 EMSC PUERTO RICO REGION
O: 13OCT2021 02:44:16 19.2N 66.1W Md=3.3 EMSC PUERTO RICO REGION
P: 16OCT2021 137873 19.0N 67.0W 3.4-4.9 BAAAA Puerto Rico
O: 12OCT2021 09:03:59 20.0N 70.3W ML=3.2 EMSC DOMINICAN REPUBLIC REGION
P: 9OCT2021 137613 20.0N 69.0W 3.0-4.5 BAAAA Bahamas/No. Caribbean
O: 12OCT2021 18:01:52 29.4S 71.9W ML=4.0 EMSC OFFSHORE COQUIMBO, CHILE
P: 8OCT2021 137799 30.0S 70.0W 4.0-5.4 BABAA Coast Central Chile
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 AABAA Coast Central Chile
AFRICA AND EUROPE
O: 12OCT2021 07:25:03 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 12OCT2021 15:52:19 28.7N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 12OCT2021 07:16:49 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 AAAAA Canary Islands
O: 12OCT2021 09:24:04 35.0N 26.3E Mw=6.4 EMSC CRETE, GREECE
O: 12OCT2021 09:36:28 35.1N 26.3E ML=4.1 EMSC CRETE, GREECE
O: 12OCT2021 09:32:42 35.6N 27.2E ML=4.5 EMSC DODECANESE ISLANDS, GREECE
P: 6OCT2021 137646 35.0N 26.0E 3.0-4.8 CAAAA Crete
P: 12OCT2021 137893 35.0N 25.0E 3.0-4.6 AAAAA Aegean Sea
O: 12OCT2021 23:48:38 63.8N 22.9W ML=3.2 EMSC ICELAND REGION
P: 18OCT2021 138038 62.0N 23.0W 3.0-4.6 CBAAA Iceland area
O: 12OCT2021 09:36:28 35.1N 26.3E ML=4.1 EMSC CRETE, GREECE
O: 12OCT2021 09:32:42 35.6N 27.2E ML=4.5 EMSC DODECANESE ISLANDS, GREECE
O: 12OCT2021 23:00:20 63.8N 22.9W ML=3.2 EMSC ICELAND REGION
SOUTHWEST PACIFIC
O: 13OCT2021 03:31:22 16.9S 174.3W mb=4.3 EMSC TONGA
P: 16OCT2021 138057 19.0S 174.0W 4.0-5.4 BBAAA Tonga Islands
O: 12OCT2021 17:47:04 24.3S 180.0W mb=4.5 EMSC SOUTH OF FIJI ISLANDS
P: 7OCT2021 137792 25.0S 180.0W 4.0-5.4 BAAAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 12OCT2021 13:38:32 59.8S 26.1W mb=4.8 EMSC SOUTH SANDWICH ISLANDS REGION
O: 13OCT2021 05:24:46 58.8S 25.2W mb=4.8 EMSC SOUTH SANDWICH ISLANDS REGION
P: 12OCT2021 138085 58.0S 26.0W 4.0-5.6 AAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia
today. GeoNet did not report any felt events in the area.
JAPAN AND KURIL ISLANDS
O: 12OCT2021 11:30:30 39.6N 142.5E ML=4.3 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 8OCT2021 137661 38.0N 141.0E 4.0-5.4 BBAAA Off East Coast Honshu
O: 13OCT2021 04:58:34 30.7N 138.6E mb=4.1 EMSC IZU ISLANDS, JAPAN REGION
P: 17OCT2021 137904 30.0N 139.0E 3.5-5.1 BAAAA Central/So. Honshu Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 12OCT2021 19:46:00 30.7N 114.3W ML=3.5 EMSC GULF OF CALIFORNIA
P: 15OCT2021 137930 31.0N 114.3W 2.5-4.7 BAAAA So. California
O: 12OCT2021 19:50:14 33.8N 119.4W ML=3.1 EMSC CHANNEL ISLANDS REG., CALIFORN
O: 12OCT2021 19:50:14 33.8N 119.4W ML=3.3 ANSS CHANNEL ISLANDS REG., CALIFORN
P: 13OCT2021 137943 34.9N 119.0W 2.5-4.7 ABAAA So. California
P: 18OCT2021 137937 33.8N 119.7W 2.5-4.6 CAAAA So. California
NEIC reported this earthquake of M 3.3 in Santa Cruz Island, California was felt with intensity II-III in the area(s) of Santa Cruz Island, California in Port Hueneme, Oxnard, Newbury, Simi Valley, Ojai, Santa Monica and Sherman Oaks.
O: 12OCT2021 11:26:48 35.8N 117.6W Ml=2.3 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137946 35.8N 117.6W 2.5-4.8 AAAAA So. California
O: 13OCT2021 06:36:51 37.6N 118.8W Md=2.0 EMSC CENTRAL CALIFORNIA
P: 13OCT2021 137896 37.5N 118.6W 2.5-4.8 AAAAA California/Nevada area
O: 12OCT2021 17:20:52 38.1N 122.2W Md=2.2 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 13OCT2021 137900 37.7N 121.9W 2.5-4.8 AAAAA Central California
O: 12OCT2021 16:43:23 38.2N 117.9W ml=2.1 EMSC NEVADA
O: 12OCT2021 16:53:58 38.2N 117.8W ML=2.8 EMSC NEVADA
O: 12OCT2021 08:28:37 38.2N 117.9W ML=3.5 EMSC NEVADA
P: 13OCT2021 137972 40.0N 117.9W 2.5-4.9 ABAAA California/Nevada area
O: 12OCT2021 21:30:51 38.8N 122.9W Md=2.0 EMSC NORTHERN CALIFORNIA
O: 12OCT2021 11:14:41 39.1N 123.1W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 14OCT2021 137901 38.5N 122.7W 2.5-4.6 AAAAA Central California
O: 12OCT2021 11:29:01 40.3N 124.7W ML=3.2 EMSC OFFSHORE NORTHERN CALIFORNIA
O: 12OCT2021 11:29:01 40.3N 124.7W ML=3.8 ANSS OFFSHORE NORTHERN CALIFORNIA
P: 13OCT2021 137993 40.7N 124.6W 2.5-4.4 AAAAA Off Coast of No. Calif
NEIC reported this earthquake of M 3.8 off the coast of Northern California was felt with intensity II-III in the area(s) of Northern California at Petrolia, Ferndale, Fortuna, Hydesville, Whitethorn and Arcata.
MAJOR AFTERSHOCK SHAKES ALASKA PENINSULA
EARTHQUAKE SUMMARY FOR OCTOBER 11, 2021
A major aftershock of M 6.9 shook the Alaska Peninsula today. NEIC reported maximum intensity VI in Chignik Lagoon, Alaska and V in Chignik with IV in Port Heiden, South Naknek, King Salmon, Sand Point, Manokotak, and II-III in Kodia, Naknek, and King Cove. This event occurred at the height of the current geomagnetic storm near local solar midnight and was probably promoted by geomagnetic effects from this storm as noted in this and previous issues of this summary:
"The geomagnetic field saw quiet conditions today. The AP level was 13. High latitude geomagnetic field saw stormy conditions with AP 23. Enhanced seismicity is likely at higher latitudes and near the geomagnetic equator with this disturbance in the next several days." (October 10-11, 2021)
Today's earthquake occurred at 156 West longitude. This is the same longitude as the M 6.2 earthquake yesterday in Hawaii. The note in the previous issue of this summary expected this event could follow at this time as:
"While the Alaska Peninsula remained quiet today with only an M 3.2 reported in the area, the area is at the same longitude (156 West) as Hawaii and as noted above in the tidal forecast could see enhanced seismicity and the possibility of a strong earthquake in the next several days. A strong geomagnetic storm at high latitudes would reinforce this possibility." (October 10-11, 2021)
The forecast for this new moon as reported in previous issues of this summary had read:
"The New moon arrived at 11:05 UT on October 6. Longitudes which were at local solar noon at this time are near 15 East while those at local solar midnight are near 165 West longitude. In the west these include most areas of Europe and Africa and in the east the central Aleutians and the Alaska Peninsula, Hawaii and the Tonga-Fiji-Kermadec arc. These area are the most likely to see a strong tidally triggered earthquake in the next week. Other areas may also see tidal triggering. These are most likely to occur near local solar midnight and local solar noon. The possibility of a strong to major earthquake is considered moderate to strong before October 10." (October 4-10, 2021)
As discussed in the previous issue the quake in Alaska was probably promoted by tidal stresses. Not only did it occur near local solar midnight but also at the longitude of maximum tidal stress with that event. The previous issue noted this in regard to Hawaii as:
"Readers should note that Hawaii is located near the longitude of maximum tidal stress with this new moon. The mainshock also occurred as a strong geomagnetic storm was reaching maximum intensity" (October 10-11, 2021)
While today's event is about 150 km northeast of the M 8.2 of July 29 and the M 7.0 of August 14, 2021 it is likely a regional aftershock caused by stress redistribution in the area. Forecast 138011 had expected today's activity about 150 km south of this around October 12. This epicenter is at the fifth node from Haiti where an M 7.2 occurred on August 14, 2021 and was probably promoted by strong energy from that source.
O: 11OCT2021 13:59:30 56.3N 156.6W mb=4.4 EMSC ALASKA PENINSULA
O: 11OCT2021 17:56:23 56.3N 156.5W mb=4.3 EMSC ALASKA PENINSULA
O: 11OCT2021 19:35:56 56.3N 156.5W ML=3.3 EMSC ALASKA PENINSULA
O: 11OCT2021 19:40:24 56.3N 156.6W mb=4.9 EMSC ALASKA PENINSULA
O: 12OCT2021 00:54:11 56.3N 156.6W ML=3.4 EMSC ALASKA PENINSULA
O: 12OCT2021 04:41:22 56.3N 156.7W ml=3.5 EMSC ALASKA PENINSULA
O: 11OCT2021 09:10:24 56.4N 156.7W Mw=6.9 EMSC ALASKA PENINSULA
O: 11OCT2021 09:30:52 56.4N 156.5W ml=3.2 EMSC ALASKA PENINSULA
O: 11OCT2021 09:26:20 56.3N 156.6W ML=3.9 EMSC ALASKA PENINSULA
P: 12OCT2021 138011 54.7N 156.9W 3.5-5.9 ABAAA Alaska Peninsula
A strong aftershock of M 6.4 also hit eastern Crete, Greece today. This event was reported with maximum intensity VII in Crete at Sitia; IV in Ierapetra, Iraklion, and II-III in Nea Alikarnassos and Khanion, Greece. Many buildings were damaged including a chapel which collapsed. People fled from their homes during the quake but there were no immediate reports of casualties. After a lull in the geomagnetic storm, it resumed about 08:00 UT on October 12, 2021 with high latitude AP 6 at about 08:00. It is likely that this helped promote the earthquake in Crete at this same time. A strong M 6.0 hit Crete about 200 km west of today's epicenter on September 27, 2021, an earthquake which killed one and did considerable damage, and this may be a regional aftershock of that event. The last earthquake of larger magnitude in Crete occurred on May 2, 2020 with M 6.6, the strongest in the region in the past 30 years. A similar M 6.6 about 200 km northeast of this occurred on July 20, 2017. The only event of M>=6.4 within about 100 km of today's event in the past 30 years was an M 6.4 on July 1, 2009. Today's earthquake in Crete occurred within about an hour of local solar noon and was probably promoted by high tidal stresses which maximize near this hour. Forecasts 137629,m 137893 and 137906 had expected today’s event in the region of Crete was likely around October 9-13.
O: 12OCT2021 09:24:03 35.2N 26.3E mw=6.4 ANSS SSE of Palekastro Greece
P: 9OCT2021 137629 37.0N 27.0E 3.0-4.8 BBAAA Aegean Sea
P: 12OCT2021 137893 35.0N 25.0E 3.0-4.6 AAAAA Aegean Sea
P: 13OCT2021 137906 34.0N 27.0E 3.0-5.6 ABAAA Crete
A moderately strong M 5.6-5.7 quake shook regions of the Molucca Sea today. NEIC reported it was felt with intensity II-III in Indonesia at Ternate, Bitung, Manado, Ambon, Palu, Sulawesi and Polewali Sulawesi. Forecast 137824 had expected today's seismic enhancement in this area was likely in mid-October. NEIC reported an aftershock of M 5.1 in Molucca, Indonesia was felt with intensity II-III in the area(s) of Molucca, Indonesia at Manado, Sulawesi.
O: 11OCT2021 17:30:31 0.8N 126.1E mb=5.0 EMSC MOLUCCA SEA
O: 11OCT2021 15:27:52 0.9N 126.1E mb=5.1 EMSC MOLUCCA SEA
O: 11OCT2021 12:34:36 0.8N 126.2E Mw=5.6 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 CCAAA Mindanao, Philippines
The antipode of Sumatra, where a large earthquake occurred yesterday, was active today. An M 5.0 was widely felt in Colombia at Floridablanca, Bucaramanga, San Gil, Santander, Paip;a, Guatape, Bogota, Ejido, Retiro, Itagui, Antioquia and Cartagena. Forecast 137820 had expected this earthquake in mid-OCtober within about 25 km.
O: 12OCT2021 04:51:46 6.8N 73.0W mb=5.0 EMSC NORTHERN COLOMBIA
P: 18OCT2021 137820 7.0N 73.0W 4.0-5.5 CAAAA Colombia
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: 11OCT2021 16:24:37 17.4N 77.3E ML=4.1 EMSC RNATAKA-ANDHRA PRADESH, INDIA
O: 12OCT2021 00:31:57 30.4N 94.8E mb=4.5 EMSC EASTERN XIZANG
P: 15OCT2021 137947 30.0N 94.0E 3.5-5.1 BAAAA So. China
O: 11OCT2021 15:40:09 40.2N 75.9E mb=4.2 EMSC SOUTHERN XINJIANG, CHINA
P: 9OCT2021 137697 40.0N 75.0E 4.0-5.6 AAAAA Kirgizstan/Xinjiang
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 11OCT2021 17:30:31 0.8N 126.1E mb=5.0 EMSC MOLUCCA SEA
O: 11OCT2021 15:27:52 0.9N 126.1E mb=5.1 EMSC MOLUCCA SEA
O: 11OCT2021 12:34:36 0.8N 126.2E Mw=5.6 EMSC MOLUCCA SEA
P: 18OCT2021 137824 3.0N 126.0E 4.0-5.4 CCAAA Mindanao, Philippines
O: 11OCT2021 19:17:02 1.1S 97.4E ML=4.1 EMSC SOUTHWEST OF SUMATRA, INDONESI
P: 7OCT2021 137559 1.0N 97.0E 4.0-5.5 BCAAA Nicobar Islands
O: 11OCT2021 22:17:47 3.2S 102.2E ML=4.5 EMSC SOUTHERN SUMATRA, INDONESIA
P: 15OCT2021 137842 6.0S 102.0E 4.0-5.4 BCAAA So. of Sumatera
O: 11OCT2021 23:30:22 6.1N 126.9E mb=5.0 EMSC MINDANAO, PHILIPPINES
P: 6OCT2021 137556 5.0N 128.0E 4.0-5.4 BBAAA Halmahera
NEIC reported this earthquake of M 5.0 in Mindanao, Philippines was felt with intensity II-III in the area(s) of Mindanao, Philippines in Mati.
O: 11OCT2021 07:45:10 7.1S 156.1E mb=4.5 EMSC SOLOMON ISLANDS
P: 6OCT2021 137579 6.0S 155.0E 4.0-5.5 BBAAA Solomon Islands
CENTRAL AND SOUTH AMERICA
O: 11OCT2021 15:13 27.3S 70.6W mb=4.2 GUC Atacama at Copiapo, Diego de A
P: 2OCT2021 137784 29.0S 71.0W 4.0-5.6 CBAAA Coast Central Chile
GUC reported this earthquake was felt with intensity III in Atacama at Copiapo, Diego de Almagro and Tierra Amarilla, Chile.
O: 12OCT2021 00:33:41 0.4N 80.6W ML=4.4 EMSC NEAR COAST OF ECUADOR
P: 7OCT2021 137565 2.0S 80.0W 4.0-5.6 BCAAA Ecuador
O: 12OCT2021 04:51:46 6.8N 73.0W mb=5.0 EMSC NORTHERN COLOMBIA
P: 18OCT2021 137820 7.0N 73.0W 4.0-5.5 CAAAA Colombia
O: 11OCT2021 08:30:08 6.0N 73.3W mb=4.1 EMSC COLOMBIA
P: 2OCT2021 137553 7.0N 73.0W 4.0-5.5 CAAAA Colombia
O: 12OCT2021 04:34:35 9.6S 71.3W mb=4.2 EMSC PERU-BRAZIL BORDER REGION
P: 12OCT2021 137828 11.0S 74.0W 3.5-5.5 ABBAA Brazil
O: 11OCT2021 07:38:58 11.2N 86.9W mb=4.0 EMSC NEAR COAST OF NICARAGUA
P: 10OCT2021 137602 12.0N 87.0W 3.5-5.5 AAAAA Nicaragua
O: 12OCT2021 00:48:50 14.8N 92.4W mb=4.1 EMSC CHIAPAS, MEXICO
P: 14OCT2021 137854 14.0N 92.0W 3.5-5.3 AAAAA Chiapas, Mexico
NEIC reported this earthquake of M 4.1 in Chiapas, Mexico was felt with intensity II-III in the area(s) of Chiapas, Mexico at San Marcos la Laguna Solola, Guatemala.
O: 11OCT2021 07:47:55 15.7S 71.9W ML=4.1 EMSC SOUTHERN PERU
O: 12OCT2021 04:00:04 15.6S 72.2W mb=4.9 EMSC SOUTHERN PERU
P: 12OCT2021 138056 16.0S 72.0W 4.0-5.6 AAAAA So. Peru/Bolivia
O: 11OCT2021 15:13:31 27.3S 70.6W mb=4.3 EMSC ATACAMA, CHILE
P: 14OCT2021 138061 29.0S 70.0W 4.0-5.6 BBAAA Coast Central Chile
NEIC reported this earthquake of M 4.2 in Atacama, Chile was felt with intensity II-III in the area(s) of Atacama, Chile at Copiapo.
O: 11OCT2021 23:30:05 18.1N 68.4W Md=3.8 EMSC MONA PASSAGE, DOMINICAN REPUBL
P: 12OCT2021 137872 18.0N 68.0W 3.4-5.1 AAAAA Puerto Rico
O: 11OCT2021 08:04:31 18.4N 74.0W ML=3.0 EMSC HAITI REGION
P: 7OCT2021 137609 20.0N 74.0W 3.4-4.9 BBAAA Puerto Rico
P: 14OCT2021 137874 19.0N 74.0W 3.4-4.9 BAAAA Haiti
AFRICA AND EUROPE
O: 12OCT2021 01:31:35 28.6N 17.8W ML=4.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 11OCT2021 12:20:53 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
P: 14OCT2021 137880 28.0N 18.0W 4.0-5.5 BAAAA Canary Islands
O: 11OCT2021 12:50:37 34.1N 25.9E mb=4.2 EMSC CRETE, GREECE
P: 8OCT2021 137628 35.0N 24.0E 3.0-4.6 BABAA Aegean Sea
P: 12OCT2021 137893 35.0N 25.0E 3.0-4.6 AAAAA Aegean Sea
O: 11OCT2021 09:26:45 63.9N 22.2W ML=3.7 EMSC ICELAND REGION
P: 18OCT2021 138038 62.0N 23.0W 3.0-4.6 CAAAA Iceland area
SOUTHWEST PACIFIC
O: 12OCT2021 03:59:51 20.0S 169.2E mb=4.5 EMSC VANUATU
P: 9OCT2021 137781 19.0S 170.0E 4.0-5.7 BAAAA Vanuatu Islands
O: 12OCT2021 06:04:10 21.3S 174.5E Mw=5.4 EMSC VANUATU REGION
P: 13OCT2021 138069 21.0S 174.0E 4.0-5.6 AAAAA Tonga/Fiji
O: 11OCT2021 16:35:47 7.5S 128.2E mb=4.4 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 13OCT2021 137827 8.0S 128.0E 4.0-5.6 AAAAA Banda Sea
O: 11OCT2021 16:49:19 16.9S 174.4W mb=4.3 EMSC TONGA
P: 5OCT2021 137779 16.0S 174.0W 4.0-5.6 CAAAA Tonga Islands
OCEAN RIDGES
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 11OCT2021 23:48:20 33.7S 179.1E mb=4.3 EMSC SOUTH OF KERMADEC ISLANDS
P: 4OCT2021 137803 32.0S 179.0E 4.0-5.5 CBAAA So. Kermadec Islands
O: 12OCT2021 01:55:00 40.2S 173.5E mb=4.8 EMSC COOK STRAIT, NEW ZEALAND
O: 12OCT2021 01:55:02 40.3S 173.5E ML=5.3 GEONET Felt with moderate intensity
P: 5OCT2021 137805 40.0S 174.0E 3.0-4.5 CAAAA North Island, N.Z.
P: 8OCT2021 137807 42.0S 173.0E 3.0-4.9 BBAAA So. Island, N.Z.
P: 12OCT2021 138080 41.0S 174.0E 3.0-4.9 AAAAA So. Island, N.Z.
NEIC reported this earthquake of M 4.8 in Cook Strait, New Zealand was felt with intensity II-III in the area(s) of Cook Strait, New Zealand at Opunake (V) and Wanganui, with lesser shaking in Motueka, Stratford, Nelson, Picton, Pakiti, Wellington, Blenheim, Makara and Poirua.
GEONET reported this earthquake of M 5.3 was felt with moderate intensity in Cook Strait and Southern North Island. 17552 people reported feeling this event; 7113 with weak intensity; 6756 with light shaking; 1561 moderate; 101 strong; 5 with severe and 14 with extreme shaking.
JAPAN AND KURIL ISLANDS
O: 12OCT2021 03:35:44 25.4N 126.5E mb=4.9 EMSC RYUKYU ISLANDS, JAPAN
P: 19OCT2021 137887 25.0N 127.0E 4.0-5.6 CAAAA Ryukyu Islands
O: 12OCT2021 03:18:59 30.1N 142.9E mb=5.2 EMSC IZU ISLANDS, JAPAN REGION
P: 7OCT2021 137614 29.0N 142.0E 4.0-5.4 BBAAA Bonin Islands
O: 11OCT2021 23:09:59 48.4N 153.7E Mw=5.8 EMSC KURIL ISLANDS
P: 12OCT2021 137986 49.0N 153.0E 3.5-5.4 AAAAA NE Pacific
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 11OCT2021 23:14:46 35.7N 117.5W ML=2.8 EMSC SOUTHERN CALIFORNIA
P: 7OCT2021 137675 35.9N 117.7W 2.5-4.8 BAAAA So. California
NEIC reported this earthquake of M 3.1 in Ridgecrest, California was felt with intensity II-III in the area(s) of Ridgecrest, California and in Trona.
O: 11OCT2021 19:57:51 31.2N 115.3W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
O: 11OCT2021 21:56:44 31.1N 115.6W ML=3.1 EMSC BAJA CALIFORNIA, MEXICO
P: 9OCT2021 137665 32.0N 116.3W 2.5-4.7 AAAAA So. California
O: 11OCT2021 20:38:55 37.5N 118.5W ml=2.3 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137632 37.4N 118.6W 2.5-4.8 BAAAA California/Nevada area
O: 11OCT2021 20:19:57 38.5N 119.4W Md=2.3 EMSC CENTRAL CALIFORNIA
P: 16OCT2021 137897 38.8N 119.6W 2.5-4.4 BAAAA California/Nevada area
O: 12OCT2021 04:17:36 38.8N 122.7W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 9OCT2021 137641 38.5N 122.7W 2.5-4.7 BAAAA Central California
O: 11OCT2021 19:59:35 39.4N 122.1W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 13OCT2021 137992 40.0N 120.9W 2.5-4.6 AAAAA Northern California
O: 11OCT2021 17:38:14 39.5N 123.0W Md=2.0 EMSC NORTHERN CALIFORNIA
P: 9OCT2021 137641 38.5N 122.7W 2.5-4.7 AAAAA Central California
ALASKA
O: 11OCT2021 18:25:47 51.5N 174.4W mb=4.9 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
P: 12OCT2021 138015 52.2N 173.9W 3.5-4.9 AAAAA Andreanoff Isls, Aleutians
O: 11OCT2021 12:24:48 53.4N 160.0W ml=3.1 EMSC SOUTH OF ALASKA
P: 9OCT2021 137743 54.2N 162.5W 3.5-5.0 AABAA Unimak Islands, Aleutians
O: 11OCT2021 12:04:50 57.3N 146.1W ML=3.3 EMSC GULF OF ALASKA
P: 6OCT2021 137756 55.0N 149.0W 3.0-4.8 BCBAA Northern Alaska
O: 11OCT2021 16:28:29 61.9N 149.3W ML=3.0 EMSC SOUTHERN ALASKA
P: 9OCT2021 137750 61.1N 151.4W 3.2-5.5 AAAAA Central Alaska
O: 11OCT2021 13:59:30 56.3N 156.6W mb=4.4 EMSC ALASKA PENINSULA
O: 11OCT2021 17:56:23 56.3N 156.5W mb=4.3 EMSC ALASKA PENINSULA
O: 11OCT2021 19:35:56 56.3N 156.5W ML=3.3 EMSC ALASKA PENINSULA
O: 11OCT2021 19:40:24 56.3N 156.6W mb=4.9 EMSC ALASKA PENINSULA
O: 12OCT2021 00:54:11 56.3N 156.6W ML=3.4 EMSC ALASKA PENINSULA
O: 12OCT2021 04:41:22 56.3N 156.7W ml=3.5 EMSC ALASKA PENINSULA
O: 11OCT2021 09:10:24 56.4N 156.7W Mw=6.9 EMSC ALASKA PENINSULA
O: 11OCT2021 09:30:52 56.4N 156.5W ml=3.2 EMSC ALASKA PENINSULA
O: 11OCT2021 09:26:20 56.3N 156.6W ML=3.9 EMSC ALASKA PENINSULA
P: 12OCT2021 138011 54.7N 156.9W 3.5-5.9 ABAAA Alaska Peninsula
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: 11OCT2021 22:49:02 31.7N 104.4W mb=2.8 EMSC WESTERN TEXAS
O: 12OCT2021 05:59:13 31.7N 104.4W ML=3.0 EMSC WESTERN TEXAS
O: 11OCT2021 12:48:31 31.7N 104.4W ML=2.2 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 CAAAA SW U.S.A
EASTERN U.S./CANADA
O: 11OCT2021 21:31:42 35.5N 96.8W ML=2.3 EMSC OKLAHOMA
P: 13OCT2021 137954 35.0N 97.0W 2.0-4.1 AAAAA Southern Plains
O: 12OCT2021 00:32:20 36.5N 97.0W ML=2.1 EMSC OKLAHOMA
P: 8OCT2021 137681 37.0N 98.0W 2.0-4.2 AAAAA Southern Plains
HAWAII
O: 11OCT2021 08:00:11 19.3N 155.5W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII
P: 12OCT2021 137858 18.9N 155.4W 3.0-4.6 AAAAA Hawaii
STRONG EARTHQUAKE SHAKES HAWAII
EARTHQUAKE SUMMARY FOR OCTOBER 10, 2021
A strong earthquake of M 6.2 shook most of the state of Hawaii, U.S. today. It was reported with maximum intensity VI in Naalehu; V in Hawaii National Park, Captain Cook, Honaunau, Volcano, Mountain View, IV in Pahala, Holualoa, Pahoa, Kealakekua with lesser shaking as far to the west as Waimea. There have been only two earthquakes in Hawaii with M>=6.2 in the past 30 years – both north of today's epicenter in central and northern Hawaii Island - on May 4, 2018 with M 6.9 and as an M 6.7 on October 15, 2006. Today's earthquake occurred near the Loi'hi Seamount south of Hawaii and is not directly associated with the current major eruption of Kilauea volcano to the north. The shaking caused some doors to open and some items to be thrown from shelves in businesses. No major damage or casualties were reported and a tsunami does not appear to have been generated with this earthquake. The earthquake occurred within minutes of the maximum of a geomagnetic storm at local solar noon and was probably promoted by high tidal stresses associated with the new moon and the geomagnetic storm, which stresses maximize near this hour, as noted in this and previous issues of this summary as:
"The New moon arrived at 11:05 UT on October 6. Longitudes which were at local solar noon at this time are near 15 East while those at local solar midnight are near 165 West longitude. In the west these include most areas of Europe and Africa and in the east the central Aleutians and the Alaska Peninsula, Hawaii and the Tonga-Fiji-Kermadec arc. These areas are the most likely to see a strong tidally triggered earthquake in the next week. Other areas may also see tidal triggering. These are most likely to occur near local solar midnight and local solar noon. The possibility of a strong to major earthquake is considered moderate to strong before October 10." (October 4-10, 2021)
Readers should note that Hawaii is located near the longitude of maximum tidal stress with this new moon. The mainshock also occurred as a strong geomagnetic storm was reaching maximum intensity as noted in this summary:
"The geomagnetic field saw quiet conditions today. The AP level was 9. High latitude geomagnetic field saw active conditions with AP 15. Enhanced seismicity is likely at higher latitudes and near the geomagnetic equator with this disturbance in the next several days." (October 9-10, 2021)
Forecast 137594 had expected enhanced seismicity in Hawaii was likely with the new moon on October 6 within about 50 km of today's epicenter. Today's event was located at the seventh note (52 degrees) from an M 7.0 in Guerrero, Mexico of September 8 and the strong seismicity of March 4 and following in the Kermadec Islands as well as near this distance from the M 7.2 and 6.9 in Vanuatu of early October, 2021.
O: 10OCT2021 21:48:36 18.8N 155.5W ml=6.2 ANSS SSE of Naalehu Hawaii
O: 10OCT2021 21:48:36 19.0N 155.6W Mw=5.7 EMSC HAWAII REGION, HAWAII
O: 10OCT2021 22:45:47 19.0N 155.6W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII
O: 10OCT2021 09:31:49 19.2N 155.5W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII
O: 11OCT2021 01:29:14 19.2N 155.5W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII
O: 10OCT2021 21:53:07 18.9N 155.6W ML=4.3 EMSC HAWAII REGION, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 BAAAA Hawaii
The strong eruption of Cumbre Vieja Volcano in La Palma, Canary Islands, Spain continued at a higher intensity today. This included a partial collapse of the cone causing huge chunks of lava, some the size of three-story building to roll down the slope. The lava reached an industrial complex and destroyed more buildings. So far 1186 buildings have been destroyed in the eruption including nearly all structures in the village of Todoque. The eruption has also covered about 1200 acres of land and caused about 6000 of the islands 80,000 residents to be evacuated according to accounts in Reuters. The strongest earthquake of the day was an M 4.3, matching the strongest event recorded in the current eruption as noted in a previous issue of this summary:
" The strongest earthquake in the current eruption occurred today with M 4.3, also the strongest in the Canary Islands since an M 5.4 on December 27, 2013 following a similar eruptive phase.
The M 4.3 occurred within about an hour of local solar noon and may have been promoted by high tidal stresses with the new moon which maximize near this hour." (October 8, 2021)
Today's activity is located at the seventh node (51-52 degrees) from the M 7.2 in Haiti of August 14, 2021 and was probably promoted by energy from that source.
O: 10OCT2021 09:26:27 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 10OCT2021 21:46:27 28.6N 17.8W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
O: 10OCT2021 13:05:38 28.7N 17.8W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
O: 10OCT2021 07:04:52 28.6N 17.8W ML=3.3 EMSC CANARY ISLANDS, SPAIN REGION
While the Alaska Peninsula remained quiet today with only an M 3.2 reported in the area, the area is at the same longitude (156 West) as Hawaii and as noted above in the tidal forecast could see enhanced seismicity and the possibility of a strong earthquake in the next several days. A strong geomagnetic storm at high latitudes would reinforce this possibility.
O: 11OCT2021 00:16:09 58.1N 154.4W ML=3.2 EMSC ALASKA PENINSULA
P: 9OCT2021 137748 60.1N 153.4W 3.2-5.4 ABAAA Central Alaska
An M 4.8 occurred today in the Reykjanes Ridge south of Iceland. It was not reported felt in this remote area. This epicenter is within about 100 km of the exact antipode of an M 6.1 which hit the Macquarie Island area on October 7. This summary suggested this possibility at the time as:
"The antipode of this epicenter in the Macquarie Island area is in the Reykjanes Ridge, north Atlantic south of Iceland. This area often sees enhanced seismicity following strong earthquakes in Macquarie Island." (October 7-8, 2021)
Forecast 137737 had expected today's event within about 100 km of this epicenter was likely around October 10.
O: 10OCT2021 16:09:34 57.9N 32.7W mb=4.8 EMSC REYKJANES RIDGE
P: 10OCT2021 137737 59.0N 31.0W 4.0-5.8 ABAAA North Mid-Atlantic Ridge
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: 10OCT2021 16:11:25 27.4N 55.3E mb=4.7 EMSC SOUTHERN IRAN
P: 5OCT2021 137624 28.0N 56.0E 3.5-5.1 BAAAA So. Iran/Persian Gulf
O: 10OCT2021 16:29:40 30.4N 94.8E mb=4.7 EMSC EASTERN XIZANG
P: 9OCT2021 137688 33.0N 92.0E 3.8-5.2 ACBAA Xizang
O: 10OCT2021 21:52:04 32.3N 49.6E mb=4.4 EMSC WESTERN IRAN
P: 8OCT2021 137677 34.0N 49.0E 3.8-5.2 ABAAA So. Iran
O: 10OCT2021 15:02:40 30.1N 67.9E mb=4.5 EMSC PAKISTAN
P: 3OCT2021 137662 33.0N 74.0E 3.8-5.3 CCCAA Pakistan
NEIC reported this earthquake of M 4.5 in Pakistan was felt with intensity II-III in the area(s) of Pakistan at Sibi and Quetta, Baluchistan.
O: 10OCT2021 11:39:34 36.5N 70.9E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 6OCT2021 137647 36.0N 69.0E 3.8-5.4 BABAA Hindu Kush/Pakistan
INDONESIA AND PHILIPPINES
O: 10OCT2021 11:32:35 3.4N 123.0E mb=4.5 EMSC CELEBES SEA
P: 7OCT2021 137558 6.0N 124.0E 4.0-5.4 BCAAA Mindanao, Philippines
O: 10OCT2021 10:59:08 5.2N 126.5E ML=4.5 EMSC MINDANAO, PHILIPPINES
P: 6OCT2021 137556 5.0N 128.0E 4.0-5.4 BABAA Halmahera
O: 11OCT2021 03:09:54 9.1S 122.4E mb=4.9 EMSC SAVU SEA
P: 9OCT2021 137768 10.0S 124.0E 4.0-5.5 AABAA Flores Island area
O: 10OCT2021 20:31:51 9.7S 118.6E ML=4.4 EMSC SUMBAWA REGION, INDONESIA
O: 10OCT2021 14:43:02 9.3S 119.5E ML=4.0 EMSC SUMBA REGION, INDONESIA
P: 7OCT2021 137581 8.0S 119.0E 4.0-5.4 BBAAA Sumbawa Island area
P: 9OCT2021 137777 11.0S 118.0E 4.0-5.4 ABBAA So. of Indonesia
O: 11OCT2021 05:32:54 14.9N 96.7E ML=4.8 EMSC ANDAMAN ISLANDS, INDIA REGION
P: 5OCT2021 137585 14.0N 93.0E 4.0-5.6 CACAA Andaman Islands
CENTRAL AND SOUTH AMERICA
O: 11OCT2021 04:32:41 10.9N 85.8W ML=4.0 EMSC COSTA RICA
P: 10OCT2021 137602 12.0N 87.0W 3.5-5.5 ABAAA Nicaragua
O: 10OCT2021 15:05:36 11.7S 71.5W mb=4.5 EMSC CENTRAL PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 ACAAA Central Peru
NEIC reported this earthquake of M 4.5 in Southern Peru was felt with intensity II-III in the area(s) of Southern Peru at Arequipa.
O: 10OCT2021 18:05:38 14.0N 93.3W ML=4.0 EMSC OFF COAST OF CHIAPAS, MEXICO
P: 6OCT2021 137588 16.0N 94.0W 3.5-5.2 BBAAA Chiapas, Mexico
O: 10OCT2021 16:42:46 16.5N 99.6W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO
O: 10OCT2021 11:53:30 16.3N 99.5W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO
P: 8OCT2021 137606 17.0N 100.0W 3.5-5.4 AAAAA Oaxaca, Mexico
O: 10OCT2021 09:23:27 16.6S 72.2W mb=4.5 EMSC NEAR COAST OF SOUTHERN PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 ABAAA Central Peru
O: 10OCT2021 12:41:20 18.3N 74.4W ML=3.5 EMSC HAITI REGION
O: 10OCT2021 10:11:52 18.3N 73.3W ML=3.2 EMSC HAITI REGION
P: 7OCT2021 137609 20.0N 74.0W 3.4-4.9 BBAAA Puerto Rico
O: 10OCT2021 19:55:00 18.8N 66.5W Md=3.0 EMSC PUERTO RICO REGION
P: 5OCT2021 137607 19.0N 67.0W 3.4-5.0 BAAAA Puerto Rico
O: 10OCT2021 10:47:14 19.3N 69.9W ML=3.1 EMSC DOMINICAN REPUBLIC
P: 9OCT2021 137613 20.0N 69.0W 3.0-4.5 AAAAA Bahamas/No. Caribbean
O: 10OCT2021 18:43:22 21.8S 68.3W mb=4.2 EMSC ANTOFAGASTA, CHILE
P: 5OCT2021 137785 21.0S 69.0W 4.0-5.6 BAAAA Coast No. Chile
O: 11OCT2021 02:14:50 22.4S 67.5W mb=4.6 EMSC POTOSI, BOLIVIA
P: 7OCT2021 137783 23.0S 67.0W 4.0-5.4 BAAAA Argentina
O: 10OCT2021 14:03:13 23.9S 67.0W mb=4.3 EMSC JUJUY, ARGENTINA
O: 10OCT2021 23:21:44 23.1S 66.8W mb=4.4 EMSC JUJUY, ARGENTINA
P: 7OCT2021 137783 23.0S 67.0W 4.0-5.4 BAAAA Argentina
P: 9OCT2021 137783 24.0S 67.0W 4.0-5.4 AAAAA Argentina
AFRICA AND EUROPE
O: 10OCT2021 09:26:27 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 10OCT2021 21:46:27 28.6N 17.8W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
O: 10OCT2021 13:05:38 28.7N 17.8W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
O: 10OCT2021 07:04:52 28.6N 17.8W ML=3.3 EMSC CANARY ISLANDS, SPAIN REGION
SOUTHWEST PACIFIC
O: 10OCT2021 15:43:40 17.9S 178.5W mb=4.4 EMSC FIJI REGION
P: 9OCT2021 137779 17.0S 177.0W 4.0-5.7 AABAA Tonga Islands
O: 10OCT2021 07:47:04 20.0S 177.5W mb=4.3 EMSC FIJI REGION
P: 7OCT2021 137780 19.0S 176.0W 4.0-5.6 BABAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 10OCT2021 16:09:34 57.9N 32.7W mb=4.8 EMSC REYKJANES RIDGE
P: 10OCT2021 137737 59.0N 31.0W 4.0-5.8 ABAAA North Mid-Atlantic Ridge
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 10OCT2021 11:02:58 32.0S 179.6E mb=4.2 EMSC KERMADEC ISLANDS REGION
P: 4OCT2021 137803 32.0S 179.0E 4.0-5.5 CAAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 10OCT2021 14:16:15 42.4N 143.1E mb=4.9 EMSC HOKKAIDO, JAPAN REGION
P: 7OCT2021 137694 43.0N 146.0E 3.5-5.7 BABAA Hokkaido, Japan
NEIC reported this earthquake of M 4.9 in Hokkaido, Japan was felt with intensity II-III in the area(s) of Hokkaido, Japan at Wakkanai.
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 10OCT2021 07:21:46 31.4N 114.4W ML=3.0 EMSC GULF OF CALIFORNIA
O: 10OCT2021 07:56:44 31.4N 114.5W ML=3.4 EMSC GULF OF CALIFORNIA
O: 10OCT2021 07:20:21 31.8N 113.7W ML=3.5 EMSC SONORA, MEXICO
O: 10OCT2021 07:19:09 31.4N 114.5W ML=3.2 EMSC GULF OF CALIFORNIA
P: 9OCT2021 137665 32.0N 116.3W 2.5-4.7 AABAA So. California
O: 10OCT2021 23:30:08 36.1N 117.7W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137675 35.9N 117.7W 2.5-4.8 BAAAA So. California
O: 10OCT2021 09:55:04 38.8N 119.6W ml=2.5 EMSC NEVADA
O: 10OCT2021 13:24:25 38.5N 119.5W Md=2.0 EMSC CENTRAL CALIFORNIA
P: 5OCT2021 137635 38.7N 119.7W 2.5-4.5 BAAAA California/Nevada area
O: 11OCT2021 02:52:31 39.5N 123.0W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 9OCT2021 137641 38.5N 122.7W 2.5-4.7 AAAAA Central California
ALASKA
O: 10OCT2021 10:59:22 51.9N 175.0W mb=4.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
P: 5OCT2021 137728 51.3N 176.8W 3.5-4.9 BAAAA Andreanoff Isls, Aleutians
O: 11OCT2021 00:16:09 58.1N 154.4W ML=3.2 EMSC ALASKA PENINSULA
P: 9OCT2021 137748 60.1N 153.4W 3.2-5.4 ABAAA Central Alaska
O: 11OCT2021 06:18:30 63.4N 145.5W mb=3.9 EMSC CENTRAL ALASKA
P: 8OCT2021 137753 63.3N 147.5W 3.2-5.2 BAAAA Central Alaska
O: 10OCT2021 12:05:10 64.7N 149.3W ML=3.2 EMSC CENTRAL ALASKA
P: 8OCT2021 137753 63.3N 147.5W 3.2-5.2 ABAAA Central Alaska
NEIC reported this earthquake of M 3.1 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Delta Junction.
O: 10OCT2021 14:02:15 65.3N 166.2W ML=3.0 EMSC NORTHERN 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: 10OCT2021 13:17:14 31.6N 104.5W ML=3.9 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 CAAAA SW U.S.A
NEIC reported this earthquake of M 3.8 in Western Texas was felt with intensity V in the area(s) of Western Texas Van Horn and Carlsbad, New Mexico.
O: 10OCT2021 19:25:53 44.3N 115.2W ML=2.7 EMSC SOUTHERN IDAHO
P: 8OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
O: 10OCT2021 21:48:36 18.8N 155.5W ml=6.2 ANSS SSE of Naalehu Hawaii
O: 10OCT2021 21:48:36 19.0N 155.6W Mw=5.7 EMSC HAWAII REGION, HAWAII
O: 10OCT2021 22:45:47 19.0N 155.6W ML=3.3 EMSC ISLAND OF HAWAII, HAWAII
O: 10OCT2021 09:31:49 19.2N 155.5W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII
O: 11OCT2021 01:29:14 19.2N 155.5W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII
O: 10OCT2021 21:53:07 18.9N 155.6W ML=4.3 EMSC HAWAII REGION, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 BAAAA Hawaii
STRONG VANUATU QUAKE FOLLOWED BY QUAKE IN CENTRAL PERU
EARTHQUAKE SUMMARY FOR OCTOBER 9, 2021
The strongest earthquake in the world today was an M 6.8 in the region southeast of the Vanuatu Islands. It appears to be an aftershock of the M 7.2 that hit this region on October 2, 2021. Today's event ws felt lightly with intensity II-III in Fiji at Sigatoka, Nadi, Lautoka, Ba, Suba, Isangel, Labasa, Vila, Vanuatu, Yale, and Mont-Dore, New Caledonia. The mainshock had been noted in this summary on October 2 as:
"Today's event of M 7.3 is the strongest recorded within about 200 km of this epicenter in the past 30 years. An M 7.2 hit the area on August 12, 2016 and a larger event of M 7.6 occurred in the area on March 3, 1990 with M 7.6. A major earthquake of M 7.7 and large aftershocks hit the area of the Loyalty Islands on February 10, 2021 about 400 km to the southwest of today's epicenter." (October 2, 2021)
Forecasts 137786 and 137793 had expected today's activity was likely within about 150 km was likely around October 5-7.
O: 9OCT2021 10:58:30 21.2S 174.5E Mw=6.8 EMSC VANUATU REGION
P: 5OCT2021 137793 21.0S 176.0E 4.0-5.8 BAAAA Tonga/Fiji
P: 7OCT2021 137786 22.0S 172.0E 4.0-5.4 AABAA Loyalty Islands
The M 6.8 in the southern Vanuatu region was followed later in the day by an M 5.7 in Central Peru. This event was felt with intensity IV in Cusco Peru a Santa Ana and II-III in Cusco, Ayacucho, Rio Branco, Acre, Brazil and in La Paz, Bolivia. A similar earthquake of M 5.6 occurred in Southern Peru yesterday as noted in the previous issue of this summary:
"An earthquake of M 5.5-5.6 in Southern Peru today was felt with moderate intensity VII in Arequipa, Peru. This was the strongest earthquake in the world today. It occurred on the geomagnetic equator and may have been promoted by the geomagnetic disturbance two days ago. The last earthquake of greater magnitude within about 150 km of this epicenter occurred as an M 6.0 on May 31, 2020. This followed a major quake about 200 km to the northeast of this on March 1, 2019. Forecast 137766 had expected today's event within about 50 km of this epicenter was likely around October 9. This epicenter is at 103-104 degrees from the M 8.1 in the Alaska Peninsula and at M 7.2 in Vanuatu of October 2, 2021 and was probably promoted by energy from those sources. Further aftershocks in the Vanuatu region are expected as the seismic ping-pong effect from Peru is likely." (October 8-9, 2021)
Today's epicenter is also at 105 degrees from the mainshock and aftershock today in the area east of southern Vanuatu and was probably promoted by energy from that source. Further reverberation between the two areas is still possible. Other earthquakes today near 103 degrees from the Vanuatu epicenter occurred in the South Sandwich Islands (M 4.9); Costa Rica (M 4.3), central Peru (M 4.3); Atacama, Chile (M 4.0); Antofagasta Chile (M 4.8). The last earthquake of larger magnitude within about 150 km of today's epicenter was an M 7.1 at a deep focus on August 24, 2018. The last of larger magnitude of shallow focus was an M 6.4 on January 10, 1998. Forecast 137766 had expected enhanced seismicity in Central Chile around October 9.
O: 10OCT2021 00:20:40 11.7S 71.6W Mw=5.7 EMSC CENTRAL PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 ACAAA Central Peru
An earthquake of M 5.6 also occurred in the Sea of Okhotsk, Russia west of the
Kuril Islands today. It was not reported felt in this remote area. This may be an aftershock of an M 5.8 in the Sea of Okhotsk on September 3, 2021. Forecast 137721 had expected regional seismic enhancement in early October.
O: 9OCT2021 07:19:26 50.0N 149.9E Mw=5.6 EMSC SEA OF OKHOTSK
P: 3OCT2021 137721 49.0N 153.0E 3.5-5.6 CACAA So. Kurils
A further earthquake of M 3.6-3.9 occurred today in the current eruption of Kilauea Volcano, Hawaii. NEIC reported today's earthquake was felt with intensity IV in Naalehu and II-III in Volcano, Hilo, Kurtistown and Papaikou, Hawaii. A similar event hit the region yesterday and was reported in this summary as:
"An M 3.7 earthquake in Hawaii continued the eruption of Kilauea today. NEIC reported it was felt with intensity II-III in Hawaii at Pahala, Naalehu, Captain Cook, Holualoa and Kailua Kona. Forecast 137594 expected today's event within the eruptive area was likely around October 6, 2021. This is the strongest earthquake in the U.S. or Canada today. An M 4.5-4.6 hit this area two days ago on October 6 but this is one of the strongest earthquakes to date associated with the current Kilauea eruption." (October 7-8, 2021)
Forecast 137594 had expected today's event within about 25 km of this epicenter was likely around October 6.
O: 9OCT2021 23:08:42 19.2N 155.4W ML=3.9 EMSC ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 BAAAA Hawaii
The strongest earthquake in the U.S. or Canada today was an M 4.0 in the Rat Islands, Aleutians. The last earthquake in the Rat Islands of M>=4 was an M 4.3 on September 20, 2021 but the last within about 140 km of today's epicenter was an M 4.6 on August 24, 2021. Forecast 137740 had expected today's event within about 50 km was likely around October 7.
O: 9OCT2021 15:46:49 51.7N 178.4E mb=4.0 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 7OCT2021 137740 52.0N 178.0E 4.0-5.8 AAAAA Rat Islands
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: 10OCT2021 01:48:58 30.3N 94.8E mb=4.7 EMSC EASTERN XIZANG
P: 9OCT2021 137688 33.0N 92.0E 3.8-5.2 ACBAA Xizang
O: 9OCT2021 20:37:36 32.9N 58.8E ML=4.6 EMSC EASTERN IRAN
P: 10OCT2021 137658 36.0N 52.0E 3.8-5.2 ACCAA No. Iran
O: 9OCT2021 07:19:26 50.0N 149.9E Mw=5.6 EMSC SEA OF OKHOTSK
P: 3OCT2021 137721 49.0N 153.0E 3.5-5.6 CACAA So. Kurils
INDONESIA AND PHILIPPINES
O: 9OCT2021 13:09:05 4.1S 133.9E mb=4.7 EMSC NEAR S COAST OF PAPUA, INDONES
P: 5OCT2021 137582 2.0S 135.0E 4.0-5.6 BCAAA West Irian, PNG
O: 9OCT2021 10:39:14 4.5S 153.4E mb=5.1 EMSC NEW IRELAND REGION, P.N.G.
O: 09OCT2021 20:01:52 4.6S 152.9E mb=5.4 EMSC NEW BRITAIN REGION, P.N.G.
P: 6OCT2021 137579 6.0S 155.0E 4.0-5.5 BBBAA Solomon Islands
NEIC reported these earthquakes of M 5.1 and 5.5 in New Ireland, PNG were felt with intensity II-III in the area(s) of New Ireland, PNG at Namatanal, Kokopo and Kimbe, New Britain.
CENTRAL AND SOUTH AMERICA
O: 10OCT2021 00:20:40 11.7S 71.6W Mw=5.7 EMSC CENTRAL PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 ACAAA Central Peru
O: 9OCT2021 11:10:49 7.9N 77.6W ML=4.1 EMSC PANAMA-COLOMBIA BORDER REGION
P: 4OCT2021 137554 7.0N 82.0W 3.5-5.1 BACAA Costa Rica
O: 9OCT2021 21:29:30 10.2N 86.2W ML=4.3 EMSC OFF COAST OF COSTA RICA
P: 10OCT2021 137602 12.0N 87.0W 3.5-5.5 ABAAA Nicaragua
O: 10OCT2021 00:20:40 11.7S 71.6W Mw=5.7 EMSC CENTRAL PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 ACAAA Central Peru
O: 9OCT2021 08:02:50 12.6S 76.9W ML=4.3 EMSC NEAR COAST OF CENTRAL PERU
P: 6OCT2021 137766 14.0S 76.0W 4.0-5.6 BBAAA Central Peru
O: 9OCT2021 13:23:09 15.0S 73.5W mb=4.3 EMSC CENTRAL PERU
P: 5OCT2021 137766 15.0S 73.0W 4.0-5.6 BAAAA Central Peru
NEIC reported this earthquake of M 4.3 in Southern Peru was felt with intensity II-III in the area(s) of Southern Peru at Puquio, Ayacucho.
O: 09OCT2021 23:11:00 15.6S 72.2W mb=4.4 EMSC SOUTHERN PERU
O: 09OCT2021 07:41:21 15.7S 71.9W ML=4.0 EMSC SOUTHERN PERU
O: 09OCT2021 14:31:22 15.7S 72.3W mb=4.5 EMSC SOUTHERN PERU
O: 10OCT2021 00:46:55 15.7S 71.9W ML=4.0 EMSC SOUTHERN PERU
O: 9OCT2021 17:55:33 15.6S 71.9W mb=4.6 EMSC SOUTHERN PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 AAAAA Central Peru
O: 09OCT2021 08:05:57 14.7N 93.3W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
O: 9OCT2021 09:33:12 15.7N 92.2W mb=4.6 EMSC CHIAPAS, MEXICO
P: 7OCT2021 137592 14.0N 91.0W 3.5-5.2 ABAAA Guatemala
O: 9OCT2021 15:43:08 16.0N 98.4W ML=4.4 EMSC OFFSHORE OAXACA, MEXICO
P: 4OCT2021 137605 16.0N 98.0W 3.5-5.3 BAAAA Oaxaca, Mexico
O: 09OCT2021 08:12:03 18.3N 74.0W ML=3.3 EMSC HAITI REGION
O: 9OCT2021 09:49:29 18.2N 74.1W ML=3.5 EMSC HAITI REGION
P: 7OCT2021 137609 20.0N 74.0W 3.4-4.9 ABAAA Puerto Rico
O: 9OCT2021 23:05:03 18.7N 66.8W Md=3.0 EMSC PUERTO RICO REGION
P: 5OCT2021 137607 19.0N 67.0W 3.4-5.0 BAAAA Puerto Rico
O: 09OCT2021 20:17:40 18.9N 65.3W Md=3.3 EMSC PUERTO RICO REGION
O: 09OCT2021 18:55:10 19.1N 66.0W Md=3.2 EMSC PUERTO RICO REGION
O: 10OCT2021 00:49:32 19.2N 65.9W Md=3.3 EMSC PUERTO RICO REGION
P: 8OCT2021 137596 18.0N 65.0W 3.0-5.3 ABAAA Leeward Islands
O: 9OCT2021 09:52:18 19.6N 92.5W ML=4.3 EMSC BAY OF CAMPECHE
P: 3OCT2021 137589 17.0N 94.0W 3.5-5.3 CCBAA Chiapas, Mexico
O: 9OCT2021 19:25:48 19.9N 70.3W ML=3.0 EMSC DOMINICAN REPUBLIC REGION
P: 6OCT2021 137609 19.0N 71.0W 3.4-4.9 BAAAA Puerto Rico
O: 09OCT2021 07:15:12 21.8S 68.8W mb=4.3 EMSC ANTOFAGASTA, CHILE
O: 9OCT2021 23:33:45 21.2S 68.7W mb=4.8 EMSC ANTOFAGASTA, CHILE
P: 7OCT2021 137782 21.0S 67.0W 4.0-5.9 AABAA Argentina
NEIC reported this earthquake of M 4.8 in northern Chile was felt with intensity II-III in the area(s) of northern Chile at Antofagasta, Calama and Iquique, Tarapaca.
O: 9OCT2021 20:37:02 27.4S 67.3W ML=4.0 EMSC CATAMARCA, ARGENTINA
P: 2OCT2021 137784 28.0S 67.0W 4.0-5.4 CAAAA Argentina
AFRICA AND EUROPE
O: 09OCT2021 20:27:30 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 9OCT2021 09:28:42 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 9OCT2021 21:18:52 35.9N 7.7E mb=4.0 EMSC NORTHERN ALGERIA
P: 3OCT2021 137651 39.0N 14.0E 3.0-4.6 CCCAA Mediterranean/Sicily
SOUTHWEST PACIFIC
O: 10OCT2021 05:04:25 17.5S 175.1W mb=4.3 EMSC TONGA
P: 9OCT2021 137779 17.0S 177.0W 4.0-5.7 AABAA Tonga Islands
O: 9OCT2021 15:45:15 18.0S 178.1W mb=4.4 EMSC FIJI REGION
P: 9OCT2021 137779 17.0S 177.0W 4.0-5.7 AAAAA Tonga Islands
O: 9OCT2021 10:58:30 21.2S 174.5E Mw=6.8 EMSC VANUATU REGION
P: 5OCT2021 137793 21.0S 176.0E 4.0-5.8 BAAAA Tonga/Fiji
P: 7OCT2021 137786 22.0S 172.0E 4.0-5.4 AABAA Loyalty Islands
OCEAN RIDGES
O: 10OCT2021 05:25:39 56.7S 27.5W mb=4.9 EMSC SOUTH SANDWICH ISLANDS REGION
P: 2OCT2021 137813 56.0S 27.0W 4.0-5.7 CAAAA So. Sandwich Islands
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 10OCT2021 05:06:57 30.8S 179.5E ML=4.5 EMSC KERMADEC ISLANDS REGION
P: 4OCT2021 137803 32.0S 179.0E 4.0-5.5 CBAAA So. Kermadec Islands
O: 9OCT2021 10:58:39 35.4S 141.1E ML=2.9 EMSC VICTORIA, AUSTRALIA
P: 28SEP2021 137331 37.0S 142.0E 4.0-5.0 CBAAA Australia
JAPAN AND KURIL ISLANDS
O: 10OCT2021 05:09:30 40.0N 142.3E ML=4.0 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 8OCT2021 137661 38.0N 141.0E 4.0-5.4 ABAAA Off East Coast Honshu
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 9OCT2021 08:58:34 30.8N 114.3W ML=3.5 EMSC GULF OF CALIFORNIA
P: 8OCT2021 137663 30.2N 114.1W 2.0-4.0 AAAAA SW U.S.A
O: 9OCT2021 16:50:05 33.9N 119.1W Ml=2.1 EMSC CHANNEL ISLANDS REG., CALIFORN
P: 7OCT2021 137670 34.0N 118.7W 2.5-4.4 AAAAA So. California
O: 9OCT2021 22:40:32 36.8N 121.5W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 2OCT2021 137638 36.9N 121.7W 2.5-4.5 CAAAA Central California
O: 9OCT2021 19:54:34 36.9N 122.2W ML=2.2 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 7OCT2021 137639 37.2N 122.1W 2.5-4.8 AAAAA 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 Santa Cruz, Felton, Boulder Creek, Seaside and Los Banos.
O: 10OCT2021 02:03:57 37.1N 117.0W ml=2.4 EMSC NEVADA
P: 4OCT2021 137631 37.2N 117.3W 2.5-4.6 CAAAA California/Nevada area
O: 9OCT2021 09:23:35 38.8N 119.1W ml=2.0 EMSC NEVADA
P: 5OCT2021 137635 38.7N 119.7W 2.5-4.5 BAAAA California/Nevada area
O: 09OCT2021 22:51:25 38.8N 122.8W Md=2.6 EMSC NORTHERN CALIFORNIA
O: 10OCT2021 04:38:02 38.8N 122.8W Md=2.7 EMSC NORTHERN CALIFORNIA
O: 9OCT2021 14:07:47 38.8N 122.8W Md=2.0 EMSC NORTHERN CALIFORNIA
P: 9OCT2021 137641 38.5N 122.7W 2.5-4.7 AAAAA Central California
NEIC reported earthquakes of M 2.6 and 2.7 in the Geysers, Northern California were felt with intensity II-III in the area(s) of the Geysers, Northern California at Healdsburg and Kelseyville.
ALASKA
O: 9OCT2021 15:46:49 51.7N 178.4E mb=4.0 EMSC RAT ISLANDS, ALEUTIAN ISLANDS
P: 7OCT2021 137740 52.0N 178.0E 4.0-5.8 AAAAA Rat Islands
O: 10OCT2021 01:21:24 56.7N 149.5W ML=3.4 EMSC GULF OF ALASKA
P: 6OCT2021 137756 55.0N 149.0W 3.0-4.8 BBAAA Northern Alaska
O: 10OCT2021 01:00:22 57.0N 156.2W ML=3.1 EMSC ALASKA PENINSULA
O: 9OCT2021 20:23:31 57.0N 156.2W ML=3.5 EMSC ALASKA PENINSULA
P: 7OCT2021 137744 54.7N 161.2W 3.5-5.0 ACCAA Unimak Islands, Aleutians
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 9OCT2021 15:25:45 43.5N 128.3W mb=3.5 EMSC OFF COAST OF OREGON
P: 5OCT2021 137713 43.9N 128.4W 3.0-4.6 BAAAA Off Coast of Oregon
NEIC reported this earthquake of M 3.5 off the coast of Oregon was felt with intensity IV in the area(s) of Oregon at Gold Beach.
O: 9OCT2021 21:10:58 49.4N 120.5W Ml=2.2 EMSC BRITISH COLUMBIA, CANADA
P: 9OCT2021 137724 47.7N 120.3W 2.0-4.2 ABAAA Washington state, U.S.
ROCKY MOUNTAINS REGION
O: 09OCT2021 09:00:38 44.3N 115.0W ML=2.9 EMSC SOUTHERN IDAHO
O: 09OCT2021 11:34:35 44.3N 115.2W Ml=2.6 EMSC SOUTHERN IDAHO
O: 09OCT2021 12:57:20 44.3N 115.1W Ml=2.4 EMSC SOUTHERN IDAHO
O: 09OCT2021 13:29:45 44.3N 115.1W ML=2.6 EMSC SOUTHERN IDAHO
O: 09OCT2021 14:22:31 44.3N 115.3W ML=2.4 EMSC SOUTHERN IDAHO
O: 09OCT2021 07:16:15 44.4N 115.1W ML=2.5 EMSC SOUTHERN IDAHO
O: 9OCT2021 07:19:03 44.3N 115.1W ML=2.8 EMSC SOUTHERN IDAHO
P: 8OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
O: 9OCT2021 23:08:42 19.2N 155.4W ML=3.9 EMSC ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 BAAAA Hawaii
MODERATE QUAKE SHAKES SOUTHERN PERU
EARTHQUAKE SUMMARY FOR OCTOBER 8, 2021
An earthquake of M 5.5-5.6 in Southern Peru today was felt with moderate intensity VII in Arequipa, Peru. This was the strongest earthquake in the world today. It occurred on the geomagnetic equator and may have been promoted by the geomagnetic disturbance two days ago. The last earthquake of greater magnitude within about 150 km of this epicenter occurred as an M 6.0 on May 31, 2020. This followed a major quake about 200 km to the northeast of this on March 1, 2019. Forecast 137766 had expected today's event within about 50 km of this epicenter was likely around October 9. This epicenter is at 103-104 degrees from the M 8.1 in the Alaska Peninsula and at M 7.2 in Vanuatu of October 2, 2021 and was probably promoted by energy from those sources. Further aftershocks in the Vanuatu region are expected as the seismic ping-pong effect from Peru is likely.
O: 09OCT2021 05:21:07 16.0S 72.0W mb=4.3 EMSC SOUTHERN PERU
O: 09OCT2021 04:47:52 15.6S 71.8W Mw=5.5 EMSC SOUTHERN PERU
O: 09OCT2021 04:47:52 15.6S 71.9W Mw=5.6 ANSS SOUTHERN PERU
O: 09OCT2021 05:50:11 15.6S 71.7W mb=4.7 EMSC SOUTHERN PERU
O: 09OCT2021 06:12:50 15.7S 72.0W ML=4.0 EMSC SOUTHERN PERU
O: 8OCT2021 09:28:00 15.5S 71.9W mb=4.2 EMSC SOUTHERN PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 AAAAA Central Peru
An earthquake of M 4.8 was widely felt in southeastern Puerto Rico today. NEIC reported intensity IV in Puerto Rico at Vieques, Mumacao, Luquillo, and II-III in Yabucca, Culebra, Ceiba, Punta Santiago, Puerto Real, Fajardo, and Naguabo. This is not an aftershock of the long-standing aftershock zone in southwestern Puerto Rico. This is the strongest earthquake in southeastern Puerto Rico in the past year. An M 5.3 occurred a year ago on October 7, 2020 and an M 5.0 occurred a year before that on October 6, 2019. These seasonal earthquakes appear to be related to regional weather patterns. Forecast 137596 had expected today's event with in about 50 km was likely around October 8.
O: 08OCT2021 20:22:30 18.0N 65.4W ML=3.1 EMSC PUERTO RICO REGION
O: 8OCT2021 18:28:23 18.0N 65.4W mb=4.6 EMSC PUERTO RICO REGION
P: 8OCT2021 137596 18.0N 65.0W 3.0-5.3 AAAAA Leeward Islands
An unusual earthquake of M 4.9 occurred in Victoria, Australia today. NEIC reported it was felt with intensity II-III in Victoria and South Australia at Murray Bridge, Horsham, Midua, Mount Barker, Victor Harbor, Adelaide, Mount Gambler, Swan Hill, Hamilton and Maryborough. This is the strongest earthquake within about 300 km of this epicenter in at least 30 years. An M 4.8 hit the area on October 27, 2001 and about 400 km northwest of this on May 3, 1997, the only similar quakes in Victoria since 1990. This follows an M 5.9 about 450 km southeast of this epicenter on September 21 in Victoria, Australia and may represent regional stress migration following that earthquake.
Forecast 137331 had expected today's event in late September or early October about 150 km south of today's epicenter. This epicenter is at 144-145 degrees from the M 7.2 in Haiti of August 14 and was probably promoted by energy from that source.
O: 08OCT2021 17:02:25 35.4S 141.1E ML=3.0 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 18:12:08 35.4S 141.1E ML=2.6 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 17:20:40 35.5S 141.0E ML=2.8 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 18:01:49 35.5S 141.1E ML=2.8 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 23:44:33 35.5S 141.1E ML=2.6 EMSC VICTORIA, AUSTRALIA
O: 8OCT2021 16:47:27 35.4S 141.0E mb=4.9 EMSC VICTORIA, AUSTRALIA
P: 28SEP2021 137331 37.0S 142.0E 4.0-5.0 CBAAA Australia
The strongest earthquake in the U.S. or Canada today was an M 4.4 in the Fox Islands, Aleutians, Alaska. This is the strongest earthquake in the eastern Fox Islands since an M 4.5 on August 17, 2021. The last of significantly larger magnitude was an M 4.7 on July 3, 2021. Today's event was not reported felt in this remote area. Forecast 137733 had expected this activity in the eastern Fox Islands was likely about 100 km to the east around October 7.
O: 9OCT2021 05:59:49 53.2N 166.8W mb=4.4 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 7OCT2021 137733 53.7N 165.3W 3.5-4.9 AAAAA Fox Islands, Aleutians
The volcanic eruption at La Palma, Canary Islands, Spain intensified and spewed lava with rivers of lava emptying into the sea and causing further destruction of property today. The strongest earthquake in the current eruption occurred today with M 4.0, also the second strongest in the Canary Islands since an M 5.4 on December 27, 2013 following a similar eruptive phase. Hundreds have been evacuated and more than 800 buildings have been destroyed in the eruption, but no deaths have been attributed to the eruption to date. The M 4.0 occurred within about an hour of local solar noon while an M 3.9 occurred within minutes of local solar noon and may have been promoted by high tidal stresses with the new moon which maximize near these hour. Forecast 137308 had expected continuing eruptive earthquakes in the Canary Island at the end of September and early October.
O: 08OCT2021 23:55:05 28.6N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 8OCT2021 12:46:00 28.6N 17.9W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
P: 24SEP2021 137308 28.0N 18.0W 3.0-4.5 DAAAA Canary Islands
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: 8OCT2021 19:54:33 27.4N 92.9E ML=3.6 EMSC ARUNACHAL PRADESH, INDIA
P: 9OCT2021 137620 27.0N 92.0E 4.0-5.4 AAAAA Myanmar
O: 9OCT2021 05:36:53 30.4N 94.8E mb=4.9 EMSC EASTERN XIZANG
P: 9OCT2021 137688 33.0N 92.0E 3.8-5.2 ACBAA Xizang
O: 9OCT2021 06:05:31 32.4N 49.8E ML=4.6 EMSC WESTERN IRAN
O: 08OCT2021 23:16:32 32.5N 49.7E mb=5.1 EMSC WESTERN IRAN
P: 8OCT2021 137677 34.0N 49.0E 3.8-5.2 ABAAA So. Iran
NEIC reported this earthquake of M 5.1 in Western Iran was felt with intensity II-III in the area(s) of Western Iran in Khuzestan at Masjed, Ahwaz and Aleshtar.
O: 8OCT2021 23:53:34 35.6N 82.4E mb=4.3 EMSC XINJIANG-XIZANG BORDER REGION
P: 6OCT2021 137687 30.0N 82.0E 3.8-5.2 ACAAA Xizang
O: 9OCT2021 06:54:11 63.3N 158.4E Mw=5.0 EMSC MAGADANSKAYA OBLAST', RUSSIA
INDONESIA AND PHILIPPINES
O: 8OCT2021 16:28:46 0.1S 124.2E ML=4.4 EMSC MOLUCCA SEA
P: 4OCT2021 137580 1.0S 124.0E 4.0-5.5 BAAAA Sulawesi area
O: 8OCT2021 12:44:39 2.0N 128.5E mb=4.3 EMSC HALMAHERA, INDONESIA
P: 10OCT2021 137556 3.0N 129.0E 4.0-5.4 AAAAA Halmahera
O: 8OCT2021 10:04:53 4.5N 95.4E mb=5.2 EMSC NORTHERN SUMATRA, INDONESIA
P: 10OCT2021 137559 7.0N 92.0E 4.0-5.7 ACCAA Nicobar Islands
NEIC reported this earthquake of M 5.2 in Southern Sumatra was felt with intensity II-III in the area(s) of Southern Sumatra with IV at Meulaboh, and in Banda Aceh, Devantara and Padang Sidenpuan.
O: 8OCT2021 16:34:53 4.7S 153.9E mb=4.4 EMSC NEW IRELAND REGION, P.N.G.
P: 6OCT2021 137579 6.0S 155.0E 4.0-5.5 ABAAA Solomon Islands
O: 8OCT2021 13:24:14 6.1S 151.7E mb=4.9 EMSC NEW BRITAIN REGION, P.N.G.
P: 6OCT2021 137570 6.0S 151.0E 4.0-5.4 AAAAA New Ireland
O: 8OCT2021 20:11:57 7.2S 108.7E ML=4.0 EMSC JAVA, INDONESIA
P: 10OCT2021 137576 7.0S 105.0E 4.0-5.9 AACAA So. of Java
O: 8OCT2021 22:04:12 7.4S 128.8E mb=4.3 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 10OCT2021 137561 6.0S 129.0E 4.0-5.4 ABAAA Banda Sea
O: 8OCT2021 20:11:09 7.8S 130.3E mb=4.4 EMSC KEP. TANIMBAR REGION, INDONESI
O: 09OCT2021 06:03:56 6.9S 130.1E ML=4.3 EMSC BANDA SEA
P: 8OCT2021 137584 6.0S 130.0E 4.0-5.5 ABAAA West Irian, PNG
CENTRAL AND SOUTH AMERICA
O: 8OCT2021 21:00:04 11.4S 77.9W ML=4.0 EMSC NEAR COAST OF CENTRAL PERU
P: 6OCT2021 137766 14.0S 76.0W 4.0-5.6 ACBAA Central Peru
O: 8OCT2021 12:00:04 14.1N 93.2W ML=4.1 EMSC OFF COAST OF CHIAPAS, MEXICO
P: 6OCT2021 137588 16.0N 94.0W 3.5-5.2 ABAAA Chiapas, Mexico
O: 8OCT2021 09:41:48 14.1S 74.5W ML=4.1 EMSC CENTRAL PERU
P: 6OCT2021 137766 14.0S 76.0W 4.0-5.6 AABAA Central Peru
O: 09OCT2021 05:21:07 16.0S 72.0W mb=4.3 EMSC SOUTHERN PERU
O: 09OCT2021 04:47:52 15.6S 71.8W Mw=5.5 EMSC SOUTHERN PERU
O: 09OCT2021 05:50:11 15.6S 71.7W mb=4.7 EMSC SOUTHERN PERU
O: 09OCT2021 06:12:50 15.7S 72.0W ML=4.0 EMSC SOUTHERN PERU
O: 8OCT2021 09:28:00 15.5S 71.9W mb=4.2 EMSC SOUTHERN PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 AAAAA Central Peru
O: 8OCT2021 23:07:50 15.6N 96.6W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO
P: 6OCT2021 137605 15.0N 97.0W 3.5-5.6 AAAAA Oaxaca, Mexico
O: 08OCT2021 08:57:56 15.9N 95.2W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
O: 8OCT2021 08:53:08 15.9N 95.2W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO
P: 10OCT2021 137588 15.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 8OCT2021 07:22:57 16.2S 73.8W ML=4.0 EMSC NEAR COAST OF SOUTHERN PERU
P: 9OCT2021 137766 15.0S 71.0W 4.0-5.4 AAAAA Central Peru
O: 9OCT2021 03:23:22 17.9N 66.9W Md=3.0 EMSC PUERTO RICO REGION
P: 8OCT2021 137596 18.0N 65.0W 3.0-5.3 AABAA Leeward Islands
O: 08OCT2021 20:22:30 18.0N 65.4W ML=3.1 EMSC PUERTO RICO REGION
O: 8OCT2021 18:28:23 18.0N 65.4W mb=4.6 EMSC PUERTO RICO REGION
P: 8OCT2021 137596 18.0N 65.0W 3.0-5.3 AAAAA Leeward Islands
O: 8OCT2021 16:26:54 24.2S 67.1W mb=4.3 EMSC SALTA, ARGENTINA
P: 9OCT2021 137783 24.0S 67.0W 4.0-5.4 AAAAA Argentina
O: 8OCT2021 14:09:32 29.6N 116.3W ML=4.1 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 8OCT2021 137663 30.2N 114.1W 2.0-4.0 AABAA SW U.S.A
P: 9OCT2021 137665 32.0N 116.3W 2.5-4.7 ACAAA So. California
AFRICA AND EUROPE
O: 08OCT2021 23:55:05 28.6N 17.8W ML=4.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 8OCT2021 12:46:00 28.6N 17.9W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
SOUTHWEST PACIFIC
O: 8OCT2021 15:53:38 19.5S 173.5W mb=4.8 EMSC TONGA
P: 7OCT2021 137780 19.0S 173.0W 4.0-5.7 AAAAA Tonga Islands
O: 8OCT2021 10:51:39 23.6S 179.5E mb=4.1 EMSC SOUTH OF FIJI ISLANDS
P: 1OCT2021 137793 23.0S 179.0E 4.0-5.6 CAAAA Tonga/Fiji
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 8OCT2021 09:27:58 49.2S 124.8E mb=4.6 EMSC WESTERN INDIAN-ANTARCTIC RIDGE
P: 6OCT2021 137810 49.0S 122.0E 4.0-5.6 AABAA So. of Australia
O: 8OCT2021 21:39:26 56.6S 25.6W Mw=5.1 EMSC SOUTH SANDWICH ISLANDS REGION
P: 4OCT2021 137813 58.0S 26.0W 4.0-5.8 BBAAA So. Sandwich Islands
O: 8OCT2021 22:55:34 60.2S 24.2W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION
P: 6OCT2021 137813 60.0S 26.0W 4.0-5.6 AAAAA So. Sandwich Islands
O: 8OCT2021 18:06:13 56.6S 69.3W mb=4.3 EMSC DRAKE PASSAGE
ZEALANDIA AND AUSTRALIA REGION
O: 08OCT2021 17:02:25 35.4S 141.1E ML=3.0 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 18:12:08 35.4S 141.1E ML=2.6 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 17:20:40 35.5S 141.0E ML=2.8 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 18:01:49 35.5S 141.1E ML=2.8 EMSC VICTORIA, AUSTRALIA
O: 08OCT2021 23:44:33 35.5S 141.1E ML=2.6 EMSC VICTORIA, AUSTRALIA
O: 8OCT2021 16:47:27 35.4S 141.0E mb=4.9 EMSC VICTORIA, AUSTRALIA
JAPAN AND KURIL ISLANDS
O: 9OCT2021 02:16:19 35.6N 140.2E mb=4.3 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 9OCT2021 137656 37.0N 138.0E 3.5-4.9 ABBAA No. Honshu, Japan
NEIC reported this earthquake of M 4.3 in Southeastern Honshu, Japan was felt with intensity II-IV in the area(s) of Southeastern Honshu, Japan in Chiba and Tokyo.
O: 9OCT2021 05:32:00 40.1N 142.1E mb=5.0 EMSC NEAR EAST COAST OF HONSHU, JAP
O: 9OCT2021 02:47:34 42.4N 142.0E mb=4.6 EMSC HOKKAIDO, JAPAN REGION
P: 2OCT2021 137694 42.0N 142.0E 3.5-5.5 CAAAA Hokkaido, Japan
NEIC reported this earthquake of M 4.6 in Hokkaido, Japan was felt with intensity II-III in the area(s) of Hokkaido, Japan at Sapporo.
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 9OCT2021 01:14:24 35.5N 118.4W Ml=2.1 EMSC CENTRAL CALIFORNIA
P: 8OCT2021 137674 35.6N 118.4W 2.5-4.8 AAAAA So. California
O: 8OCT2021 23:25:17 38.5N 119.4W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 5OCT2021 137635 38.7N 119.7W 2.5-4.5 BAAAA California/Nevada area
O: 8OCT2021 12:06:09 40.6N 125.1W ML=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA
O: 09OCT2021 03:49:56 40.6N 124.9W Md=2.8 EMSC OFFSHORE NORTHERN CALIFORNIA
O: 8OCT2021 21:39:05 40.7N 124.1W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 5OCT2021 137711 40.3N 124.2W 2.5-4.6 BAAAA Off Coast of No. Calif
ALASKA
O: 9OCT2021 05:59:49 53.2N 166.8W mb=4.4 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 7OCT2021 137733 53.7N 165.3W 3.5-4.9 AAAAA Fox Islands, Aleutians
O: 9OCT2021 01:14:51 63.0N 148.7W ML=3.0 EMSC CENTRAL ALASKA
P: 8OCT2021 137753 63.3N 147.5W 3.2-5.2 AAAAA Central Alaska
O: 8OCT2021 21:46:35 68.8N 146.3W ML=3.0 EMSC NORTHERN ALASKA
P: 5OCT2021 137756 69.0N 144.0W 3.0-4.8 BAAAA Northern Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 8OCT2021 14:23:39 48.3N 122.6W Md=2.3 EMSC PUGET SOUND REGION, WASHINGTON
P: 9OCT2021 137724 47.5N 121.8W 2.0-4.4 AAAAA Washington state, U.S.
ROCKY MOUNTAINS REGION
O: 08OCT2021 08:19:12 31.7N 104.5W ML=2.1 EMSC WESTERN TEXAS
O: 08OCT2021 12:16:55 31.7N 104.4W ML=2.7 EMSC WESTERN TEXAS
O: 08OCT2021 13:51:23 31.7N 104.4W ML=2.6 EMSC WESTERN TEXAS
O: 08OCT2021 15:08:11 31.7N 104.4W ML=2.1 EMSC WESTERN TEXAS
O: 8OCT2021 07:11:07 31.7N 104.4W ML=2.7 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 BAAAA SW U.S.A
O: 08OCT2021 13:17:49 44.3N 115.0W ML=2.7 EMSC SOUTHERN IDAHO
O: 08OCT2021 13:22:43 44.3N 115.0W Ml=2.1 EMSC SOUTHERN IDAHO
O: 09OCT2021 06:01:48 44.3N 115.1W ML=2.6 EMSC SOUTHERN IDAHO
O: 09OCT2021 06:38:32 44.3N 115.1W ML=3.1 EMSC SOUTHERN IDAHO
O: 08OCT2021 08:21:32 44.4N 115.2W Ml=2.3 EMSC SOUTHERN IDAHO
O: 8OCT2021 11:23:33 44.3N 115.2W Ml=2.3 EMSC SOUTHERN IDAHO
P: 8OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 8OCT2021 09:31:20 34.9N 97.7W ML=2.2 EMSC OKLAHOMA
O: 8OCT2021 20:11:01 35.1N 95.5W ML=2.6 EMSC OKLAHOMA
O: 8OCT2021 23:07:40 35.7N 97.2W ML=2.6 EMSC OKLAHOMA
P: 6OCT2021 137680 36.0N 97.0W 2.0-4.2 AAAAA Southern Plains
NEIC reported this earthquake of M 2.6 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Luther.
HAWAII
No earthquakes of M>=3 were located in Hawaii.
STRONG QUAKE JOLTS TOKYO, JAPAN
EARTHQUAKE SUMMARY FOR OCTOBER 7, 2021
A series of moderately strong to strong earthquakes occurred at high latitudes today. These included an M 6.1 in the Macquarie Island region south of New Zealand, an M 5.9 near Tokyo, Japan and an M 5.5 in the northern South Sandwich Islands. These may have been promoted by a strong disturbance in the high latitude geomagnetic field yesterday as reported in this summary:
"The geomagnetic field saw quiet conditions today. The AP level was 8. High latitude geomagnetic field saw minor storm conditions with AP 23. Enhanced seismicity is likely at higher latitudes with this disturbance in the next several days." (October 6-7, 2021)
The strongest earthquake felt in the world today was an M 5.9 in the region of southeastern Honshu, Japan near Tokyo. NEIC reported it was felt with maximum intensity V in Chiba and Tokyo, Japan at Chiba, Ichihara, Funabashi, Narashino, Yotsukaido, Urayasu, Yachiyo, Ichikawa, Kamagaya, Sakura among others. As noted, when an M 5.6 hit north of this in northern Honshu Japan, in the previous issue of this summary, this earthquake was probably promoted by the passage of Typhoon Mindulle east of this several days ago as:
"Super Typhoon Mindulle (TS 20W) continued in the area east of Honshu, Japan today with winds up to 70 kts. This system is moving to the northeast and is currently south of eastern Honshu, Japan. It is expected to track north reaching areas south of Honshu, Japan this week. Major seismic enhancement is possible in the area of Central and eastern Honshu in the next several days as this storm passes to the east." (October 2-3, 2021)
Today's event is the first within about 150 km of Tokyo, Japan with M>=5.9 in more than an year - since an M 5.9 on June 24, 2020. The last event of larger magnitude in this area was an M 6.2 five years ago on September 23, 2106. Forecast 137661 had expected today's event within this area was likely in early October. This epicenter is located at 103 degrees from the M 7.2 in Guerrero, Mexico of September 8 and, as previous noted in this summary was expected as a result of strong seismic energy concentrated at this distance from that event.
O: 7OCT2021 13:41:24 35.5N 140.1E Mw=5.9 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 2OCT2021 137661 35.0N 141.0E 4.0-5.6 BAAAA Off East Coast Honshu
The strongest earthquake in the world today was an M 6.1 south of New Zealand in
the region of Macquarie Island. This is a remote, but seismically active area and this event was not reported felt. The last earthquake in the Macquarie Island area of M>=6.1 was an M 6.1 about 500 km west of today's epicenter on March 20, 2021. The last earthquake within about 300 km of today's epicenter with M>=6.1 was an M 6.1 on October 13, 1995. The antipode of this epicenter in the Macquarie Island area is in the Reykjanes Ridge, in the north Atlantic south of Iceland. This area often sees enhanced seismicity following strong earthquakes in Macquarie Island.
O: 7OCT2021 20:13:01 58.9S 158.4E Mw=6.1 EMSC MACQUARIE ISLAND REGION
Also at high latitudes, an M 5.5 occurred in the South Sandwich Islands at the opposite longitude to the event in the Macquarie Island region. This continues regional aftershock activity in the South Sandwich Islands following the M 8,1 there on August 12, but is far to the north of most of the aftershocks of that event. Aftershocks of M 5.5-5.7 have hit within about 200 km of today's epicenter in the aftershock sequence on September 5, August 14 and 16, 2021. A moderate foreshock of M 5.7 to the M 8.1 of August 12 occurred on July 17, 2021, the first such event in the region since 2019. Forecast 137813 had expected today's event was likely within about 50 km around October 2. This epicenter is located at 101 degrees from the M 7.2 in Vanuatu of October 2 and was probably promoted by energy from that source.
O: 7OCT2021 17:56:14 55.8S 26.5W mb=5.5 EMSC SOUTH SANDWICH ISLANDS REGION
P: 2OCT2021 137813 56.0S 27.0W 4.0-5.7 BAAAA So. Sandwich Islands
An earthquake of M 5.5 shook regions of Myanmar today. NEIC reported maximum intensity V in Myanmar at Monywa Sagang and Alzawi Mizoram, India with lesser shaking of II-III in Pakokku, Myanmar; and in Bangladesh at Dhemsa, Fatekharkui Koka, Chattagam, Coxs Bazar, Dacca and in India at Sichar, Assam and Shillong, Meghalaya. This earthquake occurred within about 30 minutes of local solar midnight and may have been promoted by high tidal stresses which maximize near this hour. This is the strongest earthquake in Myanmar within about 200 km of this epicenter since an M 5.6 on June 21, 2020. That event appears to have been triggered by the total solar eclipse which was visible a day earlier in Myanmar. Stresses associated with the new moon appear to help enhance regional seismicity in this area. At the time of the June, 2020 eclipse, this summary noted:
"A moderately strong earthquake also occurred with M 5.7-5.8 today in the region of Mizoram, India near Bangladesh and Myanmar. ... The area had just experienced an annular solar eclipse several hours earlier and an M 5.1 foreshock with that eclipse.
The earthquake in India/Myanmar today occurred near the sub-solar point at the time of the total eclipse." (June 21-22, 2020)
Forecast 137619 had expected today's event was likely within about 100 km around October 5.
O: 7OCT2021 18:28:04 22.3N 94.8E Mw=5.5 EMSC MYANMAR
P: 5OCT2021 137619 23.0N 95.0E 4.0-5.6 AAAAA Myanmar
An M 3.7 earthquake in Hawaii continued the eruption of Kilauea today. NEIC reported it was felt with intensity II-III in Hawaii at Pahala, Naalehu, Captain Cook, Holualoa and Kailua Kona. Forecast 137594 expected today's event within the eruptive area was likely around October 6, 2021. This is the strongest earthquake in the U.S. or Canada today. An M 4.5-4.6 hit this area two days ago on October 6 but this is one of the strongest earthquakes to date associated with the current Kilauea eruption.
O: 8OCT2021 06:25:04 19.2N 155.5W ML=3.7 EMSC ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 AAAAA Hawaii
The volcanic eruption at La Palma, Canary Islands, Spain continued to spew lava with rivers of lava emptying into the sea today. The strongest earthquake in the current eruption occurred today with M 4.3, also the strongest in the Canary Islands since an M 5.4 on December 27, 2013 following a similar eruptive phase.
Hundreds have been evacuated and hundreds of buildings destroyed in the eruption, but no deaths have been attributed to the eruption to date. The M 4.3 occurred within about an hour of local solar noon and may have been promoted by high tidal stresses with the new moon which maximize near this hour. Forecast 137308 had expected continuing eruptive earthquakes in the Canary Island at the end of September and early October.
O: 07OCT2021 07:18:45 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 07OCT2021 14:26:04 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 07OCT2021 15:49:15 28.6N 17.8W ML=3.6 EMSC CANARY ISLANDS, SPAIN REGION
O: 08OCT2021 06:49:01 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 7OCT2021 11:17:08 28.7N 17.8W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
P: 24SEP2021 137308 28.0N 18.0W 3.0-4.5 DAAAA Canary Islands
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: 7OCT2021 18:28:04 22.3N 94.8E Mw=5.5 EMSC MYANMAR
P: 5OCT2021 137619 23.0N 95.0E 4.0-5.6 AAAAA Myanmar
O: 7OCT2021 17:31:17 32.3N 49.7E ML=4.0 EMSC WESTERN IRAN
P: 4OCT2021 137677 31.0N 50.0E 3.8-5.3 BBAAA So. Iran
O: 7OCT2021 13:16:23 44.3N 92.5E mb=4.5 EMSC NORTHERN XINJIANG, CHINA
P: 7OCT2021 137741 50.0N 88.0E 3.0-4.4 AAAAA So. Siberia
INDONESIA AND PHILIPPINES
O: 7OCT2021 19:17:01 0.4N 126.1E ML=4.1 EMSC MOLUCCA SEA
P: 4OCT2021 137580 1.0S 124.0E 4.0-5.5 BBBAA Sulawesi area
O: 7OCT2021 11:03:27 2.5N 128.2E ML=4.2 EMSC HALMAHERA, INDONESIA
P: 10OCT2021 137556 3.0N 129.0E 4.0-5.4 BAAAA Halmahera
O: 7OCT2021 07:01:34 3.8S 136.7E ML=4.2 EMSC PAPUA, INDONESIA
P: 5OCT2021 137582 2.0S 135.0E 4.0-5.6 ABBAA West Irian, PNG
O: 7OCT2021 17:43:01 6.5S 130.2E ML=4.5 EMSC BANDA SEA
O: 7OCT2021 10:38:04 6.8S 132.4E mb=4.3 EMSC KEP. TANIMBAR REGION, INDONESI
O: 7OCT2021 12:07:18 6.9S 129.6E mb=4.2 EMSC BANDA SEA
P: 8OCT2021 137584 6.0S 130.0E 4.0-5.5 AAAAA West Irian, PNG
O: 7OCT2021 18:14:53 13.9N 120.7E Mw=5.2 EMSC MINDORO, PHILIPPINES
P: 5OCT2021 137598 13.0N 121.0E 3.5-5.2 AAAAA Luzon, Philippines
NEIC reported this earthquake of M 5.2 in Mindoro, Philippines was felt with intensity II-III in the area(s) of Luzon, Philippines at Mariveles and San Benito, Luzon and Cainta Southern Tagalog, Philippines.
CENTRAL AND SOUTH AMERICA
O: 07OCT2021 14:37:30 10.7N 86.6W ML=4.5 EMSC OFF COAST OF COSTA RICA
O: 7OCT2021 13:12:30 10.7N 86.7W ML=4.7 EMSC OFF COAST OF COSTA RICA
P: 3OCT2021 137602 11.0N 86.0W 3.5-5.3 BAAAA Nicaragua
O: 07OCT2021 16:11:43 12.7N 88.3W mb=4.0 EMSC OFFSHORE EL SALVADOR
O: 7OCT2021 21:45:19 12.0N 89.5W mb=4.4 EMSC OFF THE COAST OF EL SALVADOR
P: 3OCT2021 137592 13.0N 90.0W 3.5-5.5 BAAAA Guatemala
O: 7OCT2021 08:01:53 12.4N 87.6W ML=4.3 EMSC NEAR COAST OF NICARAGUA
P: 10OCT2021 137602 12.0N 87.0W 3.5-5.5 BAAAA Nicaragua
O: 7OCT2021 18:49:44 13.9N 92.7W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO
P: 7OCT2021 137592 14.0N 91.0W 3.5-5.2 AABAA Guatemala
O: 8OCT2021 06:56:23 14.5N 83.1W ML=4.6 EMSC NICARAGUA
P: 10OCT2021 137602 12.0N 87.0W 3.5-5.5 ACCAA Nicaragua
O: 7OCT2021 20:43:39 15.3S 72.1W ML=4.0 EMSC SOUTHERN PERU
P: 5OCT2021 137766 15.0S 73.0W 4.0-5.6 AAAAA Central Peru
O: 08OCT2021 04:58:17 15.9N 95.1W ML=4.6 EMSC OFFSHORE OAXACA, MEXICO
O: 7OCT2021 11:31:46 15.7N 95.5W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 4OCT2021 137589 16.0N 95.0W 3.5-5.3 BAAAA Chiapas, Mexico
P: 10OCT2021 137588 15.0N 95.0W 3.5-5.3 BAAAA Chiapas, Mexico
O: 7OCT2021 17:53:23 16.9N 60.3W ML=4.4 EMSC GUADELOUPE REGION, LEEWARD ISL
P: 5OCT2021 137595 17.0N 60.0W 3.0-5.0 AAAAA Leeward Islands
NEIC reported this earthquake of M 4.4 in Guadeloupe was felt with intensity II-III in the area(s) of Guadeloupe at Le Moule Grande-Terre.
O: 7OCT2021 07:13:21 17.2N 94.5W ML=4.1 EMSC OAXACA, MEXICO
P: 6OCT2021 137588 16.0N 94.0W 3.5-5.2 ABAAA Chiapas, Mexico
O: 8OCT2021 04:49:48 18.4N 73.5W ML=3.6 EMSC HAITI REGION
P: 7OCT2021 137609 20.0N 74.0W 3.4-4.9 AAAAA Puerto Rico
O: 8OCT2021 06:43:07 23.9S 66.8W mb=4.5 EMSC JUJUY, ARGENTINA
P: 7OCT2021 137783 23.0S 67.0W 4.0-5.4 AAAAA Argentina
P: 9OCT2021 137783 24.0S 67.0W 4.0-5.4 AAAAA Argentina
O: 7OCT2021 16:11:56 24.4N 109.0W ML=3.9 EMSC GULF OF CALIFORNIA
P: 29SEP2021 137309 24.0N 109.0W 3.5-4.9 CAAAA Gulf of California
AFRICA AND EUROPE
O: 07OCT2021 07:18:45 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 07OCT2021 14:26:04 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 07OCT2021 15:49:15 28.6N 17.8W ML=3.6 EMSC CANARY ISLANDS, SPAIN REGION
O: 08OCT2021 06:49:01 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
O: 7OCT2021 11:17:08 28.7N 17.8W ML=4.3 EMSC CANARY ISLANDS, SPAIN REGION
P: 24SEP2021 137308 28.0N 18.0W 3.0-4.5 DAAAA Canary Islands
O: 7OCT2021 08:49:54 39.5N 54.7E ML=3.9 EMSC TURKMENISTAN
P: 3OCT2021 137696 40.0N 55.0E 4.0-5.4 BAAAA Kazakhstan
O: 7OCT2021 11:01:52 41.1N 48.9E mb=4.0 EMSC AZERBAIJAN
P: 9OCT2021 137658 37.0N 51.0E 3.8-5.2 ACBAA No. Iran
SOUTHWEST PACIFIC
O: 8OCT2021 04:43:11 17.6S 178.4W mb=4.2 EMSC FIJI REGION
P: 9OCT2021 137779 17.0S 177.0W 4.0-5.7 AAAAA Tonga Islands
O: 8OCT2021 02:58:00 25.3S 178.8E mb=4.4 EMSC SOUTH OF FIJI ISLANDS
O: 8OCT2021 03:25:57 26.0S 179.0W mb=4.3 EMSC SOUTH OF FIJI ISLANDS
P: 7OCT2021 137792 25.0S 180.0W 4.0-5.4 AAAAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 7OCT2021 20:13:01 58.9S 158.4E Mw=6.1 EMSC MACQUARIE ISLAND REGION
O: 7OCT2021 17:56:14 55.8S 26.5W mb=5.5 EMSC SOUTH SANDWICH ISLANDS REGION
P: 2OCT2021 137813 56.0S 27.0W 4.0-5.7 BAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia
today. GeoNet did not report any felt events in the area.
JAPAN AND KURIL ISLANDS
O: 7OCT2021 16:44:21 31.8N 137.9E mb=4.1 EMSC IZU ISLANDS, JAPAN REGION
P: 9OCT2021 137643 33.0N 137.0E 3.5-4.9 ABAAA Central/So. Honshu Japan
O: 7OCT2021 13:41:24 35.5N 140.1E Mw=5.9 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 2OCT2021 137661 35.0N 141.0E 4.0-5.6 BAAAA Off East Coast Honshu
O: 7OCT2021 14:24:30 41.3N 142.2E ML=4.1 EMSC HOKKAIDO, JAPAN REGION
P: 2OCT2021 137694 42.0N 142.0E 3.5-5.5 BAAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 8OCT2021 00:44:54 35.9N 119.9W Md=2.9 EMSC CENTRAL CALIFORNIA
P: 10OCT2021 137637 36.1N 120.1W 2.5-4.7 AAAAA Central California
O: 7OCT2021 18:36:06 37.0N 118.3W Md=2.3 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137632 37.4N 118.6W 2.5-4.8 AAAAA California/Nevada area
O: 7OCT2021 14:54:14 37.4N 117.1W ml=2.3 EMSC NEVADA
P: 4OCT2021 137631 37.2N 117.3W 2.5-4.6 BAAAA California/Nevada area
O: 08OCT2021 00:32:02 37.8N 122.1W Md=2.1 EMSC SAN FRANCISCO BAY AREA, CALIF.
O: 7OCT2021 08:21:24 37.8N 122.2W Md=2.1 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 5OCT2021 137640 37.8N 122.6W 2.5-4.6 AAAAA Central California
O: 8OCT2021 00:13:49 38.1N 119.0W ML=3.4 EMSC CENTRAL CALIFORNIA
O: 8OCT2021 00:13:49 38.1N 119.0W ML=3.5 ANSS CENTRAL CALIFORNIA
P: 7OCT2021 137634 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area
NEIC reported this earthquake of M 3.5 in Central California was felt with intensity II-III in the area(s) of Central California in Lee Vining, June Lake, Coleville, Yosemite National Park.
O: 08OCT2021 00:42:52 38.1N 118.9W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 07OCT2021 07:34:50 38.5N 119.4W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 07OCT2021 07:40:53 38.5N 119.4W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 8OCT2021 01:19:03 38.5N 119.5W Md=2.4 EMSC CENTRAL CALIFORNIA
P: 5OCT2021 137635 38.7N 119.7W 2.5-4.5 BAAAA California/Nevada area
O: 8OCT2021 03:07:36 40.2N 119.8W ml=2.0 EMSC NEVADA
P: 7OCT2021 137710 40.0N 120.9W 2.5-4.6 AAAAA Northern California
O: 8OCT2021 01:08:50 40.6N 125.0W ML=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 9OCT2021 137712 40.4N 127.2W 2.5-4.6 AABAA Off Coast of No. Calif
O: 8OCT2021 03:58:23 41.1N 122.2W Md=2.5 EMSC NORTHERN CALIFORNIA
P: 7OCT2021 137710 40.0N 120.9W 2.5-4.6 ABAAA Northern California
NEIC reported this earthquake of M 2.5 in Northern California was felt with intensity II-III in the area(s) of Northern California in Dunsmuit, McCloud, Montgomery Creek, Lakehead and Montague.
O: 7OCT2021 07:53:46 41.4N 126.0W ML=2.7 EMSC OFF COAST OF NORTHERN CALIFORN
P: 4OCT2021 137712 41.8N 126.9W 2.5-4.8 BAAAA Off Coast of No. Calif
NEIC reported this earthquake of M 2.7 off the coast of northern California was felt with intensity II-III in the area(s) of the coast of northern California.
ALASKA
O: 8OCT2021 05:01:46 56.7N 141.4W ML=3.0 EMSC OFF COAST OF SOUTHEASTERN ALAS
P: 8OCT2021 137742 59.0N 136.0W 3.0-4.4 ACCAA Southeast Alaska
O: 7OCT2021 20:10:59 56.8N 149.4W ml=3.0 EMSC GULF OF ALASKA
P: 6OCT2021 137756 55.0N 149.0W 3.0-4.8 AAAAA Northern Alaska
O: 7OCT2021 13:47:00 62.4N 150.6W ML=3.2 EMSC CENTRAL ALASKA
P: 6OCT2021 137752 62.7N 150.6W 3.2-5.4 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
No events of M>=2 were located in the northwestern U.S. or western Canada today.
ROCKY MOUNTAINS REGION
O: 07OCT2021 08:57:04 31.7N 104.4W ML=2.3 EMSC WESTERN TEXAS
O: 07OCT2021 10:20:09 31.7N 104.4W ML=2.9 EMSC WESTERN TEXAS
O: 07OCT2021 10:56:24 31.7N 104.5W ML=2.4 EMSC WESTERN TEXAS
O: 7OCT2021 15:24:38 31.6N 104.6W ML=2.5 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 BAAAA SW U.S.A
O: 7OCT2021 14:02:47 32.7N 100.7W ML=2.2 EMSC WESTERN TEXAS
P: 4OCT2021 137680 35.0N 97.0W 2.0-4.2 BCCAA Southern Plains
O: 08OCT2021 03:50:17 44.3N 115.0W ML=2.8 EMSC SOUTHERN IDAHO
O: 8OCT2021 03:14:16 44.3N 115.0W ML=2.9 EMSC SOUTHERN IDAHO
P: 8OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 8OCT2021 02:14:18 34.9N 97.7W mb=2.4 EMSC OKLAHOMA
P: 4OCT2021 137680 35.0N 97.0W 2.0-4.2 BAAAA Southern Plains
NEIC reported this earthquake of M 2.6 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Bradley.
HAWAII
O: 8OCT2021 06:25:04 19.2N 155.5W ML=3.7 EMSC ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 AAAAA Hawaii
STRONG EARTHQUAKE SHAKES SOUTHERN PAKISTAN WITH NEW MOON
EARTHQUAKE SUMMARY FOR OCTOBER 6, 2021
The strongest earthquake in the world today occurred as an M 5.9 in Pakistan. NEIC reported slight damage and intensity VIII in Baluchistan, Pakistan at Sibi; VII in Harnai; V in Kot Abdul, Charman; IV in Quetta and Bhag and II-III in Loralai, Multan, Punjab and in Kandahar, Afghanistan. An aftershock of M 4.6 was reported with intensity V in Harnai, and IV in Quetta, Baluchistan, Pakistan. This event caused a mine to collapse and killed at least 20 people while injuring hundreds. Hundreds of buildings in the area collapsed or were damaged with the strongest damage in Harnai, Pakistan in southwestern Pakistan. Video on the web showed extensive damage an much debris on the streets of Harnai and Quetta. This event was probably promoted by a Tropical Cyclone, the strongest in the area in years, that passed over this epicenter several days ago as noted in previous issues of this summary:
"Tropical Cyclone Shaheen-Gulab (03B) continued today south of eastern Iran with winds up to 85 kts. It is expected to track to the west areas south of Iran in the next several days. Some enhanced seismicity may occur in southern Iran as this storm is in the area." (October 1-3, 2021)
and
"Tropical Cyclone Gulab (03B) resumed today south of Pakistan with winds up to 65 kts. It is expected to track to the west areas south of Iran in the next several days. Some enhanced seismicity may occur in southern Iran as this storm is in the area." (October 1-2, 2021)
Today's M 5.9 is the strongest earthquake in Pakistan within about 250 km of this epicenter since an M 6.4 on October 28 and again on October 29, 2008. Forecast 137647 had expected regionally enhanced seismicity in Pakistan was likely around October 6.
O: 07OCT2021 00:00:56 30.2N 68.0E mb=4.6 EMSC PAKISTAN
O: 6OCT2021 22:01:08 30.2N 68.1E Mw=5.9 EMSC PAKISTAN
P: 6OCT2021 137647 36.0N 69.0E 3.8-5.4 ACAAA Hindu Kush/Pakistan
A series of earthquakes occurred today in connection with the new moon which arrived this morning of October 6 as noted in this and previous issues of this summary as:
"The New moon arrived at 11:05 UT on October 6. Longitudes which were at local solar noon at this time are near 15 East while those at local solar midnight are near 165 West longitude. In the west these include most areas of Europe and Africa and in the east the central Aleutians and the Alaska Peninsula, Hawaii and the Tonga-Fiji-Kermadec arc. These area are the most likely to see a strong tidally triggered earthquake in the next week. Other areas may also see tidal triggering. These are most likely to occur near local solar midnight and local solar noon. The possibility of a strong to major earthquake is considered moderate to strong before October 10." (October 3-6, 2021)
An earthquake of M 4.9 in Bosnia and Herzegovina was widely felt today. NEIC reported it was felt with maximum intensity V in Makarska Split, Dalmacia, Croatis and IV in Supetar, Split, Jesenice, Mravince, Vranjic, and in Tomisiavgrad, Bosnia and Herzegovina with lesser shaking at Katuni, Breia, and Tucepi, Croatia. This epicenter is at the longitude of maximum tidal stress with this new moon and was probably promoted by high tidal stresses. This is the strongest earthquake within about 200 km of this epicenter since an M 5.4 on November 26, 2019 and prior to that an M 4.9 on November 18, 2013. A series of events about 200 km north of this on March 22, 2020 and December 28-29, 2020 included an M 6.4 which was damaging in the area. Forecast 137695 had expected today's event within about 100 km was likely around October 3. This event is at 102-103 degrees from the M 8.1 in the South Sandwich Islands of August 12 and from the M 7.2 in Haiti of August 14 and was probably promoted by energy from those sources.
O: 6OCT2021 19:57:34 43.6N 16.8E mb=4.8 EMSC CROATIA
P: 3OCT2021 137695 43.0N 16.0E 3.0-5.3 BAAAA Italy
An M 4.6 was widely felt in North Island, New Zealand today. NEIC reported intensity IV in Taumarunui Manawatu-Wanganui and II-III in Palmerston North, Levin, Kapiti, Upper Hutt and Lower Hutt, North Island, New Zealand.
GEONET reported this earthquake was felt with moderate intensity east of Stratford and in southwestern North Island and northern South Island. Light to moderate intensity was reported throughout much of southern North Island and northern South Island. More than 684 people reported feeling this earthquake with 538 reporting weak shaking; 132 light; 13 moderate and 1 strong intensity. This earthquake occurred within about an hour of local solar noon in an area of the highest tidal stresses with today's new moon and was probably tidally promoted. A similar M 4.6 occurred in this area on November 29, 2020 following an M 4.8 on November 20, 2020, the only such events within about 100 km of this epicenter of M>=4.6 in the past year. Forecast 137805 had expected today's event in this area was likely around October 5.
O: 7OCT2021 00:09:21 39.2S 174.8E mb=4.6 EMSC NORTH ISLAND OF NEW ZEALAND
O: 07OCT2021 00:09:22 39.2S 174.8E MS=4.7 GEONET Felt with moderate intensity
P: 5OCT2021 137805 40.0S 174.0E 3.0-4.5 AAAAA North Island, N.Z.
An earthquake of M 5.4 was also felt in Tonga today. This event was reported by NEIC with intensity IV in Apia, Samoa and in American Samoa with intensity III. Like events in New Zealand and the Unimak Islands, Alaska, this is located near the longitude of maximum tidal stress with the current new moon and was probably promoted by tidal stresses. It is likely an aftershock of an M 5.7 about 50 km north of this that occurred on October 2, 2021. The only other events in the area of larger magnitude in the past year occurred as an M 6.2 on November 7 and an M 5.9 on October 25, 2020. Forecast 137779 had expected today's event was likely within about 100 km around October 5.
O: 6OCT2021 15:54:20 15.4S 173.3W mb=5.4 ANSS NE of Hihifo Tonga
P: 5OCT2021 137779 16.0S 174.0W 4.0-5.6 AAAAA Tonga Islands
An earthquake of M 5.4 was also felt in the region of Kyushu, Japan today. NEIC reported this was felt with maximum intensity VI in Miyazaki; V in Kagoshima, Japan. This is the strongest earthquake in Kyushu, Japan within about 200 km of this epicenter since an M 6.1 on May 9, 2019 more than two years ago. Forecast 137650 had expected today's event within about 100 km was likely around October 8.
O: 6OCT2021 08:12:55 31.3N 131.3E Mw=5.5 EMSC KYUSHU, JAPAN
P: 8OCT2021 137650 31.0N 130.0E 3.5-4.9 AAAAA Kyushu, Japan area
An unusual earthquake of M 4.2 occurred in eastern Argentina near Formosa today. This event occurred at the maximum of a strong C4.0+ class solar flare and was probably promoted by effects from this flare (SFE) as it occurred near local solar midnight, a prime time for SFE. This is the first earthquake of M>=4.2 within about 300 km of this epicenter in at least 30 years. A deep focus event hit about 300 km west of this with M 5.6 on January 17, 2015, the only such regional event since at least 1990.
O: 7OCT2021 02:43:54 25.1S 60.8W ML=4.2 EMSC FORMOSA, ARGENTINA
The strongest earthquake in the U.S. or Canada today was an M 3.5 south of Mammoth Lakes, California. NEIC reported this earthquake of M 3.5 in Big Pine, California was felt with intensity II-III in the area(s) of Big Pine, California and Merced. The only event within about 50 km of this epicenter in the past year was an M 3.7 on February 14, 2021. An M 3.5 also hit the area a year ago on October 5, 2020. Forecast 137632 had expected today's event in this area was likely around October 7.
O: 6OCT2021 14:25:27 37.0N 118.3W Mw=3.5 EMSC CENTRAL CALIFORNIA
O: 06OCT2021 15:45:27 37.0N 118.3W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137632 37.4N 118.6W 2.5-4.8 AAAAA California/Nevada area
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: 07OCT2021 00:00:56 30.2N 68.0E mb=4.6 EMSC PAKISTAN
O: 6OCT2021 22:01:08 30.2N 68.1E Mw=5.9 EMSC PAKISTAN
P: 6OCT2021 137647 36.0N 69.0E 3.8-5.4 ACAAA Hindu Kush/Pakistan
O: 6OCT2021 20:21:43 23.9N 121.5E ML=4.2 EMSC TAIWAN
O: 7OCT2021 04:16:43 24.7N 122.5E ML=4.9 TAI Hualien, Taiwan
O: 6OCT2021 20:21:43 23.9N 121.5E ML=4.2 TAI Hualien, Taiwan
P: 3OCT2021 137622 25.0N 123.0E 4.0-5.6 BAAAA Ryukyu Islands
P: 5OCT2021 137626 24.0N 122.0E 4.0-5.4 AAAAA Taiwan
CWB reported the earthquake of M 4.9 was felt with intensity I in Yilan, Hualien, Taipei, Nantou and Taitung Counties, Taiwan.
The event of M 4.2 was felt with intensity IV in Hualien, III in Nantou, II in Taichung, I in Yilan Counties, Taiwan.
O: 6OCT2021 14:30:38 52.7N 159.6E mb=4.7 EMSC OFF EAST COAST OF KAMCHATKA
P: 8OCT2021 137734 53.0N 159.0E 4.0-5.9 AAAAA Kamchatka
INDONESIA AND PHILIPPINES
O: 6OCT2021 23:40:20 2.6N 128.4E mb=4.5 EMSC HALMAHERA, INDONESIA
P: 10OCT2021 137556 3.0N 129.0E 4.0-5.4 BAAAA Halmahera
O: 7OCT2021 03:15:11 3.4S 135.4E ML=4.0 EMSC PAPUA, INDONESIA
P: 1OCT2021 137582 4.0S 134.0E 4.0-5.4 CAAAA West Irian, PNG
P: 5OCT2021 137582 2.0S 135.0E 4.0-5.6 ABAAA West Irian, PNG
O: 6OCT2021 15:08:38 4.0N 122.9E ML=4.6 EMSC CELEBES SEA
P: 7OCT2021 137558 6.0N 124.0E 4.0-5.4 ABBAA Mindanao, Philippines
O: 6OCT2021 10:12:27 4.4N 125.9E ML=4.1 EMSC KEPULAUAN SANGIHE, INDONESIA
P: 6OCT2021 137556 5.0N 128.0E 4.0-5.4 AABAA Halmahera
O: 6OCT2021 22:44:58 5.1S 146.3E mb=4.6 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 3OCT2021 137569 5.0S 146.0E 4.0-5.4 BAAAA New Ireland
O: 6OCT2021 16:51:42 5.4N 127.5E ML=4.5 EMSC PHILIPPINE ISLANDS REGION
P: 6OCT2021 137556 5.0N 128.0E 4.0-5.4 AAAAA Halmahera
O: 7OCT2021 01:05:35 6.9S 105.0E ML=4.8 EMSC SUNDA STRAIT, INDONESIA
P: 10OCT2021 137576 7.0S 105.0E 4.0-5.9 BAAAA So. of Java
O: 6OCT2021 12:15:21 7.0S 129.3E mb=4.2 EMSC KEPULAUAN BABAR, INDONESIA
P: 8OCT2021 137584 6.0S 130.0E 4.0-5.5 AAAAA West Irian, PNG
O: 7OCT2021 05:13:01 8.3S 119.5E mb=4.9 EMSC FLORES REGION, INDONESIA
P: 7OCT2021 137581 8.0S 119.0E 4.0-5.4 AAAAA Sumbawa Island area
O: 6OCT2021 13:38:04 9.6S 124.7E ML=4.4 EMSC TIMOR REGION
P: 9OCT2021 137768 10.0S 124.0E 4.0-5.5 BAAAA Flores Island area
CENTRAL AND SOUTH AMERICA
O: 6OCT2021 08:57:14 2.4S 80.0W ML=4.3 EMSC NEAR COAST OF ECUADOR
O: 7OCT2021 05:59:07 2.5S 78.8W mb=4.3 EMSC ECUADOR
P: 7OCT2021 137565 2.0S 80.0W 4.0-5.6 AAAAA Ecuador
O: 7OCT2021 01:22:52 14.7N 92.9W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO
P: 28SEP2021 137278 14.0N 93.0W 3.5-5.1 CAAAA Chiapas, Mexico
O: 6OCT2021 11:18:26 15.4N 94.7W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 4OCT2021 137589 16.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico
P: 6OCT2021 137588 16.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico
O: 6OCT2021 09:12:16 16.1N 93.8W ML=4.0 EMSC CHIAPAS, MEXICO
P: 6OCT2021 137588 16.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico
O: 7OCT2021 04:25:45 16.7N 95.1W ML=4.0 EMSC OAXACA, MEXICO
P: 4OCT2021 137589 16.0N 95.0W 3.5-5.3 BAAAA Chiapas, Mexico
O: 6OCT2021 08:55:07 18.2N 101.7W ML=4.1 EMSC GUERRERO, MEXICO
P: 7OCT2021 137601 19.0N 102.0W 3.5-5.4 AAAAA Michoacan, Mexico
O: 07OCT2021 05:01:25 18.5N 73.6W ML=3.3 EMSC HAITI REGION
O: 6OCT2021 07:38:34 18.4N 73.7W ML=3.2 EMSC HAITI REGION
P: 7OCT2021 137609 20.0N 74.0W 3.4-4.9 ABAAA Puerto Rico
O: 6OCT2021 19:05:29 19.3N 105.0W ML=3.4 EMSC OFFSHORE JALISCO, MEXICO
P: 7OCT2021 137601 19.0N 104.0W 3.5-5.2 AAAAA Michoacan, Mexico
O: 6OCT2021 18:02:26 21.5S 69.0W mb=4.3 EMSC ANTOFAGASTA, CHILE
P: 5OCT2021 137785 21.0S 69.0W 4.0-5.6 AAAAA Coast No. Chile
O: 7OCT2021 02:43:54 25.1S 60.8W ML=4.2 EMSC FORMOSA, ARGENTINA
O: 6OCT2021 23:38:09 25.3S 64.5W mb=5.0 EMSC SALTA, ARGENTINA
P: 3OCT2021 137783 23.0S 66.0W 4.0-5.6 BCBAA Argentina
P: 9OCT2021 137783 24.0S 67.0W 4.0-5.4 BBCAA Argentina
NEIC reported this earthquake of M 5.0 in Argentina was felt with intensity II-III in the area(s) of Argentina in Salta and Tucuman.
AFRICA AND EUROPE
O: 06OCT2021 18:56:43 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 06OCT2021 22:42:04 28.6N 17.8W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
O: 6OCT2021 07:25:47 28.6N 17.8W ML=3.8 EMSC CANARY ISLANDS, SPAIN REGION
SOUTHWEST PACIFIC
O: 6OCT2021 15:54:20 15.4S 173.3W mb=5.4 ANSS NE of Hihifo Tonga
P: 5OCT2021 137779 16.0S 174.0W 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: 7OCT2021 00:09:21 39.2S 174.8E mb=4.6 EMSC NORTH ISLAND OF NEW ZEALAND
O: 07OCT2021 00:09:22 39.2S 174.8E MS=4.7 GEONET Felt with moderate intensity
P: 5OCT2021 137805 40.0S 174.0E 3.0-4.5 AAAAA North Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 6OCT2021 08:12:55 31.3N 131.3E Mw=5.5 EMSC KYUSHU, JAPAN
P: 8OCT2021 137650 31.0N 130.0E 3.5-4.9 AAAAA Kyushu, Japan area
O: 7OCT2021 03:55:36 47.8N 152.0E mb=4.0 EMSC KURIL ISLANDS
P: 8OCT2021 137721 46.0N 153.0E 3.5-5.6 ABAAA So. Kurils
O: 6OCT2021 13:06:13 49.7N 155.8E mb=5.0 EMSC KURIL ISLANDS
P: 5OCT2021 137704 49.0N 156.0E 3.5-5.4 AAAAA NE Pacific
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 06OCT2021 09:54:08 30.8N 114.3W ML=3.8 EMSC GULF OF CALIFORNIA
O: 6OCT2021 09:25:47 30.8N 114.4W ML=3.7 EMSC GULF OF CALIFORNIA
P: 8OCT2021 137663 30.2N 114.1W 2.0-4.0 AAAAA SW U.S.A
O: 6OCT2021 07:19:39 31.5N 115.6W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO
O: 6OCT2021 20:20:56 32.8N 115.5W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 7OCT2021 137666 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 6OCT2021 14:25:27 37.0N 118.3W Mw=3.5 EMSC CENTRAL CALIFORNIA
O: 06OCT2021 15:45:27 37.0N 118.3W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137632 37.4N 118.6W 2.5-4.8 AAAAA California/Nevada area
O: 6OCT2021 20:59:32 38.2N 118.0W ml=2.1 EMSC NEVADA
P: 7OCT2021 137634 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area
O: 7OCT2021 06:55:11 39.5N 123.0W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 4OCT2021 137641 38.8N 122.8W 2.5-4.7 BAAAA Central California
O: 7OCT2021 02:18:48 40.6N 122.4W Md=2.6 EMSC NORTHERN CALIFORNIA
P: 7OCT2021 137710 40.0N 120.9W 2.5-4.6 AAAAA Northern California
NEIC reported this earthquake of M 2.6 in Northern California was felt with intensity II-III in the area(s) of Northern California at Shasta Lake and Redding.
O: 6OCT2021 07:57:55 41.0N 121.7W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 3OCT2021 137710 40.3N 121.2W 2.5-4.8 BAAAA Northern California
ALASKA
O: 6OCT2021 09:01:35 56.3N 156.5W ML=3.1 EMSC ALASKA PENINSULA
P: 29SEP2021 137444 54.8N 158.7W 3.5-5.0 CBBAA Alaska Peninsula
O: 6OCT2021 19:55:29 59.7N 152.8W ML=3.1 EMSC SOUTHERN ALASKA
P: 5OCT2021 137749 60.2N 151.7W 3.2-5.3 AAAAA Central Alaska
O: 7OCT2021 06:02:57 60.1N 141.4W ML=3.4 EMSC SOUTHERN ALASKA
P: 28SEP2021 137470 61.0N 140.0W 3.2-4.9 CAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 6OCT2021 14:15:25 44.9N 125.1W Ml=2.0 EMSC OFFSHORE OREGON
ROCKY MOUNTAINS REGION
O: 06OCT2021 13:28:01 31.6N 104.5W ML=2.2 EMSC WESTERN TEXAS
O: 06OCT2021 09:09:15 31.7N 103.9W ML=2.0 EMSC WESTERN TEXAS
O: 06OCT2021 15:48:07 31.7N 104.3W ML=2.4 EMSC WESTERN TEXAS
O: 07OCT2021 06:50:44 31.7N 104.4W ML=2.5 EMSC WESTERN TEXAS
O: 6OCT2021 07:42:26 31.6N 104.3W ML=2.4 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 AAAAA SW U.S.A
O: 6OCT2021 23:35:03 44.3N 115.1W ML=2.6 EMSC SOUTHERN IDAHO
O: 06OCT2021 20:57:30 44.4N 115.2W Ml=2.9 EMSC SOUTHERN IDAHO
P: 8OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
No earthquakes of M>=3 were located in Hawaii.
MODERATE QUAKE SHAKES NORTHERN HONSHU, JAPAN WITH TYPHOON MINDULLE
EARTHQUAKE SUMMARY FOR OCTOBER 5, 2021
The strongest earthquake in the world today was an M 5.6 off the east coast of northern Honshu, Japan. NEIC reported it was felt with maximun intensity VII in Miyako, Iwate and VI in Iwate and Tono with V in Nachinohe, Aomori; IV in Misawa, Morioka, Kesennuma, and III in Aomori, Sendai and Namie, Fukushima. This earthquake may have been promoted by stresses from Typhoon Mindulle which passed over this epicenter two days ago as reported in previous issues of this summary:
"Super Typhoon Mindulle (TS 20W) continued in the area east of Honshu, Japan today with winds up to 70 kts. This system is moving to the northeast and is currently south of eastern Honshu, Japan. It is expected to track north reaching areas south of Honshu, Japan this week. Major seismic enhancement is possible in the area of Central and eastern Honshu in the next several days as this storm passes to the east." (October 2-3, 2021)
Today's event is the strongest within about 200 km of this epicenter in the current year. An M 6.3 hit the are about 100 km to the north on December 20, 2020, the last such event in the region. Forecast 137408 had expected today's activity within about 25 km at the end of September or in early October.
O: 05OCT2021 22:33:30 40.0N 142.2E ML=4.0 EMSC NEAR EAST COAST OF HONSHU, JAPAN
O: 05OCT2021 14:22:02 40.4N 143.9E mb=4.5 EMSC OFF EAST COAST OF HONSHU, JAPAN
O: 5OCT2021 17:46:02 40.0N 142.2E Mw=5.6 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 28SEP2021 137408 40.0N 142.0E 3.5-5.5 CAAAA Hokkaido, Japan
An earthquake of M 5.4 also occurred in the Ryukyu Islands of Japan today.
NEIC reported these earthquakes of M 5.4 and an aftershock of 5.2 in the Ryukyu Islands, Japan were felt with intensity II-III in the area(s) of the Ryukyu Islands, Japan at Okinawa. This is the strongest earthquake in the Ryukyu Islands in more than a year. This shallow focus earthquake is the strongest in the Ryukyu Islands within about 150 km of this epicenter since an M 5.4 on August 8, 2012. Forecast 137622 had expected this activity around October 3.
This activity is at 142 degrees from the M 8.1 in the South Sandwich Islands of August 12 and may have been promoted by energy from that source.
O: 05OCT2021 17:30:28 25.8N 125.1E Mw=5.4 EMSC SOUTHWESTERN RYUKYU ISL., JAPAN
O: 5OCT2021 18:03:43 25.6N 125.1E Mw=5.2 EMSC SOUTHWESTERN RYUKYU ISL., JAPA
P: 3OCT2021 137622 25.0N 123.0E 4.0-5.6 AABAA Ryukyu Islands
The strongest earthquake in the U.S. or Canada today was an M 4.5-4.6 in the current eruption at Kilauea, Hawaii. NEIC reported this event was felt with intensity IV in Hawaii at Hawaii National Park, Pahala, Volcano, with III in Naalehu, Captain Cook, Pahoa, Mountain View, Hilo, Kurtistown and Holualoa.
This activity was apparently triggered by the new moon. It occurred near the maximum stress associated with the current new moon as described in previous issues of this summary as:
"The New moon will arrive at 11:05 UT on October 6. Longitudes which are at local solar noon at this time are near 15 East while those at local solar midnight are near 165 West longitude. In the west these include most areas of Europe and Africa and in the east the central Aleutians and the Alaska Peninsula, Hawaii and the Tonga-Fiji-Kermadec arc. These area are the most likely to see a strong tidally triggered earthquake in the next week. Other areas may also see tidal triggering. These are most likely to occur near local solar midnight and local solar noon. The possibility of a strong to major earthquake is considered moderate to strong before October 10." (October 3-5, 2021)
The last earthquake in the area of Kilauea, Hawaii with greater magnitude than M 4.6 was an M 5.5 on March 13, 2019. An M 4.5 also occurred at exactly the same depth (32.7 km) as today's event on June 18, 2021. Forecast 137594 had expected today's event, part of the current eruption of Kilauea, around October 6.
O: 06OCT2021 06:39:23 19.2N 155.5W ML=3.4 EMSC ISLAND OF HAWAII, HAWAII
O: 6OCT2021 06:36:55 19.3N 155.5W ML=4.5 EMSC ISLAND OF HAWAII, HAWAII
O: 6OCT2021 06:36:55 19.3N 155.5W ML=4.6 ANSS ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 AAAAA Hawaii
Elsewhere in the U.S. and Canada a series of moderate earthquakes occurred in the Unimak Island region of Alaska today with M 3.7, 4.4 and 4.5. These may be aftershocks of an M 5.1 event on September 9, 2021 with the last new moon. Forecast 137743 had expected today's events within about 100 km of these epicenters in the Unimak Island area was likely around October 7.
O: 06OCT2021 03:42:21 53.5N 163.4W mb=4.5 EMSC UNIMAK ISLAND REGION, ALASKA
O: 06OCT2021 05:21:53 53.7N 163.6W ml=3.7 EMSC UNIMAK ISLAND REGION, ALASKA
O: 6OCT2021 06:42:48 53.4N 163.5W mb=4.4 EMSC UNIMAK ISLAND REGION, ALASKA
P: 7OCT2021 137743 54.0N 164.9W 3.5-4.9 AAAAA Unimak Islands, Aleutians
A set of unusual earthquakes in northwestern Canada also occurred today. These included an M 3.9 near Grande Prairie, Alberta; an M 3.3 in the Northern Yukon Territory, Canada and an M 3.7-4.0 near Beaver Creek, Yukon Territory about 500 km to the southwest of this event. Forecasts 137445, 137756 and 137470 had expected this activity in late September or early October. None of these events were reported felt.
O: 5OCT2021 19:16:13 54.5N 118.5W ML=3.9 EMSC ALBERTA, CANADA
O: 05OCT2021 19:16:13 54.5N 118.5W MB=3.9 ECAN Grande Prairie, AB
P: 30SEP2021 137445 56.0N 120.0W 2.0-4.0 BBAAA Alberta
O: 05OCT2021 07:28:47 66.0N 135.1W MB=3.3 ECAN Fort McPherson, NT
O: 5OCT2021 07:28:47 66.0N 135.1W ML=3.3 EMSC NORTHERN YUKON TERRITORY, CANA
P: 9OCT2021 137756 66.9N 135.8W 3.0-4.8 BAAAA Northern Alaska
NEIC reported the earthquake of M 3.9-4.0 in East-central Alaska was felt with intensity II-III in the area(s) of East-central Alaska at Palmer.
O: 05OCT2021 18:24:30 62.2N 141.6W MB=4.0 ECAN Beaver Creek, YT
O: 5OCT2021 18:24:29 62.2N 141.6W ML=3.7 EMSC CENTRAL ALASKA
P: 28SEP2021 137470 61.0N 140.0W 3.2-4.9 CBAAA Central Alaska
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: 5OCT2021 23:27:56 30.4N 94.8E mb=4.5 EMSC EASTERN XIZANG
P: 9OCT2021 137688 33.0N 92.0E 3.8-5.2 BCBAA Xizang
O: 5OCT2021 07:59:57 36.9N 66.7E Mw=5.1 EMSC CENTRAL AFGHANISTAN
P: 6OCT2021 137647 36.0N 69.0E 3.8-5.4 AABAA Hindu Kush/Pakistan
NEIC reported this earthquake of M 5.1 in Afghanistan was felt with intensity IV in the area(s) of Afghanistan at Mazar-e Sharif Bain; IV in Sar0e Pul, Albak, Samangan and II-III in Shebergan, and in Uzbekistan at Termiz, Qarshi, Tashkent; in Dushanbe, Tajikistan and Turkmenabat, Turkmenistan.
INDONESIA AND PHILIPPINES
O: 5OCT2021 08:51:07 2.8N 122.3E mb=4.5 EMSC CELEBES SEA
P: 4OCT2021 137549 1.0N 122.0E 4.0-5.4 ABAAA Celebes Sea
O: 5OCT2021 16:10:37 4.1S 133.3E mb=4.4 EMSC NEAR S COAST OF PAPUA, INDONES
P: 1OCT2021 137582 4.0S 134.0E 4.0-5.4 BAAAA West Irian, PNG
O: 5OCT2021 14:45:49 4.9N 127.2E mb=4.4 EMSC KEPULAUAN TALAUD, INDONESIA
P: 6OCT2021 137556 5.0N 128.0E 4.0-5.4 AAAAA Halmahera
O: 5OCT2021 20:59:35 5.8S 131.0E mb=4.6 EMSC BANDA SEA
P: 5OCT2021 137584 5.0S 130.0E 4.0-5.4 AAAAA West Irian, PNG
O: 6OCT2021 06:20:02 6.1S 103.0E ML=4.5 EMSC SOUTHWEST OF SUMATRA, INDONESI
P: 1OCT2021 137578 6.0S 102.0E 4.0-5.4 BAAAA So. of Sumatera
O: 5OCT2021 20:45:28 7.9S 128.5E ML=4.5 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 4OCT2021 137562 7.0S 128.0E 4.0-5.6 AAAAA Banda Sea
O: 5OCT2021 11:00:25 8.1S 118.1E mb=4.1 EMSC SUMBAWA REGION, INDONESIA
P: 7OCT2021 137581 8.0S 119.0E 4.0-5.4 AAAAA Sumbawa Island area
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 5OCT2021 19:37:47 6.9N 73.0W mb=4.8 EMSC NORTHERN COLOMBIA
P: 2OCT2021 137553 7.0N 73.0W 4.0-5.5 BAAAA Colombia
NEIC reported this earthquake of M 4.8 in Colombia was felt with intensity II-III in the area(s) of Colombia at Piedecuesta, Santander.
O: 6OCT2021 01:02:30 9.5N 84.9W ML=4.1 EMSC COSTA RICA
P: 2OCT2021 137554 9.0N 85.0W 3.5-4.9 BAAAA Costa Rica
O: 6OCT2021 01:34:28 15.7N 97.4W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 6OCT2021 137605 15.0N 97.0W 3.5-5.6 AAAAA Oaxaca, Mexico
O: 5OCT2021 10:28:27 16.2N 95.0W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO
P: 4OCT2021 137589 16.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 5OCT2021 08:56:32 18.5N 71.2W ML=3.1 EMSC DOMINICAN REPUBLIC
P: 6OCT2021 137609 19.0N 71.0W 3.4-4.9 AAAAA Puerto Rico
O: 6OCT2021 04:01:56 18.8N 67.4W Md=3.1 EMSC PUERTO RICO REGION
P: 5OCT2021 137607 19.0N 67.0W 3.4-5.0 AAAAA Puerto Rico
O: 05OCT2021 09:55:54 18.7N 73.5W ML=3.5 EMSC HAITI REGION
O: 05OCT2021 10:31:14 18.7N 73.6W ML=3.4 EMSC HAITI REGION
O: 6OCT2021 01:34:11 19.9N 72.9W ML=3.2 EMSC HAITI REGION
P: 7OCT2021 137609 20.0N 74.0W 3.4-4.9 AAAAA Puerto Rico
O: 5OCT2021 09:23:15 20.5S 70.0W mb=4.2 EMSC TARAPACA, CHILE
P: 5OCT2021 137790 20.0S 71.0W 4.0-5.8 AAAAA So. Peru/Bolivia
NEIC reported this earthquake of M 4.2 in Northern Chile was felt with intensity II-III in the area(s) of Northern Chile in Iquique, Tarapaca.
O: 6OCT2021 01:55:33 45.7S 77.7W mb=4.2 EMSC OFF COAST OF AISEN, CHILE
P: 10OCT2021 137804 43.0S 83.0W 4.0-5.9 BCCAA Chile Rise
AFRICA AND EUROPE
O: 5OCT2021 07:54:08 36.5N 27.2E ML=4.1 EMSC DODECANESE IS.-TURKEY BORDER R
P: 6OCT2021 137629 36.0N 27.0E 3.0-5.1 AAAAA Aegean Sea
O: 5OCT2021 18:52:11 36.9N 9.0E mb=4.2 EMSC TUNISIA
P: 3OCT2021 137651 39.0N 14.0E 3.0-4.6 ACCAA Mediterranean/Sicily
O: 5OCT2021 16:14:10 63.9N 22.2W ML=3.3 EMSC ICELAND REGION
P: 2OCT2021 137754 64.0N 25.0W 3.0-4.6 BABAA Iceland area
O: 05OCT2021 07:19:36 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 08:29:25 28.6N 17.9W ML=3.6 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 09:31:09 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 09:31:09 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 12:14:47 28.6N 17.8W ML=3.5 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 13:57:06 28.6N 17.8W ML=3.6 EMSC CANARY ISLANDS, SPAIN REGION
O: 5OCT2021 07:10:36 28.6N 17.8W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
P: 24SEP2021 137308 28.0N 18.0W 3.0-4.5 CAAAA Canary Islands
SOUTHWEST PACIFIC
O: 5OCT2021 11:46:01 10.2S 161.6E mb=4.7 EMSC SOLOMON ISLANDS
P: 3OCT2021 137771 10.0S 160.0E 4.0-5.5 AAAAA No. of Santa Cruz Islands
P: 9OCT2021 137771 10.0S 162.0E 4.0-5.4 BAAAA No. of Santa Cruz Islands
O: 5OCT2021 16:08:06 17.9S 178.4W mb=4.5 EMSC FIJI REGION
P: 9OCT2021 137779 17.0S 177.0W 4.0-5.7 BAAAA Tonga Islands
OCEAN RIDGES
O: 5OCT2021 09:07:32 59.1S 23.0W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION
P: 6OCT2021 137813 60.0S 26.0W 4.0-5.6 AABAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 6OCT2021 01:01:02 32.2S 179.7E ML=4.2 EMSC SOUTH OF KERMADEC ISLANDS
P: 4OCT2021 137803 32.0S 179.0E 4.0-5.5 AAAAA So. Kermadec Islands
O: 6OCT2021 03:34:35 37.8S 176.5E ML=4.0 EMSC NORTH ISLAND OF NEW ZEALAND
P: 2OCT2021 137801 38.0S 178.0E 3.0-4.5 BAAAA North Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 05OCT2021 17:30:28 25.8N 125.1E Mw=5.4 EMSC SOUTHWESTERN RYUKYU ISL., JAPAN
O: 5OCT2021 18:03:43 25.6N 125.1E Mw=5.2 EMSC SOUTHWESTERN RYUKYU ISL., JAPA
P: 3OCT2021 137622 25.0N 123.0E 4.0-5.6 AABAA Ryukyu Islands
O: 05OCT2021 22:33:30 40.0N 142.2E ML=4.0 EMSC NEAR EAST COAST OF HONSHU, JAPAN
O: 05OCT2021 14:22:02 40.4N 143.9E mb=4.5 EMSC OFF EAST COAST OF HONSHU, JAPAN
O: 5OCT2021 17:46:02 40.0N 142.2E Mw=5.6 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 28SEP2021 137408 40.0N 142.0E 3.5-5.5 CAAAA Hokkaido, Japan
O: 6OCT2021 02:55:30 43.2N 146.8E mb=4.5 EMSC KURIL ISLANDS
P: 7OCT2021 137694 43.0N 146.0E 3.5-5.7 AAAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 05OCT2021 14:05:32 30.6N 114.2W ML=3.8 EMSC GULF OF CALIFORNIA
O: 05OCT2021 14:45:39 30.6N 114.0W ML=3.6 EMSC GULF OF CALIFORNIA
O: 05OCT2021 21:26:20 31.5N 114.5W ML=3.3 EMSC GULF OF CALIFORNIA
O: 5OCT2021 19:38:00 30.5N 114.2W ML=3.6 EMSC GULF OF CALIFORNIA
P: 8OCT2021 137663 30.2N 114.1W 2.0-4.0 BAAAA SW U.S.A
O: 5OCT2021 17:52:14 33.1N 115.6W Ml=2.7 EMSC SOUTHERN CALIFORNIA
O: 5OCT2021 15:32:23 33.8N 116.1W ML=2.7 EMSC SOUTHERN CALIFORNIA
O: 5OCT2021 15:32:23 33.8N 116.1W ML=2.9 ANSS SOUTHERN CALIFORNIA
P: 6OCT2021 137667 33.0N 115.9W 2.5-4.8 AAAAA So. California
NEIC reported the earthquake of M 2.9 in Southern California was felt with intensity II-III in the area(s) of Southern California at Indio, Palm Desert and Thermal.
NEIC reported the earthquake of M 2.7 in Southern California was felt with intensity II-III in the area(s) of Southern California at Brawley.
O: 5OCT2021 10:53:49 36.0N 117.7W Ml=2.1 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137675 35.9N 117.7W 2.5-4.8 AAAAA So. California
O: 06OCT2021 03:08:46 36.7N 121.3W Md=2.1 EMSC CENTRAL CALIFORNIA
O: 5OCT2021 20:13:06 36.7N 121.3W Md=2.4 EMSC CENTRAL CALIFORNIA
P: 8OCT2021 137638 36.4N 121.0W 2.5-4.7 BAAAA Central California
O: 05OCT2021 11:15:00 37.4N 117.1W ml=2.3 EMSC NEVADA
O: 05OCT2021 13:50:29 37.4N 117.1W ml=2.3 EMSC NEVADA
O: 05OCT2021 18:02:19 37.4N 117.1W ml=2.4 EMSC NEVADA
O: 5OCT2021 09:32:58 37.4N 117.1W ml=2.3 EMSC NEVADA
P: 4OCT2021 137631 37.2N 117.3W 2.5-4.6 AAAAA California/Nevada area
O: 05OCT2021 22:49:16 38.5N 119.4W Md=2.1 EMSC CENTRAL CALIFORNIA
O: 06OCT2021 06:51:49 38.6N 119.2W ml=2.2 EMSC NEVADA
O: 6OCT2021 06:58:31 38.1N 119.0W ml=2.0 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137634 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area
O: 5OCT2021 07:29:52 38.2N 117.8W ml=2.1 EMSC NEVADA
O: 5OCT2021 22:44:39 38.2N 119.5W ml=2.2 EMSC CENTRAL CALIFORNIA
P: 5OCT2021 137635 38.7N 119.7W 2.5-4.5 AAAAA California/Nevada area
O: 5OCT2021 15:54:38 40.5N 125.0W Ml=3.2 EMSC OFFSHORE NORTHERN CALIFORNIA
O: 05OCT2021 18:21:53 40.5N 124.4W Md=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 5OCT2021 137711 40.3N 124.2W 2.5-4.6 AAAAA Off Coast of No. Calif
P: 29SEP2021 137425 40.5N 125.8W 2.5-4.6 CAAAA Off Coast of No. Calif
NEIC reported this earthquake of M 3.2 off the coast of Northern California was felt with intensity II-III in the area(s) of Northern California at Eureka.
ALASKA
O: 5OCT2021 14:42:30 51.1N 178.2W ML=3.1 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
P: 7OCT2021 137728 51.8N 178.0W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians
O: 06OCT2021 03:42:21 53.5N 163.4W mb=4.5 EMSC UNIMAK ISLAND REGION, ALASKA
O: 06OCT2021 05:21:53 53.7N 163.6W ml=3.7 EMSC UNIMAK ISLAND REGION, ALASKA
O: 6OCT2021 06:42:48 53.4N 163.5W mb=4.4 EMSC UNIMAK ISLAND REGION, ALASKA
P: 7OCT2021 137743 54.0N 164.9W 3.5-4.9 AAAAA Unimak Islands, Aleutians
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 5OCT2021 07:20:22 47.2N 122.1W Md=2.2 EMSC PUGET SOUND REGION, WASHINGTON
P: 2OCT2021 137724 46.9N 122.0W 2.0-4.5 BAAAA Washington state, U.S.
O: 5OCT2021 13:49:19 47.7N 120.0W Md=2.0 EMSC WASHINGTON
P: 9OCT2021 137724 47.7N 120.3W 2.0-4.2 BAAAA Washington state, U.S.
O: 5OCT2021 19:16:13 54.5N 118.5W ML=3.9 EMSC ALBERTA, CANADA
O: 05OCT2021 19:16:13 54.5N 118.5W MB=3.9 ECAN Grande Prairie, AB
P: 30SEP2021 137445 56.0N 120.0W 2.0-4.0 BBAAA Alberta
O: 05OCT2021 07:28:47 66.0N 135.1W MB=3.3 ECAN Fort McPherson, NT
O: 5OCT2021 07:28:47 66.0N 135.1W ML=3.3 EMSC NORTHERN YUKON TERRITORY, CANA
P: 9OCT2021 137756 66.9N 135.8W 3.0-4.8 BAAAA Northern Alaska
O: 05OCT2021 18:24:30 62.2N 141.6W MB=4.0 ECAN Beaver Creek, YT
O: 5OCT2021 18:24:29 62.2N 141.6W ML=3.7 EMSC CENTRAL ALASKA
P: 28SEP2021 137470 61.0N 140.0W 3.2-4.9 CBAAA Central Alaska
NEIC reported this earthquake of M 3.9-4.0 in East-central Alaska was felt with intensity II-III in the area(s) of East-central Alaska at Palmer.
O: 5OCT2021 18:45:30 48.9N 128.8W MB=3.3 ECAN Port Alice, BC
P: 3OCT2021 137730 50.0N 128.0W 3.0-5.2 ABAAA British Colombia
ROCKY MOUNTAINS REGION
O: 05OCT2021 11:55:04 31.8N 103.8W ML=2.6 EMSC WESTERN TEXAS
O: 6OCT2021 01:46:47 31.7N 104.4W ML=2.7 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 AAAAA SW U.S.A
O: 05OCT2021 19:12:30 44.4N 115.2W Ml=2.4 EMSC SOUTHERN IDAHO
O: 5OCT2021 12:39:01 44.4N 115.2W Ml=2.2 EMSC SOUTHERN IDAHO
P: 4OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 5OCT2021 08:13:07 36.5N 89.6W Md=2.1 EMSC SOUTHEASTERN MISSOURI
P: 4OCT2021 137654 36.7N 89.7W 2.0-4.2 AAAAA New Madrid area
HAWAII
O: 06OCT2021 06:39:23 19.2N 155.5W ML=3.4 EMSC ISLAND OF HAWAII, HAWAII
O: 6OCT2021 06:36:55 19.3N 155.5W ML=4.5 EMSC ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 AAAAA Hawaii
EUROPE ACTIVE NEAR NEW MOON
EARTHQUAKE SUMMARY FOR OCTOBER 4, 2021
A series of unusual to moderate earthquakes occurred in Europe today with the
coming New Moon. The largest of these was an M 4.3 near the Swiss-French-Italian
border, but other unusual events occurred in Turkey and the Dodecanese Islands, Greece and the eruption of the volcanic eruption in La Palma, Canary Islands intensified.
An unusually large M 4.3 earthquake shook the region of Switzerland and Italy today. NEIC reported maximum intensity shaking in Switzerland at Sion Wallis; III in Italy at Aosta Valle d Aosta, Issogne, in France at Bassens Rhone-Alpes and in Karisfeld, Bayern Germany. This event may have been promoted by high tidal stresses associated with tomorrow's new moon as previously noted in this summary:
"The New moon will arrive at 11:05 UT on October 6. Longitudes which are at local solar noon at this time are near 15 East while those at local solar midnight are near 165 West longitude. In the west these include most areas of Europe and Africa and in the east the central Aleutians and the Alaska Peninsula and the Tonga-Fiji-Kermadec arc. These area are the most likely to see a strong tidally triggered earthquake in the next week. Other areas may also see tidal triggering. These are most likely to occur near local solar midnight and local solar noon. The possibility of a strong to major earthquake is considered moderate to strong before October 10." (October 4-5, 2021)
The last earthquake of M>=4.3 within about 150 km of this epicenter in northern Italy was an M 4.4 on October 24, 2016. Forecast 137690 had expected today's event was likely in this area around October 6. This earthquake is located at 103-104 degrees from the M 7.1 in Mindanao, Philippines of August 11, 2021 and may have been promoted by energy from that source. Other earthquakes at this distance from Mindanao today occurred as an M 3.8 in Central California, in Southern Idaho with M 2.9, and in northern California and Nevada.
O: 5OCT2021 05:39:25 46.0N 7.5E ML=4.3 ANSS SWITZERLAND
O: 5OCT2021 05:39:25 46.0N 7.5E ML=4.1 EMSC NORTHERN ITALY
P: 6OCT2021 137690 45.0N 8.0E 3.0-5.3 AAAAA Austria
NEIC reported the earthquake of M 4.4 in Dodecanese Islands, Greece was felt with intensity II-III in the area(s) of Greece at Kos.
O: 4OCT2021 14:03:23 36.5N 27.2E mb=4.4 EMSC DODECANESE IS.-TURKEY BORDER R
P: 6OCT2021 137629 36.0N 27.0E 3.0-5.1 AAAAA Aegean Sea
The eruption at La Palma, Canary Islands, Spain also intensified today becoming explosive with falling pyroclasts and bombs. This eruptio hs forced the evacuation of more than 6000 residents and destroyed at least 946 houses since it began on September 19. The largest earthquake yet in the current eruption occurred today with M 3.9-4.0 and was included among a series of other earthquakes of similar size, unlike previous eruptive phases where the strongest associated earthquakes were in the M 3-3.5 range. An M 3.8-3.9 also occurred in the Canary Islands just prior to the eruption in mid-September on September 14.
Forecast 137308 had expected today's activity in late September or early October.
O: 04OCT2021 18:58:51 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 03:36:38 28.6N 17.8W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
O: 4OCT2021 14:30:59 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
P: 24SEP2021 137308 28.0N 18.0W 3.0-4.5 AAAAA Canary Islands
An earthquake of M 3.8 rocked Central California today. NEIC reported intensity IV in California at Soledad, and II-III in Gonzales, Salinas, Hollister, Paicines, Carmel Valley among others. NEIC reported an aftershock of M 2.7 in Northern California was felt with intensity II-III in the area(s) of Northern California at Discovery Bay, Byron, Brentwood, Antioch, Tracy, San Ramon, Stanford, Felton, Santa Cruz and Los Banos. NEIC reported other aftershocks of M 2.8 and 2.8 in Central California was felt with intensity II-III in the area(s) of Central California at Greenfield, Los Banos, Salinas and Dos Palos.
The last earthquake of M>=3.8 in this region of California was an M 4.1 on August 31, 2021. Other events in the area in the past year included an M 5.2 on January 17, 2021. Forecast 137649 had expected today's seismic enhancement in this area was likely around October 3.
O: 04OCT2021 23:07:48 36.6N 121.3W ML=3.3 EMSC CENTRAL CALIFORNIA
O: 04OCT2021 23:07:48 36.6N 121.3W ML=3.8 ANSS CENTRAL CALIFORNIA
O: 05OCT2021 05:03:36 36.6N 121.3W Md=2.0 EMSC CENTRAL CALIFORNIA
O: 4OCT2021 16:36:50 37.9N 121.6W ML=2.5 EMSC NORTHERN CALIFORNIA
P: 3OCT2021 137640 37.9N 122.0W 2.5-4.7 AAAAA Central California
A series of minor earthquake hit the Yellowstone National Park, Wyoming today. The last similar swarm in Yellowstone occurred on September 8, 2021 with the last new moon. Today's activity was also probably promoted by the new moon of September 6. At that time this summary noted in this regard:
"Seismicity in the Yellowstone National Park area of Wyoming was enhanced today. A pair of earthquakes of M 3.0 each was recorded. This is the strongest activity in Yellowstone since an M 3.6 on July 17, 2021. It occurred near local solar noon and may have been promoted by energy from the M 7.0 in Mexico or geomagnetic or tidal stresses." (September 8, 2021)
Forecast 137726 had expected today's activity in Yellowstone was likely around
October 4.
O: 04OCT2021 22:39:56 44.8N 110.6W Ml=2.4 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 04OCT2021 23:38:47 44.8N 110.6W Ml=2.1 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 05OCT2021 00:30:08 44.8N 110.6W ML=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 4OCT2021 22:37:02 44.8N 110.6W Ml=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING
P: 4OCT2021 137726 44.2N 110.3W 2.0-4.1 AAAAA Yellowstone/Wyoming
An M 4.6 in the region of Negros, Philippines was widely felt today.
"A tropical cyclone may be forming over Negros, Philippines. This storm is currently located at 10N 122W and moving to the west with winds up to 22 kts. Seismic enhancement in the central Philippines may occur as this storm moves through the area." (October 4, 2021)
Today's event occurred as this storm passed over the epicenter. Two earthquakes of equal or greater magnitude have occurred in Negros, Philippines in the past year - an M 4.8 on September 5 and an M 4.6 on June 29, 2021.
Forecast 137552 had expected activity in this area in early October.
NEIC reported this earthquake of M 4.6 in Negros, Philippines was felt with intensity II-III in the area(s) of Negros, Philippines at Sipalay, Western Visayas.
O: 4OCT2021 20:12:05 9.9N 122.1E mb=4.6 EMSC NEGROS, PHILIPPINES
P: 6OCT2021 137552 8.0N 125.0E 4.0-5.4 AABAA Central Philippines
Today's earthquake and forecast map follows. Stippled White areas are nodal distances (360/n, n an integer) from the earthquake of M 7.2 in the area of the Southern Vanuatu, October 2, 2021, where promoted seismicity is considered likely.
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: 5OCT2021 02:38:20 30.4N 94.8E mb=4.7 EMSC EASTERN XIZANG
P: 9OCT2021 137688 33.0N 92.0E 3.8-5.2 BCBAA Xizang
O: 5OCT2021 00:20:10 36.5N 71.3E mb=4.6 EMSC HINDU KUSH REGION, AFGHANISTAN
O: 4OCT2021 21:45:29 37.0N 69.9E mb=4.4 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 6OCT2021 137647 36.0N 69.0E 3.8-5.4 AAAAA Hindu Kush/Pakistan
NEIC reported this earthquake of M 4.6 in Hindu Kush, Afghanistan was felt with intensity II-III in the area(s) of Hindu Kush, Afghanistan at Jurm, Badahsan (IV) and in Termiz, Uzbekistan.
O: 4OCT2021 16:10:25 38.3N 74.0E mb=4.4 EMSC TAJIKISTAN
P: 5OCT2021 137647 39.0N 72.0E 3.8-5.4 AABAA Hindu Kush/Pakistan
O: 5OCT2021 02:10:32 56.4N 163.3E mb=4.1 EMSC NEAR EAST COAST OF KAMCHATKA
P: 3OCT2021 137735 56.0N 165.0E 4.0-5.7 AAAAA Komandorsky Isl
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 4OCT2021 10:59:18 1.1N 126.9E ML=4.6 EMSC MOLUCCA SEA
O: 5OCT2021 05:44:23 2.9N 128.1E mb=4.4 EMSC HALMAHERA, INDONESIA
P: 1OCT2021 137558 3.0N 126.0E 4.0-5.4 BABAA Mindanao, Philippines
O: 4OCT2021 14:28:46 3.7S 129.6E Mw=5.2 EMSC SERAM, INDONESIA
P: 4OCT2021 137564 3.0S 129.0E 4.0-5.6 AAAAA Ceram area
NEIC reported this earthquake of M 5.3 in Seram, Indonesia was felt with intensity IV in the area(s) of Seram, Indonesia at Ambon.
O: 4OCT2021 19:06:41 5.5S 142.2E mb=4.9 EMSC NEW GUINEA, PAPUA NEW GUINEA
P: 3OCT2021 137573 4.0S 141.0E 4.0-5.4 ABAAA Papua New Guinea
O: 04OCT2021 20:40:00 6.4S 130.6E ML=4.8 EMSC BANDA SEA
O: 5OCT2021 04:11:07 6.1S 129.8E ML=4.5 EMSC BANDA SEA
P: 8OCT2021 137584 6.0S 130.0E 4.0-5.5 BAAAA West Irian, PNG
O: 4OCT2021 10:02:18 8.4S 128.0E ML=4.7 EMSC TIMOR SEA
P: 4OCT2021 137562 7.0S 128.0E 4.0-5.6 ABAAA Banda Sea
O: 4OCT2021 20:12:05 9.9N 122.1E mb=4.6 EMSC NEGROS, PHILIPPINES
P: 6OCT2021 137552 8.0N 125.0E 4.0-5.4 AABAA Central Philippines
CENTRAL AND SOUTH AMERICA
O: 4OCT2021 21:32:37 9.5S 74.6W mb=4.7 EMSC CENTRAL PERU
P: 29SEP2021 137488 10.0S 75.0W 3.5-5.2 BAAAA Brazil
O: 4OCT2021 07:57:57 14.7N 92.4W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
O: 4OCT2021 21:20:34 14.9N 92.1W ML=4.0 EMSC GUATEMALA
P: 2OCT2021 137592 16.0N 92.0W 3.5-5.1 ABAAA Guatemala
O: 5OCT2021 01:19:55 18.5S 67.1W mb=4.4 EMSC ORURO, BOLIVIA
P: 3OCT2021 137776 19.0S 69.0W 4.0-5.9 AABAA So. Peru/Bolivia
O: 4OCT2021 18:32:43 18.6N 104.4W ML=4.1 EMSC OFFSHORE COLIMA, MEXICO
P: 7OCT2021 137601 19.0N 104.0W 3.5-5.2 BAAAA Michoacan, Mexico
O: 5OCT2021 04:00:41 18.8N 64.8W Md=3.6 EMSC VIRGIN ISLANDS REGION
P: 5OCT2021 137596 19.0N 64.0W 3.0-4.9 AAAAA Leeward Islands
O: 4OCT2021 10:53:28 17.4N 101.4W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO
P: 6OCT2021 137600 17.0N 102.0W 3.5-5.1 AAAAA Michoacan, Mexico
O: 5OCT2021 04:04:44 18.0N 66.5W Md=3.0 EMSC PUERTO RICO
P: 5OCT2021 137607 19.0N 67.0W 3.4-5.0 AAAAA Puerto Rico
O: 04OCT2021 12:36:15 31.7S 72.1W Mw=4.6 EMSC OFFSHORE COQUIMBO, CHILE
O: 04OCT2021 12:42:24 31.7S 72.1W Mw=4.0 EMSC OFFSHORE COQUIMBO, CHILE
O: 4OCT2021 10:58:31 31.7S 72.1W ML=4.0 EMSC OFFSHORE COQUIMBO, CHILE
P: 6OCT2021 137795 33.0S 73.0W 4.0-5.5 ABAAA Central Chile
P: 8OCT2021 137795 32.0S 71.0W 4.0-5.8 BAAAA Central Chile
NEIC reported this earthquake of M 4.6 in Coquimbo, Chile was felt with intensity II-III in the area(s) of Coquimbo, Chile at Illapel (V); in La Ligua and Vina del Mar, Valparaiso.
AFRICA AND EUROPE
O: 04OCT2021 18:58:51 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 05OCT2021 03:36:38 28.6N 17.8W ML=3.9 EMSC CANARY ISLANDS, SPAIN REGION
O: 4OCT2021 14:30:59 28.6N 17.8W ML=3.7 EMSC CANARY ISLANDS, SPAIN REGION
O: 4OCT2021 14:03:23 36.5N 27.2E mb=4.4 EMSC DODECANESE IS.-TURKEY BORDER R
P: 6OCT2021 137629 36.0N 27.0E 3.0-5.1 AAAAA Aegean Sea
O: 5OCT2021 05:39:25 46.0N 7.5E ML=4.1 EMSC NORTHERN ITALY
P: 6OCT2021 137690 45.0N 8.0E 3.0-5.3 AAAAA Austria
SOUTHWEST PACIFIC
O: 4OCT2021 19:36:37 17.2S 173.8W mb=4.8 EMSC TONGA
P: 5OCT2021 137779 16.0S 174.0W 4.0-5.6 ABAAA Tonga Islands
O: 4OCT2021 18:32:03 23.6S 179.4E mb=4.9 EMSC SOUTH OF FIJI ISLANDS
P: 1OCT2021 137793 23.0S 179.0E 4.0-5.6 BAAAA Tonga/Fiji
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 4OCT2021 14:51:45 60.5S 27.2W mb=5.0 EMSC SOUTH SANDWICH ISLANDS REGION
P: 6OCT2021 137813 60.0S 26.0W 4.0-5.6 AAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
No earthquakes of M>=4 were recorded in the regions of Zealandia or Australia
today. GeoNet did not report any felt events in the area.
JAPAN AND KURIL ISLANDS
O: 4OCT2021 21:06:32 38.1N 142.1E mb=4.5 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 8OCT2021 137661 38.0N 141.0E 4.0-5.4 BAAAA Off East Coast Honshu
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 04OCT2021 21:21:54 31.0N 114.2W ML=3.9 EMSC GULF OF CALIFORNIA
O: 04OCT2021 21:53:32 31.3N 114.3W ML=3.4 EMSC GULF OF CALIFORNIA
O: 4OCT2021 20:33:50 31.0N 114.2W ML=3.9 EMSC GULF OF CALIFORNIA
P: 3OCT2021 137663 30.4N 114.3W 2.0-4.0 AAAAA SW U.S.A
O: 5OCT2021 00:22:54 32.3N 115.4W Ml=2.2 EMSC BAJA CALIFORNIA, MEXICO
P: 7OCT2021 137666 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 4OCT2021 23:56:01 33.7N 118.8W Ml=2.1 EMSC CHANNEL ISLANDS REG., CALIFORN
P: 7OCT2021 137670 34.0N 118.7W 2.5-4.4 BAAAA So. California
O: 4OCT2021 19:07:45 35.7N 117.6W Ml=2.2 EMSC SOUTHERN CALIFORNIA
P: 4OCT2021 137674 35.7N 118.1W 2.5-4.8 AAAAA So. California
O: 5OCT2021 00:51:48 36.5N 121.1W Md=2.8 EMSC CENTRAL CALIFORNIA
P: 8OCT2021 137638 36.4N 121.0W 2.5-4.7 BAAAA Central California
O: 04OCT2021 21:46:06 37.4N 117.1W ml=2.1 EMSC NEVADA
O: 04OCT2021 23:57:36 37.4N 117.1W ml=2.3 EMSC NEVADA
O: 05OCT2021 00:01:04 37.4N 117.1W ml=2.0 EMSC NEVADA
O: 05OCT2021 01:42:55 37.4N 117.2W ml=2.0 EMSC NEVADA
O: 05OCT2021 03:07:35 37.4N 117.1W ML=2.5 EMSC NEVADA
O: 05OCT2021 04:25:01 37.4N 117.1W ml=2.0 EMSC NEVADA
O: 05OCT2021 04:52:57 37.4N 117.1W ml=2.2 EMSC NEVADA
O: 4OCT2021 20:44:42 37.4N 117.1W ml=2.1 EMSC NEVADA
P: 4OCT2021 137631 37.2N 117.3W 2.5-4.6 AAAAA California/Nevada area
O: 5OCT2021 04:28:11 37.5N 118.8W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137632 37.4N 118.6W 2.5-4.8 AAAAA California/Nevada area
O: 5OCT2021 03:57:04 37.9N 118.6W ml=2.1 EMSC CENTRAL CALIFORNIA
P: 7OCT2021 137634 38.0N 118.8W 2.5-4.6 AAAAA California/Nevada area
O: 04OCT2021 23:07:48 36.6N 121.3W ML=3.3 EMSC CENTRAL CALIFORNIA
O: 04OCT2021 23:07:48 36.6N 121.3W ML=3.8 ANSS CENTRAL CALIFORNIA
O: 05OCT2021 05:03:36 36.6N 121.3W Md=2.0 EMSC CENTRAL CALIFORNIA
O: 4OCT2021 16:36:50 37.9N 121.6W ML=2.5 EMSC NORTHERN CALIFORNIA
P: 3OCT2021 137640 37.9N 122.0W 2.5-4.7 AAAAA Central California
O: 4OCT2021 12:47:03 38.2N 117.7W ml=2.2 EMSC NEVADA
P: 2OCT2021 137631 36.1N 118.1W 2.5-4.8 ACAAA California/Nevada area
O: 5OCT2021 01:34:01 38.5N 119.4W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 5OCT2021 137635 38.7N 119.7W 2.5-4.5 AAAAA California/Nevada area
O: 5OCT2021 03:37:59 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 4OCT2021 137641 38.8N 122.8W 2.5-4.7 AAAAA Central California
O: 04OCT2021 10:47:37 40.0N 117.9W ml=2.0 EMSC NEVADA
O: 4OCT2021 10:15:46 39.9N 117.8W ml=2.0 EMSC NEVADA
P: 26SEP2021 137404 40.0N 117.9W 2.5-4.8 CAAAA California/Nevada area
O: 5OCT2021 00:18:51 41.2N 120.3W Md=2.4 EMSC NORTHERN CALIFORNIA
P: 5OCT2021 137715 42.1N 120.3W 2.0-4.3 AAAAA Oregon state, U.S.
ALASKA
O: 4OCT2021 12:34:37 56.2N 150.0W ML=3.3 EMSC GULF OF ALASKA
P: 6OCT2021 137756 55.0N 149.0W 3.0-4.8 ABAAA Northern Alaska
O: 4OCT2021 11:06:32 56.9N 156.2W ML=3.4 EMSC ALASKA PENINSULA
P: 29SEP2021 137444 54.8N 158.7W 3.5-5.0 BBBAA Alaska Peninsula
O: 5OCT2021 04:26:30 58.7N 155.1W ml=3.4 EMSC ALASKA PENINSULA
P: 9OCT2021 137748 60.1N 153.4W 3.2-5.4 BBAAA Central Alaska
O: 5OCT2021 02:44:09 59.5N 152.4W ML=3.3 EMSC SOUTHERN ALASKA
P: 5OCT2021 137749 60.2N 151.7W 3.2-5.3 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 3OCT2021 03:56:18 57.7N 133.9W MB=3.1 ECAN Juneau, Alaska, USA
P: 3OCT2021 137742 58.0N 133.0W 3.0-4.4 AAAAA Southeast Alaska
O: 2OCT2021 23:19:42 49.1N 130.1W MB=3.8 ECAN Port Alice, BC
O: 2OCT2021 19:47:37 49.0N 129.2W MB=3.7 ECAN Port Alice, BC
P: 1OCT2021 137723 48.9N 129.3W 2.8-5.4 AAAAA Vancouver Island area
ROCKY MOUNTAINS REGION
O: 04OCT2021 18:05:05 31.7N 104.0W ML=2.5 EMSC WESTERN TEXAS
O: 04OCT2021 21:33:20 31.7N 104.5W ML=3.2 EMSC WESTERN TEXAS
O: 4OCT2021 17:21:28 31.7N 104.0W ML=2.0 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 AAAAA SW U.S.A
O: 04OCT2021 14:58:50 44.3N 115.0W Ml=2.4 EMSC SOUTHERN IDAHO
O: 04OCT2021 19:37:14 44.3N 115.0W Ml=2.2 EMSC SOUTHERN IDAHO
O: 04OCT2021 08:25:10 44.5N 115.2W Ml=2.1 EMSC SOUTHERN IDAHO
O: 4OCT2021 07:38:45 44.3N 115.0W Ml=2.9 EMSC SOUTHERN IDAHO
P: 4OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
O: 04OCT2021 22:39:56 44.8N 110.6W Ml=2.4 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 04OCT2021 23:38:47 44.8N 110.6W Ml=2.1 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 05OCT2021 00:30:08 44.8N 110.6W ML=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 4OCT2021 22:37:02 44.8N 110.6W Ml=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING
P: 4OCT2021 137726 44.2N 110.3W 2.0-4.1 AAAAA Yellowstone/Wyoming
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
O: 4OCT2021 17:17:25 19.2N 155.5W ML=3.7 EMSC ISLAND OF HAWAII, HAWAII
P: 6OCT2021 137594 19.4N 155.4W 3.0-4.8 AAAAA Hawaii
NEIC reported this earthquake of M 3.6 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Naalehu, Captain Cook, Holualoa, Kealakekoa, Curtistown, Kailua Kona, Princeville.
MODERATE QUAKE IN IRAN PROMOTED BY TC SHAHEEN-GULAB
EARTHQUAKE SUMMARY FOR OCTOBER 3, 2021
An M 5.6 earthquake was widely felt in western Iran today with some damage reported. NEIC reported it was felt with intensity VII in Khuzestan, Iran at Masjed Soleyman and Izeh; IV in Arac and al-Baarah and II-III in Ahwaz, Borujen, Mcbaakeh, Aspanada, and Salmya, Kuwait. This epicenter may have been promoted by stresses associated with Tropical Cyclone Shaheen-Gulab which is passing to the south of this epicenter at this time and was expected in previous issues of this summary as:
"Tropical Cyclone Shaheen-Gulab (03B) continued today south of eastern Iran with winds up to 85 kts. It is expected to track to the west areas south of Iran in the next several days. Some enhanced seismicity may occur in southern Iran as this storm is in the area." (October 1-3, 2021)
Today's event in Iran is the strongest within about 200 km of this epicenter since an M 5.7 more than two years ago on July 8, 2019. An M 5.6 also shook the area on September 25, 2002 but since then most activity of larger magnitude in the area has occurred about 200 km to the west of today's epicenter. Forecast 137677 and 137387 had expected today's activity within this are was likely at the end of September or in early October. This epicenter is at 105 degrees from the M 7.2 in Haiti of August 14, 2021 and may have been promoted by energy from that source.
O: 4OCT2021 02:39:27 32.3N 49.8E Mw=5.6 EMSC WESTERN IRAN
P: 4OCT2021 137677 31.0N 50.0E 3.8-5.3 ABAAA So. Iran
P: 25SEP2021 137387 32.0N 49.0E 3.8-5.3 CAAAA So. Iran
The strongest earthquake in the world today was an M 6.2 in the South Sandwich Islands. This is the strongest earthquake in the South Sandwich Islands since an M 7.1 on August 22. These are aftershocks of an M 8.1 in the area on August 12. This epicenter, like those yesterday in Brazil and the South Indian Ocean is located near 103 degrees from the M 7.2 in Vanuatu of October 2 and was probably promoted by energy from that source. An earthquake of M 5.2 in the Prince Edward Islands today was also at 103 degrees from the Vanuatu epicenter. The last earthquake within about 200 km of this epicenter with M>=5.2 was an M 6.2 on November 17, 2014. An earthquake about 200 km from this epicenter also occurred with M 5.2-5.3 on August 7, 2021. Forecast 137811 had expected the event in the Prince Edward Islands was likely around October 6 wile forecast 137813 had expected the event in the South Sandwich Islands was likely around October 6. Other activity today near 103 degrees from Vanuatu occurred as an M 4.9 in Nicaragua an M 4.6 in northern Chile, light quakes in Peninsular India and an M 3.8 in northern Kansas.
O: 4OCT2021 04:12:41 47.0S 33.7E mb=5.2 EMSC PRINCE EDWARD ISLANDS REGION
P: 6OCT2021 137811 51.0S 29.0E 4.0-5.4 ACCAA Atlantic-Indian Ridge
O: 4OCT2021 03:54:07 60.4S 27.7W Mw=6.2 EMSC SOUTH SANDWICH ISLANDS REGION
P: 6OCT2021 137813 60.0S 26.0W 4.0-5.6 AAAAA So. Sandwich Islands
The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Fox Islands, Aleutians, Alaska. This appears to be an aftershock of the M 5.1 which shook the area on October 1, 2021. Forecast 137729 had expected today's activity was likely within about 15 km of this epicenter around October 6.
O: 3OCT2021 15:53:37 52.2N 171.2W mb=4.6 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 6OCT2021 137729 52.1N 171.3W 3.5-5.3 AAAAA Andreanoff Isls, Aleutians
A light to moderate earthquake of M 3.8 was felt in north-central Kansas today. NEIC reported this earthquake of M 3.8 in Kansas was felt with intensity II-III in the area(s) of Kansas at Lindsborg, Salina, Solomon, Galva, Abilene, Marquette, McPherson and Hutchinson and IV in Gypsum and Assaria. This is the strongest earthquake in Kansas since an M 3.9 on March 14, 2021. A similar M 3.8 hit about 100 km north of today's epicenter on May 6, 2001. The only other event in Kansas in the past year of M>=3.5 was an M 3.8 on December 30, 2020. Forecast 137681 had expected today's activity within about 100 km was likely in Kansas around October 3.
O: 4OCT2021 02:58:14 38.7N 97.5W mb=3.8 EMSC KANSAS
P: 3OCT2021 137681 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains
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: 3OCT2021 13:23:20 21.2N 119.9E mb=4.6 EMSC TAIWAN REGION
O: 4OCT2021 06:07:50 24.8N 122.2E ML=4.8 TAI Hualien, Taiwan
O: 4OCT2021 06:07:50 24.8N 122.2E ML=4.9 ANSS Hualien, Taiwan
P: 3OCT2021 137622 25.0N 123.0E 4.0-5.6 AAAAA Ryukyu Islands
P: 26SEP2021 137324 21.0N 120.0E 4.0-5.4 CAAAA Taiwan
CWB reported the earthquake of M 4.8 was felt with intensity III in Yilan, II in Taipei and I in Taoyuan, Hsinchu, Taichung, Nantou and Miaoli Counties, Taiwan.
NEIC reported this earthquake of M 4.9 in Taiwan was felt with intensity II-III in the area(s) of Taiwan in Ilan and Taipei.
O: 3OCT2021 08:52:28 22.3N 85.6E ML=4.1 EMSC JHARKHAND, INDIA
P: 7OCT2021 137585 19.0N 92.0E 4.0-5.6 BCCAA Andaman Islands
O: 4OCT2021 06:07:51 24.8N 122.2E mb=4.9 EMSC TAIWAN REGION
P: 3OCT2021 137622 25.0N 123.0E 4.0-5.6 AAAAA Ryukyu Islands
O: 4OCT2021 03:24:19 30.4N 94.8E mb=4.9 EMSC EASTERN XIZANG
P: 1OCT2021 137620 25.0N 95.0E 4.0-5.7 BCAAA Myanmar
O: 4OCT2021 02:39:27 32.3N 49.8E Mw=5.6 EMSC WESTERN IRAN
P: 4OCT2021 137677 31.0N 50.0E 3.8-5.3 ABAAA So. Iran
P: 25SEP2021 137387 32.0N 49.0E 3.8-5.3 CAAAA So. Iran
INDONESIA AND PHILIPPINES
O: 3OCT2021 19:44:34 0.4S 124.5E mb=4.4 EMSC MOLUCCA SEA
P: 4OCT2021 137580 1.0S 124.0E 4.0-5.5 AAAAA Sulawesi area
O: 4OCT2021 01:35:22 1.9S 103.7E ML=4.0 EMSC SOUTHERN SUMATRA, INDONESIA
O: 4OCT2021 06:20:12 2.3S 103.7E ML=4.3 EMSC SOUTHERN SUMATRA, INDONESIA
P: 7OCT2021 137578 2.0S 100.0E 4.0-5.5 BACAA So. of Sumatera
O: 4OCT2021 00:51:21 2.3S 138.4E ML=4.3 EMSC PAPUA, INDONESIA
P: 1OCT2021 137583 5.0S 138.0E 4.0-5.5 BCAAA West Irian, PNG
O: 3OCT2021 22:05:49 6.0N 126.2E mb=4.4 EMSC MINDANAO, PHILIPPINES
P: 2OCT2021 137557 6.0N 127.0E 4.0-5.4 AAAAA Halmahera
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 03OCT2021 21:10:01 11.2N 86.8W mb=4.9 EMSC NEAR COAST OF NICARAGUA
O: 03OCT2021 21:39:30 11.2N 86.8W ML=4.2 EMSC NEAR COAST OF NICARAGUA
O: 3OCT2021 13:05:30 11.1N 86.9W ML=4.1 EMSC NEAR COAST OF NICARAGUA
P: 3OCT2021 137602 11.0N 86.0W 3.5-5.3 AAAAA Nicaragua
O: 3OCT2021 22:20:28 12.6N 88.3W ML=4.0 EMSC OFFSHORE EL SALVADOR
P: 1OCT2021 137590 13.0N 89.0W 3.5-5.5 AAAAA Coast of Central America
O: 3OCT2021 16:19:12 15.6N 95.1W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO
P: 4OCT2021 137589 16.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 3OCT2021 11:01:52 18.0N 65.9W Md=3.1 EMSC PUERTO RICO REGION
P: 2OCT2021 137607 18.0N 66.0W 3.4-5.1 AAAAA Puerto Rico
O: 3OCT2021 21:31:00 24.2S 67.3W mb=4.6 EMSC SALTA, ARGENTINA
P: 3OCT2021 137783 23.0S 66.0W 4.0-5.6 ABAAA Argentina
P: 9OCT2021 137783 24.0S 67.0W 4.0-5.4 CAAAA Argentina
O: 3OCT2021 08:38:34 36.9S 74.1W Mw=4.3 EMSC OFFSHORE BIO-BIO, CHILE
P: 28SEP2021 137525 36.0S 73.0W 4.0-5.5 BAAAA Central Chile
AFRICA AND EUROPE
O: 03OCT2021 11:11:16 28.6N 17.8W ML=3.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 03OCT2021 12:34:39 28.6N 17.8W ML=3.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 03OCT2021 22:06:59 28.6N 17.9W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
O: 03OCT2021 22:58:26 28.6N 17.8W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
O: 03OCT2021 23:07:22 28.6N 17.9W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
O: 03OCT2021 23:17:34 28.6N 17.8W ML=3.2 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 04:48:56 28.6N 17.8W ML=3.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 05:36:08 28.6N 17.8W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 05:44:27 28.6N 17.8W ML=3.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 06:01:12 28.6N 17.8W ML=3.0 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 06:17:57 28.6N 17.8W ML=3.2 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 06:20:23 28.6N 17.8W ML=3.4 EMSC CANARY ISLANDS, SPAIN REGION
O: 04OCT2021 06:44:11 28.6N 17.8W ML=3.1 EMSC CANARY ISLANDS, SPAIN REGION
O: 03OCT2021 19:14:34 28.7N 17.6W ML=3.6 EMSC CANARY ISLANDS, SPAIN REGION
O: 3OCT2021 09:08:47 28.6N 17.8W ML=3.2 EMSC CANARY ISLANDS, SPAIN REGION
P: 24SEP2021 137308 28.0N 18.0W 3.0-4.5 AAAAA Canary Islands
O: 4OCT2021 01:31:12 12.8S 45.6E ML=3.2 EMSC MAYOTTE REGION
P: 3OCT2021 137769 12.0S 45.0E 3.0-4.6 AAAAA Madagascar area
O: 3OCT2021 18:42:31 35.7N 5.1E mb=4.1 EMSC NORTHERN ALGERIA
P: 5OCT2021 137686 39.0N 0.0E 3.0-4.6 ACCAA Western Mediterranean
O: 3OCT2021 07:15:08 37.5N 30.4E mb=4.2 EMSC WESTERN TURKEY
P: 1OCT2021 137682 39.0N 31.0E 3.5-4.9 ABAAA Turkey
NEIC reported this earthquake of M 4.2 in Western Turkey was felt with intensity II-III in the area(s) of Western Turkey at Burdur.
O: 3OCT2021 12:18:13 63.9N 22.2W ML=3.5 EMSC ICELAND REGION
P: 2OCT2021 137754 64.0N 25.0W 3.0-4.6 AABAA Iceland area
SOUTHWEST PACIFIC
O: 3OCT2021 09:45:56 19.1S 169.1E mb=4.9 EMSC VANUATU
P: 5OCT2021 137786 21.0S 170.0E 4.0-5.6 ABAAA Loyalty Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 4OCT2021 04:12:41 47.0S 33.7E mb=5.2 EMSC PRINCE EDWARD ISLANDS REGION
P: 6OCT2021 137811 51.0S 29.0E 4.0-5.4 ACCAA Atlantic-Indian Ridge
O: 4OCT2021 03:54:07 60.4S 27.7W Mw=6.2 EMSC SOUTH SANDWICH ISLANDS REGION
P: 6OCT2021 137813 60.0S 26.0W 4.0-5.6 AAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 4OCT2021 06:34:11 30.1S 177.4W Mw=5.5 EMSC KERMADEC ISLANDS, NEW ZEALAND
P: 5OCT2021 137800 30.0S 179.0W 4.0-5.6 AAAAA No. Kermadec Islands
O: 4OCT2021 00:35:20 33.2S 177.6W mb=4.4 EMSC SOUTH OF KERMADEC ISLANDS
P: 29SEP2021 137534 32.0S 178.0W 4.0-5.4 BBAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 3OCT2021 08:49:38 34.4N 141.6E mb=4.6 EMSC OFF EAST COAST OF HONSHU, JAPA
P: 2OCT2021 137661 35.0N 141.0E 4.0-5.6 AAAAA Off East Coast Honshu
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 03OCT2021 07:47:31 30.8N 114.4W ML=3.5 EMSC GULF OF CALIFORNIA
O: 03OCT2021 09:44:52 30.9N 114.3W ML=3.4 EMSC GULF OF CALIFORNIA
O: 3OCT2021 09:12:34 30.7N 114.4W ML=3.6 EMSC GULF OF CALIFORNIA
P: 3OCT2021 137663 30.4N 114.3W 2.0-4.0 AAAAA SW U.S.A
O: 3OCT2021 16:37:23 31.9N 116.3W ML=2.6 EMSC BAJA CALIFORNIA, MEXICO
P: 3OCT2021 137665 32.1N 116.4W 2.5-4.9 AAAAA So. California
O: 3OCT2021 12:06:32 36.5N 121.1W Md=2.3 EMSC CENTRAL CALIFORNIA
P: 2OCT2021 137638 36.9N 121.7W 2.5-4.5 AAAAA Central California
P: 8OCT2021 137638 36.4N 121.0W 2.5-4.7 BAAAA Central California
O: 3OCT2021 12:02:00 37.2N 121.6W ML=3.1 EMSC NORTHERN CALIFORNIA
O: 3OCT2021 12:02:00 37.2N 121.6W ML=3.3 ANSS NORTHERN CALIFORNIA
P: 2OCT2021 137638 36.9N 121.7W 2.5-4.5 AAAAA Central California
P: 7OCT2021 137639 37.2N 122.1W 2.5-4.8 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 Morgan Hill, San Jose, Coyote, and Gilroy among others.
O: 3OCT2021 15:38:19 38.8N 122.8W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 4OCT2021 137641 38.8N 122.8W 2.5-4.7 AAAAA Central California
ALASKA
O: 3OCT2021 15:53:37 52.2N 171.2W mb=4.6 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 6OCT2021 137729 52.1N 171.3W 3.5-5.3 AAAAA Andreanoff Isls, Aleutians
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
No events of M>=2 were located in the northwestern U.S. or western Canada today.
ROCKY MOUNTAINS REGION
O: 03OCT2021 20:10:02 31.7N 104.3W ML=2.7 EMSC WESTERN TEXAS
O: 4OCT2021 05:00:28 31.6N 104.3W ML=3.1 EMSC WESTERN TEXAS
P: 4OCT2021 137664 31.2N 104.1W 2.0-4.0 AAAAA SW U.S.A
O: 04OCT2021 03:07:58 44.3N 115.0W ML=2.5 EMSC SOUTHERN IDAHO
O: 04OCT2021 03:18:30 44.3N 115.1W ML=3.0 EMSC SOUTHERN IDAHO
O: 4OCT2021 02:56:21 44.3N 115.1W ML=2.6 EMSC SOUTHERN IDAHO
P: 4OCT2021 137700 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
NEIC reported this earthquake of M 3.0 in Southern Idaho was felt with intensity II-III in the area(s) of Southern Idaho at Stanley and Kuna.
EASTERN U.S./CANADA
O: 4OCT2021 05:29:56 35.1N 95.4W ML=2.1 EMSC OKLAHOMA
P: 4OCT2021 137680 35.0N 97.0W 2.0-4.2 AAAAA Southern Plains
O: 03OCT2021 14:13:36 36.4N 98.2W mb=2.4 EMSC OKLAHOMA
O: 3OCT2021 14:13:36 36.4N 98.2W mb=2.4 EMSC OKLAHOMA
P: 6OCT2021 137680 36.0N 97.0W 2.0-4.2 BAAAA Southern Plains
P: 8OCT2021 137681 37.0N 98.0W 2.0-4.2 BAAAA Southern Plains
O: 4OCT2021 02:58:14 38.7N 97.5W mb=3.8 EMSC KANSAS
P: 3OCT2021 137681 39.0N 99.0W 2.0-4.1 AAAAA Southern Plains
HAWAII
O: 3OCT2021 20:45:21 19.2N 155.4W ML=3.1 EMSC ISLAND OF HAWAII, HAWAII
P: 3OCT2021 137594 19.9N 156.1W 3.0-4.8 AAAAA Hawaii
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