MODERATE EARTHQUAKE SHAKES SICHUAN, CHINA

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 15, 2021

 

The strongest earthquake felt in the world today was an M 5.4 in Sichuan, China. NEIC reported maximum intensity VII in Yngchang, Chongqing, China and VI in Zigogn, Sichuan. Intensity V was felt in Chongqing at Chongqing and Beibei and IV in Sichuan at Luzhou, Yilbin, Jiancheng, Chengdu, Dawan. An earthquake of M 5.8 occurred within about 100 km of this epicenter on June 17, 2019 following an M 6.6 on April 20, 2013 and an M 5.8 on May 13, 2008, the only events of larger magnitude within about 250 km of today's epicenter in at least 30 years. Forecast 137044 had expected today's event to the southwest of this epicenter was likely around September 15. Forecast 135608 had expected enhanced activity in this region within about 200 km of this epicenter was likely in late August or early September

 

O: 15SEP2021 20:33:32  29.2N  105.4E Mw=5.4  EMSC   SICHUAN-CHONGQING BDR REG, CHI

P: 25AUG2021 136508    27.0N   97.0E 4.0-5.6 ACCAA  Myanmar                    

P: 15SEP2021 137044    28.0N  104.0E 4.0-5.4 DBAAA  Myanmar                    

 

An M 5.4 also occurred today in the South Georgia Island area west of the  South  Sandwich Islands where events of M 5.0 and 5.2 continued the month-long aftershocks sequence following the M 8.1 in that region on August 12, 2021. None of this activity was reported felt in these remote areas. The M 5.4 in the South Georgia Island area within about 300 km of today's epicenter was the strongest in that area since an M 5.6 on November 15, 2002. Larger earthquakes about 500 km southeast of this epicenter occurred in May, 2017 and in September, 2003 and in July through September, 2006. An M 5.0 occurred in this area about 400 km northeast of today's event  on May 15, 2021 and an M 4.9 occurred about 150 km northeast of this on August 12, 2021. Forecast 137235 had expected enhanced seismicity south of this was likely around September 16.

 

O: 16SEP2021 01:20:39  56.4S   36.2W mb=5.4  EMSC   SOUTH GEORGIA ISLAND REGION  

P: 16SEP2021 137235    61.0S   34.0W 4.0-5.6 ACAAA  Southern  Ocean            

 

O: 16SEP2021 04:58:37  59.6S   26.0W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 15SEP2021 10:22:57  58.0S   23.4W mb=5.2  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

P: 14SEP2021 137235    61.0S   22.0W 4.0-5.6 ACAAA  Southern  Ocean            

 

The strongest earthquake in the U.S. or Canada today was an M 5.0 in the central Andreanof Islands. This epicenter saw the last such event of M>=5 within about 150 km on September 9, 2017 when an M 5.4 occurred about 75 km west of today's epicenter. Most moderate earthquakes in the area occur at least 100 km north of today's epicenter. Forecast 137156 had expected today's event was likely in this area around September 15.

 

O: 15SEP2021 13:27:53  50.4N  176.3W mb=5.0  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 15SEP2021 137156    51.3N  176.8W 3.5-5.1 AAAAA  Andreanoff Isls, Aleutians 

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

For most events there are two listings. The first line is the observed event starting with "O:" for Observed. There follows the date, month and year, the time in UT hours:minutes:seconds, the latitude and longitude, the given magnitude and the reporting agency followed by the geographic location. The second line starts with "P:" This is the forecast event as forecast in our summaries normally more than a month in advance. Magnitudes may vary in response to updated seismic watches and daily variations due to tidal and other influences. This line has the forecast date, month and year, the forecast number, latitude, longitude and forecast magnitude range.  This is followed by a comparison between the forecast and the event. The comparison includes letters A-D. The first is number of days difference from predicted (A:up to 2, B3-5; C:6-10; D:more than 10), Difference in latitude (A:up to 1 degree; B:1-2 degrees; C:2-4 degrees; D:more than 4 degrees); longitude (same comparison as with latitude); magnitude (A: within forecast range; B: higher than forecast range; C: lower than forecast range; D: no comparison possible). The last letter is a stand in for a future comparison which needs to be done statistically after a large number of forecasts have been made. In previous data, an excellent match is generally AAAAA; a good match as one or two B's; a fair match has several B's and C's and a poor match is one which contains a number of C's or D's. 

 

ASIA

 

O: 15SEP2021 10:50:53  23.2N  121.4E ML=4.5  EMSC   TAIWAN                       

O: 15SEP2021 10:50:53  23.2N  121.3E ML=4.5  TAI    Hualien, Taiwan              

P: 12SEP2021 137049    23.0N  123.0E 4.0-5.9 BAAAA  Taiwan                     

P: 15SEP2021 137049    24.0N  123.0E 4.0-5.5 AABAA  Taiwan                     

P: 17SEP2021 137050    22.0N  122.0E 4.0-5.5 ABAAA  Taiwan                     

 

CWB reported this earthquake was felt with intensity III in Taitung; II in Hualien, and I in Nantou, Kaohsiung, Yunlin, Chiayi and Tainan Counties, Taiwan.

 

O: 15SEP2021 13:29:42  23.4N   93.2E mb=4.4  EMSC   MYANMAR-INDIA BORDER REGION  

O: 16SEP2021 04:49:46  23.9N   94.2E ML=4.3  EMSC   MYANMAR                      

P: 13SEP2021 137043    23.0N   95.0E 4.0-5.5 BAAAA  Myanmar                     

 

O: 15SEP2021 20:33:32  29.2N  105.4E Mw=5.4  EMSC   SICHUAN-CHONGQING BDR REG, CHI

P: 15SEP2021 137044    27.0N   97.0E 4.0-5.6 ACCAA  Myanmar                    

 

O: 16SEP2021 06:31:11  42.3N   76.5E mb=4.0  EMSC   KYRGYZSTAN                   

P: 15SEP2021 137123    41.0N   77.0E 4.0-5.6 ABAAA  Kirgizstan/Xinjiang        

 

O: 15SEP2021 17:00:35  53.8N  161.2E mb=4.2  EMSC   OFF EAST COAST OF KAMCHATKA  

P: 14SEP2021 137159    53.0N  160.0E 4.0-5.6 AAAAA  E. of Kamchatka            

 

 

INDONESIA AND PHILIPPINES

 

O: 15SEP2021 16:30:49   0.4N  124.0E ML=4.0  EMSC   MINAHASA, SULAWESI, INDONESIA

P: 20SEP2021 136967     1.0N  123.0E 4.0-5.6 BAAAA  Celebes Sea                

 

O: 16SEP2021 00:08:34   6.3S  130.4E ML=4.0  EMSC   BANDA SEA                     

P: 17SEP2021 136979     6.0S  129.0E 4.0-5.6 AABAA  Banda Sea                  

P: 19SEP2021 136999     7.0S  130.0E 4.0-5.4 BAAAA  West Irian, PNG            

 

O: 15SEP2021 19:00:43   8.3S  117.2E ML=4.4  EMSC   SUMBAWA REGION, INDONESIA    

P: 18SEP2021 137198    11.0S  118.0E 4.0-5.4 BCAAA  So. of Indonesia           

 

O: 15SEP2021 22:18:33   8.4N   98.0E ML=3.5  EMSC   MALAY PENINSULA, THAILAND    

P: 13SEP2021 136977     8.0N   93.0E 4.0-5.4 AACAA  Nicobar Islands            

 

O: 16SEP2021 05:39:33   9.2S  123.2E mb=4.4  EMSC   TIMOR REGION, INDONESIA      

P: 20SEP2021 137192    10.0S  124.0E 4.0-5.4 BAAAA  Flores Island area         

 

NEIC reported this earthquake of M 4.4 in Timor, Indonesia was felt with intensity II-III in the area(s) of Timor, Indonesia at Kupang Nusa, Tenggara.

 

O: 15SEP2021 10:48:06  11.3N  125.3E mb=4.3  EMSC   SAMAR, PHILIPPINES           

P: 13SEP2021 137013    12.0N  124.0E 3.5-4.9 AAAAA  Luzon, Philippines         

 

NEIC reported this earthquake of M 4.3 in Samar, Philippines was felt with intensity II-III in the area(s) of Samar, Philippines at San Antonio, Tabontabon and Mariveles, Luzon,

 

 

CENTRAL AND SOUTH AMERICA

 

O: 15SEP2021 11:58:23  13.8N   93.4W ML=4.2  EMSC   OFF COAST OF CHIAPAS, MEXICO 

P: 15SEP2021 137004    14.0N   94.0W 3.5-5.2 AAAAA  Chiapas, Mexico            

 

O: 15SEP2021 22:31:42  15.6N   92.9W mb=4.9  EMSC   CHIAPAS, MEXICO              

P: 12SEP2021 137009    16.0N   92.0W 3.5-5.3 BAAAA  Guatemala                  

 

NEIC reported this earthquake of M 4.9 in Chiapas, Mexico was felt with intensity II-III in the area(s) of Chiapas, Mexico at Tuxtla Gutierrez.

 

O: 15SEP2021 14:10:46  17.0N   99.8W ML=4.0  EMSC   GUERRERO, MEXICO             

P: 14SEP2021 137026    17.0N  100.0W 3.5-5.4 AAAAA  Oaxaca, Mexico             

 

O: 15SEP2021 07:24:18  18.3N   65.0W Md=3.4  EMSC   VIRGIN ISLANDS REGION        

P: 16SEP2021 137012    19.0N   64.0W 3.0-5.3 AAAAA  Leeward Islands            

 

NEIC reported this earthquake of M 3.4 in the Virgin Islands was felt with intensity II-III in the area(s) of the Virgin Islands at Saint Thomas and Saint John.

 

O: 15SEP2021 08:04:57  18.6N   74.2W ML=3.4  EMSC   HAITI REGION

O: 15SEP2021 07:40:12  18.3N   73.7W ML=3.4  EMSC   HAITI REGION                  

P: 16SEP2021 137029    19.0N   74.0W 3.4-5.2 AAAAA  Haiti                      

 

O: 15SEP2021 14:02:57  18.5N   69.0W Md=4.0  EMSC   DOMINICAN REPUBLIC           

P: 16SEP2021 137028    19.0N   68.0W 3.4-5.1 AAAAA  Puerto Rico                

 

NEIC reported this earthquake of M 4.0 in the Dominican Republic was felt with intensity II-III in the area(s) of the Dominican Republic at Guaymate.

 

O: 16SEP2021 02:13:06  20.1S   68.9W mb=4.4  EMSC   TARAPACA, CHILE              

P: 14SEP2021 137206    21.0S   69.0W 4.0-5.8 AAAAA  Coast No. Chile            

 

O: 15SEP2021 15:47:36  22.3S   68.6W mb=4.3  EMSC   ANTOFAGASTA, CHILE           

P: 15SEP2021 137206    24.0S   69.0W 4.0-5.6 ABAAA  Coast No. Chile            

 

O: 15SEP2021 08:32:40  23.6N  108.5W ML=4.2  EMSC   GULF OF CALIFORNIA           

P: 20SEP2021 137037    20.0N  109.0W 3.5-4.9 BACAA  Gulf of California         

 

O: 16SEP2021 00:18:43  24.0S   66.8W mb=4.5  EMSC   JUJUY, ARGENTINA             

P: 14SEP2021 137204    23.0S   66.0W 4.0-5.5 AAAAA  Argentina                  

 

O: 15SEP2021 18:48:34  24.1S   67.3W ML=4.1  EMSC   SALTA, ARGENTINA             

P: 15SEP2021 137206    24.0S   69.0W 4.0-5.6 AABAA  Coast No. Chile            

 

O: 16SEP2021 01:10:18  26.3S   71.0W mb=4.5  EMSC   OFFSHORE ATACAMA, CHILE      

P: 15SEP2021 137206    24.0S   69.0W 4.0-5.6 ACBAA  Coast No. Chile            

 

O: 16SEP2021 06:10:33  32.1S   72.4W mb=4.5  EMSC   OFFSHORE COQUIMBO, CHILE

O: 15SEP2021 08:46:58  32.1S   72.3W mb=5.0  EMSC   OFFSHORE COQUIMBO, CHILE     

P: 16SEP2021 137219    32.0S   72.0W 4.0-5.8 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 IV at La Ligua, Vina del Mar, Calera, Quilpue and II in Valparaiso and Santiago.

NEIC reported this earthquake of M 4.5 in Central Chile was felt with intensity II-III in the area(s) of Central Chile at Santiago.

 

 

AFRICA AND EUROPE

 

O: 15SEP2021 12:36:56  65.3N   16.1W ML=3.6  EMSC   ICELAND                      

P:  6SEP2021 136915    66.0N   17.0W 3.0-4.6 CAAAA  Iceland area               

 

O: 15SEP2021 12:29:07  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 15SEP2021 09:25:20  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 15SEP2021 137036    28.0N   17.0W 3.0-4.5 AAAAA  Canary Islands             

 

O: 15SEP2021 12:26:53  42.3N   19.5E ML=4.2  EMSC   ALBANIA                      

P:  8SEP2021 136852    43.0N   18.0E 3.0-5.3 CAAAA  Adriatic Sea               

 

NEIC reported this earthquake of M 4.2 in Albania was felt with intensity II-III in the area(s) of Albania with V in Kopik, VI in Shkoder, Podgorica, and Kosovo, Serbia and Montenegro,  and in Albania at Durres, Tirana.

 

SOUTHWEST PACIFIC

 

O: 15SEP2021 09:53:42  24.1S  179.4E mb=4.1  EMSC   SOUTH OF FIJI ISLANDS        

P: 17SEP2021 137216    25.0S  179.0E 4.0-5.4 AAAAA  Tonga/Fiji                 

 

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

 

OCEAN RIDGES

 

O: 15SEP2021 09:36:45   1.4S   15.9W mb=5.2  EMSC   NORTH OF ASCENSION ISLAND    

P: 20SEP2021 136981     1.0S   20.0W 4.0-5.8 BACAA  Central Mid-Atlantic       

 

O: 16SEP2021 01:20:39  56.4S   36.2W mb=5.4  EMSC   SOUTH GEORGIA ISLAND REGION  

P: 16SEP2021 137235    61.0S   34.0W 4.0-5.6 ACAAA  Southern  Ocean            

 

O: 16SEP2021 04:58:37  59.6S   26.0W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 15SEP2021 10:22:57  58.0S   23.4W mb=5.2  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

P: 14SEP2021 137235    61.0S   22.0W 4.0-5.6 ACAAA  Southern  Ocean            

 

O: 15SEP2021 08:08:31  59.7S   26.3W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 16SEP2021 137234    58.0S   26.0W 4.0-5.8 ABAAA  So. Sandwich Islands       

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 15SEP2021 12:44:12  28.2S  177.6W mb=5.1  EMSC   KERMADEC ISLANDS REGION

O: 15SEP2021 20:14:52  28.4S  177.4W mb=4.8  EMSC   KERMADEC ISLANDS REGION

O: 16SEP2021 00:06:09  28.1S  177.5W mb=4.9  EMSC   KERMADEC ISLANDS REGION      

P: 18SEP2021 137208    29.0S  178.0W 4.0-5.6 AAAAA  No. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O: 16SEP2021 06:56:48  44.4N  149.2E mb=4.0  EMSC   KURIL ISLANDS                

P: 17SEP2021 137120    44.0N  148.0E 3.5-5.6 AAAAA  Hokkaido, Japan            

P: 19SEP2021 137120    44.0N  150.0E 3.5-5.4 BAAAA  Hokkaido, Japan            

 

O: 16SEP2021 06:28:04  52.7N  152.7E mb=4.5  EMSC   NORTHWEST OF KURIL ISLANDS   

P: 19SEP2021 137147    47.0N  151.0E 3.5-5.6 BCBAA  So. Kurils                 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 15SEP2021 08:37:33  31.1N  114.4W ML=3.6  EMSC   GULF OF CALIFORNIA           

P: 14SEP2021 137038    30.0N  114.0W 3.5-4.9 ABAAA  Gulf of California         

 

O: 16SEP2021 05:46:34  31.3N  115.2W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO

O: 15SEP2021 08:24:04  31.3N  115.3W ML=3.2  EMSC   BAJA CALIFORNIA, MEXICO      

P: 12SEP2021 137092    31.9N  116.3W 2.5-4.8 BAAAA  So. California             

 

O: 15SEP2021 10:01:32  34.4N  118.0W Ml=2.3  EMSC   SOUTHERN CALIFORNIA          

P: 17SEP2021 137095    34.0N  118.7W 2.5-4.6 AAAAA  So. California             

 

O: 15SEP2021 18:50:02  34.7N  116.4W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P: 16SEP2021 137098    34.6N  116.7W 2.5-4.8 AAAAA  So. California             

 

O: 16SEP2021 02:45:42  36.0N  120.6W Md=2.8  EMSC   CENTRAL CALIFORNIA

O: 15SEP2021 12:51:06  35.9N  120.4W Md=2.3  EMSC   CENTRAL CALIFORNIA           

P: 14SEP2021 137064    36.1N  120.1W 2.5-4.8 AAAAA  Central California         

P: 14SEP2021 137065    36.4N  121.0W 2.5-4.6 AAAAA  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 Los Banos and Aromas.

 

O: 15SEP2021 12:56:17  36.1N  117.9W Ml=2.2  EMSC   CENTRAL CALIFORNIA           

P: 16SEP2021 137056    36.3N  118.1W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 16SEP2021 03:23:42  37.4N  118.6W Md=2.9  EMSC   CENTRAL CALIFORNIA           

P: 17SEP2021 137058    37.3N  118.3W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 15SEP2021 22:50:27  37.4N  121.0W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P: 19SEP2021 137066    37.1N  121.5W 2.5-4.6 BAAAA  Central California         

 

O: 16SEP2021 02:08:47  37.5N  121.9W Md=2.3  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 15SEP2021 137066    37.9N  122.0W 2.5-4.6 AAAAA  Central California         

 

O: 16SEP2021 06:51:56  38.4N  119.6W Md=2.1  EMSC   CENTRAL CALIFORNIA

O: 15SEP2021 16:08:56  38.5N  119.5W Md=2.2  EMSC   CENTRAL CALIFORNIA

O: 15SEP2021 16:17:12  38.5N  119.5W Md=2.2  EMSC   CENTRAL CALIFORNIA

O: 15SEP2021 12:29:44  38.4N  119.6W ML=3.3  EMSC   CENTRAL CALIFORNIA            

O: 15SEP2021 12:29:44  38.4N  119.6W ML=3.6  ANSS   CENTRAL CALIFORNIA           

P: 17SEP2021 137062    38.3N  119.3W 2.5-4.6 AAAAA  California/Nevada area     

 

NEIC reported this earthquake of M 3.6 in Nevada was felt with intensity II-III in the area(s) of Nevada at Gardnerville, Glenbrook, and in California at Coleville, South Lake Tahoe, Sonora, Volcano, Camino, Racho Cordova, Nevada City and Gustine.

 

ALASKA

 

O: 15SEP2021 13:27:53  50.4N  176.3W mb=5.0  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 15SEP2021 137156    51.3N  176.8W 3.5-5.1 AAAAA  Andreanoff Isls, Aleutians 

 

O: 15SEP2021 10:48:54  55.1N  156.3W mb=4.5  EMSC   SOUTH OF ALASKA              

P: 19SEP2021 137153    54.7N  156.9W 3.5-5.2 BAAAA  Alaska Peninsula           

 

O: 15SEP2021 11:21:13  58.5N  137.2W MB=3.0  ECAN Skagway, AK                    

P: 11SEP2021 137170    59.0N  139.0W 3.0-4.5 BAAAA  Southeast Alaska           

 

O: 15SEP2021 02:10:53  60.0N  140.1W MB=3.0  ECAN Yakutat, AK                    

O: 15SEP2021 01:43:06  60.0N  140.1W MB=3.7  ECAN Yakutat, AK                    

P: 15SEP2021 137170    60.0N  140.0W 3.0-4.5 AAAAA  Southeast Alaska           

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 16SEP2021 13:41:23  48.7N  129.3W MB=3.0  ECAN Port Alice, BC                 

P: 17SEP2021 137150    48.3N  128.5W 2.8-5.4 AAAAA  Vancouver Island area      

 

ROCKY MOUNTAINS REGION

 

O: 15SEP2021 18:44:49  31.6N  104.2W ML=2.2  EMSC   WESTERN TEXAS                

P: 14SEP2021 137091    31.6N  103.6W 2.0-4.0 AAAAA  SW U.S.A                   

 

O: 15SEP2021 22:55:53  43.2N  110.8W Ml=2.0  EMSC   WYOMING                      

P: 17SEP2021 137152    43.0N  111.5W 2.0-4.1 AAAAA  Yellowstone/Wyoming        

 

O: 15SEP2021 09:16:54  44.4N  114.8W Ml=2.3  EMSC   SOUTHERN IDAHO               

P: 13SEP2021 137126    44.4N  115.1W 2.0-4.0 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O: 15SEP2021 21:52:00  35.1N   95.4W ML=2.1  EMSC   OKLAHOMA                     

P: 16SEP2021 137106    35.0N   97.0W 2.0-4.4 AAAAA  Southern Plains            

 

O: 15SEP2021 18:59:14  36.3N   97.5W ML=2.3  EMSC   OKLAHOMA                     

P: 15SEP2021 137105    36.0N   97.0W 2.0-4.1 AAAAA  Southern Plains            

 

HAWAII

 

O: 16SEP2021 00:43:36  19.2N  155.5W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15SEP2021 17:36:53  19.2N  155.5W Ml=3.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 17SEP2021 137010    19.4N  155.3W 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 at Pahala, Captain Cook, Volcano, Pepeekeo, Waikoloa.

 

MODERATE SYMMETRIC QUAKES IN ATLANTIC

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 14, 2021

 

The largest earthquakes in the world today were an M 5.3 and 5.2 in the South Sandwich Islands, continuing the month-long aftershock sequence in that region. These events at 59 South latitude were joined today by an M 4.6 at 59 North Latitude in the Reykjanes Ridge directly to the north of the South Sandwich Islands. These events occurred near local solar midnight and may have been promoted by high tidal stresses which maximize near this hour. The event  in the Reykjanes Ridge had been expected within about 100 km to occur in mid-September in forecasts 136901 and 137165. The activity in the South Sandwich Islands had been forecast in # 137234 and 137235 within about 50 km of these events.

 

O: 15SEP2021 03:31:35  58.4S   25.6W Mw=5.3  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

 

O: 15SEP2021 04:43:04  58.9S   23.8W mb=5.2  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

P: 14SEP2021 137235    61.0S   22.0W 4.0-5.6 ABAAA  Southern  Ocean            

 

O: 15SEP2021 03:47:05  58.7N   31.9W mb=4.6  EMSC   REYKJANES RIDGE              

P:  7SEP2021 136901    58.0N   32.0W 4.0-5.8 CAAAA  North Mid-Atlantic Ridge   

P: 13SEP2021 137165    59.0N   30.0W 4.0-5.4 AAAAA  North Mid-Atlantic Ridge   

 

Moderate earthquakes of M 5.2 and 5.3 also occurred today in Indonesia in Minahasa, Sulawesi and in northern Sumatra and in Tonga. These are not unusual events and had been expected within about 100 km in forecasts 136975, 136976 and 137194.

 

O: 15SEP2021 00:49:49   1.2N  122.2E Mw=5.2  EMSC   MINAHASA, SULAWESI, INDONESIA

P: 14SEP2021 136975     1.0N  123.0E 4.0-5.4 AAAAA  Mindanao, Philippines      

 

O: 14SEP2021 20:13:54   3.0N   95.4E Mw=5.3  EMSC   OFF W COAST OF NORTHERN SUMATR

P: 15SEP2021 136976     2.0N   95.0E 4.0-5.4 AAAAA  Nicobar Islands            

 

NEIC reported the earthquake of M 5.2 in Tonga was felt with intensity II-III in the area(s) of Tonga at Pangai Ha'apai. Forecast 137194 had expected this event within about 100 km of this epicenter was likely around September 18.

 

O: 14SEP2021 10:28:18  15.1S  174.0W Mw=5.2  EMSC   TONGA                         

P: 18SEP2021 137194    15.0S  173.0W 4.0-5.6 BAAAA  Samoa Islands              

 

A series of light earthquakes including events of M 3.4 and 3.4 occurred  in Baja California, Mexico today. These occurred near local solar midnight and local solar noon and may have been promoted by high tidal stresses which maximize near these hours. Forecast 137092 had expected this activity was likely around September 12 to the northwest of these epicenters.

 

O: 14SEP2021 18:53:31  31.4N  115.5W ML=3.4  EMSC   BAJA CALIFORNIA, MEXICO

O: 14SEP2021 18:58:58  31.4N  115.4W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO

O: 14SEP2021 19:01:19  31.4N  115.5W ML=3.2  EMSC   BAJA CALIFORNIA, MEXICO

O: 14SEP2021 17:46:23  31.5N  115.6W Ml=2.6  EMSC   BAJA CALIFORNIA, MEXICO

O: 15SEP2021 06:57:03  31.3N  115.4W ML=3.4  EMSC   BAJA CALIFORNIA, MEXICO      

P: 12SEP2021 137092    31.9N  116.3W 2.5-4.8 BAAAA  So. California             

 

The strongest earthquake in the U.S. or Canada today was an M 3.8 in the Parkfield, California area. NEIC reported this earthquake of M 3.8 in Central California was felt with intensity II-III in the area(s) of Central California at Coalinga, King City, Bradley, Paso Robles, Los Banos, Fresno, Salinas and San Juan Bautista.  This is the strongest earthquake within about 50 km of this epicenter since an M 3.9 more than a year ago on July 30, 2020. The only other event in the past six years in the area was an M 4.0 on March 3, 2020. Forecasts 137064 and 137065 had today's event within this area around September 14. This epicenter is at 103 degrees from the M 7.1 in Mindanao, Philippines of August 11 and may have been promoted by energy from that source.

 

O: 14SEP2021 07:38:50  36.4N  120.5W ML=3.8  EMSC   CENTRAL CALIFORNIA           

P: 14SEP2021 137064    36.1N  120.1W 2.5-4.8 AAAAA  Central California         

P: 14SEP2021 137065    36.4N  121.0W 2.5-4.6 AAAAA  Central California         

 

The swarm of earthquakes in the Canary Islands of Spain continued today. Only four events of M>=2.9 occurred in the area today but lesser events were common as well. This appears to be a significant decline in regional activity following the M 3.9 yesterday. This could be precursory to a change - to quiet or to active - conditions in the next several days. Forecast 137036 had expected this event was likely around September 15. This activity is at the fourth node (90 degrees) from the M 8.1 in the Alaska Peninsula of March, 2021 and the seventh node (51.4 degrees) from the M 7.2 in Haiti of August 14, 2021 and may have been promoted by energy from those sources.

 

O: 14SEP2021 22:00:56  28.6N   17.9W ML=2.9  EMSC   CANARY ISLANDS, SPAIN REGION

O: 15SEP2021 05:15:23  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 15SEP2021 06:07:41  28.6N   17.9W ML=2.9  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 21:11:08  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 15SEP2021 137036    28.0N   17.0W 3.0-4.5 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: 15SEP2021 00:41:13  36.3N   70.6E mb=4.3  EMSC   HINDU KUSH REGION, AFGHANISTAN

P: 14SEP2021 137073    36.0N   69.0E 3.8-5.5 AAAAA  Hindu Kush/Pakistan        

 

O: 14SEP2021 17:52:24  41.3N   81.0E mb=4.2  EMSC   SOUTHERN XINJIANG, CHINA     

P: 16SEP2021 137123    43.0N   82.0E 4.0-5.6 ABAAA  Kirgizstan/Xinjiang        

 

O: 14SEP2021 10:40:05  33.3N   72.2E mb=4.7  EMSC   PAKISTAN                     

P: 18SEP2021 137086    36.0N   75.0E 3.8-5.2 BCBAA  Northern India             

 

NEIC reported this earthquake of M 4.7 in Pakistan was felt with intensity II-III in the area(s) of Pakistan at Pindi Gheb (VI), Pawalpindi, Pumjab and in Islamabad.

 

O: 14SEP2021 19:57:31  53.9N  161.2E mb=4.9  EMSC   OFF EAST COAST OF KAMCHATKA  

P: 14SEP2021 137159    53.0N  160.0E 4.0-5.6 AAAAA  E. of Kamchatka            

 

O: 15SEP2021 04:51:05  54.3N  162.9E mb=4.3  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 14SEP2021 137161    56.0N  165.0E 4.0-6.0 ABBAA  Komandorsky Isl            

 

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

 

INDONESIA AND PHILIPPINES

 

O: 14SEP2021 11:26:39   0.6S  139.0E ML=4.0  EMSC   PAPUA REGION, INDONESIA      

P: 18SEP2021 136998     2.0S  139.0E 4.0-5.4 BBAAA  West Irian, PNG            

 

O: 14SEP2021 21:03:35   1.1N  128.1E ML=4.0  EMSC   HALMAHERA, INDONESIA         

P: 12SEP2021 136974     2.0N  128.0E 4.0-5.4 AAAAA  Halmahera                  

 

O: 15SEP2021 00:49:49   1.2N  122.2E Mw=5.2  EMSC   MINAHASA, SULAWESI, INDONESIA

P: 14SEP2021 136975     1.0N  123.0E 4.0-5.4 AAAAA  Mindanao, Philippines      

 

O: 14SEP2021 20:13:54   3.0N   95.4E Mw=5.3  EMSC   OFF W COAST OF NORTHERN SUMATR

P: 15SEP2021 136976     2.0N   95.0E 4.0-5.4 AAAAA  Nicobar Islands            

 

O: 15SEP2021 04:42:03   3.5N  126.9E ML=4.5  EMSC   KEPULAUAN TALAUD, INDONESIA  

P: 20SEP2021 136974     3.0N  127.0E 4.0-5.4 BAAAA  Halmahera                  

 

O: 14SEP2021 15:35:02   6.6S  130.7E ML=4.2  EMSC   BANDA SEA                    

P: 17SEP2021 136979     6.0S  129.0E 4.0-5.6 BABAA  Banda Sea                  

 

O: 14SEP2021 09:14:34   7.1S  105.5E ML=4.1  EMSC   JAVA, INDONESIA              

P: 19SEP2021 136993     7.0S  106.0E 4.0-5.4 BAAAA  So. of Java                

 

O: 14SEP2021 09:08:43   8.1S  107.9E ML=4.4  EMSC   JAVA, INDONESIA              

P: 13SEP2021 136993     9.0S  107.0E 4.0-5.6 AAAAA  So. of Java                

 

O: 14SEP2021 18:47:12  10.4N   93.2E mb=4.4  EMSC   ANDAMAN ISLANDS, INDIA REGION

P: 13SEP2021 137000    11.0N   95.0E 4.0-5.5 AABAA  Andaman Islands            

 

 

CENTRAL AND SOUTH AMERICA

 

O: 15SEP2021 00:47:07  11.1N   86.1W ML=4.1  EMSC   NEAR COAST OF NICARAGUA      

P: 11SEP2021 137021    11.0N   86.0W 3.5-5.5 BAAAA  Nicaragua                  

 

O: 14SEP2021 16:38:58  15.3N   94.4W ML=4.2  EMSC   OFFSHORE CHIAPAS, MEXICO     

P: 15SEP2021 137004    14.0N   94.0W 3.5-5.2 ABAAA  Chiapas, Mexico            

 

O: 15SEP2021 01:36:53  18.0N   67.0W Md=3.5  EMSC   PUERTO RICO                  

P: 17SEP2021 137027    19.0N   67.0W 3.4-5.3 AAAAA  Puerto Rico                

 

NEIC reported this earthquake of M 3.5 in Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico at Guanica, Sabana Grande, Yauco and Cabo Rojo.

 

O: 15SEP2021 05:07:26  18.9N   74.0W ML=3.4  EMSC   HAITI REGION

O: 15SEP2021 06:59:10  18.9N   74.0W ML=3.3  EMSC   HAITI REGION

O: 15SEP2021 04:26:52  18.8N   74.1W ML=3.5  EMSC   HAITI REGION                 

P: 16SEP2021 137029    19.0N   74.0W 3.4-5.2 AAAAA  Haiti                      

 

O: 14SEP2021 19:45:25  19.0N   69.4W ML=3.1  EMSC   DOMINICAN REPUBLIC           

P: 19SEP2021 137034    20.0N   69.0W 3.0-4.4 BAAAA  Bahamas/No. Caribbean      

 

O: 14SEP2021 09:49:04  19.1N   66.1W Md=3.2  EMSC   PUERTO RICO REGION           

P: 12SEP2021 137027    18.0N   66.0W 3.4-5.4 ABAAA  Puerto Rico                

 

O: 15SEP2021 04:07:54  31.8S   72.0W mb=4.1  EMSC   OFFSHORE COQUIMBO, CHILE

O: 15SEP2021 02:09:42  31.8S   72.0W Mw=4.1  EMSC   OFFSHORE COQUIMBO, CHILE     

P: 16SEP2021 137219    32.0S   72.0W 4.0-5.8 AAAAA  Central Chile              

 

 

AFRICA AND EUROPE

 

O: 15SEP2021 06:52:33  35.5N    3.6W ML=3.4  EMSC   STRAIT OF GIBRALTAR          

P: 14SEP2021 137078    35.0N    4.0W 3.5-5.2 AAAAA  Morocco/Spain              

 

O: 14SEP2021 10:40:40  37.7N   20.3E mb=4.5  EMSC   IONIAN SEA                   

P: 16SEP2021 137082    37.0N   21.0E 3.0-4.7 AAAAA  No. Greece                 

 

O: 15SEP2021 02:19:43  42.3N   19.5E mb=4.1  EMSC   ALBANIA                      

P:  8SEP2021 136852    43.0N   18.0E 3.0-5.3 CAAAA  Adriatic Sea               

P: 17SEP2021 137142    40.0N   20.0E 3.0-5.1 ACAAA  Romania/NW Turkey          

 

NEIC reported this earthquake of M 4.1 in Albania was felt with intensity II-III in the area(s) of Albania at Shkoder, Podgorica, Serbia and Montenegro, and Cilipi Dubrovnik, Croatia.

 

O: 14SEP2021 22:00:56  28.6N   17.9W ML=2.9  EMSC   CANARY ISLANDS, SPAIN REGION

O: 15SEP2021 05:15:23  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 15SEP2021 06:07:41  28.6N   17.9W ML=2.9  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 21:11:08  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 15SEP2021 137036    28.0N   17.0W 3.0-4.5 AAAAA  Canary Islands             

 

SOUTHWEST PACIFIC

 

O: 14SEP2021 23:44:23  10.5S  165.9E Mw=5.1  EMSC   SANTA CRUZ ISLANDS           

P: 16SEP2021 137193    10.0S  162.0E 4.0-5.4 AACAA  No. of Santa Cruz Islands  

 

O: 14SEP2021 10:28:18  15.1S  174.0W Mw=5.2  EMSC   TONGA                        

P: 18SEP2021 137194    15.0S  173.0W 4.0-5.6 BAAAA  Samoa Islands              

 

O: 14SEP2021 07:53:29  22.3S  179.3W mb=4.2  EMSC   SOUTH OF FIJI ISLANDS        

P: 13SEP2021 137215    23.0S  177.0W 4.0-5.6 AABAA  Tonga Islands              

 

OCEAN RIDGES

 

O: 15SEP2021 03:31:35  58.4S   25.6W Mw=5.3  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

 

O: 15SEP2021 04:43:04  58.9S   23.8W mb=5.2  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

P: 14SEP2021 137235    61.0S   22.0W 4.0-5.6 ABAAA  Southern  Ocean            

 

O: 15SEP2021 03:47:05  58.7N   31.9W mb=4.6  EMSC   REYKJANES RIDGE              

P:  7SEP2021 136901    58.0N   32.0W 4.0-5.8 CAAAA  North Mid-Atlantic Ridge   

P: 13SEP2021 137165    59.0N   30.0W 4.0-5.4 AAAAA  North Mid-Atlantic Ridge   

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 15SEP2021 06:34:32  34.8S  178.0E ML=4.1  EMSC   NORTH OF NEW ZEALAND

O: 15SEP2021 00:24:04  34.5S  178.8E ML=4.1  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 18SEP2021 137222    35.0S  179.0E 3.0-4.4 BAAAA  North Island, N.Z.         

 

O: 14SEP2021 09:50:19  40.0S  173.8E ML=4.2  EMSC   COOK STRAIT, NEW ZEALAND     

O: 14SEP2021 07:32:19  40.6S  173.3E ML=4.0  EMSC   COOK STRAIT, NEW ZEALAND     

P: 13SEP2021 137229    41.0S  174.0E 3.0-5.1 AAAAA  So. Island, N.Z.           

 

JAPAN AND KURIL ISLANDS

 

O: 15SEP2021 02:09:30  35.1N  140.6E ML=4.0  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 14SEP2021 137088    36.0N  142.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 14SEP2021 18:53:31  31.4N  115.5W ML=3.4  EMSC   BAJA CALIFORNIA, MEXICO

O: 14SEP2021 18:58:58  31.4N  115.4W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO

O: 14SEP2021 19:01:19  31.4N  115.5W ML=3.2  EMSC   BAJA CALIFORNIA, MEXICO

O: 14SEP2021 17:46:23  31.5N  115.6W Ml=2.6  EMSC   BAJA CALIFORNIA, MEXICO

O: 15SEP2021 06:57:03  31.3N  115.4W ML=3.4  EMSC   BAJA CALIFORNIA, MEXICO      

P: 12SEP2021 137092    31.9N  116.3W 2.5-4.8 BAAAA  So. California             

 

O: 14SEP2021 20:09:21  30.7N  114.1W ML=3.7  EMSC   GULF OF CALIFORNIA           

O: 14SEP2021 20:58:43  31.3N  114.4W ML=3.2  EMSC   GULF OF CALIFORNIA           

P: 14SEP2021 137038    30.0N  114.0W 3.5-4.9 AAAAA  Gulf of California         

 

O: 14SEP2021 14:12:58  32.5N  115.4W Ml=2.1  EMSC   BAJA CALIFORNIA, MEXICO      

P: 16SEP2021 137092    32.4N  115.8W 2.5-4.8 AAAAA  So. California             

 

O: 14SEP2021 13:35:27  34.0N  116.8W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P: 16SEP2021 137098    34.6N  116.7W 2.5-4.8 AAAAA  So. California             

 

O: 14SEP2021 21:36:25  34.2N  117.5W ML=2.8  EMSC   SOUTHERN CALIFORNIA          

P: 13SEP2021 137097    34.1N  117.4W 2.5-4.4 AAAAA  So. California             

 

NEIC reported this earthquake of M 2.9 in eastern Los Angeles, California was felt with intensity II-III in the area(s) of eastern Los Angeles, California at Lytle Creek, Mt. Baldy, Rancho Cucamonga, Hesperia, San Bernardino, and Upland.

 

O: 15SEP2021 00:57:34  34.3N  118.4W ML=2.7  EMSC   GREATER LOS ANGELES AREA, CALI

O: 15SEP2021 00:57:34  34.3N  118.4W ML=3.0  ANSS   GREATER LOS ANGELES AREA, CALI

P: 17SEP2021 137095    34.0N  118.7W 2.5-4.6 AAAAA  So. California             

 

NEIC reported this earthquake of M 3.0 in eastern Los Angeles, California was felt with intensity II-III in the area(s) of western Los Angeles, California at San Fernando, Pacoima, Mission Hills, Newhall, Granada Hills, North Hills, Panorama, Sun Valley, Northridge.

 

O: 14SEP2021 23:20:49  35.0N  117.7W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P: 13SEP2021 137099    35.0N  117.7W 2.5-4.4 AAAAA  So. California             

 

O: 14SEP2021 07:38:50  36.4N  120.5W ML=3.8  EMSC   CENTRAL CALIFORNIA           

P: 14SEP2021 137064    36.1N  120.1W 2.5-4.8 AAAAA  Central California         

P: 14SEP2021 137065    36.4N  121.0W 2.5-4.6 AAAAA  Central California         

 

NEIC reported this earthquake of M 3.8 in Central California was felt with intensity II-III in the area(s) of Central California at Coalinga, King City, Bradley, Paso Robles, Los Banos, Fresno, Salinas and San Juan Bautista.

 

O: 14SEP2021 19:58:53  36.5N  118.0W Ml=2.2  EMSC   CENTRAL CALIFORNIA           

P: 16SEP2021 137056    36.3N  118.1W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 14SEP2021 18:45:27  37.5N  121.8W ML=2.7  EMSC   SAN FRANCISCO BAY AREA, CALIF.

O: 14SEP2021 18:45:27  37.5N  121.8W ML=2.9  ANSS   SAN FRANCISCO BAY AREA, CALIF.

P: 15SEP2021 137066    37.9N  122.0W 2.5-4.6 AAAAA  Central California         

 

NEIC reported this earthquake of M 2.9 in San Francisco Bay, California was felt with intensity II-III in the area(s) of San Francisco Bay, California in Milpitas, Fremnt, San Jose, Pleasanton.

 

O: 14SEP2021 20:05:04  37.9N  118.9W ml=2.2  EMSC   CENTRAL CALIFORNIA           

P: 10SEP2021 136800    38.2N  118.8W 2.5-4.4 BAAAA  California/Nevada area     

 

O: 15SEP2021 00:31:16  38.5N  119.5W ml=2.2  EMSC   CENTRAL CALIFORNIA

O: 14SEP2021 23:42:05  38.5N  119.4W Md=2.3  EMSC   CENTRAL CALIFORNIA           

P: 17SEP2021 137062    38.3N  119.3W 2.5-4.6 BAAAA  California/Nevada area     

 

O: 14SEP2021 21:44:51  40.5N  119.6W ml=2.1  EMSC   NEVADA                       

P: 15SEP2021 137115    40.5N  119.5W 2.5-4.8 AAAAA  California/Nevada area     

 

 

ALASKA

 

O: 14SEP2021 20:19:46  56.2N  149.6W ML=3.1  EMSC   GULF OF ALASKA               

P: 15SEP2021 137184    55.9N  149.8W 3.0-4.6 AAAAA  Northern Alaska            

 

O: 14SEP2021 21:54:38  60.4N  153.3W ML=3.0  EMSC   SOUTHERN ALASKA              

P: 16SEP2021 137175    60.0N  153.5W 3.2-5.3 AAAAA  Central Alaska             

 

O: 14SEP2021 21:51:19  62.2N  145.7W ML=3.7  EMSC   CENTRAL ALASKA               

P:  8SEP2021 136913    62.8N  143.8W 3.2-5.1 CAAAA  Central Alaska             

 

NEIC reported this earthquake of M 3.6 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Glennallen and Palmer.

 

O: 15SEP2021 02:33:21  64.4N  146.7W ML=3.0  EMSC   CENTRAL ALASKA               

P: 19SEP2021 137181    63.0N  148.6W 3.2-5.3 BBAAA  Central Alaska              

 

O: 14SEP2021 07:39:19  69.5N  143.7W ML=3.2  EMSC   NORTHERN ALASKA              

P: 14SEP2021 137183    69.9N  144.8W 3.0-4.6 AAAAA  Northern Alaska            

 

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

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 15SEP2021 01:43:06  60.1N  140.2W ML=3.4  EMSC   SOUTHERN YUKON TERRITORY, CANA

P: 15SEP2021 137170    60.0N  140.0W 3.0-4.5 AAAAA  Southeast Alaska            

 

ROCKY MOUNTAINS REGION

 

O: 15SEP2021 05:09:19  39.4N  110.3W ML=2.0  EMSC   UTAH

O: 14SEP2021 18:03:27  39.4N  110.3W ML=2.3  EMSC   UTAH                         

P: 13SEP2021 137110    39.7N  110.8W 2.0-4.3 AAAAA  Utah area                  

 

O: 14SEP2021 20:41:22  41.8N  112.7W Ml=2.0  EMSC   UTAH                         

P: 17SEP2021 137152    43.0N  111.5W 2.0-4.1 BBAAA  Yellowstone/Wyoming        

 

EASTERN U.S./CANADA

 

O: 15SEP2021 05:53:16  36.4N   89.5W Md=2.2  EMSC   TENNESSEE                     

P: 14SEP2021 137081    36.9N   89.2W 2.0-4.1 AAAAA  New Madrid area            

 

HAWAII

 

O: 14SEP2021 20:25:20  19.2N  155.5W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 14SEP2021 137010    18.8N  155.2W 3.0-4.4 AAAAA  Hawaii                      

 

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

 

SUPER TYPHOON CHANTHU PROMOTES SEISMICITY IN TAIWAN AND JAPAN

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 13, 2021

 

The strongest earthquake in the world today was an M 5.8 in the Izu Islands, Japan. NEIC reported it was felt with intensity II-III in Japan in Shizuoka, Kanagawa, Tokyo, Saitama, Ibaraki and Fukushima. Super-Typhoon Chanthu was near this epicenter when this earthquake occurred and probably helped trigger this event as it made landfall in southern Japan as noted in this summary:

 

"Typhoon Chanthu (TD 19W) continued today north of Taiwan with winds up to 40 kts. It is expected to track to the west and north over the next week and possibly to impact regional seismicity in Central and northern Philippines and southern Japan around September 13-16." (September 13-14, 2021)

 

Today's event is the strongest within about 250 km of this epicenter since an M 6.3 on July 27, 2019 and prior to that an M 6.0 on April 1, 2016. These may be aftershocks of earthquakes of M 7.2 and 7.4 on September 5, 2004 to the west of today's epicenter.  Forecast 137070 had expected enhanced seismicity within about 100 km of today's event around September 13.

 

The activity in Japan on September 5, 2004 was also associated with a strong typhoon as noted at the time in this summary:

 

"The earthquakes occurred at the same time as a strong typhoon which has caused considerable flooding and landslides in the area and a strong eruption of

Mount Asama, the major volcano in Japan." (September 5, 2004)

 

This epicenter in the Izu Islands, Japan is near 103 degrees from the event in Guerrero, Mexico of M 7.1 and was probably promoted by energy from that source.

 

O: 13SEP2021 22:46:06  32.5N  137.8E Mw=5.8  EMSC   IZU ISLANDS, JAPAN REGION    

P: 13SEP2021 137070    33.0N  137.0E 3.5-4.9 AAAAA  Central/So. Honshu Japan   

 

An earthquake of M 4.9-5.6 also occurred in Taiwan today. NEIC reported this event was felt with intensity IV in Taiwan in Taichung, and Taipei. CWB reported this earthquake was felt with intensity IV in Nantou, Taichung, Changhua, Hualien, Yilan; III in Miaoli, Yunlin, Hsinchu, Taitung; II in Taoyuan, Hsinchu, Taipei, Chiayi, Kaohsiung, Tainan and I in Penghu and Pingtung Counties, Taiwan.

The last event in Taiwan of M>=5.6 was an M 5.8 on August 4, 2021. Similar events  also occurred on April 18 and March 25, 2021. The strongest event in Taiwan in the past year was an M 6.2 on December 10, 2020. Today's event followed the passage of Super-Typhoon Chanthu over this epicenter two days ago as noted in the summary at the time:

 

"Typhoon Chanthu (TD 19W) continued today over the Taiwan with winds up to 135 kts. It is expected to track to the west and north over the next week and possibly to impact regional seismicity in Central and northern Philippines and Taiwan around September 9-12." (September 11-12, 2021)

 

Forecast 137047 had expected today's event in Taiwan was likely within about  100 km of this epicenter around September 15.

 

 

O: 13SEP2021 10:41:28  24.1N  121.0E mb=4.9  EMSC   TAIWAN                       

O: 13SEP2021 10:41:27  24.1N  121.0E ML=5.6  TAI    Hualien, Taiwan              

P: 15SEP2021 137047    25.0N  122.0E 4.0-5.8 AAAAA  Ryukyu Islands             

 

The strongest earthquake in the U.S. or Canada today occurred as an M 4.7-4.9 in Central Alaska. NEIC reported it was felt with intensity V in Salcha with IV in Eielson AFB, Alaska. Also felt with intensity III in Fairbanks, North Pole, Fort Wainwright, Delta Junction, Healy and Nenana. At M 4.9 this event is the strongest within about 100 km of this epicenter since an M 5.5 on January 7, 1990. A foreshock of M 4.7 hit the area on July 23, 2021. Forecasts 137180 and 137181 had expected enhanced activity in this area was likely in mid-September.

 

O: 14SEP2021 05:56:37  64.4N  146.8W Mw=4.7  EMSC   CENTRAL ALASKA                

O: 14SEP2021 05:56:37  64.4N  146.8W Mw=4.9  ANSS   CENTRAL ALASKA               

P: 11SEP2021 137180    62.7N  149.3W 3.2-5.3 BBBAA  Central Alaska             

P: 19SEP2021 137181    63.0N  148.6W 3.2-5.3 BBAAA  Central Alaska              

 

An M 3.6 was widely felt in western Los Angeles, California today. NEIC reported it was felt with intensity IV in Moorpark and III in Thousand Oaks, Westlake Village, Camarillo, Newbury Park, Oak Park, Sun Valley, Agoura Hills and many other communities in southern California. An M 4.0 last hit in western Los Angeles on April 5, 2021 and a year ago as an M 4.5 in central Los Angeles on September 19, 2020 - a year ago. Forecasts 136834 and 137095 had expected today's activity was likely within about 25 km between September 10 and 17.

 

O: 13SEP2021 14:59:33  34.2N  119.0W Mw=3.6  EMSC   GREATER LOS ANGELES AREA, CALI

P: 10SEP2021 136834    34.0N  118.7W 2.5-4.6 BAAAA  So. California             

P: 17SEP2021 137095    34.0N  118.7W 2.5-4.6 BAAAA  So. California             

 

A series of light earthquakes also continued in the northern Baja California region today. This is an active region following geomagnetic storms. Today's activity included at least six events of M>=3. This activity was centered near local solar noon and local solar midnight with one of the strongest events occurring as an M 3.7 at 19:52 UT, within minutes of local solar noon, and may have been promoted by strong tidal stresses which maximize near these hours. Forecast 137038 had expected this activity around September 14.

 

O: 13SEP2021 09:51:06  30.9N  114.2W ML=3.8  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 09:53:10  30.9N  114.2W ML=3.6  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 19:52:11  30.9N  114.2W ML=3.7  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 20:35:09  30.9N  114.2W ML=3.6  EMSC   GULF OF CALIFORNIA

O: 14SEP2021 05:40:53  31.0N  113.8W ML=3.7  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 20:14:51  30.8N  114.2W ML=3.6  EMSC   GULF OF CALIFORNIA           

P: 14SEP2021 137038    30.0N  114.0W 3.5-4.9 AAAAA  Gulf of California         

 

An event of M 3.8 also shook southeastern Colorado today. NEIC reported maximum intensity was felt with V at Pritchett with light shaking of II-III in Colorado at Springfield, Kim, Campo, Walsh, Lamar, La Junta, Rocky Ford and in Kenton, Oklahoma and Elkhart, Kansas. This is the strongest earthquake in Southeastern Colorado within about 100 km of this epicenter in the past 30 years. Forecast 137071 had expected today's activity to the west was likely around September 14.

 

O: 13SEP2021 09:27:14  37.4N  102.9W mb=3.8  EMSC   COLORADO                     

P: 14SEP2021 137071    36.9N  105.1W 2.0-3.9 AABAA  Colorado area              

 

The strong series of light earthquakes in the Canary Islands, Spain continued today. The strongest of today's events was an M 3.9, getting into the range

where moderate quakes could be important in triggering a volcanic eruption or landslide-triggering tsunami. The M 3.9 is the strongest event in the Canary Islands in the past year. While an M 4.8 hit west of the Canary Islands on September 26, 2019, the last in the Canary Islands of M>=3.9 was an M 5.4 on December 27, 2013.  At the time of the activity in December, 2013, this summary noted:

 

"A series of light earthquake began hitting the Canary Islands today. This appears to be a reinvigoration of the eruptive status of El Hierro Volcano and bears watching. This appears to have begun about the time of the full moon and tidal effects may have been an initiating effect. It is also likely that these earthquake were prompted by the renewed solar flare activity which began at the same time these small events began in the Canary Islands." (December 23, 2013)

 

"The swarm under El Hierro volcano in the Canary Islands continued at a reduced rate today. A volcanic eruption does not seem imminent in this region but a strong storm, solar flare or geomagnetic storm combined with strong astronomical tides could intensify this pre-eruption sequence." (December 25, 2013)

 

This earthquake is the strongest since volcanic activity began in 2011. It caused damage to buildings and rock slides but no injuries. Two roads were closed due to rock falls blocking them. A sudden elevation and the previous earthquakes caused local scientists to issue a warning raising the volcano alert level to yellow hours before this earthquake. Strong earthquakes such as this  can lead to subsequent eruptions as they move materials around often opening vents for magma to reach the surface. Residents reported strong shaking and the quake was felt throughout the Canary Islands.

 

This is the strongest earthquake recorded in the past 25 years in the Canary Islands. The largest (and only ) previous earthquake recorded within 250 km of this  epicenter of M>=5.4 occurred on May 22, 1964 with M 5.5. There has been some concern that sliding blocks, perhaps triggered by an earthquake of this size or larger, could slide from the volcanic slopes into the sea generating an Atlantic-wide tsunami." (December 27, 2013)

 

Forecast 137036 had expected today's activity in the Canary Islands between September 12 and 15.

 

O: 13SEP2021 23:14:25  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 23:30:36  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 23:32:17  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 00:19:48  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 03:25:59  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 04:52:13  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 06:00:00  28.6N   17.9W ML=3.9  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 23:10:17  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 AABAA  Canary Islands             

P: 15SEP2021 137036    28.0N   17.0W 3.0-4.5 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: 14SEP2021 04:48:06  29.2N   50.0E ML=3.6  EMSC   PERSIAN GULF                 

P: 11SEP2021 137048    29.0N   53.0E 3.5-5.3 BACAA  So. Iran/Persian Gulf      

 

O: 13SEP2021 15:59:33  37.3N   71.5E mb=4.3  EMSC   HINDU KUSH REGION, AFGHANISTAN

P: 12SEP2021 137074    37.0N   72.0E 3.8-5.4 AAAAA  Hindu Kush/Pakistan        

 

O: 13SEP2021 22:19:50  44.8N   79.7E mb=4.2  EMSC   EASTERN KAZAKHSTAN           

P: 12SEP2021 137123    42.0N   79.0E 4.0-5.6 ACAAA  Kirgizstan/Xinjiang        

 

O: 13SEP2021 10:41:28  24.1N  121.0E mb=4.9  EMSC   TAIWAN                       

O: 13SEP2021 10:41:27  24.1N  121.0E ML=5.6  TAI    Hualien, Taiwan              

P: 15SEP2021 137047    25.0N  122.0E 4.0-5.8 AAAAA  Ryukyu Islands             

 

INDONESIA AND PHILIPPINES

 

O: 13SEP2021 08:36:40   0.6S  127.5E mb=4.6  EMSC   HALMAHERA, INDONESIA         

P: 19SEP2021 136982     3.0S  127.0E 4.0-5.5 CCAAA  Ceram area                 

 

O: 13SEP2021 23:08:59   2.3N  126.9E ML=4.0  EMSC   MOLUCCA SEA                  

P: 12SEP2021 136974     2.0N  128.0E 4.0-5.4 AAAAA  Halmahera                  

 

O: 14SEP2021 05:08:09   3.7S  146.8E ML=4.5  EMSC   BISMARCK SEA

O: 13SEP2021 16:22:49   3.0S  147.5E mb=4.8  EMSC   ADMIRALTY ISLANDS REGION, P.N.

O: 14SEP2021 03:54:03   3.7S  146.9E ML=4.4  EMSC   BISMARCK SEA                 

P: 14SEP2021 136987     5.0S  146.0E 4.0-5.4 ABAAA  New Ireland                

P: 18SEP2021 136987     4.0S  146.0E 4.0-5.6 BAAAA  New Ireland                

 

CENTRAL AND SOUTH AMERICA

 

O: 13SEP2021 12:20:35  10.2N   85.8W mb=4.2  EMSC   COSTA RICA                   

P: 11SEP2021 137021    11.0N   86.0W 3.5-5.5 AAAAA  Nicaragua                  

 

NEIC reported this earthquake of M 4.2 in Costa Rica was felt with intensity II-III in the area(s) of Costa Rica at Samara, Guanacaste.

 

O: 14SEP2021 00:03:05  15.3S   73.7W mb=4.5  EMSC   SOUTHERN PERU                

P: 16SEP2021 137191    15.0S   73.0W 4.0-5.7 AAAAA  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, Peru.

 

O: 13SEP2021 16:33:12  15.7S   70.4W mb=4.4  EMSC   SOUTHERN PERU                

P:  8SEP2021 136929    17.0S   70.0W 4.0-5.6 BBAAA  So. Peru/Bolivia           

 

O: 14SEP2021 02:33:55  16.5S   73.7W ML=4.0  EMSC   NEAR COAST OF SOUTHERN PERU  

P: 14SEP2021 137197    17.0S   74.0W 4.0-5.4 AAAAA  So. Peru/Bolivia           

 

O: 14SEP2021 05:15:17  16.8N   99.7W ML=4.0  EMSC   GUERRERO, MEXICO

O: 14SEP2021 00:02:54  16.8N   99.8W ML=4.2  EMSC   GUERRERO, MEXICO             

P: 14SEP2021 137017    17.0N  100.0W 3.5-5.3 AAAAA  Michoacan, Mexico          

 

O: 13SEP2021 08:38:48  17.1N  101.5W ML=3.9  EMSC   OFFSHORE GUERRERO, MEXICO    

P: 14SEP2021 137018    18.0N  103.0W 3.5-5.2 AAAAA  Michoacan, Mexico          

P: 18SEP2021 137017    17.0N  102.0W 3.5-5.3 BAAAA  Michoacan, Mexico          

 

O: 13SEP2021 08:38:38  17.3N   93.7W ML=3.9  EMSC   VERACRUZ, MEXICO             

P: 18SEP2021 137005    17.0N   94.0W 3.5-5.4 BAAAA  Chiapas, Mexico            

 

O: 14SEP2021 04:31:51  18.4N   73.5W ML=3.5  EMSC   HAITI REGION                 

P: 16SEP2021 137029    19.0N   74.0W 3.4-5.2 AAAAA  Haiti                       

 

O: 13SEP2021 11:57:13  19.0N   65.2W ML=3.3  EMSC   PUERTO RICO REGION           

P: 12SEP2021 137012    19.0N   65.0W 3.0-5.2 AAAAA  Leeward Islands            

 

NEIC reported this earthquake of M 3.8 in Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico in Fajardo and Humacao.

 

O: 14SEP2021 05:11:11  19.0N   68.3W ML=3.3  EMSC   DOMINICAN REPUBLIC REGION    

P: 16SEP2021 137028    19.0N   68.0W 3.4-5.1 AAAAA  Puerto Rico                

 

O: 13SEP2021 07:09:07  19.2N   64.5W ML=3.6  EMSC   VIRGIN ISLANDS REGION

O: 13SEP2021 23:17:09  19.2N   64.3W ML=3.6  EMSC   VIRGIN ISLANDS REGION

O: 13SEP2021 21:49:41  19.1N   64.5W ML=3.0  EMSC   VIRGIN ISLANDS REGION        

P: 12SEP2021 137012    19.0N   65.0W 3.0-5.2 AAAAA  Leeward Islands            

 

NEIC reported this earthquake of M 3.9 in the Virgin Islands was felt with intensity II-III in the area(s) of the Virgin Islands in Christiansted.

 

O: 13SEP2021 08:14:39  19.3N  104.8W ML=3.8  EMSC   JALISCO, MEXICO               

P: 18SEP2021 137018    19.0N  104.0W 3.5-5.3 BAAAA  Michoacan, Mexico          

 

O: 13SEP2021 11:10:00  21.0S   68.7W mb=4.3  EMSC   TARAPACA, CHILE              

P: 14SEP2021 137206    21.0S   69.0W 4.0-5.8 AAAAA  Coast No. Chile             

 

O: 13SEP2021 10:09:41  24.2S   66.9W mb=4.5  EMSC   SALTA, ARGENTINA             

P: 14SEP2021 137204    23.0S   66.0W 4.0-5.5 ABAAA  Argentina                  

 

O: 14SEP2021 04:12:31  31.7S   72.1W mb=4.7  EMSC   OFFSHORE COQUIMBO, CHILE

O: 14SEP2021 01:56:36  31.7S   71.9W Mw=4.8  EMSC   OFFSHORE COQUIMBO, CHILE     

P: 16SEP2021 137219    32.0S   72.0W 4.0-5.8 AAAAA  Central Chile              

 

NEIC reported this earthquake of M 4.8 in Valparaiso, Chile was felt with intensity IV-V   in the area(s) of Valparaiso, Chile with V in Vina del Mar and Quilpue; IV in La Ligua and Quillota and II in Santiago.

NEIC reported an aftershock of M 4.4 in Coquimbo, Chile was felt with intensity II-III in the area(s) of Coquimbo, Chile at Vina Del Mar, Valparaiso and in Santiago, Chile.

 

O: 13SEP2021 11:22:01  37.3S   75.0W mb=4.6  EMSC   OFF COAST OF BIO-BIO, CHILE  

P: 16SEP2021 137220    38.0S   74.0W 4.0-5.6 BAAAA  Central Chile              

 

 

AFRICA AND EUROPE

 

O: 13SEP2021 23:10:17  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 AABAA  Canary Islands             

P: 15SEP2021 137036    28.0N   17.0W 3.0-4.5 AAAAA  Canary Islands             

 

O: 13SEP2021 08:01:11  35.1N   26.6E ML=3.9  EMSC   CRETE, GREECE                

P: 15SEP2021 137053    36.0N   27.0E 3.0-4.8 AAAAA  Aegean Sea                 

 

O: 13SEP2021 10:36:31  48.3N    9.0E ML=3.4  EMSC   GERMANY                      

P: 14SEP2021 137114    48.0N    7.0E 3.0-5.3 AABAA  Austria                    

 

O: 14SEP2021 02:32:01  79.3N    5.7E mb=4.5  EMSC   SVALBARD REGION              

 

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

 

SOUTHWEST PACIFIC

 

O: 13SEP2021 17:13:34  15.7S  167.8E mb=4.9  EMSC   VANUATU                      

P:  9SEP2021 136934    16.0S  168.0E 4.0-5.4 BAAAA  Vanuatu Islands            

 

O: 13SEP2021 11:45:13  17.9S  178.5W mb=4.5  EMSC   FIJI REGION                  

P: 14SEP2021 137199    18.0S  180.0W 4.0-5.8 AABAA  Tonga Islands              

 

O: 13SEP2021 14:43:17  22.6S  177.8W mb=4.6  EMSC   SOUTH OF FIJI ISLANDS        

P: 13SEP2021 137215    23.0S  177.0W 4.0-5.6 AAAAA  Tonga Islands              

 

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

 

OCEAN RIDGES

 

O: 13SEP2021 23:14:25  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 23:30:36  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 23:32:17  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 00:19:48  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 03:25:59  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 04:52:13  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 14SEP2021 06:00:00  28.6N   17.9W ML=3.9  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 23:10:17  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 AABAA  Canary Islands              

P: 15SEP2021 137036    28.0N   17.0W 3.0-4.5 AAAAA  Canary Islands             

 

 

O: 13SEP2021 14:11:27  60.0S   26.3W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 13SEP2021 23:58:00  58.9S   25.1W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 AAAAA  So. Sandwich Islands       

 

 

ZEALANDIA AND AUSTRALIA REGION

 

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

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

 

JAPAN AND KURIL ISLANDS

 

O: 13SEP2021 22:46:06  32.5N  137.8E Mw=5.8  EMSC   IZU ISLANDS, JAPAN REGION    

P: 13SEP2021 137070    33.0N  137.0E 3.5-4.9 AAAAA  Central/So. Honshu Japan   

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 13SEP2021 09:51:06  30.9N  114.2W ML=3.8  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 09:53:10  30.9N  114.2W ML=3.6  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 19:52:11  30.9N  114.2W ML=3.7  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 20:35:09  30.9N  114.2W ML=3.6  EMSC   GULF OF CALIFORNIA

O: 14SEP2021 05:40:53  31.0N  113.8W ML=3.7  EMSC   GULF OF CALIFORNIA

O: 13SEP2021 20:14:51  30.8N  114.2W ML=3.6  EMSC   GULF OF CALIFORNIA           

P: 14SEP2021 137038    30.0N  114.0W 3.5-4.9 AAAAA  Gulf of California         

 

O: 13SEP2021 12:25:08  32.7N  115.8W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P: 14SEP2021 137094    32.6N  116.1W 2.5-4.7 AAAAA  So. California             

 

O: 14SEP2021 02:29:06  34.0N  117.0W Ml=2.2  EMSC   SOUTHERN CALIFORNIA          

P: 13SEP2021 137097    34.1N  117.4W 2.5-4.4 AAAAA  So. California             

P: 19SEP2021 137096    33.9N  116.9W 2.5-4.8 BAAAA  So. California             

 

O: 13SEP2021 14:59:33  34.2N  119.0W Mw=3.6  EMSC   GREATER LOS ANGELES AREA, CALI

P: 10SEP2021 136834    34.0N  118.7W 2.5-4.6 BAAAA  So. California             

P: 17SEP2021 137095    34.0N  118.7W 2.5-4.6 BAAAA  So. California             

 

O: 14SEP2021 01:22:22  35.7N  121.0W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P: 13SEP2021 137090    35.8N  121.3W 2.5-4.6 AAAAA  Off So. California         

 

O: 13SEP2021 14:07:02  37.6N  119.4W Md=2.5  EMSC   CENTRAL CALIFORNIA           

P: 15SEP2021 137058    37.3N  119.4W 2.5-4.6 AAAAA  California/Nevada area     

 

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

 

O: 13SEP2021 20:17:56  38.1N  122.2W Mh=2.2  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 14SEP2021 137066    38.0N  122.3W 2.5-4.8 AAAAA  Central California         

P: 15SEP2021 137066    37.9N  122.0W 2.5-4.6 AAAAA  Central California         

 

O: 13SEP2021 13:00:55  38.6N  119.5W Md=2.2  EMSC   CENTRAL CALIFORNIA

O: 13SEP2021 10:48:57  38.9N  119.7W ml=2.0  EMSC   NEVADA

O: 13SEP2021 13:00:55  38.6N  119.5W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P: 17SEP2021 137062    38.3N  119.3W 2.5-4.6 BAAAA  California/Nevada area     

 

O: 13SEP2021 20:09:16  39.4N  118.6W ml=2.1  EMSC   NEVADA                       

P: 10SEP2021 136800    38.2N  118.8W 2.5-4.4 BBAAA  California/Nevada area     

 

 

ALASKA

 

O: 14SEP2021 05:56:37  64.4N  146.8W Mw=4.7  EMSC   CENTRAL ALASKA               

P: 11SEP2021 137180    62.7N  149.3W 3.2-5.3 BBBAA  Central Alaska             

P: 19SEP2021 137181    63.0N  148.6W 3.2-5.3 BBAAA  Central Alaska             

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 13SEP2021 13:32:42  47.5N  121.9W Md=2.3  EMSC   WASHINGTON                   

P: 20SEP2021 137151    47.5N  121.8W 2.0-4.4 CAAAA  Washington state, U.S.     

 

O: 13SEP2021 00:37:25  50.7N  130.5W MB=3.0  ECAN Port Hardy, BC                 

O: 13SEP2021 00:28:01  50.7N  130.5W MB=3.4  ECAN Port Hardy, BC                 

P: 17SEP2021 137158    52.0N  131.0W 3.0-4.9 BBAAA  British Colombia           

 

ROCKY MOUNTAINS REGION

 

O: 14SEP2021 06:28:44  31.7N  104.4W ML=2.3  EMSC   WESTERN TEXAS

O: 13SEP2021 14:58:03  31.8N  103.8W ML=2.4  EMSC   WESTERN TEXAS                

P: 14SEP2021 137091    31.6N  103.6W 2.0-4.0 AAAAA  SW U.S.A                   

P: 18SEP2021 137091    32.5N  104.6W 2.0-4.0 BAAAA  SW U.S.A                   

 

O: 13SEP2021 09:27:14  37.4N  102.9W mb=3.8  EMSC   COLORADO                     

P: 14SEP2021 137071    36.9N  105.1W 2.0-3.9 AABAA  Colorado area              

 

EASTERN U.S./CANADA

 

O: 13SEP2021 09:27:14  37.4N  102.9W mb=3.8  EMSC   COLORADO                     

P: 14SEP2021 137071    36.9N  105.1W 2.0-3.9 AABAA  Colorado area              

 

O: 13SEP2021 18:26:21  34.3N   96.4W ML=2.1  EMSC   OKLAHOMA                     

O: 13SEP2021 14:03:04  35.1N   95.4W ML=2.0  EMSC   OKLAHOMA                     

P: 11SEP2021 137105    35.0N   96.0W 2.0-4.0 AAAAA  Southern Plains            

 

O: 10SEP2021 08:22:30  72.0N   75.1W MB=3.4  ECAN Pond Inlet, NU                 

P: 13SEP2021 137185    74.0N   73.0W 2.5-4.3 BBAAA  Nunavit/Hudson Bay, Canada 

 

HAWAII

 

O: 13SEP2021 17:58:49  21.5N  157.2W ML=3.4  EMSC   OAHU REGION, HAWAII          

P: 18SEP2021 137039    20.1N  156.1W 4.0-5.6 BBAAA  Hawaii area                

 

STRONG M 6.2 SHAKES JUJUY, ARGENTINA

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 12, 2021

 

A strong earthquake of M 6.2 shook the area on the northern Argentina-Chile border in the Jujuy, Argentina area. NEIC reported maximum shaking of VII in Jujuy and VI in Salta, Argentina. Inensity V was reported from Tucumen, Argentina and IV in Bolivia at Tarija, Potosi and Villazon, Bolivia and in Antofagasta, Chile with intensity III. GUC reported this earthquake was felt with intensity  IV in  Atacama at Caldera, Chanaral, Copiapo, Diego de Almagro, Tierra Amarilla; Antofagasta with IV in Antofagasta, Baquedano, Maria Elena, Mejillone, Sierra Gorda, Taltal, Tocopill III in Calama and II in Sierra Gorda, Chile. A similar earthquake of M 6.3 hit south of this on November 30, 2020 and prior to that an M 6.3 on April 15, 2017. Today's mainshock occurred near local solar midnight and was probably promoted by tidal stresses which maximize near this hour. Forecast 137204 had expected today's activity was likely within about 150 km around September 14. This epicenter, like the M 4.2 in Hawaii today is located at the seventh node (52 degrees) from the M 7.1 in Mexico of September 8, 2021 and was probably promoted by energy from that source.

 

O: 12SEP2021 11:45:59  24.1S   66.8W ML=3.6  EMSC   JUJUY, ARGENTINA

O: 12SEP2021 13:54:08  24.1S   67.5W mb=4.2  EMSC   SALTA, ARGENTINA

O: 13SEP2021 05:18:11  23.9S   67.0W Mw=6.2  EMSC   JUJUY, ARGENTINA             

O: 13SEP2021 05:18     23.8S   67.5W mb=6.1  GUC    Atacama at Caldera, Chanaral,

P: 14SEP2021 137204    23.0S   66.0W 4.0-5.5 AAAAA  Argentina                  

 

An M 3.8-4.2 was widely felt in Hawaii today. NEIC reported intensity II-III in Hawaii at Hawaii National Park, Naalehu, Volcano, Captain Cook, Mountain View, Hilo, Kailua Kona, Kamuela, Kapauu. The area has been seeing increased and enhanced seismicity for several weeks. But the last earthquake in Hawaii of M>=4.2 occurred on August 18 (M 4.4) and June 3 (M 4.5). Forecast 137010 had expected today's activity in Hawaii was likely around September 14.

 

O: 12SEP2021 11:45:04  19.2N  155.4W ML=4.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 12SEP2021 14:31:45  19.2N  155.5W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 14SEP2021 137010    18.8N  155.2W 3.0-4.4 AAAAA  Hawaii                      

 

The series of light earthquakes continued today in western Texas with the largest of the day an M 3.8. NEIC reported this earthquake of M 2.6 in Western Texas was felt with intensity II-III in the area(s) of Western Texas at Rotan.

This is an aftershock of an M 3.6 in western Texas which was reported by NEIC to have been felt with intensity IV in Rotan, Snyder and II-III in Roby, Hamlin, Jayton, Hughes Springs and in Elmore City, Oklahoma. This area increased its activity on September 8, 2021 following an M 4.0-4.2 at that time and was noted in this summary as:

 

"A series of earthquakes north of Mexico in Western Texas was also energized today. The strongest of these was an M 4.2 but the swarm began near local solar  midnight about 6 hours after the M 7.0 in Mexico and may have been promoted from Mexico or by tidal and geomagnetic stresses. An M 4.2 last occurred in this area on September 3 and is among the four largest such events in the region in the past year. Many of these have occurred at full or new moons and appear tidally related." (September 9, 2021)

 

Forecast 137091 had expected enhanced seismicity in this area was likely around

September 14.

 

O: 12SEP2021 15:37:16  31.6N  104.2W ML=2.8  EMSC   WESTERN TEXAS

O: 12SEP2021 21:04:15  31.6N  104.2W ML=2.5  EMSC   WESTERN TEXAS

O: 12SEP2021 21:15:42  31.6N  104.2W ML=2.5  EMSC   WESTERN TEXAS

O: 12SEP2021 10:21:52  31.8N  103.8W ML=2.6  EMSC   WESTERN TEXAS

O: 12SEP2021 23:20:21  31.8N  103.8W ML=3.2  EMSC   WESTERN TEXAS

O: 12SEP2021 13:30:08  31.6N  104.2W ML=3.8  EMSC   WESTERN TEXAS                

P: 14SEP2021 137091    31.6N  103.6W 2.0-4.0 AAAAA  SW U.S.A                   

 

The strongest earthquake in the U.S. or Canada today was an M 4.7 in the Unimak Island region of Alaska. This appears to be an aftershock of the M 5.1 on September 9, 2021. At the time this summary noted in this regard:

 

"The strongest earthquake in the U.S. or Canada today was an M 5.1 in the Unimak Island Region, Aleutians, Alaska. It was not reported felt in this remote area. The only earthquakes of M>=5 in the Unimak Islands in the past year were an M 5.1 on January 11, 2021 and an M 5.0 on November 4, 2020. Both occurred about 100 km west of today's epicenter. Forecast 136908 had expected today's activity was likely in early September within about 100 km of today's epicenters." (September 9, 2021)

 

Forecast 137171 had expected today's event within about 100 km was likely around

September 11.

 

O: 12SEP2021 17:03:09  53.4N  163.5W mb=4.7  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 11SEP2021 137171    54.1N  162.8W 3.5-5.1 AAAAA  Unimak Islands, Aleutians  

 

A strong series of earthquakes occurred in the Canary Islands today. More than 150 events were initially recorded. These may be foreshocks to a larger event or to a volcanic eruption perhaps at Teneriffe. This series began shortly after a Gamma Ray Burst (GMB) with maximum events around local solar midnight and may have been triggered by effects from these events. In the previous summary this summary had noted this as:

 

"A series of minor earthquakes has been occurring the Canary Islands of Spain over the past week. This may be exacerbated by a tropical weather system which

 is currently located north of the Canary Islands and which may become a tropical depression. Low atmospheric pressures from tropical depressions can help unload volcanic areas such as this leading to volcanism." (September 12, 2021)

 

Forecasts 136777 and 137036 had expected this activity was likely around September 10-12. This area is at the 7th node (51.4 degrees) from the M 7.2 of August 14, 2021 and may have been promoted by energy from that source.

 

O: 12SEP2021 23:56:08  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 00:05:33  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 00:15:10  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 00:21:06  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 02:56:11  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:02:56  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:08:00  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:13:31  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:23:31  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:36:47  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 12SEP2021 23:46:55  28.6N   17.9W ML=3.4  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 10SEP2021 136777    28.0N   16.0W 3.0-4.6 AABAA  Canary Islands             

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 AABAA  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: 13SEP2021 04:02:32  37.2N   58.9E Mw=5.1  EMSC   NORTHEASTERN IRAN            

P: 10SEP2021 136822    37.0N   59.0E 3.8-5.2 BAAAA  No. Iran                   

 

NEIC reported this earthquake of M 5.1 in Iran was felt with intensity II-IV in the area(s) of Iran at Darreh Gaz, Meshed Khorasan-e Razavl and in Asgabat, Naysabur and Mari Mari.

 

O: 13SEP2021 03:46:46  33.7N   76.3E mb=4.3  EMSC   KASHMIR-INDIA BORDER REGION  

P: 14SEP2021 137086    35.0N   78.0E 3.8-5.4 ABBAA  Northern India             

 

O: 12SEP2021 19:04:37  70.3N  129.9E mb=4.3  EMSC   NORTHWESTERN SAKHA, RUSSIA   

 

INDONESIA AND PHILIPPINES

 

O: 12SEP2021 09:02:19   0.5S   99.7E Mw=5.0  EMSC   SOUTHERN SUMATRA, INDONESIA  

P: 10SEP2021 136739     2.0S  101.0E 4.0-5.6 ABBAA  So. of Sumatera            

 

O: 12SEP2021 10:44:15   2.7S  139.2E ML=4.6  EMSC   NEAR N COAST OF PAPUA, INDONES

P: 14SEP2021 136998     5.0S  139.0E 4.0-5.7 ACAAA  West Irian, PNG            

 

O: 12SEP2021 13:34:34   3.7N  128.8E mb=4.7  EMSC   NORTH OF HALMAHERA, INDONESIA

P: 12SEP2021 136974     2.0N  128.0E 4.0-5.4 ABAAA  Halmahera                  

 

O: 12SEP2021 12:14:44   5.5N  126.4E mb=4.4  EMSC   MINDANAO, PHILIPPINES        

P: 15SEP2021 136975     6.0N  124.0E 4.0-5.4 BACAA  Mindanao, Philippines      

 

O: 12SEP2021 13:10:03   8.3S  119.5E mb=4.6  EMSC   FLORES REGION, INDONESIA     

P: 13SEP2021 136996     8.0S  119.0E 4.0-5.4 AAAAA  Sumbawa Island area        

 

 

CENTRAL AND SOUTH AMERICA

 

 

O: 12SEP2021 10:59:59   8.6S   80.5W mb=4.7  EMSC   OFF COAST OF NORTHERN PERU   

P: 15SEP2021 136990     9.0S   80.0W 4.0-5.5 BAAAA  No. Peru                   

 

O: 12SEP2021 16:16:30   8.9N   85.5W ML=4.2  EMSC   OFF COAST OF COSTA RICA      

P: 12SEP2021 136972     9.0N   84.0W 3.5-5.1 AABAA  Costa Rica                 

 

O: 12SEP2021 09:32:29  14.5N   93.7W mb=4.6  EMSC   OFF COAST OF CHIAPAS, MEXICO 

P: 11SEP2021 137004    15.0N   93.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 12SEP2021 15:05:19  16.6N  100.5W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO    

P: 14SEP2021 137017    17.0N  100.0W 3.5-5.3 AAAAA  Michoacan, Mexico          

 

O: 12SEP2021 19:07:49  16.8N   93.8W ML=4.3  EMSC   CHIAPAS, MEXICO              

P: 11SEP2021 137004    15.0N   93.0W 3.5-5.1 ABAAA  Chiapas, Mexico            

 

NEIC reported an earthquake of M 3.2 in Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico at Adjuntas.

 

O: 12SEP2021 08:28:42  18.4N   73.8W ML=3.7  EMSC   HAITI REGION

O: 12SEP2021 21:11:15  18.3N   74.1W ML=3.4  EMSC   HAITI REGION                 

P: 16SEP2021 137029    19.0N   74.0W 3.4-5.2 BAAAA  Haiti                      

 

O: 12SEP2021 21:45:02  21.7N  101.0W ML=3.8  EMSC   GUANAJUATO, MEXICO

O: 12SEP2021 10:29:23  21.6N  101.1W ML=4.1  EMSC   GUANAJUATO, MEXICO           

P: 11SEP2021 137045    20.0N   99.0W 3.0-4.7 ABBAA  Northern Mexico            

 

O: 13SEP2021 05:18:11  23.9S   67.0W Mw=6.2  EMSC   JUJUY, ARGENTINA             

O: 13SEP2021 05:18     23.8S   67.5W mb=6.1  GUC    Atacama at Caldera, Chanaral,

P: 14SEP2021 137204    23.0S   66.0W 4.0-5.5 AAAAA  Argentina                  

 

O: 13SEP2021 04:12:28  30.0S   72.0W mb=4.7  EMSC   OFFSHORE COQUIMBO, CHILE     

P: 12SEP2021 137218    31.0S   69.0W 4.0-5.5 AACAA  Central Chile              

 

O: 12SEP2021 11:45:59  24.1S   66.8W ML=3.6  EMSC   JUJUY, ARGENTINA

O: 12SEP2021 13:54:08  24.1S   67.5W mb=4.2  EMSC   SALTA, ARGENTINA

O: 13SEP2021 05:18:11  23.9S   67.0W Mw=6.2  EMSC   JUJUY, ARGENTINA             

P: 14SEP2021 137204    23.0S   66.0W 4.0-5.5 AAAAA  Argentina                  

 

AFRICA AND EUROPE

 

O: 13SEP2021 06:15:36  74.2N   10.7E mb=4.8  EMSC   NORWEGIAN SEA                

P: 18SEP2021 137188    72.0N    0.0E 3.0-4.8 BCAAA  Norway                     

 

O: 12SEP2021 23:56:08  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 00:05:33  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 00:15:10  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 00:21:06  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 02:56:11  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:02:56  28.6N   17.9W ML=3.1  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:08:00  28.6N   17.9W ML=3.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:13:31  28.6N   17.9W ML=3.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:23:31  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 13SEP2021 03:36:47  28.6N   17.9W ML=3.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 12SEP2021 23:46:55  28.6N   17.9W ML=3.4  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 10SEP2021 136777    28.0N   16.0W 3.0-4.6 AABAA  Canary Islands             

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 AABAA  Canary Islands             

 

O: 12SEP2021 10:08:11  38.1N   23.8E ML=3.4  EMSC   GREECE                       

P: 11SEP2021 137082    38.0N   21.0E 3.0-4.6 AABAA  No. Greece                 

 

NEIC reported this earthquake of M 3.1 in northern Greece was felt with intensity II-III in the area(s) of northern Greece at Ayia Paraskevi (V) and in Attiki.

 

O: 13SEP2021 01:22:51  53.1N    9.2E ML=2.9  EMSC   GERMANY                       

P: 14SEP2021 137166    52.0N   16.0E 3.0-4.7 ABCAA  Poland                     

 

NEIC reported this earthquake of M 2.9 in Germany was felt with intensity II-IV in the area(s) of Germany at Ottersberg, Langwedel, Achim, Bremen and Blender.

 

SOUTHWEST PACIFIC

 

O: 12SEP2021 11:57:36  15.4S  174.4W Mw=5.2  EMSC   TONGA                        

P: 17SEP2021 137199    16.0S  173.0W 4.0-5.6 BAAAA  Tonga Islands              

 

OCEAN RIDGES

 

O: 13SEP2021 06:15:36  74.2N   10.7E mb=4.8  EMSC   NORWEGIAN SEA                

P: 18SEP2021 137188    72.0N    0.0E 3.0-4.8 BCAAA  Norway                     

 

O: 13SEP2021 02:34:04  59.8S   26.3W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 12SEP2021 137234    58.0S   25.0W 4.0-5.8 ABAAA  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: 12SEP2021 21:31:30  34.9N  139.8E ML=4.3  EMSC   NEAR S. COAST OF HONSHU, JAPAN

P: 17SEP2021 137070    34.0N  139.0E 3.5-4.9 BAAAA  Central/So. Honshu Japan   

 

O: 12SEP2021 16:36:10  37.8N  142.0E mb=4.4  EMSC   OFF EAST COAST OF HONSHU, JAPA

P: 17SEP2021 137089    38.0N  142.0E 4.0-5.4 BAAAA  Off East Coast Honshu      

 

O: 13SEP2021 04:59:45  39.3N  142.8E mb=4.8  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 15SEP2021 137119    40.0N  143.0E 3.5-5.4 AAAAA  Hokkaido, Japan            

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 12SEP2021 17:33:52  31.0N  115.1W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO

O: 12SEP2021 16:38:38  31.0N  115.1W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO      

P: 12SEP2021 137092    31.9N  116.3W 2.5-4.8 AAAAA  So. California             

 

O: 12SEP2021 21:31:27  35.8N  117.6W Ml=2.3  EMSC   SOUTHERN CALIFORNIA          

P: 14SEP2021 137055    35.7N  117.7W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 12SEP2021 15:04:30  36.6N  121.3W Md=2.0  EMSC   CENTRAL CALIFORNIA           

P: 14SEP2021 137065    36.4N  121.0W 2.5-4.6 AAAAA  Central California         

 

O: 13SEP2021 03:48:56  37.6N  117.9W ml=2.1  EMSC   NEVADA

O: 12SEP2021 12:46:08  37.3N  117.6W ML=2.3  EMSC   CENTRAL CALIFORNIA           

P: 11SEP2021 137059    37.4N  117.2W 2.5-4.9 AAAAA  California/Nevada area     

 

NEIC reported this earthquake of M 3.7 in Western Nevada was felt with intensity II-III in the area(s) of Western Nevada at Glenbrook.

 

O: 13SEP2021 02:20:05  40.3N  124.5W Md=2.4  EMSC   OFFSHORE NORTHERN CALIFORNIA

O: 12SEP2021 13:54:26  40.3N  124.4W ML=2.1  EMSC   NORTHERN CALIFORNIA          

P: 13SEP2021 137136    40.2N  124.2W 2.5-4.6 AAAAA  Off Coast of No. Calif     

 

O: 12SEP2021 20:49:37  40.6N  122.2W Md=2.1  EMSC   NORTHERN CALIFORNIA          

P: 15SEP2021 137135    40.6N  122.4W 2.5-4.5 BAAAA  Northern California        

 

ALASKA

 

O: 12SEP2021 17:03:09  53.4N  163.5W mb=4.7  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 11SEP2021 137171    54.1N  162.8W 3.5-5.1 AAAAA  Unimak Islands, Aleutians  

 

O: 13SEP2021 06:11:42  59.7N  151.0W ml=3.2  EMSC   KENAI PENINSULA, ALASKA      

P: 14SEP2021 137176    60.1N  150.6W 3.2-5.3 AAAAA  Central Alaska             

 

NEIC reported this earthquake of M 3.2 in Kenai Peninsula, Alaska was felt with intensity II-III in the area(s) of Kenai Peninsula, Alaska at Homer.

 

O: 13SEP2021 03:16:03  63.1N  151.6W mb=3.6  EMSC   CENTRAL ALASKA               

P: 15SEP2021 137181    63.2N  151.4W 3.2-5.3 AAAAA  Central Alaska             

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 12SEP2021 15:11:27  46.7N  122.5W Md=2.3  EMSC   WASHINGTON                   

P: 13SEP2021 137140    45.3N  121.7W 2.0-4.0 ABAAA  Oregon state, U.S.         

 

ROCKY MOUNTAINS REGION

 

O: 12SEP2021 15:37:16  31.6N  104.2W ML=2.8  EMSC   WESTERN TEXAS

O: 12SEP2021 21:04:15  31.6N  104.2W ML=2.5  EMSC   WESTERN TEXAS

O: 12SEP2021 21:15:42  31.6N  104.2W ML=2.5  EMSC   WESTERN TEXAS

O: 12SEP2021 10:21:52  31.8N  103.8W ML=2.6  EMSC   WESTERN TEXAS

O: 12SEP2021 23:20:21  31.8N  103.8W ML=3.2  EMSC   WESTERN TEXAS

O: 12SEP2021 13:30:08  31.6N  104.2W ML=3.8  EMSC   WESTERN TEXAS                

P: 14SEP2021 137091    31.6N  103.6W 2.0-4.0 AAAAA  SW U.S.A                   

 

O: 12SEP2021 11:26:43  32.8N  100.7W mb=3.8  EMSC   WESTERN TEXAS

O: 12SEP2021 12:57:10  32.8N  100.7W mb=2.6  EMSC   WESTERN TEXAS

O: 13SEP2021 02:48:55  32.8N  100.7W mb=2.4  EMSC   WESTERN TEXAS                

P: 14SEP2021 137091    31.6N  103.6W 2.0-4.0 AABAA  SW U.S.A                   

 

O: 12SEP2021 18:05:57  44.3N  115.1W ML=3.2  EMSC   SOUTHERN IDAHO                

P: 13SEP2021 137126    44.4N  115.1W 2.0-4.0 AAAAA  Montana/Idaho              

 

NEIC reported this earthquake of M 3.2 in Southern Idaho was felt with intensity II-III in the area(s) of Southern Idaho at McCall.

 

EASTERN U.S./CANADA

 

O: 13SEP2021 04:04:59  36.2N   89.4W mb=3.2  EMSC   TENNESSEE                    

P: 14SEP2021 137081    36.9N   89.2W 2.0-4.1 AAAAA  New Madrid area            

 

NEIC reported this earthquake of M 3.1 in Tennessee was felt with intensity II-III in the area(s) of Tennessee with IV in Ridgely and Obion and in Hornbeak, Tiptonville, Newbern, Dyersburg, Troy, and in Missouri at Caruthersville, Portageville and in Fulton, Kentucky.

 

O: 12SEP2021 22:04:50  36.8N   98.1W ML=2.5  EMSC   OKLAHOMA

O: 13SEP2021 03:31:54  36.8N   98.1W ML=2.3  EMSC   OKLAHOMA

O: 13SEP2021 00:49:55  36.7N   97.7W ML=2.1  EMSC   OKLAHOMA                     

P: 11SEP2021 137106    36.0N   98.0W 2.0-4.3 AAAAA  Southern Plains            

 

HAWAII

 

O: 12SEP2021 11:45:04  19.2N  155.4W ML=4.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 12SEP2021 14:31:45  19.2N  155.5W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 14SEP2021 137010    18.8N  155.2W 3.0-4.4 AAAAA  Hawaii                     

 

MODERATE ACTIVITY IN KURIL; SOUTH SANDWICH ISLANDS

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 11, 2021

 

The strongest earthquakes in the world today were an M 5.3 in the Kuril Islands and an M 5.5 in the South Sandwich Islands. The event in the Kuril Islands is the strongest earthquake in this region northwest of the Kuril Islands since an M 5.5 on July 9, 2019 and prior to that an M 6.0 on November 2, 2018. Forecastg 137156 had expected today's activity within about 50 km was likely around September 11. This event occurred within minutes of local solar midnight and may have been promoted by strong tidal stresses which maximize near this hour.

 

O: 12SEP2021 02:32:25  47.2N  146.8E Mw=5.3  EMSC   NORTHWEST OF KURIL ISLANDS   

P: 11SEP2021 137146    47.0N  146.0E 3.5-5.4 AAAAA  So. Kurils                 

 

The M 5.5 in the South Sandwich Islands was not far from the antipode of the Kuril Islands event of M 5.3. This is part of the aftershock sequence following the M 8.1 in the South Sandwich Islands of August 12, 2021. Forecast 136964 had expected today's activity around September 9. This activity was near local solar noon and may have been promoted by high tidal stresses.

 

O: 11SEP2021 12:43:53  57.4S   26.1W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 11SEP2021 09:23:03  59.6S   26.4W Mw=5.5  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 11SEP2021 09:10:47  56.1S   27.9W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 AAAAA  So. Sandwich Islands       

 

The activity in the South Shetland Islands west of the South Sandwich Islands re-energized today with an M 4.8. This continues activity in this area which concentrated in April 1021. The only earthquake of M>=4.8 in the region in the past three month was an M 4.9 on August 28, 2021. Forecast 137235 had expected today's activity was likely in the South Shetland Islands in mid-September.

 

O: 12SEP2021 03:58:21  62.3S   57.9W mb=4.8  EMSC   SOUTH SHETLAND ISLANDS       

P: 15SEP2021 137235    61.0S   58.0W 4.0-5.6 BBAAA  Southern  Ocean            

 

The strongest earthquake in the U.S. or Canada today was an M 3.6 in Southern Alaska. NEIC reported this earthquake of M 3.4 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Wasilla, Willow, Anchorage, Chugiak. This is not an uncommon earthquake for southern Alaska and is probably an aftershock of the M 7.0 in the Anchorage, Alaska area of November 30, 2018. The last such aftershock of M>=3.6 hit the area as an M 4.3 on August 12, 2021 with the M 8.1 in the South Sandwich Islands. Forecast 137176 had expected today's activity around September 14.

 

O: 11SEP2021 16:20:54  61.5N  149.9W ML=3.6  EMSC   SOUTHERN ALASKA              

P: 14SEP2021 137176    60.1N  150.6W 3.2-5.3 BAAAA  Central Alaska              

 

A series of minor earthquakes has been occurring the the Canary Islands of Spain over the past week. This may be exacerbated by a tropical weather system which

is currently located north of the Canary Islands and which may become a tropical depression. Low atmospheric pressures from tropical depressions can help unload volcanic areas such as this leading to volcanism.

 

O: 12SEP2021 00:16:12  28.5N   17.8W ML=1.5  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 10SEP2021 136777    28.0N   16.0W 3.0-4.6 AAAAA  Canary Islands             

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 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: 11SEP2021 22:45:19  27.3N   54.6E mb=4.4  EMSC   SOUTHERN IRAN

O: 11SEP2021 20:55:22  27.3N   54.7E ML=4.0  EMSC   SOUTHERN IRAN                

P: 13SEP2021 137048    28.0N   54.0E 3.5-5.1 AAAAA  So. Iran/Persian Gulf      

 

NEIC reported these earthquakes of M 4.0 and 4.4 in Iran were felt with intensity II-III in the area(s) of Iran in Hormozgan at Bandar-e Langen, Bandar Abbas and Gheshm and in the United Arab Emirates.

 

O: 12SEP2021 06:10:01  36.2N   70.5E mb=4.4  EMSC   HINDU KUSH REGION, AFGHANISTAN

P: 12SEP2021 137074    37.0N   72.0E 3.8-5.4 AAAAA  Hindu Kush/Pakistan        

 

INDONESIA AND PHILIPPINES

 

O: 11SEP2021 19:45:48   0.9N  126.3E ML=4.4  EMSC   MOLUCCA SEA                  

P: 12SEP2021 136974     2.0N  128.0E 4.0-5.4 ABBAA  Halmahera                  

 

O: 11SEP2021 08:38:22   1.6S  128.0E ML=4.1  EMSC   KEPULAUAN OBI, INDONESIA     

P:  9SEP2021 136727     3.0S  127.0E 4.0-5.4 ABAAA  Ceram area                  

 

O: 11SEP2021 20:14:36   5.4N  126.4E ML=4.6  EMSC   MINDANAO, PHILIPPINES        

P: 15SEP2021 136975     6.0N  124.0E 4.0-5.4 BABAA  Mindanao, Philippines      

 

O: 11SEP2021 09:40:11   7.0S  125.1E mb=4.8  EMSC   BANDA SEA                     

P: 19SEP2021 136979     7.0S  126.0E 4.0-5.4 CAAAA  Banda Sea                  

 

O: 11SEP2021 14:29:06   9.2S  118.8E ML=4.0  EMSC   SUMBAWA REGION, INDONESIA    

P: 13SEP2021 136996     8.0S  119.0E 4.0-5.4 ABAAA  Sumbawa Island area        

 

O: 11SEP2021 14:19:10  11.9N  144.4E mb=4.7  EMSC   SOUTH OF MARIANA ISLANDS     

P:  9SEP2021 136772    13.0N  144.0E 4.0-5.4 ABAAA  So. Marianas/Guam          

 

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

 

CENTRAL AND SOUTH AMERICA

 

 

O: 11SEP2021 21:24:25   8.6S   80.6W mb=4.4  EMSC   OFF COAST OF NORTHERN PERU   

P: 15SEP2021 136990     9.0S   80.0W 4.0-5.5 BAAAA  No. Peru                   

 

NEIC reported this earthquake of M 4.4 in Southern Peru was felt with intensity II-III in the area(s) of Southern Peru at Tacna.

 

O: 12SEP2021 01:12:30   9.4N   84.7W ML=4.0  EMSC   COSTA RICA                   

O: 12SEP2021 01:20:30   9.4N   84.7W ML=4.6  EMSC   COSTA RICA

P:  8SEP2021 136717     9.0N   84.0W 3.5-5.1 BAAAA  Costa Rica                 

P: 12SEP2021 136972     9.0N   84.0W 3.5-5.1 AAAAA  Costa Rica                 

 

O: 11SEP2021 14:08:20  10.1S   78.8W ML=4.0  EMSC   NEAR COAST OF CENTRAL PERU   

P: 15SEP2021 136990     9.0S   80.0W 4.0-5.5 BBAAA  No. Peru                   

 

O: 11SEP2021 11:06:30  10.6N   86.0W ML=4.3  EMSC   COSTA RICA

O: 11SEP2021 10:54:30  10.5N   86.2W ML=4.1  EMSC   OFF COAST OF COSTA RICA      

P: 11SEP2021 137021    11.0N   86.0W 3.5-5.5 AAAAA  Nicaragua                   

 

O: 11SEP2021 10:27:41  14.9N   93.4W ML=4.0  EMSC   OFFSHORE CHIAPAS, MEXICO     

P: 11SEP2021 137004    15.0N   93.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 11SEP2021 09:21:28  16.5N   99.8W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 11SEP2021 21:56:05  17.1N   99.9W ML=4.1  EMSC   GUERRERO, MEXICO

O: 11SEP2021 12:01:41  16.4N  100.0W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO    

P: 14SEP2021 137017    17.0N  100.0W 3.5-5.3 BAAAA  Michoacan, Mexico          

 

O: 12SEP2021 04:10:25  17.9N   67.1W Md=3.3  EMSC   PUERTO RICO REGION           

O: 12SEP2021 06:48:22  17.9N   67.1W Md=3.2  EMSC   PUERTO RICO REGION

P: 12SEP2021 137027    18.0N   66.0W 3.4-5.4 AAAAA  Puerto Rico                

 

O: 11SEP2021 10:24:37  18.5N   68.8W ML=3.0  EMSC   DOMINICAN REPUBLIC           

P: 13SEP2021 137034    20.0N   68.0W 3.0-4.4 ABAAA  Bahamas/No. Caribbean      

 

O: 11SEP2021 09:22:41  18.5N   73.8W ML=3.6  EMSC   HAITI REGION                 

O: 12SEP2021 01:31:48  18.4N   73.4W ML=3.5  EMSC   HAITI REGION

O: 12SEP2021 06:47:08  18.6N   74.2W ML=3.8  EMSC   HAITI REGION

O: 11SEP2021 22:19:22  19.0N   73.8W ML=3.6  EMSC   HAITI REGION

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 BAAAA  Puerto Rico                

 

O: 11SEP2021 10:01:49  18.5S   71.5W mb=4.2  EMSC   OFF COAST OF TARAPACA, CHILE

O: 11SEP2021 10:11:21  18.5S   71.7W mb=4.3  EMSC   OFF COAST OF TARAPACA, CHILE

O: 11SEP2021 12:26:15  18.5S   71.5W mb=4.4  EMSC   OFF COAST OF TARAPACA, CHILE

O: 11SEP2021 16:41:21  18.5S   71.6W mb=4.2  EMSC   OFF COAST OF TARAPACA, CHILE 

P: 11SEP2021 137213    20.0S   71.0W 4.0-5.9 ABAAA  So. Peru/Bolivia           

 

O: 11SEP2021 09:20:17  23.6N  108.5W ML=4.1  EMSC   GULF OF CALIFORNIA           

P:  6SEP2021 136778    20.0N  109.0W 3.5-5.0 BCAAA  Gulf of California         

 

O: 11SEP2021 19:25:17  26.9S   65.7W ML=4.0  EMSC   TUCUMAN, ARGENTINA           

P: 17SEP2021 137204    27.0S   63.0W 4.0-5.4 CABAA  Argentina                  

 

O: 12SEP2021 01:54:25  31.7S   72.0W mb=4.1  EMSC   OFFSHORE COQUIMBO, CHILE     

P: 16SEP2021 137219    32.0S   72.0W 4.0-5.8 BAAAA  Central Chile              

 

AFRICA AND EUROPE

 

O: 12SEP2021 00:16:12  28.5N   17.8W ML=1.5  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 10SEP2021 136777    28.0N   16.0W 3.0-4.6 AAAAA  Canary Islands             

P: 12SEP2021 137036    28.0N   16.0W 3.0-4.5 AAAAA  Canary Islands             

 

O: 11SEP2021 13:31:01  36.4N   27.1E ML=4.3  EMSC   DODECANESE IS.-TURKEY BORDER R

P: 15SEP2021 137053    36.0N   27.0E 3.0-4.8 BAAAA  Aegean Sea                  

 

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

 

SOUTHWEST PACIFIC

 

O: 12SEP2021 02:57:41  12.5S  166.2E Mw=5.3  EMSC   SANTA CRUZ ISLANDS           

P: 10SEP2021 136933    14.0S  167.0E 4.0-5.5 ABAAA  Vanuatu Islands            

 

OCEAN RIDGES

 

O: 11SEP2021 10:55:57  38.1S   94.3W mb=4.4  EMSC   WEST CHILE RISE              

P: 12SEP2021 137226    37.0S   93.0W 4.0-5.4 ABAAA  Chile Rise                 

 

O: 11SEP2021 12:43:53  57.4S   26.1W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 11SEP2021 09:23:03  59.6S   26.4W Mw=5.5  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 11SEP2021 09:10:47  56.1S   27.9W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 AAAAA  So. Sandwich Islands       

 

O: 12SEP2021 03:58:21  62.3S   57.9W mb=4.8  EMSC   SOUTH SHETLAND ISLANDS       

P: 15SEP2021 137235    61.0S   58.0W 4.0-5.6 BBAAA  Southern  Ocean            

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 11SEP2021 14:58:50  33.8S  179.5E ML=4.0  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 18SEP2021 137222    35.0S  179.0E 3.0-4.4 CBAAA  North Island, N.Z.         

 

O: 11SEP2021 16:12:20  46.3S  166.3E ML=3.7  EMSC   OFF W. COAST OF S. ISLAND, N.Z

P: 13SEP2021 137231    45.0S  168.0E 3.0-4.9 ABBAA  So. Island, N.Z.           

 

JAPAN AND KURIL ISLANDS

 

O: 12SEP2021 05:32:02  29.9N  139.0E Mw=5.1  EMSC   IZU ISLANDS, JAPAN REGION    

P: 15SEP2021 137087    30.0N  141.0E 4.0-5.6 BABAA  Off East Coast Honshu      

 

O: 12SEP2021 02:17:05  33.1N  132.0E mb=4.5  EMSC   SHIKOKU, JAPAN               

P:  2SEP2021 136814    34.0N  132.0E 3.5-4.9 CAAAA  Kyushu, Japan area         

 

NEIC reported this earthquake of M 4.5 in Shikoku, Japan was felt with intensity II-III in the area(s) of Shikoku, Japan in Oita (V), Saiki and in Fukuoka.

 

O: 12SEP2021 02:32:25  47.2N  146.8E Mw=5.3  EMSC   NORTHWEST OF KURIL ISLANDS   

P: 11SEP2021 137146    47.0N  146.0E 3.5-5.4 AAAAA  So. Kurils                 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 11SEP2021 19:58:47  31.1N  114.7W ML=3.4  EMSC   GULF OF CALIFORNIA           

P: 14SEP2021 137038    30.0N  114.0W 3.5-4.9 BBAAA  Gulf of California         

 

O: 11SEP2021 21:57:35  31.4N  115.5W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO

O: 11SEP2021 09:33:21  31.4N  115.6W ML=3.6  EMSC   BAJA CALIFORNIA, MEXICO      

P: 12SEP2021 137092    31.9N  116.3W 2.5-4.8 AAAAA  So. California             

 

O: 11SEP2021 22:30:08  37.2N  117.4W ml=2.0  EMSC   NEVADA

O: 11SEP2021 22:24:06  37.2N  117.4W ml=2.2  EMSC   NEVADA                       

P: 11SEP2021 137059    37.4N  117.2W 2.5-4.9 AAAAA  California/Nevada area     

 

O: 11SEP2021 23:19:29  37.3N  121.4W Md=2.4  EMSC   NORTHERN CALIFORNIA          

P: 15SEP2021 137066    37.9N  122.0W 2.5-4.6 BAAAA  Central California         

 

O: 12SEP2021 03:41:21  38.5N  119.5W ml=2.1  EMSC   CENTRAL CALIFORNIA           

P: 17SEP2021 137062    38.3N  119.3W 2.5-4.6 BAAAA  California/Nevada area     

 

O: 11SEP2021 23:22:42  38.8N  122.8W Md=2.5  EMSC   NORTHERN CALIFORNIA          

P: 13SEP2021 137067    38.5N  122.7W 2.5-4.6 AAAAA  Central California         

 

O: 11SEP2021 09:13:03  39.2N  123.1W Md=2.1  EMSC   NORTHERN CALIFORNIA          

P:  7SEP2021 136807    39.0N  123.1W 2.5-4.4 BAAAA  Central California          

 

O: 11SEP2021 14:25:33  39.9N  123.5W Md=2.5  EMSC   NORTHERN CALIFORNIA

O: 11SEP2021 14:45:04  39.8N  123.5W Md=2.3  EMSC   NORTHERN CALIFORNIA          

P: 13SEP2021 137136    40.2N  124.2W 2.5-4.6 AAAAA  Off Coast of No. Calif     

 

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

 

ALASKA

 

O: 11SEP2021 16:20:54  61.5N  149.9W ML=3.6  EMSC   SOUTHERN ALASKA              

P: 14SEP2021 137176    60.1N  150.6W 3.2-5.3 BAAAA  Central Alaska             

 

O: 11SEP2021 18:37:53  63.0N  150.7W ML=3.2  EMSC   CENTRAL ALASKA               

P: 10SEP2021 136914    62.6N  151.4W 3.2-5.4 AAAAA  Central Alaska             

 

O: 11SEP2021 09:13:20  67.3N  156.2W ML=3.4  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: 11SEP2021 22:37:02  44.2N  115.1W ML=3.1  EMSC   SOUTHERN IDAHO               

P: 13SEP2021 137126    44.4N  115.1W 2.0-4.0 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O: 11SEP2021 12:08:51  34.9N   85.6W Md=2.3  EMSC   GEORGIA, USA                 

P: 12SEP2021 137075    35.0N   84.0W 2.0-4.1 AAAAA  Kentucky/Tennessee/NC      

 

O: 11SEP2021 12:51:40  28.6N  100.2W ML=2.9  EMSC   SOUTHERN TEXAS               

P:  1SEP2021 136785    29.0N   99.0W 3.0-4.9 CAAAA  Northern Mexico            

P: 15SEP2021 137046    28.0N   98.0W 3.0-4.8 BABAA  Northern Mexico            

 

O: 11SEP2021 18:14:37  36.7N   97.7W mb=2.5  EMSC   OKLAHOMA

O: 12SEP2021 00:56:04  35.1N   95.4W ML=2.1  EMSC   OKLAHOMA                     

P: 11SEP2021 137105    35.0N   96.0W 2.0-4.0 AAAAA  Southern Plains            

 

O: 11SEP2021 13:07:11  38.8N   97.0W mb=3.1  EMSC   KANSAS                       

P: 17SEP2021 137106    37.0N   98.0W 2.0-4.1 BBAAA  Southern Plains            

 

NEIC reported this earthquake of M 3.1 in Kansas was felt with intensity II-III in the area(s) of Kansas at Woodbine, Herington (IV), Manhattan, Ellsworth, Goddard.

 

HAWAII

 

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

 

MODERATE QUAKES IN INDIA, VANUATU AND ANDAMAN ISLANDS MARK QUIET DAY

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 10, 2021

 

It was a relatively quiet day in global seismicity. Earthquakes of M 5.2 occurred in the Andaman Islands of India and in Vanuatu. But neither of these were reported felt. The earthquake in Vanuatu is an aftershock of the M 7.1 ther of August 18, The M 5.2 in the Andaman Islands is the strongest in that region this year. The last earthquake in the Andaman Islands within about 250 km of today's epicenter with M>=5.2 occurred as an M 5.6 on May 22, 2019. The area can see great earthquakes so a resurgence in regional seismicity may be important to note. Forecast 136743 had expected today's activity in the Andaman Islands in early September. This epicenter is located at 144-146 degrees from both events

of M 7.1-7.2 in Mexico  of September 8 and in Haiti of August 14, 2021 and was probably promoted by energy from those sources.

 

O: 11SEP2021 03:20:20  14.0N   93.0E mb=5.2  EMSC   ANDAMAN ISLANDS, INDIA REGION

P:  5SEP2021 136743    13.0N   96.0E 4.0-5.8 CACAA  Andaman Islands            

 

O: 10SEP2021 17:45:21  14.6S  168.0E Mw=5.2  EMSC   VANUATU                      

P: 10SEP2021 136933    14.0S  167.0E 4.0-5.5 AAAAA  Vanuatu Islands            

 

The largest event felt in the world today was an M 4.7 in Uttaranchal,  India.

NEIC reported this earthquake of M 4.7 in Uttaranchal, India was felt with intensity IV-V in the area(s) of Uttaranchal, India in  Chamoli and Gopeshwan, Karnaprayang, Rudraprayag, Srinagar, Dev Prayag, Dwarahat, Ranikhet, Vithara, Dehra Dun and Naintal. The last earthquake of equal or larger magnitude in the Uttaranchal region of India within about 200 km occurred on December 1, 2016 with  5.2. A strong earthquake M 6.6 occurred in the area on March 28, 1999 and also with M 6.8 on October 19, 1991.  Forecast 136850 had expected today's activity to the east in early September.

 

O: 11SEP2021 00:28:32  30.5N   79.2E mb=4.7  EMSC   UTTARANCHAL, INDIA           

P:  4SEP2021 136850    30.0N   82.0E 3.8-5.2 CABAA  Xizang                     

 

The largest earthquake in the world today was an M 5.6 in the South Sandwich Islands – another in the series of moderately strong daily earthquakes in this aftershock sequence which follows the M 8.1 of August 12. Today's event, like others in the area was not reported felt in this remote region. Forecast 136964 had expected today's activity was likely within about 150 km around September 7-9.

 

O: 10SEP2021 17:07:17  60.4S   26.4W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 BBAAA  So. Sandwich Islands       

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 ACAAA  So. Sandwich Islands       

 

The strongest earthquake in the U.S. or Canada today was an M 4.1 in the Kenai Peninsula, Alaska. NEIC reported this earthquake of M 3.9 in the Kenai Peninsula, Alaska was felt with intensity II-III in the area(s) of the Kenai Peninsula, Alaska at Kasilof, Soldotna, Ninilchik, Sterling, Anchor Point, Kenai, Cooper Landng, Homer, Moose Pass, Anchorage. Three earthquakes of M>4.1 have occurred in the Kenai Peninsula area of Alaska in the past year - an M 4.7 on July 1, 2021; an M 4.4 on January 26, 2021 and an M 4.3 on July 19, 2021. Forecast 136912 had expected today's event within about 100 km was likely around September 8.

 

O: 11SEP2021 05:58:43  60.3N  151.3W Mw=4.1  EMSC   KENAI PENINSULA, ALASKA      

O: 11SEP2021 05:58:43  60.3N  151.3W Mw=4.9  ANSS   KENAI PENINSULA, ALASKA      

P:  8SEP2021 136912    61.3N  150.9W 3.2-5.3 BAAAA  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: 11SEP2021 00:28:32  30.5N   79.2E mb=4.7  EMSC   UTTARANCHAL, INDIA           

P:  4SEP2021 136850    30.0N   82.0E 3.8-5.2 CABAA  Xizang                     

 

O: 11SEP2021 01:34:06  37.5N   72.4E mb=4.0  EMSC   TAJIKISTAN                    

P:  8SEP2021 136812    37.0N   71.0E 3.8-5.4 BAAAA  Hindu Kush/Pakistan        

 

O: 10SEP2021 08:39:53  53.9N  160.4E mb=4.3  EMSC   NEAR EAST COAST OF KAMCHATKA 

P:  6SEP2021 136897    55.0N  160.0E 4.0-5.6 BBAAA  E. of Kamchatka            

 

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

 

INDONESIA AND PHILIPPINES

 

O: 11SEP2021 02:54:30   0.5N  126.3E mb=4.1  EMSC   MOLUCCA SEA

O: 11SEP2021 00:01:28   1.2N  126.7E ML=4.2  EMSC   MOLUCCA SEA

O: 10SEP2021 09:34:19   0.4N  125.0E ML=4.0  EMSC   MOLUCCA SEA                  

P:  5SEP2021 136719     0.0N  123.0E 4.0-5.5 BABAA  Mindanao, Philippines      

 

 

O: 10SEP2021 09:10:11   3.4S  140.8E ML=4.0  EMSC   PAPUA, INDONESIA

O: 10SEP2021 16:46:53   2.4S  140.3E ML=4.0  EMSC   NEAR N COAST OF PAPUA, INDONES

P:  6SEP2021 136736     3.0S  141.0E 4.0-5.4 BAAAA  Papua New Guinea           

 

O: 10SEP2021 15:33:20   2.9N  128.0E ML=4.0  EMSC   MOLUCCA SEA                  

P: 10SEP2021 136718     7.0N  127.0E 4.0-5.4 ACAAA  Halmahera                  

 

O: 10SEP2021 20:09:34   4.6S  153.3E mb=5.0  EMSC   NEW IRELAND REGION, P.N.G.   

P:  7SEP2021 136732     6.0S  154.0E 4.0-5.4 BBAAA  New Britain                

 

O: 11SEP2021 01:00:25   6.3N   94.7E ML=4.3  EMSC   NICOBAR ISLANDS, INDIA REGION

P:  6SEP2021 136721     7.0N   93.0E 4.0-5.8 BABAA  Nicobar Islands            

 

O: 11SEP2021 04:56:41   6.3S  151.0E mb=5.0  EMSC   NEW BRITAIN REGION, P.N.G.   

P:  3SEP2021 136733     7.0S  150.0E 4.0-5.5 CAAAA  New Ireland                 

 

O: 10SEP2021 19:24:37  10.2S  116.1E mb=4.4  EMSC   SOUTH OF LOMBOK, INDONESIA   

P:  7SEP2021 136931    11.0S  116.0E 4.0-5.6 BAAAA  So. of Indonesia           

 

O: 11SEP2021 03:20:20  14.0N   93.0E mb=5.2  EMSC   ANDAMAN ISLANDS, INDIA REGION

P:  5SEP2021 136743    13.0N   96.0E 4.0-5.8 CACAA  Andaman Islands            

 

 

CENTRAL AND SOUTH AMERICA

 

O: 11SEP2021 02:36:30   7.4N   82.8W ML=4.3  EMSC   SOUTH OF PANAMA              

P:  7SEP2021 136717     7.0N   82.0W 3.5-5.3 BAAAA  Costa Rica                  

 

O: 11SEP2021 06:06:08   9.3N   82.7W ML=4.3  EMSC   PANAMA-COSTA RICA BORDER REGIO

P:  8SEP2021 136717     9.0N   84.0W 3.5-5.1 BAAAA  Costa Rica                 

 

O: 11SEP2021 06:52:14  11.0S   79.2W ML=4.2  EMSC   OFF COAST OF CENTRAL PERU    

P:  7SEP2021 136735     9.0S   80.0W 4.0-5.6 BBAAA  No. Peru                   

 

O: 10SEP2021 08:58:14  13.7N   90.6W mb=4.0  EMSC   OFFSHORE GUATEMALA           

P:  7SEP2021 136751    14.0N   90.0W 3.5-5.3 BAAAA  Guatemala                  

 

O: 11SEP2021 06:26:57  15.4N   96.9W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P:  5SEP2021 136766    16.0N   97.0W 3.5-5.3 CAAAA  Oaxaca, Mexico             

 

O: 11SEP2021 02:34:08  15.7N   92.4W ML=4.0  EMSC   CHIAPAS, MEXICO              

P:  9SEP2021 136751    14.0N   92.0W 3.5-5.3 ABAAA  Guatemala                  

 

O: 11SEP2021 00:58:45  16.5N   98.4W ML=4.0  EMSC   GUERRERO, MEXICO             

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 BBBAA  Oaxaca, Mexico             

 

O: 10SEP2021 18:13:58  16.6N  100.6W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO    

P:  8SEP2021 136759    17.0N  101.0W 3.5-5.3 AAAAA  Michoacan, Mexico          

 

O: 10SEP2021 13:49:04  18.0N   66.9W Md=3.0  EMSC   PUERTO RICO REGION           

P:  8SEP2021 136769    19.0N   66.0W 3.4-5.4 AAAAA  Puerto Rico                

 

O: 10SEP2021 21:07:08  24.1S   67.2W mb=4.6  EMSC   SALTA, ARGENTINA             

P:  6SEP2021 136936    22.0S   69.0W 4.0-5.6 BCBAA  Coast No. Chile            

 

O: 10SEP2021 09:48:16  18.5N   73.5W ML=3.3  EMSC   HAITI REGION

O: 10SEP2021 11:31:59  18.8N   74.0W ML=3.4  EMSC   HAITI REGION

O: 10SEP2021 11:43:23  18.8N   74.0W ML=3.3  EMSC   HAITI REGION

O: 10SEP2021 08:29:41  18.4N   73.9W ML=3.4  EMSC   HAITI REGION                 

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 AABAA  Puerto Rico                

 

AFRICA AND EUROPE

 

O: 10SEP2021 17:31:14  45.6N   26.4E mb=3.8  EMSC   ROMANIA                      

P:  5SEP2021 136881    46.0N   27.0E 3.0-4.9 BAAAA  Romania/NW Turkey          

 

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

 

SOUTHWEST PACIFIC

 

O: 10SEP2021 17:45:21  14.6S  168.0E Mw=5.2  EMSC   VANUATU                      

P: 10SEP2021 136933    14.0S  167.0E 4.0-5.5 AAAAA  Vanuatu Islands            

 

OCEAN RIDGES

 

O: 10SEP2021 17:07:17  60.4S   26.4W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 BBAAA  So. Sandwich Islands       

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 ACAAA  So. Sandwich Islands        

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 10SEP2021 17:58:48  37.5S  179.4E ML=4.0  EMSC   OFF E. COAST OF N. ISLAND, N.Z

O: 10SEP2021 17:58:48  37.5S  179.4E ML=4.0  GEONET Not Felt

P:  8SEP2021 136953    37.0S  178.0E 3.0-4.6 AAAAA  North Island, N.Z.          

 

O: 10SEP2021 18:00:58  45.1S  167.5E ML=3.6  EMSC   SOUTH ISLAND OF NEW ZEALAND  

P:  9SEP2021 136960    44.0S  169.0E 3.0-4.9 ABAAA  So. Island, N.Z.           

 

JAPAN AND KURIL ISLANDS

 

O: 10SEP2021 13:42:48  41.0N  142.5E mb=4.2  EMSC   HOKKAIDO, JAPAN REGION       

P:  8SEP2021 136856    42.0N  143.0E 3.5-5.5 AAAAA  Hokkaido, Japan            

 

O: 10SEP2021 20:00:51  45.5N  151.8E mb=4.8  EMSC   KURIL ISLANDS                

O: 10SEP2021 20:10:41  45.7N  151.7E mb=4.9  EMSC   KURIL ISLANDS                

P:  5SEP2021 136883    47.0N  153.0E 3.5-5.6 BBAAA  So. Kurils                 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 10SEP2021 09:45:44  30.7N  116.0W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO      

O: 10SEP2021 07:25:16  31.0N  115.5W ML=3.0  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    31.3N  116.3W 2.5-4.8 BAAAA  So. California             

 

O: 10SEP2021 11:19:36  32.5N  115.4W ML=2.4  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    32.6N  116.1W 2.5-4.9 BAAAA  So. California             

P:  8SEP2021 136831    33.0N  115.9W 2.5-5.0 AAAAA  So. California             

 

NEIC reported this earthquake of M 2.5 in Baja California, Mexico was felt with intensity II-III in the area(s) of Baja California, Mexico in Mexicali, Mexico.

 

O: 10SEP2021 17:29:40  33.8N  117.5W Ml=2.1  EMSC   GREATER LOS ANGELES AREA, CALI

P:  6SEP2021 136833    33.7N  117.5W 2.5-4.6 BAAAA  So. California             

 

O: 10SEP2021 12:10:18  34.0N  119.9W Ml=2.2  EMSC   CHANNEL ISLANDS REG., CALIFORN

P:  6SEP2021 136834    33.8N  119.7W 2.5-4.6 BAAAA  So. California             

 

O: 11SEP2021 01:17:44  34.1N  117.8W ML=2.5  EMSC   GREATER LOS ANGELES AREA, CALI

P: 10SEP2021 136834    34.0N  118.7W 2.5-4.6 AAAAA  So. California             

 

O: 11SEP2021 00:57:31  36.6N  121.2W Md=2.3  EMSC   CENTRAL CALIFORNIA

O: 10SEP2021 21:47:15  36.9N  121.6W Md=2.2  EMSC   NORTHERN CALIFORNIA

O: 10SEP2021 22:49:32  36.3N  120.9W Md=2.0  EMSC   CENTRAL CALIFORNIA           

O: 10SEP2021 14:59:09  36.6N  121.3W Md=2.4  EMSC   CENTRAL CALIFORNIA           

P:  9SEP2021 136802    36.6N  120.7W 2.5-4.5 AAAAA  Central California         

 

O: 11SEP2021 04:54:23  37.9N  118.6W ml=2.4  EMSC   CENTRAL CALIFORNIA           

P: 10SEP2021 136800    38.2N  118.8W 2.5-4.4 AAAAA  California/Nevada area     

 

NEIC reported this earthquake of M 3.4 in Western Nevada was felt with intensity II-III in the area(s) of Western Nevada at Carson City and Glenbrook.

 

O: 10SEP2021 10:33:02  38.5N  119.5W Md=2.0  EMSC   CENTRAL CALIFORNIA           

P:  4SEP2021 136801    38.3N  119.3W 2.5-4.5 CAAAA  California/Nevada area     

 

O: 10SEP2021 08:19:41  38.7N  122.9W Md=2.5  EMSC   NORTHERN CALIFORNIA          

P:  7SEP2021 136807    39.0N  123.1W 2.5-4.4 BAAAA  Central California         

 

O: 11SEP2021 03:00:16  40.4N  124.6W Md=2.4  EMSC   OFFSHORE NORTHERN CALIFORNIA

O: 10SEP2021 17:06:33  40.3N  124.3W Md=2.2  EMSC   NORTHERN CALIFORNIA          

P:  8SEP2021 136873    40.7N  124.6W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

ALASKA

 

O: 10SEP2021 14:00:03  51.5N  175.4W mb=3.8  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P:  9SEP2021 136895    51.9N  174.0W 3.5-5.1 AAAAA  Andreanoff Isls, Aleutians 

 

O: 10SEP2021 09:15:16  53.4N  163.5W ml=3.7  EMSC   UNIMAK ISLAND REGION, ALASKA

O: 10SEP2021 07:40:34  53.5N  163.7W ML=3.3  EMSC   UNIMAK ISLAND REGION, ALASKA

O: 10SEP2021 09:15:16  53.4N  163.5W ml=3.7  EMSC   UNIMAK ISLAND REGION, ALASKA 

P:  6SEP2021 136908    54.0N  164.9W 3.5-5.1 BAAAA  Unimak Islands, Aleutians  

 

O: 10SEP2021 09:21:06  54.7N  156.9W ml=3.2  EMSC   SOUTH OF ALASKA              

P:  6SEP2021 136890    54.7N  157.9W 3.5-5.1 BAAAA  Alaska Peninsula           

 

O: 10SEP2021 14:58:57  56.6N  156.9W ML=3.4  EMSC   ALASKA PENINSULA              

P:  6SEP2021 136890    54.7N  157.9W 3.5-5.1 BBAAA  Alaska Peninsula           

 

O: 10SEP2021 07:52:09  60.1N  140.2W ML=3.0  EMSC   SOUTHERN YUKON TERRITORY, CANA

P:  5SEP2021 136907    59.0N  139.0W 3.0-4.6 BBAAA  Southeast Alaska           

 

O: 11SEP2021 05:58:43  60.3N  151.3W Mw=4.1  EMSC   KENAI PENINSULA, ALASKA      

P:  8SEP2021 136912    61.3N  150.9W 3.2-5.3 BAAAA  Central Alaska             

 

O: 11SEP2021 05:58:27  68.3N  158.2W ml=3.4  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: 10SEP2021 14:12:41  31.6N  104.2W ML=2.5  EMSC   WESTERN TEXAS

O: 10SEP2021 17:57:58  31.6N  104.2W ML=2.5  EMSC   WESTERN TEXAS

O: 10SEP2021 10:29:42  31.7N  104.4W ML=2.3  EMSC   WESTERN TEXAS

O: 10SEP2021 11:34:35  31.7N  104.4W ML=3.1  EMSC   WESTERN TEXAS

O: 10SEP2021 14:35:38  31.7N  104.5W ML=2.0  EMSC   WESTERN TEXAS

O: 10SEP2021 17:17:24  31.7N  104.5W ML=2.6  EMSC   WESTERN TEXAS

O: 10SEP2021 11:51:13  32.1N  103.9W ML=2.3  EMSC   NEW MEXICO

O: 10SEP2021 11:54:24  31.6N  104.1W ML=2.1  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 BAAAA  SW U.S.A                   

 

O: 10SEP2021 17:37:50  44.3N  115.0W ML=3.1  EMSC   SOUTHERN IDAHO

O: 10SEP2021 22:30:41  44.3N  115.1W ML=3.2  EMSC   SOUTHERN IDAHO

O: 10SEP2021 23:06:26  44.3N  115.2W ML=3.3  EMSC   SOUTHERN IDAHO

O: 10SEP2021 16:18:09  44.3N  115.0W Ml=2.2  EMSC   SOUTHERN IDAHO               

P:  7SEP2021 136862    44.4N  115.2W 2.0-4.0 BAAAA  Montana/Idaho              

P: 10SEP2021 136863    44.6N  116.0W 2.0-4.0 AAAAA  Montana/Idaho              

 

NEIC reported these earthquakes of M 3.1, 3.2 and 3.3 in Southern Idaho were felt with intensity II-III in the area(s) of Southern Idaho in Stanley and Ketchum.

 

EASTERN U.S./CANADA

 

O: 10SEP2021 08:22:30  72.0N   75.1W ML=3.4  EMSC   BAFFIN ISLAND REGION, CANADA 

 

HAWAII

 

O: 11SEP2021 03:22:30  19.2N  155.5W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P:  3SEP2021 136779    19.3N  155.6W 4.0-5.7 CAAAA  Hawaii area                

P: 10SEP2021 136779    20.4N  155.1W 4.0-5.6 ABAAA  Hawaii area                

 

MODERATE EARTHQUAKE ROCKS GUADELOUPE, LEEWARD ISLANDS

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 9, 2021

 

An M 5.0 was felt widely in the Guadeloupe area of the Leeward Islands today. NEIC reported it was felt with maximum intensity IV in Guadeloupe at Anse-Bertrand Grande-Terre and Les Abymes with intensity II-III in Guatdeloup at Le Moule, Sante-Anne, Le Gosier, Point-a-Pitre, Baie-Mahault and Lamentin Basse-Terre and in Antigua and Barbuda at English Harbour Saint Paul and All Saints Saint John. The only earthquake of larger magnitude in Guadeloupe in the past year was an M 5.8 on March 26, 2021 and today's event may be an aftershock of that. Forecast 136753 had expected today's activity was likely within about  100 km of the epicenter in early September.

 

O: 10SEP2021 00:43:19  16.8N   61.2W mb=5.0  EMSC   GUADELOUPE REGION, LEEWARD ISL

P:  4SEP2021 136753    17.0N   60.0W 3.0-5.0 CAAAA  Leeward Islands            

 

An M 4.3 off the coast of Northern California today was widely felt in Northern California with intensity II-III in Petrolia, Ferndale, Fortuna, Whitethorn, Loleta,m Eureka, Aracata, Petaluma and Earlmart. This is the strongest earthquake off the coast of northern California within about 150 km of this epicenter since an M 5.1 on July 18 and an M 4.4 aftershock on July 21, 2021.  Forecast 136873 had expected today's event within about 50 km of this epicenter was likely around September 8. The mainshock occurred within about an hour of local solar noon and may have been promoted by strong tidal stresses which maximize near this hour with this new moon as noted in this and previous issues of this summary:

 

"The new moon arrived at 00:52 UT on September 7, 2021. Longitudes which were near local solar midnight at this time are in the Atlantic Ocean and western Europe near 15 West and include areas of the Central Mid-Atlantic and the South Sandwich Islands while those at local solar noon are near 165 East and include areas of the northern Kurils and the Sea of Okhotsk, Near Islands and western Aleutians as well as the Vanuatu/Loyalty Islands, Kermadec-Tonga-Fiji-New Zealand arc. These areas will see maximum tidal stresses with this new moon and are most likely to see enhanced seismicity in the next week." (September 6-9, 2021)

 

O:  9SEP2021 21:57:52  40.3N  124.7W Mw=4.3  EMSC   OFFSHORE NORTHERN CALIFORNIA 

O: 10SEP2021 00:03:53  40.3N  124.4W Md=2.2  EMSC   OFFSHORE NORTHERN CALIFORNIA

P:  8SEP2021 136873    40.7N  124.6W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

 

The strongest earthquake in the U.S. or Canada today was an M 5.1 in the Unimak Island Region, Aleutians, Alaska. It was not reported felt in this remote area. The only earthquakes of M>=5 in the Unimak Islands in the past year were an M 5.1 on January 11, 2021 and an M 5.0 on November 4, 2020. Both occurred about 100 km west of today's epicenter. Forecast 136908 had expected today's activity was likely in early September within about 100 km of today's epicenters. Like the M 5.1 in the West Chile Rise today this epicenter is located at the sixth node (60 degrees) from the epicenter of the M 7.1 in Mexico two days ago and may have been promoted by energy from that source.

 

O:  9SEP2021 19:23:26  53.6N  163.6W mb=5.1  EMSC   UNIMAK ISLAND REGION, ALASKA 

O: 10SEP2021 05:57:54  53.2N  163.4W mb=4.0  EMSC   UNIMAK ISLAND REGION, ALASKA

P:  2SEP2021 136908    54.6N  163.6W 3.5-5.0 CAAAA  Unimak Islands, Aleutians  

P:  6SEP2021 136908    54.0N  164.9W 3.5-5.1 BAAAA  Unimak Islands, Aleutians  

 

A light earthquake of M 2.4-2.8 occurred today in the St. Lawrence Valley area of Quebec, Canada. ECAN reported it was lightly felt in the Lake Pocatiere region. The only event in this region in the past year within about 200 km of this epicenter with greater magnitude was an M 3.4 on December 28, 2020. Forecast 136860 had expected today's event within about 50 km was likely around September 9.

 

O: 09SEP2021 13:37:56  47.4N   70.2W MB=2.8  ECAN La Pocatiere, QC. Felt  

O: 08SEP2021 12:05:42  47.4N   70.4W MB=0.9  ECAN Charlevoix Seismic Zone     

O:  9SEP2021 13:37:55  47.4N   70.2W ML=2.4  EMSC   ST. LAWRENCE VALLEY REG., CANA

P:  9SEP2021 136860    47.0N   70.0W 2.0-4.1 AAAAA  Maine                      

 

Moderate earthquakes also continued in the series in the West Chile Rise which began shortly after the M 7.1 in Mexico of September 8. The largest of these today was also the largest event in the world on this day - an M 5.1 south of the previous swarm. It was not reported felt in this remote area. Like the M 5.0 in the Unimak Islands area of Alaska today located at 60 degrees (node 6) from the Mexico event and was probably promoted by energy from that source. Forecast 136956 had expected this event was likely within about 50 km of this epicenter around September 9. This event occurred within about an hour of local solar midnight and may have been  promoted by high earth tides which maximize near this hour.

 

O: 10SEP2021 04:21:29  42.8S   83.7W mb=5.1  EMSC   WEST CHILE RISE              

P:  9SEP2021 136956    43.0S   83.0W 4.0-5.5 AAAAA  Chile Rise                  

 

Earthquakes also continued to the north of this near the previous swarm.

When this swarm began two days ago, this summary noted in this regard:

 

"A strong series of events also hit the West Chile Rise in the Pacific Ocean today and included events of M 5.6, 5.4, 5.3 and 5.2. The largest of these occurred near local solar noon and may have been promoted by tidal effects with the new moon, but energy from the M 7.0 in Mexico may also have enhanced this activity. This is the strongest activity within about 200 km on the West Chile Rise in more than 10 years - following an M 5.9 about 200 km southeast of this on  May 20, 2010 and an M 6.0 to the east on June 5, 2008. Forecast 136956 had expected today's activity was likely to the southeast in the Chile Rise around September 7. This activity is at the sixth node from the M 7.2 in Haiti of August 14 and may have been promoted by energy from that source." (September 8-9, 2021)

 

 

O: 09SEP2021 16:27:22  38.0S   94.0W mb=4.6  EMSC   WEST CHILE RISE

O:  9SEP2021 11:52:31  38.0S   94.1W mb=4.5  EMSC   WEST CHILE RISE              

P:  7SEP2021 136956    41.0S   91.0W 4.0-5.6 ACBAA  Chile Rise                 

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: 10SEP2021 05:45:02  23.9N  122.1E mb=4.7  EMSC   TAIWAN REGION                

O: 10SEP2021 05:45:04  23.9N  122.1E ML=4.8  TAI    Hualien, Taiwan              

P: 10SEP2021 136791    22.0N  122.0E 4.0-5.4 ABAAA  Taiwan                     

 

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

 

O: 10SEP2021 05:22:40  36.6N   70.9E mb=4.4  EMSC   HINDU KUSH REGION, AFGHANISTAN

O: 09SEP2021 23:43:15  36.8N   71.2E mb=4.5  EMSC   HINDU KUSH REGION, AFGHANISTAN

P:  8SEP2021 136812    37.0N   71.0E 3.8-5.4 AAAAA  Hindu Kush/Pakistan        

 

O:  9SEP2021 23:48:35  37.6N   80.9E mb=4.5  EMSC   SOUTHERN XINJIANG, CHINA     

P:  7SEP2021 136859    42.0N   82.0E 4.0-5.8 ACAAA  Kirgizstan/Xinjiang        

 

O: 10SEP2021 00:24:46  53.1N   99.0E mb=4.2  EMSC   IRKUTSKAYA OBLAST', RUSSIA   

P: 31AUG2021 136641    51.0N   98.0E 3.0-4.4 CBAAA  So. Siberia                

 

INDONESIA AND PHILIPPINES

 

O:  9SEP2021 15:22:58   3.9S  135.0E ML=4.3  EMSC   PAPUA, INDONESIA             

P: 31AUG2021 136467     4.0S  135.0E 4.0-5.4 CAAAA  West Irian, PNG             

 

O: 10SEP2021 01:42:21   4.6S  101.7E mb=4.4  EMSC   SOUTHERN SUMATRA, INDONESIA  

P: 10SEP2021 136739     2.0S  101.0E 4.0-5.6 ACAAA  So. of Sumatera            

 

O:  9SEP2021 15:18:00   5.4N  126.7E ML=4.3  EMSC   MINDANAO, PHILIPPINES         

P: 10SEP2021 136718     7.0N  127.0E 4.0-5.4 ABAAA  Halmahera                  

 

O:  9SEP2021 12:49:37   9.1S  123.3E ML=4.2  EMSC   TIMOR REGION, INDONESIA      

P:  9SEP2021 136729     7.0S  123.0E 4.0-5.4 ABAAA  Flores Island area         

 

O:  9SEP2021 17:23:32  13.8N  144.9E mb=4.5  EMSC   GUAM REGION                  

P:  9SEP2021 136772    13.0N  144.0E 4.0-5.4 AAAAA  So. Marianas/Guam          

 

NEIC reported this earthquake of M 4.5 in Guam was felt with intensity II-III in the area(s) of Guam at Tamuning, Talofofo and Merizo.

 

CENTRAL AND SOUTH AMERICA

 

O:  9SEP2021 17:58:25   9.8S   79.8W mb=4.7  EMSC   OFF COAST OF NORTHERN PERU   

P:  7SEP2021 136735     9.0S   80.0W 4.0-5.6 AAAAA  No. Peru                   

 

O: 10SEP2021 00:27:06  15.5N   96.8W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P:  7SEP2021 136747    16.0N   95.0W 3.5-5.1 BABAA  Chiapas, Mexico            

 

O: 09SEP2021 10:56:22  16.8N   99.7W ML=4.2  EMSC   GUERRERO, MEXICO

O: 09SEP2021 15:35:31  16.8N   99.8W ML=4.0  EMSC   GUERRERO, MEXICO

O: 09SEP2021 19:52:36  16.8N   99.9W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO

O: 10SEP2021 04:04:33  16.7N  100.0W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO    

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 BAAAA  Oaxaca, Mexico              

P:  8SEP2021 136759    17.0N  101.0W 3.5-5.3 AAAAA  Michoacan, Mexico          

 

O: 10SEP2021 00:43:19  16.8N   61.2W mb=5.0  EMSC   GUADELOUPE REGION, LEEWARD ISL

P:  4SEP2021 136753    17.0N   60.0W 3.0-5.0 CAAAA  Leeward Islands            

 

O: 09SEP2021 22:31:53  18.0N   66.2W Md=3.1  EMSC   PUERTO RICO

O:  9SEP2021 08:52:14  18.0N   66.9W Md=3.0  EMSC   PUERTO RICO                  

P:  8SEP2021 136769    19.0N   66.0W 3.4-5.4 AAAAA  Puerto Rico                

 

O: 10SEP2021 03:25:38  18.2S   69.9W mb=4.6  EMSC   SOUTHERN PERU                

O: 10SEP2021 03:25     18.2S   70.0W mb=4.4  GUC    Arica and Parinacotga at Arica

P:  8SEP2021 136930    19.0S   69.0W 4.0-5.7 AAAAA  So. Peru/Bolivia           

 

GUC reported this earthquake was felt with intensity  III in  Arica and Parinacotga at Arica, Pocon Chile, Putre, San Miguel de Azapa and II in Codpa, Chile,

 

 

O:  9SEP2021 07:38:49  18.5N   73.7W ML=3.3  EMSC   HAITI REGION                 

O: 09SEP2021 07:45:22  18.6N   74.1W ML=3.5  EMSC   HAITI REGION

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 AAAAA  Puerto Rico                

 

O:  9SEP2021 16:10:01  19.2N   64.6W Md=3.6  EMSC   VIRGIN ISLANDS REGION        

P:  8SEP2021 136753    19.0N   65.0W 3.0-5.4 AAAAA  Leeward Islands             

 

O: 10SEP2021 05:45:56  20.6S   69.3W mb=4.0  EMSC   TARAPACA, CHILE              

P:  6SEP2021 136935    21.0S   68.0W 4.0-5.8 BAAAA  Argentina                  

 

NEIC reported this earthquake of M 4.0 in Tarapaca, Chile was felt with intensity II-III in the area(s) of Tarapaca, Chile at Iquique.

 

 

O:  9SEP2021 19:59:48  21.7N  101.1W ML=3.9  EMSC   GUANAJUATO, MEXICO           

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 ACAAA  Oaxaca, Mexico             

 

 

AFRICA AND EUROPE

 

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

 

SOUTHWEST PACIFIC

 

O:  9SEP2021 21:56:46  17.7S  178.7W mb=4.5  EMSC   FIJI REGION                  

P:  8SEP2021 136932    18.0S  178.0W 4.0-5.8 AAAAA  Tonga Islands              

 

O:  9SEP2021 11:22:17  20.0S  178.1W mb=4.1  EMSC   FIJI REGION                  

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 AACAA  Tonga Islands              

 

O:  9SEP2021 07:18:09  21.8S  179.3W Mw=5.3  EMSC   FIJI REGION                  

P:  9SEP2021 136945    25.0S  180.0W 4.0-5.4 ACAAA  Tonga Islands              

 

O: 10SEP2021 00:19:57  25.9S  179.4W mb=5.0  EMSC   SOUTH OF FIJI ISLANDS        

P:  9SEP2021 136945    25.0S  180.0W 4.0-5.4 AAAAA  Tonga Islands              

 

O: 10SEP2021 00:21:00  26.2S  178.4E mb=4.7  EMSC   SOUTH OF FIJI ISLANDS        

P:  7SEP2021 136946    25.0S  179.0E 4.0-5.4 BBAAA  Tonga/Fiji                 

 

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

 

OCEAN RIDGES

 

O: 09SEP2021 16:27:22  38.0S   94.0W mb=4.6  EMSC   WEST CHILE RISE

O:  9SEP2021 11:52:31  38.0S   94.1W mb=4.5  EMSC   WEST CHILE RISE              

P:  7SEP2021 136956    41.0S   91.0W 4.0-5.6 ACBAA  Chile Rise                 

 

O: 10SEP2021 04:21:29  42.8S   83.7W mb=5.1  EMSC   WEST CHILE RISE              

P:  9SEP2021 136956    43.0S   83.0W 4.0-5.5 AAAAA  Chile Rise                 

 

O:  9SEP2021 12:59:01  59.4S   25.4W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 ACAAA  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: 10SEP2021 02:01:25  26.1N  128.6E mb=4.7  EMSC   RYUKYU ISLANDS, JAPAN        

P:  8SEP2021 136788    26.0N  126.0E 4.0-5.5 AABAA  Ryukyu Islands             

 

O: 10SEP2021 02:10:26  31.0N  139.7E mb=4.3  EMSC   IZU ISLANDS, JAPAN REGION    

P:  6SEP2021 136824    33.0N  141.0E 4.0-5.6 BBAAA  Off East Coast Honshu      

 

O:  9SEP2021 20:49:27  42.9N  143.4E mb=4.0  EMSC   HOKKAIDO, JAPAN REGION       

P:  8SEP2021 136856    42.0N  143.0E 3.5-5.5 AAAAA  Hokkaido, Japan            

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  9SEP2021 09:12:09  31.9N  115.9W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    31.3N  116.3W 2.5-4.8 AAAAA  So. California             

 

O:  9SEP2021 15:01:24  34.1N  117.4W ML=2.5  EMSC   GREATER LOS ANGELES AREA, CALI

P:  6SEP2021 136833    33.7N  117.5W 2.5-4.6 BAAAA  So. California             

 

NEIC reported this earthquake of M 2.6 in Eastern Los Angeles, California was felt with intensity II-III in the area(s) of Eastern Los Angeles, California at Fontana, Rialto, Rancho Cucamonga, San Bernardno, Riverside, Chino and Los Angeles.

 

O: 10SEP2021 00:06:12  35.7N  117.5W Ml=2.3  EMSC   SOUTHERN CALIFORNIA          

P:  9SEP2021 136796    36.1N  118.1W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 09SEP2021 14:29:33  38.6N  119.4W ml=2.4  EMSC   CENTRAL CALIFORNIA

O: 09SEP2021 14:37:21  38.6N  119.4W ml=2.3  EMSC   CENTRAL CALIFORNIA

O: 09SEP2021 16:22:04  38.6N  119.4W ml=2.1  EMSC   CENTRAL CALIFORNIA

O: 10SEP2021 02:29:58  38.6N  119.4W Md=2.2  EMSC   CENTRAL CALIFORNIA

O:  9SEP2021 14:27:53  38.6N  119.4W ML=3.1  EMSC   CENTRAL CALIFORNIA           

O:  9SEP2021 14:27:53  38.6N  119.4W ML=3.3  ANSS   CENTRAL CALIFORNIA           

P:  4SEP2021 136801    38.3N  119.3W 2.5-4.5 BAAAA  California/Nevada area      

 

NEIC reported this earthquake of M 3.3 in Central California was felt with intensity II-III in the area(s) of Central California at Coleville and in Glenbrook, Nevada.

 

O:  9SEP2021 16:42:19  38.8N  122.8W Md=2.4  EMSC   NORTHERN CALIFORNIA           

P:  7SEP2021 136807    39.0N  123.1W 2.5-4.4 AAAAA  Central California         

 

O:  9SEP2021 21:57:52  40.3N  124.7W Mw=4.3  EMSC   OFFSHORE NORTHERN CALIFORNIA 

O: 10SEP2021 00:03:53  40.3N  124.4W Md=2.2  EMSC   OFFSHORE NORTHERN CALIFORNIA

P:  8SEP2021 136873    40.7N  124.6W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

 

ALASKA

 

O:  9SEP2021 23:44:02  51.7N  175.1W ML=3.6  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P:  9SEP2021 136894    51.3N  176.8W 3.5-5.0 AAAAA  Andreanoff Isls, Aleutians 

 

O:  9SEP2021 19:23:26  53.6N  163.6W mb=5.1  EMSC   UNIMAK ISLAND REGION, ALASKA 

O: 10SEP2021 05:57:54  53.2N  163.4W mb=4.0  EMSC   UNIMAK ISLAND REGION, ALASKA

P:  2SEP2021 136908    54.6N  163.6W 3.5-5.0 CAAAA  Unimak Islands, Aleutians  

P:  6SEP2021 136908    54.0N  164.9W 3.5-5.1 BAAAA  Unimak Islands, Aleutians  

 

O:  9SEP2021 10:19:00  58.0N  156.3W ML=3.1  EMSC   ALASKA PENINSULA             

P:  7SEP2021 136912    60.1N  153.4W 3.2-5.2 ACBAA  Central Alaska             

 

O:  9SEP2021 07:33:14  60.1N  140.2W ML=3.0  EMSC   SOUTHERN YUKON TERRITORY, CANA

P:  5SEP2021 136907    59.0N  139.0W 3.0-4.6 BBAAA  Southeast Alaska           

 

O: 10SEP2021 05:31:49  60.3N  151.8W ML=3.5  EMSC   KENAI PENINSULA, ALASKA      

P:  8SEP2021 136912    61.3N  150.9W 3.2-5.3 AAAAA  Central Alaska             

 

O: 10SEP2021 01:26:42  61.6N  146.5W ML=3.5  EMSC   SOUTHERN ALASKA              

P:  4SEP2021 136913    61.4N  146.5W 3.2-4.9 CAAAA  Central Alaska             

 

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 09SEP2021 21:41:54  44.1N  128.7W ML=3.2  EMSC   OFF COAST OF OREGON

O:  9SEP2021 18:58:03  43.6N  128.0W ML=2.8  EMSC   OFF COAST OF OREGON          

P:  6SEP2021 136875    44.4N  129.3W 3.0-4.8 BAAAA  Off Coast of Oregon        

P:  7SEP2021 136874    41.8N  126.9W 2.5-4.8 ABAAA  Off Coast of No. Calif     

 

O:  9SEP2021 22:52:28  48.0N  122.1W Md=2.4  EMSC   SEATTLE-TACOMA AREA, WASHINGTO

P:  5SEP2021 136888    48.0N  123.0W 2.0-4.4 BAAAA  Washington state, U.S.     

P:  7SEP2021 136888    49.0N  123.0W 2.0-4.4 AAAAA  Washington state, U.S.     

 

ROCKY MOUNTAINS REGION

 

O:  9SEP2021 14:47:54  31.9N  103.4W mb=2.5  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 BAAAA  SW U.S.A                   

 

O: 09SEP2021 19:19:28  44.2N  114.3W Ml=2.4  EMSC   SOUTHERN IDAHO

O:  9SEP2021 17:02:36  44.3N  115.2W Ml=2.1  EMSC   SOUTHERN IDAHO               

P:  7SEP2021 136862    44.4N  115.2W 2.0-4.0 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O: 09SEP2021 13:37:56  47.4N   70.2W MB=2.8  ECAN La Pocatiere, QC. Felt  

O: 08SEP2021 12:05:42  47.4N   70.4W MB=0.9  ECAN Charlevoix Seismic Zone     

O:  9SEP2021 13:37:55  47.4N   70.2W ML=2.4  EMSC   ST. LAWRENCE VALLEY REG., CANA

P:  9SEP2021 136860    47.0N   70.0W 2.0-4.1 AAAAA  Maine                      

 

O: 10SEP2021 08:22:30  72.0N   75.1W MB=3.4  ECAN Pond Inlet, NU                 

 

O:  9SEP2021 21:33:14  48.3N   69.3W MB=2.0  ECAN Les Escoumins, QC              

P:  9SEP2021 136860    47.0N   70.0W 2.0-4.1 ABAAA  Maine                      

 

O:  9SEP2021 21:22:14  49.6N   67.0W MB=1.5  ECAN Port-Cartier, QC               

P:  9SEP2021 136860    47.0N   70.0W 2.0-4.1 ACBAA  Maine                      

 

HAWAII

 

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

 

STRONG EARTHQUAKE IN MEXICO OCCURS ON 4TH ANNIVERSARY OF MEXICO M 8.1 SEPT 8, 2017

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 8, 2021

 

Aftershocks of the M 7.0-7.1 earthquake in the Guerrero area of Mexico of September 8, 2021 continued today. An interesting phenomenon was observed with the mainshock. Strong earthquake lights accompanied the event and were recorded as far as Mexico City. Some of these recordings can be viewed on the web. The cause of earthquake lights is not known but many hypotheses have been proposed but the relation with strong geomagnetic storms and accompanying aurora is especially in the current situation as such a storm within an hour or two of the time of the M 7.0 in Mexico today. Videos of the lights appeared similar to aurora and to heat lightning. The blue lights followed the earthquake and were viewed with alarm by local citizens. Such lights often accompany major earthquakes in subduction zones such as in Japan and Mexico and often coincide with strong geomagnetic storms. Power outages occurred in Acapulco and Mexico City allowing better viewing of the earthquake lights. The strongest aftershock today was an M 4.6. It was reported felt with intensity II in Tlalnepantla, Mexico.

 

The second strongest geomagnetic storm in the past four months hit mid-latitudes at the end of September 7 and early September 8. This reached maximum strength near 01:00 UT (SWPC data) and reached high latitude AP of 6 in mid-day starting around 02:00 UT. This storm may have triggered the M 7.0 mainshock about 02:00 UT in Guerrero, Mexico. It may also have helped trigger the earthquake lights at the same time. This geomagnetic storm is described in this summary as:

 

"The geomagnetic field saw disturbed  conditions today. The AP level was 14.  High latitude geomagnetic field also saw minor storm conditions with AP 33. The last geomagnetic storm of larger intensity occurred on August 28, 2021 and the second strongest at mid and high latitudes since late May, 2021. Seismicity  at low latitudes, near the geomagnetic equator and at high latitudes is likely to be enhanced in the next several days due to this storm." (September 8, 2021)

 

The relation between the new moon and strong geomagnetic storms in the region of Mexico had been discussed in previous issues of this summary as for example with an M 7.4 in Oaxaca on June 23, 2020:

 

"The new moon arrived June 21 (2020) at 06:41 UT. ...  Longitudes which are sub-solar at this time are near 77 East and 103 West. These include areas of central Asia including Hindu Kush, India and Tajikistan in the east and the central and western U.S. and western Mexico in the west. These will experience the maximum tidal stresses and are most likely to see tidally triggered seismicity at this time. Many area, especially those where fluids are important modulators of seismicity, can experience tidal enhancement of seismicity, and several large earthquakes are likely in the next eight days. Tidal triggering often occurs near local solar midnight and noon when alignment is most linear." (June 18-22, 2020)

 

The last major event in eastern or central Mexico of M>=7.4 on September 8, 2017, while primarily triggered by a strong geomagnetic excursion, occurred two days after the full moon, much as occurred in the current situation. Previous major quakes in the area have also coincided with full and new moons suggesting strong tidal triggering in the region as detailed below:

 

"The full moon will arrive on September 6 (2017) at 07:03 UT. Longitudes which are antisolar at this time (local solar midnight) are near 110 West while those which are subsolar (local solar noon) are near 70 East longitude. These include areas of the Rocky Mountains and western Mexico in the west and central Asia in the east. It is in these regions where the highest probability of tidal triggering exists for the next week." (September 8, 2017)

 

Likewise the event of March 30, 2012 of M 7.4 to the west of today's epicenter was also associated with the new moon. At the time this summary noted this as:

 

"This could have been finalized by the tidal effects of the new moon alignment which is complete tomorrow.  Activity near Tokyo, Japan is at exactly 103 degrees from the Oaxaca epicenter. This area may see enhanced seismicity in the coming days due to this relation. The Oaxaca event is also at 103-104 degrees from an M 5.6 in South Island, New Zealand which occurred several hours earlier and at 104 degrees from Crete" (March 20, 2012)

 

Likewise an M 7.2 on February 16, 2018, the last such quake in central Mexico of M>=7 occurred, the new moon was complete the day before as noted in this summary at the time:

 

"The new moon arrived on February 15 (2018) at 21:05 UT." (February  16-17. 2018)

 

It is not coincidental that the last great earthquake in Mexico occurred exactly four  years ago on September 8, 2017. Similar weather and geomagnetic conditions at the time of that M 8.1 in eastern Mexico to those current in the region had been discussed at the time i this summary in part as:

 

"several factors including the X9.3 solar flare yesterday, tidal stresses and the severe geomagnetic storms. It occurred within about an hour of local solar midnight, a time when these effects maximize. It is also directly west of  Hurricane Irma. Stresses on land associated with Irma probably were the major promotional effect triggering this earthquake" (September 8, 2017)

 

Forecasts 136767 had expected today's activity within about 25 km was likely around  September 4-7.

 

O: 08SEP2021 09:26:48  16.7N   99.7W ML=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 11:11:54  16.7N   99.8W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 20:01:19  16.7N   99.7W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 12:20:07  16.8N   99.8W ML=4.5  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 13:18:44  16.8N  100.0W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 13:28:09  16.8N   99.8W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 23:08:49  16.8N   99.8W ML=4.0  EMSC   GUERRERO, MEXICO

O: 08SEP2021 09:50:20  16.9N   99.8W mb=4.6  EMSC   GUERRERO, MEXICO

O:  8SEP2021 09:34:11  16.6N   99.6W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO    

P:  4SEP2021 136767    17.0N  100.0W 3.5-5.5 BAAAA  Oaxaca, Mexico             

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 ABAAA  Oaxaca, Mexico             

 

Moderate earthquakes in the South Sandwich Islands aftershock sequence also continued today. The strongest of these was an M 5.6 and none were reported felt. This is normal seismicity in this active aftershock area at this time. The M 5.6 occurred near local solar midnight and may have been promoted by strong tidal stresses associated with yesterday's new moon as noted in this and previous issues of this summary:

 

"The new moon arrived at 00:52 UT on September 7, 2021. Longitudes which were near local solar midnight at this time are in the Atlantic Ocean and western Europe near 15 West and include areas of the Central Mid-Atlantic and the South Sandwich Islands while those at local solar noon are near 165 East and include areas of the northern Kurils and the Sea of Okhotsk, Near Islands and western Aleutians as well as the Vanuatu/Loyalty Islands, Kermadec-Tonga-Fiji-New Zealand arc. These areas will see maximum tidal stresses with this new moon and are most likely to see enhanced seismicity in the next week." (September 6-9, 2021)

 

Forecast 136964 had expected today's activity within about 50 km was likely around September 7.

 

O: 09SEP2021 03:47:10  58.7S   25.2W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 09SEP2021 04:37:00  58.7S   25.0W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 09SEP2021 03:54:18  58.8S   25.4W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  8SEP2021 21:42:18  58.4S   25.5W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 AAAAA  So. Sandwich Islands        

 

A strong series of events also hit the West Chile Rise in the Pacific Ocean today and included events of M 5.6, 5.4, 5.3 and 5.2. The largest of these occurred near local solar noon and may have been promoted by tidal effects with the new moon, but energy from the M 7.0 in Mexico may also have enhanced this activity. This is the strongest activity within about 200 km on the West Chile Rise in more than 10 years - following an M 5.9 about 200 km southeast of this on  May 20, 2010 and an M 6.0 to the east on June 5, 2008. Forecast 136956 had expected today's activity was likely to the southeast in the Chile Rise around September 7. This activity is at the sixth node from the M 7.2 in Haiti of August 14 and may have been promoted by energy from that source.

 

O: 09SEP2021 03:08:20  38.1S   94.0W mb=4.6  EMSC   WEST CHILE RISE

O: 08SEP2021 15:33:58  38.2S   93.9W mb=4.9  EMSC   WEST CHILE RISE

O: 08SEP2021 15:37:17  38.2S   93.9W mb=4.6  EMSC   WEST CHILE RISE

O: 08SEP2021 16:37:27  38.2S   93.9W Mw=5.6  EMSC   WEST CHILE RISE

O: 08SEP2021 23:13:47  38.2S   94.0W Mw=5.3  EMSC   WEST CHILE RISE

O: 08SEP2021 23:48:44  38.2S   93.9W Mw=5.4  EMSC   WEST CHILE RISE

O: 08SEP2021 21:17:33  38.3S   93.7W mb=4.9  EMSC   WEST CHILE RISE

O: 09SEP2021 01:12:10  38.3S   93.9W mb=4.8  EMSC   WEST CHILE RISE

O: 09SEP2021 01:43:33  38.3S   93.9W mb=4.6  EMSC   WEST CHILE RISE

O: 09SEP2021 06:42:48  38.3S   93.7W mb=5.2  EMSC   WEST CHILE RISE

O:  8SEP2021 10:33:14  36.3S   98.1W mb=4.6  EMSC   SOUTHEAST OF EASTER ISLAND    

O:  8SEP2021 21:56:48  38.1S   93.9W mb=4.7  EMSC   WEST CHILE RISE              

P:  7SEP2021 136956    41.0S   91.0W 4.0-5.6 ACBAA  Chile Rise                 

 

 

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. Forecast 136889 had expected today's activity in Yellowstone was likely around September 10.

 

O: 08SEP2021 17:18:06  44.2N  110.8W Md=2.3  EMSC   YELLOWSTONE NAT. PARK, WYOMING

O: 08SEP2021 18:00:12  44.2N  110.8W ML=3.0  EMSC   YELLOWSTONE NAT. PARK, WYOMING

O:  8SEP2021 17:01:33  44.2N  110.8W ML=3.0  EMSC   YELLOWSTONE NAT. PARK, WYOMING

P: 10SEP2021 136889    44.6N  110.8W 2.0-4.2 AAAAA  Yellowstone/Wyoming        

 

A series of earthquakes north of Mexico in Western Texas was also energized today. The strongest of these was an M 4.2 but the swarm began near local solar  midnight about 6 hours after the M 7.0 in Mexico and may have been promoted from Mexico or by tidal and geomagnetic stresses. An M 4.2 last occurred in this area on September 3 and is among the four largest such events in the region in the past year. Many of these have occurred at full or new moons and appear tidally related. Forecast 136829 had expected today's activity was likely around September 6.

 

NEIC reported this earthquake of M 4.2 in Western Texas was felt with intensity II-III in the area(s) of  Carlsbad, New Mexico.  An earlier event of M 2.6 was felt in western Texas with intensity II.

 

O: 08SEP2021 07:28:24  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS

O: 08SEP2021 08:50:22  31.7N  104.4W ML=2.0  EMSC   WESTERN TEXAS

O: 08SEP2021 11:22:16  31.7N  104.4W ML=2.5  EMSC   WESTERN TEXAS

O: 08SEP2021 12:05:56  31.7N  104.4W ML=2.2  EMSC   WESTERN TEXAS

O: 08SEP2021 22:02:05  31.7N  104.4W Mw=4.0  EMSC   WESTERN TEXAS

O: 08SEP2021 22:02:05  31.7N  104.4W Mw=4.2  ANSS   WESTERN TEXAS

O:  8SEP2021 13:44:41  31.6N  104.2W ML=2.4  EMSC   WESTERN TEXAS                

O:  8SEP2021 13:44:41  31.6N  104.2W ML=2.4  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

Another moderately strong event of M 5.8 also occurred in the Tonga/Fiji area today - the third such event in the area in the past three days. Forecast 136944 had expected this event within about 150 km was likely around September 8. It occurred near the geomagnetic equator and may have been promoted by the strong geomagnetic storm today.

 

O:  9SEP2021 04:59:43  19.2S  176.5W Mw=5.8  EMSC   FIJI REGION                  

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 AABAA  Tonga 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:  8SEP2021 15:43:00  34.8N   45.0E mb=4.6  EMSC   IRAQ                         

P:  5SEP2021 136840    33.0N   46.0E 3.8-5.5 BBAAA  So. Iran                   

 

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

 

INDONESIA AND PHILIPPINES

 

O:  8SEP2021 12:56:25   0.4S  123.1E ML=4.5  EMSC   SULAWESI, INDONESIA          

P:  5SEP2021 136719     0.0N  123.0E 4.0-5.5 BAAAA  Mindanao, Philippines      

 

O:  8SEP2021 07:58:25   3.3N   96.2E ML=4.6  EMSC   NORTHERN SUMATRA, INDONESIA  

P:  2SEP2021 136721     4.0N   93.0E 4.0-5.4 CACAA  Nicobar Islands            

P: 10SEP2021 136720     0.0N   97.0E 4.0-5.4 ACAAA  Nicobar Islands            

 

O:  9SEP2021 02:16:32   4.0S  135.0E mb=5.0  EMSC   PAPUA, INDONESIA             

P:  6SEP2021 136742     4.0S  135.0E 4.0-5.6 BAAAA  West Irian, PNG            

 

O:  9SEP2021 05:18:01   5.0S  102.4E ML=4.0  EMSC   SOUTHERN SUMATRA, INDONESIA  

P: 10SEP2021 136739     2.0S  101.0E 4.0-5.6 ACBAA  So. of Sumatera            

 

O: 08SEP2021 08:44:39   6.2N  126.8E ML=4.8  EMSC   MINDANAO, PHILIPPINES

O:  9SEP2021 05:19:52   5.9N  126.2E mb=4.5  EMSC   MINDANAO, PHILIPPINES        

P: 10SEP2021 136718     7.0N  127.0E 4.0-5.4 ABAAA  Halmahera                  

 

O:  8SEP2021 15:36:57   9.0S  118.9E ML=4.0  EMSC   SUMBAWA REGION, INDONESIA    

P:  7SEP2021 136931    11.0S  116.0E 4.0-5.6 ABCAA  So. of Indonesia           

 

O:  9SEP2021 06:55:13   9.8S  120.7E ML=4.6  EMSC   SUMBA REGION, INDONESIA      

P:  3SEP2021 136729     7.0S  120.0E 4.0-5.5 CCAAA  Flores Island area         

 

O:  9SEP2021 03:02:24  10.1N   93.8E mb=4.7  EMSC   ANDAMAN ISLANDS, INDIA REGION

P:  7SEP2021 136743    11.0N   95.0E 4.0-5.6 AAAAA  Andaman Islands            

 

O:  9SEP2021 03:25:29  10.5S  113.3E ML=4.1  EMSC   SOUTH OF JAVA, INDONESIA     

P:  7SEP2021 136931    11.0S  116.0E 4.0-5.6 AACAA  So. of Indonesia           

 

 

CENTRAL AND SOUTH AMERICA

 

O:  9SEP2021 01:14:22   6.9S   72.8W mb=4.8  EMSC   AMAZONAS, BRAZIL             

P:  5SEP2021 136735     6.0S   76.0W 4.0-5.8 BACAA  No. Peru                   

 

NEIC reported this earthquake of M 4.8 in Amazonas, Brazil was felt with intensity II-III in the area(s) of Amazonas, Brazil at Cruzeiro do Sol, Acre.

 

O:  9SEP2021 04:27:33   9.1N   83.9W mb=4.4  EMSC   COSTA RICA                   

P:  8SEP2021 136717     9.0N   84.0W 3.5-5.1 AAAAA  Costa Rica                 

 

NEIC reported this earthquake of M 4.4 in Costa Rica was felt with intensity II-III in the area(s) of Costa Rica in Palmares. Alajuela and San Isidro, San Jose.

 

O:  9SEP2021 06:02:51  17.9N   67.0W ML=3.1  EMSC   PUERTO RICO REGION           

P:  6SEP2021 136768    18.0N   67.0W 3.4-5.4 BAAAA  Puerto Rico                

 

O:  8SEP2021 12:05:28  18.5N  106.7W mb=4.3  EMSC   OFF COAST OF JALISCO, MEXICO 

P:  4SEP2021 136749    18.0N  106.0W 3.5-5.7 BAAAA  Coast of Jalisco, Mexico   

 

O:  8SEP2021 19:50:29  19.6N   71.6W ML=3.4  EMSC   DOMINICAN REPUBLIC           

P:  5SEP2021 136771    19.0N   71.0W 3.4-5.3 BAAAA  Puerto Rico                

 

O:  8SEP2021 10:11:13  21.7S   68.4W mb=4.1  EMSC   ANTOFAGASTA, CHILE           

P:  6SEP2021 136935    21.0S   68.0W 4.0-5.8 AAAAA  Argentina                  

 

 

O: 08SEP2021 14:48:57  16.8N   95.2W ML=4.0  EMSC   OAXACA, MEXICO

O:  8SEP2021 07:33:07  16.4N   94.5W ML=4.2  EMSC   OAXACA, MEXICO               

P:  7SEP2021 136747    16.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 08SEP2021 09:26:48  16.7N   99.7W ML=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 11:11:54  16.7N   99.8W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 20:01:19  16.7N   99.7W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 12:20:07  16.8N   99.8W ML=4.5  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 13:18:44  16.8N  100.0W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 13:28:09  16.8N   99.8W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 23:08:49  16.8N   99.8W ML=4.0  EMSC   GUERRERO, MEXICO

O: 08SEP2021 09:50:20  16.9N   99.8W mb=4.6  EMSC   GUERRERO, MEXICO

O:  8SEP2021 09:34:11  16.6N   99.6W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO    

P:  4SEP2021 136767    17.0N  100.0W 3.5-5.5 BAAAA  Oaxaca, Mexico             

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 ABAAA  Oaxaca, Mexico             

 

O: 08SEP2021 08:41:41  18.5N   73.9W ML=3.3  EMSC   HAITI REGION

O:  8SEP2021 10:08:11  18.4N   73.6W ML=3.3  EMSC   HAITI REGION                 

 

AFRICA AND EUROPE

 

O:  8SEP2021 11:28:38  44.3N   17.9E mb=4.3  EMSC   BOSNIA AND HERZEGOVINA       

P:  8SEP2021 136852    43.0N   18.0E 3.0-5.3 ABAAA  Adriatic Sea               

 

NEIC reported this earthquake of M 4.3 in Bosnia and Herzegovina was felt with intensity II-III in the area(s) of Bosnia and Herzegovina at Vitez Federacja (IV), Bosovaca, Zavidovici, Kobilja Glava, Sarajevo, Listica and in Backa Topola, Servia and Montenegro.

 

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

 

SOUTHWEST PACIFIC

 

O:  9SEP2021 00:51:40  18.2S  177.9W mb=4.3  EMSC   FIJI REGION                  

P:  8SEP2021 136932    18.0S  178.0W 4.0-5.8 AAAAA  Tonga Islands              

 

O:  9SEP2021 04:59:43  19.2S  176.5W Mw=5.8  EMSC   FIJI REGION                  

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 AABAA  Tonga Islands              

 

OCEAN RIDGES

 

O:  9SEP2021 06:40:42  13.0N   57.6E mb=4.6  EMSC   OWEN FRACTURE ZONE REGION    

P:  1SEP2021 136744    15.0N   57.0E 3.5-5.0 CBAAA  Arabian Sea                

P:  5SEP2021 136752    15.0N   54.0E 3.5-5.1 BBCAA  Gulf of Aden               

 

O: 09SEP2021 03:08:20  38.1S   94.0W mb=4.6  EMSC   WEST CHILE RISE

O: 08SEP2021 15:33:58  38.2S   93.9W mb=4.9  EMSC   WEST CHILE RISE

O: 08SEP2021 15:37:17  38.2S   93.9W mb=4.6  EMSC   WEST CHILE RISE

O: 08SEP2021 16:37:27  38.2S   93.9W Mw=5.6  EMSC   WEST CHILE RISE

O: 08SEP2021 23:13:47  38.2S   94.0W Mw=5.3  EMSC   WEST CHILE RISE

O: 08SEP2021 23:48:44  38.2S   93.9W Mw=5.4  EMSC   WEST CHILE RISE

O: 08SEP2021 21:17:33  38.3S   93.7W mb=4.9  EMSC   WEST CHILE RISE

O: 09SEP2021 01:12:10  38.3S   93.9W mb=4.8  EMSC   WEST CHILE RISE

O: 09SEP2021 01:43:33  38.3S   93.9W mb=4.6  EMSC   WEST CHILE RISE

O: 09SEP2021 06:42:48  38.3S   93.7W mb=5.2  EMSC   WEST CHILE RISE

O:  8SEP2021 10:33:14  36.3S   98.1W mb=4.6  EMSC   SOUTHEAST OF EASTER ISLAND   

O:  8SEP2021 21:56:48  38.1S   93.9W mb=4.7  EMSC   WEST CHILE RISE              

P:  7SEP2021 136956    41.0S   91.0W 4.0-5.6 ACBAA  Chile Rise                 

 

O: 09SEP2021 03:47:10  58.7S   25.2W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 09SEP2021 04:37:00  58.7S   25.0W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 09SEP2021 03:54:18  58.8S   25.4W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  8SEP2021 21:42:18  58.4S   25.5W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   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:  9SEP2021 01:32:45  27.9N  139.8E mb=4.2  EMSC   BONIN ISLANDS, JAPAN REGION  

O:  9SEP2021 04:11:53  29.4N  142.2E Mw=5.4  EMSC   IZU ISLANDS, JAPAN REGION    

P:  4SEP2021 136776    28.0N  142.0E 4.0-5.6 BBAAA  Bonin Islands              

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 08SEP2021 21:17:52  32.4N  115.2W ML=2.9  EMSC   BAJA CALIFORNIA, MEXICO

O:  8SEP2021 18:19:18  32.3N  115.1W Ml=2.5  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    32.6N  116.1W 2.5-4.9 AAAAA  So. California             

 

O:  8SEP2021 08:37:22  33.2N  115.6W Ml=2.3  EMSC   SOUTHERN CALIFORNIA          

P:  8SEP2021 136831    33.0N  115.9W 2.5-5.0 AAAAA  So. California             

 

O:  8SEP2021 10:22:53  34.0N  117.2W Ml=2.7  EMSC   GREATER LOS ANGELES AREA, CALI

P:  6SEP2021 136833    33.7N  117.5W 2.5-4.6 AAAAA  So. California             

 

NEIC reported this earthquake of M 2.7 in Southern California was felt with intensity II-III in the area(s) of Southern California at Redlands, Ponoma and Cathedral City.

 

O:  8SEP2021 19:12:01  35.6N  117.5W Ml=2.2  EMSC   SOUTHERN CALIFORNIA          

P:  5SEP2021 136836    35.0N  117.7W 2.5-4.4 BAAAA  So. California             

 

O:  8SEP2021 20:01:24  36.1N  117.8W Ml=2.5  EMSC   CENTRAL CALIFORNIA           

P:  9SEP2021 136796    36.1N  118.1W 2.5-4.6 AAAAA  California/Nevada area     

 

O:  9SEP2021 01:31:24  36.7N  121.3W Md=2.6  EMSC   CENTRAL CALIFORNIA           

P:  9SEP2021 136802    36.6N  120.7W 2.5-4.5 AAAAA  Central California         

 

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

 

O:  8SEP2021 08:44:25  38.2N  118.0W ml=2.5  EMSC   NEVADA                       

P:  5SEP2021 136800    37.8N  118.2W 2.5-4.6 BAAAA  California/Nevada area     

 

O:  8SEP2021 21:42:09  38.3N  116.0W ml=3.3  EMSC   NEVADA                       

P:  5SEP2021 136799    37.8N  115.8W 2.5-4.8 AAAAA  California/Nevada area     

 

O:  9SEP2021 03:38:37  38.6N  119.5W ml=2.5  EMSC   CENTRAL CALIFORNIA            

P:  6SEP2021 136801    38.6N  118.6W 2.5-4.8 BAAAA  California/Nevada area     

 

O:  8SEP2021 12:04:44  38.8N  122.8W Md=2.1  EMSC   NORTHERN CALIFORNIA          

O: 08SEP2021 15:08:36  38.8N  122.8W Md=2.2  EMSC   NORTHERN CALIFORNIA

P:  6SEP2021 136806    38.8N  122.8W 2.5-4.5 AAAAA  Central California         

 

 

ALASKA

 

O:  8SEP2021 19:35:28  55.5N  156.1W ML=3.0  EMSC   SOUTH OF ALASKA              

P:  6SEP2021 136890    54.7N  157.9W 3.5-5.1 AAAAA  Alaska Peninsula           

 

O:  8SEP2021 18:31:13  55.5N  159.6W ML=3.1  EMSC   ALASKA PENINSULA             

P: 10SEP2021 136908    54.3N  161.4W 3.5-5.1 ABAAA  Unimak Islands, Aleutians  

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

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

 

ROCKY MOUNTAINS REGION

 

O: 08SEP2021 07:28:24  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS

O: 08SEP2021 08:50:22  31.7N  104.4W ML=2.0  EMSC   WESTERN TEXAS

O: 08SEP2021 11:22:16  31.7N  104.4W ML=2.5  EMSC   WESTERN TEXAS

O: 08SEP2021 12:05:56  31.7N  104.4W ML=2.2  EMSC   WESTERN TEXAS

O: 08SEP2021 22:02:05  31.7N  104.4W Mw=4.0  EMSC   WESTERN TEXAS

O:  8SEP2021 13:44:41  31.6N  104.2W ML=2.4  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

O:  8SEP2021 09:10:17  32.1N  102.2W mb=2.6  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

O: 08SEP2021 17:18:06  44.2N  110.8W Md=2.3  EMSC   YELLOWSTONE NAT. PARK, WYOMING

O: 08SEP2021 18:00:12  44.2N  110.8W ML=3.0  EMSC   YELLOWSTONE NAT. PARK, WYOMING

O:  8SEP2021 17:01:33  44.2N  110.8W ML=3.0  EMSC   YELLOWSTONE NAT. PARK, WYOMING

P: 10SEP2021 136889    44.6N  110.8W 2.0-4.2 AAAAA  Yellowstone/Wyoming        

 

O: 08SEP2021 15:26:17  44.3N  115.2W Ml=2.2  EMSC   SOUTHERN IDAHO

O:  8SEP2021 13:34:28  44.3N  115.2W Ml=2.9  EMSC   SOUTHERN IDAHO               

P:  7SEP2021 136862    44.4N  115.2W 2.0-4.0 AAAAA  Montana/Idaho              

 

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

 

 

EASTERN U.S./CANADA

 

O:  8SEP2021 15:13:57  35.1N   95.3W ML=2.4  EMSC   OKLAHOMA                     

P: 10SEP2021 136842    35.0N   96.0W 2.0-4.1 AAAAA  Southern Plains            

 

O: 07SEP2021 13:53:27  72.0N   75.3W MB=3.7  ECAN Pond Inlet, NU   

O: 07SEP2021 05:51:29  72.1N   73.1W MB=2.4  ECAN Pond Inlet, NU   

O:  7SEP2021 15:01:20  72.0N   75.3W MB=2.0  ECAN Pond Inlet, NU                 

 

O:  8SEP2021 06:34:03  49.3N   61.8W MB=2.0  ECAN Natashquan, QC                 

 

O:  8SEP2021 02:14:45  44.6N   57.2W MB=4.0  ECAN Louisbourg, NS                 

 

O:  7SEP2021 22:46:21  47.2N   76.5W MB=2.3  ECAN Ferme-Neuve, QC                 

P:  5SEP2021 136868    47.0N   76.0W 2.0-4.3 AAAAA  New York State             

 

 

HAWAII

 

O:  9SEP2021 04:34:48  19.2N  155.4W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII     

O:  9SEP2021 04:34:48  19.2N  155.4W ML=3.5  ANSS   ISLAND OF HAWAII, HAWAII     

P: 10SEP2021 136779    20.4N  155.1W 4.0-5.6 ABAAA  Hawaii area                

 

NEIC reported this earthquake of M 3.5-3.9 in Hawaii was felt with intensity II-III in the area(s) of Hawaii at Hawaii National Park, Naalehu, Volcano, Mountain View, Captain Cook, Holualca, Keelakekua, Honomu, Kailua Kona and Laupahoehoe.

 

MAJOR EARTHQUAKE DAMAGING, DEADLY IN GUERRERO, MEXICO

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 7, 2021

 

A major earthquake of M 7.0 shook the region of Guerrero, Mexico south of Mexico City today. A foreshock of M 4.2 occurred several hours before the mainshock and was felt in Guerrero with IV at Acatlan, Zihuatanejo, Coatepec,Mexico City and II-III in Tlapa, Santos Reys, Oaxaca, Vista Hermosa, Naucalpan, Chautla, Puebla and in Cuernavaca, Morelos, Mexico. NEIC reported the mainshock was felt with maximum intensity VII with slight damage in Guerrero, Mexico at Acapulco, Chipancingo, and VI in El Ocotilo, Tepecoacuillc, Tizapotla and Taxco with IV in Tlapa and Huamuxtitlan and II-III in Xaltianguis and Petatlan and in Mexico City. A number of aftershocks were lightly felt in the Mexico City and Tlalnepantla, Mexico area. Reuters reported at least one person died in the quake when a pole fell on him. The earthquake was centered near Acapulco, Mexico and caused damage as far north as Mexico City with landslides. Tall buildings swayed and cars were crushed by falling debris. A tsunami alert was not issued but minor sea level fluctuations may have occurred. No earthquakes of M>=7 have occurred within about 100 km of today's epicenter in the past 30 ye3ars. Earthquakes within about 250 km of this occurred about 250 km northeast on September 19, 2017 and to the northwest on April 18, 2014. Similar events hit to the east of this on March 20, 2012 (M 7.4); February 25, 1996 (M 7.1) and September 14, 1995 (M 7.4). This earthquake occurred with the new moon and was probably promoted by strong tidal stresses associated with that alignment. This report had expected enhanced seismicity with this new moon in previous issues as:

 

 

"The new moon will arrive at 00:52 UT on September 7, 2021. Longitudes which are near local solar midnight at this time are in the Atlantic Ocean and western Europe near 15 West and include areas of the Central Mid-Atlantic and the South Sandwich Islands while those at local solar noon are near 165 East and include areas of the northern Kurils and the Sea of Okhotsk, Near Islands and western Aleutians as well as the Vanuatu/Loyalty Islands, Kermadec-Tonga-Fiji-New Zealand arc. These areas will see maximum tidal stresses with this new moon and are most likely to see enhanced seismicity in the next week." (September 5-6, 2021)

 

The last major earthquake of M>=7 in the world was an M 7.0 on August 18, 2021 in the Vanuatu Islands. It is located near 100 degrees from both the South Sandwich Islands quake of M 8.1 of August 12 and the Vanuatu earthquake and was probably promoted by energy from those sources.

 

A Tropical Depression made landfall off the coast of Guerrero, Mexico about the time of the M 7.0. Stresses associated with this storm probably also  helped promote seismicity in this region of Mexico at this time as reported in this summary as:

 

"Tropical Depression 15E formed  south of western Mexico today with winds up to 40 kts. This system is expected to track to the north and west and may enhance seismicity in western and central Mexico. The M 7.0 in Guerrero, Mexico today may have been promoted by stresses associated with this storm." (September 6-7, 2021)

 

A series of moderate earthquakes north of this epicenter has been occurring over the past two days. It is likely that this was precursory to today's event in Guerrero, Mexico. This summary had noted this activity in previous issues as:

 

 

"Moderate earthquakes of M 4.3, 4.4 and 4.4 was felt widely in northern and western Mexico in San Luis Potosi and Guanajuato States of Mexico. NEIC reported maximum intensity V in Ahualulco and IV in San Felipe, Zaragoza, Edina and II-III in Escalerillas, San Luis Potosi, Soledad, Leion Jauregui and Juarez. The only other event of M>=4.4 within about 250 km of this epicenter in the past 30 years was an M 4.4 about 250 km north of this on June 4, 2004. This series began yesterday with an M 4.3 and an M 4.1. These events are located at 103 degrees from the South Sandwich Islands M 8.1 of August 12 and were probably promoted  from that source. Forecast 136767 had expected enhanced seismicity south of this around September 7." (September 6-7, 2021)

 

The forecast noted here referenced a possible moderate to strong quake about

100 km north of today's Mexico quake as:

 

 

O: 05SEP2021 11:07:43  21.7N  101.0W ML=4.3  EMSC   GUANAJUATO, MEXICO

O: 06SEP2021 04:49:49  21.7N  101.1W ML=4.4  EMSC   GUANAJUATO, MEXICO

O:  6SEP2021 02:31:16  21.6N  100.9W mb=4.4  EMSC   GUANAJUATO, MEXICO           

O:  7SEP2021 08:49:02  21.7N  101.0W ML=3.8  EMSC   GUANAJUATO, MEXICO           

P:  6SEP2021 136760    18.0N  102.0W 3.5-5.4 ACAAA  Michoacan, Mexico          

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 ACAAA  Oaxaca, Mexico             

 

Forecast 136767 had expected today's activity was likely within about 25 km  of the mainshock between September 4 and 8.

 

O: 08SEP2021 03:50:47  16.8N   99.8W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 02:41:55  16.9N   99.9W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 02:41:55  16.9N   99.9W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 03:30:20  16.9N   99.9W ML=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 04:17:50  16.9N   99.9W ML=4.2  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 04:24:15  16.9N   99.8W ML=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 02:18:02  17.0N   99.8W mb=4.9  EMSC   GUERRERO, MEXICO

O: 08SEP2021 00:55:24  17.1N   99.4W mb=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 02:58:20  17.1N   99.8W mb=4.7  EMSC   GUERRERO, MEXICO

O:  8SEP2021 03:53:33  16.0N   98.4W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO      

O:  8SEP2021 05:43:05  17.1N   99.7W mb=4.5  EMSC   GUERRERO, MEXICO             

O: 08SEP2021 01:47:46  17.0N   99.8W Mw=7.0  EMSC   GUERRERO, MEXICO

P:  4SEP2021 136767    17.0N  100.0W 3.5-5.5 BAAAA  Oaxaca, Mexico             

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 AAAAA  Oaxaca, Mexico             

 

 

An earthquake of M 5.3-5.5 north of Afghanistan was felt in Tajikistan today in Murgob Gorno-Badakhshan and Dushanbe with intensity V and II respectively. It was also reported felt with intensity II in Faizabad, Afghanistan. This is the strongest in a series of moderate earthquake in the region which began in late August and has included nine moderate quakes of M>=4 including those of M 5.0 in the Hindu Kush, Afghanistan on September 2 and August 30. An earthquake of M 5.9  hit this area on February 12, 2021 and this is probably an aftershock of that earthquake. Similar quakes hit the area on Jun 16 and January 24, 2020. Today's event is located at 103 degrees from the M 7.0 in Vanuatu of August 18 and was probably promoted by energy from that source. This summary noted this swarm previously as:

 

 

"A moderate earthquake of M 5.0 in Afghanistan today continued moderate seismicity in that region which has been occurring over the past several days. This summary noted this in previous issues as:

 

"An unusual earthquake of M 4.5 occurred today in Central Afghanistan, accompanying the major geomagnetic storm today. This epicenter is located in the mountains west of Kabul, Afghanistan. The last earthquake within about 250 km of this epicenter in Afghanistan was an M 5.0 and 4.7 aftershock on January 15, 2007." (August 27-28, 2021)

 

Two earthquakes of larger magnitude have occurred within about 200 km of this epicenter in Afghanistan in the past year - an M 5.5 on January 16, 2021 and an M 5.2 on August 15." (August 30-31, 2021)

 

Forecast 136812 had expected today's activity within about 100 km was likely around September 6.

 

O: 07SEP2021 13:34:13  38.2N   73.3E mb=4.7  EMSC   TAJIKISTAN

O:  8SEP2021 05:20:02  38.2N   73.2E mb=5.5  EMSC   TAJIKISTAN                   

P:  6SEP2021 136812    39.0N   72.0E 3.8-5.3 AAAAA  Hindu Kush/Pakistan        

 

A strong earthquake of M 6.0 was also felt in the area of Tonga/Fiji today. NEIC reported maximum intensity V in Nuku'alofa and II-III in Suva, and Navua, Central Fiji and in Apia, Samoa.  The last shallow focus earthquake of M>=6 within about 200 km of today's epicenter was an M 6.4 on Octgober 1, 2020 and an M 6.1 on November 11, 2019. Forecast 136944 had expected today's activity within about 100 km was likely around September 8.

 

O:  7SEP2021 09:49:57  19.4S  176.1W Mw=5.8  EMSC   FIJI REGION                  

O:  7SEP2021 09:49:57  19.4S  176.1W Mw=6.0  ANSS   FIJI REGION                  

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 AAAAA  Tonga 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:  7SEP2021 16:19:11  24.5N  122.0E ML=4.3  TAI    Hualien, Taiwan              

P:  6SEP2021 136787    25.0N  122.0E 4.0-5.5 AAAAA  Ryukyu Islands             

 

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

 

O: 07SEP2021 13:34:13  38.2N   73.3E mb=4.7  EMSC   TAJIKISTAN

O:  8SEP2021 05:20:02  38.2N   73.2E mb=5.5  EMSC   TAJIKISTAN                   

P:  6SEP2021 136812    39.0N   72.0E 3.8-5.3 AAAAA  Hindu Kush/Pakistan        

 

O:  7SEP2021 16:50:33  48.6N  106.1E mb=4.4  EMSC   CENTRAL MONGOLIA             

P:  2SEP2021 136906    50.0N  113.0E 3.0-4.5 BBCAA  So. Siberia                

 

NEIC reported this earthquake of M 4.4 in Central Mongolia was felt with intensity IV-V   in the area(s) of Central Mongolia at Zuunharaa, Zuumod, Nalajh and in Ulaanbaatar.

 

O:  8SEP2021 02:28:33  55.5N  166.4E mb=4.9  EMSC   KOMANDORSKIYE OSTROVA REGION 

P:  7SEP2021 136900    55.0N  166.0E 4.0-6.0 AAAAA  Komandorsky Isl            

 

INDONESIA AND PHILIPPINES

 

O:  7SEP2021 08:53:19   3.2S  102.4E ML=4.6  EMSC   SOUTHERN SUMATRA, INDONESIA  

P: 10SEP2021 136739     2.0S  101.0E 4.0-5.6 BBBAA  So. of Sumatera            

 

O:  7SEP2021 14:00:18   4.7N  127.0E ML=4.5  EMSC   KEPULAUAN TALAUD, INDONESIA  

P: 29AUG2021 136439     5.0N  127.0E 4.0-5.4 CAAAA  Halmahera                  

 

O:  8SEP2021 05:15:17   6.0N  126.9E ML=4.5  EMSC   MINDANAO, PHILIPPINES        

P: 10SEP2021 136718     7.0N  127.0E 4.0-5.4 AAAAA  Halmahera                  

 

O:  8SEP2021 00:13:00   7.5S  128.4E mb=4.6  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P:  9SEP2021 136724     7.0S  128.0E 4.0-5.4 AAAAA  Banda Sea                  

 

O:  7SEP2021 18:29:22   8.3N  126.6E mb=4.6  EMSC   MINDANAO, PHILIPPINES        

P: 10SEP2021 136718     7.0N  127.0E 4.0-5.4 BBAAA  Halmahera                  

 

O:  8SEP2021 01:33:28  18.7N  145.8E mb=4.6  EMSC   PAGAN REG., N. MARIANA ISLANDS

P:  4SEP2021 136764    18.0N  145.0E 4.0-5.4 BAAAA  No. Marianas               

 

 

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

 

CENTRAL AND SOUTH AMERICA

 

O: 08SEP2021 03:50:47  16.8N   99.8W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 02:41:55  16.9N   99.9W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 02:41:55  16.9N   99.9W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 03:30:20  16.9N   99.9W ML=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 04:17:50  16.9N   99.9W ML=4.2  EMSC   OFFSHORE GUERRERO, MEXICO

O: 08SEP2021 04:24:15  16.9N   99.8W ML=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 01:47:46  17.0N   99.8W Mw=7.0  EMSC   GUERRERO, MEXICO

O: 08SEP2021 02:18:02  17.0N   99.8W mb=4.9  EMSC   GUERRERO, MEXICO

O: 08SEP2021 00:55:24  17.1N   99.4W mb=4.2  EMSC   GUERRERO, MEXICO

O: 08SEP2021 02:58:20  17.1N   99.8W mb=4.7  EMSC   GUERRERO, MEXICO

O:  8SEP2021 03:53:33  16.0N   98.4W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO      

O:  8SEP2021 05:43:05  17.1N   99.7W mb=4.5  EMSC   GUERRERO, MEXICO             

P:  4SEP2021 136767    17.0N  100.0W 3.5-5.5 BAAAA  Oaxaca, Mexico             

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 AAAAA  Oaxaca, Mexico             

 

O:  8SEP2021 02:00:50  13.2N   89.8W ML=4.6  EMSC   OFFSHORE EL SALVADOR         

P:  7SEP2021 136751    14.0N   90.0W 3.5-5.3 AAAAA  Guatemala                  

 

O:  7SEP2021 21:21:32  15.5N   95.4W ML=4.2  EMSC   OFFSHORE OAXACA, MEXICO      

P:  7SEP2021 136747    16.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O:  7SEP2021 13:22:14  17.4S   69.4W mb=4.5  EMSC   LA PAZ, BOLIVIA              

P:  8SEP2021 136929    17.0S   70.0W 4.0-5.6 AAAAA  So. Peru/Bolivia           

 

O: 07SEP2021 17:28:14  19.1N   66.5W Md=3.2  EMSC   PUERTO RICO REGION

O:  7SEP2021 09:18:59  18.3N   66.1W Md=3.2  EMSC   PUERTO RICO                  

P:  6SEP2021 136768    18.0N   67.0W 3.4-5.4 AAAAA  Puerto Rico                

 

O:  7SEP2021 21:26:24  18.4N   68.6W ML=3.0  EMSC   DOMINICAN REPUBLIC            

P:  6SEP2021 136770    19.0N   69.0W 3.4-5.3 AAAAA  Puerto Rico                

 

O: 07SEP2021 10:13:51  18.9N   67.6W Md=3.1  EMSC   PUERTO RICO REGION

O:  8SEP2021 05:59:03  19.0N   67.5W Md=3.3  EMSC   PUERTO RICO REGION           

P:  6SEP2021 136768    18.0N   67.0W 3.4-5.4 AAAAA  Puerto Rico                

 

O:  7SEP2021 08:49:02  21.7N  101.0W ML=3.8  EMSC   GUANAJUATO, MEXICO           

P:  6SEP2021 136760    18.0N  102.0W 3.5-5.4 ACAAA  Michoacan, Mexico          

 

O:  7SEP2021 23:57:57  24.3S   67.3W mb=4.1  EMSC   SALTA, ARGENTINA             

P:  4SEP2021 136935    24.0S   64.0W 4.0-5.4 BACAA  Argentina                  

 

O:  7SEP2021 14:24:00  38.0S   74.2W mb=4.4  EMSC   OFFSHORE BIO-BIO, CHILE      

P:  9SEP2021 136949    39.0S   73.0W 4.0-5.8 AAAAA  Central Chile              

 

AFRICA AND EUROPE

 

O:  7SEP2021 11:15:01  36.1N   31.0E mb=4.5  EMSC   WESTERN TURKEY               

P:  7SEP2021 136845    38.0N   30.0E 3.5-5.1 ABAAA  Turkey                     

 

O:  8SEP2021 01:40:02  36.5N   27.1E ML=4.5  EMSC   DODECANESE IS.-TURKEY BORDER R

O:  7SEP2021 21:55:22  36.5N   27.1E mb=4.3  EMSC   DODECANESE IS.-TURKEY BORDER R

P:  7SEP2021 136794    35.0N   26.0E 3.0-4.6 ABAAA  Aegean Sea                 

 

NEIC reported this earthquake of M 5.0 in the Dodecanese Islands, Greece was felt with intensity V in the area(s) of Kosovo Servia and Montenegro.

 

O:  7SEP2021 09:42:40  37.8N   29.6E ML=4.0  EMSC   WESTERN TURKEY               

P:  7SEP2021 136845    38.0N   30.0E 3.5-5.1 AAAAA  Turkey                     

 

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

 

SOUTHWEST PACIFIC

 

O:  7SEP2021 08:45:56  24.2S  179.7E mb=4.9  EMSC   SOUTH OF FIJI ISLANDS        

P:  7SEP2021 136946    25.0S  179.0E 4.0-5.4 AAAAA  Tonga/Fiji                 

 

O:  7SEP2021 09:49:57  19.4S  176.1W Mw=5.8  EMSC   FIJI REGION                  

O:  7SEP2021 09:49:57  19.4S  176.1W Mw=6.0  ANSS   FIJI REGION                  

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 AAAAA  Tonga Islands              

 

OCEAN RIDGES

 

O:  7SEP2021 10:22:08  59.4S   25.9W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 AAAAA  So. Sandwich Islands       

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  7SEP2021 08:47:05  31.4S  179.7E ML=4.7  EMSC   KERMADEC ISLANDS REGION      

P:  7SEP2021 136955    32.0S  179.0E 4.0-5.4 AAAAA  So. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O:  7SEP2021 13:25:10  35.3N  141.4E mb=4.6  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  4SEP2021 136825    36.0N  140.0E 4.0-5.5 BAAAA  Off East Coast Honshu      

 

O:  7SEP2021 18:41:23  39.3N  141.7E mb=4.4  EMSC   EASTERN HONSHU, JAPAN        

P:  8SEP2021 136856    42.0N  143.0E 3.5-5.5 ACAAA  Hokkaido, Japan            

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  7SEP2021 07:26:57  31.4N  115.5W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    31.3N  116.3W 2.5-4.8 AAAAA  So. California             

 

O:  7SEP2021 18:21:35  31.6N  114.5W ML=3.6  EMSC   GULF OF CALIFORNIA           

P:  4SEP2021 136829    30.3N  114.3W 2.5-4.8 BBAAA  So. California             

 

O: 07SEP2021 21:09:15  33.7N  116.8W Ml=2.4  EMSC   SOUTHERN CALIFORNIA

O:  7SEP2021 09:41:29  33.3N  116.8W Ml=2.7  EMSC   SOUTHERN CALIFORNIA          

P:  6SEP2021 136832    33.4N  116.7W 2.5-4.6 AAAAA  So. California             

 

NEIC reported this earthquake of M 2.7 in Southern California was felt with intensity II-III in the area(s) of Southern California at Santa Ysabel, Pala, Rancho Santa Margarita, Azusa, Carson and Northridge.

 

O:  7SEP2021 17:38:49  38.1N  118.7W ml=2.4  EMSC   NEVADA                       

P: 10SEP2021 136800    38.2N  118.8W 2.5-4.4 BAAAA  California/Nevada area     

 

O:  7SEP2021 19:41:18  38.2N  117.8W ml=2.4  EMSC   NEVADA                       

P:  6SEP2021 136801    38.6N  118.6W 2.5-4.8 AAAAA  California/Nevada area     

 

O:  7SEP2021 11:50:50  38.5N  119.5W ml=2.3  EMSC   CENTRAL CALIFORNIA           

P:  4SEP2021 136801    38.3N  119.3W 2.5-4.5 BAAAA  California/Nevada area     

 

O:  7SEP2021 17:39:07  40.5N  125.4W ML=2.9  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  8SEP2021 136873    40.7N  124.6W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

NEIC reported this earthquake of M 3.3 off the coast of Northern California was felt with intensity II-III in the area(s) of Northern California at Ferndale, Fortuna, Eureka and Korbel.

 

 

ALASKA

 

O:  7SEP2021 15:18:57  55.3N  157.2W ML=3.3  EMSC   ALASKA PENINSULA             

P:  6SEP2021 136890    54.7N  157.9W 3.5-5.1 AAAAA  Alaska Peninsula           

 

O:  7SEP2021 19:13:09  60.0N  140.1W ml=3.0  EMSC   SOUTHEASTERN ALASKA          

P:  5SEP2021 136907    59.0N  139.0W 3.0-4.6 AAAAA  Southeast Alaska           

 

O: 08SEP2021 02:21:58  61.9N  150.2W ml=3.1  EMSC   SOUTHERN ALASKA

O:  8SEP2021 00:57:24  61.5N  150.3W ML=3.1  EMSC   SOUTHERN ALASKA              

P:  8SEP2021 136912    61.3N  150.9W 3.2-5.3 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 Anchorage and Eagle River.

 

O:  7SEP2021 10:11:21  69.1N  144.7W ml=3.4  EMSC   NORTHERN ALASKA              

P:  7SEP2021 136917    68.9N  144.8W 3.0-4.9 AAAAA  Northern Alaska            

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  7SEP2021 16:44:35  43.0N  126.5W ML=2.5  EMSC   OFF COAST OF OREGON          

P:  7SEP2021 136874    41.8N  126.9W 2.5-4.8 ABAAA  Off Coast of No. Calif     

 

ROCKY MOUNTAINS REGION

 

O:  7SEP2021 18:39:58  31.7N  104.4W ML=3.1  EMSC   WESTERN TEXAS                

P:  3SEP2021 136827    32.5N  104.6W 2.0-3.9 BAAAA  SW U.S.A                   

 

O:  7SEP2021 08:19:29  32.1N  102.1W mb=2.4  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

O:  7SEP2021 11:27:01  44.5N  115.2W Ml=2.3  EMSC   SOUTHERN IDAHO               

P:  7SEP2021 136862    44.4N  115.2W 2.0-4.0 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O:  7SEP2021 07:47:21  35.0N   97.7W ML=2.2  EMSC   OKLAHOMA                     

P:  9SEP2021 136843    36.0N   99.0W 2.0-4.4 AAAAA  Southern Plains            

 

O: 07SEP2021 11:57:53  36.7N   89.6W Md=2.0  EMSC   SOUTHEASTERN MISSOURI

O:  8SEP2021 01:52:21  37.0N   90.0W Md=4.2  EMSC   SOUTHEASTERN MISSOURI        

P:  6SEP2021 136818    37.0N   90.0W 2.0-4.1 AAAAA  New Madrid area            

 

HAWAII

 

O:  7SEP2021 22:36:08  18.9N  155.2W ML=3.5  EMSC   HAWAII REGION, HAWAII        

O:  7SEP2021 12:27:42  19.2N  155.5W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII     

P:  3SEP2021 136779    19.3N  155.6W 4.0-5.7 BAAAA  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 Naalehu, Keeau, Pepeekeo, Honomu and Kihei. An earlier M 3.4 quake was felt lightly in Naalehu, Captain Cook and Volcano, Hawaii.

 

MODERATELY STRONG QUAKE FELT IN TONGA

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 5, 2021

 

The strongest earthquake in the world today was an M 5.9 in the Tonga Islands. NEIC reported it was felt with intensity IV in Nuku'alofa and II-III in Mu'a and Tofoa-Koloua, Tongatapu. The last earthquake within about 200 km of this epicenter in Tonga with M>=5.9 occurred more than a year ago as an M 5.9 on May 28, 2020 and prior to that an M 6.1 on June 15, 2019. Forecast 136689 and 136944 had expected this area would see enhanced seismicity in late August or early September.

 

O:  5SEP2021 17:51:44  21.9S  174.7W Mw=5.9  EMSC   TONGA                        

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 BBAAA  Tonga Islands              

P: 28AUG2021 136689    22.0S  175.0W 4.0-5.6 CAAAA  Tonga Islands              

 

Moderate earthquakes of M 4.3, 4.4 and 4.4 was felt widely in northern and western Mexico in San Luis Potosi and Guanajuato States of Mexico. NEIC reported maximum intensity V in Ahualulco and IV in San Felipe, Zaragoza, edina and II-III in Escalerillas, San Luis Potosi, Soledad, Leion Jauregui and Juarez. The only other event of M>=4.4 within about 250 km of this epicenter in the past 30 years was an M 4.4 about 250 km north of this on June 4, 2004. This series began yesterday with an M 4.3 and an M 4.1. These events are located at 103 degrees from the South Sandwich Islands M 8.1 of August 12 and were probably promoted  from that source. Forecast 136767 had expected enhanced seismicity south of

 this around September 7.

 

O: 05SEP2021 11:07:43  21.7N  101.0W ML=4.3  EMSC   GUANAJUATO, MEXICO

O: 06SEP2021 04:49:49  21.7N  101.1W ML=4.4  EMSC   GUANAJUATO, MEXICO

O:  6SEP2021 02:31:16  21.6N  100.9W mb=4.4  EMSC   GUANAJUATO, MEXICO           

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 ACAAA  Oaxaca, Mexico             

 

Strong aftershocks also continued today in the South Sandwich Islands. The largest of these was an M 5.4. This continues the strong and lengthy aftershock series following the M 8.1 in the region of August 12. Forecasts 136964 and 136965 had expected today's activity was likely around September 7 within about 50 km of these events. An M 4.6 event occurred within several minutes of local solar noon and was probably promoted by high tidal stresses which maximize near this hour.

 

O: 05SEP2021 13:47:43  58.6S   25.0W mb=4.6  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 09:59:01  58.7S   25.2W mb=5.4  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 10:17:53  58.8S   25.1W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 10:28:59  59.3S   25.3W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  5SEP2021 21:00:42  59.4S   25.8W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 AAAAA  So. Sandwich Islands       

P:  7SEP2021 136965    60.0S   29.0W 4.0-5.8 AAAAA  So. Sandwich Islands       

 

The strongest earthquake in the U.S. or Canada today was an M 3.8 in Southern Alaska. NEIC reported this earthquake of M 3.5-3.8 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Homer. The last earthquake within about 100 km of this epicenter with M>=3.8 was an M 4.0 on August 14, 2021 and an M 4.2 on June 28, 2021. The last earthquake of M>4.5 in the area was an M 4.8 on June 7, 2019, an aftershock of an M 5.8 on May 27, 2019. Forecast 136912 had expected a moderate earthquake in this area was likely around September 7.

 

O: 05SEP2021 16:42:01  59.0N  152.8W ML=3.3  EMSC   SOUTHERN ALASKA

O:  5SEP2021 12:28:10  59.3N  152.4W ML=3.8  EMSC   SOUTHERN ALASKA              

P:  7SEP2021 136912    60.1N  153.4W 3.2-5.2 AAAAA  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: 05SEP2021 07:44:53  51.3N   89.6E mb=4.3  EMSC   SOUTHWESTERN SIBERIA, RUSSIA

O:  5SEP2021 07:10:08  51.2N   89.4E mb=4.6  EMSC   SOUTHWESTERN SIBERIA, RUSSIA 

P:  7SEP2021 136861    46.0N   96.0E 4.0-5.7 ACCAA  Mongolia                   

 

INDONESIA AND PHILIPPINES

 

O:  5SEP2021 13:17:50   2.4N  128.4E ML=4.1  EMSC   HALMAHERA, INDONESIA         

P: 29AUG2021 136439     5.0N  127.0E 4.0-5.4 CCBAA  Halmahera                  

 

O:  5SEP2021 12:16:55   2.6S  127.6E mb=4.8  EMSC   CERAM SEA, INDONESIA         

P:  3SEP2021 136727     3.0S  128.0E 4.0-5.4 AAAAA  Ceram area                 

 

O:  5SEP2021 15:23:13   4.1N  126.8E mb=4.7  EMSC   KEPULAUAN TALAUD, INDONESIA  

O:  6SEP2021 05:42:22   5.5N  126.3E ML=4.6  EMSC   MINDANAO, PHILIPPINES        

P: 29AUG2021 136439     5.0N  127.0E 4.0-5.4 CAAAA  Halmahera                  

 

O:  5SEP2021 09:00:26   9.9N  122.1E mb=4.8  EMSC   NEGROS, PHILIPPINES          

P:  5SEP2021 136755    12.0N  121.0E 3.5-5.2 ACAAA  Luzon, Philippines         

 

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 (IV), Gacuyangan, Murcia, Imbang and Cebu.

 

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

 

CENTRAL AND SOUTH AMERICA

 

O:  6SEP2021 06:38     27.7S   69.7W mb=4.4  GUC    Atacama at Copiapo, Diego de A

P:  4SEP2021 136935    28.0S   67.0W 4.0-5.5 AABAA  Argentina                  

 

GUC repoted this earthquake was felt with intensity  III in  Atacama at Copiapo, Diego de Almagro and Tierra Amarilla and III in Coquimbo at La Higuera, Chile.

 

O:  5SEP2021 08:59:13   4.9S   80.8W ML=4.0  EMSC   PERU-ECUADOR BORDER REGION   

P:  5SEP2021 136728     4.0S   80.0W 4.0-5.6 AAAAA  Ecuador                    

 

O:  5SEP2021 22:22:24  11.5N   86.8W mb=4.2  EMSC   NEAR COAST OF NICARAGUA      

P:  1SEP2021 136763    11.0N   87.0W 3.5-5.3 BAAAA  Nicaragua                   

P:  3SEP2021 136763    12.0N   88.0W 3.5-5.5 AAAAA  Nicaragua                  

 

NEIC reported this earthquake of M 4.2 in Nicaragua was felt with intensity II-III in the area(s) of Nicaragua at Managua.

 

O:  5SEP2021 08:14:05  18.1N   68.5W ML=3.0  EMSC   MONA PASSAGE, DOMINICAN REPUBL

P:  6SEP2021 136770    19.0N   69.0W 3.4-5.3 AAAAA  Puerto Rico                

 

O: 05SEP2021 22:13:51  18.3N   73.7W ML=3.0  EMSC   HAITI REGION

O:  5SEP2021 09:09:11  18.3N   74.4W ML=3.9  EMSC   HAITI REGION                 

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 AAAAA  Puerto Rico                

 

O: 06SEP2021 03:53:03  18.9N   68.7W ML=3.3  EMSC   DOMINICAN REPUBLIC

O:  6SEP2021 04:38:05  19.0N   68.8W ML=3.3  EMSC   DOMINICAN REPUBLIC REGION    

P:  4SEP2021 136770    19.0N   68.0W 3.4-5.2 AAAAA  Puerto Rico                

 

O:  5SEP2021 12:25:39  20.2S   70.6W mb=4.5  EMSC   OFFSHORE TARAPACA, CHILE     

P:  6SEP2021 136935    21.0S   68.0W 4.0-5.8 AABAA  Argentina                  

 

NEIC reported this earthquake of M 4.1 in Tarapaca, Chile was felt with intensity II-III in the area(s) of Tarapaca, Chile at Iquique.

 

O:  5SEP2021 08:42:17  20.4N  109.1W mb=4.8  EMSC   REVILLA GIGEDO ISLANDS REGION

P:  6SEP2021 136778    20.0N  109.0W 3.5-5.0 AAAAA  Gulf of California         

 

O: 05SEP2021 11:07:43  21.7N  101.0W ML=4.3  EMSC   GUANAJUATO, MEXICO

O: 06SEP2021 04:49:49  21.7N  101.1W ML=4.4  EMSC   GUANAJUATO, MEXICO

O:  6SEP2021 02:31:16  21.6N  100.9W mb=4.4  EMSC   GUANAJUATO, MEXICO            

P:  7SEP2021 136767    18.0N  100.0W 3.5-5.5 ACAAA  Oaxaca, Mexico             

 

O:  5SEP2021 10:51:57  24.1S   67.4W mb=4.5  EMSC   SALTA, ARGENTINA             

P:  4SEP2021 136935    24.0S   64.0W 4.0-5.4 AACAA  Argentina                  

 

O:  6SEP2021 06:38:36  27.7S   69.0W mb=4.6  EMSC   CATAMARCA, ARGENTINA         

P:  4SEP2021 136935    28.0S   67.0W 4.0-5.5 AABAA  Argentina                  

 

O:  5SEP2021 15:05:12  29.9S   71.9W mb=4.3  EMSC   OFFSHORE COQUIMBO, CHILE     

P:  4SEP2021 136936    29.0S   72.0W 4.0-5.5 AAAAA  Coast Central Chile        

 

NEIC reported this earthquake of M 4.3 in Coquimbo, Chile was felt with intensity II-III in the area(s) of Santiago, Chile.

 

 

AFRICA AND EUROPE

 

O:  5SEP2021 21:27:52  36.0N   27.5E mb=4.1  EMSC   DODECANESE ISLANDS, GREECE   

P:  3SEP2021 136844    38.0N   28.0E 3.5-5.3 ABAAA  Turkey                     

 

NEIC reported this earthquake of M  4.1 in the Dodecanese Islands, Greece was felt with intensity II-III in the area(s) of the Dodecanese Islands, Greece at Lardos.

 

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

 

SOUTHWEST PACIFIC

 

O:  5SEP2021 20:29:26  12.5S  167.0E mb=4.4  EMSC   SANTA CRUZ ISLANDS           

P:  2SEP2021 136933    13.0S  167.0E 4.0-5.4 BAAAA  Vanuatu Islands            

 

O:  5SEP2021 12:52:23  14.7S  167.9E mb=4.8  EMSC   VANUATU                      

P: 10SEP2021 136933    14.0S  167.0E 4.0-5.5 BAAAA  Vanuatu Islands            

 

O:  6SEP2021 06:22:22  15.9S  166.5E Mw=4.8  EMSC   VANUATU                      

P:  9SEP2021 136934    16.0S  168.0E 4.0-5.4 BAAAA  Vanuatu Islands            

 

O:  5SEP2021 17:51:44  21.9S  174.7W Mw=5.9  EMSC   TONGA                        

P:  8SEP2021 136944    20.0S  175.0W 4.0-5.7 BBAAA  Tonga Islands              

P: 28AUG2021 136689    22.0S  175.0W 4.0-5.6 CAAAA  Tonga Islands              

 

 

OCEAN RIDGES

 

O:  6SEP2021 04:32:06  28.5S   12.7W mb=5.0  EMSC   SOUTHERN MID-ATLANTIC RIDGE  

 

O: 05SEP2021 13:47:43  58.6S   25.0W mb=4.6  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 09:59:01  58.7S   25.2W mb=5.4  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 10:17:53  58.8S   25.1W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 10:28:59  59.3S   25.3W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  5SEP2021 21:00:42  59.4S   25.8W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 AAAAA  So. Sandwich Islands       

P:  7SEP2021 136965    60.0S   29.0W 4.0-5.8 AAAAA  So. Sandwich Islands       

 

 

ZEALANDIA AND AUSTRALIA REGION

 

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

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

 

JAPAN AND KURIL ISLANDS

 

O:  5SEP2021 17:03:55  45.4N  149.6E mb=4.3  EMSC   KURIL ISLANDS                

P:  2SEP2021 136856    44.0N  147.0E 3.5-5.9 BBBAA  Hokkaido, Japan            

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 05SEP2021 17:24:14  31.4N  115.5W ML=3.1  EMSC   BAJA CALIFORNIA, MEXICO

O:  5SEP2021 09:38:57  31.3N  115.8W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    31.3N  116.3W 2.5-4.8 AAAAA  So. California             

 

O:  6SEP2021 02:01:51  36.0N  117.3W Ml=2.6  EMSC   CENTRAL CALIFORNIA           

P:  5SEP2021 136797    36.7N  117.2W 2.5-4.8 AAAAA  California/Nevada area     

 

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

 

O:  6SEP2021 00:01:43  36.1N  118.1W ML=2.7  EMSC   CENTRAL CALIFORNIA           

O:  5SEP2021 23:39:21  36.2N  118.1W ML=3.1  EMSC   CENTRAL CALIFORNIA           

P:  9SEP2021 136796    36.1N  118.1W 2.5-4.6 BAAAA  California/Nevada area     

 

O:  5SEP2021 15:31:54  38.4N  119.6W Md=2.3  EMSC   CENTRAL CALIFORNIA           

P:  4SEP2021 136801    38.3N  119.3W 2.5-4.5 AAAAA  California/Nevada area     

 

O:  5SEP2021 21:06:24  38.8N  122.8W Md=2.3  EMSC   NORTHERN CALIFORNIA          

P:  6SEP2021 136806    38.8N  122.8W 2.5-4.5 AAAAA  Central California         

 

 

ALASKA

 

O:  5SEP2021 14:55:22  56.2N  153.0W ML=3.3  EMSC   KODIAK ISLAND REGION, ALASKA 

P:  6SEP2021 136891    55.0N  150.9W 3.5-5.1 ABBAA  South of Alaska            

 

O: 05SEP2021 16:42:01  59.0N  152.8W ML=3.3  EMSC   SOUTHERN ALASKA

O:  5SEP2021 12:28:10  59.3N  152.4W ML=3.8  EMSC   SOUTHERN ALASKA              

P:  7SEP2021 136912    60.1N  153.4W 3.2-5.2 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: 05SEP2021 18:45:03  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS

O: 06SEP2021 03:44:36  31.7N  104.4W ML=2.7  EMSC   WESTERN TEXAS

O: 06SEP2021 03:50:55  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS

O: 06SEP2021 04:38:36  31.7N  104.4W ML=3.4  EMSC   WESTERN TEXAS

O:  5SEP2021 18:45:03  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS                

P:  3SEP2021 136827    32.5N  104.6W 2.0-3.9 AAAAA  SW U.S.A                   

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

EASTERN U.S./CANADA

 

O:  5SEP2021 10:48:40  36.1N   89.7W Md=2.3  EMSC   SOUTHEASTERN MISSOURI        

P:  6SEP2021 136818    37.0N   90.0W 2.0-4.1 AAAAA  New Madrid area            

 

O:  6SEP2021 00:50:44  36.5N   98.5W ML=2.2  EMSC   OKLAHOMA                     

P:  8SEP2021 136843    37.0N   98.0W 2.0-4.4 AAAAA  Southern Plains            

 

HAWAII

 

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

 

UNUSUAL HIGH LATITUDE QUAKES ASSOCIATED WITH EARLIER GEOMAGNETIC STORM

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 4, 2021

 

The strongest earthquake in the U.S. or Canada was an M 4.4 in Baffin Bay. While an M 3.3 hit near this epicenter on September 1, 2021, the last event in the region within about 200 km with M>=4.4 since an M 4.6 on October 22, 2019 and an M 4.6 on May 22, 2017. These may be regional aftershocks of an M 6.0 in the area on July 7, 2009.  This may have been promoted by the recent geomagnetic storm which would have preferentially enhanced seismicity at high latitudes such as in the South Sandwich Islands and Baffin Bay, Canada as noted in earlier summaries:

 

"This geomagnetic storm is expected to continue through the end of August and may enhance global seismicity especially at high latitudes " (August 31, 2021)

 

O:  4SEP2021 18:58:14  73.3N   73.0W mb=4.4  EMSC   BAFFIN BAY                   

 

The strongest earthquake in the world today was once again in the South Sandwich Islands.  Forecast 136964 had expected this event within about 50 km in early September. It is an aftershock of the M 8.1 of August 12, 2021 and continues a slowly declining aftershock sequence.

 

O: 04SEP2021 13:55:59  58.1S   25.3W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 02:03:21  58.7S   23.9W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 04SEP2021 16:13:02  58.9S   25.3W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 04SEP2021 07:44:28  59.0S   25.5W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  5SEP2021 05:26:32  56.8S   25.8W Mw=5.5  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 BAAAA  So. Sandwich Islands       

 

An unusual earthquake of M 4.5 occurred today in the Madeira Islands southwest of Portugal. It was not reported felt in this area. The last such earthquakes in the Madeira Islands occurred as M 4.7 events on January 1, 2021 and January 30, 2021.

 

O:  5SEP2021 06:10:44  32.6N   17.3W mb=4.5  EMSC   MADEIRA ISLANDS, PORTUGAL REGI

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:  4SEP2021 12:05:17  26.5N   96.5E mb=4.5  EMSC   MYANMAR                       

P:  6SEP2021 136784    25.0N   97.0E 4.0-5.5 ABAAA  Myanmar                    

 

O:  5SEP2021 02:52:54  28.3N   88.1E ML=4.3  EMSC   WESTERN XIZANG               

P:  4SEP2021 136851    30.0N   88.0E 3.8-5.6 ABAAA  Xizang                     

 

O:  4SEP2021 14:16:46  37.5N   72.3E mb=4.1  EMSC   TAJIKISTAN                   

P:  2SEP2021 136812    36.0N   71.0E 3.8-5.5 ABAAA  Hindu Kush/Pakistan        

P:  8SEP2021 136812    37.0N   71.0E 3.8-5.4 BAAAA  Hindu Kush/Pakistan        

 

O:  4SEP2021 17:52:07  37.8N   77.9E mb=4.6  EMSC   SOUTHERN XINJIANG, CHINA     

P:  4SEP2021 136823    39.0N   77.0E 3.8-5.2 ABAAA  Northern India             

 

INDONESIA AND PHILIPPINES

 

O:  4SEP2021 15:52:48   0.2S  124.5E mb=4.7  EMSC   MOLUCCA SEA                   

P:  5SEP2021 136719     0.0N  123.0E 4.0-5.5 AABAA  Mindanao, Philippines      

P:  6SEP2021 136741     2.0S  124.0E 4.0-5.4 ABAAA  Sulawesi area              

 

O:  4SEP2021 12:23:17   1.5N  119.8E ML=4.0  EMSC   MAKASSAR STRAIT, INDONESIA   

P:  3SEP2021 136713     0.0N  122.0E 4.0-5.6 ABBAA  Celebes Sea                

P: 26AUG2021 136434     1.0N  120.0E 4.0-5.4 CAAAA  Celebes Sea                

 

O:  5SEP2021 01:40:10   2.1S   99.6E mb=4.9  EMSC   KEP. MENTAWAI REGION, INDONESI

P: 10SEP2021 136739     2.0S  101.0E 4.0-5.6 BABAA  So. of Sumatera            

 

O:  4SEP2021 23:41:38   5.5S  154.2E mb=5.0  EMSC   BOUGAINVILLE REGION, P.N.G.  

O:  4SEP2021 18:43:41   6.4S  154.9E Mw=5.3  EMSC   BOUGAINVILLE REGION, P.N.G.  

P:  7SEP2021 136732     6.0S  154.0E 4.0-5.4 BAAAA  New Britain                

 

NEIC reported this earthquake of M 5.3 in Bougainville, New Guinea was felt with intensity II-III in the area(s) of New Guinea at Arawa and Bulcio Morobe.

 

O:  5SEP2021 01:08:53   6.3S  130.1E mb=4.3  EMSC   BANDA SEA                    

O:  5SEP2021 04:47:55   7.3S  128.4E ML=4.6  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P:  9SEP2021 136724     7.0S  128.0E 4.0-5.4 BAAAA  Banda Sea                  

 

O:  4SEP2021 07:29:02   9.5S  113.0E mb=4.9  EMSC   SOUTH OF JAVA, INDONESIA     

P:  2SEP2021 136737     9.0S  113.0E 4.0-5.7 AAAAA  So. of Bali                

 

NEIC reported this earthquake of M 4.9 south of Java  was felt with intensity II-III in the area(s) of Java at Malang.

 

O:  4SEP2021 23:03:08  12.2N  144.2E Mw=5.3  EMSC   GUAM REGION                  

P:  5SEP2021 136772    12.0N  141.0E 4.0-5.8 AACAA  So. Marianas/Guam          

P:  9SEP2021 136772    13.0N  144.0E 4.0-5.4 BAAAA  So. Marianas/Guam          

 

NEIC reported this earthquake of M 5.3 in Guam was felt with intensity II-III in the area(s) of Guam at Tamuning.

 

 

CENTRAL AND SOUTH AMERICA

 

O:  4SEP2021 09:48:30  10.6N   83.1W ML=4.3  EMSC   COSTA RICA                   

P:  2SEP2021 136745    10.0N   84.0W 3.5-5.1 AAAAA  Caribbean Sea              

 

O:  4SEP2021 14:40:00  12.6N   86.4W ML=4.0  EMSC   NICARAGUA                    

P:  3SEP2021 136763    12.0N   88.0W 3.5-5.5 AABAA  Nicaragua                  

 

O:  4SEP2021 15:30:39  15.6N   96.1W ML=4.3  EMSC   OFFSHORE OAXACA, MEXICO      

P:  5SEP2021 136766    16.0N   96.0W 3.5-5.5 AAAAA  Oaxaca, Mexico             

 

O:  4SEP2021 09:07:31  15.8S   72.1W mb=4.3  EMSC   SOUTHERN PERU                

P:  3SEP2021 136929    16.0S   74.0W 4.0-5.8 AABAA  So. Peru/Bolivia            

 

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 Arequipa.

 

O: 04SEP2021 22:50:35  18.4N   71.2W ML=3.5  EMSC   DOMINICAN REPUBLIC

O: 04SEP2021 22:36:40  18.5N   73.5W ML=3.5  EMSC   HAITI REGION

O: 04SEP2021 22:36:40  18.5N   73.5W ML=3.5  EMSC   HAITI REGION

O:  4SEP2021 15:39:29  18.4N   73.7W ML=3.6  EMSC   HAITI REGION                 

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 BAAAA  Puerto Rico                

 

O: 04SEP2021 16:30:58  19.0N   66.6W Md=3.4  EMSC   PUERTO RICO REGION

O: 05SEP2021 05:25:58  19.0N   65.3W ML=3.2  EMSC   PUERTO RICO REGION

O:  4SEP2021 12:56:03  19.1N   66.6W Md=3.1  EMSC   PUERTO RICO REGION           

P:  6SEP2021 136768    18.0N   67.0W 3.4-5.4 ABAAA  Puerto Rico                

 

O:  4SEP2021 22:49:44  19.6N  108.5W ML=4.3  EMSC   REVILLA GIGEDO ISLANDS REGION

P:  6SEP2021 136778    20.0N  109.0W 3.5-5.0 AAAAA  Gulf of California         

 

O:  4SEP2021 17:50:18  25.8N  100.4W ML=3.9  EMSC   NUEVO LEON, MEXICO           

O: 04SEP2021 09:38:27  21.6N  101.2W mb=4.1  EMSC   GUANAJUATO, MEXICO

O: 04SEP2021 09:55:37  21.6N  101.1W ML=3.6  EMSC   GUANAJUATO, MEXICO

O: 04SEP2021 20:15:15  21.6N  101.1W ML=3.7  EMSC   GUANAJUATO, MEXICO

O: 04SEP2021 09:46:29  21.7N  101.0W ML=3.6  EMSC   GUANAJUATO, MEXICO

O: 04SEP2021 10:35:30  21.7N  101.0W ML=4.3  EMSC   GUANAJUATO, MEXICO

O:  4SEP2021 21:12:07  21.5N  101.1W ML=3.8  EMSC   GUANAJUATO, MEXICO           

P:  2SEP2021 136759    18.0N  101.0W 3.5-5.1 ACAAA  Michoacan, Mexico          

 

NEIC reported this earthquake of M 4.0 in Guanajuato at Leon Allende, Escalerilla San Luis Potosi and Tlalnepantla. was felt with intensity II-III in the area(s) of 

 

O:  4SEP2021 08:25:32  24.0S   66.9W mb=4.2  EMSC   JUJUY, ARGENTINA             

P:  4SEP2021 136935    24.0S   64.0W 4.0-5.4 AACAA  Argentina                  

 

AFRICA AND EUROPE

 

O:  5SEP2021 02:50:04  35.5N    3.6W ML=3.3  EMSC   STRAIT OF GIBRALTAR          

P:  7SEP2021 136816    35.0N    4.0W 3.5-5.3 AAAAA  Morocco/Spain              

 

O:  4SEP2021 10:29:13  36.7N    4.6W mb=3.3  EMSC   STRAIT OF GIBRALTAR          

P: 29AUG2021 136541    37.0N    4.0W 3.5-5.1 BAAAA  Morocco/Spain              

 

O:  5SEP2021 06:10:44  32.6N   17.3W mb=4.5  EMSC   MADEIRA ISLANDS, PORTUGAL REGI

 

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

 

SOUTHWEST PACIFIC

 

O:  4SEP2021 07:53:50  17.3S  167.8E Mw=5.1  EMSC   VANUATU                      

P: 29AUG2021 136676    18.0S  168.0E 4.0-5.6 BAAAA  Vanuatu Islands            

 

O:  5SEP2021 01:17:05  20.9S  178.7W mb=4.2  EMSC   FIJI REGION                  

P:  4SEP2021 136944    23.0S  177.0W 4.0-5.6 ACBAA  Tonga Islands              

 

OCEAN RIDGES

 

O: 04SEP2021 13:55:59  58.1S   25.3W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 05SEP2021 02:03:21  58.7S   23.9W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 04SEP2021 16:13:02  58.9S   25.3W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 04SEP2021 07:44:28  59.0S   25.5W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  5SEP2021 05:26:32  56.8S   25.8W Mw=5.5  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  9SEP2021 136964    57.0S   25.0W 4.0-5.6 BAAAA  So. Sandwich Islands       

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  5SEP2021 05:09:16  32.5S  179.0W Mw=5.3  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 27AUG2021 136699    32.0S  180.0W 4.0-5.4 CAAAA  So. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O:  4SEP2021 07:30:22  28.3N  139.3E mb=4.2  EMSC   BONIN ISLANDS, JAPAN REGION  

P:  4SEP2021 136776    28.0N  142.0E 4.0-5.6 AABAA  Bonin Islands              

 

O:  5SEP2021 05:48:58  41.3N  142.6E mb=4.5  EMSC   HOKKAIDO, JAPAN REGION       

P:  8SEP2021 136856    42.0N  143.0E 3.5-5.5 BAAAA  Hokkaido, Japan            

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  4SEP2021 17:28:01  31.8N  116.3W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO      

P:  7SEP2021 136830    31.3N  116.3W 2.5-4.8 BAAAA  So. California             

 

O:  4SEP2021 13:09:51  33.3N  118.0W Ml=2.1  EMSC   GULF OF SANTA CATALINA, CALIF.

P:  6SEP2021 136833    33.7N  117.5W 2.5-4.6 AAAAA  So. California             

 

O:  4SEP2021 16:34:09  35.3N  121.0W Md=2.3  EMSC   OFFSHORE CENTRAL CALIFORNIA  

P:  3SEP2021 136826    35.6N  121.3W 2.5-4.8 AAAAA  Off So. California         

 

O:  4SEP2021 16:01:59  35.5N  118.4W Ml=2.2  EMSC   CENTRAL CALIFORNIA           

P:  5SEP2021 136838    35.6N  118.4W 2.5-4.4 AAAAA  So. California             

 

O:  4SEP2021 07:28:42  35.7N  117.5W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P:  5SEP2021 136836    35.0N  117.7W 2.5-4.4 AAAAA  So. California             

 

O:  4SEP2021 16:15:13  37.0N  121.6W Md=2.2  EMSC   NORTHERN CALIFORNIA          

P:  5SEP2021 136805    37.4N  121.8W 2.5-4.4 AAAAA  Central California         

 

O:  4SEP2021 10:19:07  38.1N  118.3W ML=3.2  EMSC   NEVADA                       

P:  6SEP2021 136801    38.6N  118.6W 2.5-4.8 AAAAA  California/Nevada area     

 

O:  5SEP2021 05:27:45  39.1N  123.1W ML=3.2  EMSC   NORTHERN CALIFORNIA           

O:  5SEP2021 05:27:45  39.1N  123.1W ML=3.7  ANSS   NORTHERN CALIFORNIA          

P:  7SEP2021 136807    39.0N  123.1W 2.5-4.4 AAAAA  Central California         

 

NEIC reported this earthquake of M 3.7 in Northern California was felt with intensity II-III in the area(s) of Northern California at Ukiah, Lakeport, Upper Lake, Hopland, Nice, Boonville, Potter Valley, Willits and Clearlake.

 

 

ALASKA

 

O: 04SEP2021 14:23:56  55.2N  156.8W ML=3.5  EMSC   SOUTH OF ALASKA

O: 04SEP2021 16:01:41  55.3N  157.5W ML=3.1  EMSC   ALASKA PENINSULA

O: 05SEP2021 05:06:43  56.5N  155.7W ML=3.7  EMSC   ALASKA PENINSULA

O:  5SEP2021 00:34:24  54.8N  155.0W ML=3.3  EMSC   SOUTH OF ALASKA              

P:  2SEP2021 136890    54.7N  156.9W 3.5-5.1 BABAA  Alaska Peninsula            

 

O:  4SEP2021 19:31:27  54.2N  153.2W ML=3.3  EMSC   SOUTH OF ALASKA              

P:  6SEP2021 136891    55.0N  150.9W 3.5-5.1 AABAA  South of Alaska            

 

O:  4SEP2021 21:22:57  54.6N  161.4W ML=3.0  EMSC   ALASKA PENINSULA              

P: 10SEP2021 136908    54.3N  161.4W 3.5-5.1 CAAAA  Unimak Islands, Aleutians  

 

O:  4SEP2021 11:55:37  60.8N  147.7W ML=3.4  EMSC   SOUTHERN ALASKA              

P:  4SEP2021 136913    61.4N  146.5W 3.2-4.9 AAAAA  Central Alaska             

 

O:  5SEP2021 06:21:25  61.6N  150.0W ML=3.3  EMSC   SOUTHERN ALASKA              

P:  4SEP2021 136912    60.8N  151.7W 3.2-5.5 AAAAA  Central Alaska             

 

O: 05SEP2021 04:16:00  60.0N  140.2W ml=3.4  EMSC   SOUTHEASTERN ALASKA

O: 05SEP2021 04:29:05  60.0N  140.1W ml=3.3  EMSC   SOUTHEASTERN ALASKA

O: 05SEP2021 04:50:24  60.0N  140.2W ml=3.4  EMSC   SOUTHERN YUKON TERRITORY, CANADA

O: 05SEP2021 01:26:51  60.1N  140.4W ML=3.1  EMSC   SOUTHERN YUKON TERRITORY, CANADA

O:  5SEP2021 02:54:21  60.0N  140.1W ml=3.5  EMSC   SOUTHERN YUKON TERRITORY, CANA

P:  5SEP2021 136907    59.0N  139.0W 3.0-4.6 AAAAA  Southeast Alaska           

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  4SEP2021 20:57:27  44.2N  129.0W mb=4.0  EMSC   OFF COAST OF OREGON          

P:  6SEP2021 136875    44.4N  129.3W 3.0-4.8 AAAAA  Off Coast of Oregon        

 

NEIC reported this earthquake of M 4.0 off the coast of Oregon  was felt with intensity II-III in the area(s) of Oregon at Cloverdale, Monroe, McMinnville, Salem, Portland and in Peshastin, Washington.

 

ROCKY MOUNTAINS REGION

 

O: 04SEP2021 11:56:06  31.7N  104.0W ML=2.5  EMSC   WESTERN TEXAS

O:  4SEP2021 23:08:12  31.0N  103.5W ML=2.7  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

O:  4SEP2021 13:02:59  44.6N  112.0W ML=2.2  EMSC   WESTERN MONTANA              

P:  2SEP2021 136889    44.2N  110.3W 2.0-4.0 AABAA  Yellowstone/Wyoming        

 

O:  4SEP2021 13:41:36  47.4N  113.1W Ml=2.4  EMSC   WESTERN MONTANA              

P:  7SEP2021 136863    47.7N  117.4W 2.0-4.1 BACAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

 

O:  3SEP2021 04:55:24  45.7N   74.8W MB=1.8  ECAN L'Orignal, ON                  

P:  4SEP2021 136867    45.0N   74.0W 2.0-4.3 AAAAA  New York State             

 

O:  4SEP2021 18:58:14  73.3N   73.0W mb=4.4  EMSC   BAFFIN BAY                   

 

O:  4SEP2021 21:17:54  35.0N   97.8W mb=2.9  EMSC   OKLAHOMA                     

P:  2SEP2021 136843    35.0N   97.0W 2.0-4.3 AAAAA  Southern Plains            

 

NEIC reported this earthquake of M 3.3 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Alex, Bradley, Blanchard and Purcel.

 

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.

 

QUAKES IN NORTH ISLAND, NEW ZEALAND; ANTIPODAL AREAS OF OKHOTSK AND SOUTH SANDWICH IS   

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 3, 2021

 

An earthquake of M 5.0 was widely felt in the Hastings area of North Island, New Zealand today. NEIC reported it was felt with maximum intensity V in New Zealand in Otane, Hastings, Hawke's Bay and IV in Waipukurau, Dannevirke, Napier, Palmersont North and II-III in Ohakune, Wairoa, Turngi and Masterton, New Zealand. GEONET reported this earthquake was felt with moderate intensity in southeastern North Island. More than 6154 people reported feeling this earthquake. Light to moderate intensity was reported throughout much of southern and eastern North Island and northern South Island. 1513 reports of weak intensity;  2970 of light intensity; 1470 with moderate; 184 with strong shaking and 6 with severe and 11 with extreme intensity. This is the strongest earthquake in North Island within about 200 km of this epicenter since an M 5.9 on November 22, 2016. Forecasts 136957 and 136702 had expected this activity was likely within this range at the end of August or in early September, 2021.

 

 

O: 04SEP2021 04:54:27  40.0S  176.6E MS=4.9  GEONET Felt with moderate intensity

O:  4SEP2021 04:54:26  40.0S  176.7E mb=5.0  EMSC   NORTH ISLAND OF NEW ZEALAND  

P:  1SEP2021 136957    40.0S  174.0E 3.0-4.4 BABAA  North Island, N.Z.         

P: 28AUG2021 136702    40.0S  175.0E 3.0-4.4 CABAA  North Island, N.Z.         

 

The strongest earthquakes in the world today occurred at the near-antipodal areas of the South Sandwich Islands (M 5.7) and the Sea of Okhotsk, Russia (M 5.8). The earthquake in the South Sandwich Islands is not surprising as earthquakes of this size have occurred almost daily since the M 8.1 there on August 12, 2021. It was accompanied by aftershocks of M 4.5 and 4.7. Forecast 136964 had expected this event within about 100 km was likely around September 7. 

 

O: 03SEP2021 16:50:32  57.9S   24.8W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 03SEP2021 18:14:59  58.5S   25.6W mb=4.5  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  3SEP2021 07:49:43  59.9S   26.7W Mw=5.7  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 BAAAA  So. Sandwich Islands       

 

The earthquake of M 5.8 in the Sea of Okhotsk was reported lightly felt in this area. It occurred in the antipodal area of the South Sandwich Islands and was probably promoted by strong energy from that source. A possible precursory earthquake hit the area yesterday and was commented on in the previous summary as:

 

"The strongest earthquake felt in the world today was an M 5.2 northwest of the Kuril Islands. It was not reported felt in this region. The last earthquake of M>=5.2 within about 200 km of this epicenter was an M 5.4 on September 18, 2014 and prior to that an M 5.2 on July 9, 2008. An M 6.7 hit about 200 km northeast of today's epicenter on May 24, 2013. The event in 2013 followed an M 8.3 in the Sea of Okhotsk earlier on that date. At the time of that event, this summary noted:

 

"A great earthquake of M 8.2-8.3 hit deep under Kamchatka and the Sea of

Okhotsk, Russia today. It was preceded by major earthquakes in Northern California (M 5.7) and Tonga (M 7.4). While it was too deep to have triggered a significant tsunami, it was felt throughout the northwestern Pacific rim. Because of its size and great depth it was felt as far as Moscow, 7,000 km to the west where shaking caused evacuation of some office buildings and people fled into the streets/" (May 24, 2013)

 

These areas show deep focus earthquakes and may help trigger each other." (September 3, 2021)

 

This earthquake in the Sea of Okhotsk is the strongest within about 200 km of this epicenter in at least 30 years - since 1990. Forecast 136640 had expected enhanced seismicity in this area within about 100 km of today's epicenter was likely around August 29. This epicenter is at 103 degrees from the M 7.2 in Haiti of  August 14 and was probably promoted by strong seismic energy from that source.

 

 

O:  3SEP2021 10:14:25  49.5N  147.0E Mw=5.8  EMSC   SEA OF OKHOTSK               

P: 29AUG2021 136640    50.0N  148.0E 4.0-5.4 BAAAA  Sakhalin                   

 

MODERATE QUAKES UNDER WORLD'S OCEANS

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 2, 2021

 

A series of moderately large earthquake hit under the world's oceans today. None of these were reported felt. The largest was an M 5.6 in the South Sandwich Islands but activity also continued in the Scotia Sea following a moderate quake in that area yesterday. An earthquake of M 4.6 in the Azores was the strongest within about 200 km of this epicenter since an M 4.8 on July 24, 2021 - the largest in the past year. This area may have been promoted by energy from the South Sandwich Islands as it is located at 103 degrees from those epicenters - a distance at which strong energy concentration occurs on the earth's surface following major earthquakes.

 

O:  2SEP2021 14:17:56  42.0N   29.4W mb=4.6  EMSC   AZORES ISLANDS REGION        

P:  8SEP2021 136869    41.0N   30.0W 4.0-5.8 CAAAA  No. Mid-Atlantic Ridge     

 

Many of these events occurred near local solar midnight or local solar noon and were probably promoted by high tidal stresses which maximize near this hour. These included the events in the East Pacific Rise (local midnight); the Azores (local noon) and the South Sandwich Islands (local midnight).

 

An M 5.4 also occurred in the Southeast Pacific Rise west of Central Chile.  The last similar activity within about 250 km of the events in the Southern East Pacific  Rise as an M 5.8 on December 25, 2019 and an M 5.4 on May 4, 2019 following a lull from 2014 to 2019. Forecast 136940 had expected today's activity within about 100 km of today's Pacific Rise activity in early September. This activity is at the fifth node (72 degrees) from the M 6.9 in the Vanuatu Islands and at the sixth node (60 degrees) from the Haiti quake of August 14 and was probably promoted by energy from those sources.

 

O: 03SEP2021 05:40:10  24.5S  116.1W mb=4.8  EMSC   SOUTHERN EAST PACIFIC RISE

O:  3SEP2021 05:22:57  24.3S  116.0W Mw=5.4  EMSC   SOUTHERN EAST PACIFIC RISE   

P:  8SEP2021 136940    24.0S  115.0W 4.0-5.6 BAAAA  So. East Pacific Rise      

 

O:  2SEP2021 17:58:55  60.4S   48.8W mb=4.7  EMSC   SCOTIA SEA                   

 

O: 02SEP2021 08:47:25  58.9S   25.5W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 02SEP2021 12:01:52  59.2S   24.9W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 03SEP2021 00:56:41  59.4S   25.7W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  3SEP2021 00:06:16  58.8S   25.8W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 BAAAA  So. Sandwich Islands       

 

The strongest earthquake felt in the world today was an M 5.2 northwest of the Kuril Islands. It was not reported felt in this region. The last earthquake of M>=5.2 within about 200 km of this epicenter was an M 5.4 on September 18, 2014 and prior to that an M 5.2 on July 9, 2008. An M 6.7 hit about 200 km northeast of today's epicenter on May 24, 2013. The event in 2013 followed an M 8.3 in the Sea of Okhotsk earlier on that date. At the time of that event, this summary noted:

 

"A great earthquake of M 8.2-8.3 hit deep under Kamchatka and the Sea of

Okhotsk, Russia today. It was preceded by major earthquakes in Northern California (M 5.7) and Tonga (M 7.4). While it was too deep to have triggered a significant tsunami, it was felt throughout the northwestern Pacific rim. Because of its size and great depth it was felt as far as Moscow, 7,000 km to the west where shaking caused evacuation of some office buildings and people fled into the streets/" (May 24, 2013)

 

These areas show deep focus earthquakes and may help trigger each other. Forecast 136640 expected today's activity in this area was likely around August 29.

 

O:  2SEP2021 20:26:14  50.5N  150.5E Mw=5.2  EMSC   NORTHWEST OF KURIL ISLANDS   

P: 29AUG2021 136640    50.0N  148.0E 4.0-5.4 BABAA  Sakhalin                    

 

A moderate earthquake of M 4.8 shook the Caucasus region of Russia today. NEIC reported this earthquake of M 4.8 in the Caucasus, Russia was felt with intensity II-III in the area(s) of  Georgia at Telari, Kakheti and Tbilisi.

The last earthquake within about 200 km of this epicenter with larger magnitude was an M 4.9 on August 10, 2019 and an M 5.3 on June 5, 2018. Forecast 136846 had expected activity to the south of this around September 3.

 

O:  3SEP2021 03:34:49  42.4N   46.1E mb=4.8  EMSC   CAUCASUS REGION, RUSSIA      

P:  3SEP2021 136846    38.0N   44.0E 3.5-5.0 ACBAA  Turkey                     

 

The strongest earthquakes in the U.S. or Canada today were an M 4.6 south of Alaska in the Alaska Peninsula area and an M 4.7 in the Unimak Island region of Alaska. These events were not reported felt in the area. The M 4.7 in the Unimak Island area was the strongest in that region since an M 5.1 on January 11, 2021.  Forecast 136908 had expected enhanced seismicity in the Unimak Islands was likely around September 2.

 

O:  3SEP2021 03:55:44  53.5N  163.6W mb=4.7  EMSC   UNIMAK ISLAND REGION, ALASKA 

P:  2SEP2021 136908    54.6N  163.6W 3.5-5.0 ABAAA  Unimak Islands, Aleutians  

 

The earthquake of M 4.6 South of Alaska was the strongest within about 150 km  of that epicenter since an M 6.1 on July 29, 2021. Forecast 136890 had expected enhanced seismicity in this area was likely around September 2.

 

O:  2SEP2021 08:08:34  54.5N  159.7W mb=4.6  EMSC   SOUTH OF ALASKA              

P:  2SEP2021 136890    54.7N  156.9W 3.5-5.1 AABAA  Alaska Peninsula           

 

An M 4.2 in western Texas today was accompanied by a strong series of foreshocks and aftershocks.  NEIC reported this earthquake of M 4.2 in Western Texas was felt with intensity II-III in the area(s) of New Mexico at Carlsbad, Artesia, Alamogordo, Roswell, Capitan. Several aftershocks were felt lightly in Roswell, New Mexico.  This area has seen a long series of moderate earthquakes this year including events of M 4.3, 4.4 and 4.5 on March 17, 2021, June 25, 2021 and July 28, 2021. This series began with an M 5.0 on March 26, 2021 after nine years of quiet at this magnitude in the area. Forecast 136827 had expected enhanced seismicity in this area was likely around September 3.

 

O: 02SEP2021 07:23:05  31.7N  104.4W ML=2.0  EMSC   WESTERN TEXAS

O: 02SEP2021 09:37:00  31.7N  104.0W ML=2.4  EMSC   WESTERN TEXAS

O: 02SEP2021 12:20:45  31.7N  104.4W ML=2.1  EMSC   WESTERN TEXAS

O: 03SEP2021 00:42:59  31.7N  104.4W ML=3.4  EMSC   WESTERN TEXAS

O: 03SEP2021 01:31:49  31.7N  104.4W ML=3.0  EMSC   WESTERN TEXAS

O: 03SEP2021 05:41:14  31.7N  104.4W ML=4.2  EMSC   WESTERN TEXAS

O: 03SEP2021 05:45:49  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS

O:  3SEP2021 06:29:06  31.7N  104.4W ML=2.6  EMSC   WESTERN TEXAS                

P:  3SEP2021 136827    32.5N  104.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

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:  2SEP2021 10:57:02  23.2N  120.6E mb=4.3  EMSC   TAIWAN                       

P:  6SEP2021 136791    23.0N  123.0E 4.0-5.4 BABAA  Taiwan                     

 

NEIC reported this earthquake of M 4.3 in Taiwan was felt with intensity V in the area(s) of Taiwan at Chichi, Nantou.

 

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

 

INDONESIA AND PHILIPPINES

 

O:  2SEP2021 09:34:18   0.5N   99.2E ML=3.9  EMSC   NORTHERN SUMATRA, INDONESIA  

P:  2SEP2021 136722     0.0N   98.0E 4.0-5.4 AABAA  So. Sumatera               

 

O:  2SEP2021 14:15:56   4.7S  102.5E mb=4.6  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  1SEP2021 136739     6.0S  104.0E 4.0-5.6 ABBAA  So. of Sumatera             

 

O:  2SEP2021 07:23:32  11.6N  124.4E mb=4.7  EMSC   LEYTE, PHILIPPINES           

P: 24AUG2021 136481    12.0N  124.0E 3.5-5.2 CAAAA  Luzon, Philippines         

 

NEIC reported this earthquake of M 4.7 in Leyte, Philippines was felt with intensity II-III in the area(s) of Leyte, Philippines with VI in Almeria, Eastern Visayas and Leyte and San Antonio iBasey.

 

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

 

CENTRAL AND SOUTH AMERICA

 

O:  2SEP2021 20:34:47   2.1S   77.7W ML=4.3  EMSC   PERU-ECUADOR BORDER REGION   

P:  5SEP2021 136728     1.0S   78.0W 4.0-5.8 BBAAA  Ecuador                    

 

O:  2SEP2021 08:42:17   3.8S   76.3W Mw=4.9  EMSC   NORTHERN PERU                

P: 31AUG2021 136450     4.0S   80.0W 4.0-5.5 AACAA  Ecuador                    

 

O:  3SEP2021 01:25:51  13.3N   89.7W mb=4.4  EMSC   OFFSHORE EL SALVADOR         

P:  7SEP2021 136751    14.0N   90.0W 3.5-5.3 BAAAA  Guatemala                  

 

NEIC reported this earthquake of M 4.4 in El Salvador was felt with intensity II-III in the area(s) of El Salvador at Antiguo Cuscatlan, La Libertad.

 

O:  3SEP2021 05:06:22  14.4S   76.5W Mw=5.0  EMSC   NEAR COAST OF CENTRAL PERU   

P: 31AUG2021 136663    15.0S   76.0W 4.0-5.4 BAAAA  Central Peru               

 

O:  2SEP2021 14:41:33  15.1N   93.3W ML=4.0  EMSC   OFFSHORE CHIAPAS, MEXICO     

P:  5SEP2021 136746    15.0N   94.0W 3.5-5.1 BAAAA  Chiapas, Mexico            

 

O:  3SEP2021 03:19:26  16.7N   94.0W ML=4.1  EMSC   CHIAPAS, MEXICO              

P:  4SEP2021 136747    17.0N   95.0W 3.5-5.5 AAAAA  Chiapas, Mexico            

 

O:  3SEP2021 01:32:42  17.0N  100.1W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO    

P:  4SEP2021 136767    17.0N  100.0W 3.5-5.5 AAAAA  Oaxaca, Mexico              

 

O:  2SEP2021 11:44:24  17.3N   95.1W ML=4.1  EMSC   OAXACA, MEXICO               

O:  2SEP2021 07:42:49  17.4N   94.9W ML=4.0  EMSC   VERACRUZ, MEXICO             

P:  4SEP2021 136747    17.0N   95.0W 3.5-5.5 AAAAA  Chiapas, Mexico             

 

O:  3SEP2021 02:45:46  17.9N   66.9W Md=3.0  EMSC   PUERTO RICO REGION           

P:  4SEP2021 136768    18.0N   66.0W 3.4-5.5 AAAAA  Puerto Rico                

 

O:  2SEP2021 07:33:03  18.5N   73.6W ML=3.2  EMSC   HAITI REGION                 

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 BAAAA  Puerto Rico                

 

O:  2SEP2021 19:36:30  19.6N   70.7W ML=3.0  EMSC   DOMINICAN REPUBLIC           

P:  5SEP2021 136771    19.0N   71.0W 3.4-5.3 BAAAA  Puerto Rico                

 

O:  3SEP2021 00:37:46  27.1N  108.4W ML=4.0  EMSC   CHIHUAHUA, MEXICO            

P: 29AUG2021 136501    24.0N  109.0W 3.5-4.9 BCAAA  Gulf of California         

P: 29AUG2021 136502    28.0N  112.0W 3.5-4.9 BACAA  Gulf of California         

 

O:  2SEP2021 15:25:06  32.1S   72.8W mb=4.7  EMSC   OFF COAST OF VALPARAISO, CHILE

P:  5SEP2021 136948    33.0S   72.0W 4.0-5.6 BAAAA  Central Chile              

 

 

AFRICA AND EUROPE

 

O:  2SEP2021 21:12:52  36.4N   27.1E ML=4.1  EMSC   DODECANESE IS.-TURKEY BORDER R

P: 28AUG2021 136516    37.0N   27.0E 3.0-4.8 BAAAA  Aegean Sea                 

P: 28AUG2021 136578    36.0N   28.0E 3.5-5.3 BAAAA  Turkey                     

 

O:  3SEP2021 03:34:49  42.4N   46.1E mb=4.8  EMSC   CAUCASUS REGION, RUSSIA      

P:  3SEP2021 136846    38.0N   44.0E 3.5-5.0 ACBAA  Turkey                     

 

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

 

SOUTHWEST PACIFIC

 

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

 

OCEAN RIDGES

 

O: 03SEP2021 05:40:10  24.5S  116.1W mb=4.8  EMSC   SOUTHERN EAST PACIFIC RISE

O:  3SEP2021 05:22:57  24.3S  116.0W Mw=5.4  EMSC   SOUTHERN EAST PACIFIC RISE   

P:  8SEP2021 136940    24.0S  115.0W 4.0-5.6 BAAAA  So. East Pacific Rise      

 

O:  2SEP2021 17:58:55  60.4S   48.8W mb=4.7  EMSC   SCOTIA SEA                   

 

O:  2SEP2021 14:17:56  42.0N   29.4W mb=4.6  EMSC   AZORES ISLANDS REGION        

P:  8SEP2021 136869    41.0N   30.0W 4.0-5.8 CAAAA  No. Mid-Atlantic Ridge     

 

O: 02SEP2021 08:47:25  58.9S   25.5W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 02SEP2021 12:01:52  59.2S   24.9W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 03SEP2021 00:56:41  59.4S   25.7W mb=4.7  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  3SEP2021 00:06:16  58.8S   25.8W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 BAAAA  So. Sandwich Islands       

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  2SEP2021 23:20:19  30.2S  177.0W mb=5.2  EMSC   KERMADEC ISLANDS, NEW ZEALAND

P:  9SEP2021 136955    31.0S  177.0W 4.0-5.4 CAAAA  So. Kermadec Islands       

 

O:  2SEP2021 22:18:35  31.4S  177.6E mb=4.4  EMSC   NORTH OF NEW ZEALAND         

P:  7SEP2021 136955    32.0S  179.0E 4.0-5.4 BAAAA  So. Kermadec Islands        

 

O:  2SEP2021 19:24:52  37.1S  178.3E ML=4.5  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  8SEP2021 136953    37.0S  178.0E 3.0-4.6 CAAAA  North Island, N.Z.         

 

JAPAN AND KURIL ISLANDS

 

O:  2SEP2021 13:51:30  33.9N  139.4E ML=4.1  EMSC   IZU ISLANDS, JAPAN REGION    

P:  3SEP2021 136820    35.0N  139.0E 3.5-5.0 ABAAA  No. Honshu, Japan          

 

O:  2SEP2021 19:03:48  39.5N  144.7E mb=4.5  EMSC   OFF EAST COAST OF HONSHU, JAPA

P:  2SEP2021 136841    38.0N  145.0E 4.0-5.4 ABAAA  So. of Honshu               

 

O:  2SEP2021 20:26:14  50.5N  150.5E Mw=5.2  EMSC   NORTHWEST OF KURIL ISLANDS   

P: 29AUG2021 136640    50.0N  148.0E 4.0-5.4 BABAA  Sakhalin                   

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 02SEP2021 09:06:41  33.2N  115.6W Ml=2.1  EMSC   SOUTHERN CALIFORNIA

O: 02SEP2021 09:08:55  33.2N  115.6W Ml=2.2  EMSC   SOUTHERN CALIFORNIA

O:  2SEP2021 09:05:37  33.2N  115.6W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P:  5SEP2021 136831    32.9N  115.6W 2.5-4.8 BAAAA  So. California             

 

O:  2SEP2021 17:30:19  34.0N  118.8W Ml=2.0  EMSC   CHANNEL ISLANDS REG., CALIFORN

P:  5SEP2021 136834    34.3N  118.5W 2.5-4.5 BAAAA  So. California             

 

O:  2SEP2021 16:20:46  38.7N  119.0W ml=2.1  EMSC   NEVADA                        

P:  4SEP2021 136801    38.3N  119.3W 2.5-4.5 AAAAA  California/Nevada area     

 

O:  3SEP2021 05:44:20  39.1N  123.2W Mw=3.8  EMSC   NORTHERN CALIFORNIA          

P:  7SEP2021 136807    39.0N  123.1W 2.5-4.4 BAAAA  Central California          

 

NEIC reported this earthquake of M 3.8 in Northern California was felt with intensity II-III in the area(s) of Northern California at Ukiah, Lakeport, Upper Lake, Hopland, Redwood Valley, Nice, Boonville, Potter Valley, Philo, and Gualala.

 

O:  2SEP2021 12:33:23  39.6N  119.5W ml=2.0  EMSC   NEVADA                       

P:  1SEP2021 136801    39.1N  119.6W 2.5-4.6 AAAAA  California/Nevada area     

 

O:  3SEP2021 04:54:20  40.0N  120.5W ML=2.5  EMSC   NORTHERN CALIFORNIA          

P:  5SEP2021 136808    39.8N  120.6W 2.5-4.6 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 Portola, Sierra City and Quincy.

 

O:  2SEP2021 23:59:48  40.3N  124.4W Md=2.2  EMSC   NORTHERN CALIFORNIA          

P: 31AUG2021 136608    40.2N  124.2W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

 

ALASKA

 

O:  3SEP2021 03:55:44  53.5N  163.6W mb=4.7  EMSC   UNIMAK ISLAND REGION, ALASKA 

P:  2SEP2021 136908    54.6N  163.6W 3.5-5.0 ABAAA  Unimak Islands, Aleutians  

 

O:  2SEP2021 08:08:34  54.5N  159.7W mb=4.6  EMSC   SOUTH OF ALASKA              

P:  2SEP2021 136890    54.7N  156.9W 3.5-5.1 AABAA  Alaska Peninsula           

 

O:  2SEP2021 13:37:42  55.1N  157.7W ML=3.9  EMSC   ALASKA PENINSULA             

P:  2SEP2021 136890    54.7N  156.9W 3.5-5.1 AAAAA  Alaska Peninsula           

 

O:  3SEP2021 04:15:56  63.9N  150.4W ML=3.1  EMSC   CENTRAL ALASKA               

P:  5SEP2021 136914    63.0N  151.5W 3.2-5.3 AAAAA  Central Alaska             

 

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  3SEP2021 04:20:10  43.4N  126.6W ML=3.0  EMSC   OFF COAST OF OREGON          

P:  2SEP2021 136875    44.3N  127.4W 3.0-4.8 AAAAA  Off Coast of Oregon        

 

O:  2SEP2021 07:49:15  49.3N  124.0W Ml=2.0  EMSC   VANCOUVER ISLAND, CANADA REGIO

P:  7SEP2021 136888    49.0N  123.0W 2.0-4.4 BAAAA  Washington state, U.S.     

 

ROCKY MOUNTAINS REGION

 

O: 02SEP2021 07:23:05  31.7N  104.4W ML=2.0  EMSC   WESTERN TEXAS

O: 02SEP2021 09:37:00  31.7N  104.0W ML=2.4  EMSC   WESTERN TEXAS

O: 02SEP2021 12:20:45  31.7N  104.4W ML=2.1  EMSC   WESTERN TEXAS

O: 03SEP2021 00:42:59  31.7N  104.4W ML=3.4  EMSC   WESTERN TEXAS

O: 03SEP2021 01:31:49  31.7N  104.4W ML=3.0  EMSC   WESTERN TEXAS

O: 03SEP2021 05:41:14  31.7N  104.4W ML=4.2  EMSC   WESTERN TEXAS

O: 03SEP2021 05:45:49  31.7N  104.4W ML=2.8  EMSC   WESTERN TEXAS

O:  3SEP2021 06:29:06  31.7N  104.4W ML=2.6  EMSC   WESTERN TEXAS                

P:  3SEP2021 136827    32.5N  104.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

O:  3SEP2021 06:22:38  32.1N  102.1W mb=2.4  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 BABAA  SW U.S.A                   

 

EASTERN U.S./CANADA

 

O: 01SEP2021 19:08:11  72.0N   75.0W MB=2.3  ECAN Pond Inlet, NU   

O: 01SEP2021 14:14:24  72.0N   75.1W MB=2.3  ECAN Pond Inlet, NU   

O: 01SEP2021 10:18:13  72.0N   75.2W MB=1.9  ECAN Pond Inlet, NU   

O: 01SEP2021 09:49:07  72.0N   75.2W MB=3.3  ECAN Pond Inlet, NU   

O:  1SEP2021 09:03:01  70.0N   71.7W MB=2.4  ECAN Clyde River, NU                

 

O:  1SEP2021 13:39:02  47.5N   70.2W MB=1.1  ECAN  Charlevoix Seismic Zone       

P:  3SEP2021 136866    47.3N   70.5W 2.0-4.1 AAAAA  New England                

 

O:  1SEP2021 11:21:37  73.6N   93.7W MB=1.5  ECAN Resolute, NU                   

 

O:  1SEP2021 09:29:17  51.1N   64.4W MB=1.8  ECAN Mingan, QC                     

P: 29AUG2021 136591    49.0N   66.0W 2.0-3.9 ACAAA  E. of Maine                

 

O:  2SEP2021 19:24:18  36.4N   98.2W ML=2.1  EMSC   OKLAHOMA                     

P: 31AUG2021 136576    37.0N   98.0W 2.0-4.3 AAAAA  Southern Plains            

 

O:  2SEP2021 13:27:23  36.5N   99.0W ML=2.1  EMSC   OKLAHOMA                     

P:  9SEP2021 136843    36.0N   99.0W 2.0-4.4 CAAAA  Southern Plains            

 

HAWAII

 

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

 

MODERATE QUAKE SHAKES ROMANIA

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 1, 2021

 

An earthquake of M 4.4 in Romania today was widely felt.  NEIC reported this earthquake of M 4.4 in Romania  was felt with intensity II-III in the area(s) of Romania at Stantu (VI); Pocsani, Galati, Bucherest (V) and IV in Brasov, Ploesti, Iasi and in Chiainau, Moldavia. Similar earthquakes of M 4.4 have shook Romania in the past year on August 11, 2021; April 9, 2021 and October 29, 2020 but the last of larger magnitude in Romania was an M 4.9 on April 24, 2020. Forecast 136615 had expected today's event was likely at the end of August within about 50 km of this epicenter.

 

O:  1SEP2021 10:32:11  45.7N   26.5E mb=4.4  EMSC   ROMANIA                      

P: 29AUG2021 136615    46.0N   27.0E 3.0-4.9 AAAAA  Romania/NW Turkey          

 

A moderate M 5.6-5.8 was felt in the area of Atacama, Chile today. NEIC reported this earthquake of M 5.6 in Atacama, Chile was felt with intensity II-III in the area(s) of Atacama, Chile at Copiapo (VI), Diego de Almagro (IV); and Vina del Mar, Quilpue, Valparaiso and Santiago, Chile.  GUC reported this earthquake was felt with intensity  III in  Tarapaca at Alto Hospicio and Iquique and in Antofagasta with III in Quillagua, Chile. This is the strongest earthquake in the area of Atacama within about 200 km of this epicenter since an M 6.0 about 150 km southwest of this on July 4, 2021. The last such event closer to this epicenter was an M 6.8 and aftershocks on September 1, 2020 exactly one year ago. Today's event may be an aftershock of that earthquake. Aftershocks at one year after mainshocks are statistically more likely than at other times and may be related to local weather conditions or ocean or atmospheric loading.  Forecasts 136678, 136679 and 136936 had expected enhanced seismicity in this area of Chile was likely at the end of August or in early September. This epicenter is located near 103 degrees from the M 7.1 in Vanuatu of August 18 and was probably promoted by energy from that source. Other events at this distance from Vanuatu today occurred as an M 5.6 in the South Sandwich Islands, Oacaxa and Guerrero, Mexico, Texas, Afghanistan.

 

O:  1SEP2021 18:36     27.7S   71.1W mb=5.8  GUC    Tarapaca at Alto Hospicio and

O:  1SEP2021 18:35:44  27.7S   71.2W Mw=5.6  EMSC   OFFSHORE ATACAMA, CHILE      

P: 26AUG2021 136679    28.0S   71.0W 4.0-5.4 BAAAA  Coast Central Chile        

P: 30AUG2021 136678    28.0S   68.0W 4.0-5.5 AACAA  Argentina                  

P:  4SEP2021 136936    29.0S   72.0W 4.0-5.5 BBAAA  Coast Central Chile        

 

Moderately strong earthquakes occurred today in the Central Mid-Atlantic Ridge. These events were not reported felt in these remote areas. They occurred as Hurricane Larry was forming to the north and may have been promoted by energy from that storm as noted in this summary:

 

"Hurricane Larry formed today in the mid-Atlantic with winds up to 75 kts. It is expected to track to the west over the next week but not to make landfall. Some minor seismic enhancement in the Virgin Islands may occur around September 6-9." (September 1, 2021)

 

Both of these occurred near local solar noon or midnight and were probably promoted by strong tidal stresses at this hour. The largest was an M 5.7 within minutes of local solar noon in the central Mid-Atlantic. This is the largest quake in the world today. The last earthquake within about 250 km of this epicenter with M>=5.7 was an M 6.5 on November 30, 2017. Forecast 136448 had expected today's event was likely within about 25 km of this epicenter at the end of August or early September. This activity is at 142 - 144 degrees from strong shocks in the Kermadec Islands (M 8.1, March 4) and Mindanao, Philippines (M 7.1, August 11) and at the sixth and seventh nodes (60 and 52 degrees) and may have been promoted by strong seismic energy from those sources.

 

O:  1SEP2021 13:50:13   1.1S   24.3W Mw=5.7  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P: 28AUG2021 136448     1.0S   24.0W 4.0-5.6 BAAAA  Central Mid-Atlantic       

 

An M 5.3 also occurred to the east of the M 5.7 in the area of the Atlantic north of Ascension Island. A similar M 5.3 hit within about 250 km of this epicenter on June 6, 2021 but the last event of larger magnitude in this area was an M 6.3 about 200 km to the east on October 23, 2019. Forecast 136726 had expected this event within about 100 km was likely around September 3.

 

O:  1SEP2021 22:51:35   1.6S   15.5W Mw=5.3  EMSC   NORTH OF ASCENSION ISLAND    

P:  3SEP2021 136726     1.0S   16.0W 4.0-5.4 AAAAA  Central Mid-Atlantic       

 

An earthquake of M 5.0 in Afghanistan today continues a series of moderate quakes in the area over the past week. NEIC reported this earthquake of M 5.0 in Afghanistan was felt with intensity II-III in the area(s) of Tajikistan at Boshkengash. It is at 103 degrees from the M 7.1 in Vanuatu of August 18 and may have been promoted by energy from that source. Forecast 136812 had expected enhanced seismicity in this area of Hindu Kush was likely around September 2.

 

O:  2SEP2021 04:50:06  37.5N   70.3E mb=5.0  EMSC   HINDU KUSH REGION, AFGHANISTAN

P:  2SEP2021 136812    36.0N   71.0E 3.8-5.5 ABAAA  Hindu Kush/Pakistan        

 

The strongest earthquakes in the world today again occurred in the South Sandwich Islands with events of M 5.6, 5.1, 5.0 and 4.9 recorded. These events were not reported felt in this remote area. These continue almost daily aftershocks at this magnitude level since the mainshock of M 8.1 on August 12, 2021. Forecast 136964 had expected this activity in early September within about 25 km of today's activity.

 

O: 01SEP2021 10:02:18  59.0S   25.6W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 02SEP2021 06:05:17  59.0S   25.6W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 02SEP2021 06:17:16  59.0S   25.5W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  1SEP2021 09:01:14  59.1S   25.7W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 CAAAA  So. Sandwich 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:  2SEP2021 04:50:06  37.5N   70.3E mb=5.0  EMSC   HINDU KUSH REGION, AFGHANISTAN

P:  2SEP2021 136812    36.0N   71.0E 3.8-5.5 ABAAA  Hindu Kush/Pakistan        

 

INDONESIA AND PHILIPPINES

 

O:  1SEP2021 13:40:39   0.1S  123.9E ML=4.5  EMSC   SULAWESI, INDONESIA          

P:  3SEP2021 136713     0.0N  122.0E 4.0-5.6 AABAA  Celebes Sea                

P:  5SEP2021 136719     0.0N  123.0E 4.0-5.5 BAAAA  Mindanao, Philippines      

 

O:  1SEP2021 16:53:54   2.8S  138.7E ML=4.2  EMSC   PAPUA, INDONESIA             

P: 31AUG2021 136468     2.0S  139.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O:  1SEP2021 07:36:09   6.2S  130.6E mb=4.5  EMSC   BANDA SEA                    

P: 25AUG2021 136446     7.0S  130.0E 4.0-5.4 CAAAA  Banda Sea                  

 

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

 

CENTRAL AND SOUTH AMERICA

 

O:  1SEP2021 21:21:52   4.9S   80.8W ML=4.2  EMSC   PERU-ECUADOR BORDER REGION   

P: 31AUG2021 136450     4.0S   80.0W 4.0-5.5 AAAAA  Ecuador                    

 

O:  1SEP2021 16:50:30   9.1N   83.7W ML=4.1  EMSC   COSTA RICA                    

P:  2SEP2021 136745    10.0N   84.0W 3.5-5.1 AAAAA  Caribbean Sea              

 

O:  1SEP2021 08:57:40  15.4N   94.8W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P: 30AUG2021 136473    16.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 01SEP2021 09:33:55  18.4N   73.6W ML=3.4  EMSC   HAITI REGION

O: 01SEP2021 07:24:28  18.5N   73.8W ML=3.2  EMSC   HAITI REGION

O:  1SEP2021 09:19:57  18.4N   73.7W ML=3.3  EMSC   HAITI REGION                 

P:  7SEP2021 136771    19.0N   74.0W 3.4-5.3 CAAAA  Puerto Rico                

 

O:  2SEP2021 05:32:26  19.6N   67.5W Md=3.9  EMSC   PUERTO RICO REGION           

P:  4SEP2021 136770    19.0N   68.0W 3.4-5.2 AAAAA  Puerto Rico                

 

O:  2SEP2021 00:16:36  19.7N   71.5W ML=3.1  EMSC   DOMINICAN REPUBLIC           

P: 31AUG2021 136499    20.0N   71.0W 3.0-4.6 AAAAA  Bahamas/No. Caribbean      

 

O:  1SEP2021 12:52:52  24.3S   67.5W mb=4.2  EMSC   SALTA, ARGENTINA             

P: 28AUG2021 136677    23.0S   66.0W 4.0-5.6 BBBAA  Argentina                   

 

O:  1SEP2021 18:35:44  27.7S   71.2W Mw=5.6  EMSC   OFFSHORE ATACAMA, CHILE      

O:  1SEP2021 18:36     27.7S   71.1W mb=5.8  GUC    Tarapaca at Alto Hospicio and

P: 26AUG2021 136679    28.0S   71.0W 4.0-5.4 BAAAA  Coast Central Chile         

P: 30AUG2021 136678    28.0S   68.0W 4.0-5.5 AACAA  Argentina                  

P:  4SEP2021 136936    29.0S   72.0W 4.0-5.5 BBAAA  Coast Central Chile        

 

 

AFRICA AND EUROPE

 

O:  2SEP2021 05:48:37  38.3N   23.3E ML=4.1  EMSC   GREECE                        

P: 26AUG2021 136614    40.0N   21.0E 3.0-5.1 CBBAA  Romania/NW Turkey          

 

O:  1SEP2021 10:32:11  45.7N   26.5E mb=4.4  EMSC   ROMANIA                      

P: 29AUG2021 136615    46.0N   27.0E 3.0-4.9 AAAAA  Romania/NW Turkey           

 

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

 

SOUTHWEST PACIFIC

 

O:  1SEP2021 08:21:05  18.7S  174.1W Mw=5.2  EMSC   TONGA                        

P: 26AUG2021 136674    19.0S  176.0W 4.0-5.7 CABAA  Tonga Islands               

 

NEIC reported this earthquake of M 5.2 in Tonga was felt with intensity II-III in the area(s) of Tonga at Neiafu.

 

O:  1SEP2021 17:13:20  24.3S  179.9W mb=4.6  EMSC   SOUTH OF FIJI ISLANDS        

P:  2SEP2021 136945    24.0S  177.0W 4.0-5.8 AABAA  Tonga Islands              

P:  9SEP2021 136945    25.0S  180.0W 4.0-5.4 CAAAA  Tonga Islands              

 

OCEAN RIDGES

 

O:  1SEP2021 13:50:13   1.1S   24.3W Mw=5.7  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P: 28AUG2021 136448     1.0S   24.0W 4.0-5.6 BAAAA  Central Mid-Atlantic       

 

O:  1SEP2021 22:51:35   1.6S   15.5W Mw=5.3  EMSC   NORTH OF ASCENSION ISLAND    

P:  3SEP2021 136726     1.0S   16.0W 4.0-5.4 AAAAA  Central Mid-Atlantic       

 

O:  1SEP2021 07:11:31  42.7S   82.4W mb=4.9  EMSC   WEST CHILE RISE              

P: 24AUG2021 136701    43.0S   83.0W 4.0-5.6 CAAAA  Chile Rise                 

 

O: 01SEP2021 10:02:18  59.0S   25.6W mb=5.1  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 02SEP2021 06:05:17  59.0S   25.6W mb=5.0  EMSC   SOUTH SANDWICH ISLANDS REGION

O: 02SEP2021 06:17:16  59.0S   25.5W mb=4.9  EMSC   SOUTH SANDWICH ISLANDS REGION

O:  1SEP2021 09:01:14  59.1S   25.7W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  7SEP2021 136964    59.0S   26.0W 4.0-5.6 CAAAA  So. Sandwich Islands       

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  1SEP2021 21:09:22  31.9S  179.7E ML=4.1  EMSC   KERMADEC ISLANDS REGION      

P:  7SEP2021 136955    32.0S  179.0E 4.0-5.4 CAAAA  So. Kermadec Islands       

 

O:  1SEP2021 12:23:14  33.2S  180.0E ML=4.3  EMSC   SOUTH OF KERMADEC ISLANDS    

O:  1SEP2021 08:10:21  33.4S  179.0E ML=4.2  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 29AUG2021 136700    34.0S  179.0E 4.0-5.5 AAAAA  So. Kermadec Islands       

 

O:  1SEP2021 22:49:54  37.7S  179.7E ML=4.0  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  8SEP2021 136953    37.0S  178.0E 3.0-4.6 CABAA  North Island, N.Z.         

 

JAPAN AND KURIL ISLANDS

 

O: 01SEP2021 19:17:07  37.7N  141.6E mb=4.6  EMSC   NEAR EAST COAST OF HONSHU, JAPAN

O:  1SEP2021 08:16:41  37.7N  141.8E mb=4.3  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  2SEP2021 136825    38.0N  142.0E 4.0-5.5 AAAAA  Off East Coast Honshu      

 

O:  1SEP2021 23:46:06  41.5N  142.1E mb=4.2  EMSC   HOKKAIDO, JAPAN REGION       

P:  8SEP2021 136856    42.0N  143.0E 3.5-5.5 CAAAA  Hokkaido, Japan            

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  1SEP2021 20:55:21  31.2N  115.6W ML=3.0  EMSC   BAJA CALIFORNIA, MEXICO      

O:  1SEP2021 08:43:08  31.8N  115.9W ML=3.3  EMSC   BAJA CALIFORNIA, MEXICO       

P: 29AUG2021 136560    32.1N  116.4W 2.5-4.9 AAAAA  So. California             

 

O:  1SEP2021 13:00:43  33.8N  116.1W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P: 27AUG2021 136566    33.9N  116.9W 2.5-4.8 BAAAA  So. California             

 

O:  1SEP2021 09:21:13  35.1N  119.1W Ml=2.4  EMSC   CENTRAL CALIFORNIA           

P: 29AUG2021 136567    34.9N  119.0W 2.5-4.4 AAAAA  So. California             

 

O:  1SEP2021 22:58:33  36.5N  118.0W Ml=2.1  EMSC   CENTRAL CALIFORNIA           

P:  2SEP2021 136797    37.1N  117.8W 2.5-4.8 AAAAA  California/Nevada area     

 

O:  1SEP2021 13:14:28  36.5N  121.1W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P:  3SEP2021 136803    36.4N  121.0W 2.5-4.6 AAAAA  Central California         

 

O:  1SEP2021 23:13:35  37.6N  121.8W Md=2.6  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P:  5SEP2021 136805    37.4N  121.8W 2.5-4.4 BAAAA  Central California         

 

NEIC reported this earthquake of M 2.6 in Central California was felt with intensity II-III in the area(s) of Central California at Pleasantn, Livermore, Dublin, San Ramon, Danville, Antioch, Oakland and Berkeley.

 

O:  1SEP2021 17:51:54  38.1N  118.8W ml=2.2  EMSC   CENTRAL CALIFORNIA           

P: 28AUG2021 136522    38.4N  118.7W 2.5-4.7 BAAAA  California/Nevada area     

 

O:  1SEP2021 18:54:28  38.5N  119.5W ml=2.3  EMSC   CENTRAL CALIFORNIA           

P:  2SEP2021 136801    38.8N  119.6W 2.5-4.5 AAAAA  California/Nevada area     

 

O:  1SEP2021 20:35:04  40.6N  115.2W ml=3.0  EMSC   NEVADA                        

O: 01SEP2021 16:23:31  40.9N  115.1W ml=2.3  EMSC   NEVADA

P:  2SEP2021 136854    40.2N  114.6W 2.5-4.7 AAAAA  California/Nevada area     

 

 

ALASKA

 

O:  2SEP2021 03:40:47  57.9N  155.3W ML=3.6  EMSC   ALASKA PENINSULA             

P:  2SEP2021 136890    54.7N  156.9W 3.5-5.1 ACAAA  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:  1SEP2021 11:10:33  31.6N  104.0W ML=2.1  EMSC   WESTERN TEXAS                

O: 01SEP2021 07:19:23  32.2N  103.1W ML=2.5  EMSC   NEW MEXICO

O: 01SEP2021 08:54:10  32.2N  103.1W ML=2.0  EMSC   NEW MEXICO

P:  3SEP2021 136827    32.5N  104.6W 2.0-3.9 AAAAA  SW U.S.A                   

 

O:  1SEP2021 08:03:03  31.9N  101.8W ML=2.1  EMSC   WESTERN TEXAS                

P:  6SEP2021 136827    31.6N  103.6W 2.0-3.9 BABAA  SW U.S.A                   

 

O:  1SEP2021 20:23:38  39.4N  110.3W ML=2.3  EMSC   UTAH                         

P: 30AUG2021 136582    39.7N  110.8W 2.0-4.4 AAAAA  Utah area                  

 

O: 01SEP2021 16:30:37  44.4N  115.2W Ml=2.3  EMSC   SOUTHERN IDAHO

O:  1SEP2021 22:07:40  44.3N  115.2W ML=2.5  EMSC   SOUTHERN IDAHO               

P:  2SEP2021 136862    44.4N  115.1W 2.0-4.0 AAAAA  Montana/Idaho              

 

EASTERN U.S., CANADA

 

O:  1SEP2021 11:09:59  28.9N   98.4W ML=2.0  EMSC   SOUTHERN TEXAS               

P:  1SEP2021 136785    29.0N   99.0W 3.0-4.9 AAAAA  Northern Mexico            

 

O:  1SEP2021 07:13:59  33.9N   96.8W ML=2.1  EMSC   OKLAHOMA                     

P:  2SEP2021 136843    35.0N   97.0W 2.0-4.3 ABAAA  Southern Plains            

 

O:  1SEP2021 15:26:02  35.1N   95.3W mb=2.7  EMSC   OKLAHOMA                     

P:  2SEP2021 136843    35.0N   97.0W 2.0-4.3 AABAA  Southern Plains            

 

O: 01SEP2021 18:02:01  36.5N   99.0W ML=2.0  EMSC   OKLAHOMA

O:  1SEP2021 18:52:36  36.5N   99.0W mb=2.7  EMSC   OKLAHOMA                     

P: 31AUG2021 136576    37.0N   98.0W 2.0-4.3 AAAAA  Southern Plains            

 

O:  1SEP2021 09:49:07  72.0N   75.2W ML=3.3  EMSC   BAFFIN ISLAND REGION, CANADA 

 

HAWAII

 

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

 

 

 

 

 

SEISMICITY IN WESTERN U.S. UP FOLLOWING HURRICANE IDA LANDFALL

 

EARTHQUAKE SUMMARY FOR AUGUST 31, 2021

 

A series of unusual, moderate earthquakes were felt in California and Nevada today following an M 4.4 off the coast of Oregon yesterday. These were concentrated in northern and central California and Nevada with the largest an M 4.7 in northern Nevada. Other moderate regional events occurred in the area south of San Francisco in the Paicines area and off the coast of Northern California with M 4.0 and 4.2. This may be related to landfall of Hurricane Ida on the coast of Louisiana over the past two days - one of the strongest hurricanes to make landfall in the U.S. in several hundred years. This summary noted this hurricane in previous issues as:

 

"Hurricane Ida continued over Kentucky today with winds up to 30 kts. It made landfall today with winds up to 160 kts, a category 4 hurricane, one of the strongest ever to make landfall in the U.S. Much damage occurred in southern Louisiana but only one death was initially reported. It is expected to track to the north into Tennessee August 30-31 as a category 2 hurricane. Seismicity in Guatemala and Honduras is likely to remain high due to atmospheric downloading with the low pressures in Ida. A further moderate quake in this region is possible in the next several days. Regional seismicity in the southeastern U.S. may be enhanced with landfall in the next two days. A light M 2.7 in Tennessee near the eye of Ida today may have been promoted by loading effects with this storm. Damage is currently estimated at $200 billion." (August 29-31, 2021)

 

A moderate earthquake of M 4.7 was felt in northeastern Nevada today. This was the strongest event in the U.S. or Canada today. NEIC reported maximum intensity V in Jackpot, Nevada and IV in Deeth and Well with II-III in Spring Creek, Elko, Carlin, Crescent Valley, Ely, Battle Mountain and Eureka, Nevada. The only earthquakes of equal or greater magnitude within about 100 km of this epicenter

during the past 30 years was an M 6.0 on February 21, 2008 and prior to that an M 4.7 on November 23, 2003. At the time of the event on February 21, 2008 - of which this is the strongest aftershock to date - this summary noted:

 

 

"NEIC reported that the earthquake in Nevada near Wells was felt with maximum intensity VI and caused damage in the area. It was felt throughout the Great Basin and Rocky Mountains area of the Unites States within about 1000 km of the epicenter.

 

... This is the strongest earthquake ever recorded by NEIC in this region of Nevada (39-42N 113-116W). UUSN scientists stated that no earthquake of this size had hit the region in the past 150 years. The historic district, largely unoccupied now, in Wells was heavily damaged. At least 20-25 buildings were heavily damaged according to reports from the area. Brick facades fell from several buildings and windows broke. Some vehicles were damaged by falling debris. The town's 140 years old brothel was badly damaged. Wells formed in the late 19th century as deep clear springs attracted travelers going west to California and has often been used in western and road movies. The historic district may need to be demolished after the quake according to local officials. All commercial establishments were closed. The town of Wells was closed to all but residents numbering more than 1000. At least three injures were reported. a broken arm, head lacerations and breathing difficulties. Two buildings partially collapsed and two water mains ruptured. Train traffic was temporarily suspended but schools continued.  There were no problems found in underground gold mines in the region although 40 miners were underground at the time of the quake.  More than two feet of snow in the area will hinder geological investigation until spring. While Nevada is the third most seismic state in the U.S. after Alaska and California, the University of Nevada reported just two days ago that the state had seen the third lowest seismic in recent history in the year 2007." (February 22, 2008)

 

This epicenter is at 106 degrees from the M 7.1 in Mindanao, Philippines of August 11, 2021 and was probably promoted by concentrated energy from that source. Forecasts 136854 and 136582 had expected seismic enhancement in this area at the end of August or early September within about 100 km of this epicenter.

 

O: 31AUG2021 17:21:10  41.0N  114.9W Mw=4.7  EMSC   NEVADA                       

P:  2SEP2021 136854    40.2N  114.6W 2.5-4.7 AAAAA  California/Nevada area     

P: 30AUG2021 136582    39.6N  111.9W 2.0-4.4 ABBAA  Utah area                  

 

The M 4.7 in Nevada followed an M 4.1 in  the Pinnacles area of Central California. NEIC reported this event was felt with intensity IV in Paicines, Soledad, Greenfield and II-III in Gonzales, Hollister, Salnas, King City and San Juan Bautista, Central California. This is the strongest earthquake within about 50 km of this epicenter since an M 4.3 on January 2, 2021 and an M 4.7 on October 15, 2019. Forecasts 136526 and 136803 had expected today's event within about 25 km was likely between August 31 and September 3. This event is at 103 degrees from the M 7.1 in Mindanao of August 11, 2021 and was probably promoted by energy from that source.

 

O: 31AUG2021 16:09:55  36.6N  121.1W Mw=4.1  EMSC   CENTRAL CALIFORNIA           

P:  3SEP2021 136803    36.4N  121.0W 2.5-4.6 BAAAA  Central California         

P: 26AUG2021 136526    36.7N  121.4W 2.5-4.6 BAAAA  Central California         

 

An M 4.0 also occurred off the coast of Northern California earlier in the day. NEIC reported it was felt with intensity II-III in Whitethorn, Carberville, Leggett and Willits, California. Larger earthquakes in this area occurred on July 18 and July 21, 2021 with M 4.4 and M 5.1 and this may be an aftershock of those events. Forecast 136608 had expected today's activity within about 25 km was likely around August 31.

 

O: 31AUG2021 08:01:11  40.3N  124.4W ML=3.4  EMSC   OFFSHORE NORTHERN CALIFORNIA 

O: 31AUG2021 08:01:11  40.3N  124.4W ML=4.0  ANSS   OFFSHORE NORTHERN CALIFORNIA 

P: 31AUG2021 136608    40.2N  124.2W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

A moderate earthquake of M 5.4 was felt strongly in northern Vanuatu today. NEIC reported intensity VIII in Sola Torba, Vanuatu for this event. This may be a regional aftershock of an M 6.9-7.1 which occurred about 150 km to the south of this on August 18. Forecasts 136933 and 136676 had expected today's activity within about 50 km at the end of August.

 

O: 31AUG2021 13:26:58  13.7S  167.5E Mw=5.4  EMSC   VANUATU                      

P:  2SEP2021 136933    13.0S  167.0E 4.0-5.4 AAAAA  Vanuatu Islands            

P: 28AUG2021 136676    14.0S  168.0E 4.0-5.4 BAAAA  Vanuatu Islands            

 

The strongest earthquakes in the world today occurred beneath the world's oceans. These included the strongest - an M 5.6 in the South Sandwich Islands; a series of events of M 4.7, 4.8 and 5.0 in the Northern Mid-Atlantic Ridge and an M 5.2 in the Scotia Sea west of the South Sandwich Islands. The activity in the northern mid-Atlantic Ridge is the strongest within about 150 km of that  epicenter since an M 5.2 on October 29, 2016. It was possibly promoted by stresses associated with Tropical Storm Kate which is currently located to the southwest of this epicenter as noted in previous summaries:

 

"TS Kate continued today in the North Atlantic east of Florida with winds up to 35 kts." (August 31, 2021)

 

Forecasts 135783 and 136506 had expected this activity was likely at the end of August or in early September within about 100 km of these epicenters. This activity is at 142-144 degrees from the M 8.1 in the Kermadec Islands of March 4, 2021  and the M 7.1 in Mindanao, Philippines of August 11, 2021.

 

O: 31AUG2021 22:54:49  29.8N   42.7W mb=4.8  EMSC   NORTHERN MID-ATLANTIC RIDGE

O: 31AUG2021 22:02:47  29.9N   42.8W mb=4.7  EMSC   NORTHERN MID-ATLANTIC RIDGE

O: 31AUG2021 22:24:23  29.8N   42.7W mb=5.0  EMSC   NORTHERN MID-ATLANTIC RIDGE  

P:  4SEP2021 136783    29.0N   43.0W 4.0-5.5 BAAAA  Mid-Atlantic Ridge         

P: 26AUG2021 136506    29.0N   44.0W 4.0-5.5 BAAAA  Mid-Atlantic Ridge         

 

The M 5.6 in the South Sandwich Islands today continued similar activity on a nearly daily basis which has followed the M 8.1 of August 12. Forecast 136710 had expected today's event at the end of August.

 

O: 31AUG2021 14:24:27  57.0S   25.2W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 25AUG2021 136710    59.0S   26.0W 4.0-5.7 CBAAA  So. Sandwich Islands       

 

The earthquake of M 5.2 in the Scotia is the strongest in that region since an M 5.5 on April 14, 2018. An event of M 5.9 hit about 100 km to the northeast on May 6, 2017. Forecast 136712 had expected today's event within about 20 km east of today's epicenter around August 28.  This event is at 102 degrees from the M 7.1 in Vanuatu August 18, 2021 and was probably promoted by energy from that source. Other activity in the world today near 103 degrees from the Vanuatu event was located southern Texas, Oaxaca, Mexico, the South Sandwich Islands.

 

 

O: 31AUG2021 22:40:28  61.2S   39.0W mb=5.2  EMSC   SCOTIA SEA                    

P: 28AUG2021 136712    61.0S   34.0W 4.0-5.5 BABAA  Southern  Ocean            

 

An unusual earthquake of M 5.1 was also felt in central Turkey today. NEIC reported maximum intensity V in Turkey at Insanye, Afyon and IV in Afyonkarahisar. This is the strongest earthquake within about 200 km of this epicenter since an 5.8 about 150 km to the southwest of this on August 8, 2019. Forecasts 136580 and 136606 had expected enhanced seismicity in this area was likely at the end of August.

 

O: 31AUG2021 11:04:26  39.0N   30.2E Mw=5.1  EMSC   WESTERN TURKEY               

P: 26AUG2021 136580    39.0N   28.0E 3.5-5.1 BABAA  Turkey                     

P: 31AUG2021 136606    41.0N   31.0E 3.5-5.2 ABAAA  No. Turkey/Black Sea       

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: 31AUG2021 22:27:56  23.3N  120.7E ML=4.9  EMSC   TAIWAN                        

O: 31AUG2021 22:27:56  23.3N  120.7E ML=4.9  TAI    Hualien, Taiwan              

P: 29AUG2021 136512    23.0N  123.0E 4.0-5.4 AABAA  Taiwan                     

 

CWB reported this earthquake was felt with intensity IV in Chiayi, Kaohsiung, Tainan; II in Nantou, Taitung, Yunlin, Hualien, Changhua and I in Pingtung, Taichung, Miaoli and Penghu Counties, Taiwan.

 

O: 31AUG2021 07:09:05  54.7N   83.6E mb=4.3  EMSC   SOUTHWESTERN SIBERIA, RUSSIA 

 

O: 31AUG2021 22:36:17  55.9N  113.4E mb=4.3  EMSC   BURYATIYA, RUSSIA            

P:  2SEP2021 136906    50.0N  113.0E 3.0-4.5 ACAAA  So. Siberia                

 

O:  1SEP2021 04:14:19  56.3N  117.8E mb=4.0  EMSC   CHITINSKAYA OBLAST', RUSSIA  

P:  1SEP2021 136906    57.0N  121.0E 3.0-4.8 AABAA  So. Siberia                

 

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

 

INDONESIA AND PHILIPPINES

 

O: 31AUG2021 09:22:29   3.3S  134.0E ML=4.0  EMSC   PAPUA, INDONESIA             

P: 31AUG2021 136467     4.0S  135.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O: 31AUG2021 10:34:07   5.7S  128.6E mb=4.2  EMSC   BANDA SEA                    

P: 28AUG2021 136445     6.0S  128.0E 4.0-5.5 BAAAA  Banda Sea                  

 

O: 31AUG2021 22:26:06   7.1N  125.6E mb=4.5  EMSC   MINDANAO, PHILIPPINES        

P: 29AUG2021 136437     7.0N  124.0E 4.0-5.6 AABAA  Central Philippines        

 

NEIC reported this earthquake of M 4.5 in Mindanao, Philippines was felt with intensity II-III in the area(s) of Mindanao, Philippines at Davao, Bato, Canocotan and Balutakay.

 

O: 31AUG2021 20:13:02  10.0S  112.6E ML=4.0  EMSC   SOUTH OF JAVA, INDONESIA     

P: 29AUG2021 136460     9.0S  113.0E 4.0-5.8 AAAAA  So. of Bali                

 

O: 31AUG2021 15:26:58  11.5N  125.4E ML=4.6  EMSC   SAMAR, PHILIPPINES           

P:  2SEP2021 136754    10.0N  126.0E 3.5-5.1 ABAAA  Luzon, Philippines         

 

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

 

CENTRAL AND SOUTH AMERICA

 

O: 31AUG2021 11:36:33   3.4S   78.3W ML=4.4  EMSC   PERU-ECUADOR BORDER REGION

O: 31AUG2021 09:11:07   3.3S   78.1W mb=4.7  EMSC   PERU-ECUADOR BORDER REGION   

P: 31AUG2021 136450     4.0S   80.0W 4.0-5.5 AABAA  Ecuador                    

 

NEIC reported this earthquake of M 4.7 on the Peru-Ecuador border  was felt with intensity II-III in the area(s) of the Peru-Ecuador border at Cuenca, Macas, Gualaquiza, Morona Santiago, Ecuador.

 

O: 31AUG2021 07:53:52  12.5N   87.8W ML=4.0  EMSC   NEAR COAST OF NICARAGUA      

P: 28AUG2021 136487    13.0N   87.0W 3.5-5.2 BAAAA  Nicaragua                  

 

O: 31AUG2021 11:44:28  13.6S   75.9W mb=4.5  EMSC   CENTRAL PERU                 

P: 29AUG2021 136663    13.0S   77.0W 4.0-5.6 AAAAA  Central Peru               

 

O: 01SEP2021 01:58:59  15.7N   95.0W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO

O: 01SEP2021 06:27:46  16.1N   94.8W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO

O: 31AUG2021 09:08:36  15.5N   94.1W ML=4.4  EMSC   OFFSHORE CHIAPAS, MEXICO     

P: 30AUG2021 136473    16.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 31AUG2021 19:09:08  17.6S   69.7W mb=4.3  EMSC   TARAPACA, CHILE              

P: 31AUG2021 136670    17.0S   69.0W 4.0-5.5 AAAAA  So. Peru/Bolivia           

 

O: 31AUG2021 09:29:32  17.0N  100.5W ML=4.0  EMSC   OFFSHORE GUERRERO, MEXICO

O: 31AUG2021 12:37:57  17.0N  100.5W ML=4.2  EMSC   OFFSHORE GUERRERO, MEXICO

O: 31AUG2021 21:46:38  17.9N  101.0W ML=4.0  EMSC   GUERRERO, MEXICO             

P:  2SEP2021 136759    18.0N  101.0W 3.5-5.1 AAAAA  Michoacan, Mexico          

P: 28AUG2021 136484    18.0N  102.0W 3.5-5.4 BAAAA  Michoacan, Mexico          

 

O: 31AUG2021 10:28:19  18.0N   66.8W ML=3.4  EMSC   PUERTO RICO

O: 31AUG2021 08:27:45  18.0N   66.8W ML=3.3  EMSC   PUERTO RICO                  

P: 26AUG2021 136492    18.0N   67.0W 3.4-5.5 BAAAA  Puerto Rico                

 

NEIC reported this earthquake of M 3.5 in Southwestern Puerto Rico was felt with intensity II-III in the area(s) of Southwestern Puerto Rico with V at Ensenada anv IV in Guayanilla and II-III in Penuelas, Ponce, Puerto Rico.

 

O:  1SEP2021 00:54:54  18.4N   73.7W ML=3.5  EMSC   HAITI REGION                 

P: 26AUG2021 136494    18.0N   74.0W 3.4-5.4 BAAAA  Haiti                      

 

O: 31AUG2021 07:52:42  28.1S   70.8W mb=4.4  EMSC   ATACAMA, CHILE               

P: 26AUG2021 136679    28.0S   71.0W 4.0-5.4 BAAAA  Coast Central Chile        

 

O: 31AUG2021 13:11:28  29.7S   71.6W mb=4.3  EMSC   OFFSHORE COQUIMBO, CHILE     

P: 26AUG2021 136695    30.0S   71.0W 4.0-5.6 BAAAA  Coast Central Chile        

 

 

AFRICA AND EUROPE

 

O: 31AUG2021 11:04:26  39.0N   30.2E Mw=5.1  EMSC   WESTERN TURKEY               

P: 26AUG2021 136580    39.0N   28.0E 3.5-5.1 BABAA  Turkey                     

P: 31AUG2021 136606    41.0N   31.0E 3.5-5.2 ABAAA  No. Turkey/Black Sea       

 

SOUTHWEST PACIFIC

 

O: 31AUG2021 13:26:58  13.7S  167.5E Mw=5.4  EMSC   VANUATU                      

P:  2SEP2021 136933    13.0S  167.0E 4.0-5.4 AAAAA  Vanuatu Islands            

P: 28AUG2021 136676    14.0S  168.0E 4.0-5.4 BAAAA  Vanuatu Islands            

 

O: 31AUG2021 10:04:53  18.2S  178.2W Mw=5.2  EMSC   FIJI REGION                  

P: 26AUG2021 136674    19.0S  176.0W 4.0-5.7 BABAA  Tonga Islands              

 

O: 31AUG2021 21:22:19  23.8S  179.2W mb=4.2  EMSC   SOUTH OF FIJI ISLANDS        

P: 30AUG2021 136690    22.0S  180.0W 4.0-5.6 ABAAA  Tonga Islands              

 

O: 31AUG2021 22:59:16  19.5S  169.7E mb=4.4  EMSC   VANUATU                      

P:  4SEP2021 136934    19.0S  168.0E 4.0-5.7 BABAA  Vanuatu Islands            

P: 29AUG2021 136676    18.0S  168.0E 4.0-5.6 ABBAA  Vanuatu Islands            

 

O:  1SEP2021 06:33:45  22.3S  171.7E Mw=5.1  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

P:  2SEP2021 136937    22.0S  169.0E 4.0-5.5 AABAA  Loyalty Islands            

P: 28AUG2021 136681    23.0S  171.0E 4.0-5.7 BAAAA  Loyalty Islands            

 

OCEAN RIDGES

 

O: 31AUG2021 22:54:49  29.8N   42.7W mb=4.8  EMSC   NORTHERN MID-ATLANTIC RIDGE

O: 31AUG2021 22:02:47  29.9N   42.8W mb=4.7  EMSC   NORTHERN MID-ATLANTIC RIDGE

O: 31AUG2021 22:24:23  29.8N   42.7W mb=5.0  EMSC   NORTHERN MID-ATLANTIC RIDGE  

P:  4SEP2021 136783    29.0N   43.0W 4.0-5.5 BAAAA  Mid-Atlantic Ridge         

P: 26AUG2021 136506    29.0N   44.0W 4.0-5.5 BAAAA  Mid-Atlantic Ridge          

 

O: 31AUG2021 14:24:27  57.0S   25.2W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 25AUG2021 136710    59.0S   26.0W 4.0-5.7 CBAAA  So. Sandwich Islands       

 

O: 31AUG2021 18:27:01  60.2S   24.1W mb=4.8  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  3SEP2021 136965    61.0S   22.0W 4.0-5.6 BABAA  Southern  Ocean            

 

O: 31AUG2021 22:40:28  61.2S   39.0W mb=5.2  EMSC   SCOTIA SEA                   

P: 28AUG2021 136712    61.0S   34.0W 4.0-5.5 BABAA  Southern  Ocean            

 

 

ZEALANDIA AND AUSTRALIA REGION

 

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

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

 

JAPAN AND KURIL ISLANDS

 

O: 31AUG2021 17:55:12  33.9N  135.3E mb=4.0  EMSC   NEAR S. COAST OF WESTERN HONSH

P: 29AUG2021 136532    33.0N  137.0E 3.5-5.0 AABAA  Central/So. Honshu Japan   

 

NEIC reported this earthquake of M 4.0 in Southwestern Honshu, Japan was felt with intensity II-III in the area(s) of Southwestern Honshu, Japan at Kobe.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  1SEP2021 02:15:09  32.1N  117.1W Ml=2.3  EMSC   OFFSHORE BAJA CALIFORNIA, MEXI

P: 29AUG2021 136560    32.1N  116.4W 2.5-4.9 AAAAA  So. California             

 

O: 31AUG2021 15:20:55  32.4N  115.2W Ml=2.3  EMSC   BAJA CALIFORNIA, MEXICO      

P: 29AUG2021 136560    32.1N  116.4W 2.5-4.9 AAAAA  So. California             

 

O: 31AUG2021 09:50:07  35.5N  118.4W Ml=3.1  EMSC   CENTRAL CALIFORNIA           

P: 30AUG2021 136568    35.3N  118.6W 2.5-4.5 AAAAA  So. California             

 

NEIC reported this earthquake of M 3.1 in Central California was felt with intensity II-III in the area(s) of Central California at Bodfish, Lake Isabella, Weldon, Wofford Heights, Tehachapi, Inyokern, California.

 

O: 31AUG2021 22:26:40  35.9N  117.7W Ml=2.4  EMSC   CENTRAL CALIFORNIA

O:  1SEP2021 00:00:40  35.9N  117.7W Ml=2.2  EMSC   CENTRAL CALIFORNIA           

P: 28AUG2021 136570    35.9N  117.7W 2.5-4.6 BAAAA  So. California             

 

O: 31AUG2021 15:04:51  36.0N  116.2W ml=2.0  EMSC   CENTRAL CALIFORNIA           

P: 28AUG2021 136569    35.5N  116.4W 2.5-4.7 BAAAA  So. California             

 

O: 31AUG2021 16:09:55  36.6N  121.1W Mw=4.1  EMSC   CENTRAL CALIFORNIA           

P:  3SEP2021 136803    36.4N  121.0W 2.5-4.6 BAAAA  Central California         

P: 26AUG2021 136526    36.7N  121.4W 2.5-4.6 BAAAA  Central California         

 

O: 31AUG2021 18:27:32  37.5N  121.8W Md=2.3  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P:  5SEP2021 136805    37.4N  121.8W 2.5-4.4 BAAAA  Central California         

P: 30AUG2021 136527    36.9N  121.7W 2.5-4.7 AAAAA  Central California         

 

O: 31AUG2021 19:55:31  38.2N  117.9W ml=2.0  EMSC   NEVADA                       

P: 28AUG2021 136522    38.4N  118.7W 2.5-4.7 BAAAA  California/Nevada area     

P: 29AUG2021 136520    37.4N  118.6W 2.5-4.7 AAAAA  California/Nevada area     

 

O: 31AUG2021 22:08:35  38.3N  122.7W Md=2.2  EMSC   NORTHERN CALIFORNIA          

P:  2SEP2021 136806    38.7N  122.7W 2.5-4.5 AAAAA  Central California          

P: 28AUG2021 136529    38.9N  122.8W 2.5-4.6 BAAAA  Central California         

 

NEIC reported this earthquake of M 3.4 north of San Francisco, California  was felt with intensity II-III in the area(s)  north of San Francisco, California at Ukiah, Lakeport, Upper Lake, Redwood Valley, Hoopland, Nice, Willits.

 

O: 31AUG2021 08:17:59  38.6N  119.4W ml=2.5  EMSC   CENTRAL CALIFORNIA

O: 31AUG2021 19:07:43  38.6N  119.4W ml=2.7  EMSC   CENTRAL CALIFORNIA

O:  1SEP2021 05:10:59  38.5N  119.4W Md=2.0  EMSC   CENTRAL CALIFORNIA           

P: 30AUG2021 136523    38.5N  119.6W 2.5-4.6 AAAAA  California/Nevada area     

 

NEIC reported this earthquake of M 2.8 in Western Nevada was felt with intensity II-III in the area(s) of Western Nevada at Coleville.

 

O: 31AUG2021 08:01:11  40.3N  124.4W ML=3.4  EMSC   OFFSHORE NORTHERN CALIFORNIA 

O: 31AUG2021 08:01:11  40.3N  124.4W ML=4.0  ANSS   OFFSHORE NORTHERN CALIFORNIA 

P: 31AUG2021 136608    40.2N  124.2W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

O: 31AUG2021 17:21:10  41.0N  114.9W Mw=4.7  EMSC   NEVADA                       

P:  2SEP2021 136854    40.2N  114.6W 2.5-4.7 AAAAA  California/Nevada area     

P: 30AUG2021 136582    39.6N  111.9W 2.0-4.4 ABBAA  Utah area                  

 

ALASKA

 

O: 31AUG2021 22:15:47  54.6N  156.8W mb=3.8  EMSC   SOUTH OF ALASKA              

O: 31AUG2021 10:05:15  55.6N  156.1W ml=3.1  EMSC   SOUTH OF ALASKA              

P: 29AUG2021 136625    54.7N  156.9W 3.5-5.3 AAAAA  Alaska Peninsula           

 

O: 31AUG2021 07:03:48  63.6N  149.8W ML=3.4  EMSC   CENTRAL ALASKA               

P: 30AUG2021 136651    63.0N  148.6W 3.2-5.3 AAAAA  Central Alaska             

 

O: 31AUG2021 16:42:51  69.2N  144.5W ML=3.3  EMSC   NORTHERN ALASKA              

P: 28AUG2021 136655    69.0N  144.0W 3.0-4.8 BAAAA  Northern Alaska            

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

 

O: 31AUG2021 19:06:54  46.0N  122.9W Md=2.0  EMSC   OREGON                       

P:  5SEP2021 136886    46.9N  122.0W 2.0-4.2 BAAAA  Washington state, U.S.      

 

ROCKY MOUNTAINS REGION

 

O: 31AUG2021 07:50:11  31.6N  104.1W ML=2.5  EMSC   WESTERN TEXAS

O: 31AUG2021 13:33:23  31.7N  104.4W ML=3.6  EMSC   WESTERN TEXAS

O: 01SEP2021 02:38:24  31.8N  103.8W ML=2.7  EMSC   WESTERN TEXAS

O: 31AUG2021 11:57:14  31.5N  103.4W ML=2.4  EMSC   WESTERN TEXAS                

O: 31AUG2021 10:17:19  32.2N  103.1W ML=2.1  EMSC   NEW MEXICO                   

P: 25AUG2021 136557    31.6N  103.6W 2.0-4.0 CAAAA  SW U.S.A                   

 

NEIC reported this earthquake of M 3.6 in Western Texas was felt with intensity II-III in the area(s) of Western Texas in Salt Flat.

 

O: 31AUG2021 19:57:31  39.4N  110.3W ML=2.1  EMSC   UTAH                         

P: 30AUG2021 136582    39.7N  110.8W 2.0-4.4 AAAAA  Utah area                   

 

O: 31AUG2021 11:39:46  42.4N  110.2W Ml=2.3  EMSC   WYOMING                      

P: 29AUG2021 136590    41.8N  108.7W 2.0-4.3 AABAA  Colorado area              

 

O: 31AUG2021 14:15:13  44.5N  115.2W ML=2.4  EMSC   SOUTHERN IDAHO

O: 31AUG2021 14:17:00  44.5N  115.3W ML=2.7  EMSC   SOUTHERN IDAHO

O: 31AUG2021 14:28:31  44.5N  115.2W ML=2.5  EMSC   SOUTHERN IDAHO

O: 31AUG2021 18:33:13  44.4N  115.2W Ml=2.4  EMSC   SOUTHERN IDAHO               

P:  2SEP2021 136862    44.4N  115.1W 2.0-4.0 AAAAA  Montana/Idaho              

P: 26AUG2021 136599    44.4N  115.1W 2.0-4.1 BAAAA  Montana/Idaho              

 

O:  1SEP2021 00:06:03  45.1N  111.9W Ml=2.1  EMSC   WESTERN MONTANA              

P: 29AUG2021 136624    45.6N  111.9W 2.0-3.9 AAAAA  Yellowstone/Wyoming        

 

EASTERN U.S./CANADA

 

O: 31AUG2021 12:28:40  28.9N   98.3W ML=2.0  EMSC   SOUTHERN TEXAS

O: 31AUG2021 10:57:44  28.9N   98.3W ML=2.5  EMSC   SOUTHERN TEXAS               

P:  1SEP2021 136785    29.0N   99.0W 3.0-4.9 AAAAA  Northern Mexico            

P: 24AUG2021 136509    28.0N   98.0W 3.0-4.6 CAAAA  Northern Mexico            

 

O: 31AUG2021 10:36:28  47.4N   77.6W MB=2.1  ECAN Val-d'Or, QC                   

P:  5SEP2021 136868    47.0N   76.0W 2.0-4.3 BAAAA  New York State              

 

O: 29AUG2021 08:24:23  47.5N   61.9W MB=2.1  ECAN Cap-aux-Meules, QC             

P: 29AUG2021 136591    49.0N   66.0W 2.0-3.9 ABCAA  E. of Maine                

 

HAWAII

 

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