MODERATE SWARM ON CALIFORNIA-MEXICO BORDER

 

EARTHQUAKE SUMMARY FOR AUGUST 9, 2020

 

A swarm of light earthquakes has been occurring in southeastern California near the Mexican border. This swarm began shortly after a C-class solar flare the strongest in more than two months. Swarms in this area of high heat flow are often associated with unusual flares or solar activity. Such swarms occasionally grow over several days and include a moderate sized event. But it also occurs that they grow without a recognizable mainshock and gradually dissipate. The C-Class solar flare was noted in the previous issues of this report as:

 

"The first solar flare of C-class or higher since May 29, 2020 (C9.3, M1.0) occurred near local solar midnight in North Carolina on August 8. This is the second largest solar flare in the past year following the May 29 event. Solar flares, especially rare ones such as this, can also help trigger seismicity in earthquake-prone areas.

 

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

 

6190       0342   0349      0355   C1.5      (August 8, 2020)   5.5E-04  

" (August 9, 2020)

 

The last series in this region which included an M 4.0 or greater event occurred on January 12, 2020; November 12, 2019 and November 19, 2018. Forecast 126102 had expected today's activity was likely around August 6-11. This activity is located at the 10th node (36 degrees) from the Alaska Peninsula and was probably promoted by energy from that source.

 

O: 08AUG2020 12:49:50  32.9N  115.5W Ml=2.0  EMSC   SOUTHERN CALIFORNIA

O: 08AUG2020 12:42:19  32.9N  115.5W Ml=2.4  EMSC   SOUTHERN CALIFORNIA

O: 09AUG2020 02:45:11  33.0N  115.9W ML=2.8  EMSC   SOUTHERN CALIFORNIA

O: 09AUG2020 01:14:48  33.0N  115.9W Ml=2.2  EMSC   SOUTHERN CALIFORNIA

O: 09AUG2020 01:11:06  33.0N  115.9W Ml=2.0  EMSC   SOUTHERN CALIFORNIA

O:  8AUG2020 23:40:31  33.2N  115.6W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

O: 09AUG2020 21:03:23  33.3N  115.7W Ml=2.1  EMSC   SOUTHERN CALIFORNIA

P:  6AUG2020 126102    32.4N  115.8W 2.5-4.4 AAAAA  So. California             

P: 11AUG2020 126102    32.8N  116.0W 2.5-4.5 BAAAA  So. California             

 

The strongest earthquake in the world today was an M 5.9 in the area south of

Africa. It was accompanied by an M 5.4 aftershock of the M 6.3 in the Prince

Edward Islands in the same general region of the South Indian Ocean. This epicenter is near the antipode of the M 7.8 quake of July 22 in the Alaska Peninsula and had been expected to see antipodal triggering at this times in this summary as:

 

 

"Far field triggering is likely with the earthquake in Alaska. The antipode is located south of South Africa in the Indian Ocean east of Bouvet Island and is a possible site for triggered activity." (July 22, 2020)

 

The last earthquake within about 400 km of this epicenter with M>=5.9 was an M 6.6 on January 28, 2019 and prior to that an M 6.7 on October 10, 2017. Forecast 126237 had expected today's event to the east around August 11.

 

O:  9AUG2020 23:42:36  53.0S   11.7E Mw=5.9  EMSC   SOUTHWEST OF AFRICA           

P: 11AUG2020 126237    53.0S   19.0E 4.0-5.4 AACAA  Atlantic-Indian Ridge      

 

Other areas of the mid-ocean ridges were also active today. These included  an M 5.2 in the Central Mid-Atlantic Ridge and an M 4.7 in the Southern East Pacific Rise. These had been anticipated in early August in forecasts 125971 and 125982 within about 50 km of these epicenters.

 

O:  9AUG2020 16:30:30  41.7S   42.6E Mw=5.4  EMSC   PRINCE EDWARD ISLANDS REGION 

P: 30JUL2020 125971    41.0S   43.0E 4.0-5.4 CAAAA  So. Indian Ocean           

 

O:  9AUG2020 12:42:12   0.9N   27.7W Mw=5.2  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P:  8AUG2020 125982     1.0N   28.0W 4.0-5.9 AAAAA  Central Mid-Atlantic Ridg  

 

O: 10AUG2020 01:39:13  23.5S  115.2W mb=4.7  EMSC   SOUTHERN EAST PACIFIC RISE   

P: 11AUG2020 126214    24.0S  115.0W 4.0-5.7 AAAAA  So. East Pacific Rise      

 

The strongest seismicity in the U.S. or Canada once again occurred in the Alaska Peninsula aftershock zone with M 5.2. It was not reported felt in this remote area. Forecasts 126166 and 126177 had expected this aftershock activity around August 8-9.

 

O: 09AUG2020 20:48:14  54.7N  161.2W ml=3.7  EMSC   ALASKA PENINSULA

O: 09AUG2020 12:39:46  54.9N  158.6W ml=3.4  EMSC   SOUTH OF ALASKA

O: 10AUG2020 06:49:42  54.9N  160.3W ML=4.1  EMSC   ALASKA PENINSULA

O:  9AUG2020 14:57:53  55.2N  158.1W Mw=5.2  EMSC   ALASKA PENINSULA             

P:  5AUG2020 126166    55.1N  159.3W 3.5-4.9 BAAAA  Alaska Peninsula           

P:  8AUG2020 126166    55.0N  161.3W 3.5-4.9 AAAAA  Alaska Peninsula           

P:  9AUG2020 126177    54.1N  162.8W 3.5-5.0 AAAAA  Unimak Islands, Aleutians  

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

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

 

ASIA

 

O:  9AUG2020 08:50:12  30.3N   94.8E mb=4.8  EMSC   EASTERN XIZANG               

O:  9AUG2020 17:13:33  30.4N   94.9E mb=4.9  EMSC   EASTERN XIZANG               

P: 11AUG2020 126108    32.0N   95.0E 3.5-5.0 ABAAA  So. China                  

 

O:  9AUG2020 09:16:19  34.1N   45.6E Mw=4.9  EMSC   IRAN-IRAQ BORDER REGION      

P:  9AUG2020 126110    33.0N   48.0E 3.8-5.4 ABBAA  So. Iran                   

 

NEIC reported this earthquake of M 4.9 in the Iran-Iraq border  was felt with intensity II-III in the area(s) of the Iran-Iraq border at Baghdad.

 

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

 

INDONESIA AND PHILIPPINES

 

O: 10AUG2020 03:09:45   2.6N  127.4E ML=4.0  EMSC   MOLUCCA SEA                  

P:  7AUG2020 125988     2.0N  128.0E 4.0-5.6 BAAAA  Halmahera                  

 

O:  9AUG2020 22:36:44   3.3S  143.8E mb=4.7  EMSC   NEAR N COAST OF NEW GUINEA, PN

P:  7AUG2020 126011     3.0S  142.0E 4.0-5.4 AABAA  Papua New Guinea           

 

O:  9AUG2020 07:17:58   5.2S  103.0E ML=4.3  EMSC   SOUTHERN SUMATRA, INDONESIA  

P: 10AUG2020 126013     6.0S  105.0E 4.0-5.5 AABAA  So. of Java                

 

O:  9AUG2020 12:15:32   5.4N  126.0E ML=4.3  EMSC   MINDANAO, PHILIPPINES        

P: 11AUG2020 125984     7.0N  126.0E 4.0-5.6 ABAAA  Central Philippines        

 

O:  9AUG2020 14:54:42   5.7S  128.8E ML=4.2  EMSC   BANDA SEA                    

P:  9AUG2020 125996     7.0S  129.0E 4.0-5.6 ABAAA  Banda Sea                  

 

O:  9AUG2020 22:12:25   9.3S  110.3E mb=4.7  EMSC   SOUTH OF JAVA, INDONESIA     

P:  6AUG2020 126013     9.0S  106.0E 4.0-5.4 BACAA  So. of Java                

 

O:  9AUG2020 23:43:01   9.7S  119.0E ML=4.1  EMSC   SUMBA REGION, INDONESIA      

O:  9AUG2020 21:31:13   9.8S  118.9E mb=4.6  EMSC   SUMBAWA REGION, INDONESIA    

P: 11AUG2020 126001     7.0S  120.0E 4.0-5.6 ACAAA  Flores Island area         

 

O:  9AUG2020 17:52:27  17.9N  123.3E ML=4.0  EMSC   PHILIPPINE ISLANDS REGION    

P: 11AUG2020 126065    20.0N  123.0E 4.0-5.4 ACAAA  Taiwan                     

 

O:  9AUG2020 08:52:52  18.3N  145.5E mb=4.4  EMSC   PAGAN REG., N. MARIANA ISLANDS

P:  5AUG2020 126040    19.0N  146.0E 4.0-5.4 BAAAA  No. Marianas               

 

 

CENTRAL AND SOUTH AMERICA

 

O:  9AUG2020 15:13:05  15.5N   94.6W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P: 11AUG2020 126026    16.0N   95.0W 3.5-5.3 AAAAA  Chiapas, Mexico            

 

O:  9AUG2020 19:01:37  16.0N   95.8W ML=4.0  EMSC   OAXACA, MEXICO               

P:  8AUG2020 126044    17.0N   96.0W 3.5-5.3 AAAAA  Oaxaca, Mexico             

 

O: 09AUG2020 19:52:01  17.9N   66.8W Md=3.4  EMSC   PUERTO RICO REGION

O: 09AUG2020 22:31:07  17.9N   67.0W ML=3.3  EMSC   PUERTO RICO REGION

O: 09AUG2020 22:31:07  17.9N   67.0W ML=3.3  EMSC   PUERTO RICO REGION

O: 09AUG2020 23:18:03  17.9N   66.9W ML=3.3  EMSC   PUERTO RICO REGION

O:  9AUG2020 09:09:16  17.9N   66.9W ML=3.6  EMSC   PUERTO RICO REGION           

P: 11AUG2020 126046    18.0N   68.0W 3.4-5.1 AAAAA  Puerto Rico                

 

O:  9AUG2020 20:41:30   8.1N   84.3W ML=4.0  EMSC   OFF COAST OF COSTA RICA      

O:  9AUG2020 14:52:30   9.0N   83.7W ML=4.3  EMSC   COSTA RICA                   

P:  8AUG2020 126023    10.0N   84.0W 3.5-5.2 AAAAA  Caribbean Sea              

 

O:  9AUG2020 20:40:32   2.8N   84.4W mb=4.6  EMSC   OFF COAST OF CENTRAL AMERICA 

P:  4AUG2020 125994     2.0N   85.0W 4.0-5.8 BAAAA  So. of Panama              

 

O:  9AUG2020 18:08:42  33.0S   71.8W Mw=4.2  EMSC   OFFSHORE VALPARAISO, CHILE   

P:  6AUG2020 126221    33.0S   70.0W 4.0-5.7 BABAA  Central Chile              

 

AFRICA AND EUROPE

 

O: 10AUG2020 04:33:05  12.9S   45.5E ML=3.0  EMSC   MAYOTTE REGION               

P: 31JUL2020 125931    18.0S   42.0E 3.0-4.8 CCCAA  Madagascar area            

 

O: 10AUG2020 02:07:54  40.6N   22.7E ML=4.1  EMSC   GREECE                       

P: 11AUG2020 126091    39.0N   21.0E 3.0-4.5 ABBAA  No. Greece                 

 

NEIC reported this earthquake of M 4.4 in Thessaloniki, Greece  was felt with intensity II-III in the area(s) of Thessaloniki, Greece at Kalamaria and Trindria.

 

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:  9AUG2020 12:42:12   0.9N   27.7W Mw=5.2  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P:  8AUG2020 125982     1.0N   28.0W 4.0-5.9 AAAAA  Central Mid-Atlantic Ridg  

 

O: 10AUG2020 01:39:13  23.5S  115.2W mb=4.7  EMSC   SOUTHERN EAST PACIFIC RISE   

P: 11AUG2020 126214    24.0S  115.0W 4.0-5.7 AAAAA  So. East Pacific Rise      

 

O:  9AUG2020 23:42:36  53.0S   11.7E Mw=5.9  EMSC   SOUTHWEST OF AFRICA          

P: 11AUG2020 126237    53.0S   19.0E 4.0-5.4 AACAA  Atlantic-Indian Ridge      

 

O:  9AUG2020 16:30:30  41.7S   42.6E Mw=5.4  EMSC   PRINCE EDWARD ISLANDS REGION 

P: 30JUL2020 125971    41.0S   43.0E 4.0-5.4 CAAAA  So. Indian Ocean           

 

O: 10AUG2020 04:47:42  28.2N   15.0W ML=2.2  EMSC   CANARY ISLANDS, SPAIN REGION

O: 09AUG2020 17:02:41  28.6N   18.1W ML=2.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 10AUG2020 06:16:59  27.6N   18.0W ML=2.8  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 11AUG2020 126054    28.0N   16.0W 3.0-4.6 AAAAA  Canary Islands             

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  9AUG2020 22:26:40  31.7S  178.9E ML=4.4  EMSC   KERMADEC ISLANDS REGION      

O:  9AUG2020 17:19:33  32.6S  179.7E ML=4.2  EMSC   SOUTH OF KERMADEC ISLANDS    

P:  8AUG2020 126229    31.0S  180.0E 4.0-5.5 AAAAA  So. Kermadec Islands       

 

O:  9AUG2020 09:24:47  33.4S  179.6W ML=3.9  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 11AUG2020 126229    33.0S  178.0W 4.0-5.7 AAAAA  So. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O:  9AUG2020 07:04:30  26.2N  127.0E ML=3.8  EMSC   RYUKYU ISLANDS, JAPAN        

P:  4AUG2020 126063    26.0N  128.0E 4.0-5.5 BAAAA  Ryukyu Islands             

 

O: 10AUG2020 00:24:40  35.4N  140.5E mb=4.8  EMSC   NEAR EAST COAST OF HONSHU, JAP

O:  9AUG2020 12:54:30  35.6N  140.2E ML=4.0  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  8AUG2020 126097    35.0N  140.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

NEIC reported this earthquake of M 4.8 in Tokyo, Japan  was felt with intensity II-III in the area(s) of Tokyo, Japan in Kanagawa.

 

O: 10AUG2020 05:32:08  45.0N  146.2E mb=4.2  EMSC   KURIL ISLANDS                

P:  9AUG2020 126127    43.0N  146.0E 3.5-5.7 ABAAA  Hokkaido, Japan            

 

O:  9AUG2020 22:40:04  50.8N  156.8E mb=4.5  EMSC   KURIL ISLANDS                 

P:  6AUG2020 126137    49.0N  156.0E 3.5-5.4 BBAAA  NE Pacific                 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  9AUG2020 22:28:27  37.9N  122.0W Md=2.0  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 11AUG2020 126078    37.9N  122.0W 2.5-4.5 AAAAA  Central California         

 

O: 10AUG2020 03:30:24  34.9N  121.0W Md=2.6  EMSC   OFFSHORE CENTRAL CALIFORNIA  

P:  8AUG2020 126099    35.7N  121.2W 2.5-4.7 AAAAA  Off So. California         

 

 

O: 10AUG2020 02:21:07  38.2N  117.8W ml=2.4  EMSC   NEVADA

O: 09AUG2020 16:53:09  38.2N  117.9W ml=2.1  EMSC   NEVADA

O: 10AUG2020 02:21:07  38.2N  117.8W ml=2.4  EMSC   NEVADA

O: 09AUG2020 13:34:13  38.1N  118.1W ml=2.1  EMSC   NEVADA

O:  9AUG2020 11:48:40  38.2N  118.0W ml=2.5  EMSC   NEVADA                        

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 BAAAA  California/Nevada area     

 

O: 09AUG2020 13:20:31  38.8N  122.7W Md=2.3  EMSC   NORTHERN CALIFORNIA

O: 10AUG2020 02:27:15  38.8N  122.8W Md=2.1  EMSC   NORTHERN CALIFORNIA

O: 09AUG2020 22:08:53  38.8N  122.8W Md=2.4  EMSC   NORTHERN CALIFORNIA

O: 10AUG2020 06:42:28  38.8N  122.8W Md=2.5  EMSC   NORTHERN CALIFORNIA          

P: 11AUG2020 126079    39.0N  122.8W 2.5-4.4 AAAAA  Central California         

 

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

 

ALASKA

 

O: 09AUG2020 20:48:14  54.7N  161.2W ml=3.7  EMSC   ALASKA PENINSULA

O: 09AUG2020 12:39:46  54.9N  158.6W ml=3.4  EMSC   SOUTH OF ALASKA

O: 10AUG2020 06:49:42  54.9N  160.3W ML=4.1  EMSC   ALASKA PENINSULA

O:  9AUG2020 14:57:53  55.2N  158.1W Mw=5.2  EMSC   ALASKA PENINSULA             

P:  5AUG2020 126166    55.1N  159.3W 3.5-4.9 BAAAA  Alaska Peninsula            

P:  8AUG2020 126166    55.0N  161.3W 3.5-4.9 AAAAA  Alaska Peninsula           

P:  9AUG2020 126177    54.1N  162.8W 3.5-5.0 AAAAA  Unimak Islands, Aleutians  

 

O:  9AUG2020 07:59:40  58.3N  133.5W ML=3.1  EMSC   SOUTHEASTERN ALASKA          

O:  9AUG2020 23:59:57  58.4N  133.4W ML=3.2  EMSC   SOUTHEASTERN ALASKA          

P:  6AUG2020 126163    58.0N  133.0W 4.0-5.5 BAAAA  Southeast Alaska           

 

O: 10AUG2020 06:28:27  60.0N  146.4W ML=3.8  EMSC   GULF OF ALASKA               

P: 29JUL2020 125909    60.6N  147.6W 3.2-5.1 DAAAA  Central Alaska             

 

O:  9AUG2020 23:10:49  60.6N  143.0W Mw=4.6  EMSC   SOUTHERN ALASKA              

O:  9AUG2020 23:13:35  60.7N  143.0W ML=3.6  EMSC   SOUTHERN ALASKA              

P:  6AUG2020 126180    60.0N  138.0W 3.2-5.1 BABAA  Central Alaska             

 

NEIC reported this earthquake of M 4.5 in Southern Alaska  was felt with intensity II-III in the area(s) of Southern Alaska at Copper Center.

 

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:  9AUG2020 15:47:17  44.4N  115.2W ML=3.0  EMSC   SOUTHERN IDAHO               

P:  6AUG2020 126133    44.5N  115.1W 2.0-4.2 BAAAA  Montana/Idaho               

 

EASTERN U.S./CANADA

 

O:  9AUG2020 12:07:37  36.5N   81.1W Mw=5.1  EMSC   VIRGINIA-N CAROLINA BORDER REG

P:  9AUG2020 126086    37.2N   81.9W 2.0-4.2 AAAAA  Kentucky/Tennessee/NC      

 

O: 10AUG2020 01:41:35  45.9N   77.1W mb=2.4  EMSC   SOUTHERN ONTARIO, CANADA     

P: 11AUG2020 126139    47.0N   76.0W 2.0-4.0 ABAAA  New York State             

 

HAWAII

 

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

 

MODERATE QUAKE IN VIRGINIA-NORTH CAROLINA WIDELY FELT

 

EARTHQUAKE SUMMARY FOR AUGUST 8, 2020

 

An earthquake of M 5.1 shook large areas of eastern U.S. today. This event was centered on the North Carolina-Virginia border. It was reported by nearly 100,000 persons to NEIC. Maximum intensity V was felt in North Carolina at Sarta, Glade Valle, Ennice, Roaring Gap, Traphill and Hays with IV in Laurel Springs, Thurmond, North Carolina and Independence, Virginia. Light to moderate shaking was reported throughout most of the eastern U.S. including in Tennessee, Virginia, Kentucky, North and South Carolina. It was also reported up to 1500 km from the epicenter in South Dakota, Kansas, Ontario, Nova Scotia, and Arizona among most other states in between.  While lighter foreshocks of M 2.2 and 2.1 occurred about a day earlier, an M 2.6 foreshock near local solar midnight may have been tidally enhanced. It was reported felt with maximum intensity V in North Wilkesboro, North Carolina; IV in North Carolina at Sparta, Hiddenite, Lenoir and Statesville among other localities. Damage was minimal but internet pictures showed store items thrown to the floor in many areas and cleanup will be extensive. Some structural damage was reported including the collapse of a chimney in Sparta, North Carolina. The last earthquake of similar or larger magnitude in the area was an M 5.2 on 1916 in the Great Smoky Mountains.

The earthquake of August, 2011 near Mineral, Virginia of M 5.8 was one of the largest in east coast history and did extensive damage as far as Washington, D.C. A series of foreshocks hit the region in the day prior to the mainshock with M 2.1-2.6.

 

Hurricane Isaias passed near this epicenter 5-6 days ago and stresses associated with that storm, the second in the region this year (following TS Arthur on May 17-18, 2020), probably enhanced the likelihood of today's seismicity. This was reported in this summary as possibly affecting regional seismicity at the time as:

 

TROPICAL STORM ISAIAS  

 

----  -------  ----------  --------  -----  ------  -------  ---------------

TS    ISAIAS   2020-08-03  00:00 UT  35.0N   74.9W   45 kts  U.S. east coast

 

TS Isaias continued today in the area along the U.S. east coast with winds up to 45 kts. It is expected to track to the north and west over the next several days. Enhanced seismicity in Puerto Rico and the Dominican Republic is expected with this storm while it is in the area. It is then expected track along the eastern seaboard of the U.S. at category 1 hurricane levels. Some minor seismicity in the region is possible with this weak storm, but no major earthquakes on the east or west coasts of the U.S. are thought likely with the track of this storm." (August 4-5, 2020)

 

 

Some of this activity may have also been promoted by tidal stresses. The main foreshocks of M 2.6 occurred within minutes of local solar midnight, a prime time for tidal stresses to trigger seismicity. The longitude is also near the longitude of maximum tidal stress with the previous full moon of August 3 as noted in previous issues of this summary:

 

"The full moon  arrived at 15:59 UT on August 3, 2020. Longitudes which were sub-solar (local solar noon) at this time are 60 West and 120 East and include in the west the Caribbean and Puerto Rico and portions of northern and western South America. Those in the east include the Philippines and central Indonesia near Sulawesi. These areas may see moderate seismic enhancement at this time. Many areas can see tidal enhancement with lunar-solar alignments so the seismicity of the earth is expected to be at active conditions through August 7." (August 2-5, 2020)

 

The first solar flare of C-class or higher since May 29, 2020 (C9.3, M1.0) occurred near local solar midnight in North Carolina on August 8. This is the second largest solar flare in the past year following the May 29 event. Solar flares, especially rare ones such as this, can also help trigger seismicity in earthquake-prone areas.

 

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

 

6190       0342   0349      0355   C1.5      (August 8, 2020)   5.5E-04  

 

Today's epicenter in North Carolina is near the seventh node (52 degrees) from the M 7.8 of July 22 in the Alaska Peninsula and was probably enhanced by energy from that source.

 

This is the strongest earthquake within about 250 km of this epicenter in the North Carolina-Virginia border region since an M 5.2 on July 8, 1926 and prior to that an M 5.5 on February 21, 1916 and 5.2 on January 1, and March 28, 1913. The largest quake in the area in recorded history was an M 5.8 on May 31, 1897.

The only event of M>=5.2 in this region  in the past 75 years was an M 5.6 west of this on November 30, 1973. This summary had noted this event in the history section of this report as:

 

 

"Felt over an area of about 150,000 sq. km. in Georgia, Kentucky, South Carolina, Tennessee, North Carolina, Tennessee, Virginia and West Virginia.  Cracks in walls were observed at the University of Tennessee Hospital in Knoxville.  Minor damage to walls and chimneys and cracked windows reported in Alcoa and Maryville, Tennessee. Electrical power was cut. This was the largest shock in eastern Tennessee in more than 60 years - since March 28, 1913." (November 30, 1919)

 

The M 5.2  on July 8, 1926 had been noted:

 

"Houses rattled, chimneys cracked, building foundations cracked, water pipelines broke and small objects moved within 6 miles of the epicenter." (July 8, 2020)

 

and that of M 5.3 on March 28, 2013 as:

 

"Near Knoxville, Tenn. Two shocks were felt over an area 70 by 40 miles, with noticeable rise and fall of ground in some places.  Fire alarms were set off. Knox County Courthouse, a massive structure trembled for two minutes. Movable objects were overthrown and bricks fell from chimneys. Nausea was reported by some." (March 28, 2020)

 

Forecast 126086 had expected enhanced seismicity within about 100 km of this epicenter was likely around August 9.

 

O: 08AUG2020 11:05:39  36.5N   81.1W ML=2.0  EMSC   VIRGINIA-N CAROLINA BORDER REG

O: 08AUG2020 11:12:32  36.5N   81.1W Md=2.3  EMSC   VIRGINIA-N CAROLINA BORDER REG

O: 09AUG2020 05:57:16  36.5N   81.1W mb=2.7  EMSC   VIRGINIA-N CAROLINA BORDER REG

O:  9AUG2020 12:07:37  36.5N   81.1W Mw=5.1  EMSC   VIRGINIA-N CAROLINA BORDER REG

O:  9AUG2020 12:07:37  36.5N   81.1W Mw=5.2  ANSS   VIRGINIA-N CAROLINA BORDER REG

P:  9AUG2020 126086    37.2N   81.9W 2.0-4.2 AAAAA  Kentucky/Tennessee/NC      

 

Earthquakes of M 3.7-3.8 off the coast of Northern California were also felt along the coastline. NEIC reported it was felt with intensity II-III in California at Ferndale, Whitethorn, Eureka, Arcata and Fort Bragg. Forecast 126143 had expected this activity was likely around August 6.

 

O: 09AUG2020 00:00:34  40.3N  124.7W Mw=3.7  EMSC   OFFSHORE NORTHERN CALIFORNIA

O:  9AUG2020 03:23:49  40.3N  124.9W ML=3.1  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  6AUG2020 126143    40.2N  124.2W 2.5-4.6 BAAAA  Off Coast of No. Calif     

 

 

An earthquake of M 3.6 also occurred today off the coast of Oregon. NEIC reported it was felt lightly in Florence and Eugene, Oregon. When an M 6.3 earthquake occurred in the Prince Edward Island region yesterday, this summary noted the antipodal relation to areas off western Oregon and northwestern California as:

 

"This epicenter (in Prince Edward Islands) is near the antipode off the coast of Northern California and Oregon and could help enhance seismicity in that area in the next several days." (August 7, 2020)

 

Forecast 126145 had expected the event off Oregon was likely within about 50 km around August 5. The last event in this region of equal or larger magnitude was an M 3.9 on July 6, 2020.

 

O:  8AUG2020 08:51:25  43.9N  129.0W mb=3.6  EMSC   OFF COAST OF OREGON          

P:  5AUG2020 126145    44.4N  129.3W 3.0-4.5 BAAAA  Off Coast of Oregon        

 

The largest earthquake in the U.S. or Canada today was an M 5.5 aftershock in the Alaska Peninsula. NEIC reported it was felt with intensity IV in King Cove ad III in Chignik, Alaska. After an initial lull in aftershocks following the M 7.8 of July 22, 2020, earthquakes of M>=5 have been nearly a daily occurrence in the aftershock zone. Forecasts 126177 and 126166 had expected today's activity was likely around August 5-7.

 

O: 08AUG2020 16:12:02  54.7N  161.1W ML=3.4  EMSC   ALASKA PENINSULA

O: 09AUG2020 01:51:41  54.7N  161.2W mb=4.5  EMSC   ALASKA PENINSULA

O: 09AUG2020 03:30:21  54.7N  161.0W mb=3.9  EMSC   ALASKA PENINSULA

O: 08AUG2020 14:42:54  54.8N  161.2W Mw=5.5  EMSC   ALASKA PENINSULA

O: 08AUG2020 18:13:19  54.8N  161.2W ml=3.5  EMSC   ALASKA PENINSULA

O:  9AUG2020 06:39:49  54.6N  161.1W ML=3.3  EMSC   ALASKA PENINSULA             

P:  7AUG2020 126177    54.7N  161.2W 3.5-5.1 AAAAA  Unimak Islands, Aleutians  

 

O:  8AUG2020 12:53:00  55.0N  158.5W Mw=5.4  EMSC   SOUTH OF ALASKA              

P:  5AUG2020 126166    55.1N  159.3W 3.5-4.9 BAAAA  Alaska Peninsula           

 

An M 4.3 shook areas of South Island, New Zealand today. NEIC reported intensity II-III in Richmond, Nelson, Blenheim, Wellington and Christchurch. GEONET reported it was felt with moderate intensity in northern South Island. 2726 people reported feeling this event; 1765 with weak intensity; 883 with light shaking; 70 moderate; 5 strong; 2 with severe and 1 with extreme shaking. The last event listed by NEIC with M>=4.7 within about 150 km of this epicenter occurred October 22, 2017 with M 4.9. Forecast 126233 had expected today's event within about 10 km of the epicenter was  likely around August 7. This epicenter is at 100 degrees from the  Alaska Peninsula M 7.8 of July 22 and was probably promoted by energy from that event concentrated at the surface at this distance.

 

O: 08AUG2020 07:51:34  41.9S  173.0E ML=4.7  GEONET Felt with moderate intensity

O:  8AUG2020 07:51:32  41.9S  173.0E Mw=4.3  EMSC   SOUTH ISLAND OF NEW ZEALAND  

P:  7AUG2020 126233    42.0S  173.0E 3.0-5.1 AAAAA  So. Island, N.Z.           

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:  8AUG2020 08:44:00  30.4N   94.9E mb=4.9  EMSC   EASTERN XIZANG               

P: 11AUG2020 126108    32.0N   95.0E 3.5-5.0 BBAAA  So. China                  

 

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

 

INDONESIA AND PHILIPPINES

 

O:  8AUG2020 08:34:06   1.0N   97.2E mb=4.5  EMSC   NIAS REGION, INDONESIA       

P:  8AUG2020 125993     0.0N   98.0E 4.0-5.4 AAAAA  So. Sumatera               

 

O:  8AUG2020 16:57:04   1.0N  124.7E Mw=4.9  EMSC   MINAHASA, SULAWESI, INDONESIA

P:  6AUG2020 125990     0.0N  123.0E 4.0-5.6 AABAA  Mindanao, Philippines      

 

O:  8AUG2020 09:59:23   1.3N  128.1E mb=4.6  EMSC   HALMAHERA, INDONESIA         

O:  8AUG2020 21:54:30   1.4N  126.4E mb=4.6  EMSC   MOLUCCA SEA                   

P:  7AUG2020 125988     2.0N  128.0E 4.0-5.6 AABAA  Halmahera                  

 

O:  9AUG2020 03:43:54   3.3S  137.8E ML=4.1  EMSC   PAPUA, INDONESIA             

P:  3AUG2020 126018     4.0S  137.0E 4.0-5.6 CAAAA  West Irian, PNG             

 

O:  8AUG2020 22:29:47   6.2S  130.0E mb=4.1  EMSC   BANDA SEA                    

P: 10AUG2020 126020     7.0S  130.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

 

O: 08AUG2020 10:45:49   9.7S  119.0E Mw=5.3  EMSC   SUMBAWA REGION, INDONESIA

O: 08AUG2020 10:49:13   9.7S  119.1E ML=4.5  EMSC   SUMBA REGION, INDONESIA

O: 08AUG2020 16:32:31   9.7S  119.0E Mw=4.9  EMSC   SUMBAWA REGION, INDONESIA

O: 09AUG2020 04:13:33   9.7S  119.0E ML=4.2  EMSC   SUMBA REGION, INDONESIA

O: 09AUG2020 04:52:51   9.7S  119.0E Mw=4.9  EMSC   SUMBAWA REGION, INDONESIA

O: 08AUG2020 10:23:31   9.8S  118.9E Mw=4.8  EMSC   SUMBAWA REGION, INDONESIA

O: 08AUG2020 10:26:34   9.8S  119.1E ML=4.4  EMSC   SUMBA REGION, INDONESIA

O: 08AUG2020 11:37:28   9.8S  118.9E mb=4.4  EMSC   SUMBAWA REGION, INDONESIA

O: 08AUG2020 21:03:17   9.8S  119.0E mb=4.7  EMSC   SUMBAWA REGION, INDONESIA

O: 08AUG2020 11:16:30   9.9S  119.2E ML=4.5  EMSC   SUMBA REGION, INDONESIA

O: 08AUG2020 18:20:46   9.9S  119.0E mb=4.2  EMSC   SUMBAWA REGION, INDONESIA

O:  8AUG2020 10:17:49   9.7S  119.1E Mw=5.1  EMSC   SUMBA REGION, INDONESIA      

P: 11AUG2020 126001     7.0S  120.0E 4.0-5.6 BCAAA  Flores Island area         

 

CENTRAL AND SOUTH AMERICA

 

O:  8AUG2020 07:14:17   6.2S   75.8W mb=4.3  EMSC   NORTHERN PERU                

P: 11AUG2020 126009     6.0S   76.0W 4.0-5.4 BAAAA  No. Peru                   

 

O: 08AUG2020 21:18:14  15.4N   94.6W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO

O: 08AUG2020 08:37:41  15.9N   95.1W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO

O:  8AUG2020 17:49:20  15.4N   96.8W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO      

P:  5AUG2020 126044    16.0N   96.0W 3.5-5.6 BAAAA  Oaxaca, Mexico             

 

O:  8AUG2020 18:04:48  16.2N   98.1W ML=4.0  EMSC   OAXACA, MEXICO               

P:  6AUG2020 126042    16.0N   98.0W 3.5-5.7 AAAAA  Oaxaca, Mexico             

 

O:  9AUG2020 03:56:00  17.4N   95.0W ML=4.1  EMSC   VERACRUZ, MEXICO             

P: 10AUG2020 126027    17.0N   94.0W 3.5-5.4 AAAAA  Chiapas, Mexico            

 

O:  8AUG2020 13:16:54  17.9N   67.1W ML=3.0  EMSC   PUERTO RICO REGION           

O: 08AUG2020 23:22:55  17.9N   66.9W ML=3.4  EMSC   PUERTO RICO REGION

O: 08AUG2020 23:45:11  17.9N   66.9W ML=3.0  EMSC   PUERTO RICO REGION

O: 08AUG2020 23:56:23  18.0N   66.8W MD=3.1  EMSC   PUERTO RICO REGION

P:  6AUG2020 126045    18.0N   67.0W 3.4-4.9 AAAAA  Puerto Rico                

 

O:  9AUG2020 04:15:18  18.0N  103.5W ML=4.0  EMSC   OFFSHORE MICHOACAN, MEXICO   

P:  8AUG2020 126036    18.0N  104.0W 3.5-5.2 AAAAA  Michoacan, Mexico           

 

O:  8AUG2020 21:33:41  18.9N  107.2W ML=4.1  EMSC   OFF COAST OF JALISCO, MEXICO 

P: 11AUG2020 126029    18.0N  106.0W 3.5-5.3 BAAAA  Coast of Jalisco, Mexico   

 

O:  8AUG2020 10:01:11  24.1S   66.7W mb=4.4  EMSC   JUJUY, ARGENTINA              

P:  7AUG2020 126208    24.0S   68.0W 4.0-5.8 AAAAA  Argentina                  

 

AFRICA AND EUROPE

 

O:  8AUG2020 23:00:31  36.6N    2.0E mb=4.4  EMSC   NORTHERN ALGERIA             

P:  5AUG2020 126119    37.0N    3.0E 3.0-4.5 BAAAA  Western Mediterranean      

 

O:  9AUG2020 06:11:18  37.8N   21.1E ML=4.5  EMSC   SOUTHERN GREECE              

P:  6AUG2020 126091    37.0N   22.0E 3.0-4.4 BAAAA  No. Greece                 

 

NEIC reported this earthquake of M 4.2 in  Greece was felt with intensity II-III in the area(s) of Zakinthos, Greece in Kalamakion, Mpokhali, Planos, Pantokrator.

 

O:  8AUG2020 19:44:45  47.2N   10.7E ML=4.0  EMSC   AUSTRIA                      

P:  6AUG2020 126122    46.0N   12.0E 3.0-5.0 ABAAA  Austria                    

 

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:  8AUG2020 14:26:00   9.2N   40.5W mb=4.9  EMSC   CENTRAL MID-ATLANTIC RIDGE   

 

O:  8AUG2020 23:34:56  54.0S  159.1E mb=4.7  EMSC   MACQUARIE ISLAND REGION      

O:  8AUG2020 18:12:37  54.0S  159.1E mb=4.8  EMSC   MACQUARIE ISLAND REGION      

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  9AUG2020 03:43:23  37.2S  179.1E ML=3.6  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  6AUG2020 126225    38.0S  178.0E 3.0-4.5 BAAAA  North Island, N.Z.         

 

O:  8AUG2020 07:51:32  41.9S  173.0E Mw=4.3  EMSC   SOUTH ISLAND OF NEW ZEALAND  

P:  7AUG2020 126233    42.0S  173.0E 3.0-5.1 AAAAA  So. Island, N.Z.           

 

O:  8AUG2020 18:14:32  47.6S  167.5E ML=3.9  EMSC   OFF W. COAST OF S. ISLAND, N.Z

P: 10AUG2020 126234    45.0S  168.0E 3.0-5.0 ACAAA  So. Island, N.Z.           

 

O:  8AUG2020 23:34:56  54.0S  159.1E mb=4.7  EMSC   MACQUARIE ISLAND REGION      

O:  8AUG2020 18:12:37  54.0S  159.1E mb=4.8  EMSC   MACQUARIE ISLAND REGION      

 

JAPAN AND KURIL ISLANDS

 

O:  8AUG2020 11:55:30  28.6N  129.6E ML=4.1  EMSC   RYUKYU ISLANDS, JAPAN        

P:  3AUG2020 126058    29.0N  130.0E 4.0-5.4 BAAAA  Kyushu Japan               

 

O:  8AUG2020 08:37:00  36.6N  141.2E mb=4.4  EMSC   NEAR EAST COAST OF HONSHU, JAP

O:  9AUG2020 05:30:30  37.5N  141.5E ML=4.1  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  6AUG2020 126097    37.0N  142.0E 4.0-5.4 BAAAA  Off East Coast Honshu      

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  8AUG2020 23:18:10  31.5N  114.5W ML=2.8  EMSC   GULF OF CALIFORNIA            

P:  6AUG2020 126102    32.4N  115.8W 2.5-4.4 AAAAA  So. California             

 

O: 08AUG2020 12:49:50  32.9N  115.5W Ml=2.0  EMSC   SOUTHERN CALIFORNIA

O: 08AUG2020 12:42:19  32.9N  115.5W Ml=2.4  EMSC   SOUTHERN CALIFORNIA

O: 09AUG2020 02:45:11  33.0N  115.9W ML=2.8  EMSC   SOUTHERN CALIFORNIA

O: 09AUG2020 01:14:48  33.0N  115.9W Ml=2.2  EMSC   SOUTHERN CALIFORNIA

O: 09AUG2020 01:11:06  33.0N  115.9W Ml=2.0  EMSC   SOUTHERN CALIFORNIA

O:  8AUG2020 23:40:31  33.2N  115.6W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P:  6AUG2020 126102    32.4N  115.8W 2.5-4.4 AAAAA  So. California             

P: 11AUG2020 126102    32.8N  116.0W 2.5-4.5 BAAAA  So. California             

 

NEIC reported this earthquake of M 2.8 in Southern California  was felt with intensity II-III in the area(s) of Southern California at Del Mar and San Diego.

 

O:  8AUG2020 23:57:26  35.8N  117.5W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

O:  8AUG2020 13:26:51  35.9N  117.7W ML=2.4  EMSC   CENTRAL CALIFORNIA            

P:  6AUG2020 126107    35.7N  117.6W 2.5-4.4 AAAAA  So. California             

 

O:  8AUG2020 08:17:06  36.2N  120.8W Md=2.3  EMSC   CENTRAL CALIFORNIA           

P:  5AUG2020 126076    36.2N  120.8W 2.5-4.6 BAAAA  Central California         

 

O:  8AUG2020 12:05:14  36.5N  118.0W Ml=2.1  EMSC   CENTRAL CALIFORNIA           

P: 10AUG2020 126071    37.1N  117.8W 2.5-4.4 AAAAA  California/Nevada area     

 

O:  8AUG2020 20:16:37  36.7N  121.3W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P: 10AUG2020 126076    36.6N  120.7W 2.5-4.4 AAAAA  Central California         

 

O:  8AUG2020 14:57:57  37.2N  117.1W ml=2.2  EMSC   NEVADA                       

P: 10AUG2020 126071    37.1N  117.8W 2.5-4.4 AAAAA  California/Nevada area     

 

O: 08AUG2020 19:38:47  38.2N  117.9W ML=2.9  EMSC   NEVADA

O: 08AUG2020 19:25:39  38.2N  117.8W ml=2.2  EMSC   NEVADA

O:  8AUG2020 20:01:09  38.2N  117.9W ml=2.3  EMSC   NEVADA                       

P:  7AUG2020 126071    37.5N  117.8W 2.5-4.4 AAAAA  California/Nevada area      

 

O:  8AUG2020 14:00:57  38.8N  122.8W Md=2.0  EMSC   NORTHERN CALIFORNIA          

P:  6AUG2020 126079    38.7N  122.7W 2.5-4.4 AAAAA  Central California         

 

O: 09AUG2020 00:00:34  40.3N  124.7W Mw=3.7  EMSC   OFFSHORE NORTHERN CALIFORNIA

O:  9AUG2020 03:23:49  40.3N  124.9W ML=3.1  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  6AUG2020 126143    40.2N  124.2W 2.5-4.6 BAAAA  Off Coast of No. Calif     

 

ALASKA

 

O:  8AUG2020 12:31:52  52.1N  176.7E mb=4.4  EMSC   RAT ISLANDS, ALEUTIAN ISLANDS

P:  6AUG2020 126174    51.0N  176.0E 4.0-5.9 ABAAA  Rat Islands                

 

O:  8AUG2020 20:32:26  52.4N  169.6W mb=3.7  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P:  5AUG2020 126162    52.2N  171.5W 3.5-5.1 BAAAA  Andreanoff Isls, Aleutians 

 

O: 08AUG2020 16:12:02  54.7N  161.1W ML=3.4  EMSC   ALASKA PENINSULA

O: 09AUG2020 01:51:41  54.7N  161.2W mb=4.5  EMSC   ALASKA PENINSULA

O: 09AUG2020 03:30:21  54.7N  161.0W mb=3.9  EMSC   ALASKA PENINSULA

O: 08AUG2020 14:42:54  54.8N  161.2W Mw=5.5  EMSC   ALASKA PENINSULA

O: 08AUG2020 18:13:19  54.8N  161.2W ml=3.5  EMSC   ALASKA PENINSULA

O:  9AUG2020 06:39:49  54.6N  161.1W ML=3.3  EMSC   ALASKA PENINSULA             

P:  7AUG2020 126177    54.7N  161.2W 3.5-5.1 AAAAA  Unimak Islands, Aleutians  

 

O:  8AUG2020 12:53:00  55.0N  158.5W Mw=5.4  EMSC   SOUTH OF ALASKA              

P:  5AUG2020 126166    55.1N  159.3W 3.5-4.9 BAAAA  Alaska Peninsula           

 

O:  8AUG2020 22:54:18  59.8N  153.6W mb=4.4  EMSC   SOUTHERN ALASKA              

P:  9AUG2020 126182    60.2N  153.2W 3.2-5.2 AAAAA  Central Alaska             

 

O:  9AUG2020 05:19:44  60.7N  143.0W ML=4.1  EMSC   SOUTHERN ALASKA              

P:  7AUG2020 126176    59.0N  139.0W 3.0-4.6 ABBAA  Southeast Alaska           

 

NEIC reported this earthquake of M 3.9 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska at Cooper Center.

 

O:  9AUG2020 06:06:24  61.7N  149.6W ML=3.0  EMSC   SOUTHERN ALASKA              

P:  7AUG2020 126184    62.7N  151.6W 3.2-5.1 AAAAA  Central Alaska             

 

O:  8AUG2020 17:22:37  64.1N  149.0W ML=3.6  EMSC   CENTRAL ALASKA               

P:  8AUG2020 126185    63.2N  145.5W 3.2-5.0 AABAA  Central Alaska             

 

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

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  8AUG2020 08:51:25  43.9N  129.0W mb=3.6  EMSC   OFF COAST OF OREGON          

P:  5AUG2020 126145    44.4N  129.3W 3.0-4.5 BAAAA  Off Coast of Oregon        

 

ROCKY MOUNTAINS REGION

 

O:  8AUG2020 07:55:30  37.9N  113.0W ML=3.0  EMSC   UTAH                         

P:  7AUG2020 126117    38.6N  112.7W 2.0-3.9 AAAAA  Utah area                  

 

O: 08AUG2020 08:34:28  44.2N  115.1W ML=2.6  EMSC   SOUTHERN IDAHO

O: 08AUG2020 15:56:00  44.5N  115.2W ML=2.8  EMSC   SOUTHERN IDAHO

O: 08AUG2020 16:03:24  44.5N  115.2W ML=2.5  EMSC   SOUTHERN IDAHO

O:  8AUG2020 07:52:57  44.1N  115.1W ML=3.0  EMSC   SOUTHERN IDAHO               

P:  6AUG2020 126133    44.5N  115.1W 2.0-4.2 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O:  9AUG2020 06:33:47  32.9N   96.9W mb=2.3  EMSC   NORTHERN TEXAS               

P:  5AUG2020 126113    35.0N   96.0W 2.0-4.0 BCAAA  Southern Plains            

 

O: 08AUG2020 11:05:39  36.5N   81.1W ML=2.0  EMSC   VIRGINIA-N CAROLINA BORDER REG

O: 08AUG2020 11:12:32  36.5N   81.1W Md=2.3  EMSC   VIRGINIA-N CAROLINA BORDER REG

O: 09AUG2020 05:57:16  36.5N   81.1W mb=2.7  EMSC   VIRGINIA-N CAROLINA BORDER REG

O:  9AUG2020 12:07:37  36.5N   81.1W Mw=5.1  EMSC   VIRGINIA-N CAROLINA BORDER REG

O:  9AUG2020 12:07:37  36.5N   81.1W Mw=5.2  ANSS   VIRGINIA-N CAROLINA BORDER REG

P:  9AUG2020 126086    37.2N   81.9W 2.0-4.2 AAAAA  Kentucky/Tennessee/NC      

 

HAWAII

 

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

 

 

MODERATE QUAKE RATTLES NORTHERN XINJIANG, CHINA

 

EARTHQUAKE SUMMARY FOR AUGUST 7, 2020

 

A moderate earthquake of M 5.3 shook regions of northern Xinjiang, China today.

NEIC reported this earthquake of M 5.3 in northern Xinjiang, China  was felt with intensity II-III in the area(s) of northern Xinjiang, China at Urumqi.

It was not reported with damage. This is the strongest earthquake in northern

Xinjiang, China within about 250 km of this epicenter since an M 5.5 about 100 km to the west on March 29, 2013.  Forecast 126130 had expected today's activity to the southwest was likely around August 10. Recent flooding in China may have helped promote this activity.

 

O:  8AUG2020 00:35:07  43.3N   87.7E mb=5.3  EMSC   NORTHERN XINJIANG, CHINA     

P: 10AUG2020 126130    42.0N   83.0E 4.0-5.4 ABCAA  Kirgizstan/Xinjiang        

 

An unusual visitor to modern seismicity occurred today in the Gilbert Islands, Kiribati area of the Pacific Ocean with  4.8.     This is the strongest earthquake in the Gilbert Islands regions within about 400 km of this epicenter in at least 30 years. A major swarm hit the region beginning in late 1981 and lasting through March, 1983 with many moderately large earthquakes. The area has been quiet since that time. There are no major tectonic features suggesting the region should be subject to this type of seismicity so this swarm remains largely unexplained. Today's event bears watching as it may be the first in renewed regional activity in this area.

 

O:  7AUG2020 14:12:56   3.6S  177.6E mb=4.8  EMSC   GILBERT ISLANDS, KIRIBATI REGI

 

A moderate aftershock in southern Idaho occurred today with M 4.2. NEIC reported it was felt with maximum intensity V in Idaho at Ketchum and IV in Lowman with II-III shaking in Stanley, Idaho City, Horseshoe Bend, Hailey, Garden City, Boise and Mountain Home and in general within about 100 km of the epicenter. This is the strongest aftershock in this long-lasting aftershock sequence of the M 6.5 of March 31, 2020 since an M 4.6 on June 25, 2020. Forecast 126133 had expected today's event within about 25 km was likely around August 6.

 

O:  8AUG2020 02:11:30  44.2N  115.1W mb=4.2  EMSC   SOUTHERN IDAHO               

P:  6AUG2020 126133    44.5N  115.1W 2.0-4.2 AAAAA  Montana/Idaho              

 

High latitude seismicity in the Arctic Ocean continued today was an M 4.5 in the Svalard region and an M 4.6 in Iceland. The event in Svalbard is the strongest in that region within about 250 km since an M 4.5 on May 10, 2020 although more recent events of M 5.0-5.2 have occurred on June 5 and most recently north ot this on August 5 (M 5.3) in this region. This summary noted the event on August 5 as:

 

"An unusual M 5.3 struck near the North Pole north of Svalbard today. It was not reported felt in this remote area. This is the farthest north of any event of M>=5.3 in at least 30 years. Activity had been expected at high latitudes such as this associated with the geomagnetic  disturbance as noted in previous issues of this report:

 

"The geomagnetic field saw disturbed conditions today. The AP level was 16.  High latitude geomagnetic field active conditions  with AP at 26. This is the most active the geomagnetic field has been in the past month. The last period of more disturbance was on April 20, 2020 when AP was 18. Moderate geomagnetic storms such as this can help promote seismicity at high latitudes and near the geomagnetic equator within several days of the storm.." (August 3-5, 6, 2020)

 

Forecast 125923 had expected today's event within about 50 km was likely at the end of July or in early August.

 

O:  7AUG2020 13:18:57  78.6N    7.1E mb=4.5  EMSC   SVALBARD REGION              

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 CAAAA  Arctic Ocean Region        

 

The M 4.6 in Iceland is the strongest in that area since an M 6.0 shook the area on June 21, 2020. Forecast 126186 had expected this activity was likely to the southeast around August 7.

 

O: 08AUG2020 03:52:58  66.3N   18.4W ML=3.7  EMSC   ICELAND REGION

O:  8AUG2020 03:42:33  66.3N   18.4W ML=4.6  EMSC   ICELAND REGION               

P:  7AUG2020 126186    65.0N   16.0W 3.0-4.8 ABAAA  Iceland area               

 

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

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

 

ASIA

 

O:  7AUG2020 17:36:20  24.6N   94.9E mb=4.3  EMSC   MYANMAR-INDIA BORDER REGION  

P:  9AUG2020 126060    25.0N   95.0E 4.0-5.8 AAAAA  Myanmar                    

 

O:  7AUG2020 23:56:15  26.6N   92.6E ML=3.5  EMSC   ASSAM, INDIA                 

P:  7AUG2020 126060    26.0N   93.0E 4.0-5.4 AAAAA  Myanmar                    

 

O:  8AUG2020 00:35:07  43.3N   87.7E mb=5.3  EMSC   NORTHERN XINJIANG, CHINA     

P: 10AUG2020 126130    42.0N   83.0E 4.0-5.4 ABCAA  Kirgizstan/Xinjiang        

 

O:  7AUG2020 11:51:36  54.4N  168.9E Mw=5.1  EMSC   KOMANDORSKIYE OSTROVA REGION 

P: 10AUG2020 126169    55.0N  169.0E 4.0-5.9 BAAAA  Near Islands               

 

O:  7AUG2020 20:41:36  58.7N  158.5E mb=4.2  EMSC   KAMCHATKA PENINSULA, RUSSIA  

P:  5AUG2020 126168    56.0N  163.0E 4.0-5.9 ACCAA  Komandorsky Isl            

 

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

 

INDONESIA AND PHILIPPINES

 

O:  7AUG2020 17:49:46   4.7S  102.7E ML=4.3  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  3AUG2020 126015     4.0S  103.0E 4.0-5.4 BAAAA  So. of Sumatera            

 

O:  7AUG2020 16:08:47   7.1S  125.2E ML=4.0  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P:  9AUG2020 125996     6.0S  125.0E 4.0-5.6 ABAAA  Banda Sea                  

 

O:  7AUG2020 15:13:44   7.7S  104.4E mb=4.7  EMSC   SOUTHWEST OF SUMATRA, INDONESI

P:  5AUG2020 126015     7.0S  104.0E 4.0-5.6 AAAAA  So. of Sumatera            

 

O:  8AUG2020 02:19:50   9.8S  119.1E ML=4.4  EMSC   SUMBA REGION, INDONESIA      

P:  3AUG2020 126204    10.0S  116.0E 4.0-5.4 BACAA  Sumbawa Island area        

 

CENTRAL AND SOUTH AMERICA

 

O:  7AUG2020 23:53     33.0S   70.2W mb=4.7  GUC    Santiago at Colina, Curacavi,

P:  6AUG2020 126221    33.0S   70.0W 4.0-5.7 AAAAA  Central Chile              

 

GUC reported this earthquake was felt with intensity III in  Santiago at Colina, Curacavi, Penaflor, San Bernardo, San Jose de Maipo and Santiago; Valparaiso at Olmue, Chile.

NEIC reported this earthquake of M 4.7 in Central Chile was felt with intensity II-III in the area(s) of Central Chile a Santiago, Lampa, Puente Alto, San Bernardo and Milipilla.

 

O:  8AUG2020 02:16:34  11.2S   75.9W mb=5.0  EMSC   CENTRAL PERU                 

P:  8AUG2020 126196    14.0S   73.0W 4.0-5.6 ACCAA  Central Peru               

 

NEIC reported this earthquake of M 5.0 in Central Peru  was felt with intensity II-III in the area(s) of Central Peru at Junin (V) and in Nicolas de Pierola, Arequipa, Huancayo and San Luis, Lima.

 

O:  8AUG2020 06:26:55  11.4S  118.8E ML=4.8  EMSC   SOUTH OF SUMBAWA, INDONESIA  

P: 27JUL2020 125937    11.0S  119.0E 4.0-5.5 CAAAA  So. of Indonesia           

 

O:  8AUG2020 06:07:33  14.2N   92.7W ML=4.2  EMSC   OFFSHORE CHIAPAS, MEXICO     

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 AAAAA  Chiapas, Mexico            

 

O:  8AUG2020 06:00:29  15.4N   96.2W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P:  7AUG2020 126026    15.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O:  7AUG2020 14:27:31  18.0N   68.5W ML=3.5  EMSC   DOMINICAN REPUBLIC REGION    

O: 07AUG2020 08:46:03  19.0N   67.8W ML=3.2  EMSC   DOMINICAN REPUBLIC REGION

P: 11AUG2020 126046    18.0N   68.0W 3.4-5.1 BAAAA  Puerto Rico                

 

O: 07AUG2020 16:02:28  19.1N   70.3W ML=3.3  EMSC   DOMINICAN REPUBLIC

O: 07AUG2020 11:15:36  19.6N   70.6W ML=3.3  EMSC   DOMINICAN REPUBLIC

O: 07AUG2020 08:13:04  20.1N   70.7W ML=3.1  EMSC   DOMINICAN REPUBLIC REGION

O: 07AUG2020 14:50:23  20.1N   70.8W ML=3.5  EMSC   DOMINICAN REPUBLIC REGION

O: 07AUG2020 14:54:01  20.1N   70.8W ML=3.5  EMSC   DOMINICAN REPUBLIC REGION

O:  7AUG2020 14:33:11  20.1N   71.0W ML=3.5  EMSC   DOMINICAN REPUBLIC REGION    

P:  6AUG2020 126052    20.0N   71.0W 3.0-4.5 AAAAA  Bahamas/No. Caribbean      

 

O:  7AUG2020 23:07:05  21.2S   68.6W mb=4.1  EMSC   ANTOFAGASTA, CHILE           

P:  5AUG2020 126208    21.0S   67.0W 4.0-6.1 AABAA  Argentina                  

 

O:  7AUG2020 23:53:53  33.0S   70.2W Mw=4.7  EMSC   VALPARAISO, CHILE            

P:  6AUG2020 126221    33.0S   70.0W 4.0-5.7 AAAAA  Central Chile              

 

AFRICA AND EUROPE

 

O:  7AUG2020 11:13:34  36.5N    6.3E mb=4.5  EMSC   NORTHERN ALGERIA             

P:  5AUG2020 126119    37.0N    3.0E 3.0-4.5 AABAA  Western Mediterranean      

 

NEIC reported this earthquake of M 4.5 in Northern Algeria  was felt with intensity II-III in the area(s) of Northern Algeria at Ayn Samara, Salgum-al-Ayd, Milah and al-Qull Sakikdah.

 

O:  7AUG2020 19:20:13  38.1N   42.6E mb=4.4  EMSC   EASTERN TURKEY                

P: 11AUG2020 126116    38.0N   43.0E 3.5-5.1 BAAAA  Turkey                     

 

O:  7AUG2020 13:18:57  78.6N    7.1E mb=4.5  EMSC   SVALBARD REGION              

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 CAAAA  Arctic Ocean Region        

 

O: 08AUG2020 03:52:58  66.3N   18.4W ML=3.7  EMSC   ICELAND REGION

O:  8AUG2020 03:42:33  66.3N   18.4W ML=4.6  EMSC   ICELAND REGION               

P:  7AUG2020 126186    65.0N   16.0W 3.0-4.8 ABAAA  Iceland area               

 

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

 

SOUTHWEST PACIFIC

 

O:  7AUG2020 14:12:56   3.6S  177.6E mb=4.8  EMSC   GILBERT ISLANDS, KIRIBATI REGI

 

O:  7AUG2020 21:47:56  21.2S  178.6W mb=4.5  EMSC   FIJI REGION                  

P:  4AUG2020 126218    20.0S  175.0W 4.0-5.8 BBCAA  Tonga Islands              

 

O:  7AUG2020 15:40:25  23.5S  179.7W mb=4.6  EMSC   SOUTH OF FIJI ISLANDS        

P: 10AUG2020 126219    25.0S  180.0W 4.0-5.4 BBAAA  Tonga Islands              

 

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

 

OCEAN RIDGES

 

O:  7AUG2020 13:18:57  78.6N    7.1E mb=4.5  EMSC   SVALBARD REGION              

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 CAAAA  Arctic Ocean Region        

 

O: 08AUG2020 03:52:58  66.3N   18.4W ML=3.7  EMSC   ICELAND REGION

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  7AUG2020 08:28:39  31.6S  179.8E ML=4.4  EMSC   KERMADEC ISLANDS REGION       

O:  7AUG2020 21:52:31  33.3S  179.3E ML=4.0  EMSC   SOUTH OF KERMADEC ISLANDS    

P:  8AUG2020 126229    31.0S  180.0E 4.0-5.5 ACAAA  So. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O:  8AUG2020 01:39:53  44.7N  146.4E mb=4.1  EMSC   KURIL ISLANDS                

P:  9AUG2020 126127    43.0N  146.0E 3.5-5.7 ABAAA  Hokkaido, Japan            

 

O:  8AUG2020 04:24:14  50.4N  157.1E mb=4.5  EMSC   KURIL ISLANDS                

P:  6AUG2020 126137    49.0N  156.0E 3.5-5.4 ABAAA  NE Pacific                  

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  7AUG2020 22:15:38  33.7N  116.7W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P:  4AUG2020 126103    33.4N  116.7W 2.5-4.6 BAAAA  So. California             

 

O:  7AUG2020 12:08:58  35.9N  117.7W Ml=2.3  EMSC   CENTRAL CALIFORNIA           

P:  6AUG2020 126107    35.7N  117.6W 2.5-4.4 AAAAA  So. California             

 

O:  7AUG2020 12:51:51  36.1N  120.0W Md=2.1  EMSC   CENTRAL CALIFORNIA           

P:  5AUG2020 126076    36.2N  120.8W 2.5-4.6 AAAAA  Central California         

 

O:  7AUG2020 13:12:22  38.8N  122.4W Md=2.5  EMSC   NORTHERN CALIFORNIA          

P:  6AUG2020 126079    38.7N  122.7W 2.5-4.4 AAAAA  Central California         

 

O:  8AUG2020 06:08:38  39.5N  120.4W Md=2.5  EMSC   NORTHERN CALIFORNIA          

P:  7AUG2020 126080    39.4N  120.5W 2.5-4.4 AAAAA  Central California         

 

O: 08AUG2020 03:57:00  38.1N  118.0W ml=2.4  EMSC   NEVADA

O: 08AUG2020 00:19:53  38.2N  118.0W ML=2.3  EMSC   NEVADA

O: 08AUG2020 00:17:48  38.2N  118.0W ml=2.4  EMSC   NEVADA

O: 07AUG2020 19:31:12  38.1N  118.0W ML=2.2  EMSC   NEVADA

O: 07AUG2020 14:38:21  38.1N  118.2W ml=2.1  EMSC   NEVADA

O: 07AUG2020 14:27:39  38.2N  118.0W ml=2.3  EMSC   NEVADA

O: 07AUG2020 14:13:02  38.2N  118.0W ML=2.6  EMSC   NEVADA

O:  7AUG2020 12:10:57  38.2N  117.9W ml=2.5  EMSC   NEVADA                       

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 AAAAA  California/Nevada area     

 

ALASKA

 

O: 07AUG2020 11:34:56  54.6N  161.1W ml=3.4  EMSC   ALASKA PENINSULA

O:  7AUG2020 11:33:28  54.5N  161.0W mb=3.9  EMSC   ALASKA PENINSULA             

P:  8AUG2020 126166    55.0N  161.3W 3.5-4.9 AAAAA  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:  7AUG2020 11:30:19  31.6N  104.2W ML=2.6  EMSC   WESTERN TEXAS                

 

O:  8AUG2020 02:11:30  44.2N  115.1W mb=4.2  EMSC   SOUTHERN IDAHO               

P:  6AUG2020 126133    44.5N  115.1W 2.0-4.2 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O:  7AUG2020 11:38:10  35.2N   92.1W Md=2.1  EMSC   ARKANSAS                     

P:  5AUG2020 126113    35.0N   96.0W 2.0-4.0 AACAA  Southern Plains            

 

O:  7AUG2020 19:04:22  36.5N   99.0W ML=2.1  EMSC   OKLAHOMA                     

P:  4AUG2020 126114    37.0N   98.0W 2.0-3.9 BAAAA  Southern Plains            

 

O:  7AUG2020 16:00:23  36.2N   89.7W Md=2.4  EMSC   SOUTHEASTERN MISSOURI        

P:  7AUG2020 126090    36.0N   89.0W 2.0-4.2 AAAAA  New Madrid area            

 

HAWAII

 

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

 

M 6.3 NEAR ALASKA ANTIPODE IN PRINCE EDWARD ISLAND REGION, INDIAN OCEAN

 

EARTHQUAKE SUMMARY FOR AUGUST 6, 2020

 

Ocean ridges were active today with moderately large to large events in the region of the Prince Edward Islands (M 6.3) and in the Easter Island area of the south Pacific (M 5.4). The largest earthquake in the world today was an  6.3 in the south Indian Ocean near Prince Edward Islands. While not exact, this is in the antipodal region of the M 7.8 in the Alaska Peninsula of July 22, 2020 and may have been promoted by energy from that event as noted in previous issues of this report:

 

"Far field triggering is likely with the earthquake in Alaska. The antipode is located south of South Africa in the Indian Ocean east of Bouvet Island and is a possible site for triggered activity." (July 22, 2020)

 

This epicenter is near the antipode off the coast of Northern California and Oregon and could help enhance seismicity in that area in the next several days. The only events in this area of M>=6.3 in the past 20 years were an M 6.7 on January 22, 2019 and an M 6.3 on July 4, 2005. Forecast 125971 had expected today's activity within about 100 km was likely in late July or early August, 2020.

 

O:  6AUG2020 23:36:45  41.7S   42.5E Mw=6.3  EMSC   PRINCE EDWARD ISLANDS REGION 

P: 30JUL2020 125971    41.0S   43.0E 4.0-5.4 CAAAA  So. Indian Ocean           

 

The earthquake of M 5.5 in the Easter Island region, South Pacific was not felt in that remote area. The last event within about 300 km of this epicenter with M>=5.5 was an M 5.5 on January 23, 2016. Forecast 126214 had expected today's activity about 200 km to the south around August 5.

 

O:  6AUG2020 13:57:37  22.8S  112.4W mb=5.5  EMSC   EASTER ISLAND REGION         

P:  5AUG2020 126214    25.0S  112.0W 4.0-5.4 ACAAA  So. East Pacific Rise      

 

The strongest earthquake felt in the world today was another of M 5.5 in the series in southern Peru which has been ongoing since the M 7.8 in the Alaska Peninsula of July 22. This area is at about 103 degrees from the Alaskan epicenter and subject to triggering from energy concentration related to that event. NEIC reported today's event was felt with intensity V in Acari, Arequipa and II in Marcona, Ica, Peru. There have been several moderately large quakes felt in southern Peru in the past several days. In a previous summary some of this activity was summarized as:

 

 

"The strongest earthquake in the world today was an M 5.5 in northern Chile. NEIC reported it was felt in Northern Chile with IV in Iquique, Tarapaca and in Arica and Calama, Antofagasta and in southern Peru with II-III in Arequipa and Tacna. This area has been active with moderate earthquakes since the M 7.8 in the Alaska Peninsula of July 22. It is located at 102-104 degrees from that epicenter and is likely being promoted by concentrated energy from that source.

GUC reported this earthquake was felt with intensity V in  Tarapaca at Camina, La Tirana; IV in Alto Hospicio, Huara, Iquique, Mamina, Pica; III in Pisagua and Pozo Almonte; in Arica with IV in Codpa and Cuya and III in Arica, San Miguel de Azapa and Cocon Chile, Chile. An aftershock about 100 km to the south occurred later with M 4.5-4.7. GUC reported the earthquake of M 4.5 was felt with intensity IV in  Tarapaca at Pica; III in Alto Hospicio and Iquique and II in Camina and in Arica at Arica with intensity III, Chile. NEIC reported this earthquake of M 4.7 in northern Chile  was felt with intensity II-III in the area(s) of northern Chile at Iquique, Tarapaca. The only similar event within about 100 km of this epicenter in the past two years was an M 6.3 6.2 on November 1, 2018 near today's epicenter. Forecasts 126217 and 126203 had expected today's activity within this area was likely around August 4-5. Other recent activity in southern Peru and northern Chile commented on in this summary may have been precursory to today's event. This event is at 104-105 degrees from the M 7.8 of July 22 n the Alaska Peninsula and was probably promoted by energy from that source." (August 4, 2020)

 

Forecasts 126196 and 126202 had expected this activity in early August in southern Peru. Today's epicenter is at 101-102 degrees from the western edge of the Alaska Peninsula M 7.8 of July 22, the region current showing the most aftershock activity.

 

O:  6AUG2020 22:18:06  15.9S   74.9W Mw=5.5  EMSC   NEAR COAST OF SOUTHERN PERU  

P:  8AUG2020 126202    16.0S   72.0W 4.0-5.7 AABAA  So. Peru/Bolivia           

P: 11AUG2020 126196    15.0S   76.0W 4.0-5.4 BAAAA  Central Peru               

 

An earthquake of M 4.9 was widely felt with minor damage in Algeria today. NEIC reported maximum intensity IV in Algeria at Qararim, Milah; V in Constantine, IV in Ruwasad, Faji Mazallah, Hamma, Ayn Samara, al-Hurub and III in Tamalus and al-Harus. Two similar events hit northern Algeria in the past year - an M 5.0 on March 24 and an M 4.9 on January 24, 2020. These events occurred northwest of today's epicenter. An earthquake of M 4.6 in Northern Algeria occurred on July 4, 2020 and two of M 4.5 hit south of today's event on July 14 and 17, part of a minor regional swarm. Forecast 126119 had expected today's activity was likely to the west of this epicenter around August 5. This is at the fifth node (72 degrees) from the M 7.8 in the Alaska Peninsula of July 22 and at twice this distance (144 degrees) from the M 6.8 in New Guinea and may have been promoted by energy from these sources. Puerto Rico often sees enhanced seismicity at this time of year due to interactions of strong hurricanes with regional plates. The last great tsunami-genic earthquake in the region of Puerto Rico occurred 74 year ago as an M 8.0+ event on August 4, 1946 in the Puerto Rico trench far to the north of today's epicenter. A repeat of this event is overdue in the area.

 

O:  7AUG2020 06:15:37  36.5N    6.3E Mw=4.9  EMSC   NORTHERN ALGERIA             

O:  6AUG2020 15:09:24  36.9N    5.9E mb=4.1  EMSC   NORTHERN ALGERIA             

P:  5AUG2020 126119    37.0N    3.0E 3.0-4.5 AABAA  Western Mediterranean      

 

An aftershock of M 4.8-5.1 in the southern region of Puerto Rico was felt throughout the island today. NEIC reported maximum intensity IV in Yauco, Adjuntas, Laja, Lares, Hatillo and II-III at Ponce, Ciales, Cabo Rojo, Isabela and Corozal among other communities in Puerto Rico. The last earthquake in the southern aftershock of M>=5.1 was an M 5.3 on July 3, 2020. These are the strongest far-period aftershocks of the M 6.5 in the area of January 7, 2020. An M 5.3-5.4 also hit the area on May 2, 2020, the first such from mid-January through July. Forecast 126045 had expected today's event was likely within  the aftershock zone around August 6.

 

O:  6AUG2020 22:28:49  17.9N   66.7W mb=4.0  EMSC   PUERTO RICO REGION           

O:  7AUG2020 03:26:59  18.0N   66.8W mb=5.1  EMSC   PUERTO RICO REGION            

P:  6AUG2020 126045    18.0N   67.0W 3.4-4.9 AAAAA  Puerto Rico                

 

An unusually large M 5.4 also occurred in the Buru area of Indonesia today.

The last earthquake within about 200 km of this epicenter with M>=5.4 was an

M 5.6 on June 9, 2020, the only such event since a similar M 5.6 on October 11, 2018. Forecast 125999 had expected today's event within about 100 km was likely around

August 5.

 

O:  7AUG2020 03:00:39   3.8S  126.3E Mw=5.4  EMSC   BURU, INDONESIA              

P:  5AUG2020 125999     4.0S  127.0E 4.0-5.4 AAAAA  Ceram area                 

 

An earthquake of M 3.0 was widely felt south of San Francisco, California today. It was reported with intensity II-III in California at Pescadero, Davenport, Santa Cruz, Boulder Creek, Felton, Scotts Valley, Portola Valley, Los Altos and Los Gatos among others. It occurred at a somewhat unusual epicenter off the coast. In the past unusual quake off the coast of central California have occasionally been followed within days by larger events on the San Andreas Fault Zone.  The last such event of M>=3 off the coast of southern San Francisco was an  M 3.4 on June 4, 2016. An M 2.8-2.9 hit near this epicenter on June 23, 2020, the last of M>=2.8 since an M 2.8 on June 22, 2018. Forecast 126078 had expected today's activity was likely around August 7.

 

O:  6AUG2020 16:00:27  37.1N  122.4W ML=2.7  EMSC   OFFSHORE NORTHERN CALIFORNIA 

O:  6AUG2020 16:00:27  37.1N  122.4W ML=3.0  ANSS   OFFSHORE NORTHERN CALIFORNIA 

P:  7AUG2020 126078    37.3N  121.6W 2.5-4.5 AAAAA  Central California         

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

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

 

ASIA

 

O:  6AUG2020 22:17:30  28.1N   56.8E mb=4.7  EMSC   SOUTHERN IRAN                

P:  4AUG2020 126064    28.0N   56.0E 3.5-5.1 AAAAA  So. Iran/Persian Gulf      

 

O:  6AUG2020 09:08:14  28.4N  105.0E mb=4.6  EMSC   EASTERN SICHUAN, CHINA       

P: 29JUL2020 125780    28.0N  101.0E 4.0-5.6 CACAA  Myanmar                    

 

O:  7AUG2020 03:41:13  52.4N  158.9E mb=4.9  EMSC   NEAR EAST COAST OF KAMCHATKA 

P:  8AUG2020 126167    52.0N  159.0E 4.0-6.0 AAAAA  Kamchatka                  

 

NEIC reported this earthquake of M 4.9 in Kamchatka, Russia  was felt with intensity II-III in the area(s) of Kamchatka, Russia at Petropavlovsk.

 

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

 

INDONESIA AND PHILIPPINES

 

O:  6AUG2020 07:56:10   0.6N  122.7E ML=4.0  EMSC   MINAHASA, SULAWESI, INDONESIA

P:  7AUG2020 125981     0.0N  122.0E 4.0-5.5 AAAAA  Celebes Sea                

 

O:  7AUG2020 06:30:48   2.3N  126.8E mb=4.8  EMSC   MOLUCCA SEA                  

P:  7AUG2020 125988     2.0N  128.0E 4.0-5.6 AABAA  Halmahera                  

 

O:  6AUG2020 10:12:56   3.7N   95.6E mb=4.8  EMSC   OFF W COAST OF NORTHERN SUMATR

P: 29JUL2020 125714     4.0N   95.0E 4.0-5.6 CAAAA  Nicobar Islands            

 

O:  6AUG2020 14:03:11   3.8N  126.1E ML=4.0  EMSC   KEPULAUAN TALAUD, INDONESIA  

P:  4AUG2020 125990     4.0N  125.0E 4.0-5.6 AAAAA  Mindanao, Philippines      

 

O:  7AUG2020 03:00:39   3.8S  126.3E Mw=5.4  EMSC   BURU, INDONESIA              

P:  5AUG2020 125999     4.0S  127.0E 4.0-5.4 AAAAA  Ceram area                 

 

O:  6AUG2020 20:05:23   4.0S  131.5E ML=4.3  EMSC   CERAM SEA, INDONESIA         

P:  4AUG2020 126018     1.0S  133.0E 4.0-5.4 ACBAA  West Irian, PNG            

 

O:  6AUG2020 15:40:38   4.7N  127.4E mb=4.8  EMSC   KEPULAUAN TALAUD, INDONESIA  

P:  4AUG2020 125990     4.0N  125.0E 4.0-5.6 AACAA  Mindanao, Philippines      

 

O:  6AUG2020 08:34:46   5.5S  147.1E mb=4.8  EMSC   EASTERN NEW GUINEA REG., P.N.G

P:  7AUG2020 126006     6.0S  147.0E 4.0-5.8 AAAAA  New Ireland                

 

O:  6AUG2020 11:06:23   6.6S  155.0E mb=4.7  EMSC   BOUGAINVILLE REGION, P.N.G.  

P:  3AUG2020 126016     7.0S  155.0E 4.0-5.4 BAAAA  Solomon Islands            

 

O:  7AUG2020 01:29:38   7.5S  128.6E mb=4.5  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P:  9AUG2020 125996     7.0S  129.0E 4.0-5.6 AAAAA  Banda Sea                  

 

O:  6AUG2020 20:47:15   9.8S  119.1E ML=4.3  EMSC   SUMBA REGION, INDONESIA      

P: 11AUG2020 126001     7.0S  120.0E 4.0-5.6 BCAAA  Flores Island area          

P: 27JUL2020 125937    11.0S  119.0E 4.0-5.5 CBAAA  So. of Indonesia           

 

 

CENTRAL AND SOUTH AMERICA

 

O:  6AUG2020 19:01:44   2.2S   79.9W ML=3.9  EMSC   NEAR COAST OF ECUADOR        

P:  8AUG2020 126000     2.0S   78.0W 4.0-5.8 AABAA  Ecuador                     

 

O:  6AUG2020 15:29:30  10.9N   85.2W ML=4.1  EMSC   COSTA RICA                   

P:  7AUG2020 126038    10.0N   86.0W 3.5-5.3 AAAAA  Nicaragua                  

 

O: 06AUG2020 20:51:47  15.5N   96.5W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO

O: 07AUG2020 06:34:12  15.8N   95.5W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO

O:  7AUG2020 02:23:31  15.9N   95.1W ML=4.3  EMSC   OFFSHORE OAXACA, MEXICO      

P:  7AUG2020 126026    15.0N   95.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O:  6AUG2020 22:18:06  15.9S   74.9W Mw=5.5  EMSC   NEAR COAST OF SOUTHERN PERU  

P:  8AUG2020 126202    16.0S   72.0W 4.0-5.7 AABAA  So. Peru/Bolivia           

P: 11AUG2020 126196    15.0S   76.0W 4.0-5.4 BAAAA  Central Peru               

 

O:  6AUG2020 22:28:49  17.9N   66.7W mb=4.0  EMSC   PUERTO RICO REGION           

O:  7AUG2020 03:26:59  18.0N   66.8W mb=5.1  EMSC   PUERTO RICO REGION           

P:  6AUG2020 126045    18.0N   67.0W 3.4-4.9 AAAAA  Puerto Rico                

 

O:  7AUG2020 04:47:23  20.1N   70.7W ML=3.2  EMSC   DOMINICAN REPUBLIC REGION    

P:  6AUG2020 126052    20.0N   71.0W 3.0-4.5 AAAAA  Bahamas/No. Caribbean      

 

 

O:  6AUG2020 16:43:14  28.0N  112.5W ML=3.8  EMSC   GULF OF CALIFORNIA           

P: 30JUL2020 125774    25.0N  113.0W 3.5-4.9 CCAAA  Gulf of California         

 

AFRICA AND EUROPE

 

O:  7AUG2020 06:15:37  36.5N    6.3E Mw=4.9  EMSC   NORTHERN ALGERIA             

O:  6AUG2020 15:09:24  36.9N    5.9E mb=4.1  EMSC   NORTHERN ALGERIA             

P:  5AUG2020 126119    37.0N    3.0E 3.0-4.5 AABAA  Western Mediterranean      

 

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

 

SOUTHWEST PACIFIC

 

O:  7AUG2020 04:39:36  22.6S  173.3E mb=5.0  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

P:  3AUG2020 126211    22.0S  171.0E 4.0-5.5 BABAA  Loyalty Islands            

 

O:  6AUG2020 12:46:34  26.6S  177.4W mb=4.7  EMSC   SOUTH OF FIJI ISLANDS        

P:  4AUG2020 126212    29.0S  178.0W 4.0-5.4 ACAAA  No. Kermadec Islands       

 

 

OCEAN RIDGES

 

O:  6AUG2020 23:36:45  41.7S   42.5E Mw=6.3  EMSC   PRINCE EDWARD ISLANDS REGION 

P: 30JUL2020 125971    41.0S   43.0E 4.0-5.4 CAAAA  So. Indian Ocean           

 

O:  6AUG2020 13:57:37  22.8S  112.4W mb=5.5  EMSC   EASTER ISLAND REGION         

P:  5AUG2020 126214    25.0S  112.0W 4.0-5.4 ACAAA  So. East Pacific Rise      

 

O:  6AUG2020 12:33:10  34.4S  108.9W mb=4.7  EMSC   SOUTHERN EAST PACIFIC RISE   

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  7AUG2020 05:17:31  34.3S  179.4E ML=4.1  EMSC   SOUTH OF KERMADEC ISLANDS    

P:  8AUG2020 126225    37.0S  177.0E 3.0-4.7 ACBAA  North Island, N.Z.         

 

O:  7AUG2020 01:57:52  41.6S  172.8E ML=3.8  EMSC   SOUTH ISLAND OF NEW ZEALAND  

P:  7AUG2020 126233    42.0S  173.0E 3.0-5.1 AAAAA  So. Island, N.Z.           

 

JAPAN AND KURIL ISLANDS

 

O:  6AUG2020 15:34:43  33.7N  136.8E Mw=5.2  EMSC   NEAR S. COAST OF WESTERN HONSH

P: 10AUG2020 126082    34.0N  135.0E 3.5-4.9 BABAA  Central/So. Honshu Japan   

 

NEIC reported this earthquake of M 5.2 off southwestern Honshu, Japan  was felt with intensity II-III in the area(s) of Honshu, Japan at Tokyo.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  6AUG2020 16:43:14  28.0N  112.5W ML=3.8  EMSC   GULF OF CALIFORNIA           

P: 30JUL2020 125774    25.0N  113.0W 3.5-4.9 CCAAA  Gulf of California         

 

O:  6AUG2020 17:57:01  35.8N  117.6W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P:  6AUG2020 126107    35.7N  117.6W 2.5-4.4 AAAAA  So. California             

 

O:  6AUG2020 16:00:27  37.1N  122.4W ML=2.7  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  7AUG2020 126078    37.3N  121.6W 2.5-4.5 AAAAA  Central California         

 

O: 06AUG2020 17:49:34  38.2N  118.0W ml=2.0  EMSC   NEVADA

O: 06AUG2020 16:15:08  38.1N  118.1W ml=2.1  EMSC   NEVADA

O: 06AUG2020 13:01:57  38.2N  118.0W ML=3.4  EMSC   NEVADA

O: 06AUG2020 11:56:46  38.2N  118.0W ml=2.1  EMSC   NEVADA

O: 06AUG2020 07:29:04  38.2N  117.8W ml=2.0  EMSC   NEVADA

O:  7AUG2020 00:58:40  38.2N  117.8W ml=2.4  EMSC   NEVADA                       

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 AAAAA  California/Nevada area     

 

NEIC reported this earthquake of M 3.8 in western Nevada  was felt with intensity II-III in the area(s) of western Nevada.

 

O:  6AUG2020 16:13:38  40.5N  119.6W ml=2.1  EMSC   NEVADA                        

P:  4AUG2020 126075    38.8N  119.6W 2.5-4.4 ABAAA  California/Nevada area     

 

 

ALASKA

 

O:  6AUG2020 08:20:12  56.3N  149.8W ml=3.3  EMSC   GULF OF ALASKA               

 

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  6AUG2020 11:23:59  46.8N  120.0W Md=2.0  EMSC   WASHINGTON                   

P:  7AUG2020 126147    45.2N  120.1W 2.0-4.1 ABAAA  Oregon state, U.S.         

 

ROCKY MOUNTAINS REGION

 

O:  6AUG2020 14:02:38  31.1N  103.3W mb=2.7  EMSC   WESTERN TEXAS                

O:  6AUG2020 18:23:18  31.7N  104.3W mb=2.5  EMSC   WESTERN TEXAS                

P: 26JUL2020 125821    32.5N  104.6W 2.0-3.9 CAAAA  SW U.S.A                   

 

O:  6AUG2020 21:22:55  40.6N  109.5W Ml=3.0  EMSC   UTAH                         

P:  4AUG2020 126118    39.5N  111.9W 2.0-3.9 ABCAA  Utah area                  

 

EASTERN U.S./CANADA

 

O:  7AUG2020 13:50:52  47.5N   70.1W MB=1.8  ECAN Charlevoix Seismic Zone        

O:  6AUG2020 10:54:08  47.5N   70.3W MB=0.8  ECAN Charlevoix Seismic Zone        

P:  5AUG2020 126131    47.0N   69.0W 2.0-4.1 AAAAA  Maine                      

 

O:  6AUG2020 07:34:22  62.8N   65.3W MB=1.8  ECAN Resolution Island, NU          

 

HAWAII

 

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

 

STRONG EARTHQUAKE IN VANUATU TIDALLY PROMOTED

 

EARTHQUAKE SUMMARY FOR AUGUST 5, 2020

 

A strong M 6.5 earthquake shook central Vanuatu today. It occurred less than

an hour from local solar midnight, a time when tidal stresses are maximized

and was probably enhanced by stresses associated with the full moon of

August 3. The last earthquake within about 200 km of today's epicenter in

Vanuatu of M>=6.5 was an M 6.6 on July 31, 2019 and prior to that an M 6.8 on May 9, 2017.  Forecasts 125941 and 126207 had expected this activity was likely within about 100 km in late July or early August. Vanuatu is located near the geomagnetic equator and may have been promoted by the geomagnetic storm yesterday, the strongest in at least three months. This epicenter is also at 144-145 degrees from the M 7.5 in Oaxaca, Mexico of June 23, a distance at which energy is concentrated on the earth's surface following major earthquake and was probably enhanced by energy from that source.

 

O:  5AUG2020 12:05:36  16.1S  168.1E Mw=6.5  EMSC   VANUATU                      

P:  6AUG2020 126207    18.0S  168.0E 4.0-5.5 ABAAA  Vanuatu Islands            

P: 30JUL2020 125941    17.0S  168.0E 4.0-5.6 BAAAA  Vanuatu Islands            

 

An antipodal pair was completed today when an M 5.5 occurred in the Sunda area of Indonesia. The antipode in northern Venezuela saw an M 5.0 on August 2.  NEIC reported the earthquake of M 5.0 in northern Venezuela  was felt with intensity II-III in the area(s) of northern Venezuela at Mucurapo Diego, Port of Spain, Tunapuna, Trinidad and Tobago and at Saint Georges and Saint Davids, Grenada.  Forecast 126049 had expected this event in Venezuela was likely around August 7. Earthquakes of larger magnitude in northern Venezuela in the past year occurred on April 7, 2020 (M 5.2) and September 9, 2019 (M 5.5).

 

O:  2AUG2020 00:03:47  10.8N   62.6W Mw=5.0  EMSC   OFFSHORE SUCRE, VENEZUELA    

P:  7AUG2020 126049    10.0N   63.0W 3.4-5.1 BAAAA  Windward Islands           

 

The M 5.5 in Sunda, Indonesia was reported by BMG to have been felt with intensity III in Kota Bima, Tambolaka, Wainngapu and Waitabula, Sumba, Indonesia. It is the strongest within about 250 km of that epicenter since an M 6.4 on January 22, 2019 and an M 6.0 on January 21, 2019. The last such earthquake within about 200 km of today's epicenter was an M 6.2 on December 29, 2016. It is likely that the earthquake in Indonesia and the Venezuelan quake were promoted by strong tidal stresses as they occur very near the longitudes of maximum tidal stress with the full moon of August 3 as earlier reported in this summary:

 

"The full moon  arrived at 15:59 UT on August 3, 2020. Longitudes which were sub-solar (local solar noon) at this time are 60 West and 120 East and include in the west the Caribbean and Puerto Rico and portions of northern and western South America. Those in the east include the Philippines and central Indonesia near Sulawesi. These areas may see moderate seismic enhancement at this time. Many areas can see tidal enhancement with lunar-solar alignments so the seismicity of the earth is expected to be at active conditions through August 7." (August 2-5, 2020)

 

Forecasts 125937 and 126001 had expected this activity in late July or early August within about 150 km of this epicenter. This is near geomagnetic equator and the fourth node (90 degrees) from the M 7.8 in the Alaska Peninsula of July 22 and may have been promoted by energy from those sources.

 

O: 05AUG2020 09:18:17   9.8S  119.1E ML=4.3  EMSC   SUMBA REGION, INDONESIA

O: 05AUG2020 12:04:51   9.9S  119.2E ML=4.1  EMSC   SUMBA REGION, INDONESIA

O:  5AUG2020 08:27:11   9.7S  119.1E mb=5.5  EMSC   SUMBA REGION, INDONESIA      

P: 11AUG2020 126001     7.0S  120.0E 4.0-5.6 ACAAA  Flores Island area         

P: 27JUL2020 125937    11.0S  119.0E 4.0-5.5 CBAAA  So. of Indonesia           

 

An unusually large earthquake of M 5.4 shook areas of eastern Honshu, Japan today northeast of Tokyo. This epicenter is at 103-104 degrees from the M 7.5 in Oaxaca, Mexico of June 23, 2020 and may have been enhanced by concentrated energy from that source. The last earthquake with M>=5.4 within about 200 km of this epicenter occurred on June 24, 2020 as an M 5.9 south of this epicenter. The last earthquake in this area of M>=6.0 was an M 6.3 a year ago on August 4, 2019 about 200 km north of today's event. Quakes within about 150 km of this epicenter in the past year of M>=5.4 occurred on May 10 (M 5.8) and January 2, 2020 (M 5.6). Forecast 126097 had expected today's event within about 100 km of this epicenter was likely around August 6.

 

NEIC reported this earthquake of M 5.4  off eastern Honshu, Japan  was felt with intensity II-III in the area(s) of eastern Honshu, Japan in Chiba and Ibaraki.

 

O:  5AUG2020 17:53:59  36.1N  141.7E Mw=5.4  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  6AUG2020 126097    37.0N  142.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

The strongest earthquake in the U.S. or Canada today was an M 5.2 aftershock in the Alaska Peninsula zone. It was reported by NEIC to have been felt with intensity III in King Cove, Alaska. This aftershock zone has been active with such events over the past week to 10 days. but this and a similar event of M 5.2 yesterday is the strongest aftershock in the area since an M 5.6 on July 29. Forecast 126177 had expected today's event was likely within about 10 km of this epicenter around August 7. It was preceded by an M 3.7 foreshock about 1.5 minutes earlier.

 

O: 05AUG2020 16:16:13  54.1N  160.3W mb=3.7  EMSC   ALASKA PENINSULA

O: 05AUG2020 20:36:57  54.5N  160.5W mb=4.0  EMSC   ALASKA PENINSULA

O:  5AUG2020 16:17:41  54.6N  161.2W Mw=5.2  EMSC   ALASKA PENINSULA             

P:  7AUG2020 126177    54.7N  161.2W 3.5-5.1 AAAAA  Unimak Islands, Aleutians  

 

An unusual M 5.3 struck near the North Pole north of Svalbard today. It was not reported felt in this remote area. This is the farthest north of any event of M>=5.3 in at least 30 years. Activity had been expected at high latitudes such as this associated with the geomagnetic  disturbance as noted in previous issues of this report:

 

"The geomagnetic field saw disturbed conditions today. The AP level was 16.  High latitude geomagnetic field active conditions  with AP at 26. This is the most active the geomagnetic field has been in the past month. The last period of more disturbance was on April 20, 2020 when AP was 18. Moderate geomagnetic storms such as this can help promote seismicity at high latitudes and near the geomagnetic equator within several days of the storm.." (August 3-5, 2020)

 

Forecast 125923 had expected a moderate event to the south of this was likely in late July or early August.

 

O:  5AUG2020 08:48:05  87.4N    7.6E mb=5.3  EMSC   NORTH OF SVALBARD            

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 CDAAA  Arctic Ocean Region        

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:  6AUG2020 04:16:54  27.2N   92.1E ML=3.0  EMSC   ARUNACHAL PRADESH, INDIA     

P:  7AUG2020 126060    26.0N   93.0E 4.0-5.4 ABAAA  Myanmar                    

 

O:  5AUG2020 20:20:55  28.8N   76.7E ML=2.9  EMSC   ARYANA - DELHI REGION, INDIA 

P:  6AUG2020 126120    30.0N   80.0E 3.8-5.4 ABBAA  Xizang                     

 

O:  5AUG2020 18:55:04  30.8N   57.3E ML=4.2  EMSC   EASTERN IRAN                 

P:  7AUG2020 126110    31.0N   57.0E 3.8-5.2 AAAAA  So. Iran                   

 

O:  5AUG2020 11:19:00  31.5N   90.2E ML=4.2  EMSC   EASTERN XIZANG               

P: 31JUL2020 125842    33.0N   92.0E 3.8-5.4 BBBAA  Xizang                     

 

O:  5AUG2020 10:24:17  37.3N   73.9E mb=4.1  EMSC   TAJIKISTAN                   

P:  7AUG2020 126095    36.0N   75.0E 3.8-5.3 ABAAA  Northern India              

 

NEIC reported this earthquake of M 4.9 in Kyrgyzstan  was felt with intensity II-III in the area(s) of Tashkent, Uzbekistan.

 

O:  5AUG2020 08:18:50  40.2N   70.7E mb=4.9  EMSC   EASTERN UZBEKISTAN           

P: 11AUG2020 126085    39.0N   71.0E 3.8-5.4 CBAAA  Hindu Kush/Pakistan        

 

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

 

INDONESIA AND PHILIPPINES

 

O:  5AUG2020 21:59:45   0.6S   99.1E ML=3.8  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  8AUG2020 125993     0.0N   98.0E 4.0-5.4 BAAAA  So. Sumatera               

P:  8AUG2020 126014     2.0S   99.0E 4.0-5.4 BBAAA  So. of Sumatera            

 

O:  5AUG2020 09:46:22   0.9S  134.0E ML=4.6  EMSC   NEAR N COAST OF PAPUA, INDONES

P:  4AUG2020 126018     1.0S  133.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O:  5AUG2020 14:08:35   1.7N  127.2E ML=4.8  EMSC   HALMAHERA, INDONESIA         

P: 29JUL2020 125712     2.0N  128.0E 4.0-5.4 CAAAA  Halmahera                  

 

O:  5AUG2020 18:13:47   2.2N  126.2E ML=4.1  EMSC   MOLUCCA SEA                  

P:  7AUG2020 125988     2.0N  128.0E 4.0-5.6 AABAA  Halmahera                  

 

O:  5AUG2020 17:02:02   2.4S  140.1E mb=4.6  EMSC   NEAR N COAST OF PAPUA, INDONES

P:  5AUG2020 126011     3.0S  140.0E 4.0-5.4 AAAAA  Papua New Guinea           

 

O:  5AUG2020 23:25:26   4.6S  125.5E mb=4.5  EMSC   BANDA SEA                    

P:  5AUG2020 125999     4.0S  127.0E 4.0-5.4 AABAA  Ceram area                 

 

O:  5AUG2020 21:12:06   4.7S  143.7E mb=5.0  EMSC   NEW GUINEA, PAPUA NEW GUINEA 

P:  7AUG2020 126011     3.0S  142.0E 4.0-5.4 ABBAA  Papua New Guinea           

 

O:  5AUG2020 20:10:11   4.8N   96.2E ML=3.9  EMSC   NORTHERN SUMATRA, INDONESIA  

P: 29JUL2020 125714     4.0N   95.0E 4.0-5.6 CAAAA  Nicobar Islands            

 

O:  5AUG2020 18:02:57   7.3S  129.0E ML=4.4  EMSC   KEPULAUAN BABAR, INDONESIA   

P:  5AUG2020 125996     8.0S  128.0E 4.0-5.5 AAAAA  Banda Sea                  

 

O:  5AUG2020 21:42:17   8.5S  132.9E ML=4.1  EMSC   KEP. TANIMBAR REGION, INDONESI

P: 10AUG2020 126020     7.0S  130.0E 4.0-5.4 BBCAA  West Irian, PNG            

 

O:  5AUG2020 08:27:11   9.7S  119.1E mb=5.5  EMSC   SUMBA REGION, INDONESIA      

O: 05AUG2020 09:18:17   9.8S  119.1E ML=4.3  EMSC   SUMBA REGION, INDONESIA

O: 05AUG2020 12:04:51   9.9S  119.2E ML=4.1  EMSC   SUMBA REGION, INDONESIA

P: 11AUG2020 126001     7.0S  120.0E 4.0-5.6 ACAAA  Flores Island area         

P: 27JUL2020 125937    11.0S  119.0E 4.0-5.5 CBAAA  So. of Indonesia           

 

O:  6AUG2020 06:36:55  19.0N  145.1E mb=4.3  EMSC   PAGAN REG., N. MARIANA ISLANDS

P:  5AUG2020 126040    19.0N  146.0E 4.0-5.4 AAAAA  No. Marianas               

 

 

O: 05AUG2020 09:18:17   9.8S  119.1E ML=4.3  EMSC   SUMBA REGION, INDONESIA

O: 05AUG2020 12:04:51   9.9S  119.2E ML=4.1  EMSC   SUMBA REGION, INDONESIA

 

CENTRAL AND SOUTH AMERICA

 

O:  6AUG2020 03:25     29.5S   71.8W mb=4.4  GUC    Coquimbo at Coquimbo, III in L

P:  7AUG2020 126209    29.0S   70.0W 4.0-5.9 AABAA  Coast Central Chile        

 

GUC reported this earthquake was felt with intensity   IV in  Coquimbo at Coquimbo, III in La Higuera, Chile.

 

O:  5AUG2020 11:28:31  13.3N   92.5W ML=4.0  EMSC   OFF THE COAST OF GUATEMALA   

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 AAAAA  Chiapas, Mexico            

 

O: 05AUG2020 11:05:38  16.5N   94.8W ML=4.0  EMSC   OAXACA, MEXICO

O: 05AUG2020 08:41:10  16.6N   95.3W ML=4.0  EMSC   OAXACA, MEXICO

O: 05AUG2020 08:43:23  16.6N   94.1W ML=4.0  EMSC   OAXACA, MEXICO

O: 05AUG2020 15:13:16  17.5N   94.9W ML=4.0  EMSC   VERACRUZ, MEXICO

O:  5AUG2020 17:45:54  16.0N   96.3W ML=4.1  EMSC   OAXACA, MEXICO               

P:  5AUG2020 126044    16.0N   96.0W 3.5-5.6 AAAAA  Oaxaca, Mexico             

 

O:  5AUG2020 22:33:45  16.1N   97.3W ML=4.4  EMSC   OAXACA, MEXICO                

P:  6AUG2020 126042    16.0N   98.0W 3.5-5.7 AAAAA  Oaxaca, Mexico             

 

O: 05AUG2020 19:45:39  15.6N   95.1W ML=4.2  EMSC   OFFSHORE OAXACA, MEXICO

O: 05AUG2020 20:06:39  15.8N   94.8W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO

O: 05AUG2020 08:37:58  15.9N   95.1W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO

O: 05AUG2020 14:16:17  16.0N   95.9W ML=4.1  EMSC   OAXACA, MEXICO

O:  5AUG2020 09:31:21  16.5N   95.1W ML=4.1  EMSC   OAXACA, MEXICO               

P:  5AUG2020 126044    16.0N   96.0W 3.5-5.6 AAAAA  Oaxaca, Mexico             

 

O:  5AUG2020 14:02:22  17.8N   94.8W ML=4.1  EMSC   VERACRUZ, MEXICO             

P:  8AUG2020 126044    17.0N   96.0W 3.5-5.3 BAAAA  Oaxaca, Mexico             

 

O:  5AUG2020 08:36:31  18.0N   66.8W ML=3.0  EMSC   PUERTO RICO REGION           

O: 06AUG2020 04:24:47  18.0N   66.8W ML=3.5  EMSC   PUERTO RICO

P:  6AUG2020 126045    18.0N   67.0W 3.4-4.9 AAAAA  Puerto Rico                

 

O:  5AUG2020 07:50:54  19.0N   68.9W ML=3.0  EMSC   DOMINICAN REPUBLIC           

P:  6AUG2020 126051    20.0N   69.0W 3.0-4.5 AAAAA  Bahamas/No. Caribbean      

 

O: 05AUG2020 17:30:16  18.3N   71.8W ML=3.8  EMSC   HAITI REGION

O: 05AUG2020 21:50:05  18.5N   71.6W ML=3.6  EMSC   DOMINICAN REPUBLIC

O:  5AUG2020 07:37:43  20.2N   70.8W ML=3.0  EMSC   DOMINICAN REPUBLIC REGION    

P:  6AUG2020 126052    20.0N   71.0W 3.0-4.5 AAAAA  Bahamas/No. Caribbean      

 

O:  6AUG2020 03:24:03  29.3S   72.1W Mw=4.2  EMSC   OFFSHORE COQUIMBO, CHILE     

P:  7AUG2020 126209    29.0S   70.0W 4.0-5.9 AABAA  Coast Central Chile        

 

AFRICA AND EUROPE

 

O:  6AUG2020 00:02:27  34.6N    5.3W ML=3.9  EMSC   MOROCCO                      

P:  4AUG2020 126088    35.0N    4.0W 3.5-5.3 AAAAA  Morocco/Spain              

 

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

 

SOUTHWEST PACIFIC

 

O:  5AUG2020 09:45:02  12.9S  169.2E mb=4.6  EMSC   SANTA CRUZ ISLANDS REGION    

P:  7AUG2020 126206    13.0S  167.0E 4.0-5.8 AABAA  Vanuatu Islands            

 

O:  5AUG2020 12:05:36  16.1S  168.1E Mw=6.5  EMSC   VANUATU                      

P:  6AUG2020 126207    18.0S  168.0E 4.0-5.5 ABAAA  Vanuatu Islands            

P: 30JUL2020 125941    17.0S  168.0E 4.0-5.6 BAAAA  Vanuatu Islands            

 

O:  5AUG2020 08:35:48  17.9S  178.0W mb=4.6  EMSC   FIJI REGION                  

P:  4AUG2020 126205    18.0S  178.0W 4.0-5.7 AAAAA  Tonga Islands              

 

O:  5AUG2020 23:53:14  20.6S  178.5W mb=4.7  EMSC   FIJI REGION                  

P:  7AUG2020 126205    19.0S  178.0W 4.0-5.5 ABAAA  Tonga Islands              

 

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

 

OCEAN RIDGES

 

O:  5AUG2020 08:48:05  87.4N    7.6E mb=5.3  EMSC   NORTH OF SVALBARD            

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 CDAAA  Arctic Ocean Region        

 

 

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:  5AUG2020 17:53:59  36.1N  141.7E Mw=5.4  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  6AUG2020 126097    37.0N  142.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

O:  5AUG2020 15:12:21  36.7N  144.2E mb=4.6  EMSC   OFF EAST COAST OF HONSHU, JAPA

P:  3AUG2020 126111    38.0N  145.0E 4.0-5.6 ABAAA  So. of Honshu              

 

O:  6AUG2020 03:06:34  37.4N  138.8E Mw=5.1  EMSC   NEAR WEST COAST OF HONSHU, JAP

P:  9AUG2020 126092    37.0N  135.0E 3.5-4.9 BABAA  No. Honshu, Japan          

 

NEIC reported this earthquake of M 5.1 in western Honshu, Japan  was felt with intensity II-III in the area(s) of western Honshu, Japan in Niigata.

 

O:  5AUG2020 11:42:02  47.3N  146.9E mb=4.1  EMSC   NORTHWEST OF KURIL ISLANDS   

P:  9AUG2020 126152    48.0N  147.0E 3.5-5.5 BAAAA  So. Kurils                 

 

O:  5AUG2020 21:10:35  49.3N  154.4E mb=3.9  EMSC   KURIL ISLANDS                

P:  6AUG2020 126137    49.0N  156.0E 3.5-5.4 AAAAA  NE Pacific                 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  5AUG2020 22:30:56  34.0N  117.2W Ml=2.1  EMSC   GREATER LOS ANGELES AREA, CALI

P:  7AUG2020 126103    33.7N  117.5W 2.5-4.4 AAAAA  So. California             

 

O: 06AUG2020 03:13:52  36.1N  117.9W Ml=2.1  EMSC   CENTRAL CALIFORNIA

O:  5AUG2020 09:51:35  35.6N  117.4W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P:  6AUG2020 126107    35.7N  117.6W 2.5-4.4 AAAAA  So. California             

 

O: 06AUG2020 07:29:04  38.2N  117.8W ml=2.2  EMSC   NEVADA

O: 05AUG2020 21:10:01  38.2N  117.9W ml=2.2  EMSC   NEVADA

O: 06AUG2020 04:56:09  38.2N  118.0W ml=2.1  EMSC   NEVADA

O:  5AUG2020 16:44:54  38.2N  117.8W ML=2.6  EMSC   NEVADA                       

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 AAAAA  California/Nevada area     

 

O:  5AUG2020 10:29:59  38.3N  122.5W Md=2.3  EMSC   NORTHERN CALIFORNIA          

P:  5AUG2020 126078    38.0N  122.3W 2.5-4.4 AAAAA  Central California         

 

O: 06AUG2020 03:16:42  38.8N  122.8W MD=2.2  EMSC   NORTHERN CALIFORNIA

O:  5AUG2020 18:43:00  38.8N  122.7W Md=2.0  EMSC   NORTHERN CALIFORNIA          

P:  6AUG2020 126079    38.7N  122.7W 2.5-4.4 AAAAA  Central California         

 

O:  6AUG2020 02:46:13  40.6N  124.4W Md=2.8  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  6AUG2020 126143    40.2N  124.2W 2.5-4.6 AAAAA  Off Coast of No. Calif     

 

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

 

 

ALASKA

 

O: 05AUG2020 08:13:25  58.3N  137.1W MB=3.3  ECAN Juneau, AK    

O:  5AUG2020 08:13:25  58.4N  137.0W ML=3.2  EMSC   SOUTHEASTERN ALASKA          

P:  7AUG2020 126176    59.0N  139.0W 3.0-4.6 AAAAA  Southeast Alaska           

 

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

 

O: 05AUG2020 16:16:13  54.1N  160.3W mb=3.7  EMSC   ALASKA PENINSULA

O: 05AUG2020 20:36:57  54.5N  160.5W mb=4.0  EMSC   ALASKA PENINSULA

O:  5AUG2020 16:17:41  54.6N  161.2W Mw=5.2  EMSC   ALASKA PENINSULA              

P:  7AUG2020 126177    54.7N  161.2W 3.5-5.1 AAAAA  Unimak Islands, Aleutians  

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  5AUG2020 04:50:37  50.5N  130.5W MB=3.5  ECAN Port Hardy, BC                 

P:  8AUG2020 126163    50.6N  130.5W 3.0-5.0 BAAAA  British Colombia           

 

ROCKY MOUNTAINS REGION

 

O:  5AUG2020 17:14:47  31.1N  103.2W ML=3.0  EMSC   WESTERN TEXAS                

O:  5AUG2020 07:40:21  31.6N  104.3W mb=2.6  EMSC   WESTERN TEXAS                

P: 26JUL2020 125821    32.5N  104.6W 2.0-3.9 CAAAA  SW U.S.A                   

 

O:  5AUG2020 23:19:13  44.4N  115.2W ML=2.6  EMSC   SOUTHERN IDAHO               

P:  6AUG2020 126133    44.5N  115.1W 2.0-4.2 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O:  4AUG2020 21:51:56  74.3N   91.6W MB=2.2  ECAN Resolute, NU                   

 

O: 05AUG2020 10:13:10  36.3N   98.2W mb=3.1  EMSC   OKLAHOMA

O:  5AUG2020 11:18:33  36.4N   97.4W ML=2.4  EMSC   OKLAHOMA                     

P:  4AUG2020 126114    37.0N   98.0W 2.0-3.9 AAAAA  Southern Plains            

 

NEIC reported this earthquake of M 3.1 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma at Ames.

 

HAWAII

 

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

 

MODERATELY STRONG QUAKES SHAKE TURKEY; GUATEMALA

 

EARTHQUAKE SUMMARY FOR AUGUST 4, 2020

 

Moderately strong earthquakes of M 5.8 and M 5.5  occurred in the regions of

Guatemala and eastern Turkey today.  The earthquake of M 5.8 shook regions of Guatemala today. NEIC reported it was felt with intensity II-III in San Marcos, Guatemala and in Villahermosa, Tabasco, Mexico. An M 4.1 aftershock followed the mainshock half an hour later. The only quake in or near Guatemala of equal or larger magnitude in the past year was an M 5.9 about 100 km northeast of today's epicenter on December 19, 2019. The last of M>=6 in Guatemala was an M 6.8 on June 22, 2017. Forecasts 126030 and 126025 had expected this activity in Guatemala was like around August 6. Today's mainshock in Guatemala occurred within about an hour of local solar noon, a prime time for tidal triggering and may have been enhanced by tidal stresses associated with the full moon of August 3.

 

O:  4AUG2020 19:17:52  13.3N   92.0W Mw=5.8  EMSC   OFFSHORE GUATEMALA           

O:  4AUG2020 19:48:12  13.3N   92.5W ML=4.1  EMSC   OFF THE COAST OF GUATEMALA   

P:  6AUG2020 126030    13.0N   91.0W 3.5-5.3 AAAAA  Guatemala                  

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 AAAAA  Chiapas, Mexico             

 

A moderate earthquake of M 5.5 also occurred in eastern Turkey today. NEIC reported it was felt with intensity V in Turkey at Diyarbakir and IV in Malatya and Elazig. An aftershock of M 4.5 was also felt with intensity III in Arapkir, Malatya, Turkey. This appears to be the strongest aftershock to date of an M 6.8 on January 24, 2020. It was followed by moderate aftershocks of its own of M 4.8, 4.4 and 4.0. Today's M 5.5 occurred within minutes of local solar noon when tidal stresses are maximized and was probably enhanced by tidal stresses associated with the full moon of August 3. Forecasts 125835 and 126116 had expected today's activity was likely within about 50 km of this epicenter in late July or early August.

 

O: 04AUG2020 13:10:18  38.2N   38.8E mb=4.0  EMSC   EASTERN TURKEY

O: 04AUG2020 15:30:58  38.2N   38.8E ML=4.4  EMSC   EASTERN TURKEY

O: 04AUG2020 18:40:03  38.2N   38.8E Mw=4.8  EMSC   EASTERN TURKEY

O:  4AUG2020 09:37:36  38.2N   38.7E Mw=5.5  EMSC   EASTERN TURKEY               

P:  7AUG2020 126116    39.0N   40.0E 3.5-5.2 BAAAA  Turkey                     

P: 26JUL2020 125835    38.0N   39.0E 3.5-5.0 CAAAA  Turkey                     

 

The strongest earthquake in the U.S. or Canada today was an M 5.2 aftershock in the Alaska Peninsula zone. It was reported by NEIC to have been felt with intensity III in King Cove, Alaska. This aftershock zone has been active with such events over the past week to 10 days. but this is the strongest aftershock in the area since an M 5.6 on July 29. Forecast 126177 had expected today's event was likely within about 10 km of this epicenter around August 7.

 

O:  4AUG2020 12:47:18  54.7N  161.1W Mw=5.2  EMSC   ALASKA PENINSULA             

P:  7AUG2020 126177    54.7N  161.2W 3.5-5.1 BAAAA  Unimak Islands, Aleutians  

 

An unusual earthquake in the Arctic Ocean north of Siberia in the area north of Severnaya Zemlya, Russia occurred today with M 4.6. It was not reported felt in this remote area. This continues activation of the Arctic area which has included mostly light to moderate sized quakes in the past several days. This may be related  to the geomagnetic storm which occurred yesterday. This summary had previously noted in this regard:

 

"The geomagnetic field saw disturbed conditions today. The AP level was 16.  High latitude geomagnetic field active conditions  with AP at 26. This is the most active the geomagnetic field has been in the past month. The last period of more disturbance was on April 20, 2020 when AP was 18. Moderate geomagnetic storms such as this can help promote seismicity at high latitudes and near the geomagnetic equator within several days of the storm.." (August 3-5, 2020)

 

It may also be related to the full moon tidal stresses which maximized near this longitude on August 3 and occurred near local solar midnight, a prime time for high tidal stresses. Tidal stresses had been thought to be triggers for enhanced seismicity in previous issues at this time as:

 

"The full moon  arrived at 15:59 UT on August 3, 2020. Longitudes which were sub-solar (local solar noon) at this time are 60 West and 120 East and include in the west the Caribbean and Puerto Rico and portions of northern and western South America. Those in the east include the Philippines and central Indonesia near Sulawesi. These areas may see moderate seismic enhancement at this time. Many areas can see tidal enhancement with lunar-solar alignments so the seismicity of the earth is expected to be at active conditions through August 7." (August 2-5, 2020)

 

The last earthquake of similar size in the area within about 300 km of this epicenter was an M 4.7 on January 12, 2020. The last of larger magnitude was an M 5.1 on September 13, 2012. Forecast 126195 had expected this event within about 200 km was likely in early August.

 

O:  4AUG2020 14:52:14  83.5N  115.1E mb=4.6  EMSC   NORTH OF SEVERNAYA ZEMLYA    

P: 11AUG2020 126195    82.0N  119.0E 4.0-5.5 CBAAA  Arctic Ocean Region        

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:  4AUG2020 17:59:18  36.1N   69.2E mb=4.4  EMSC   HINDU KUSH REGION, AFGHANISTAN

P: 30JUL2020 125804    36.0N   69.0E 3.8-5.2 BAAAA  Hindu Kush/Pakistan        

 

O:  4AUG2020 14:26:33  54.1N  169.0E mb=4.3  EMSC   KOMANDORSKIYE OSTROVA REGION 

P: 10AUG2020 126169    55.0N  169.0E 4.0-5.9 CAAAA  Near Islands               

 

O:  4AUG2020 14:52:14  83.5N  115.1E mb=4.6  EMSC   NORTH OF SEVERNAYA ZEMLYA    

P: 11AUG2020 126195    82.0N  119.0E 4.0-5.5 CrBAA  Arctic Ocean Region        

 

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

 

INDONESIA AND PHILIPPINES

 

O:  4AUG2020 19:32:38   0.5N  126.4E mb=4.9  EMSC   MOLUCCA SEA                  

P:  7AUG2020 125988     2.0N  128.0E 4.0-5.6 BBBAA  Halmahera                  

 

O:  4AUG2020 07:14:04   0.9S  127.6E ML=4.4  EMSC   HALMAHERA, INDONESIA         

P:  7AUG2020 125999     1.0S  127.0E 4.0-5.4 BAAAA  Ceram area                  

 

O:  4AUG2020 23:51:08   1.9S  100.2E mb=5.1  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  8AUG2020 126014     2.0S   99.0E 4.0-5.4 BAAAA  So. of Sumatera            

 

O:  4AUG2020 07:45:17   4.5S  103.7E ML=4.1  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  3AUG2020 126015     4.0S  103.0E 4.0-5.4 AAAAA  So. of Sumatera            

 

O:  5AUG2020 02:35:12   3.3N  128.0E ML=4.4  EMSC   KEPULAUAN TALAUD, INDONESIA  

P:  7AUG2020 125988     2.0N  128.0E 4.0-5.6 ABAAA  Halmahera                  

 

O:  4AUG2020 14:34:52   5.0S  129.7E ML=4.2  EMSC   BANDA SEA                    

P:  4AUG2020 126020     6.0S  130.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O:  4AUG2020 17:50:57   5.7S  148.3E Mw=5.4  EMSC   NEW BRITAIN REGION, P.N.G.   

P:  7AUG2020 126006     6.0S  147.0E 4.0-5.8 BAAAA  New Ireland                

 

O:  4AUG2020 23:22:27   5.8S  131.0E mb=4.6  EMSC   BANDA SEA                    

O:  5AUG2020 05:17:13   6.5S  130.1E ML=4.4  EMSC   BANDA SEA                    

P:  4AUG2020 126020     6.0S  130.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O:  5AUG2020 01:30:11   8.9N  126.2E ML=4.5  EMSC   MINDANAO, PHILIPPINES        

P:  4AUG2020 125988     7.0N  127.0E 4.0-5.7 ABAAA  Halmahera                  

P:  8AUG2020 125991     8.0N  126.0E 4.0-5.6 BAAAA  Mindanao, Philippines      

 

O:  4AUG2020 23:14:28  10.3S  113.2E ML=4.0  EMSC   SOUTH OF JAVA, INDONESIA     

P:  3AUG2020 126012     9.0S  114.0E 4.0-5.5 ABAAA  So. of Bali                

 

O:  5AUG2020 00:28:37  11.1N  121.6E ML=4.6  EMSC   PANAY, PHILIPPINES           

P:  4AUG2020 126033    12.0N  122.0E 3.5-5.2 AAAAA  Luzon, Philippines         

 

O:  4AUG2020 17:10:58  11.4N  124.5E ML=4.1  EMSC   LEYTE, PHILIPPINES           

P: 10AUG2020 126034    13.0N  124.0E 3.5-4.9 CBAAA  Luzon, Philippines         

 

O:  4AUG2020 22:58:23  16.9N  120.9E ML=4.1  EMSC   LUZON, PHILIPPINES           

P: 27JUL2020 125753    18.0N  120.0E 3.5-4.9 CBAAA  Luzon, Philippines         

 

 

CENTRAL AND SOUTH AMERICA

 

O:  4AUG2020 19:17:52  13.3N   92.0W Mw=5.8  EMSC   OFFSHORE GUATEMALA           

O:  4AUG2020 19:48:12  13.3N   92.5W ML=4.1  EMSC   OFF THE COAST OF GUATEMALA   

P:  6AUG2020 126030    13.0N   91.0W 3.5-5.3 AAAAA  Guatemala                  

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 AAAAA  Chiapas, Mexico            

 

O:  4AUG2020 19:06:28  15.5N   96.2W ML=4.5  EMSC   OFFSHORE OAXACA, MEXICO      

O:  4AUG2020 12:10:54  15.8N   96.1W ML=4.1  EMSC   OAXACA, MEXICO               

O:  4AUG2020 10:25:14  16.0N   95.2W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

O:  5AUG2020 03:08:00  16.6N   95.3W ML=4.1  EMSC   OAXACA, MEXICO               

P:  5AUG2020 126044    16.0N   96.0W 3.5-5.6 AAAAA  Oaxaca, Mexico             

 

O:  4AUG2020 13:57:47  16.6S   71.5W mb=4.3  EMSC   SOUTHERN PERU                

P:  6AUG2020 126202    17.0S   71.0W 4.0-6.1 AAAAA  So. Peru/Bolivia           

 

O:  4AUG2020 11:06:01  17.6N   94.7W ML=4.1  EMSC   VERACRUZ, MEXICO             

P:  8AUG2020 126044    17.0N   96.0W 3.5-5.3 BAAAA  Oaxaca, Mexico             

 

O:  4AUG2020 15:21:46  18.8N   69.3W ML=3.2  EMSC   DOMINICAN REPUBLIC           

P:  6AUG2020 126051    20.0N   69.0W 3.0-4.5 ABAAA  Bahamas/No. Caribbean      

 

O:  4AUG2020 21:51:41  19.6N   70.1W ML=3.1  EMSC   DOMINICAN REPUBLIC           

P:  6AUG2020 126052    20.0N   71.0W 3.0-4.5 AAAAA  Bahamas/No. Caribbean      

 

O:  4AUG2020 23:04:45  29.1N  106.5W ML=4.1  EMSC   CHIHUAHUA, MEXICO            

 

 

AFRICA AND EUROPE

 

O:  5AUG2020 04:45:17  12.8S   45.5E ML=3.3  EMSC   MAYOTTE REGION               

P: 26JUL2020 125931    12.0S   44.0E 3.0-4.8 CAAAA  Mayotte    area            

 

O:  4AUG2020 11:44:04   5.5S   22.6E mb=4.8  EMSC   DEMOCRATIC REPUBLIC OF THE CON

 

O: 04AUG2020 13:10:18  38.2N   38.8E mb=4.0  EMSC   EASTERN TURKEY

O: 04AUG2020 15:30:58  38.2N   38.8E ML=4.4  EMSC   EASTERN TURKEY

O: 04AUG2020 18:40:03  38.2N   38.8E Mw=4.8  EMSC   EASTERN TURKEY

O:  4AUG2020 09:37:36  38.2N   38.7E Mw=5.5  EMSC   EASTERN TURKEY               

P:  7AUG2020 126116    39.0N   40.0E 3.5-5.2 BAAAA  Turkey                     

P: 26JUL2020 125835    38.0N   39.0E 3.5-5.0 CAAAA  Turkey                     

 

O:  4AUG2020 15:16:35  66.3N   18.4W ML=3.0  EMSC   ICELAND REGION               

P: 27JUL2020 125914    66.0N   17.0W 3.0-4.5 CAAAA  Iceland area               

 

O: 04AUG2020 15:50:23  25.8S   29.4E ML=2.3  EMSC   SOUTH AFRICA

O: 04AUG2020 11:22:05  26.0S   29.3E ML=2.4  EMSC   SOUTH AFRICA

O: 04AUG2020 11:22:05  26.0S   29.3E ML=2.4  EMSC   SOUTH AFRICA

O: 04AUG2020 11:00:20  26.3S   30.1E ML=2.3  EMSC   SOUTH AFRICA

O: 04AUG2020 17:42:03  26.4S   27.6E ML=2.1  EMSC   SOUTH AFRICA

O: 04AUG2020 14:00:04  26.5S   30.0E ML=2.1  EMSC   SOUTH AFRICA

O: 05AUG2020 03:37:38  26.9S   26.7E ML=2.3  EMSC   SOUTH AFRICA

 

SOUTHWEST PACIFIC

 

O:  4AUG2020 16:31:19  12.6S  166.6E Mw=5.6  EMSC   SANTA CRUZ ISLANDS           

P:  7AUG2020 126206    13.0S  167.0E 4.0-5.8 BAAAA  Vanuatu Islands            

 

O:  5AUG2020 01:53:52  15.4S  167.6E mb=4.9  EMSC   VANUATU                      

P: 28JUL2020 125941    14.0S  168.0E 4.0-5.4 CBAAA  Vanuatu Islands            

 

O:  5AUG2020 01:01:23  24.1S  175.4W mb=4.9  EMSC   SOUTH OF TONGA               

P: 29JUL2020 125956    23.0S  175.0W 4.0-5.4 CBAAA  Tonga Islands              

 

O:  4AUG2020 11:48:29  26.1S  179.9W mb=4.4  EMSC   SOUTH OF FIJI ISLANDS        

P: 10AUG2020 126219    25.0S  180.0W 4.0-5.4 CAAAA  Tonga Islands              

 

OCEAN RIDGES

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  5AUG2020 02:20:58  28.3S  176.4W mb=4.9  EMSC   KERMADEC ISLANDS REGION      

P:  8AUG2020 126212    29.0S  176.0W 4.0-5.6 BAAAA  No. Kermadec Islands       

 

O:  4AUG2020 19:31:04  31.4S  178.4E ML=4.7  EMSC   KERMADEC ISLANDS REGION      

P:  8AUG2020 126229    31.0S  180.0E 4.0-5.5 BAAAA  So. Kermadec Islands       

 

O:  4AUG2020 20:04:03  35.8S  179.4E ML=3.6  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  8AUG2020 126225    37.0S  177.0E 3.0-4.7 BBBAA  North Island, N.Z.          

 

O:  4AUG2020 10:50:27  37.4S  176.5E ML=4.2  EMSC   NORTH ISLAND OF NEW ZEALAND  

P:  6AUG2020 126225    38.0S  178.0E 3.0-4.5 AAAAA  North Island, N.Z.         

 

O:  5AUG2020 04:40:19  37.4S  179.9E ML=3.7  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  6AUG2020 126225    38.0S  178.0E 3.0-4.5 AABAA  North Island, N.Z.         

 

O:  4AUG2020 20:42:24  40.4S  173.4E ML=3.8  EMSC   COOK STRAIT, NEW ZEALAND     

P:  6AUG2020 126233    41.0S  174.0E 3.0-5.3 AAAAA  So. Island, N.Z.           

 

 

JAPAN AND KURIL ISLANDS

 

O:  4AUG2020 11:21:36  34.5N  140.4E mb=4.9  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  8AUG2020 126097    35.0N  140.0E 4.0-5.4 BAAAA  Off East Coast Honshu      

P: 30JUL2020 125816    34.0N  141.0E 4.0-5.5 BAAAA  Off East Coast Honshu       

 

NEIC reported this earthquake of M  4.9 in SE Honshu, Japan  was felt with intensity II-III in the area(s) of SE Honshu, Japan in Tokyo, Kawasaki and Tateyama, Chiba, Kanagawa.

 

O:  4AUG2020 14:03:30  37.1N  141.1E ML=3.8  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  6AUG2020 126097    37.0N  142.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  5AUG2020 05:00:55  34.2N  117.7W Ml=2.6  EMSC   GREATER LOS ANGELES AREA, CALI

P:  4AUG2020 126105    34.2N  117.8W 2.5-4.4 AAAAA  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 Upland, Rancho Cucamonga, Mt. Baldy, Claremont, La Verne, and Pomona.

 

O: 04AUG2020 07:10:24  31.9N  115.7W ML=3.6  EMSC   BAJA CALIFORNIA, MEXICO

O:  5AUG2020 00:42:17  31.6N  116.2W Ml=2.2  EMSC   BAJA CALIFORNIA, MEXICO      

P:  4AUG2020 126102    31.9N  116.3W 2.5-4.6 AAAAA  So. California              

P:  6AUG2020 126102    32.4N  115.8W 2.5-4.4 AAAAA  So. California             

 

O:  4AUG2020 11:54:39  35.6N  118.2W Ml=2.5  EMSC   CENTRAL CALIFORNIA           

P:  6AUG2020 126107    35.7N  117.6W 2.5-4.4 AAAAA  So. California             

 

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 Onyx and Weldon.

 

O:  4AUG2020 21:28:37  36.4N  120.3W ML=2.9  EMSC   CENTRAL CALIFORNIA           

P:  5AUG2020 126076    36.2N  120.8W 2.5-4.6 AAAAA  Central California         

 

NEIC reported this earthquake of M 3.0 in Central California  was felt with intensity II-III in the area(s) of Central California at Fresno, Los Banos, Modesto, San Jose and Palo Alto.

 

O:  4AUG2020 19:10:37  37.5N  118.8W Md=2.1  EMSC   CENTRAL CALIFORNIA           

P:  7AUG2020 126072    37.3N  118.7W 2.5-4.6 BAAAA  California/Nevada area     

 

O: 04AUG2020 19:38:25  38.2N  117.8W ml=2.1  EMSC   NEVADA

O: 04AUG2020 19:01:11  38.1N  118.0W ml=2.1  EMSC   NEVADA

O: 04AUG2020 16:49:17  38.1N  118.0W ML=2.4  EMSC   NEVADA

O: 04AUG2020 16:22:19  38.2N  117.9W ML=2.3  EMSC   NEVADA

O: 04AUG2020 15:52:21  38.1N  117.9W ml=2.0  EMSC   NEVADA

O: 04AUG2020 10:14:57  38.2N  117.8W ml=2.2  EMSC   NEVADA

O: 04AUG2020 10:10:31  38.0N  118.8W ML=2.4  EMSC   CENTRAL CALIFORNIA

O:  4AUG2020 20:00:50  38.2N  118.0W ml=2.1  EMSC   NEVADA                       

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 AAAAA  California/Nevada area     

 

O:  4AUG2020 09:35:22  40.4N  124.5W Md=2.4  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  6AUG2020 126143    40.2N  124.2W 2.5-4.6 AAAAA  Off Coast of No. Calif     

 

 

ALASKA

 

O:  4AUG2020 12:47:18  54.7N  161.1W Mw=5.2  EMSC   ALASKA PENINSULA             

P:  7AUG2020 126177    54.7N  161.2W 3.5-5.1 BAAAA  Unimak Islands, Aleutians  

 

O: 04AUG2020 09:13:25  62.4N  149.5W mb=4.1  EMSC   CENTRAL ALASKA

O: 05AUG2020 01:39:44  63.6N  150.0W ML=3.0  EMSC   CENTRAL ALASKA

O:  4AUG2020 08:52:11  64.2N  151.6W ML=4.5  EMSC   CENTRAL ALASKA               

P:  5AUG2020 126184    63.3N  151.0W 3.2-4.9 AAAAA  Central Alaska             

 

NEIC reported this earthquake of M  4.3-4.5 in  Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Tanana, Healy, Fairbanks, Wasilla.

NEIC reported this earthquake of M  3.8-4.1 in  Central Alaska was felt with intensity II-III in the area(s) of Central Alaska at Ruby (IV), Talkeetna, Wasilla, Chugiak, Anchorage.

 

O:  4AUG2020 14:01:43  69.5N  144.4W ML=3.4  EMSC   NORTHERN ALASKA              

P: 28JUL2020 125918    69.0N  144.0W 3.0-4.7 CAAAA  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:  4AUG2020 17:25:06  31.6N  104.3W ML=2.9  EMSC   WESTERN TEXAS                

P: 26JUL2020 125821    32.5N  104.6W 2.0-3.9 CAAAA  SW U.S.A                   

 

O:  4AUG2020 23:32:48  44.4N  115.2W ML=3.2  EMSC   SOUTHERN IDAHO               

P:  6AUG2020 126133    44.5N  115.1W 2.0-4.2 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 Boise and Caldwell.

 

EASTERN U.S./CANADA

 

O:  5AUG2020 04:47:18  36.6N   89.6W mb=2.4  EMSC   SOUTHEASTERN MISSOURI        

P:  7AUG2020 126090    36.0N   89.0W 2.0-4.2 AAAAA  New Madrid area            

 

NEIC reported this earthquake of M  2.5 in Missouri  was felt with intensity II-III in the area(s) of Missouri at Lilbourn, Portageville, Perryville and in Cairo, Illinois and Wynne, Arkansas.

 

HAWAII

 

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

 

 

GEOMAGNETIC DISTURBANCE ENHANCES SEISMICITY NEAR GEOMAGNETIC EQUATOR

 

EARTHQUAKE SUMMARY FOR AUGUST 3, 2020

 

A new geomagnetic storm began today near mid-day. It was accompanied by a series of B-class solar flares, the first since early June, 2020. It was followed by moderately large earthquake of M 5.5-5.6 near the geomagnetic equator in the Mariana Islands and in Northern Chile/Southern Peru. This summary had expected this activity as:

 

"The geomagnetic field saw disturbed conditions today. The AP level was 16.  High latitude geomagnetic field active conditions  with AP at 26. This is the most active the geomagnetic field has been in the past month. The last period of more disturbance was on April 20, 2020 when AP was 18. Moderate geomagnetic storms such as this can help promote seismicity at high latitudes and near the geomagnetic equator within several days of the storm." (August 3-4, 2020)

 

The strongest earthquake in the world today was an M 5.5 in northern Chile. NEIC reported it was felt in Northern Chile with IV in Iquique, Tarapaca and in Arica and Calama, Antofagasta and in wouthern Peru with II-III in Arequipa and Tacna. This area has been active with moderate earthquakes since the M 7.8 in the Alaska Peninsula of July 22. It is located at 102-104 degrees from that epicenter and is likely being promoted by concentrated energy from that source.

GUC reported this earthquake was felt with intensity V in  Tarapaca at Camina, La Tirana; IV in Alto Hospicio, Huara, Iquique, Mamina, Pica; III in Pisagua and Pozo Almonte; in Arica with IV in Codpa and Cuya and III in Arica, San Miguel de Azapa and Cocon Chile, Chile. An aftershock about 100 km to the south occurred later with M 4.5-4.7. GUC reported the earthquake of M 4.5 was felt with intensity IV in  Tarapaca at Pica; III in Alto Hospicio and Iquique and II in Camina and in Arica at Arica with intensity III, Chile. NEIC reported this earthquake of M 4.7 in northern Chile  was felt with intensity II-III in the area(s) of northern Chile at Iquique, Tarapaca. The only similar event within about 100 km of this epicenter in the past two years was an M 6.3 6.2 on November 1, 2018 near today's epicenter. Forecasts 126217 and 126203 had expected today's activity within this area was likely around August 4-5.

Other recent activity in southern Peru and northern Chile commented on in this summary may have been precursory to today's event.

 

O:  3AUG2020 11:56:51  19.6S   69.3W Mw=5.5  EMSC   TARAPACA, CHILE              

O:  3AUG2020 11:56     19.6S   69.2W mb=5.5  GUC    Tarapaca at Camina, La Tirana;

P:  4AUG2020 126217    20.0S   69.0W 4.0-5.9 AAAAA  So. Peru/Bolivia           

P:  5AUG2020 126203    19.0S   69.0W 4.0-5.7 AAAAA  So. Peru/Bolivia           

 

O:  3AUG2020 18:26     20.5S   69.0W mb=4.5  GUC    Tarapaca at Pica; III in Alto

P:  3AUG2020 126210    21.0S   69.0W 4.0-5.9 AAAAA  Coast No. Chile            

 

An M 5.5-5.6 also shook regions of the Northern Mariana Islands today. NEIC reported intensity II in Tinian to the south of the epicenter. This is the strongest earthquake in the northern Marianas within about 200 km of this epicenter since an M 5.9 on October 26, 2018. Forecast 125761 had expected today's activity was likely within about 50 km these epicenters in late July.

 

O:  3AUG2020 12:45:52  17.0N  147.5E mb=4.9  EMSC   MARIANA ISLANDS REGION       

O:  3AUG2020 08:31:10  17.1N  147.4E Mw=5.6  EMSC   MARIANA ISLANDS REGION       

P: 28JUL2020 125761    17.0N  147.0E 4.0-5.5 BAAAA  No. Marianas               

 

A light M 3.5 earthquake was felt widely in the Los Angeles, California area today. NEIC reported intensity IV in Anaheim, Placenta, Fullerton, Villa Park, Yorba Linda, Brea and III in Orange, among other communities. This is the largest earthquake in eastern Los Angeles since an M 3.6 on April 3, 2019. Earthquakes of M 3.8 and 4.2 hit the San Fernando Valley area west of Los Angeles on July 30, 2020. Forecast 126105 had expected today's activity within about 30 km of this epicenter was likely around August 4.

 

O:  3AUG2020 22:18:50  33.9N  117.8W ML=3.4  EMSC   GREATER LOS ANGELES AREA, CALI

O:  3AUG2020 22:20:05  33.9N  117.8W Ml=2.0  EMSC   GREATER LOS ANGELES AREA, CALI

P:  4AUG2020 126105    34.2N  117.8W 2.5-4.4 AAAAA  So. California             

 

 

 

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

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

 

ASIA

 

O:  3AUG2020 11:49:50  21.4N   72.8E ML=3.0  EMSC   GUJARAT, INDIA                

P: 10AUG2020 126057    23.0N   71.0E 3.5-4.9 CBBAA  India                      

 

O:  3AUG2020 11:37:10  27.7N   52.6E mb=4.6  EMSC   SOUTHERN IRAN                

P:  7AUG2020 126064    28.0N   52.0E 3.5-5.2 BAAAA  So. Iran/Persian Gulf      

 

O:  3AUG2020 12:35:01  27.7N   56.3E mb=4.4  EMSC   SOUTHERN IRAN                

P:  4AUG2020 126064    28.0N   56.0E 3.5-5.1 AAAAA  So. Iran/Persian Gulf      

 

O:  4AUG2020 02:59:47  33.2N   86.9E mb=4.6  EMSC   WESTERN XIZANG               

P:  4AUG2020 126120    31.0N   84.0E 3.8-5.4 ACBAA  Xizang                     

 

O:  3AUG2020 22:30:44  44.1N   84.6E mb=4.7  EMSC   NORTHERN XINJIANG, CHINA     

P: 10AUG2020 126130    42.0N   83.0E 4.0-5.4 CCAAA  Kirgizstan/Xinjiang        

 

O:  3AUG2020 11:24:11  36.4N   70.8E mb=4.2  EMSC   HINDU KUSH REGION, AFGHANISTAN

P: 30JUL2020 125804    36.0N   69.0E 3.8-5.2 BAAAA  Hindu Kush/Pakistan        

 

NEIC reported this earthquake of M 4.2 in Hindu Kush, Afghanistan  was felt with intensity II-III in the area(s) of Hndu Kush, Afghanistan at Mahmoud Raqui.

 

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

 

INDONESIA AND PHILIPPINES

 

O:  3AUG2020 23:43:27   0.9S  134.4E ML=4.5  EMSC   NEAR N COAST OF PAPUA, INDONES

P:  4AUG2020 126018     1.0S  133.0E 4.0-5.4 AABAA  West Irian, PNG            

 

O:  4AUG2020 02:39:55   3.2N  122.8E ML=4.6  EMSC   CELEBES SEA                  

P:  4AUG2020 125990     4.0N  125.0E 4.0-5.6 AACAA  Mindanao, Philippines      

 

O:  4AUG2020 00:09:24   4.1S  129.2E ML=4.7  EMSC   BANDA SEA                    

P:  5AUG2020 125999     4.0S  127.0E 4.0-5.4 AABAA  Ceram area                 

 

O:  3AUG2020 08:30:44   6.5S  131.6E ML=4.5  EMSC   KEP. TANIMBAR REGION, INDONESI

P:  4AUG2020 126020     6.0S  130.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O:  3AUG2020 10:11:12   7.0S  125.6E ML=4.2  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P:  9AUG2020 125996     6.0S  125.0E 4.0-5.6 CAAAA  Banda Sea                  

 

O:  3AUG2020 13:10:46   9.5S  114.0E ML=4.0  EMSC   SOUTH OF BALI, INDONESIA     

P:  3AUG2020 126012     9.0S  114.0E 4.0-5.5 AAAAA  So. of Bali                

 

O:  3AUG2020 12:29:18   9.7S  114.0E ML=4.0  EMSC   SOUTH OF JAVA, INDONESIA     

P:  3AUG2020 126012     9.0S  114.0E 4.0-5.5 AAAAA  So. of Bali                

 

O:  3AUG2020 22:41:41  11.8N  126.0E ML=3.9  EMSC   PHILIPPINE ISLANDS REGION    

P: 27JUL2020 125752    11.0N  125.0E 3.5-4.9 CAAAA  Luzon, Philippines         

 

O:  3AUG2020 22:22:28  12.5N  142.5E mb=4.5  EMSC   MARIANA ISLANDS REGION       

P:  5AUG2020 126047    13.0N  144.0E 4.0-5.4 AABAA  So. Marianas/Guam          

 

O:  3AUG2020 12:45:52  17.0N  147.5E mb=4.9  EMSC   MARIANA ISLANDS REGION       

O:  3AUG2020 08:31:10  17.1N  147.4E Mw=5.6  EMSC   MARIANA ISLANDS REGION       

P: 28JUL2020 125761    17.0N  147.0E 4.0-5.5 BAAAA  No. Marianas               

 

CENTRAL AND SOUTH AMERICA

 

O:  3AUG2020 11:11:34  12.4N   88.1W mb=4.3  EMSC   NEAR COAST OF NICARAGUA      

P: 30JUL2020 125759    12.0N   87.0W 3.5-5.4 BAAAA  Nicaragua                  

 

O:  3AUG2020 13:15:30  13.5N   92.7W ML=4.0  EMSC   OFF THE COAST OF GUATEMALA   

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 BAAAA  Chiapas, Mexico            

 

O:  4AUG2020 04:05:16  15.5N   93.9W ML=4.0  EMSC   OFFSHORE CHIAPAS, MEXICO     

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 ABAAA  Chiapas, Mexico            

 

O:  3AUG2020 12:53:26  15.5N   96.3W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO      

P:  5AUG2020 126044    16.0N   96.0W 3.5-5.6 AAAAA  Oaxaca, Mexico              

 

O:  3AUG2020 11:56:51  19.6S   69.3W Mw=5.5  EMSC   TARAPACA, CHILE              

P:  4AUG2020 126217    20.0S   69.0W 4.0-5.9 AAAAA  So. Peru/Bolivia           

P:  5AUG2020 126203    19.0S   69.0W 4.0-5.7 AAAAA  So. Peru/Bolivia           

 

O:  4AUG2020 03:24:58  23.6S   67.1W mb=4.3  EMSC   JUJUY, ARGENTINA             

P:  6AUG2020 126210    23.0S   69.0W 4.0-5.8 AABAA  Coast No. Chile            

 

AFRICA AND EUROPE

 

O:  4AUG2020 04:12:16  26.8S   26.5E ML=2.1  EMSC   SOUTH AFRICA                  

P: 30JUL2020 125949    27.0S   27.0E 3.0-4.5 BAAAA  Rep. South Africa          

 

O:  3AUG2020 11:33:41  79.5N    4.5E Mn=2.8  EMSC   GREENLAND SEA                

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 BAAAA  Arctic Ocean Region        

 

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:  4AUG2020 04:35:09  22.6S  112.2W mb=4.7  EMSC   EASTER ISLAND REGION         

P:  5AUG2020 126214    25.0S  112.0W 4.0-5.4 ACAAA  So. East Pacific Rise      

 

O:  3AUG2020 11:33:41  79.5N    4.5E Mn=2.8  EMSC   GREENLAND SEA                

P: 29JUL2020 125923    79.0N    7.0E 4.0-5.6 BAAAA  Arctic Ocean Region        

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  3AUG2020 07:36:19  34.4S  179.2E ML=3.9  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 29JUL2020 125964    37.0S  178.0E 3.0-4.4 BCAAA  North Island, N.Z.         

 

O:  4AUG2020 05:12:39  37.0S  177.3E ML=3.8  EMSC   OFF E. COAST OF N. ISLAND, N.Z

P:  6AUG2020 126225    38.0S  178.0E 3.0-4.5 AAAAA  North Island, N.Z.         

 

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

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

 

JAPAN AND KURIL ISLANDS

 

No earthquakes of M>=4 were located in Japan or the Kuril Islands today.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  3AUG2020 22:18:50  33.9N  117.8W ML=3.4  EMSC   GREATER LOS ANGELES AREA, CALI

O:  3AUG2020 22:20:05  33.9N  117.8W Ml=2.0  EMSC   GREATER LOS ANGELES AREA, CALI

P:  4AUG2020 126105    34.2N  117.8W 2.5-4.4 AAAAA  So. California             

 

O: 03AUG2020 10:12:30  32.4N  115.2W Ml=2.3  EMSC   BAJA CALIFORNIA, MEXICO

O: 03AUG2020 09:59:45  33.3N  116.3W Ml=2.0  EMSC   SOUTHERN CALIFORNIA

O:  3AUG2020 14:28:14  33.0N  115.6W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P:  6AUG2020 126102    32.4N  115.8W 2.5-4.4 BAAAA  So. California             

 

O:  4AUG2020 00:20:27  33.2N  116.7W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P:  4AUG2020 126103    33.4N  116.7W 2.5-4.6 AAAAA  So. California             

 

O:  3AUG2020 08:25:22  33.9N  117.0W Ml=2.7  EMSC   SOUTHERN CALIFORNIA          

P:  4AUG2020 126103    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 San Bernardino (IV) and Beaumont, San Jacinto, Hemet, Sun City, Idyllwild, Loma Linda, Lake Elsinore and Fallbrook.

 

O: 04AUG2020 00:17:29  36.4N  118.0W ML=2.5  EMSC   CENTRAL CALIFORNIA

O:  3AUG2020 09:34:59  36.4N  118.0W Ml=2.3  EMSC   CENTRAL CALIFORNIA            

P: 28JUL2020 125827    35.8N  117.6W 2.5-4.4 BAAAA  So. California             

 

O: 04AUG2020 04:47:22  36.9N  121.6W Md=2.1  EMSC   NORTHERN CALIFORNIA

O: 04AUG2020 00:28:01  36.7N  121.4W Md=2.1  EMSC   CENTRAL CALIFORNIA

O:  3AUG2020 23:27:52  36.4N  121.0W Md=2.1  EMSC   CENTRAL CALIFORNIA           

O:  4AUG2020 06:36:20  36.5N  121.1W Md=2.1  EMSC   CENTRAL CALIFORNIA           

P:  5AUG2020 126077    36.8N  121.3W 2.5-4.6 AAAAA  Central California         

 

O:  4AUG2020 04:57:13  38.3N  118.3W ml=2.4  EMSC   NEVADA                       

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 AAAAA  California/Nevada area     

 

O:  3AUG2020 09:05:57  40.3N  124.5W Md=2.6  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  6AUG2020 126143    40.2N  124.2W 2.5-4.6 BAAAA  Off Coast of No. Calif     

 

O:  3AUG2020 23:50:01  40.5N  116.0W ML=3.0  EMSC   NEVADA                       

P: 30JUL2020 125845    40.0N  117.9W 2.5-4.6 BABAA  California/Nevada area     

 

ALASKA

 

O:  4AUG2020 02:45:48  52.3N  170.2W ML=3.6  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P:  5AUG2020 126162    52.2N  171.5W 3.5-5.1 AAAAA  Andreanoff Isls, Aleutians 

 

O:  4AUG2020 05:18:41  54.9N  160.3W mb=3.5  EMSC   ALASKA PENINSULA             

P:  5AUG2020 126166    55.1N  159.3W 3.5-4.9 AAAAA  Alaska Peninsula           

 

O:  4AUG2020 03:44:01  56.1N  149.2W ML=3.4  EMSC   GULF OF ALASKA               

O:  4AUG2020 03:41:02  56.1N  149.2W ml=3.1  EMSC   GULF OF ALASKA               

P: 24JUL2020 125919    55.0N  149.0W 3.0-4.7 CBAAA  Gulf of  Alaska            

 

O:  3AUG2020 22:50:33  67.5N  146.9W ML=3.3  EMSC   NORTHERN ALASKA              

P: 28JUL2020 125918    69.0N  144.0W 3.0-4.7 BBAAA  Northern Alaska            

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  3AUG2020 07:49:44  49.3N  125.9W Ml=2.5  EMSC   VANCOUVER ISLAND, CANADA REGIO

 

O:  3AUG2020 20:47:51  48.7N  129.3W MB=3.2  ECAN Port Alice, BC                 

P: 10AUG2020 126154    48.7N  129.0W 2.8-5.0 CAAAA  Vancouver Island area      

 

ROCKY MOUNTAINS REGION

 

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

 

EASTERN U.S./CANADA

 

O:  3AUG2020 06:13:25  45.0N   80.0W MB=1.0  ECAN Midland, ON                    

P:  5AUG2020 126146    42.0N   80.0W 2.0-4.1 ACAAA  Ohio/Lake Erie             

 

O: 04AUG2020 05:44:25  36.4N   97.4W mb=2.4  EMSC   OKLAHOMA

O: 03AUG2020 23:13:45  36.4N   97.4W mb=3.4  EMSC   OKLAHOMA

O:  3AUG2020 08:12:36  36.4N   97.3W ML=2.2  EMSC   OKLAHOMA                     

P:  4AUG2020 126114    37.0N   98.0W 2.0-3.9 AAAAA  Southern Plains            

 

HAWAII

 

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

SOUTHWEST PACIFIC REMAINS ACTIVE

 

EARTHQUAKE SUMMARY FOR AUGUST 2, 2020

 

The strongest earthquake in the world today was an M 5.8 in the Bismarck Sea. This is part of the regional activity which began yesterday in the area. This summary had noted with the M 6.0 yesterday in this regard:

 

"Earthquake of M 5.7 and 6.0 (in that order) also occurred in eastern Indonesia today in the region of the Bismarck Sea. They were not reported felt in this remote area. The  6.0 is the strongest in the Bismarck Sea since an M 6.4 on July 25, 2016. Forecast 126005 had expected today's activity was likely within about 50 km of this epicenter around August 6. Like the M 5.6 in the D'entrecasteaux Islands yesterday this epicenter is at the fifth node (72 degrees ) from the Alaska Peninsula and was probably promoted by energy from that source. Other such events today occurred at or near 72 degrees from Alaska in Mindanao, Philippines (M 6.4)," (August 1-2, 2020)

 

O:  2AUG2020 09:29:57   3.1S  149.0E Mw=5.8  EMSC   BISMARCK SEA                  

P:  6AUG2020 126005     3.0S  149.0E 4.0-5.4 BAAAA  New Ireland                

 

An M 5.4 was felt widely in eastern New Guinea today. NEIC reported felt intensity IV in the Eastern Highlands at Goroka and in Kindiawa and II-III in Madang, Kainantu, Mount Hage, Lalibu and Port Moresby, Papua New Guinea. This is the strongest earthquake in this area within about 200 km of this epicenter

since events of M 5.7 to the north on January 30, 2020 and M 5.9 on March 4, 2019. Forecast 126006 had expected today's activity was likely around August 5 within about 100 km.

 

O:  2AUG2020 14:15:48   5.0S  145.4E Mw=5.3  EMSC   EASTERN NEW GUINEA REG., P.N.G

O:  3AUG2020 02:35:19   5.0S  145.4E mb=4.4  EMSC   EASTERN NEW GUINEA REG., P.N.G

P:  5AUG2020 126006     4.0S  146.0E 4.0-5.6 AAAAA  New Ireland                

 

The strongest earthquake in the world today was an M 4.9 in the Alaska Peninsula area. This area has seen daily aftershocks of this size each day for the past week. Forecast 125905 had expected this event within about 25 km of this epicenter was likely around July 31.

 

O: 02AUG2020 07:44:52  54.7N  161.1W ML=3.0  EMSC   ALASKA PENINSULA

O: 02AUG2020 18:58:33  54.9N  160.3W ml=3.4  EMSC   ALASKA PENINSULA

O: 02AUG2020 12:16:09  55.1N  158.3W ML=3.4  EMSC   ALASKA PENINSULA

O: 03AUG2020 03:36:58  55.2N  159.5W mb=3.8  EMSC   ALASKA PENINSULA

O:  2AUG2020 14:39:23  54.6N  161.1W mb=4.9  EMSC   ALASKA PENINSULA             

P: 31JUL2020 125905    54.3N  161.4W 3.5-4.9 AAAAA  Unimak Islands, Aleutians  

 

A moderate earthquake also occurred today in the area south of Africa with M 4.7. This epicenter is in the antipodal area of the M 7.8 in the Alaska Peninsula of July 22 and was probably promoted by focused energy at the antipode of that event. The last earthquake in this area south of Africa with M>=4.7 was an M 5.1 on February 9, 2020 and prior to that an M 5.4 on January 10, 2020 and an M 5.6 on August 22, 2018. This forecast had expected this area would be active following the Alaska Peninsula quake at this time as:

 

"Far field triggering is likely with the earthquake in Alaska. The antipode is located south of South Africa in the Indian Ocean east of Bouvet Island and is a possible site for triggered activity." (July 22, 2020)

 

O:  3AUG2020 00:36:04  52.9S   27.7E mb=4.7  EMSC   SOUTH OF AFRICA              

 

Earthquakes at 103 degrees from the Alaska Peninsula epicenter today included the continuing swarm in southern Peru and northern Chile, Indonesia and an M 4.1 in the South Island of New Zealand. The New Zealand event had been expected in forecast 126234 within about 100 km of the epicenter was likely around August 3. This summary had expected in its far-field forecast that both of these areas would see enhanced seismicity at this time as:

 

"Far field triggering is likely with the earthquake in Alaska ... those near 103 degrees include northern Chile and southern Peru; South Island, New Zealand; Sumatra and southwestern Indonesia." (July 22, 2020)

 

O:  2AUG2020 21:40:15  45.1S  167.5E ML=4.1  EMSC   SOUTH ISLAND OF NEW ZEALAND  

P:  3AUG2020 126234    44.0S  169.0E 3.0-4.9 ABAAA  So. Island, N.Z.           

 

O:  2AUG2020 11:01:01  19.8S   69.9W mb=3.9  EMSC   TARAPACA, CHILE              

P:  4AUG2020 126217    20.0S   69.0W 4.0-5.9 AAAAA  So. Peru/Bolivia           

 

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

 

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

 

INDONESIA AND PHILIPPINES

 

O:  3AUG2020 01:43:00   0.2N  126.1E mb=4.6  EMSC   MOLUCCA SEA                  

P: 29JUL2020 125712     2.0N  128.0E 4.0-5.4 ABBAA  Halmahera                  

 

O:  3AUG2020 00:52:58   0.4N  119.6E ML=4.2  EMSC   MINAHASA, SULAWESI, INDONESIA

P:  5AUG2020 125989     2.0N  118.0E 3.5-5.1 ABBAA  Malaysia                   

 

O:  2AUG2020 16:44:26   0.4S  124.4E mb=4.9  EMSC   MOLUCCA SEA                  

P:  4AUG2020 126017     1.0S  124.0E 4.0-5.4 AAAAA  Sulawesi area              

 

O:  2AUG2020 09:29:57   3.1S  149.0E Mw=5.8  EMSC   BISMARCK SEA                 

P:  6AUG2020 126005     3.0S  149.0E 4.0-5.4 BAAAA  New Ireland                

 

O:  2AUG2020 21:29:47   4.9S  102.0E ML=4.1  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  3AUG2020 126015     4.0S  103.0E 4.0-5.4 AAAAA  So. of Sumatera            

 

O:  2AUG2020 14:15:48   5.0S  145.4E Mw=5.3  EMSC   EASTERN NEW GUINEA REG., P.N.G

O:  3AUG2020 02:35:19   5.0S  145.4E mb=4.4  EMSC   EASTERN NEW GUINEA REG., P.N.G

P:  5AUG2020 126006     4.0S  146.0E 4.0-5.6 AAAAA  New Ireland                

 

O:  3AUG2020 03:24:16   5.5N  126.9E ML=4.3  EMSC   MINDANAO, PHILIPPINES        

P:  5AUG2020 125991     6.0N  125.0E 4.0-5.6 AABAA  Mindanao, Philippines      

 

O:  2AUG2020 12:49:09   5.7S  127.5E mb=4.2  EMSC   BANDA SEA                    

P:  5AUG2020 125999     4.0S  127.0E 4.0-5.4 BBAAA  Ceram area                 

 

O:  2AUG2020 19:55:49   6.6S  129.2E ML=4.4  EMSC   BANDA SEA                    

P:  4AUG2020 126020     6.0S  130.0E 4.0-5.4 AAAAA  West Irian, PNG            

 

O:  2AUG2020 21:33:43   7.9S  130.3E mb=4.4  EMSC   KEP. TANIMBAR REGION, INDONESI

P: 29JUL2020 125718     7.0S  129.0E 4.0-5.4 BAAAA  Banda Sea                  

 

O:  2AUG2020 16:44:31   8.2N  127.0E ML=4.0  EMSC   MINDANAO, PHILIPPINES        

O:  2AUG2020 11:30:30   8.5N  126.6E ML=4.3  EMSC   MINDANAO, PHILIPPINES        

P:  4AUG2020 125988     7.0N  127.0E 4.0-5.7 ABAAA  Halmahera                   

P:  8AUG2020 125991     8.0N  126.0E 4.0-5.6 CAAAA  Mindanao, Philippines      

 

 

CENTRAL AND SOUTH AMERICA

 

O:  3AUG2020 04:28:00   6.8N   73.2W ML=4.2  EMSC   NORTHERN COLOMBIA            

P: 29JUL2020 125708     7.0N   73.0W 4.0-5.4 BAAAA  Colombia                   

 

O:  2AUG2020 07:12:42  14.5N   93.2W ML=4.2  EMSC   OFFSHORE CHIAPAS, MEXICO     

P:  6AUG2020 126025    14.0N   93.0W 3.5-5.3 BAAAA  Chiapas, Mexico            

P: 30JUL2020 125745    14.0N   94.0W 3.5-5.3 AAAAA  Chiapas, Mexico            

 

O:  2AUG2020 07:26:14  15.8N   94.0W ML=4.0  EMSC   OFFSHORE CHIAPAS, MEXICO     

P:  5AUG2020 126044    16.0N   96.0W 3.5-5.6 BABAA  Oaxaca, Mexico             

 

O:  2AUG2020 10:54:39  17.8N   66.9W ML=3.2  EMSC   PUERTO RICO REGION           

O:  3AUG2020 02:52:24  17.9N   67.0W ML=3.1  EMSC   PUERTO RICO REGION           

P:  4AUG2020 126045    18.0N   67.0W 3.4-4.9 AAAAA  Puerto Rico                

 

O:  3AUG2020 06:46:55  18.1N  102.8W mb=4.6  EMSC   MICHOACAN, MEXICO             

P: 31JUL2020 125757    19.0N  102.0W 3.5-5.1 BAAAA  Michoacan, Mexico          

 

NEIC reported this earthquake of M 4.6 in Jalisco, Mexico  was felt with intensity II-III in the area(s) of Jalisco, Mexico at Tepatitlan.

 

O:  2AUG2020 16:37:13  19.6N   71.9W ML=3.1  EMSC   DOMINICAN REPUBLIC REGION    

P:  6AUG2020 126052    20.0N   71.0W 3.0-4.5 BAAAA  Bahamas/No. Caribbean      

 

O:  2AUG2020 11:01:01  19.8S   69.9W mb=3.9  EMSC   TARAPACA, CHILE              

P:  4AUG2020 126217    20.0S   69.0W 4.0-5.9 AAAAA  So. Peru/Bolivia           

 

O:  3AUG2020 06:49:50  20.4N   70.7W ML=3.2  EMSC   DOMINICAN REPUBLIC REGION    

P:  6AUG2020 126052    20.0N   71.0W 3.0-4.5 BAAAA  Bahamas/No. Caribbean      

 

O:  2AUG2020 08:46:49  30.5S   72.0W Mw=4.1  EMSC   OFFSHORE COQUIMBO, CHILE     

P:  4AUG2020 126221    31.0S   70.0W 4.0-5.5 AABAA  Central Chile              

 

O:  2AUG2020 18:52:05  33.9S   72.1W ML=4.0  EMSC   OFFSHORE VALPARAISO, CHILE   

P: 29JUL2020 125960    35.0S   73.0W 4.0-5.8 BBAAA  Central Chile              

 

 

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

 

AFRICA AND EUROPE

 

P: 30JUL2020 125949    27.0S   27.0E 3.0-4.5 AAAAA  Rep. South Africa          

 

O: 02AUG2020 09:33:09  28.5N   17.9W ML=2.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 02AUG2020 12:16:45  28.5N   17.8W ML=2.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 02AUG2020 19:20:49  28.5N   17.8W ML=2.0  EMSC   CANARY ISLANDS, SPAIN REGION

O:  2AUG2020 13:18:03  28.2N   16.2W ML=2.1  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 29JUL2020 125773    28.0N   16.0W 3.0-4.5 BAAAA  Canary Islands             

 

SOUTHWEST PACIFIC

 

O:  2AUG2020 09:57:28   5.7S  151.9E mb=4.8  EMSC   NEW BRITAIN REGION, P.N.G.   

P:  4AUG2020 126004     5.0S  153.0E 4.0-5.5 AAAAA  New Britain                

 

O:  3AUG2020 01:18:17  17.3S  174.2W Mw=5.2  EMSC   TONGA                        

P:  7AUG2020 126205    16.0S  175.0W 4.0-5.7 BBAAA  Tonga Islands              

 

O:  3AUG2020 00:58:26  19.6S  178.0W mb=4.5  EMSC   FIJI REGION                  

P: 30JUL2020 125939    19.0S  178.0W 4.0-5.4 BAAAA  Tonga Islands              

 

OCEAN RIDGES

 

 

O: 02AUG2020 09:33:09  28.5N   17.9W ML=2.3  EMSC   CANARY ISLANDS, SPAIN REGION

O: 02AUG2020 12:16:45  28.5N   17.8W ML=2.0  EMSC   CANARY ISLANDS, SPAIN REGION

O: 02AUG2020 19:20:49  28.5N   17.8W ML=2.0  EMSC   CANARY ISLANDS, SPAIN REGION

O:  2AUG2020 13:18:03  28.2N   16.2W ML=2.1  EMSC   CANARY ISLANDS, SPAIN REGION 

P: 29JUL2020 125773    28.0N   16.0W 3.0-4.5 BAAAA  Canary Islands             

 

O:  2AUG2020 10:35:21   0.1S   18.0W mb=4.7  EMSC   NORTH OF ASCENSION ISLAND    

P: 31JUL2020 125720     1.0S   16.0W 4.0-5.4 AABAA  Central Mid-Atlantic       

 

O:  2AUG2020 12:47:24  28.9S   60.9E mb=4.8  EMSC   SOUTHWEST INDIAN RIDGE       

P:  3AUG2020 126215    28.0S   66.0E 4.0-5.8 AACAA  So. Indian Ocean           

 

O:  3AUG2020 00:36:04  52.9S   27.7E mb=4.7  EMSC   SOUTH OF AFRICA              

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O:  3AUG2020 02:56:01  34.8S  179.3W mb=5.0  EMSC   SOUTH OF KERMADEC ISLANDS    

P:  5AUG2020 126229    34.0S  179.0W 4.0-5.8 AAAAA  So. Kermadec Islands       

 

O:  2AUG2020 21:40:15  45.1S  167.5E ML=4.1  EMSC   SOUTH ISLAND OF NEW ZEALAND  

P:  3AUG2020 126234    44.0S  169.0E 3.0-4.9 ABAAA  So. Island, N.Z.           

 

JAPAN AND KURIL ISLANDS

 

O:  3AUG2020 04:53:57  26.3N  126.3E mb=4.6  EMSC   RYUKYU ISLANDS, JAPAN        

P:  4AUG2020 126063    26.0N  128.0E 4.0-5.5 AABAA  Ryukyu Islands             

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O:  2AUG2020 12:40:24  37.4N  121.8W ML=2.7  EMSC   SAN FRANCISCO BAY AREA, CALIF.

O:  2AUG2020 12:40:24  37.4N  121.8W ML=3.0  ANSS   SAN FRANCISCO BAY AREA, CALIF.

P:  7AUG2020 126078    37.3N  121.6W 2.5-4.5 BAAAA  Central California         

 

NEIC reported this earthquake of M 3.0 in Northern California  was felt with intensity II-III in the area(s) of Northern California at Mount Hamilton (VI) and San Jose, Milpitas.

 

 

O: 02AUG2020 12:36:40  33.5N  115.9W Ml=2.2  EMSC   SOUTHERN CALIFORNIA

O: 02AUG2020 17:20:57  33.0N  115.6W Ml=2.0  EMSC   SOUTHERN CALIFORNIA

O:  2AUG2020 09:09:17  33.0N  115.6W Ml=2.4  EMSC   SOUTHERN CALIFORNIA           

P:  6AUG2020 126102    32.4N  115.8W 2.5-4.4 BAAAA  So. California             

 

O:  2AUG2020 10:50:50  36.8N  121.3W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P:  5AUG2020 126077    36.8N  121.3W 2.5-4.6 BAAAA  Central California         

 

O: 02AUG2020 15:36:20  38.2N  117.9W ml=2.2  EMSC   NEVADA

O: 02AUG2020 15:23:14  38.2N  117.8W ml=2.1  EMSC   NEVADA

O: 02AUG2020 19:31:49  38.2N  117.9W ml=2.0  EMSC   NEVADA

O: 02AUG2020 18:18:27  38.2N  118.0W ML=2.6  EMSC   NEVADA

O:  2AUG2020 11:00:12  38.2N  117.9W ML=2.3  EMSC   NEVADA                       

P:  6AUG2020 126072    38.2N  118.0W 2.5-4.6 BAAAA  California/Nevada area     

 

O:  3AUG2020 03:27:43  39.6N  120.6W ml=2.0  EMSC   NORTHERN CALIFORNIA          

O:  2AUG2020 16:42:25  40.1N  119.6W ML=2.8  EMSC   NEVADA                       

P: 31JUL2020 125794    39.3N  120.0W 2.5-4.4 AAAAA  California/Nevada area     

 

O:  3AUG2020 06:37:56  40.4N  124.6W Md=2.5  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P: 29JUL2020 125868    40.3N  124.7W 2.5-4.4 BAAAA  Off Coast of No. Calif     

 

O:  2AUG2020 20:21:35  40.4N  127.3W ML=3.3  EMSC   OFF COAST OF NORTHERN CALIFORN

P: 29JUL2020 125869    40.4N  127.2W 2.5-4.5 BAAAA  Off Coast of No. Calif     

 

ALASKA

 

O:  2AUG2020 13:58:56  51.0N  178.5W mb=3.8  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 29JUL2020 125890    51.7N  179.7W 3.5-5.1 BAAAA  Andreanoff Isls, Aleutians 

 

O:  2AUG2020 09:27:15  63.4N  155.3W ML=3.8  EMSC   CENTRAL ALASKA               

O: 02AUG2020 08:46:47  63.4N  155.3W ML=3.6  EMSC   CENTRAL ALASKA

P: 26JUL2020 125917    65.0N  156.0W 3.0-4.7 CBAAA  Northern Alaska            

 

O: 02AUG2020 07:44:52  54.7N  161.1W ML=3.0  EMSC   ALASKA PENINSULA

O: 02AUG2020 18:58:33  54.9N  160.3W ml=3.4  EMSC   ALASKA PENINSULA

O: 02AUG2020 12:16:09  55.1N  158.3W ML=3.4  EMSC   ALASKA PENINSULA

O: 03AUG2020 03:36:58  55.2N  159.5W mb=3.8  EMSC   ALASKA PENINSULA

O:  2AUG2020 14:39:23  54.6N  161.1W mb=4.9  EMSC   ALASKA PENINSULA             

P: 31JUL2020 125905    54.3N  161.4W 3.5-4.9 AAAAA  Unimak Islands, Aleutians  

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O:  2AUG2020 20:54:07  43.5N  128.3W ML=3.3  EMSC   OFF COAST OF OREGON          

P: 31JUL2020 125871    44.3N  129.4W 3.0-4.4 AAAAA  Off Coast of Oregon        

 

O:  3AUG2020 03:21:44  47.4N  121.8W Ml=2.0  EMSC   WASHINGTON                   

P:  4AUG2020 126156    48.0N  123.0W 2.0-4.4 AAAAA  Washington state, U.S.     

 

ROCKY MOUNTAINS REGION

 

O:  2AUG2020 15:11:24  31.9N  102.3W mb=2.4  EMSC   WESTERN TEXAS                

P: 25JUL2020 125821    32.5N  102.6W 2.0-3.9 CAAAA  SW U.S.A                   

 

EASTERN U.S./CANADA

 

O:  3AUG2020 02:03:41  35.9N   83.7W Md=2.2  EMSC   EASTERN TENNESSEE            

P: 31JUL2020 125805    35.0N   84.0W 2.0-3.9 BAAAA  Kentucky/Tennessee/NC       

 

NEIC reported this earthquake of M 2.6 in Eastern Tennessee  was felt with intensity II-III in the area(s) of Eastern Tennessee at Knoxville, Walland, and in Sylva, North Carolina.

 

O:  2AUG2020 15:15:00  36.7N   97.7W ML=2.3  EMSC   OKLAHOMA                      

P:  4AUG2020 126114    37.0N   98.0W 2.0-3.9 AAAAA  Southern Plains            

 

HAWAII

 

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