]

 

 

UNUSUAL EARTHQUAKE IN FALKLAND ISLANDS

 

EARTHQUAKE SUMMARY FOR DECEMBER 7, 2018

 

 

It was a relatively quiet day in global seismicity. Many of the recent aftershock sequences did not produce notable events today. The most unusual earthquake of the day was an M 4.9 in the Falkland Islandsd region. The last earthquake within about 300 km of this epicenter with M>=4.9 in the Falkland Islands was an M 4.9 on August 11, 2002. The last within about 1000 km of larger size was an M 5.3 on February 27, 2014.

 

O:  8DEC2018 05:24:34  54.1S   58.7W mb=4.9  EMSC   FALKLAND ISLANDS REGION      

 

The strongest activity continued in the Loyalty Islands aftershock sequence with for moderate aftershock including an M 5.0 and 5.1. Forecast 121918 had expected this activity was likely around December 5. Neither of today's events was reported felt in the epicentral region.

 

O:  7DEC2018 20:43:55  21.9S  169.2E mb=4.9  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

O:  7DEC2018 11:14:48  21.9S  170.2E mb=5.0  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

O:  8DEC2018 02:57:23  22.0S  169.3E mb=5.1  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

O:  7DEC2018 09:22:13  22.4S  169.7E mb=4.8  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

P:  5DEC2018 121918    23.0S  169.0E 4.0-5.6 AAAAA  Loyalty Islands            

 

An earthquake of M 4.5-4.7 occurred in the Dominican Republic today. This continues NEIC reported this earthquake of M  4.7 in the Dominican Republic was felt with intensity II-III in the area(s) of the Dominican Republic at Otra Banda. Bayamon, Puerto Rico and Culebra, Puerto Rico. a series of minor earthquakes in the area over the past month which may precede a strong regional quake. The last such quake was an M 4.4 on November 11, 2018 and prior to that an M 4.0 on August 24, 2018 within about 100 km of today's epicenter. Forecast 121758 had expected this activity around December 11.

 

O:  8DEC2018 04:07:27  18.8N   69.0W Md=3.2  EMSC   DOMINICAN REPUBLIC           

O:  8DEC2018 00:59:35  19.1N   68.1W Md=3.1  EMSC   DOMINICAN REPUBLIC REGION    

O:  8DEC2018 01:14:51  19.1N   68.1W Md=3.1  EMSC   DOMINICAN REPUBLIC REGION    

O:  7DEC2018 18:25:47  19.5N   68.0W mb=4.5  EMSC   DOMINICAN REPUBLIC REGION    

O:  7DEC2018 18:25:47  19.5N   68.0W mb=4.7  ANSS   DOMINICAN REPUBLIC REGION    

P: 11DEC2018 121758    20.0N   68.0W 3.0-4.6 BAAAA  Bahamas/No. Caribbean      

 

Aftershocks in the Anchorage, Alaska continued today but at a further reduced rate. The strongest of these was an M 3.7 but only six events of M>=3 were recorded in the area today. Most were felt lightly in the Anchorage, Alaska region. Forecasts 121886 and 121884 had expected this activity around December 8-9.

 

O:  7DEC2018 19:54:53  61.3N  150.0W ML=3.7  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 21:35:10  61.4N  150.0W ML=3.4  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 12:53:16  61.4N  150.1W Ml=3.4  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 22:24:55  61.5N  150.0W ML=2.5  EMSC   SOUTHERN ALASKA              

aO:  7DEC2018 22:45:07  61.5N  150.0W ML=3.0  EMSC   SOUTHERN ALASKA              

O:  8DEC2018 06:11:50  61.5N  150.0W ML=3.4  EMSC   SOUTHERN ALASKA              

P:  6DEC2018 121886    61.1N  150.2W 3.2-5.0 AAAAA  Central Alaska             

P:  8DEC2018 121884    60.9N  151.1W 3.2-5.2 AAAAA  Central Alaska             

P:  9DEC2018 121886    61.3N  150.9W 3.2-5.3 AAAAA  Central Alaska             

 

The largest earthquake in the U.S. or Canada today, however did not occur in the Anchorage swarm but in the aftershock sequcen in Northern Alaska which began in  August 2018. This event of M 4.4. The last quake in this area of M>=4.4 occurred  September 18, 2018 with M 5.1. Forecast 121891 had expected today's event was likely around December 8.

 

O:  7DEC2018 15:22:56  69.8N  145.0W mb=4.4  EMSC   NORTHERN ALASKA              

P:  8DEC2018 121891    69.0N  144.0W 3.0-4.6 AAAAA  Northern Alaska            

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

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

 

ASIA

 

O:  7DEC2018 22:39:24  43.9N   86.6E mb=4.6  EMSC   NORTHERN XINJIANG, CHINA     

P: 26NOV2018 121537    42.0N   82.0E 3.8-5.2 DBCAA  China                      

 

O:  7DEC2018 16:43:15  54.7N  168.1E mb=4.6  EMSC   KOMANDORSKIYE OSTROVA REGION 

P:  8DEC2018 121869    53.0N  171.0E 4.0-6.0 ABBAA  Near Islands               

 

O:  8DEC2018 04:53:32  58.8N  158.9E mb=4.6  EMSC   KAMCHATKA PENINSULA, RUSSIA  

P:  9DEC2018 121866    55.0N  160.0E 4.0-5.8 ACAAA  E. of Kamchatka            

 

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

 

INDONESIA AND PHILIPPINES

 

O:  8DEC2018 04:02:11   4.2S  101.6E mb=4.8  EMSC   SOUTHERN SUMATRA, INDONESIA  

P:  3DEC2018 121724     4.0S  102.0E 4.0-5.6 BAAAA  So. of Sumatera            

 

O:  7DEC2018 19:27:26   6.3S  130.4E mb=4.4  EMSC   BANDA SEA                    

P:  7DEC2018 121731     7.0S  130.0E 4.0-5.6 AAAAA  West Irian, PNG            

 

O:  7DEC2018 08:40:03  19.5N  144.5E mb=4.7  EMSC   MAUG ISLANDS REG, N. MARIANA I

P:  6DEC2018 121750    19.0N  145.0E 4.0-5.4 AAAAA  No. Marianas               

 

CENTRAL AND SOUTH AMERICA

 

O:  7DEC2018 16:49:31  10.2S   75.4W mb=4.3  EMSC   CENTRAL PERU                 

P:  7DEC2018 121900    11.0S   74.0W 4.0-5.6 AAAAA  Central Peru               

 

O:  7DEC2018 23:50:58  14.1N   91.1W mb=4.2  EMSC   GUATEMALA                    

P:  6DEC2018 121739    15.0N   91.0W 3.5-5.3 AAAAA  Guatemala                  

 

NEIC reported this earthquake of M 4.2 in Guatemala was felt with intensity II-III in the area(s) ofSanta Catarina and Sacatepequez, Guatemala.

 

O:  7DEC2018 10:24:00  14.6S   70.7W ML=4.0  EMSC   SOUTHERN PERU                

P:  7DEC2018 121900    15.0S   71.0W 4.0-5.6 AAAAA  Central Peru                

 

O:  7DEC2018 18:28:08  16.0N   98.4W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

O:  7DEC2018 18:05:03  16.8N   99.9W ML=4.1  EMSC   OFFSHORE GUERRERO, MEXICO    

P:  8DEC2018 121752    16.0N   99.0W 3.5-5.4 AAAAA  Oaxaca, Mexico              

 

O:  7DEC2018 12:14:10  17.1N  101.9W mb=4.0  EMSC   OFFSHORE GUERRERO, MEXICO    

P: 10DEC2018 121746    17.0N  101.0W 3.5-5.2 BAAAA  Michoacan, Mexico          

 

O:  7DEC2018 18:15:15  18.7N   64.8W MD=3.1  EMSC   VIRGIN ISLANDS REGION        

P:  6DEC2018 121757    20.0N   65.0W 3.0-4.6 ABAAA  Bahamas/No. Caribbean      

 

O:  8DEC2018 04:07:27  18.8N   69.0W Md=3.2  EMSC   DOMINICAN REPUBLIC           

O:  8DEC2018 00:59:35  19.1N   68.1W Md=3.1  EMSC   DOMINICAN REPUBLIC REGION    

O:  8DEC2018 01:14:51  19.1N   68.1W Md=3.1  EMSC   DOMINICAN REPUBLIC REGION    

O:  7DEC2018 18:25:47  19.5N   68.0W mb=4.5  EMSC   DOMINICAN REPUBLIC REGION    

P: 11DEC2018 121758    20.0N   68.0W 3.0-4.6 BAAAA  Bahamas/No. Caribbean      

 

O:  7DEC2018 20:41:14  21.7N  104.8W ML=4.0  EMSC   NAYARIT, MEXICO              

P:  7DEC2018 121747    18.0N  104.0W 3.5-5.6 ACAAA  Michoacan, Mexico          

 

O:  8DEC2018 03:31:39  24.1S   66.8W mb=4.6  EMSC   SALTA, ARGENTINA             

O:  7DEC2018 17:40:24  24.1S   67.2W ML=4.2  EMSC   SALTA, ARGENTINA             

P:  8DEC2018 121915    24.0S   68.0W 4.0-5.9 AAAAA  Argentina                  

 

O:  7DEC2018 09:44:17  29.0S   70.4W mb=4.8  EMSC   ATACAMA, CHILE               

P:  8DEC2018 121931    30.0S   70.0W 4.0-5.6 AAAAA  Coast Central Chile        

 

AFRICA AND EUROPE

 

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

 

SOUTHWEST PACIFIC

 

O:  7DEC2018 20:43:55  21.9S  169.2E mb=4.9  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

O:  7DEC2018 11:14:48  21.9S  170.2E mb=5.0  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

O:  8DEC2018 02:57:23  22.0S  169.3E mb=5.1  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

O:  7DEC2018 09:22:13  22.4S  169.7E mb=4.8  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

P:  5DEC2018 121918    23.0S  169.0E 4.0-5.6 AAAAA  Loyalty Islands            

 

OCEAN RIDGES

 

O:  8DEC2018 05:24:34  54.1S   58.7W mb=4.9  EMSC   FALKLAND ISLANDS REGION      

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

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

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

 

JAPAN AND KURIL ISLANDS

 

O:  8DEC2018 01:54:04  37.0N  141.4E mb=5.0  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  8DEC2018 121802    38.0N  142.0E 4.0-5.6 AAAAA  Off East Coast Honshu      

 

O:  7DEC2018 23:13:42  36.3N  141.8E mb=5.0  EMSC   NEAR EAST COAST OF HONSHU, JAP

P:  8DEC2018 121801    35.0N  142.0E 4.0-5.7 ABAAA  Off East Coast Honshu       

 

NEIC reported this earthquake of M 5.0 off eastern Honshu, Jaan in  was felt with intensity II-III in the area(s) of Ibaraki, Chiba, and Tokyo, Japan.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA/NEVADA

 

O:  7DEC2018 10:47:56  32.9N  116.2W Ml=2.0  EMSC   SOUTHERN CALIFORNIA          

P: 11DEC2018 121807    33.0N  115.9W 2.5-4.5 BAAAA  So. California             

 

O:  7DEC2018 08:22:31  33.5N  116.8W Ml=2.4  EMSC   SOUTHERN CALIFORNIA          

P:  4DEC2018 121808    33.7N  116.1W 2.5-4.4 BAAAA  So. California             

 

O:  7DEC2018 17:59:16  34.4N  118.6W ML=2.4  EMSC   GREATER LOS ANGELES AREA, CALI

O:  7DEC2018 12:34:43  34.4N  118.6W Ml=2.1  EMSC   GREATER LOS ANGELES AREA, CALI

P:  4DEC2018 121809    34.0N  118.4W 2.5-4.4 AAAAA  So. California             

 

O:  7DEC2018 19:50:20  34.9N  116.9W Ml=2.1  EMSC   SOUTHERN CALIFORNIA          

P:  9DEC2018 121810    34.3N  117.5W 2.5-4.5 AAAAA  So. California             

 

O:  7DEC2018 07:06:44  36.7N  121.3W Md=2.9  EMSC   CENTRAL CALIFORNIA           

P:  4DEC2018 121779    36.7N  121.4W 2.5-4.4 BAAAA  Central California         

 

O:  8DEC2018 02:54:29  38.1N  118.9W ml=2.0  EMSC   CENTRAL CALIFORNIA           

P:  8DEC2018 121775    38.6N  118.6W 2.5-4.4 AAAAA  California/Nevada area      

 

O:  8DEC2018 04:22:23  38.8N  122.8W Md=2.3  EMSC   NORTHERN CALIFORNIA          

P: 11DEC2018 121781    38.9N  122.8W 2.5-4.5 BAAAA  Central California         

 

O:  7DEC2018 21:29:57  39.3N  115.0W ML=2.3  EMSC   NEVADA                       

P: 11DEC2018 121774    38.7N  115.4W 2.5-4.6 BAAAA  California/Nevada area     

 

ALASKA

 

O:  7DEC2018 22:35:27  57.0N  154.4W ML=3.3  EMSC   KODIAK ISLAND REGION, ALASKA 

P:  7DEC2018 121892    55.0N  149.0W 3.0-4.6 ABCAA  Gulf of  Alaska            

 

O:  7DEC2018 17:53:50  60.5N  151.2W Ml=3.0  EMSC   KENAI PENINSULA, ALASKA      

P:  5DEC2018 121884    60.5N  151.5W 3.2-5.0 AAAAA  Central Alaska             

 

O:  7DEC2018 19:54:53  61.3N  150.0W ML=3.7  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 21:35:10  61.4N  150.0W ML=3.4  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 12:53:16  61.4N  150.1W Ml=3.4  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 22:24:55  61.5N  150.0W ML=2.5  EMSC   SOUTHERN ALASKA              

O:  7DEC2018 22:45:07  61.5N  150.0W ML=3.0  EMSC   SOUTHERN ALASKA              

O:  8DEC2018 06:11:50  61.5N  150.0W ML=3.4  EMSC   SOUTHERN ALASKA              

P:  6DEC2018 121886    61.1N  150.2W 3.2-5.0 AAAAA  Central Alaska             

P:  8DEC2018 121884    60.9N  151.1W 3.2-5.2 AAAAA  Central Alaska             

P:  9DEC2018 121886    61.3N  150.9W 3.2-5.3 AAAAA  Central Alaska             

 

O:  7DEC2018 15:22:56  69.8N  145.0W mb=4.4  EMSC   NORTHERN ALASKA              

P:  8DEC2018 121891    69.0N  144.0W 3.0-4.6 AAAAA  Northern Alaska            

 

 

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

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

No events of M>=2 were located in the northwestern U.S. or western Canada today.

 

ROCKY MOUNTAINS REGION

 

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

 

EASTERN U.S./CANADA

 

O:  8DEC2018 06:18:11  35.7N   84.6W Md=2.7  EMSC   EASTERN TENNESSEE            

P:  8DEC2018 121788    35.0N   82.0W 2.0-3.9 AABAA  Kentucky/Tennessee/NC      

 

O:  6DEC2018 07:48:39  36.4N   92.8W md=1.5  ANSS   Bull Shoals Arkansas         

P:  5DEC2018 121793    35.0N   92.0W 2.0-4.3 ABAAA  New Madrid area            

 

HAWAII

 

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