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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.
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