ANTIPODAL AREAS OF VIRGIN ISLANDS; JAVA ACTIVE

 

EARTHQUAKE SUMMARY FOR FEBRUARY 18, 2019

 

Antipodal areas of the Virgin Islands/Puerto Rico(M 4.8-4.9)  and Java Indonesia (M 5.6-5.9) saw unusual, felt earthquakes today. These were joined by an unusually large aftershock of M 4.6 in the Anchorage, Alaska zone. This activity was expected to be associated with the new moon which is complete today.  The moderate earthquake occurred with M 4.9 in the Virgin Islands, Caribbean today. NEIC reported it was felt with intensity IV in Bayamon, Puerto Rico and II-III in Road Town, Tortola, British Virgin Islands; Saint Thomas and Saint John, American Virgin Islands and in Puerto Rico at Fajardo, Luquillo, San Juan, Trujillo, Toa Baja, and Bayamon, Puerto Rico. This event was probably triggered by high tidal stresses associated with the super-moon which arrives today. This summary had noted this antipodal possibility in previous issues as:

 

 

"The full moon will arrive on February 19, 2019 at 15:53 UT. Longitudes which are in the western hemisphere near 55W and in the east at 125E will experience maximum tidal stresses at this time.  portions of the Atlantic Ocean in the w st and Taiwan, Indonesia and the Philippines, among others in the east. A strong earthquake is likely in the next seven days promoted by tidal stresses. Such earthquakes often occur near local solar noon and midnight. Many other areas could also see tidally promoted seismicity, especially those where fluids (magma and water) are important in local seismicity. This is a super-moon in which the moon makes its closest approach to the earth. This considerably increases the strength of tidal stresses at this time. These include the eastern Caribbean." (February 15-18. 2019)

 

and

 

"An earthquake of M 3.5 shook areas of Puerto Rico today. This is an area which could be affected by strong tides with the full moon on February 19. More such regional seismicity is likely at that time." (February 16-17, 2019)

 

While an M 4.9 occurred within about 200 km of today's epicenter on November 14, 2018, the last such event with greater magnitude in the Virgin Islands was an M 5.0 on January 10, 2013 more than six years ago. Forecasts 113454 and 113466 had expected today's event was likely within about 50 km around February 19.

 

O: 19FEB2019 00:23:57  19.1N   64.4W Md=3.3  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 00:01:43  19.3N   64.6W Md=3.4  EMSC   VIRGIN ISLANDS REGION        

O: 18FEB2019 23:45:08  19.4N   64.7W Md=3.4  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 01:01:15  19.4N   64.8W Md=3.0  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 01:35:07  19.4N   64.8W Md=3.3  EMSC   VIRGIN ISLANDS REGION        

O: 18FEB2019 23:38:05  19.4N   64.9W Mw=4.9  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 01:15:26  19.5N   65.0W Md=3.3  EMSC   VIRGIN ISLANDS REGION        

O: 18FEB2019 23:56:56  19.7N   65.1W Md=3.2  EMSC   VIRGIN ISLANDS REGION        

P: 19FEB2019 113454    19.0N   64.0W 3.0-5.1 AAAAA  Leeward Islands            

P: 19FEB2019 113466    19.0N   66.0W 3.4-5.1 AAAAA  Puerto Rico                

 

The strongest earthquake in the world today occurred in the region south of Java, Indonesia with M 5.6 (EMSC) to M 5.9 (BMG). NEIC reported it was felt lightly with intensity II in Java at Malang, Kedungwani, Ponorogo and in Kuta and Denpasar, Bali, Indonesia. BMG reported it was felt with intensity III-IV in Lumajang, III in Malang, Karangkates, Blitar, Sawahan and II-III in Kuta and Nusa Dua, Java, Indonesia. It was followed by a series of moderate aftershocks. The mainshock occurred near local solar midnight and was probably promoted by tidal stresses associated with the full moon. The last earthquake with M>=5.6 within about 250 km of this epicenter occurred as an M 5.7 on November 16, 2016 (M 5.7). The last in this area of M>=5.9 was an M 6.0 on July 26, 2015. Forecast 113436 had expected this event within about 50 km of today's epicenter was likely around February 16. This epicenter is located at 102 degrees from the M 7.1 in Anchorage, Alaska of November 30, 2018 and at 104 degrees from the event in the South Sandwich Islands of December 11, 2018 (M 7.1). This is a distance at which seismic energy is concentrated on the earth's surface following strong earthquakes and triggering is likely.

  

O: 18FEB2019 22:59:54   8.9S  113.1E ML=4.2  EMSC   JAVA, INDONESIA              

O: 19FEB2019 06:08:43   9.4S  112.9E ML=4.1  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 19:30:27   9.4S  112.9E Mw=5.6  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 19:30:22   9.5S  112.9E mw=5.6  ANSS   Krajan Tambakrejo Indonesia

O: 18FEB2019 19:30:23  09.7S  112.7E MS=5.9  BMG  Felt with intensity III-IV

O: 18FEB2019 23:52:56   9.5S  112.8E ML=4.5  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 22:03:00   9.6S  112.8E ML=3.9  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 20:18:45   9.7S  112.8E ML=3.7  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 21:45:28   9.7S  112.8E ML=3.7  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 22:21:38   9.7S  112.8E ML=4.3  EMSC   SOUTH OF JAVA, INDONESIA     

P: 16FEB2019 113436     9.0S  113.0E 4.0-5.4 AAAAA  So. of Bali                

 

The strongest earthquake in the U.S. or Canada today was a moderate M 4.4 in the Anchorage, Alaska aftershock zone. NEIC reported it was felt with maximum intensity IV in Anchorage and Elmendorf, AFB, Alaska and II-III in Fort Richardson, Willow, Wasilla, Alaska. This earthquake is the strongest aftershock in the Anchorage, Alaska zone where an M 7.1 on November 30, 2018 has been followed by numerous smaller aftershocks in the past two months. The last event of M>=4.6 in the area occurred more than a month ago on January 13, 2019 with M 5.0. Only four aftershocks of M>=4.6 have occurred since the immediate aftershocks of early December, 2018. Forecast 113613 had expected this event was likely around February 17.

 

O: 18FEB2019 17:02:45  61.4N  149.9W mb=4.6  EMSC   SOUTHERN ALASKA              

O: 19FEB2019 06:59:07  61.9N  149.3W ml=3.5  EMSC   SOUTHERN ALASKA               

P: 17FEB2019 113613    61.3N  150.9W 3.2-4.9 AAAAA  Central Alaska             

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

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

 

ASIA

 

O: 18FEB2019 09:48:46  28.6N   66.9E mb=4.6  EMSC   PAKISTAN                     

P: 19FEB2019 113476    23.0N   70.0E 3.5-5.1 ACBAA  India                      

 

O: 19FEB2019 00:26:44  53.5N  161.4E mb=4.7  EMSC   OFF EAST COAST OF KAMCHATKA  

P: 19FEB2019 113596    52.0N  159.0E 4.0-5.7 ABBAA  Kamchatka                  

 

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

 

INDONESIA AND PHILIPPINES

 

O: 18FEB2019 20:45:27   1.0N  126.2E ML=4.0  EMSC   MOLUCCA SEA                  

P: 16FEB2019 113417     2.0N  126.0E 4.0-5.5 AAAAA  Mindanao, Philippines      

 

O: 18FEB2019 22:11:38   2.2N   96.2E mb=4.3  EMSC   SIMEULUE, INDONESIA          

P: 20FEB2019 113419     2.0N   95.0E 4.0-5.6 AAAAA  Nicobar Islands             

 

O: 18FEB2019 17:49:50   2.3N  128.8E mb=4.6  EMSC   HALMAHERA, INDONESIA         

P: 18FEB2019 113415     4.0N  129.0E 4.0-5.4 ABAAA  Halmahera                  

 

O: 18FEB2019 15:01:34   6.6S  129.8E mb=4.5  EMSC   BANDA SEA                     

P: 18FEB2019 113421     6.0S  129.0E 4.0-5.4 AAAAA  Banda Sea                  

 

O: 18FEB2019 22:59:54   8.9S  113.1E ML=4.2  EMSC   JAVA, INDONESIA              

O: 19FEB2019 06:08:43   9.4S  112.9E ML=4.1  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 19:30:27   9.4S  112.9E Mw=5.6  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 19:30:22   9.5S  112.9E mw=5.6  ANSS   Krajan Tambakrejo Indonesia

O: 18FEB2019 23:52:56   9.5S  112.8E ML=4.5  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 22:03:00   9.6S  112.8E ML=3.9  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 20:18:45   9.7S  112.8E ML=3.7  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 21:45:28   9.7S  112.8E ML=3.7  EMSC   SOUTH OF JAVA, INDONESIA     

O: 18FEB2019 22:21:38   9.7S  112.8E ML=4.3  EMSC   SOUTH OF JAVA, INDONESIA     

P: 16FEB2019 113436     9.0S  113.0E 4.0-5.4 AAAAA  So. of Bali                

 

O: 18FEB2019 14:25:31  10.1S  119.2E ML=3.9  EMSC   SUMBA REGION, INDONESIA      

P: 17FEB2019 113639    11.0S  118.0E 4.0-5.5 AAAAA  So. of Indonesia           

 

CENTRAL AND SOUTH AMERICA

 

O: 19FEB2019 05:09     28.0S   71.4W mb=4.8  GUC    Atacamba at Alto del Carmen, C

P: 17FEB2019 113649    29.0S   70.0W 4.0-5.5 AAAAA  Coast Central Chile        

P: 19FEB2019 113648    28.0S   68.0W 4.0-5.5 AACAA  Argentina                  

 

CSN reported this earthquake was felt with intensity IV in Chile in Atacamba at Alto del Carmen, Copiapo, Freirina, Huasco, Tierra Amarilla and Vallenar and in Coquimbo at La Higuera and La Serena with intensity III.

 

O: 19FEB2019 06:11:42  11.1S   75.6W mb=4.5  EMSC   CENTRAL PERU                 

P: 13FEB2019 113629    11.0S   74.0W 4.0-5.6 CABAA  Central Peru               

 

O: 18FEB2019 11:59:58  14.5N   93.3W ML=4.2  EMSC   OFFSHORE CHIAPAS, MEXICO     

O: 19FEB2019 06:48:48  14.5N   93.8W ML=4.3  EMSC   OFF COAST OF CHIAPAS, MEXICO 

P: 17FEB2019 113446    14.0N   93.0W 3.5-5.4 AAAAA  Chiapas, Mexico            

 

O: 19FEB2019 04:37:00  15.4S   73.2W ML=4.1  EMSC   SOUTHERN PERU                

P: 12FEB2019 113637    16.0S   73.0W 4.0-5.6 CAAAA  So. Peru/Bolivia           

P: 20FEB2019 113630    15.0S   71.0W 4.0-5.6 AABAA  Central Peru               

 

O: 18FEB2019 16:11:51  15.8N   95.2W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P: 19FEB2019 113446    16.0N   95.0W 3.5-5.2 AAAAA  Chiapas, Mexico            

 

O: 19FEB2019 05:42:34  16.0N   98.0W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

O: 18FEB2019 12:08:25  16.8N   98.2W ML=4.0  EMSC   GUERRERO, MEXICO             

P: 21FEB2019 113465    16.0N   98.0W 3.5-5.1 AAAAA  Oaxaca, Mexico             

 

O: 18FEB2019 22:48:00  17.6S   71.5W ML=4.0  EMSC   NEAR COAST OF SOUTHERN PERU  

P: 19FEB2019 113637    17.0S   71.0W 4.0-5.6 AAAAA  So. Peru/Bolivia           

 

O: 18FEB2019 09:28:09  18.9N  104.5W ML=3.9  EMSC   OFFSHORE COLIMA, MEXICO      

P: 14FEB2019 113459    19.0N  104.0W 3.5-5.1 BAAAA  Michoacan, Mexico          

 

O: 19FEB2019 00:23:57  19.1N   64.4W Md=3.3  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 00:01:43  19.3N   64.6W Md=3.4  EMSC   VIRGIN ISLANDS REGION        

O: 18FEB2019 23:45:08  19.4N   64.7W Md=3.4  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 01:01:15  19.4N   64.8W Md=3.0  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 01:35:07  19.4N   64.8W Md=3.3  EMSC   VIRGIN ISLANDS REGION        

O: 18FEB2019 23:38:05  19.4N   64.9W Mw=4.9  EMSC   VIRGIN ISLANDS REGION        

O: 19FEB2019 01:15:26  19.5N   65.0W Md=3.3  EMSC   VIRGIN ISLANDS REGION        

O: 18FEB2019 23:56:56  19.7N   65.1W Md=3.2  EMSC   VIRGIN ISLANDS REGION        

P: 19FEB2019 113454    19.0N   64.0W 3.0-5.1 AAAAA  Leeward Islands            

P: 19FEB2019 113466    19.0N   66.0W 3.4-5.1 AAAAA  Puerto Rico                

 

O: 19FEB2019 03:11:10  24.0S   66.7W mb=4.8  EMSC   JUJUY, ARGENTINA             

P: 15FEB2019 113647    24.0S   64.0W 4.0-5.8 BABAA  Argentina                  

 

O: 19FEB2019 05:09:42  28.0S   71.5W Mw=4.8  EMSC   OFFSHORE ATACAMA, CHILE      

P: 17FEB2019 113649    29.0S   70.0W 4.0-5.5 AAAAA  Coast Central Chile        

 

AFRICA AND EUROPE

 

O: 18FEB2019 16:31:32  38.6N   44.2E ML=4.1  EMSC   TURKEY-IRAN BORDER REGION    

P: 13FEB2019 113542    38.0N   43.0E 3.5-4.9 BAAAA  Turkey                     

 

O: 18FEB2019 14:16:36  45.6N   26.5E ML=3.8  EMSC   ROMANIA                      

P: 16FEB2019 113576    46.0N   26.0E 3.0-5.2 AAAAA  Romania/NW Turkey          

 

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

 

SOUTHWEST PACIFIC

 

O: 19FEB2019 05:23:46   4.9S  153.4E mb=5.0  EMSC   NEW IRELAND REGION, P.N.G.   

P: 18FEB2019 113429     4.0S  152.0E 4.0-5.6 AAAAA  New Britain                

 

O: 18FEB2019 15:46:42  19.2S  172.9W mb=4.9  EMSC   TONGA REGION                 

P: 15FEB2019 113643    19.0S  176.0W 4.0-5.7 BACAA  Tonga Islands              

P: 17FEB2019 113641    17.0S  173.0W 4.0-5.6 ACAAA  Tonga Islands              

 

O: 19FEB2019 02:05:39  21.5S  174.6W mb=5.2  EMSC   TONGA                        

P: 13FEB2019 113658    23.0S  175.0W 4.0-5.6 CBAAA  Tonga Islands              

 

 

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

 

OCEAN RIDGES

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

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

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

 

JAPAN AND KURIL ISLANDS

 

O: 18FEB2019 07:32:18  25.4N  125.1E mb=4.6  EMSC   SOUTHWESTERN RYUKYU ISL., JAPA

P: 20FEB2019 113485    24.0N  123.0E 4.0-5.4 ABBAA  Taiwan                     

 

O: 18FEB2019 08:01:11  30.5N  138.5E mb=4.2  EMSC   IZU ISLANDS, JAPAN REGION    

P: 14FEB2019 113518    30.0N  142.0E 4.0-5.4 BACAA  Off East Coast Honshu      

 

O: 18FEB2019 15:16:29  50.0N  154.7E mb=4.8  EMSC   KURIL ISLANDS                

P: 19FEB2019 113596    50.0N  156.0E 4.0-5.9 AAAAA  Kamchatka                  

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 19FEB2019 03:24:53  33.5N  116.8W ML=2.2  EMSC   SOUTHERN CALIFORNIA          

P: 15FEB2019 113528    33.4N  116.7W 2.5-4.5 BAAAA  So. California             

 

O: 19FEB2019 00:49:37  34.0N  117.0W Ml=2.5  EMSC   SOUTHERN CALIFORNIA          

P: 16FEB2019 113531    34.3N  117.5W 2.5-4.4 BAAAA  So. California              

 

NEIC reported this earthquake of M 2.5 east of Los Angeles, California was felt with intensity II-III in the area(s) of Redlands, California.

 

O: 18FEB2019 17:11:04  35.6N  120.8W Md=2.1  EMSC   CENTRAL CALIFORNIA           

P: 14FEB2019 113496    36.2N  120.8W 2.5-4.6 BAAAA  Central California         

 

O: 19FEB2019 01:47:37  36.7N  121.3W Md=2.4  EMSC   CENTRAL CALIFORNIA           

P: 18FEB2019 113497    36.4N  121.0W 2.5-4.6 AAAAA  Central California         

 

O: 18FEB2019 21:50:00  37.1N  117.9W ml=2.5  EMSC   CENTRAL CALIFORNIA           

P: 17FEB2019 113491    37.3N  118.3W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 18FEB2019 23:34:48  37.4N  121.5W Md=2.9  EMSC   NORTHERN CALIFORNIA          

P: 21FEB2019 113498    37.2N  122.1W 2.5-4.6 BAAAA  Central California         

 

NEIC reported this earthquake of M 2.9 in the region south of San Francisco, California was felt with intensity II-III in the area(s) of San Jose, Miliptas,, and San Francisco, California.

 

O: 18FEB2019 20:46:51  37.5N  118.8W Md=2.2  EMSC   CENTRAL CALIFORNIA           

P: 17FEB2019 113491    37.3N  118.3W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 18FEB2019 09:59:42  38.7N  122.7W Md=2.6  EMSC   NORTHERN CALIFORNIA          

P: 16FEB2019 113499    38.7N  122.7W 2.5-4.6 AAAAA  Central California         

 

NEIC reported this earthquake of M 2.6 in the Geysers, California was felt with intensity II-III in the area(s) of Cloverdale, California.

 

ALASKA

 

O: 19FEB2019 03:26:51  59.4N  146.9W ml=3.5  EMSC   GULF OF ALASKA               

P: 20FEB2019 113612    60.5N  148.5W 3.2-4.9 ABBAA  Central Alaska             

 

O: 18FEB2019 17:02:45  61.4N  149.9W mb=4.6  EMSC   SOUTHERN ALASKA              

O: 19FEB2019 06:59:07  61.9N  149.3W ml=3.5  EMSC   SOUTHERN ALASKA              

P: 17FEB2019 113613    61.3N  150.9W 3.2-4.9 AAAAA  Central Alaska             

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 18FEB2019 01:35:41  50.4N  130.4W ML=3.1  NRCA  215 km W   of Pt. Hardy       

O: 17FEB2019 17:28:30  50.5N  130.3W ML=3.3  NRCA  207 km W   of Pt. Hardy       

P: 18FEB2019 113591    50.4N  130.2W 3.0-4.9 AAAAA  British Colombia           

 

O: 18FEB2019 16:58:40  47.3N  121.5W Md=2.2  EMSC   WASHINGTON                   

P: 21FEB2019 113582    47.5N  121.8W 2.0-4.1 BAAAA  Washington state, U.S.     

 

ROCKY MOUNTAINS REGION

 

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

 

EASTERN U.S./CANADA

 

O: 18FEB2019 06:54:47  36.5N   89.6W md=1.7  ANSS   SSW of Lilbourn Missouri     

O: 18FEB2019 01:07:46  37.2N   88.8W md=2.0  ANSS   WNW of Metropolis Illinois   

P: 20FEB2019 113511    36.5N   89.6W 2.0-4.0 AAAAA  New Madrid area            

 

O: 18FEB2019 06:39:04  47.8N   69.9W ML=2.2  NRCA  CHARLEVOIX SEISMIC ZONE       

P: 18FEB2019 113557    47.0N   70.0W 2.0-3.9 AAAAA  Maine                      

 

O: 17FEB2019 13:14:41  47.6N   70.2W ML=1.2  NRCA  CHARLEVOIX SEISMIC ZONE       

P: 17FEB2019 113563    47.3N   70.5W 2.0-4.0 AAAAA  New England                

 

O: 17FEB2019 11:39:17  62.1N   61.6W ML=3.5  NRCA  193 km NE from Resolution Islan

 

O: 16FEB2019 09:26:12  73.4N   71.8W ML=2.5  NRCA  218 km NE from Pond Inlet     

P: 14FEB2019 113625    73.3N   73.5W 2.5-4.1 AAAAA  Baffin/Davis Strait Canada 

 

O: 16FEB2019 03:18:30  74.4N   85.9W ML=2.1  NRCA  108 km W from Dundas Harbour  

 

HAWAII

 

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