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.
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