MODERATE EARTHQUAKE SHAKES ANCHORAGE, ALASKA

 

EARTHQUAKE SUMMARY FOR APRIL 16, 2014

 

A moderate earthquake of M 4.9-5.1 shook central Alaska in the region of Anchorage today. This earthquake is located at 103 degree from the great Chile earthquakes of early April and was likely triggered by strong seismic energy from those  events combined with tidal effects related to the lunar eclipse and full moon of April 15. The relation between earthquakes in this region of Alaska and the great quakes off Northern Chile was emphasized in this summary on March 30 when an M 5.0-5.1 hit the area as follows:

 

" the earthquake in Alaska and in Romania are located at 103-104 degrees from the swarm of strong earthquakes in northern Chile of the past week. Seismic energy is concentrated at the surface at this distance from strong quakes and can help trigger additional seismicity in these areas." (March 30, 2014)

 

It was also noted in that summary of March 30 that tidal triggering from the new moon was likely also involved, a situation duplicated in the current situation.

 

NEIC reported this earthquake of M 5.1 in Central Alaska was felt with intensity II-III in the area(s) of Matunuska-Sustina Border, Anchorage, Fort Richardson, Elmendorf AFB, Chugiak, Cooper Landing, Eagle Rive, Palmer, Wasilla, Talkeetna, Valdez, Willow, Fairbanks, Fort Wainwright, Fairbanks, Cantwell, Anderson, Denali National Park, Alaska. Local news reported there was an earthquake noise which accompanied the quake. It occurred near local solar noon and tidal forces related to the eclipse and full moon of April 15 were probably promotional.

 

While an M 5.0-5.1 event hit about 150 km southwest of this on March 30, 2014, the last earthquake of larger or equal magnitude within 100 km of this epicenter was an M 5.2 on July 28, 2011. The last event of M>=6 in the area occurred on May 1, 1991.

 

Forecast 79597 had expected this earthquake was likely to occur in mid-April within about 50 km of this epicenter.

 

O: 16APR2014 20:24:24  62.9N  149.9W ml=5.1  ANSS   N of Talkeetna Alaska        

O: 16APR2014 04:53:39  63.6N  149.8W ml=3.4  ANSS   WSW of Healy Alaska          

P: 11APR2014 79597     62.7N  150.6W 3.2-5.5 BAAAA  Central Alaska             

 

A moderate earthquake of M 4.9-5.1 also hit the Borazjan region of Southern Iran today. There were no immediate reports of damage or casualties from this event but earthquakes of M>5 in this area often damage mud-brick buildings and cause injuries in the area. Forecast 79473 had expected this event within about  50 km of this epicenter to occur in mid-April.

 

O: 16APR2014 23:31:39  28.5N   51.6E mb=4.9  ANSS   SSE of Borazjan Iran         

O: 16APR2014 23:31:39  28.5N   51.8E ML=5.1  EMS SOUTHERN IRAN

P: 11APR2014 79473     28.0N   52.0E 3.5-5.1 BAAAA  So. Iran/Persian Gulf      

 

The seismic quiet conditions in California continued today with only three light earthquakes of M>=2 recorded in the state in the past 24 hours. Yesterday there was only one such event. In general there are 8-15 such earthquakes  in a typical 24-hour period. Distances of California from large recent earthquakes around the world suggest a stronger response should be occurring. It is possible that a seismic quiescence could be occurring in preparation for a moderate or large regional event. Such events often occur in mid-April to early May in the area, a pattern which may be related to meteorological and water conditions.

 

A strong series of light earthquakes hit near Hatillo, Puerto Rico today with at least four of M 3.0-3.5. While a strong earthquake hit the region in  mid-January with M 6.5, a major earthquake in the area is still considered likely by this summary. Swarms such as this can announce the most likely epicenter of a coming large earthquake.

 

O: 16APR2014 17:46:40  19.1N   66.8W Md=3.1  ANSS   Hatillo Puerto Rico

O: 16APR2014 17:21:59  19.2N   66.8W Md=3.1  ANSS   Hatillo Puerto Rico

O: 16APR2014 17:06:24  19.2N   66.8W Md=3.3  ANSS   Hatillo Puerto Rico

O: 16APR2014 17:34:33  19.1N   66.8W Md=3.0  ANSS   Hatillo Puerto Rico           

P: 18APR2014 79459     19.0N   66.0W 3.4-4.9 AAAAA  Puerto Rico                

 

A moderate earthquake of M 5.0-5.2 also hit the region of the Caroline Islands, Micronesia near Fais today. This earthquake was not reported felt in this remote area. It is the largest in the area within 200 km of ths epicenter since an M 5.3 on March 6, 2012 and an M 5.0 on September 19, 2010. A slightly smaller event of M 5.0 hit about 140 km northeast of this on December 20, 2013. Tropical Storm Peipah passed near this epicenter about 10 days ago and may have helped set the stage for this earthquake at this time. Forecast 79712 had expected activity in southern Marianas around April 20. This epicenter is located a the third node (120 degrees) from the Bouvet Island quake of April 15 (M 7.0).

 

O: 17APR2014 01:03:08   9.5N  141.0E mb=5.0  ANSS   ESE of Fais Micronesia       

O: 17APR2014 01:03:19   8.9N  140.6E ML=5.2  AUS       Caroline Islands, Micronesia.

P: 20APR2014 79712     13.0N  144.0E 4.0-5.5 BCCAA  So. Marianas/Guam          

 

Today's earthquake and forecast map follows. Stippled White areas are nodal distances (360/n, n an integer) from the M 7.8 earthquake in the Solomon Islands where promoted seismicity is possible.

 

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: 16APR2014 15:34:26  24.4N  121.0E ML=4.1  EMS TAIWAN

O: 16APR2014 15:24:26  24.4N  121.9E ML=4.1  TAI    Hualien, Taiwan              

P: 16APR2014 79475     23.0N  121.0E 4.0-5.4 ABAAA  Taiwan                     

 

CWB reported this earthquake was felt with intensity IV in Yilan; III in Hualien; II in Taipei and I in Nantou and Taoyuan Counties, Taiwan.

 

O: 16APR2014 20:09:29  53.2N  160.2E ML=4.3  GSR  Near east coast of  Kamchatka  

P: 14APR2014 79580     53.0N  159.0E 4.0-5.8 AAAAA  Kamchatka                  

 

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

 

INDONESIA AND PHILIPPINES

 

O: 16APR2014 06:26:38   5.0S  102.7E mb=4.8  ANSS   W of Kuripan Indonesia       

O: 16APR2014 06:26:38   5.0S  102.8E ML=5.0  BMG  II Bengkulu, Indonesia

O: 16APR2014 06:26:40   4.9S  102.8E ML=5.0  AUS       Southern Sumatra, Indonesia.

P: 19APR2014 79432      7.0S  104.0E 4.0-5.4 BABAA  So. of Sumatera            

 

BMG reported this earthquake of M 5.0 in Sumatra was felt with intensity II-III in the area(s) of Liwa and II in Bengkulu, Sumatra.

 

O: 16APR2014 17:38:24   9.4S  117.9E mb=4.7  ANSS   Boal Atas Indonesia          

O: 16APR2014 04:11:13   9.3S  118.6E mb=4.7  EMS SUMBAWA REGION, INDONESIA

P: 15APR2014 79434      8.0S  118.0E 4.0-5.4 ABAAA  Sumbawa Island area        

 

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

 

CENTRAL AND SOUTH AMERICA

 

O: 16APR2014 13:37:14   8.4N   82.7W mb=4.8  ANSS   WSW of Divala Panama         

P: 19APR2014 79438     10.0N   84.0W 3.5-5.1 BBBAA  Caribbean Sea               

 

O: 16APR2014 19:21:44  16.6S   73.8W mb=4.3  ANSS   W of Camana Peru             

P: 12APR2014 79618     17.0S   74.0W 4.0-5.5 BAAAA  So. Peru/Bolivia           

 

O: 16APR2014 08:22:08  18.5N   68.8W Md=3.4  ANSS   del Yuma Dominican Republic  

P: 24APR2014 79711     19.0N   69.0W 3.4-4.9 CAAAA  Puerto Rico                

 

O: 16APR2014 16:32:21  18.9N   64.3W Md=3.0  ANSS   Town British Virgin Islands  

O: 16APR2014 09:36:05  19.4N   64.5W Md=3.4  ANSS   Town British Virgin Islands

P: 13APR2014 79446     19.0N   64.0W 3.0-4.9 BAAAA  Leeward Islands            

 

O: 16APR2014 17:46:40  19.1N   66.8W Md=3.1  ANSS   Hatillo Puerto Rico

O: 16APR2014 17:21:59  19.2N   66.8W Md=3.1  ANSS   Hatillo Puerto Rico

O: 16APR2014 17:06:24  19.2N   66.8W Md=3.3  ANSS   Hatillo Puerto Rico

O: 16APR2014 17:34:33  19.1N   66.8W Md=3.0  ANSS   Hatillo Puerto Rico          

P: 18APR2014 79459     19.0N   66.0W 3.4-4.9 AAAAA  Puerto Rico                

 

O: 16APR2014 03:19:33  20.1S   70.8W mb=4.7  ANSS   W of Iquique Chile           

O: 16APR2014 03:14:12  20.2S   70.8W mb=5.3  ANSS   W of Iquique Chile           

P: 21APR2014 79862     20.0S   70.0W 4.0-5.5 BAAAA  Argentina                  

 

O: 15APR2014 23:14:12  13.7N   92.9W ML=4.1  UNAM    SUROESTE de CD HIDALGO, CHIS

O: 16APR2014 01:43:28  14.2N   93.2W ML=4.2  UNAM    SUROESTE de CD HIDALGO, CHIS

O: 16APR2014 09:15:03  14.5N   95.1W ML=4.2  UNAM    SURESTE de CRUCECITA, OAX   

P: 19APR2014 79439     14.0N   94.0W 3.5-5.2 BAAAA  Chiapas, Mexico            

 

O: 16APR2014 08:14:14  15.8N   97.2W ML=4.0  UNAM   SUROESTE de PUERTO ESCONDIDO,

O: 16APR2014 10:46:57  16.2N   98.2W ML=3.6  UNAM   SUROESTE de PINOTEPA NACIONAL,

O: 16APR2014 04:43:26  16.3N   98.3W ML=3.8  UNAM   SUROESTE de PINOTEPA NACIONAL,

P: 16APR2014 79456     16.0N   99.0W 3.5-5.1 AAAAA  Oaxaca, Mexico             

 

O: 16APR2014 09:11:30  17.0N   99.0W ML=3.9  UNAM   NORESTE de SAN MARCOS, GRO   

P: 18APR2014 79458     19.0N   99.0W 3.5-5.2 ABAAA  Oaxaca, Mexico             

P: 19APR2014 79456     18.0N   99.0W 3.5-5.3 BAAAA  Oaxaca, Mexico             

 

O: 16APR2014 06:31:01  17.2N  101.3W ML=3.9  UNAM   SUR de PETATLAN, GRO         

P: 19APR2014 79449     17.0N  102.0W 3.5-5.2 BAAAA  Michoacan, Mexico          

 

O: 16APR2014 12:10:00  32.8N  114.8W ML=3.7  UNAM   NORTE de S LUIS R COLORADO, SO

P: 16APR2014 79517     32.9N  115.6W 2.5-4.7 AAAAA  So. California             

 

AFRICA AND EUROPE

 

O: 16APR2014 23:49:50  36.2N   31.4E mb=4.3  ANSS   SW of Avsallar Turkey         

P: 11APR2014 79527     37.0N   29.0E 3.5-5.3 BABAA  Turkey                     

 

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

 

SOUTHWEST PACIFIC

 

O: 16APR2014 16:07:52   5.0S  152.2E mb=4.8  ANSS   Kokopo Papua New Guinea       

O: 16APR2014 20:00:06   6.7S  154.9E mw=5.4  ANSS   Panguna Papua New Guinea     

O: 16APR2014 20:00:06   6.9S  155.1E ML=5.3  AUS       Bougainville Island Region, PNG.

O: 16APR2014 22:43:27   7.1S  155.0E mb=4.8  ANSS   Panguna Papua New Guinea      

P: 22APR2014 79676      6.0S  153.0E 4.0-5.8 CABAA  New Britain                

 

O: 16APR2014 10:24:45  11.1S  161.6E mb=4.7  ANSS   Kirakira Solomon Islands     

O: 16APR2014 11:43:49  11.1S  161.6E mb=4.9  ANSS   Kirakira Solomon Islands     

O: 16APR2014 10:00:15  11.6S  162.2E mb=4.6  ANSS   Kirakira Solomon Islands     

P: 17APR2014 79622     11.0S  162.0E 4.0-5.6 AAAAA  Vanuatu Islands            

 

O: 16APR2014 03:33:47  18.0S  177.9W ML=5.3  AUS       Fiji Islands Region.

O: 16APR2014 03:33:46  18.1S  178.0W mb=4.7  ANSS   Ndoi Island Fiji             

P: 11APR2014 79621     19.0S  177.0W 4.0-5.6 BAAAA  Tonga Islands              

 

OCEAN RIDGES

 

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

 

NEW ZEALAND AND AUSTRALIA REGION

 

O: 15APR2014 13:20:07  38.3S  177.1E ML=4.0  IGNS   New Zealand                  

P: 19APR2014 79638     38.0S  177.0E 3.0-4.6 BAAAA  North Island, N.Z.         

 

GeoNet reported this earthquake of M 4.0 in North Island, New Zealand was felt with light to moderate intensity in the area(s) of Opotiki, Murupara, Ohope, New Zealand.

 

JAPAN AND KURIL ISLANDS

 

The earthquake epicenter of the M 7.0 in the Bouvet Island region of the South Atlantic is located at 144 degrees from Japan and Central and Northern California. Increased seismicity in and off Honshu, Japan today may be related to this as the area is also at 144-145 degrees from the great quakes in the northern Chile area of early April. While much of the coast of Japan is currently in a seismic shadow period following the great M 9.0 quake of March, 2011, seismicity at either end of this rupture zone can still include a major quake upcoming.

 

O: 16APR2014 14:12:53  36.1N  141.9E mb=4.5  ANSS   ENE of Hasaki Japan          

P: 18APR2014 79511     35.0N  140.0E 4.0-5.5 ABAAA  Off East Coast Honshu      

 

O: 16APR2014 17:49:32  37.1N  143.5E mb=4.6  ANSS   E of Namie Japan             

O: 16APR2014 18:17:24  37.3N  142.1E mb=4.9  ANSS   ESE of Namie Japan           

O: 16APR2014 18:17     37.3N  142.2E Mj=5.1  NIED   E_OFF_FUKUSHIMA_PREF, Japan

P: 10APR2014 79512     38.0N  142.0E 4.0-5.4 CAAAA  Off East Coast Honshu      

 

JMA reported this earthquake of M 5.1 off eastern Honshu  was felt with intensity III in the area(s) of Fukushima, II in Miyagi, Yamagata, Ibaraki, Tochigi, Gunma, Saitama, Chiba, and I in Iwate, Tokyo, Kanagawa and Niigata Prefectures, Japan.

 

O: 16APR2014 17:20:11  38.3N  142.0E mb=4.6  ANSS   E of Ishinomaki Japan        

O: 16APR2014 17:20     38.3N  141.9E Mj=4.2  NIED   E_OFF_MIYAGI_PREF, Japan

P: 18APR2014 79512     39.0N  141.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

JMA reported this earthquake of M 4.2 off northeastern Honshu  was felt with intensity III in the area(s) of Miyagi, II in Iwate, Aomori and Fukushima Prefectures, Japan.

 

O: 16APR2014 12:16:20  39.2N  142.2E mb=4.4  ANSS   E of Kamaishi Japan          

P: 18APR2014 79512     39.0N  141.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 17APR2014 00:05:13  34.0N  116.6W ml=2.3  ANSS   Morongo Valley California    

O: 17APR2014 00:05:13  34.0N  116.6W ML=2.3  NCSN    Morongo Valley, CA

P: 16APR2014 79518     33.9N  116.9W 2.5-4.4 AAAAA  So. California             

 

O: 16APR2014 16:42:51  38.8N  122.8W ML=2.7  NCSN    The Geysers, CA

O: 16APR2014 16:42:51  38.8N  122.8W Md=2.7  ANSS   W of Cobb California         

P: 18APR2014 79486     38.7N  122.7W 2.5-4.4 AAAAA  Central California         

 

NEIC reported this earthquake of M 2.7 in Northern California was felt with intensity II-III in the area(s) of Calistoga, California.

 

O: 16APR2014 18:44:27  39.5N  122.3W Md=2.1  ANSS   W of Willows California      

O: 16APR2014 18:44:27  39.5N  122.3W ML=2.1  NCSN    Willows, CA

P: 15APR2014 79487     39.3N  123.2W 2.5-4.7 AAAAA  Central California         

 

ALASKA

 

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

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 16APR2014 11:58:09  49.1N  127.9W ML=3.4  NRCA   WSW of  Gold  R., BC         

P: 24APR2014 79813     49.0N  126.0W 2.8-5.1 CAAAA  Vancouver Island area      

 

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: 16APR2014 16:52:08  36.2N   97.3W ml=2.7  ANSS   S of Perry Oklahoma          

P: 19APR2014 79526     36.0N   97.0W 2.0-3.9 BAAAA  Southern Plains            

 

HAWAII

 

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