CARLSBERG RIDGE, SOCOTRA ADD SEISMICITY TO CONTINUING SOLOMON IS SWARM

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 19, 2018

 

The strongest earthquake in the world today continued activity in the Solomon Islands where an M 5.8 occurred yesterday. The strongest quakes in the area today were M 5.7 and 5.1. This activity joined moderate to moderately large events in the Gulf of Aden, Socotra and the Carlsberg Ridge in the Iranian subduction zone area. None of these events were reported felt but may indicate a stronger quake is in the offing in the area.

 

The earthquakes in the Solomon Islands had been anticipated in forecast 119728 to occur around September 17 within about 25 km of today's epicenter.

 

O: 20SEP2018 06:45:01   8.9S  158.3E mb=5.1  EMSC   SOLOMON ISLANDS               

O: 20SEP2018 06:13:58   9.0S  158.2E mb=4.9  EMSC   SOLOMON ISLANDS              

O: 20SEP2018 05:47:36   9.0S  158.3E Mw=5.7  EMSC   SOLOMON ISLANDS              

P: 17SEP2018 119728     9.0S  158.0E 4.0-5.6 BAAAA  Solomon Islands             

 

The events of M 5.4 and 4.6 in the Carlsberg Ridge and Socotra regions occurred south of the expected activity in forecast 119735 but within two days of the expected time. The last earthquake of M>=5.4 in the Carlsberg Ridge region within about 250 km of this epicenter was an M 5.4 on February 10, 2015.

 

O: 19SEP2018 08:53:13  10.4N   56.9E mb=5.4  EMSC   CARLSBERG RIDGE              

O: 20SEP2018 04:10:02  11.2N   56.7E mb=4.6  EMSC   SOCOTRA REGION               

P: 18SEP2018 119735    15.0N   56.0E 3.5-5.0 ACAAA  Arabian Sea                

 

The event in the Gulf of Aden had been expected within about 50 km of the epicenter to occur in Mid-September in forecast 119744.

 

O: 19SEP2018 09:14:53  13.2N   50.6E mb=4.4  EMSC   GULF OF ADEN                  

P: 15SEP2018 119744    13.0N   51.0E 3.5-5.0 BAAAA  Gulf of Aden               

 

A moderately large quake of M 5.4 also occurred in the Northern Mariana Islands today. This continues moderate quakes in the region which included an M 6.4 on August 28 and  an M 5.7 on July 29. The most recent such event in the area was an M 5.3 on September 15 and September 3, 2018 both within about 100 km of today's epicenter. Most of these occurred shortly after typhoons passed through the area, Forecast 119752 expected this activity was likely around September 16.

 

NEIC reported this earthquake of M 5.4 in the Central Mariana Islands was felt with intensity II-III in the area(s) of Tinian, MP, Maraianas.

 

O: 20SEP2018 04:55:35  17.0N  145.7E mb=5.4  EMSC   ANATAHAN REG, N. MARIANA ISLAN

P: 16SEP2018 119752    18.0N  145.0E 4.0-5.4 BAAAA  No. Marianas               

 

The strongest activity in the U.S. or Canada today continued in the region of Northern Alaska where an M 4.9, the strongest since August 12 mainshock occurred yesterday. Today's largest event was M 3.9. Forecast 119911 had expected this enhanced activity was likely around September 18.

 

 

O: 19SEP2018 22:12:42  69.5N  144.3W ML=3.9  EMSC   NORTHERN ALASKA              

O: 19SEP2018 20:09:39  69.5N  144.4W Ml=3.1  EMSC   NORTHERN ALASKA              

O: 19SEP2018 15:40:49  69.6N  145.2W ML=3.0  EMSC   NORTHERN ALASKA              

P: 18SEP2018 119911    69.4N  144.8W 3.0-4.9 AAAAA  Northern Alaska            

 

Seismicity also continued in the region of Antofagasta, Chile and Jujuy, Argentina.  This region is at the antipode of the area where Typhoon Mangkhut made landfall over the past several days. Energy from this storm may have focused at the antipode and helped trigger this Southern American seismicity. Forecast 119937 expected this activity was likely around September 17. The largest of these events today was an M 5.0 off the coast of Tarapaca, Chile. Similar earthquakes have most recently occurred in the Tarapac area on August 4, 2018 and August 14, 2018 with M 5.1-5.2. Forecast 119947 had expected this event in Tarapaca was likely around September 19.  .

 

CNS reported this earthquake was felt with intensity V in  Arica at Cuya; IV at Arica and Codpa and III in Pocon Chile; Tarapaca with IV in Alto Hospicio, Camina, Huara, Iquique, La Tirana, Pozo Almonte, and III in Mamina, Pica, and Pisagua, Chile. NEIC reported this earthquake of M 5.0 in Tarapaca, Chile was felt with intensity V in Iquique, Tarapaca and II-III in the area(s) of Arica, Chile.

 

O: 19SEP2018 13:42:02  21.1S   68.5W ML=4.1  EMSC   ANTOFAGASTA, CHILE           

O: 19SEP2018 14:02:18  22.4S   66.1W mb=4.5  EMSC   JUJUY, ARGENTINA             

P: 17SEP2018 119937    22.0S   68.0W 4.0-5.8 AABAA  Argentina                  

 

O: 19SEP2018 18:42:20  19.6S   70.3W Mw=5.0  EMSC   OFFSHORE TARAPACA, CHILE     

O: 19SEP2018 18:42     19.5S   70.4W mb=5.0  GUC    Arica at Cuya; IV at Arica and

P: 19SEP2018 119947    20.0S   69.0W 4.0-5.4 AAAAA  So. Peru/Bolivia           

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: 19SEP2018 19:57:30  28.6N   82.9E ML=4.0  EMSC   NEPAL                         

P: 18SEP2018 119837    30.0N   80.0E 3.8-5.4 ABBAA  Xizang                     

 

O: 19SEP2018 12:41:05  33.6N   49.1E ML=4.0  EMSC   WESTERN IRAN                 

P: 20SEP2018 119825    34.0N   49.0E 3.8-5.3 AAAAA  So. Iran                    

 

O: 19SEP2018 19:29:21  33.7N   45.8E ML=4.5  EMSC   IRAN-IRAQ BORDER REGION      

P: 20SEP2018 119825    34.0N   49.0E 3.8-5.3 AACAA  So. Iran                   

 

O: 19SEP2018 07:42:00  54.1N  160.3E mb=4.2  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 17SEP2018 119889    55.0N  160.0E 4.0-5.4 AAAAA  E. of Kamchatka            

 

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

 

INDONESIA AND PHILIPPINES

 

O: 19SEP2018 11:14:42   2.1N   99.5E mb=4.3  EMSC   NORTHERN SUMATRA, INDONESIA  

P: 17SEP2018 119710     1.0N   98.0E 4.0-5.4 ABBAA  So. Sumatera               

 

O: 20SEP2018 02:36:42   4.5N  127.9E mb=5.1  EMSC   KEPULAUAN TALAUD, INDONESIA  

P: 18SEP2018 119707     6.0N  127.0E 4.0-5.4 ABAAA  Halmahera                  

 

O: 20SEP2018 04:55:35  17.0N  145.7E mb=5.4  EMSC   ANATAHAN REG, N. MARIANA ISLAN

P: 16SEP2018 119752    18.0N  145.0E 4.0-5.4 BAAAA  No. Marianas               

 

 

CENTRAL AND SOUTH AMERICA

 

O: 19SEP2018 23:23:50  16.2N   98.1W ML=4.0  EMSC   OAXACA, MEXICO               

P: 19SEP2018 119754    17.0N   98.0W 3.5-5.5 AAAAA  Oaxaca, Mexico             

 

O: 19SEP2018 16:37:02  16.7N   99.8W ML=4.3  EMSC   OFFSHORE GUERRERO, MEXICO    

O: 19SEP2018 09:14:46  17.0N  100.0W ML=4.0  EMSC   GUERRERO, MEXICO              

P: 22SEP2018 119754    16.0N   99.0W 3.5-5.4 BAAAA  Oaxaca, Mexico             

 

O: 20SEP2018 04:01:45  18.3N  101.6W ML=4.1  EMSC   GUERRERO, MEXICO             

P: 21SEP2018 119749    18.0N  102.0W 3.5-5.2 AAAAA  Michoacan, Mexico          

 

O: 19SEP2018 18:42:20  19.6S   70.3W Mw=5.0  EMSC   OFFSHORE TARAPACA, CHILE     

P: 19SEP2018 119947    20.0S   69.0W 4.0-5.4 AAAAA  So. Peru/Bolivia           

 

O: 19SEP2018 13:42:02  21.1S   68.5W ML=4.1  EMSC   ANTOFAGASTA, CHILE           

O: 19SEP2018 14:02:18  22.4S   66.1W mb=4.5  EMSC   JUJUY, ARGENTINA             

P: 17SEP2018 119937    22.0S   68.0W 4.0-5.8 AABAA  Argentina                  

 

O: 19SEP2018 11:28:07  39.8S   73.0W mb=4.4  EMSC   LOS LAGOS, CHILE             

O: 19SEP2018 11:28     39.8S   73.0W mb=4.3  GUC    La Araunica at Loncoche and Vi

P: 22SEP2018 119952    39.0S   73.0W 4.0-5.8 BAAAA  Central Chile              

 

NEIC reported this earthquake of M 4.4 in Central Chile was felt with intensity II-III in the area(s) of Los Lagos at Valdivia and Rio Bueno, Chile.

 

CNS reported this earthquake was felt with intensity IV in  La Araunica at Loncoche and Villarrica and III in Pucon; in Los Rios with IV in Mariquina, Mehuin, Panguipulli and Valdivia; III in Corral and Mafil and II in Futrono and III in San Juan de al Costa, Los Lagos, Chile.

 

 

AFRICA AND EUROPE

 

O: 20SEP2018 01:54:50  35.4N   23.4E mb=4.2  EMSC   CRETE, GREECE                

P: 17SEP2018 119777    35.0N   24.0E 3.0-4.6 BAAAA  Aegean Sea                 

 

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

 

SOUTHWEST PACIFIC

 

O: 20SEP2018 06:45:01   8.9S  158.3E mb=5.1  EMSC   SOLOMON ISLANDS              

O: 20SEP2018 06:13:58   9.0S  158.2E mb=4.9  EMSC   SOLOMON ISLANDS               

O: 20SEP2018 05:47:36   9.0S  158.3E Mw=5.7  EMSC   SOLOMON ISLANDS              

P: 17SEP2018 119728     9.0S  158.0E 4.0-5.6 BAAAA  Solomon Islands            

 

O: 19SEP2018 14:54:53  14.5S  167.9E mb=4.6  EMSC   VANUATU                      

P: 15SEP2018 119936    15.0S  168.0E 4.0-5.6 BAAAA  Vanuatu Islands            

 

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

 

No earthquakes of M>=4 were located in Japan or the Kuril Islands today.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 19SEP2018 07:13:54  32.1N  117.4W ML=2.1  EMSC   OFFSHORE BAJA CALIFORNIA, MEXI

P: 18SEP2018 119813    32.0N  117.4W 2.5-4.5 AAAAA  So. California             

 

O: 19SEP2018 21:55:11  33.3N  117.5W ML=2.1  EMSC   SOUTHERN CALIFORNIA          

P: 20SEP2018 119818    33.7N  117.5W 2.5-4.8 AAAAA  So. California             

 

O: 19SEP2018 23:56:35  33.5N  118.8W ML=2.1  EMSC   CHANNEL ISLANDS REG., CALIFORN

P: 21SEP2018 119817    33.9N  118.3W 2.5-4.6 AAAAA  So. California             

P: 22SEP2018 119817    33.6N  118.5W 2.5-4.5 BAAAA  So. California             

 

O: 19SEP2018 16:17:42  34.0N  119.0W ML=2.9  EMSC   CHANNEL ISLANDS REG., CALIFORN

P: 19SEP2018 119820    34.3N  118.5W 2.5-4.5 AAAAA  So. California             

 

NEIC reported this earthquake of M 2.9 in the Channel Islands, California was felt with intensity IV in West Hills, California and II-III in the area(s) of Malibu, Newbury Park, Westlake Village, Camarillo, Agoura Hills, Thousand Oaks, Calabasas, West Hills, Moorpark, Marina del Rey and Los Angeles, California.

 

O: 19SEP2018 21:41:14  36.0N  121.0W MD=2.3  EMSC   CENTRAL CALIFORNIA           

P: 20SEP2018 119807    35.8N  120.3W 2.5-4.5 AAAAA  Off So. California         

P: 22SEP2018 119782    36.1N  120.1W 2.5-4.4 BAAAA  Central California         

 

O: 19SEP2018 17:47:27  38.3N  121.9W MD=2.6  EMSC   NORTHERN CALIFORNIA          

P: 22SEP2018 119783    37.2N  122.1W 2.5-4.4 BBAAA  Central California         

 

O: 20SEP2018 00:48:46  38.8N  122.8W MD=2.1  EMSC   NORTHERN CALIFORNIA          

P: 20SEP2018 119785    38.7N  122.7W 2.5-4.4 AAAAA  Central California         

 

O: 19SEP2018 08:49:42  40.6N  124.1W MD=2.1  EMSC   NORTHERN CALIFORNIA          

O: 19SEP2018 07:28:24  40.6N  124.1W MD=2.7  EMSC   NORTHERN CALIFORNIA          

P: 20SEP2018 119865    40.3N  124.7W 2.5-4.6 AAAAA  Off Coast of No. Calif     

 

NEIC reported this earthquake of M 2.7 off northern California  was felt with intensity IV in Eureka and II-III in the area(s) of Fortuna, California.

 

ALASKA

 

O: 19SEP2018 22:12:42  69.5N  144.3W ML=3.9  EMSC   NORTHERN ALASKA              

O: 19SEP2018 20:09:39  69.5N  144.4W Ml=3.1  EMSC   NORTHERN ALASKA              

O: 19SEP2018 15:40:49  69.6N  145.2W ML=3.0  EMSC   NORTHERN ALASKA              

P: 18SEP2018 119911    69.4N  144.8W 3.0-4.9 AAAAA  Northern Alaska            

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 20SEP2018 06:36:12  46.0N  122.7W MD=2.0  EMSC   WASHINGTON                   

P: 17SEP2018 119880    46.9N  122.0W 2.0-4.0 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

 

No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.

 

HAWAII

 

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

 

MODERATELY STRONG QUAKE IN SOUTHERN SOLOMON ISLANDS

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 18, 2018

 

A moderately strong earthquake of M 5.8 hit the Solomon Islands today. NEIC reported it was felt with intensity VI in Gizo, Western Solomon Islands. This earthquake is the strongest in the southern Solomon Islands since an M 7.0 on November 18, 2015. Forecast 119728 had expected this event was likely in the Solomon Islands around September 18. This earthquake is located about 10 degrees south of the geomagnetic equator and may have been promoted by the past geomagnetic storm as noted in previous issues of this summary:

 

"This storm is likely to enhance seismicity at 10-15 degrees from the geomagnetic equator during the period September 17-18 and at high latitudes." (September 16-18. 2018)

 

O: 18SEP2018 11:57:51   8.3S  157.2E Mw=5.8  EMSC   SOLOMON ISLANDS              

P: 18SEP2018 119728     7.0S  156.0E 4.0-5.5 ABAAA  Solomon Islands            

 

The strongest earthquake in the U.S. or Canada today occurred in the aftershock region of Northern Alaska with M 4.9. It may have been felt in Fairbanks lightly. No earthquakes of M>=4.9 in this aftershock zone have occurred since the mainshocks of M 6.4 and 6.1 on August 12, 2018. Forecast 119911 had expected today's event within about 25 km of the epicenter was likely around September 18.

 

O: 18SEP2018 23:10:14  69.6N  144.2W ML=3.0  EMSC   NORTHERN ALASKA              

O: 18SEP2018 13:30:38  69.6N  144.2W Ml=3.0  EMSC   NORTHERN ALASKA              

O: 18SEP2018 12:41:01  69.6N  144.9W mb=4.9  EMSC   NORTHERN ALASKA              

P: 18SEP2018 119911    69.4N  144.8W 3.0-4.9 AAAAA  Northern Alaska            

 

An earthquake of M 4.4 also occurred in the Aleutian Islands today in the Near Islands region of Alaska. It was not reported felt in this remote area. This is the third largest event in the Near Islands in the past year - following quakes of M 4.9 on May 9, 2018 and M 4.6 on July 10, 2018. Forecast 119897 had expected this event was likely within about 75 km of this epicenter around September 17.

 

O: 18SEP2018 19:07:11  51.5N  174.3E mb=4.4  EMSC   NEAR ISLANDS, ALEUTIAN ISLANDS

P: 17SEP2018 119897    52.0N  175.0E 4.0-6.0 AAAAA  Rat Islands                

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: 19SEP2018 03:50:16  43.3N   82.5E mb=4.4  EMSC   NORTHERN XINJIANG, CHINA     

P: 17SEP2018 119851    42.0N   79.0E 4.0-5.4 ABBAA  Kirgizstan/Xinjiang        

 

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

 

INDONESIA AND PHILIPPINES

 

O: 18SEP2018 07:33:39   5.2N   96.2E ML=4.8  EMSC   NORTHERN SUMATRA, INDONESIA  

P: 18SEP2018 119709     3.0N   96.0E 4.0-5.8 ACAAA  Nicobar Islands            

 

O: 19SEP2018 00:17:38   6.6S  130.0E mb=4.2  EMSC   BANDA SEA                    

P: 17SEP2018 119733     6.0S  130.0E 4.0-5.6 AAAAA  West Irian, PNG            

 

O: 18SEP2018 09:25:28   7.5S  125.9E mb=5.2  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P: 17SEP2018 119717     9.0S  124.0E 4.0-5.5 ABBAA  Flores Island area         

 

O: 18SEP2018 18:45:06   8.3S  116.1E ML=4.3  EMSC   LOMBOK REGION, INDONESIA     

P: 15SEP2018 119725     9.0S  116.0E 4.0-5.6 BAAAA  So. of Bali                

 

NEIC reported this earthquake of M 4.7 in Lombok, Indonesia was felt with intensity II-III in the area(s) of Mararam, Indonesia.

 

CENTRAL AND SOUTH AMERICA

 

O: 19SEP2018 00:59:28  12.4N   87.1W mb=4.5  EMSC   NEAR COAST OF NICARAGUA      

P: 21SEP2018 119751    13.0N   87.0W 3.5-5.1 AAAAA  Nicaragua                  

 

O: 19SEP2018 02:55:02  14.5N   92.4W ML=4.2  EMSC   OFFSHORE CHIAPAS, MEXICO     

P: 16SEP2018 119743    15.0N   92.0W 3.5-5.3 BAAAA  Guatemala                  

 

O: 19SEP2018 04:41:43  15.4N   96.5W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO      

P: 22SEP2018 119739    15.0N   95.0W 3.5-5.1 BAAAA  Chiapas, Mexico            

 

O: 18SEP2018 20:14:14  18.1N   68.0W MD=3.0  EMSC   MONA PASSAGE, PUERTO RICO    

P: 18SEP2018 119756    18.0N   69.0W 3.4-5.2 AAAAA  Puerto Rico                

 

O: 18SEP2018 16:18:26  19.1N   64.8W MD=3.4  EMSC   VIRGIN ISLANDS REGION        

P: 16SEP2018 119761    20.0N   64.0W 3.0-4.4 AAAAA  Bahamas/No. Caribbean      

 

O: 18SEP2018 13:14:17  19.2N   67.7W MD=3.0  EMSC   PUERTO RICO REGION           

P: 18SEP2018 119756    18.0N   69.0W 3.4-5.2 ABBAA  Puerto Rico                

 

O: 18SEP2018 08:21:40  19.3N   65.2W MD=3.1  EMSC   PUERTO RICO REGION            

P: 16SEP2018 119746    18.0N   65.0W 3.0-5.1 ABAAA  Leeward Islands            

 

O: 18SEP2018 09:51:49  24.8N  109.7W ML=4.2  EMSC   GULF OF CALIFORNIA           

P: 19SEP2018 119765    24.0N  109.0W 3.5-5.2 AAAAA  Gulf of California         

 

 

O: 18SEP2018 23:50:09  30.9S   71.4W ML=4.1  EMSC   COQUIMBO, CHILE              

P: 18SEP2018 119954    30.0S   69.0W 4.0-5.5 AABAA  Coast Central Chile        

 

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

 

AFRICA AND EUROPE

 

O: 18SEP2018 23:37:07  12.8S   45.4E mb=4.7  EMSC   MAYOTTE REGION               

 

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

 

SOUTHWEST PACIFIC

 

O: 18SEP2018 11:57:51   8.3S  157.2E Mw=5.8  EMSC   SOLOMON ISLANDS              

P: 18SEP2018 119728     7.0S  156.0E 4.0-5.5 ABAAA  Solomon Islands            

 

O: 18SEP2018 23:44:08  18.2S  178.1W mb=4.4  EMSC   FIJI REGION                  

P: 16SEP2018 119933    18.0S  179.0W 4.0-5.5 AAAAA  Tonga Islands              

 

 

OCEAN RIDGES

 

O: 18SEP2018 10:57:49  37.8S   49.9E mb=4.9  EMSC   SOUTHWEST INDIAN RIDGE       

P: 17SEP2018 119959    34.0S   56.0E 4.0-5.7 ACCAA  So. Indian Ocean           

P: 17SEP2018 119964    41.0S   43.0E 4.0-5.4 ACCAA  So. Indian Ocean           

 

O: 18SEP2018 23:44:07  56.3S   27.3W mb=4.8  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 16SEP2018 119970    57.0S   26.0W 4.0-5.8 AAAAA  So. Sandwich Islands       

 

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

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 18SEP2018 20:58:25  28.0S  177.0W mb=4.9  EMSC   KERMADEC ISLANDS REGION      

O: 18SEP2018 20:58:25  28.0S  177.0W mb=4.9  EMSC   KERMADEC ISLANDS REGION      

P: 18SEP2018 119942    28.0S  176.0W 4.0-5.8 AAAAA  No. Kermadec Islands       

 

O: 18SEP2018 09:24:17  30.0S  177.7W mb=5.2  EMSC   KERMADEC ISLANDS, NEW ZEALAND

P: 17SEP2018 119956    30.0S  177.0W 4.0-5.5 AAAAA  No. Kermadec Islands       

 

O: 18SEP2018 01:36:22  38.0S  176.5E ML=4.6  GEONET Felt with light intensity

O: 18SEP2018 22:11:24  39.7S  174.0E mb=4.3  EMSC   OFF W. COAST OF N. ISLAND, N.Z

P: 17SEP2018 119957    39.0S  174.0E 3.0-4.4 AAAAA  North Island, N.Z.         

 

GEONET reported this earthquake of M 4.6 was felt with light intensity in the area of northern North Island,  New Zealand. 652 people reported feeling this earthquake with 485 of weak intensity and 161 with light intensity; 6 with moderate intensity; none strong shaking; none with severe and none with extreme intensity in North Island, New Zealand.

 

O: 19SEP2018 05:47:39  45.1S  167.5E ML=4.6  EMSC   SOUTH ISLAND OF NEW ZEALAND  

O: 19SEP2018 05:47:39  45.1S  167.5E MS=4.7  GEONET Felt with light intensity

P: 17SEP2018 119965    45.0S  167.0E 3.0-4.9 AAAAA  So. Island, N.Z.           

 

GEONET reported this earthquake was felt with light intensity in the area W of Te Anau, South Island, New Zealand. 44 reports of light to weak intensity came from the area of southern South Island, New Zealand, 37 of weak and 7 of light shaking and 0 with moderate and 0 with strong intensity.

 

JAPAN AND KURIL ISLANDS

 

O: 18SEP2018 16:54:28  35.7N  141.9E mb=4.7  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 17SEP2018 119805    35.0N  142.0E 4.0-5.6 AAAAA  Off East Coast Honshu      

 

O: 18SEP2018 08:11:11  36.0N  139.7E mb=4.6  EMSC   NEAR S. COAST OF HONSHU, JAPAN

P: 17SEP2018 119806    37.0N  141.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

O: 19SEP2018 00:01:37  36.7N  141.0E Mw=3.9  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 17SEP2018 119806    37.0N  141.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

NEIC reported this earthquake of M 3.9 in Eastern Honshu, Japan was felt with intensity II-III in the area(s) of Mito, Ibaraki, Japan.

 

O: 18SEP2018 16:21:48  38.5N  141.6E Mw=5.1  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 17SEP2018 119826    39.0N  143.0E 4.0-5.4 AAAAA  So. of Honshu              

 

NEIC reported this earthquake of M 5.1 off Eastern Honshu  was felt with intensity II-III in the area(s) of Miyagi at Sendai and Shiroishi, Japan.

An earlier earthquake of M 4.6 today was felt in eastern Honshu with intensity II-III in Saitama, Chiba, Ibaraki, Tokyo, Chiba, Gunma, Kanagawa, Tochigi, and Nagano, Japan.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 18SEP2018 16:31:07  32.1N  115.0W ML=2.2  EMSC   BAJA CALIFORNIA, MEXICO      

P: 22SEP2018 119814    32.9N  115.6W 2.5-4.6 BAAAA  So. California             

 

O: 19SEP2018 07:13:55  32.1N  117.3W ML=2.1  EMSC   OFFSHORE BAJA CALIFORNIA, MEXI

P: 18SEP2018 119813    32.0N  117.4W 2.5-4.5 AAAAA  So. California             

 

O: 18SEP2018 17:22:30  34.2N  116.9W ML=2.4  EMSC   SOUTHERN CALIFORNIA          

O: 18SEP2018 21:33:08  34.2N  116.9W ML=2.5  EMSC   SOUTHERN CALIFORNIA          

P: 21SEP2018 119819    33.9N  116.9W 2.5-4.6 BAAAA  So. California             

 

O: 18SEP2018 21:16:18  35.5N  115.5W ML=2.1  EMSC   SOUTHERN CALIFORNIA          

P: 20SEP2018 119821    34.9N  116.4W 2.5-4.8 AAAAA  So. California             

 

O: 19SEP2018 00:10:10  36.5N  121.1W MD=2.4  EMSC   CENTRAL CALIFORNIA           

P: 17SEP2018 119783    36.7N  121.4W 2.5-4.4 AAAAA  Central California         

 

O: 18SEP2018 15:09:35  38.8N  118.0W ML=2.4  EMSC   NEVADA                       

P: 18SEP2018 119781    38.6N  118.6W 2.5-4.5 AAAAA  California/Nevada area     

 

 

NEIC reported an earthquake of M 2.9 off northern California  was felt with intensity III-IV in the area(s) of Fortuna and Eureka, California.

 

ALASKA

 

O: 18SEP2018 19:07:11  51.5N  174.3E mb=4.4  EMSC   NEAR ISLANDS, ALEUTIAN ISLANDS

P: 17SEP2018 119897    52.0N  175.0E 4.0-6.0 AAAAA  Rat Islands                

 

O: 18SEP2018 14:49:08  56.2N  149.4W ML=3.8  EMSC   GULF OF ALASKA               

O: 19SEP2018 00:40:57  56.3N  149.1W ML=3.6  EMSC   GULF OF ALASKA               

 

O: 18SEP2018 23:10:14  69.6N  144.2W ML=3.0  EMSC   NORTHERN ALASKA              

O: 18SEP2018 13:30:38  69.6N  144.2W Ml=3.0  EMSC   NORTHERN ALASKA              

O: 18SEP2018 12:41:01  69.6N  144.9W mb=4.9  EMSC   NORTHERN ALASKA              

P: 18SEP2018 119911    69.4N  144.8W 3.0-4.9 AAAAA  Northern Alaska            

 

O: 17SEP2018 02:22:06  59.8N  136.6W ML=3.1  NRCA  105 km WNW of Haines          

P: 15SEP2018 119903    60.0N  138.0W 3.2-5.3 AAAAA  Central Alaska             

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 19SEP2018 00:21:28  46.4N  121.1W MD=2.4  EMSC   WASHINGTON                   

P: 17SEP2018 119880    46.9N  122.0W 2.0-4.0 AAAAA  Washington state, U.S.     

 

O: 17SEP2018 02:17:03  48.9N  129.4W ML=3.1  NRCA  249 km SW  of Pt. Hardy       

P: 17SEP2018 119879    48.9N  129.3W 2.8-5.3 AAAAA  Vancouver Island area      

 

ROCKY MOUNTAINS REGION

 

O: 18SEP2018 09:22:31  42.6N  111.2W ML=3.5  EMSC   SOUTHERN IDAHO               

P: 21SEP2018 119843    41.9N  108.7W 2.0-4.3 BACAA  Colorado area              

 

O: 18SEP2018 06:30:45  44.7N  113.8W ml=2.3  ANSS   ENE of Challis Idaho         

O: 18SEP2018 07:00:05  44.7N  113.9W ml=2.5  ANSS   NE of Challis Idaho          

P: 17SEP2018 119853    44.5N  112.6W 2.0-4.1 AAAAA  Montana/Idaho              

 

EASTERN U.S./CANADA

 

O: 19SEP2018 05:15:16  35.8N   97.3W mb=2.8  EMSC   OKLAHOMA                     

P: 18SEP2018 119830    36.0N   96.0W 2.0-4.1 AAAAA  Southern Plains            

 

NEIC reported this earthquake of M 2.8 in Oklahoma was felt with intensity II-III in the area(s) of Guthrie, Oklahoma.

 

O: 18SEP2018 13:49:09  36.5N   97.7W ML=2.4  EMSC   OKLAHOMA                     

P: 18SEP2018 119830    38.0N   97.0W 2.0-4.2 ABAAA  Southern Plains            

 

O: 18SEP2018 08:20:41  36.3N   89.5W md=1.2  ANSS   ENE of Ridgely Tennessee     

P: 19SEP2018 119798    36.3N   89.5W 2.0-3.9 AAAAA  New Madrid area            

 

O: 17SEP2018 16:53:28  49.7N   91.7W ML=1.8  NRCA  48 km S from Sioux Lookout    

 

HAWAII

 

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