STRONG QUAKES CONTINUE IN FIJI

 

EARTHQUAKE SUMMARY FOR SEPTEMBER 20, 2018

 

The strongest seismicity in the world today continued to occur in the southwest Pacific region. Earthquakes of M 5.8 and 5.9 occurred east of Suva Fiji in this continuing series which has followed events including an M 8.2 and M 7.8 on August 19 and September 6 in Fiji.  Forecasts 119933 and 119934 had expected today's activity could be large around September 18.

 

O: 21SEP2018 03:41:41  17.8S  180.0W Mw=5.9  EMSC   FIJI REGION                   

O: 21SEP2018 03:41:41  17.9S  179.9W mw=5.9  ANSS   E of Suva Fiji

O: 21SEP2018 03:40:39  17.9S  180.0E mw=5.8  ANSS   E of Suva Fiji

O: 21SEP2018 03:40:39  17.9S  180.0E Mw=5.8  EMSC   FIJI                         

O: 21SEP2018 06:49:22  18.0S  178.3W mb=4.2  EMSC   FIJI REGION                  

O: 20SEP2018 15:50:08  18.1S  178.4W mb=4.2  EMSC   FIJI REGION                  

P: 18SEP2018 119933    17.0S  179.0W 4.0-6.1 AAAAA  Tonga Islands              

P: 18SEP2018 119934    18.0S  180.0W 4.0-5.6 AAAAA  Tonga Islands              

 

An earthquake of M 5.4 in the area off the coast of Chiapas, Mexico was lightly felt in that area today. This may be related to stresses from Hurricane Florence while unloaded force over the area last week. Hurricanes in September are often followed by enhanced seismicity in eastern Mexico and Guatemala. The last  earthquake of M>=5.4 in Chiapas, Mexico within about 100 km of today's epicenter was an M 5.5 on April 11, 2018 and prior to that an M 5.4 on October 14, 2017. Today's event is an aftershock of the M 8.1 quake which hit the region on September 8, 2017 – the strongest within about 100 km of the mainshock since September, 2017. Forecasts 119738 and 119739 had expected today's Chiapas activity was likely around September 22.

 

O: 20SEP2018 17:13:56  15.4N   94.7W ML=4.2  EMSC   OFFSHORE OAXACA, MEXICO      

O: 20SEP2018 09:23:13  14.3N   93.9W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 20:51:13  14.3N   94.0W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 09:59:17  14.4N   93.9W ML=4.2  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 13:12:23  14.4N   94.0W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 09:57:42  14.5N   94.0W ML=4.4  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 09:21:18  14.7N   93.8W Mw=5.4  EMSC   OFF COAST OF CHIAPAS, MEXICO

P: 22SEP2018 119738    15.0N   93.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

P: 22SEP2018 119739    16.0N   94.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

An earthquake of M 3.4 was widely felt in eastern Los Angeles, California today. NEIC reported it was felt with intensity II-III in San Bernardino, Grand Terrace, Colton, Loma Linda, Rialto, Highland, Redlands, Fontana, Moreno Valley, Riverside, Running Springs, Rancho Cucamonga, Moreno Valley, Ontario, Yucaipa, Upland, Hesperia, Corona, Perris, Beaumont, Chino Hills, Victorville, Lake Elsinore, Sun City, Banning, San Jacinto, Menifee, and in general within about 75 km of the epicenter. This is the largest earthquake in eastern Los Angeles within about 50 km of this epicenter since an M 4.4 on August 29, 2018 about 50 km west of today's epicenter. Forecast 119818 had expected today's event was likely in this area around September 20.

 

O: 20SEP2018 12:44:34  34.1N  117.3W ML=3.4  EMSC   GREATER LOS ANGELES AREA, CALI

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

 

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, Today's event of M 5.4 occurred as Tropical Storm 28W passed over this epicenter. 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               

 

Seismicity in the aftershock zone of the M 6.4 in Northern Alaska of August 12, 2018 continued today. The strongest event in the U.S. or Canada today was an M 3.8 in the northern Alaska aftershocks zone. This follows an M 4.9 and 3.9 in the area in the past two days. Forecast 119911 had expected this activity was likely in the area around September 18.

 

O: 21SEP2018 02:19:38  69.5N  144.1W Ml=3.0  EMSC   NORTHERN ALASKA

O: 20SEP2018 09:27:59  69.5N  144.4W ML=3.8  EMSC   NORTHERN ALASKA

O: 20SEP2018 13:55:52  69.2N  146.7W ML=3.0  EMSC   NORTHERN ALASKA              

P: 18SEP2018 119911    69.4N  144.8W 3.0-4.9 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: 20SEP2018 15:41:26  17.9N   97.4E ML=4.1  EMSC   MYANMAR                      

P: 18SEP2018 119769    21.0N   95.0E 4.0-5.6 ACBAA  Myanmar                    

 

O: 20SEP2018 20:51:08  53.3N  160.4E mb=4.1  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 18SEP2018 119891    54.0N  158.0E 4.0-5.8 AABAA  Kamchatka                  

 

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

 

INDONESIA AND PHILIPPINES

 

O: 20SEP2018 16:36:52   5.8S  132.1E mb=4.2  EMSC   KEPULAUAN KAI, INDONESIA     

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

 

O: 20SEP2018 04:55:36  17.0N  145.6E mb=5.4  EMSC   ALAMAGAN REG, N. MARIANA ISLAN

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

P: 18SEP2018 119752    19.0N  146.0E 4.0-5.4 ABAAA  No. Marianas               

 

O: 20SEP2018 17:01:06  10.9S  124.0E mb=4.5  EMSC   TIMOR REGION, INDONESIA      

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

 

O: 20SEP2018 14:08:00  11.0N  122.2E ML=4.0  EMSC   PANAY, PHILIPPINES           

P: 17SEP2018 119747    14.0N  125.0E 3.5-4.9 BCCAA  Luzon, Philippines         

 

CENTRAL AND SOUTH AMERICA

 

O: 20SEP2018 17:54:35   0.8S   80.2W ML=4.6  EMSC   NEAR COAST OF ECUADOR        

P: 22SEP2018 119716     1.0S   81.0W 4.0-5.4 AAAAA  Ecuador                    

 

O: 20SEP2018 22:45:16   2.2S   77.3W ML=4.1  EMSC   PERU-ECUADOR BORDER REGION   

P: 22SEP2018 119716     2.0S   78.0W 4.0-5.7 AAAAA  Ecuador                    

 

O: 20SEP2018 23:55:30   9.0N   82.7W ML=4.0  EMSC   NAMA-COSTA RICA BORDER REGION

P: 22SEP2018 119705     8.0N   83.0W 3.5-5.2 AAAAA  Costa Rica                 

 

O: 20SEP2018 22:30:16  14.9N   93.7W mb=4.5  EMSC   OFFSHORE CHIAPAS, MEXICO     

P: 22SEP2018 119738    15.0N   93.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

NEIC reported this earthquake of M 4.5 in Central Peru was felt with intensity II-III in the area(s) of Nazca, Ica, Peru.

 

O: 20SEP2018 08:45:17  14.9S   75.8W mb=4.5  EMSC   NEAR COAST OF CENTRAL PERU   

P: 22SEP2018 119923    14.0S   73.0W 4.0-5.7 AACAA  Central Peru               

 

O: 21SEP2018 03:27:43  15.3N   95.3W ML=4.6  EMSC   OFFSHORE OAXACA, MEXICO      

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

 

O: 20SEP2018 17:13:56  15.4N   94.7W ML=4.2  EMSC   OFFSHORE OAXACA, MEXICO      

O: 20SEP2018 09:23:13  14.3N   93.9W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 20:51:13  14.3N   94.0W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 09:59:17  14.4N   93.9W ML=4.2  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 13:12:23  14.4N   94.0W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 09:57:42  14.5N   94.0W ML=4.4  EMSC   OFF COAST OF CHIAPAS, MEXICO

O: 20SEP2018 09:21:18  14.7N   93.8W Mw=5.4  EMSC   OFF COAST OF CHIAPAS, MEXICO

P: 22SEP2018 119738    15.0N   93.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

P: 22SEP2018 119739    16.0N   94.0W 3.5-5.1 AAAAA  Chiapas, Mexico            

 

O: 20SEP2018 13:05:15  18.1N   68.5W MD=3.3  EMSC   MONA PASSAGE, DOMINICAN REPUBL

P: 22SEP2018 119762    20.0N   68.0W 3.0-4.6 ABAAA  Bahamas/No. Caribbean      

 

O: 20SEP2018 14:57:13  18.8N   64.8W MD=3.4  EMSC   VIRGIN ISLANDS REGION        

P: 20SEP2018 119746    18.0N   64.0W 3.0-5.2 AAAAA  Leeward Islands            

 

O: 20SEP2018 15:02:50  19.4N   68.3W MD=3.1  EMSC   DOMINICAN REPUBLIC REGION    

O: 20SEP2018 14:01:33  19.4N   68.3W MD=3.2  EMSC   DOMINICAN REPUBLIC REGION    

P: 22SEP2018 119762    20.0N   68.0W 3.0-4.6 AAAAA  Bahamas/No. Caribbean      

 

O: 20SEP2018 17:33:55  29.8S   67.9W ML=4.0  EMSC   LA RIOJA, ARGENTINA          

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

 

O: 20SEP2018 06:35:23  30.3N  114.4W ML=3.9  EMSC   GULF OF CALIFORNIA           

P: 21SEP2018 119809    30.2N  114.1W 2.0-4.0 AAAAA  SW U.S.A                   

 

O: 20SEP2018 13:35:49  32.1N  116.1W ML=2.3  EMSC   BAJA CALIFORNIA, MEXICO      

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

 

 

AFRICA AND EUROPE

 

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

 

SOUTHWEST PACIFIC

 

O: 20SEP2018 07:05:26   6.5S  152.7E mb=5.4  EMSC   NEW BRITAIN REGION, P.N.G.   

P: 16SEP2018 119720     7.0S  152.0E 4.0-5.4 BAAAA  New Britain                

 

O: 20SEP2018 15:23:36   7.7S  154.6E mb=4.7  EMSC   BOUGAINVILLE REGION, P.N.G.  

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

 

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

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

 

O: 21SEP2018 00:25:41  16.0S  168.2E mb=4.9  EMSC   VANUATU                       

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

 

O: 20SEP2018 23:56:12  22.1S  169.6E mb=4.4  EMSC   SOUTHEAST OF LOYALTY ISLANDS 

P: 17SEP2018 119941    22.0S  171.0E 4.0-5.6 BAAAA  Loyalty Islands             

 

O: 21SEP2018 03:41:41  17.8S  180.0W Mw=5.9  EMSC   FIJI REGION                  

O: 21SEP2018 03:41:41  17.9S  179.9W mw=5.9  ANSS   E of Suva Fiji

O: 21SEP2018 03:40:39  17.9S  180.0E mw=5.8  ANSS   E of Suva Fiji

O: 21SEP2018 03:40:39  17.9S  180.0E Mw=5.8  EMSC   FIJI                         

O: 21SEP2018 06:49:22  18.0S  178.3W mb=4.2  EMSC   FIJI REGION                  

O: 20SEP2018 15:50:08  18.1S  178.4W mb=4.2  EMSC   FIJI REGION                  

P: 18SEP2018 119933    17.0S  179.0W 4.0-6.1 AAAAA  Tonga Islands              

P: 18SEP2018 119934    18.0S  180.0W 4.0-5.6 AAAAA  Tonga Islands              

 

 

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

 

OCEAN RIDGES

 

O: 20SEP2018 14:04:37  34.7S   16.2W mb=5.1  EMSC   SOUTHERN MID-ATLANTIC RIDGE  

 

 

ZEALANDIA AND AUSTRALIA REGION

 

O: 20SEP2018 13:44:20  34.3S  179.0W mb=4.7  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 17SEP2018 119961    33.0S  179.0W 4.0-5.6 BBAAA  So. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O: 20SEP2018 14:57:27  26.7N  129.7E mb=4.6  EMSC   RYUKYU ISLANDS, JAPAN        

O: 20SEP2018 23:06:02  26.7N  129.7E mb=4.6  EMSC   RYUKYU ISLANDS, JAPAN        

P: 18SEP2018 119773    25.0N  127.0E 4.0-5.5 ABBAA  Ryukyu Islands             

 

O: 20SEP2018 07:44:25  39.9N  143.2E mb=4.6  EMSC   OFF EAST COAST OF HONSHU, JAPA

O: 20SEP2018 08:08:06  39.9N  143.4E mb=4.7  EMSC   OFF EAST COAST OF HONSHU, JAPA

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

 

O: 20SEP2018 22:56:09  42.7N  142.1E mb=4.2  EMSC   HOKKAIDO, JAPAN REGION       

P: 19SEP2018 119846    43.0N  142.0E 3.5-5.4 AAAAA  Hokkaido, Japan            

 

O: 21SEP2018 03:31:55  50.6N  155.8E mb=4.6  EMSC   KURIL ISLANDS                 

P: 18SEP2018 119856    49.0N  156.0E 3.5-5.5 BBAAA  NE Pacific                 

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 20SEP2018 12:44:34  34.1N  117.3W ML=3.4  EMSC   GREATER LOS ANGELES AREA, CALI

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

 

O: 20SEP2018 21:27:19  35.8N  121.1W MD=2.3  EMSC   CENTRAL CALIFORNIA           

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

 

O: 20SEP2018 16:27:15  36.0N  121.0W MD=2.0  EMSC   CENTRAL CALIFORNIA           

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

 

O: 20SEP2018 22:23:05  36.6N  121.2W MD=2.2  EMSC   CENTRAL CALIFORNIA           

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

 

O: 21SEP2018 00:48:12  36.9N  116.0W ML=2.1  EMSC   NEVADA                       

P: 22SEP2018 119780    37.8N  115.8W 2.5-4.6 AAAAA  California/Nevada area     

 

O: 21SEP2018 06:29:58  36.9N  120.8W MD=2.2  EMSC   CENTRAL CALIFORNIA           

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

 

O: 21SEP2018 02:13:59  38.5N  122.7W MD=2.3  EMSC   NORTHERN CALIFORNIA          

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

 

O: 20SEP2018 09:45:52  41.1N  116.3W ML=2.1  EMSC   NEVADA                       

P: 21SEP2018 119841    41.3N  118.7W 2.5-4.4 AABAA  California/Nevada area     

 

 

ALASKA

 

O: 21SEP2018 03:31:48  62.0N  149.9W Ml=3.5  EMSC   CENTRAL ALASKA               

O: 20SEP2018 18:42:46  63.3N  149.6W ML=3.7  EMSC   CENTRAL ALASKA               

P: 18SEP2018 119908    62.7N  150.6W 3.2-5.3 AAAAA  Central Alaska             

 

NEIC reported this earthquake of M 3.5 in Central Alaska was felt with intensity II-III in the area(s) of Talkeetna, Willow, Chugiak and Matanuska-Sustina Border, Alaska.

 

O: 21SEP2018 02:19:38  69.5N  144.1W Ml=3.0  EMSC   NORTHERN ALASKA

O: 20SEP2018 09:27:59  69.5N  144.4W ML=3.8  EMSC   NORTHERN ALASKA

O: 20SEP2018 13:55:52  69.2N  146.7W 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: 20SEP2018 119871    45.3N  121.7W 2.0-3.9 AAAAA  Oregon state, U.S.         

 

O: 20SEP2018 16:03:25  50.0N  130.1W ML=3.0  NRCA  207 km WSW of Pt. Hardy       

P: 20SEP2018 119888    50.0N  128.0W 3.0-5.3 AABAA  British Colombia            

 

ROCKY MOUNTAINS REGION

 

O: 20SEP2018 11:38:14  37.2N  104.5W mb=2.5  EMSC   COLORADO                     

P: 21SEP2018 119788    37.0N  105.2W 2.0-4.1 AAAAA  Colorado area              

 

NEIC reported this earthquake of M 2.5 in Colorado was felt with intensity II-III in the area(s) of Trinidad, Colorado.

 

EASTERN U.S./CANADA

 

O: 20SEP2018 06:44:24  38.2N   89.3W MD=2.3  EMSC   ILLINOIS                     

P: 16SEP2018 119799    38.0N   87.0W 2.0-4.3 BABAA  New Madrid area            

P: 20SEP2018 119798    37.0N   89.0W 2.0-4.0 ABAAA  New Madrid area            

 

O: 20SEP2018 05:11:38  36.0N   89.9W MD=2.3  EMSC   ARKANSAS                     

O: 20SEP2018 09:20:32  36.5N   89.6W md=1.1  ANSS   SSW of Lilbourn Missouri

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

 

O: 20SEP2018 12:39:10  35.2N   84.5W md=1.8  ANSS   S of Etowah Tennessee        

P: 17SEP2018 119791    35.0N   84.0W 2.0-4.0 BAAAA  Kentucky/Tennessee/NC      

 

O: 19SEP2018 16:07:54  45.2N   67.7W ML=2.1  NRCA  29 km W from St. Stephen      

P: 18SEP2018 119844    46.0N   66.0W 2.0-4.1 AABAA  E. of Maine                

 

HAWAII

 

O: 21SEP2018 03:09:39  19.4N  155.6W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII     

P: 18SEP2018 119745    19.2N  155.3W 3.0-4.7 BAAAA  Hawaii