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
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