CURRENT QUIET CONTINUES - DEPTH MAY BE IMPORTANT FACTOR
EARTHQUAKE SUMMARY FOR MARCH 26, 2023
The current seismic quiet period continued today. During this period which began late on March 22, there have been 9 earthquakes in the world of M>=5.3 and none of M>=6. Five of these have occurred at deep or intermediate focal depths include an M 5.4 in Antofagasta, Chile, an M 5.6 in Fiji, an M 5.7 in Papua and two in Argentina of M 5.3 and 6.5. A strong series of moderate to large earthquake occurred beginning on March 21, 2023 and include 11 events in the next two days of M>=5.3. The dominance of deep and intermediate focus earthquakes since mid-March 22 suggests that whatever triggered the seiemicity on March 21-22 did not effectively extend to deeper focal depths. Since the beginning of 2022, there have been 146 earthquake at deep or intermediate focus (>100 km depth) and 787 of depth shallower than 100 km - a ratio of 0.18 or about 1 in every five earthquakes of this magnitude occur at depths greater than 100 km. The current ratio near 0.5 suggest an anomaly and could be used to examine triggering mechanisms. The depth of an earthquake is important in mitigating seismic hazard as deeper focus event have far less effects on the surface than shallow earthquake. Deeper focus events also tend to occur only in subduction zones and not in areas of horizontal displacement. The end of the current quiet period will probably occur with a series of strong solar flares and show up as a moderately large earthquake near 100 km depth.
The strongest earthquake in the world today and the only event of M>=5.1 was an M 5.5 in the Fiji Islands. It occurred at a deep focus of 459 km and was consistent with the hypothesis that these deep focus events have not been significantly affected by the current seismic quiet period. This earthquake occurred near local solar noon and was probably promoted by strong tidal stresses which maximize near this hour. This is the strongest earthquake within about 150 km of this epicenter since an M 5.6 on August 2, 2022 and an M 5.7 on December 17, 2021. Forecast 151925 had expected the region within about 100 km of this epicenter would show seismic enhancement around March 24. This epicenter is located at 103 degrees from the M 6.8 in Argentina of January 20, 2023 and other strong quakes near this in the past week and was probably promoted by energy from those sources.
O: 27MAR2023 02:29:21 17.9S 178.2W Mw=5.5 EMSC FIJI REGION
P: 24MAR2023 151925 17.0S 178.0W 4.0-5.4 BAAAA Tonga Islands
An M 4.6-4.9 occurred today in the Cook Strait, New Zealand. This earthquake occurred within minutes of local solar noon and was probably promoted by strong tidal stresses which maximize near this hour. GEONET reported this earthquake was felt with moderate to strong intensity in the area southeast of Wellington, New Zealand and in southern North Island and northern South Island. 2749 reports of felt events were made of which 1935 reported weak and 786 light intensity with 54 report of moderate shaking and 4 with strong and 0 severe and 2 with extreme intensity came from the area. NEIC reported this earthquake of M 4.6 in Cook Strait New Zealand was felt with intensity II-III in the area(s) of Cook Strait New Zealand in Wanganui, Feilding, Kapiti, Palmerston North, Lower Hutt, Wellington and Nelson. The last earthquake in the Cook Strait with M>=4.9 was an M 5.7 on February 15, 2023. This is probably an aftershock of that event. At the time this summary noted in this regard:
"Today's earthquake in the Cook Strait is the strongest in this region south of Wellington, New Zealand since an M 6.2 on January 20, 2014 about 150 km east of today's epicenter. Earthquakes about 150 km to the south of this occurred with M 6.4-6.5 in South Island on July 21 and August 16, 2013, the only such events in the region of Cook Strait in the past 35 years." (February 15, 2023)
Forecast 151954 had expected today's event in New Zealand was likely within about 50 km of this epicenter around March 27. This epicenter is located at the
third node (120 degrees) from the M 7.2 in Tajikistan of February 23, 2023 and at 101 degrees from the M 6.7 in Ecuador of March 18, 2023 and may have been promoted by energy from that source.
O: 27MAR2023 00:42:15 40.2S 174.4E MS=4.9 GEONET Cook Strait, New Zealand
O: 27MAR2023 00:42:14 40.2S 174.5E mb=4.6 EMSC COOK STRAIT, NEW ZEALAND
P: 27MAR2023 151954 40.0S 174.0E 3.0-4.4 AAAAA North Island, N.Z.
The Strongest earthquake in the U.S. or Canada today was an M 4.7 south of the western Andreanof Islands, Aleutians, Alaska. It was not reported felt in this remote area. The last earthquake within about 100 km of this epicenter south of the Aleutians was an M 5.4 on September 9, 2019. Most events in this area occur more than 100 km to the north of today's epicenter. Forecast 151872 had expected enhanced activity to the northeast of this epicenter was likely around March 27. This activity is at the fifth node (72 degrees) from the M 7.2 in Tajikistan of February 23, 2023 and may have been promoted by energy from that source.
O: 27MAR2023 05:25:19 50.0N 178.7W mb=4.7 EMSC SOUTH OF ALEUTIAN ISLANDS
P: 27MAR2023 151872 51.7N 176.4W 3.5-5.1 ABBAA Andreanoff Isls, Aleutians
An earthquake of M 4.4 also occurred today in the area of Loi'hi Seamount south of Hawaii. It was accompanied by several light foreshocks and aftershocks. The Loi'hi Seamount is an incipient volcanic area precipitated by the Hawaiian hot spot as the Pacific plate moves over that plume. The last earthquakes of M>=4.4 in the Loi'hi area were an M 4.6 on July 27, 2022; an M 4.9 on December 24, 2021 and an M 6.2 on October 10, 2021. At that time this summary noted:
"A strong earthquake of M 6.2 shook most of the state of Hawaii, U.S. today. …There have been only two earthquakes in Hawaii with M>=6.2 in the past 30 years – both north of today's epicenter in central and northern Hawaii Island - on May 4, 2018 with M 6.9 and as an M 6.7 on October 15, 2006. Today's earthquake occurred near the Loi'hi Seamount south of Hawaii and is not directly associated with the current major eruption of Kilauea volcano to the north. The shaking caused some doors to open and some items to be thrown from shelves in businesses. No major damage or casualties were reported and a tsunami does not appear to have been generated with this earthquake. The earthquake occurred within minutes of the maximum of a geomagnetic storm at local solar noon and was probably promoted by high tidal stresses associated with the new moon" (October 10, 2021)
Forecast 151723 had expected enhanced seismicity in Hawaii near this epicenter was likely around March 27.
NEIC reported this earthquake of M 4.1-4.4 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Naalehu and Pahoa. This activity is at the seventh node (52-53 degrees) from recent earthquakes in the Solomon Islands of M 7.0 of November 22, 2022 and from the Kermadec Islands M 7.0 of March 16, 2023 and may have been promoted by energy from those sources.
O: 26MAR2023 20:36:26 18.9N 155.2W ML=3.4 EMSC HAWAII REGION, HAWAII
O: 27MAR2023 01:59:11 18.9N 155.2W ML=3.2 EMSC HAWAII REGION, HAWAII
O: 27MAR2023 04:39:15 18.8N 155.2W ML=4.4 EMSC HAWAII REGION, HAWAII
P: 27MAR2023 151723 19.2N 155.2W 3.0-4.7 AAAAA Hawaii
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: 26MAR2023 23:23:29 36.4N 70.1E mb=4.2 EMSC HINDU KUSH REGION, AFGHANISTAN
O: 26MAR2023 13:14:32 36.5N 71.4E mb=4.4 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 27MAR2023 151779 36.0N 71.0E 3.8-5.4 AAAAA Hindu Kush/Pakistan
INDONESIA AND PHILIPPINES
O: 27MAR2023 04:57:23 3.9S 133.6E ML=4.1 EMSC PAPUA, INDONESIA
O: 26MAR2023 09:40:04 3.8S 134.9E ML=4.1 EMSC PAPUA, INDONESIA
P: 22MAR2023 151712 4.0S 135.0E 4.0-5.8 BAAAA West Irian, PNG
O: 26MAR2023 15:53:42 4.1N 126.4E ML=4.4 EMSC KEPULAUAN TALAUD, INDONESIA
P: 23MAR2023 151686 5.0N 126.0E 4.0-5.6 BAAAA Mindanao, Philippines
P: 28MAR2023 151686 4.0N 125.0E 4.0-5.6 AABAA Mindanao, Philippines
O: 26MAR2023 12:41:12 4.9S 132.0E mb=5.0 EMSC BANDA SEA
P: 25MAR2023 151713 5.0S 130.0E 4.0-5.4 AABAA West Irian, PNG
O: 27MAR2023 00:44:51 5.5N 125.8E mb=4.6 EMSC MINDANAO, PHILIPPINES
P: 26MAR2023 151686 6.0N 125.0E 4.0-5.5 AAAAA Mindanao, Philippines
O: 27MAR2023 02:56:06 5.6S 146.9E mb=4.6 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 27MAR2023 151701 6.0S 146.0E 4.0-5.4 AAAAA New Ireland
O: 26MAR2023 18:22:29 6.3S 104.3E ML=4.2 EMSC SUNDA STRAIT, INDONESIA
P: 28MAR2023 151708 6.0S 103.0E 4.0-5.4 AABAA So. of Sumatera
P: 31MAR2023 151708 6.0S 104.0E 4.0-5.5 BAAAA So. of Sumatera
O: 27MAR2023 00:36:57 7.1S 129.7E mb=4.4 EMSC KEPULAUAN BABAR, INDONESIA
P: 30MAR2023 151691 8.0S 129.0E 4.0-5.4 BAAAA Banda Sea
O: 26MAR2023 10:43:45 7.5S 130.3E mb=4.9 EMSC KEP. TANIMBAR REGION, INDONESIA
O: 26MAR2023 18:39:55 7.4S 130.2E Mw=4.9 EMSC KEP. TANIMBAR REGION, INDONESI
P: 31MAR2023 151713 6.0S 130.0E 4.0-5.6 BBAAA West Irian, PNG
O: 26MAR2023 23:07:16 7.9S 128.0E ML=4.1 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 30MAR2023 151691 8.0S 129.0E 4.0-5.4 BAAAA Banda Sea
O: 26MAR2023 21:46:54 10.8S 113.2E ML=4.4 EMSC SOUTH OF JAVA, INDONESIA
P: 21MAR2023 151706 9.0S 114.0E 4.0-5.6 BBAAA So. of Bali
O: 26MAR2023 12:38:17 17.5N 120.8E mb=4.6 EMSC LUZON, PHILIPPINES
P: 21MAR2023 151728 17.0N 120.0E 3.5-4.9 BAAAA Luzon, Philippines
CENTRAL AND SOUTH AMERICA
O: 26MAR2023 23:00:41 6.9N 73.1W mb=4.4 EMSC NORTHERN COLOMBIA
P: 28MAR2023 151679 7.0N 73.0W 4.0-5.4 AAAAA Colombia
O: 26MAR2023 14:24:30 10.3N 84.3W ML=4.5 EMSC COSTA RICA
P: 25MAR2023 151716 10.0N 84.0W 3.5-5.5 AAAAA Caribbean Sea
O: 26MAR2023 22:17:11 16.4S 74.3W ML=4.7 EMSC NEAR COAST OF SOUTHERN PERU
P: 26MAR2023 151918 16.0S 73.0W 4.0-5.8 AABAA So. Peru/Bolivia
O: 26MAR2023 13:59:49 17.9N 95.8W ML=4.0 EMSC VERACRUZ, MEXICO
P: 29MAR2023 151719 17.0N 95.0W 3.5-5.3 BAAAA Chiapas, Mexico
O: 26MAR2023 23:53:46 18.1N 103.3W ML=4.1 EMSC OFFSHORE MICHOACAN, MEXICO
P: 27MAR2023 151731 18.0N 104.0W 3.5-5.5 AAAAA Michoacan, Mexico
O: 26MAR2023 17:58:11 18.8N 101.7W mb=4.2 EMSC MICHOACAN, MEXICO
P: 23MAR2023 151730 18.0N 101.0W 3.5-5.6 BAAAA Michoacan, Mexico
O: 27MAR2023 03:29:06 19.0N 65.0W Md=3.3 EMSC VIRGIN ISLANDS REGION
P: 29MAR2023 151725 19.0N 65.0W 3.0-5.3 AAAAA Leeward Islands
O: 26MAR2023 10:12:20 19.2N 67.8W Md=3.5 EMSC DOMINICAN REPUBLIC REGION
O: 26MAR2023 08:38:38 19.1N 67.9W Md=3.8 EMSC DOMINICAN REPUBLIC REGION
P: 24MAR2023 151744 20.0N 69.0W 3.0-4.9 AAAAA Bahamas/No. Caribbean
O: 27MAR2023 04:22:17 24.3S 67.3W mb=4.1 EMSC SALTA, ARGENTINA
P: 22MAR2023 151930 24.0S 66.0W 4.0-5.9 BAAAA Argentina
O: 26MAR2023 11:39:01 25.7S 69.1W Mw=4.9 EMSC ATACAMA, CHILE
P: 23MAR2023 151931 27.0S 71.0W 4.0-5.7 BBBAA Coast Central Chile
O: 26MAR2023 17:26:41 36.5S 72.7W Mw=4.7 EMSC BIO-BIO, CHILE
P: 24MAR2023 151947 37.0S 70.0W 4.0-5.6 AABAA Central Chile
NEIC reported this earthquake of M 4.7 in Bio-Bio, Chile was felt with intensity II-III in the area(s) of Bio-Bio, Chile in Concepcion (IV), Penco, Chiguayante, Cabrero and in Angol, Araucania.
AFRICA AND EUROPE
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 27MAR2023 02:29:21 17.9S 178.2W Mw=5.5 EMSC FIJI REGION
P: 24MAR2023 151925 17.0S 178.0W 4.0-5.4 BAAAA Tonga Islands
O: 27MAR2023 02:53:46 22.8S 171.7E mb=5.0 EMSC SOUTHEAST OF LOYALTY ISLANDS
P: 23MAR2023 151933 22.0S 172.0E 4.0-5.8 BAAAA Loyalty Islands
O: 27MAR2023 02:42:37 26.2S 178.5E mb=4.5 EMSC SOUTH OF FIJI ISLANDS
P: 20MAR2023 151653 25.0S 179.0E 4.0-5.4 CBAAA Tonga/Fiji
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
O: 27MAR2023 00:42:15 40.2S 174.4E MS=4.9 GEONET Cook Strait, New Zealand
O: 27MAR2023 00:42:14 40.2S 174.5E mb=4.6 EMSC COOK STRAIT, NEW ZEALAND
P: 27MAR2023 151954 40.0S 174.0E 3.0-4.4 AAAAA North Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 26MAR2023 14:33:04 38.4N 141.6E mb=4.5 EMSC NEAR EAST COAST OF HONSHU, JAPAN
O: 26MAR2023 15:04:20 38.3N 141.6E Mw=4.9 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 26MAR2023 151833 40.0N 142.0E 3.5-5.4 ABAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 26MAR2023 09:22:21 30.8N 114.2W ML=3.5 EMSC GULF OF CALIFORNIA
P: 26MAR2023 151799 30.2N 114.4W 2.0-4.4 AAAAA SW U.S.A
O: 26MAR2023 23:12:30 32.6N 115.2W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO
P: 21MAR2023 151803 32.4N 115.8W 2.5-4.8 BAAAA So. California
O: 26MAR2023 21:06:43 33.6N 116.8W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 26MAR2023 151804 33.4N 116.7W 2.5-4.6 AAAAA So. California
O: 26MAR2023 14:14:49 36.0N 121.0W Md=2.1 EMSC CENTRAL CALIFORNIA
O: 26MAR2023 11:24:30 36.2N 120.8W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 27MAR2023 151767 36.4N 121.0W 2.5-4.7 AAAAA Central California
O: 27MAR2023 01:50:35 37.1N 121.5W Md=2.4 EMSC NORTHERN CALIFORNIA
P: 25MAR2023 151770 37.3N 121.6W 2.5-4.6 AAAAA Central California
O: 27MAR2023 00:03:31 37.9N 122.1W Md=2.3 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 24MAR2023 151770 38.0N 122.3W 2.5-4.6 BAAAA Central California
ALASKA
O: 27MAR2023 05:25:19 50.0N 178.7W mb=4.7 EMSC SOUTH OF ALEUTIAN ISLANDS
P: 27MAR2023 151872 51.7N 176.4W 3.5-5.1 ABBAA Andreanoff Isls, Aleutians
O: 27MAR2023 04:50:00 53.6N 170.6W mb=4.2 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 28MAR2023 151879 52.5N 169.2W 3.5-5.0 AAAAA Fox Islands, Aleutians
O: 26MAR2023 16:10:03 60.3N 151.5W mb=4.0 EMSC KENAI PENINSULA, ALASKA
O: 26MAR2023 16:10:03 60.3N 151.5W mb=3.6 ANSS KENAI PENINSULA, ALASKA
P: 27MAR2023 151893 61.1N 150.2W 3.2-4.9 AAAAA Central Alaska
NEIC reported this earthquake of M 3.6-4.0 in Kenai, Alaska was felt with intensity II-III in the area(s) of Kenai, Alaska in Kasilof, Soldotna, Ninilchik, Anchor Point, Kenai, Homer, Seward and Eagle River.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 27MAR2023 04:53:13 43.4N 126.9W mb=4.0 EMSC OFF COAST OF OREGON
P: 28MAR2023 151853 41.8N 126.9W 2.5-4.4 ABAAA Off Coast of No. Calif
NEIC reported this earthquake of M 4.0 off the coast of Oregon was felt with intensity II-III in the area(s) of Oregon in Langlois.
ROCKY MOUNTAINS REGION
O: 26MAR2023 07:11:27 31.6N 104.4W ML=3.3 EMSC WESTERN TEXAS
P: 24MAR2023 151800 31.5N 103.6W 2.0-3.9 AAAAA SW U.S.A
P: 29MAR2023 151800 32.5N 104.6W 2.0-3.9 BAAAA SW U.S.A
O: 27MAR2023 01:55:01 32.0N 103.8W ML=3.4 EMSC NEW MEXICO
P: 24MAR2023 151800 31.5N 103.6W 2.0-3.9 BAAAA SW U.S.A
P: 29MAR2023 151800 32.5N 104.6W 2.0-3.9 AAAAA SW U.S.A
NEIC reported this earthquake of M 3.4 in New Mexico was felt with intensity II-III in the area(s) of New Mexico in Loving.
EASTERN U.S./CANADA
No earthquakes of M>=1 were located in the Eastern U.S. or Canada today.
HAWAII
O: 26MAR2023 20:36:26 18.9N 155.2W ML=3.4 EMSC HAWAII REGION, HAWAII
O: 27MAR2023 01:59:11 18.9N 155.2W ML=3.2 EMSC HAWAII REGION, HAWAII
O: 27MAR2023 04:39:15 18.8N 155.2W ML=4.4 EMSC HAWAII REGION, HAWAII
P: 27MAR2023 151723 19.2N 155.2W 3.0-4.7 AAAAA Hawaii
MODERATE QUAKE SHAKES ATACAMA, CHILE
EARTHQUAKE SUMMARY FOR MARCH 25, 2023
Once again there was only one earthquake in the world today with M>5.0. This
continues the major quiet period of the past three days. The strongest earthquake in the world today was an M 5.4 in northern Chile. NEIC reported it was felt with intensity II-III in Calama, Antofagasta and in Iquique, Tarapaca, Chile. A foreshock of M 4.6 was felt with intensity II in Diego de Almagro, Atacama, Chile. Today's M 5.4 is the strongest earthquake in the region of Antofagasta, Chile since an M 5.6 on December 10, 2022. At the time this summary noted:
"The strongest earthquake in the world today was an M 5.6 in Antofagasta, Chile. NEIC reported maximum intensity IV in Calama, Antofagasta and II-III in Iquique, Tarapaca and in Valparaiso in Vina del Mar and San Antonio, Chile. This earthquake was accompanied by the eruption of the Lascar Volcano in Antofagasta, Chile. This eruption involved smoke, ash and lava and is a major eruption of this volcano. Lascar is located at 23.37S 67.73W in Antofagasta and is the most active of the volcanoes in the northern Andes of Chile. Chile's National Geology and Mining Service reported the eruption began within minutes of local solar noon (12:36 pm) and may have been triggered by high tidal stresses with the full moon which maximize near this hour. Ash reached heights of 6000 meters above the volcano. While no damage has been reported, air traffic has been alerted to the ash plume and evacuations may eventually be required. The last major eruption of Lascar was in 1993 but minor eruptive cycles occurred in 2006 and 2015. Other areas of Chile which might see enhanced volcanism at this time are the Villarrica volcano and Nevados de Chillan.
The earthquake of M 5.6 is the strongest within about 200 km of this epicenter in Antofagasta, Chile since an M 6.2 on July 27, 2022 and an M 5.7 on April 20, 2022. These may be aftershocks of an M 6.8 that hit near this on June 3, 2020." (December 10, 2022)
Forecast 151932 had expected today's M 5.4 was likely within about 100 km around March 27. Today's epicenter is at 143 degrees from the M 7.2 in Tajikistan of February 23, 2023 and from the M 7.6 of January 9 in the Banda Sea and may have been promoted by energy from those sources.
O: 26MAR2023 00:02:43 21.1S 68.6W Mw=5.4 EMSC ANTOFAGASTA, CHILE
P: 27MAR2023 151932 22.0S 69.0W 4.0-6.0 AAAAA Coast No. Chile
The strongest earthquake in the U.S. or Canada today was an M 4.3 in the Fox Islands, Aleutians, Alaska. This is probably a regional aftershock of the M 4.9 of March 20, 2023. It was not felt in this remote area. Forecast 151879 had expected this event within about 50 km was likely around March 28.
O: 26MAR2023 01:43:02 52.4N 168.2W mb=4.3 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 28MAR2023 151879 52.5N 169.2W 3.5-5.0 AAAAA Fox Islands, Aleutians
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: 25MAR2023 12:03:44 22.7N 95.3E mb=4.3 EMSC MYANMAR
P: 22MAR2023 151752 21.0N 95.0E 4.0-5.5 BBAAA Myanmar
O: 26MAR2023 04:43:49 21.5N 121.4E mb=4.4 EMSC TAIWAN REGION
O: 26MAR2023 04:43:52 21.6N 121.3E ML=4.6 TAI Hualien, Taiwan
P: 26MAR2023 151760 22.0N 123.0E 4.0-5.4 AABAA Taiwan
NEIC reported this earthquake of M 4.4 south of Taiwan was felt with intensity II-III in the area(s) of south of Taiwan in Chungli, Taoyuan.
CWB reported this earthquake was felt with intensity III in Taitung, and I in Pingtun Counties, Taiwan.
O: 25MAR2023 18:13:07 28.9N 51.4E mb=4.6 EMSC SOUTHERN IRAN
P: 24MAR2023 151757 29.0N 53.0E 3.5-5.1 AABAA So. Iran/Persian Gulf
P: 30MAR2023 151757 28.0N 52.0E 3.5-5.4 BAAAA So. Iran/Persian Gulf
O: 25MAR2023 19:13:32 32.6N 47.7E mb=4.8 EMSC IRAN-IRAQ BORDER REGION
P: 27MAR2023 151814 33.0N 48.0E 3.8-5.4 AAAAA So. Iran
O: 26MAR2023 04:28:29 44.9N 102.1E mb=4.5 EMSC CENTRAL MONGOLIA
P: 16MAR2023 151529 39.0N 100.0E 3.5-5.0 CCBAA So. China
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 25MAR2023 22:53:19 1.2N 128.2E ML=4.6 EMSC HALMAHERA, INDONESIA
P: 27MAR2023 151682 2.0N 129.0E 4.0-5.4 AAAAA Halmahera
O: 25MAR2023 10:17:13 2.3S 139.1E ML=4.3 EMSC NEAR N COAST OF PAPUA, INDONES
P: 21MAR2023 151711 1.0S 137.0E 4.0-5.6 BBBAA West Irian, PNG
O: 25MAR2023 20:12:19 3.0S 136.9E ML=4.3 EMSC NEAR N COAST OF PAPUA, INDONES
P: 21MAR2023 151711 1.0S 137.0E 4.0-5.6 BBAAA West Irian, PNG
O: 25MAR2023 14:19:42 3.1S 142.8E ML=4.0 EMSC NEAR N COAST OF NEW GUINEA, PN
P: 27MAR2023 151705 3.0S 143.0E 4.0-5.4 AAAAA Papua New Guinea
O: 25MAR2023 18:58:12 4.2S 137.0E ML=4.2 EMSC PAPUA, INDONESIA
P: 22MAR2023 151712 4.0S 135.0E 4.0-5.8 BABAA West Irian, PNG
O: 25MAR2023 10:16:26 5.2N 125.5E mb=4.3 EMSC MINDANAO, PHILIPPINES
P: 23MAR2023 151686 5.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines
O: 26MAR2023 02:53:26 5.3N 94.4E mb=4.5 EMSC NORTHERN SUMATRA, INDONESIA
P: 17MAR2023 151409 5.0N 97.0E 4.0-5.4 CACAA Nicobar Islands
O: 25MAR2023 09:11:01 5.3S 102.0E mb=4.4 EMSC SOUTHERN SUMATRA, INDONESIA
P: 28MAR2023 151708 6.0S 103.0E 4.0-5.4 BAAAA So. of Sumatera
O: 26MAR2023 00:42:01 8.2S 119.6E ML=4.0 EMSC FLORES REGION, INDONESIA
P: 24MAR2023 151710 8.0S 119.0E 4.0-5.6 AAAAA Sumbawa Island area
O: 25MAR2023 16:32:20 8.8S 109.8E ML=4.0 EMSC JAVA, INDONESIA
P: 21MAR2023 151707 9.0S 110.0E 4.0-5.5 BAAAA So. of Java
P: 26MAR2023 151922 10.0S 109.0E 4.0-5.5 ABAAA So. of Java
O: 25MAR2023 21:35:38 17.2N 120.9E mb=4.5 EMSC LUZON, PHILIPPINES
P: 21MAR2023 151728 17.0N 120.0E 3.5-4.9 BAAAA Luzon, Philippines
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 25MAR2023 07:34:06 5.8S 77.6W ML=4.0 EMSC NORTHERN PERU
P: 26MAR2023 151703 6.0S 79.0W 4.0-5.5 AABAA No. Peru
O: 26MAR2023 02:24:15 9.9N 83.9W mb=4.1 EMSC COSTA RICA
P: 25MAR2023 151716 10.0N 84.0W 3.5-5.5 AAAAA Caribbean Sea
NEIC reported this earthquake of M 4.1 in Costa Rica was felt with intensity II-III in the area(s) of Costa Rica in Ipsis, San Jose, Alajuela, and Quepos, Puntarenas.
O: 26MAR2023 02:17:48 15.2N 94.3W mb=4.2 EMSC OFFSHORE CHIAPAS, MEXICO
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico
O: 25MAR2023 15:29:36 16.0N 93.9W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO
O: 26MAR2023 06:51:47 15.9N 92.8W ML=4.1 EMSC CHIAPAS, MEXICO
P: 26MAR2023 151722 15.0N 92.0W 3.5-5.1 AAAAA Guatemala
O: 25MAR2023 13:17:03 16.0N 96.1W ML=4.1 EMSC OAXACA, MEXICO
P: 24MAR2023 151735 15.0N 96.0W 3.5-5.4 AAAAA Oaxaca, Mexico
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico
O: 25MAR2023 21:16:38 16.1N 96.2W ML=4.0 EMSC OAXACA, MEXICO
O: 26MAR2023 00:15:32 16.9N 95.7W ML=4.2 EMSC OAXACA, MEXICO
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico
O: 25MAR2023 20:23:16 17.1S 72.2W ML=4.0 EMSC NEAR COAST OF SOUTHERN PERU
P: 26MAR2023 151920 18.0S 72.0W 4.0-5.8 AAAAA So. Peru/Bolivia
O: 25MAR2023 15:20:37 17.3N 94.1W ML=4.0 EMSC VERACRUZ, MEXICO
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 ABAAA Chiapas, Mexico
O: 25MAR2023 16:27:09 17.9S 74.3W mb=4.6 EMSC OFF COAST OF SOUTHERN PERU
P: 28MAR2023 151920 18.0S 73.0W 4.0-5.8 BAAAA So. Peru/Bolivia
O: 26MAR2023 00:17:26 18.5N 68.4W MD=4.2 EMSC MONA PASSAGE, DOMINICAN REPUBL
P: 27MAR2023 151738 18.0N 69.0W 3.4-5.1 AAAAA Puerto Rico
O: 26MAR2023 00:41:05 19.3N 67.9W ML=3.5 EMSC DOMINICAN REPUBLIC REGION
P: 24MAR2023 151744 20.0N 69.0W 3.0-4.9 AAAAA Bahamas/No. Caribbean
O: 26MAR2023 00:02:43 21.1S 68.6W Mw=5.4 EMSC ANTOFAGASTA, CHILE
P: 27MAR2023 151932 22.0S 69.0W 4.0-6.0 AAAAA Coast No. Chile
O: 26MAR2023 00:39:53 22.4S 66.2W mb=4.6 EMSC JUJUY, ARGENTINA
P: 21MAR2023 151930 22.0S 67.0W 4.0-5.7 BAAAA Argentina
O: 25MAR2023 07:30:13 23.0S 68.8W Mw=4.6 EMSC ANTOFAGASTA, CHILE
P: 27MAR2023 151932 22.0S 69.0W 4.0-6.0 AAAAA Coast No. Chile
O: 25MAR2023 18:34:16 23.7N 109.5W ML=3.5 EMSC GULF OF CALIFORNIA
O: 25MAR2023 18:29:06 23.7N 109.5W ML=3.3 EMSC GULF OF CALIFORNIA
P: 25MAR2023 151747 24.0N 109.0W 3.5-5.1 AAAAA Gulf of California
AFRICA AND EUROPE
O: 25MAR2023 20:56:05 34.7N 25.4E mb=4.3 EMSC CRETE, GREECE
P: 28MAR2023 151777 34.0N 25.0E 3.0-4.9 BAAAA Crete
O: 25MAR2023 17:39:37 36.6N 4.0E mb=3.7 EMSC NORTHERN ALGERIA
P: 29MAR2023 151823 37.0N 4.0E 3.0-4.7 BAAAA Western Mediterranean
O: 26MAR2023 03:07:37 44.8N 42.6E mb=4.2 EMSC CAUCASUS REGION, RUSSIA
P: 16MAR2023 151548 43.0N 44.0E 3.5-5.0 CBAAA Caucasus/Caspian Sea
O: 25MAR2023 23:32:09 45.5N 26.3E ML=3.9 EMSC ROMANIA
P: 24MAR2023 151860 46.0N 25.0E 3.0-5.0 AAAAA Romania/NW Turkey
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 25MAR2023 21:55:34 16.1S 174.8W mb=4.6 EMSC TONGA
P: 24MAR2023 151915 15.0S 173.0W 4.0-5.6 ABBAA Samoa Islands
O: 25MAR2023 19:57:56 18.2S 168.0E mb=4.8 EMSC VANUATU
O: 25MAR2023 23:29:04 18.2S 168.0E mb=4.8 EMSC VANUATU
P: 23MAR2023 151928 19.0S 168.0E 4.0-5.6 AAAAA Vanuatu Islands
O: 25MAR2023 09:46:50 20.4S 177.8W Mw=4.9 EMSC FIJI REGION
P: 22MAR2023 151939 20.0S 178.0W 4.0-5.4 BAAAA Tonga Islands
O: 25MAR2023 09:58:34 21.0S 173.5E Mw=5.0 EMSC VANUATU REGION
P: 23MAR2023 151933 22.0S 172.0E 4.0-5.8 AABAA Loyalty Islands
P: 30MAR2023 151942 21.0S 174.0E 4.0-5.4 BAAAA Tonga/Fiji
OCEAN RIDGES
O: 25MAR2023 13:57:41 32.8N 39.8W mb=4.7 EMSC NORTHERN MID-ATLANTIC RIDGE
P: 21MAR2023 151792 32.0N 41.0W 4.0-5.8 BAAAA No. Mid-Atlantic Ridge
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: 25MAR2023 16:18:05 50.0N 156.6E mb=4.4 EMSC KURIL ISLANDS
P: 21MAR2023 151880 51.0N 158.0E 4.0-5.7 BAAAA Kamchatka
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 25MAR2023 10:53:57 29.9N 115.0W ML=3.7 EMSC BAJA CALIFORNIA, MEXICO
P: 26MAR2023 151799 30.2N 114.4W 2.0-4.4 AAAAA SW U.S.A
O: 25MAR2023 08:02:40 31.3N 115.3W ML=3.5 EMSC BAJA CALIFORNIA, MEXICO
O: 25MAR2023 07:33:16 31.4N 115.5W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
O: 25MAR2023 17:14:52 30.7N 116.2W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO
O: 25MAR2023 16:51:21 30.7N 116.2W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 27MAR2023 151802 30.9N 116.3W 2.5-4.6 AAAAA So. California
O: 25MAR2023 22:14:07 31.8N 116.3W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO
P: 23MAR2023 151803 32.0N 116.3W 2.5-4.7 AAAAA So. California
O: 25MAR2023 19:53:15 32.8N 117.0W Ml=2.1 EMSC SAN DIEGO CTY URBAN AREA, CALI
P: 23MAR2023 151804 32.9N 117.6W 2.5-4.6 AAAAA So. California
O: 26MAR2023 06:20:44 35.8N 116.9W ML=3.3 EMSC SOUTHERN CALIFORNIA
O: 26MAR2023 06:20:44 35.8N 116.9W ML=3.6 ANSS SOUTHERN CALIFORNIA
P: 25MAR2023 151810 35.1N 117.0W 2.5-4.8 AAAAA So. California
NEIC reported this earthquake of M 3.6 in Central California near Ridgecrest was felt with intensity II-III in the area(s) of Central California near Ridgecrest and in Lancaster, Crestline.
O: 26MAR2023 02:53:33 36.6N 121.1W Md=2.0 EMSC CENTRAL CALIFORNIA
P: 25MAR2023 151769 36.8N 121.3W 2.5-4.6 AAAAA Central California
O: 26MAR2023 04:05:49 38.8N 122.8W Md=2.4 EMSC NORTHERN CALIFORNIA
P: 24MAR2023 151771 38.8N 122.8W 2.5-4.6 AAAAA Central California
O: 25MAR2023 09:04:22 40.3N 125.3W ML=3.1 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 26MAR2023 151852 40.6N 124.9W 2.5-4.5 AAAAA Off Coast of No. Calif
NEIC reported this earthquake of M 3.1 off the coast of Northern California was felt with intensity II-III in the area(s) of Northern California in Eureka, Arcata, Garberville, Willits, Martinez and Stockton.
ALASKA
O: 25MAR2023 20:27:14 51.9N 178.1W ML=3.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
P: 27MAR2023 151872 51.7N 176.4W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians
O: 26MAR2023 01:43:02 52.4N 168.2W mb=4.3 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 28MAR2023 151879 52.5N 169.2W 3.5-5.0 AAAAA Fox Islands, Aleutians
O: 26MAR2023 04:06:48 54.4N 159.7W ML=3.3 EMSC SOUTH OF ALASKA
P: 26MAR2023 151889 54.7N 161.2W 3.5-5.3 AAAAA Unimak Islands, Aleutians
O: 25MAR2023 14:55:18 61.3N 151.5W ML=3.0 EMSC SOUTHERN ALASKA
P: 23MAR2023 151898 61.3N 152.3W 3.2-5.1 AAAAA Central Alaska
O: 25MAR2023 07:54:14 62.2N 152.1W ML=3.4 EMSC CENTRAL ALASKA
P: 25MAR2023 151898 62.6N 151.4W 3.2-5.1 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
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: 25MAR2023 15:05:16 28.7N 98.3W ML=2.9 EMSC SOUTHERN TEXAS
P: 27MAR2023 151754 28.0N 98.0W 3.0-4.7 AAAAA Northern Mexico
HAWAII
O: 26MAR2023 02:25:03 19.3N 155.2W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII
P: 27MAR2023 151723 19.2N 155.2W 3.0-4.7 AAAAA Hawaii
NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Pepeekeo.
MODERATE EARTHQUAKE IN TONGA ON ANOTHER QUIET DAY IN SEISMICITY
EARTHQUAKE SUMMARY FOR MARCH 24, 2023
It was another quiet day in global seismicity. This is likely to continue for several more days as seismic stress builds back following the unusual series of earthquakes on March 21-22 probably promoted by a strong GRB, geomagnetic storm and new moon. The only earthquake of M>=5 reported in the world today was an M 5.6 in Fiji.
This earthquake of M 5.6 in Central Tonga/Fiji was not reported felt in this remote area. It occurred near local solar midnight and was probably promoted by high tidal stresses which maximize near this hour. An M 4.4 about 150 km west of the mainshock occurred near local solar noon, another time when tidal stress maximizes. Forecast 151939 had expected this activity was likely around March 22, 2023.
O: 24MAR2023 13:01:34 20.3S 176.6W Mw=5.6 EMSC FIJI REGION
P: 22MAR2023 151939 20.0S 178.0W 4.0-5.4 AAAAA Tonga Islands
O: 24MAR2023 22:41:30 20.5S 178.1W mb=4.4 EMSC FIJI REGION
P: 22MAR2023 151939 20.0S 178.0W 4.0-5.4 AAAAA Tonga Islands
The strongest earthquake felt in the U.S. or Canada today was a light earthquake in Southern California near Borrego Springs of M 3.1-3.4. Earthquakes at this magnitude level in this area of Southern California are common. Today's M 3.4 follows similar earthquakes within about 50 km of this epicenter most recently on February 1, 2023 (M 3.1) an January 9 and 11, 2023 (M 3.2) but the last event in the area of larger magnitude was an M 4.2 on December 31, 2022. Forecast 141804 had expected today's epicenter would be active around March 26.
NEIC reported these earthquakes of M 2.9 and 3.4 in Borrego Springs, California were felt with intensity II-III in the area(s) of Borrego Springs, California in El Cajon, San Diego, Palm Desert, Julian, Descanso, Ramona, Alpine, Boulevard, Lakeside, Escondido and La Quinta.
O: 24MAR2023 13:59:00 33.2N 116.4W Ml=2.3 EMSC SOUTHERN CALIFORNIA
O: 24MAR2023 15:04:04 33.2N 116.4W ML=2.9 EMSC SOUTHERN CALIFORNIA
O: 24MAR2023 13:45:13 33.2N 116.4W ML=3.1 EMSC SOUTHERN CALIFORNIA
O: 24MAR2023 13:45:13 33.2N 116.4W ML=3.4 ANSS SOUTHERN CALIFORNIA
P: 26MAR2023 151804 33.4N 116.7W 2.5-4.6 AAAAA So. California
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: 24MAR2023 10:04:18 23.7N 121.3E ML=4.2 EMSC TAIWAN
O: 24MAR2023 10:04:18 23.7N 121.3E ML=4.2 TAI Hualien, Taiwan
P: 24MAR2023 151760 23.0N 122.0E 4.0-5.4 AAAAA Taiwan
CWB reported this earthquake was felt with intensity III in Hualien and I in Nantou, Taichung,Changhua, Taitung, Yunlin, Chiayi Counties, Taiwan.
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 24MAR2023 14:26:44 2.3S 139.0E ML=4.6 EMSC NEAR N COAST OF PAPUA, INDONES
O: 24MAR2023 09:26:32 2.6S 138.9E mb=4.7 EMSC PAPUA, INDONESIA
P: 21MAR2023 151711 1.0S 137.0E 4.0-5.6 BBBAA West Irian, PNG
O: 25MAR2023 06:23:47 2.7N 125.9E ML=4.5 EMSC KEPULAUAN SANGIHE, INDONESIA
P: 31MAR2023 151682 2.0N 127.0E 4.0-5.5 CAAAA Halmahera
O: 24MAR2023 23:59:22 6.5N 126.0E ML=4.5 EMSC MINDANAO, PHILIPPINES
P: 26MAR2023 151686 6.0N 125.0E 4.0-5.5 AAAAA Mindanao, Philippines
O: 24MAR2023 11:32:38 7.1S 126.0E mb=4.5 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 31MAR2023 151691 8.0S 125.0E 4.0-5.7 CAAAA Banda Sea
O: 24MAR2023 14:11:36 10.8S 113.3E ML=4.3 EMSC SOUTH OF JAVA, INDONESIA
O: 24MAR2023 12:16:12 10.9S 113.3E mb=4.6 EMSC SOUTH OF JAVA, INDONESIA
P: 21MAR2023 151706 9.0S 114.0E 4.0-5.6 BBAAA So. of Bali
O: 24MAR2023 15:13:22 14.5N 123.1E ML=4.4 EMSC LUZON, PHILIPPINES
P: 25MAR2023 151727 14.0N 122.0E 3.5-5.0 AAAAA Luzon, Philippines
CENTRAL AND SOUTH AMERICA
O: 24MAR2023 07:13:38 11.5S 73.3W ML=4.0 EMSC CENTRAL PERU
P: 24MAR2023 151912 15.0S 73.0W 4.0-5.5 ACAAA Central Peru
O: 25MAR2023 01:42:13 13.0N 61.2W ML=3.4 EMSC ST. VINCENT REGION, WINDWARD I
P: 27MAR2023 151743 11.0N 63.0W 3.4-5.1 ABBAA Windward Islands
NEIC reported this earthquake of M 3.4 in Saint Vincent and the Grenadines was felt with intensity II-III in the area(s) of Stint Vincent and The Grenadines at Port Elizabeth, Hamilton, Kingstown and the Netherlands Antilles.
O: 24MAR2023 14:01:21 13.7N 90.5W mb=4.2 EMSC OFFSHORE GUATEMALA
P: 24MAR2023 151722 13.0N 90.0W 3.5-5.1 AAAAA Guatemala
O: 24MAR2023 22:34:25 15.0N 94.2W ML=4.2 EMSC OFF COAST OF CHIAPAS, MEXICO
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 AAAAA Chiapas, Mexico
O: 24MAR2023 09:44:57 15.5N 93.4W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
P: 26MAR2023 151722 15.0N 92.0W 3.5-5.1 AABAA Guatemala
O: 24MAR2023 08:30:18 16.0N 95.9W ML=4.1 EMSC OAXACA, MEXICO
O: 24MAR2023 14:41:45 16.1N 96.2W mb=4.3 EMSC OAXACA, MEXICO
P: 24MAR2023 151735 15.0N 96.0W 3.5-5.4 ABAAA Oaxaca, Mexico
NEIC reported this earthquake of M 4.3 in Oaxaca, Mexico was felt with intensity II-III in the area(s) of Oaxaca, Mexico in Cacaotepec.
O: 24MAR2023 07:10:36 16.8N 99.4W ML=4.0 EMSC GUERRERO, MEXICO
P: 23MAR2023 151736 17.0N 99.0W 3.5-5.6 AAAAA Oaxaca, Mexico
O: 25MAR2023 03:27:35 17.9N 100.7W ML=4.0 EMSC GUERRERO, MEXICO
P: 27MAR2023 151730 17.0N 101.0W 3.5-5.6 AAAAA Michoacan, Mexico
O: 24MAR2023 07:40:38 18.0N 66.2W Md=3.0 EMSC PUERTO RICO
P: 25MAR2023 151737 18.0N 66.0W 3.4-5.4 AAAAA Puerto Rico
O: 24MAR2023 21:27:57 18.3N 102.6W ML=4.2 EMSC MICHOACAN, MEXICO
P: 21MAR2023 151731 18.0N 102.0W 3.5-5.6 BAAAA Michoacan, Mexico
O: 24MAR2023 22:03:35 18.4N 73.5W ML=3.9 EMSC HAITI REGION
P: 25MAR2023 151739 19.0N 73.0W 3.4-5.4 AAAAA Puerto Rico
O: 24MAR2023 20:08:41 19.0N 65.2W Md=3.4 EMSC VIRGIN ISLANDS REGION
P: 22MAR2023 151744 20.0N 66.0W 3.0-5.0 AAAAA Bahamas/No. Caribbean
P: 29MAR2023 151725 19.0N 65.0W 3.0-5.3 BAAAA Leeward Islands
O: 25MAR2023 01:04:48 22.4S 69.1W ML=3.9 EMSC ANTOFAGASTA, CHILE
P: 27MAR2023 151932 22.0S 69.0W 4.0-6.0 AAAAA Coast No. Chile
AFRICA AND EUROPE
O: 24MAR2023 13:10:34 38.0N 37.6E mb=4.4 EMSC CENTRAL TURKEY
O: 24MAR2023 13:51:24 38.0N 36.3E ML=4.0 EMSC CENTRAL TURKEY
O: 25MAR2023 04:39:32 38.1N 37.0E ML=4.4 EMSC CENTRAL TURKEY
O: 25MAR2023 06:33:40 37.9N 36.3E ML=4.1 EMSC CENTRAL TURKEY
P: 23MAR2023 151820 38.0N 36.0E 3.5-5.1 AAAAA Turkey
O: 24MAR2023 07:09:57 40.9N 48.2E ML=4.2 EMSC AZERBAIJAN
P: 27MAR2023 151835 40.0N 50.0E 4.0-5.8 BABAA Kazakhstan
SOUTHWEST PACIFIC
O: 24MAR2023 13:01:34 20.3S 176.6W Mw=5.6 EMSC FIJI REGION
P: 22MAR2023 151939 20.0S 178.0W 4.0-5.4 AAAAA Tonga Islands
O: 24MAR2023 22:41:30 20.5S 178.1W mb=4.4 EMSC FIJI REGION
P: 22MAR2023 151939 20.0S 178.0W 4.0-5.4 AAAAA Tonga Islands
OCEAN RIDGES
O: 24MAR2023 18:27:40 32.8N 39.8W mb=4.5 EMSC NORTHERN MID-ATLANTIC RIDGE
P: 21MAR2023 151792 32.0N 41.0W 4.0-5.8 BAAAA No. Mid-Atlantic Ridge
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: 24MAR2023 07:25:34 36.4N 140.3E Mw=4.7 EMSC NEAR EAST COAST OF HONSHU, JAP
O: 24MAR2023 08:20:30 37.8N 141.8E ML=4.2 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 23MAR2023 151790 37.0N 139.0E 3.5-4.9 AAAAA No. Honshu, Japan
NEIC reported this earthquake of M 4.7 in Eastern Honshu, Japan was felt with intensity II-III in the area(s) of Eastern Honshu, Japan in Ibaraki and Saitama (IV) and in Tokyo.
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 24MAR2023 13:59:00 33.2N 116.4W Ml=2.3 EMSC SOUTHERN CALIFORNIA
O: 24MAR2023 15:04:04 33.2N 116.4W ML=2.9 EMSC SOUTHERN CALIFORNIA
O: 24MAR2023 13:45:13 33.2N 116.4W ML=3.1 EMSC SOUTHERN CALIFORNIA
P: 26MAR2023 151804 33.4N 116.7W 2.5-4.6 AAAAA So. California
O: 24MAR2023 09:49:09 34.4N 119.7W ML=2.2 EMSC SOUTHERN CALIFORNIA
P: 24MAR2023 151809 34.7N 119.0W 2.5-4.6 AAAAA So. California
O: 25MAR2023 04:32:10 35.5N 118.5W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 25MAR2023 04:32:10 35.5N 118.5W ML=2.9 ANSS CENTRAL CALIFORNIA
P: 27MAR2023 151811 35.4N 118.5W 2.5-4.8 AAAAA So. California
NEIC reported this earthquake of M 2.9 in Central California was felt with intensity II-III in the area(s) of Central California in Bodfish and Caliente.
O: 24MAR2023 07:50:34 37.3N 115.1W ml=2.2 EMSC NEVADA
P: 27MAR2023 151786 37.3N 114.9W 2.5-4.9 BAAAA Nevada area
O: 24MAR2023 07:46:09 38.4N 122.6W ML=2.4 EMSC NORTHERN CALIFORNIA
O: 24MAR2023 07:46:09 38.4N 122.6W ML=2.6 ANSS NORTHERN CALIFORNIA
O: 24MAR2023 13:02:01 38.4N 122.6W Md=2.0 EMSC NORTHERN CALIFORNIA
P: 26MAR2023 151771 38.5N 122.7W 2.5-4.6 AAAAA Central California
NEIC reported this earthquake of M 2.6 in Santa Rosa, Northern California was felt with intensity II-III in the area(s) of Santa Rosa, Northern California in Rohnert Park, Cotati, Sebastopol. Petaluma.
ALASKA
O: 24MAR2023 20:47:34 52.2N 170.4W ML=3.5 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 28MAR2023 151879 52.5N 169.2W 3.5-5.0 BAAAA Fox Islands, Aleutians
O: 25MAR2023 01:48:07 54.3N 159.8W ML=3.0 EMSC SOUTH OF ALASKA
P: 26MAR2023 151889 54.7N 161.2W 3.5-5.3 AAAAA Unimak Islands, Aleutians
O: 24MAR2023 20:23:20 60.1N 151.6W ML=3.2 EMSC KENAI PENINSULA, ALASKA
P: 23MAR2023 151898 61.3N 152.3W 3.2-5.1 BAAAA Central Alaska
NEIC reported this earthquake of M 3.0 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska in Kasilof.
O: 24MAR2023 15:43:37 62.3N 151.0W ML=3.0 EMSC CENTRAL ALASKA
P: 25MAR2023 151898 62.6N 151.4W 3.2-5.1 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 24MAR2023 20:16:36 47.2N 118.3W Ml=2.0 EMSC WASHINGTON
O: 24MAR2023 18:44:42 47.4N 117.9W Ml=2.2 EMSC WASHINGTON
P: 30MAR2023 151841 47.7N 117.4W 2.0-4.3 AAAAA Montana/Idaho
O: 24MAR2023 08:45:10 47.5N 123.0W Ml=2.4 EMSC PUGET SOUND REGION, WASHINGTON
P: 24MAR2023 151866 46.9N 122.0W 2.0-3.9 AAAAA Washington state, U.S.
ROCKY MOUNTAINS REGION
O: 24MAR2023 16:19:28 31.7N 104.4W ML=2.3 EMSC WESTERN TEXAS
O: 24MAR2023 20:22:08 31.7N 104.2W ML=2.3 EMSC WESTERN TEXAS
O: 24MAR2023 12:15:07 31.7N 104.3W ML=2.3 EMSC WESTERN TEXAS
P: 24MAR2023 151800 31.5N 103.6W 2.0-3.9 AAAAA SW U.S.A
O: 24MAR2023 16:50:36 32.1N 102.7W ML=2.0 EMSC WESTERN TEXAS
P: 26MAR2023 151800 31.5N 101.6W 2.0-3.9 AAAAA SW U.S.A
EASTERN U.S./CANADA
O: 24MAR2023 13:43:51 36.4N 96.9W ML=2.2 EMSC OKLAHOMA
P: 25MAR2023 151817 36.0N 97.0W 2.0-4.4 AAAAA Southern Plains
HAWAII
O: 24MAR2023 11:53:01 19.3N 155.4W ML=3.0 EMSC ISLAND OF HAWAII, HAWAII
P: 27MAR2023 151723 19.2N 155.2W 3.0-4.7 BAAAA Hawaii
QUIET SEISMICITY RETURNS AFTER SEISMIC STRESS RELIEVED IN PREVIOUS DAYS
EARTHQUAKE SUMMARY FOR MARCH 23, 2023
Global seismicity quickly returned to quiet conditions today after most seismic strain was used up in the firestorm of seismicity yesterday with the beginning of the geomagnetic storm and the new moon as described in the previous issue of this summary:
"A series of events today appear to have helped ignite an equally surprising series of moderately large to large earthquakes around the world turning the daily earthquake map red. This activity included events of M 6.5 in Argentina followed by an M 5.9 in Tajikistan; an M 5.7 in Papua New Guinea; an M 5.6 in the northern Philippines; an M 5.6 in Northern Honshu, Japan; an M 5.5 in the Kermadec Islands. Unusual events in the France-Switzerland border (M 4.2) and in southern Australia (M 4.9) were among a number of other notable earthquakes today." (March 24, 2023)
"The strongest and only moderate to moderately large earthquake in the world today was an M 5.6 hit the Turkey-Iran Border region today. NEIC reported it was felt strongly in Iran with intensity VI in Khoi, Sahbuz, Dilman, Azerbaijan; IV in Merand, Azar and Tebriz and II-III in Alamdar and Orumiyeh among others.
This is the largest earthquake along the Turkey-Iran border within about 150 km of this epicenter since an M 5.8 and 5.9 in January, 2023. At the time this summary noted in this regard:
“The strongest earthquake in the world today was a strong M 5.9 near the Turkey-Iran border in the area of Azerbaijan. NEIC reported it was felt with damage with intensity VIII in Azerbaijan, Iran in Khoi, Dilman; V in Tebriz, IV inOrumiyeh, Ardakan, Yaed, Chalus, Mazandaran and II in Merand with intensity IV in Yerevan, Armenia. Iranian state media reported some homes were destroyed and that the "amount of destruction of some houses and buildings in the city of Khoy is relative high". News reported at least 300 injured including 122 in the city of Khoy - a toll which included three deaths. Emergency teams were dispatched to the area which was in the midst of a strong winter storm with sub-zero temperatures and power outages at the time of the earthquake. This event appears to continue enhanced seismicity with strong tidal stresses associated with the new moon of January 21 as it occurred near the longitude of maximum tidal stress with that alignment as defined in previous issues of this summary:
The last earthquale of M 5.9 within about 200 km of today's mainshock was an
M 6.0 on February 23, 2020. The only other event of M>=5.9 in this region in the past 35 years was an M 7.1 on October 23, 2011. At the time of the M 6.0 in February, 2020 this summary noted:
"This area of Turkey-Iran border first became active on February 16, 2020 with an M 4.8 foreshock. The last earthquake within about 200 km of today's M 6.0 with equal or larger magnitude occurred on August 11, 2012 with M 6.3 and 6.4 about 200 km east of today's epicenter. The only other such event in the region in the past 30 years was an M 7.1-7.3 on October 23, 2011." (February 24, 2020)
Today’s epicenter is located at 144 degrees from the M 7.0 in the Kermadec Islands and at similar distance from other recent major quakes in Tonga and Fiji and was probably promoted by energy from those sources.
Forecasts 151538 and 151821 had expected today' event was likely in mid-March.
O: 24MAR2023 03:16:57 38.4N 44.9E Mw=5.6 EMSC TURKEY-IRAN BORDER REGION
P: 16MAR2023 151538 38.0N 44.0E 3.5-5.4 CAAAA Turkey
P: 25MAR2023 151821 38.0N 43.0E 3.5-5.1 AABAA Turkey
A series of moderate earthquakes also occurred today near local solar noon and local solar midnight in the region of the Izu Islands, Japan. They were not
reported felt in this remote area south of Honshu, Japan. The M 5.4 is this strongest
event within about 200 km of these epicenter in the Izu Islands since an M 5.8 on February 5, 2023. Forecast 151794 had expected this activity was likely around March 23, 2023. This epicenter is at the fifth node (72 degrees) from the M 7.0 in the Kermadec Islands of March 16, 2023 at the seventh node (51 degrees) from the M 7.0 in Vanuatu of January 8 and may have been promoted by energy from those sources.
O: 24MAR2023 04:25:27 30.0N 142.0E Mw=5.4 EMSC IZU ISLANDS, JAPAN REGION
O: 24MAR2023 04:37:10 30.0N 141.9E mb=4.7 EMSC IZU ISLANDS, JAPAN REGION
O: 24MAR2023 04:38:09 30.0N 141.9E mb=5.0 EMSC IZU ISLANDS, JAPAN REGION
O: 23MAR2023 18:36:42 30.0N 142.0E mb=4.6 EMSC IZU ISLANDS, JAPAN REGION
P: 23MAR2023 151794 31.0N 142.0E 4.0-5.4 AAAAA Off East Coast Honshu
A light to moderate earthquake of M 3.9-4.2 was felt widely in Hawaii today. NEIC reported intensity II-III in Hawaii at Hawaii National Park, Hilo, Volcano, Paauilo, Mountain View, Captain Cook, Papaikou, Kakalau, Pahoa and Pepeekeo. The last earthquake in Hawaii of M>=4.2 was an M 4.8 on February 15, 2023.
At the time this summary noted:
"The M 4.5-4.8 in Hawaii was felt throughout the big island. NEIC reported maximum intensity V in Naalehu with IV in Volcano, Captain Cook, Pahoa, Mountain View with III in Hawaii National Park, Hilo, Holualoa and Kurtistown among others. The mainshock was preceded by an M 3.7 which was felt with intensity III in Naalehu and Captain Cook. This is the strongest earthquake in Hawaii since an M 5.0 on October 14, 2022 and prior to that an M 6.2 south of Hawaii on October 10, 2021." (February 15, 2023)
Forecast 151723 had expected enhanced seismicity in Hawaii around March 24.
O: 24MAR2023 03:04:00 19.5N 155.5W ML=4.2 EMSC ISLAND OF HAWAII, HAWAII
P: 24MAR2023 151723 19.9N 156.1W 3.0-4.7 AAAAA Hawaii
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: 23MAR2023 10:26:48 21.7N 100.5E ML=4.5 EMSC MYANMAR-CHINA BORDER REGION
P: 23MAR2023 151753 26.0N 101.0E 4.0-5.6 ACAAA Myanmar
O: 23MAR2023 13:21:09 24.3N 94.3E ML=3.8 EMSC MYANMAR-INDIA BORDER REGION
O: 24MAR2023 03:22:40 24.2N 93.9E ML=3.9 EMSC MANIPUR, INDIA REGION
P: 23MAR2023 151752 25.0N 95.0E 4.0-5.4 AAAAA Myanmar
O: 24MAR2023 05:01:49 26.0N 78.3E ML=4.0 EMSC MADHYA PRADESH REGION, INDIA
P: 22MAR2023 151824 30.0N 82.0E 3.8-5.2 ACCAA Xizang
O: 23MAR2023 08:44:28 28.9N 97.0E ML=4.2 EMSC EASTERN XIZANG-INDIA BORDER RE
P: 21MAR2023 151753 27.0N 97.0E 4.0-5.5 ABAAA Myanmar
O: 24MAR2023 04:06:24 29.6N 81.8E mb=4.2 EMSC NEPAL
P: 22MAR2023 151824 30.0N 82.0E 3.8-5.2 AAAAA Xizang
O: 23MAR2023 11:38:07 33.3N 72.6E ML=3.9 EMSC PAKISTAN
P: 20MAR2023 151512 33.0N 74.0E 3.8-5.6 BAAAA Pakistan
O: 23MAR2023 07:18:18 36.3N 71.2E mb=4.3 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 27MAR2023 151779 36.0N 71.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
O: 23MAR2023 10:36:23 51.4N 159.9E mb=4.0 EMSC OFF EAST COAST OF KAMCHATKA
O: 23MAR2023 10:38:40 51.4N 160.0E mb=4.2 EMSC OFF EAST COAST OF KAMCHATKA
P: 27MAR2023 151880 52.0N 159.0E 4.0-5.9 BAAAA Kamchatka
INDONESIA AND PHILIPPINES
O: 23MAR2023 08:36:47 3.9S 133.5E ML=4.1 EMSC PAPUA, INDONESIA
P: 25MAR2023 151712 2.0S 134.0E 4.0-5.4 ABAAA West Irian, PNG
O: 24MAR2023 02:38:52 7.1S 125.7E mb=4.8 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 24MAR2023 151690 6.0S 125.0E 4.0-5.4 ABAAA Banda Sea
P: 24MAR2023 151696 8.0S 124.0E 4.0-5.4 AABAA Flores Island area
O: 23MAR2023 11:21:29 7.8S 126.6E ML=4.4 EMSC KEPULAUAN BARAT DAYA, INDONESIA
O: 23MAR2023 07:56:38 7.7S 127.9E mb=4.8 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 30MAR2023 151691 8.0S 129.0E 4.0-5.4 CAAAA Banda Sea
O: 23MAR2023 08:51:56 9.9S 116.1E ML=4.0 EMSC LOMBOK REGION, INDONESIA
P: 18MAR2023 151635 10.0S 116.0E 4.0-5.4 BAAAA Sumbawa Island area
CENTRAL AND SOUTH AMERICA
O: 23MAR2023 17:50:36 11.5S 73.3W ML=4.1 EMSC CENTRAL PERU
P: 24MAR2023 151912 15.0S 73.0W 4.0-5.5 ACAAA Central Peru
O: 24MAR2023 04:28:36 18.8N 71.1W ML=3.8 EMSC DOMINICAN REPUBLIC
P: 23MAR2023 151739 19.0N 71.0W 3.4-5.5 AAAAA Puerto Rico
O: 24MAR2023 04:36:09 19.2N 66.6W Md=3.7 EMSC PUERTO RICO REGION
P: 22MAR2023 151744 20.0N 66.0W 3.0-5.0 AAAAA Bahamas/No. Caribbean
O: 24MAR2023 05:03:36 19.5N 70.6W ML=3.0 EMSC DOMINICAN REPUBLIC
P: 23MAR2023 151739 19.0N 71.0W 3.4-5.5 AAAAA Puerto Rico
O: 24MAR2023 04:33:25 23.0S 66.6W mb=4.3 EMSC JUJUY, ARGENTINA
P: 22MAR2023 151930 24.0S 66.0W 4.0-5.9 AAAAA Argentina
O: 22MAR2023 16:00 23.5S 66.7W mb=6.5 GUC Antofagasta at Antofagasta, V
O: 22MAR2023 15:18 23.5S 66.7W mb=5.3 GUC Argentina
P: 22MAR2023 151930 24.0S 66.0W 4.0-5.9 AAAAA Argentina
GUC reported this earthquake of M 6.5 was felt with intensity VI in Antofagasta at Antofagasta, V in Mejillones, Maria Elena, Tocopilla, Sierra Gorda, Calama; III in Taltal; IV in Atacama at Chanaral, Diego de Almagro, El Salvador, III in Caldera, Copiapo, Tierra Amarilla; in Tarapaca with IV in Iquique, Alto Hospicio, El Loa, Huara, Pozo Almonte; III in La Tirana, Pica and II in Camina; in Arica and Parinacota with IV in Cuya, II in Arica, Chile.
O: 24MAR2023 06:13:24 30.1S 71.3W ML=4.1 EMSC COQUIMBO, CHILE
O: 24MAR2023 06:13 30.1S 71.3W mb=4.1 GUC Coquimbo at La Higuera; III in
P: 23MAR2023 151944 30.0S 71.0W 4.0-5.5 AAAAA Coast Central Chile
GUC reported this earthquake was felt with intensity IV in Coquimbo at La Higuera; III in Monte Patria, Ovalle, Andacollo, La Serean, Vicuna, Chile.
O: 23MAR2023 21:24:11 36.7S 70.3W Mw=4.5 EMSC NEUQUEN, ARGENTINA
P: 24MAR2023 151947 37.0S 70.0W 4.0-5.6 AAAAA Central Chile
AFRICA AND EUROPE
O: 23MAR2023 10:04:56 38.0N 36.5E ML=4.2 EMSC CENTRAL TURKEY
O: 24MAR2023 00:39:55 38.0N 36.4E Mw=4.6 EMSC CENTRAL TURKEY
O: 23MAR2023 09:19:52 38.0N 36.4E mb=4.9 EMSC CENTRAL TURKEY
P: 23MAR2023 151820 38.0N 36.0E 3.5-5.1 AAAAA Turkey
NEIC reported this earthquake of M 4.9 in Central Turkey was felt with intensity II-III in the area(s) of Central Turkey in Kayseri, Gaziantep (IV), Adana, Urfa.
O: 24MAR2023 03:16:57 38.4N 44.9E Mw=5.6 EMSC TURKEY-IRAN BORDER REGION
P: 16MAR2023 151538 38.0N 44.0E 3.5-5.4 CAAAA Turkey
P: 25MAR2023 151821 38.0N 43.0E 3.5-5.1 AABAA Turkey
SOUTHWEST PACIFIC
O: 24MAR2023 05:32:02 15.4S 175.0W mb=4.2 EMSC TONGA
P: 24MAR2023 151915 15.0S 173.0W 4.0-5.6 AABAA Samoa 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: 24MAR2023 04:25:27 30.0N 142.0E Mw=5.4 EMSC IZU ISLANDS, JAPAN REGION
O: 24MAR2023 04:37:10 30.0N 141.9E mb=4.7 EMSC IZU ISLANDS, JAPAN REGION
O: 24MAR2023 04:38:09 30.0N 141.9E mb=5.0 EMSC IZU ISLANDS, JAPAN REGION
O: 23MAR2023 18:36:42 30.0N 142.0E mb=4.6 EMSC IZU ISLANDS, JAPAN REGION
P: 23MAR2023 151794 31.0N 142.0E 4.0-5.4 AAAAA Off East Coast Honshu
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 23MAR2023 10:05:52 31.5N 116.0W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO
O: 23MAR2023 09:53:00 31.1N 116.7W Ml=3.9 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 22MAR2023 151802 30.8N 116.3W 2.5-4.6 AAAAA So. California
O: 24MAR2023 05:20:06 33.9N 118.7W ML=2.4 EMSC CHANNEL ISLANDS REG., CALIFORN
P: 22MAR2023 151806 34.0N 118.7W 2.5-4.7 AAAAA So. California
O: 24MAR2023 00:30:20 35.5N 117.4W ML=3.0 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151526 35.0N 117.7W 2.5-4.9 BAAAA So. California
NEIC reported this earthquake of M 3.1 in Ridgecrest, Central California was felt with intensity II-III in the area(s) of Ridgecrest, Central California.
O: 23MAR2023 09:50:11 35.5N 118.4W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 22MAR2023 151811 35.6N 118.4W 2.5-4.7 AAAAA So. California
ALASKA
O: 23MAR2023 11:21:02 58.1N 138.2W ml=3.0 EMSC SOUTHEASTERN ALASKA
P: 22MAR2023 151887 57.0N 138.0W 3.0-4.4 ABAAA Southeast Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 23MAR2023 11:13:15 48.5N 123.2W Ml=2.6 EMSC VANCOUVER ISLAND, CANADA REGIO
P: 25MAR2023 151867 48.4N 123.2W 2.0-3.9 AAAAA Washington state, U.S.
NEIC reported this earthquake of M 2.6 in Vancouver, British Columbia was felt with intensity II-III in the area(s) of Vancouver, British Columbia in Victoria, Sidney, Sooke, and in Washington State in Friday Harbor, Eastsound, and Camano Island.
O: 23MAR2023 11:13:14 48.5N 123.2W MB=2.4 ECAN of Victoria, BC
P: 25MAR2023 151867 48.4N 123.2W 2.0-3.9 AAAAA Washington state, U.S.
ROCKY MOUNTAINS REGION
O: 23MAR2023 09:27:27 37.0N 112.9W Ml=2.0 EMSC UTAH
P: 24MAR2023 151822 38.6N 112.7W 2.0-4.4 ABAAA Utah area
EASTERN U.S./CANADA
O: 23MAR2023 12:37:00 36.8N 98.6W ML=2.2 EMSC OKLAHOMA
O: 23MAR2023 12:24:04 36.8N 98.5W ML=2.1 EMSC OKLAHOMA
P: 25MAR2023 151817 36.0N 97.0W 2.0-4.4 AABAA Southern Plains
HAWAII
O: 24MAR2023 03:04:00 19.5N 155.5W ML=4.2 EMSC ISLAND OF HAWAII, HAWAII
P: 24MAR2023 151723 19.9N 156.1W 3.0-4.7 AAAAA Hawaii
NEW MOON; GEOMAGNETIC STORM; GRB IGNITE GLOBAL SEISMICITY FIRESTORM
EARTHQUAKE SUMMARY FOR MARCH 22, 2023
A series of events today appear to have helped ignite an equally surprising series of moderately large to large earthquakes around the world turning the daily earthquake map red. This activity included events of M 6.5 in Argentina followed by an M 5.9 in Tajikistan; an M 5.7 in Papua New Guinea; an M 5.6 in the northern Philippines; an M 5.6 in Northern Honshu, Japan; an M 5.5 in the Kermadec Islands. Unusual events in the France-Switzerland border (M 4.2) and in southern Australia (M 4.9) were among a number of other notable earthquakes today. The Gamma Ray Burst, the strongest in the past three weeks was described in this summary as:
"A strong Gamma Ray Burst was recorded today. GRB 230233B occurred at 21:10:37 with UVOT magnitude greater than 18.3, the strongest GRB since February 28.
This GRB coincided with an M 2.3 in the San Francisco Bay, California area also at 21:10 near local solar noon. Earthquakes of M 5.6 in Northern Philippines and M 5.7 in New Guinea and M 4.9 in Albania followed in the several hours after this GRB." (March 22, 2023)
While tidal triggering of seismicity had been expected in this and previous issues of this summary with this new moon as:
"The new moon will arrive on March 21, 2023 at 17:23 UT. Longitudes which are sub-solar (local solar noon) are near 83 West longitude while those at local solar midnight are centered near 97 East longitude. In the west these include area of Central and northwestern South America and eastern U.S. and in the east areas of western Indonesia, Myanmar, and eastern China. These areas are most likely to see tidal triggering with this new moon. A moderately large to large tidally triggered earthquake is considered moderately likely with this new moon." (March 17-21, 2023)
Furthermore the strong geomagnetic storm which began today is the strongest since AP reached 94 on February 27 and peaked at high latitudes with KP 7 at about 12-15:0 UT today as noted in the "EXTERNAL EFFECTS" section of this summary:
"The geomagnetic field saw active conditions today. The AP level was 14. High latitudes saw major storm periods with AP 38. Middle latitudes were also at active conditions with AP 17. This is the strongest storm at high latitudes since A reached 41 on March 5 and 88 on February 27 and is expected to reach levels higher than at planetary levels in the next day. This is likely to promote enhanced seismicity throughout the world at this time but especially near the geomagnetic equator and at high latitudes." (March 22, 2023)
An unusual earthquake of M 4.9 occurred today off the southern coast of South Australia. NEIC reported it was felt with intensity IV in South Australia at Port Pirir and II-III in Whyalla, Gawler, Adelaide and Crafers-Bridgewater, Australia. The only earthquake with equal or larger magnitude within about 400 km of this epicenter in the past 35 years was a similar M 4.9 on October 8, 2021 about 400 km to the southeast of today's epicenter. At the time this summary noted:
"An unusual earthquake of M 4.9 occurred in Victoria, Australia today. NEIC reported it was felt with intensity II-III in Victoria and South Australia at Murray Bridge, Horsham, Midua, Moujnt Barker, Victor Harbor, Adelaide, Mount Gambler, Swan Hill, Hamilton and Maryborough. This is the strongest earthquake within about 300 km of this epicenter in at least 30 years. An M 4.8 hit the area on October 27, 2001 and about 400 km northwest of this on May 3, 1997, the only similar quakes in Victoria since 1990." (October 8, 2021)
Today's event in Australia occurred shortly after the Gamma Ray Burst of 21:00 UT and may have been promoted by effects related to this as well as the strong geomagnetic storm and high tidal stresses with the new moon.
O: 22MAR2023 23:23:09 32.8S 139.6E mb=4.9 EMSC NEAR COAST OF SOUTH AUSTRALIA
The strongest earthquake in the world today was an M 6.5 at an intermediate depth under Jujuy, Argentina. NEIC reported it was felt with maximum intensity IV in Calama, Antofagasta, Chile and II-III in Antofagasta, Iquique, in Brazil at Dorados Mato Grosso do Sul, Catalao and Diadema, Sao Paulo and in Jujuy and Salta, Argentina. A foreshock hit the same region about an hour before the mainshock with M 5.3. NEIC reported it was felt in Argentina at Jujuy and Salta and in Antofagasta, Chile. This earthquake occurred within minutes of local solar noon and was probably promoted by strong tidal stresses which maximize near this hour. A foreshock of M 5.3 occurred about half an hour earlier than the mainshock. The mainshock also occurred near the maximum of solar flare 6550 which had its maximum SFE at this longitude. It is also near the maximum effect longitude of the new moon and was likely promoted that alignment. The last earthquake of M>=6.4 within about 200 km of this epicenter occurred on May 10, 2022 with M 6.8. It was also associated with the new moon and a strong geomagnetic disturbance. At the time this summary noted:
"Today's M 6.8 in Argentina is the strongest earthquake within about 200 km of this epicenter since an M 7.2 near this epicenter on May 12, 2000, 22 years ago. An M 7.0 also occurred about 100 km north of this on May 24, 1993." (May 10, 2022)
Forecast 151930 had expected today's event within about 50 km was likely around March 22, 2023. This event is at 144 degrees from the M 7.6 in the Banda Sea of January 9 and the M 7.2 in Tajikistan of February 23, 2023 and may have been promoted by energy from those sources.
O: 22MAR2023 16:00:33 23.6S 66.6W Mw=6.4 EMSC JUJUY, ARGENTINA
O: 22MAR2023 15:18:49 23.6S 66.5W Mw=5.3 EMSC JUJUY, ARGENTINA
P: 22MAR2023 151930 24.0S 66.0W 4.0-5.9 AAAAA Argentina
An M 5.9 also occurred in Tajikistan today. NEIC reported it was felt with intensity V in Choruh-Dairon, Tajikistan with maximum intensity VI in Sulukfu, Os, Kyrgyzstan with IV in Khujand, Matcha, Kofarnihon, Dushanbe, Navabadski, Tajikistan and III in Bekobod, Taskent, Uzbekistan. NEIC reported the aftershock of M 4.5 in Tajikistan was felt with intensity II-III in the area(s) of Uzbekistan at Tashkent and Salor. While this epicenter is about 400 km northwest of the 7.2 in Tajikistan of February 23, 2023, it is likely related to regional stress redistribution related to that mainshock. The M 5.8 occurred within about an hour of local solar midnight and was probably also promoted by strong tidal, geomagnetic and GRB effects which maximized near this hour. Forecast 151780 had expected this earthquake within about 100 km was likely around March 26, 2023. This epicenter is located at 104 degrees from the M 7.0 in Vanuatu of January 8 and may have been promoted by energy from that source.
O: 23MAR2023 02:53:50 39.4N 69.7E mb=4.5 EMSC TAJIKISTAN
O: 23MAR2023 01:52:57 39.2N 69.8E ML=4.2 EMSC TAJIKISTAN
O: 22MAR2023 20:07:45 39.5N 70.0E mb=5.8 EMSC TAJIKISTAN
P: 26MAR2023 151780 39.0N 71.0E 3.8-5.6 BAAAA Hindu Kush/Pakistan
An M 5.7 occurred off the northern Coast of Papua New Guinea today. NEIC reported it was felt with maximum intensity IV in Papua New Guinea in Madang and II-III in Angoram, Laiagam, and Mount Hagen. The last earthquake within about 200 km of this epicenter with M>=5.7 was an M 6.1 on April 27, 2021. The last within about 100 km was an M 6.5 on November 7, 2017. Forecasts 151705 and 151701 had expected today's activity in New Guinea was likely within about 100 km of this epicenter around March 24-28.
O: 23MAR2023 00:17:39 4.4S 144.2E Mw=5.7 EMSC NEAR N COAST OF NEW GUINEA, PN
P: 24MAR2023 151705 4.0S 143.0E 4.0-5.4 AABAA Papua New Guinea
P: 28MAR2023 151701 4.0S 145.0E 4.0-5.4 BAAAA New Ireland
An M 5.6 was also felt in the northern Philippine Islands today. NEIC reported it was felt with intensity V in Namuac, Cagayan Valley and III in Piddig Ilocos and Liwan Cordillera. PHIVOLCS reported it was felt with intensity V in Calayan, Cagayan; IV in Bangui, Burgos and Pagudpud, Ilocos Norte; Claveria and Santa Praxedes, Cagayan and III in Luna , Apayao; Adams, Bacarra, Dumalneg, Pasuquin and San Nicolas, Ilocos Norte; Abulug, Aparri, Pamplona, Penablanca and Sanches-Mira, Cagayan. An M 6.0 occurred near this epicenter on June 30, 2022 and this may be the strongest aftershock to date of that event. Forecast 151759 had expected today's event was likely northwest of this epicenter around March 22.
O: 22MAR2023 23:31:57 19.3N 121.1E Mw=5.6 EMSC BABUYAN ISL REGION, PHILIPPINE
P: 22MAR2023 151759 21.0N 120.0E 4.0-5.4 ABAAA Taiwan
An M 5.6 also occurred in northern Honshu, Japan today. NEIC reported it was felt with light intensity in Iwate and Aomori, Japan. This is the strongest earthquake within about 150 km of this epicenter since an M 5.7 on October 5, 2021. The last event of significantly larger magnitude in this region was an M 6.3 on December 20, 2020. Strong triggering by tides or SFE can indicate a buildup of seismic stress and the possibility of a larger upcoming regional event. Forecasts 151551 and 151833 had expected this event was likely around March 17-26 within about 50 km of today's epicenter.
O: 22MAR2023 08:23:45 40.3N 143.0E mb=4.3 EMSC OFF EAST COAST OF HONSHU, JAPAN
O: 22MAR2023 07:36:59 40.3N 143.1E Mw=5.6 EMSC OFF EAST COAST OF HONSHU, JAPA
P: 17MAR2023 151551 40.0N 143.0E 3.5-5.6 BAAAA Hokkaido, Japan
P: 26MAR2023 151833 40.0N 142.0E 3.5-5.4 BAAAA Hokkaido, Japan
An M 5.5 aftershock also occurred in northern Kermadec Islands today. It was reported felt lightly at Meremere, Waikato, North Island, New Zealand.
This is the strongest aftershock to date of the M 7.0 in the Kermadec Islands of March 16, 2023. It occurred about 150 km northwest of that mainshock and was likely promoted by regional stress redistribution. Forecast 151949 and 151953 had expected today's event within about 100 km was likely around March 22-23.
O: 22MAR2023 14:16:46 30.3S 177.2W mb=5.5 EMSC KERMADEC ISLANDS, NEW ZEALAND
P: 22MAR2023 151949 30.0S 176.0W 4.0-5.4 AAAAA No. Kermadec Islands
P: 23MAR2023 151953 31.0S 178.0W 4.0-5.6 AAAAA So. Kermadec Islands
An unusually large M 4.2-4.4 hit the border of France and Switzerland today. NEIC reported it was felt with maximum intensity V in Arlesheim, Basel-Landschaft and IV in Zuchwil, Solthurn, Switzerland and II in Chezard-Saint-Martin, Nuenbergy and in France with II-III in Allenjoie, Delle Franche-Compte, Mertzen, Ronchamp, Bettlach, Alsace, Brunstatt, Habshein. This earthquake occurred near local solar noon and may have been promoted by strong tidal and/or geomagnetic effects. The last earthquake within about 200 km of today's epicenter with M>=4.2 was an M 4.3 on September 10, 2022 but the last of M>=4.4 was an M 4.4 on October 24, 2015. The last earthquake significantly larger magnitude in this areas was an M 5.5 on February 23, 2004. Forecast 151827 had expected today's event south of this epicenter in this area was likely around March 26, 2023. This epicenter is located at 142-144 degrees from the M 7.0 in Vanuatu of January 8 and may have been promoted by energy from that source.
O: 22MAR2023 14:50:34 47.4N 6.9E ML=4.4 EMSC SWITZERLAND
P: 26MAR2023 151827 45.0N 7.0E 3.0-5.3 BCAAA Austria
The largest earthquakes in the U.S. or Canada today occurred in the area of Sitka, Southeastern Alaska with M 4.2 and 4.3. NEIC reported this earthquake of M 3.7 in Southeastern Alaska was felt with intensity II-III in the area(s) of Southeastern Alaska in Elfin Cove, Gustavus and Douglas. The first of these of M 4.3 occurred near local solar midnight and may have been promoted by high tidal stresses and SFE from the new moon and geomagnetic storm which maximize near this hour. Forecast 151887 had expected this activity was likely within about 100 km around March 22, 2023.
O: 22MAR2023 14:34:04 58.1N 137.5W ml=3.7 EMSC SOUTHEASTERN ALASKA
O: 22MAR2023 09:59:13 58.2N 137.5W MB=4.3 ECAN of Sitka, Alaska, USA
O: 22MAR2023 14:34:04 58.2N 137.5W MB=4.2 ECAN of Sitka, Alaska, USA
O: 22MAR2023 09:59:13 58.2N 137.5W mb=4.0 EMSC SOUTHEASTERN ALASKA
P: 22MAR2023 151887 57.0N 138.0W 3.0-4.4 ABAAA Southeast Alaska
An unusual earthquake of M 3.6 was lightly felt in the Maliotenam area of Quebec, Canada today according to Earthquakes Canada (ECAN). This is the strongest earthquake within about 150 km of this epicenter since an M 4.1 on January 16, 2015 and an M 4.4 on September 21, 2013. The largest earthquake in this area in the past 35 years was an M 5.1 on March 16, 1999. Forecast 151549 and 151559 had expected this event within about 100 km was likely in mid-March.
O: 22MAR2023 14:06:49 50.1N 66.1W MB=3.6 ECAN of Maliotenam, QC, felt
O: 22MAR2023 14:06:49 50.1N 66.1W ML=3.6 EMSC EASTERN QUEBEC, CANADA
P: 11MAR2023 151549 49.0N 66.0W 2.0-4.4 CBAAA E. of Maine
P: 11MAR2023 151559 49.3N 67.5W 2.0-4.4 CAAAA Maine
As noted above an M 2.3 earthquake in the San Francisco region of California today coincided with the strongest GRB in the past three weeks (see above). As this earthquake occurred near local solar noon it may have been promoted by effects associated with the GRB. If this is the case, the area is very close to a stress breaking point. Forecast 151770 had expected this earthquake was likely within about 10 km around March 25.
O: 22MAR2023 21:10:10 37.3N 121.7W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 25MAR2023 151770 37.3N 121.6W 2.5-4.6 BAAAA Central California
An unusually large earthquake of M 4.8-4.9 also occurred shortly after the GRB in Albania. This is the largest earthquake in Albania since an M 5.5 on January 9, 2022. Forecasts 151789 and 151858 had expected today's activity Albania was likely within about 100 km around March 24-25.
NEIC reported this earthquake of M 4.4 and M 4.9 in Albania was felt with intensity II-III in the area(s) of Albania in Erseke, Kolonje. This epicenter is located at 142-144 degrees from the M 7.0 in Vanuatu of January 8 and may have been promoted by energy from that source.
O: 23MAR2023 02:09:34 40.4N 20.8E ML=3.7 EMSC ALBANIA
O: 23MAR2023 03:30:40 40.4N 20.7E mb=4.4 EMSC ALBANIA
O: 23MAR2023 01:43:20 40.5N 20.7E mb=4.8 EMSC ALBANIA
P: 24MAR2023 151789 39.0N 21.0E 3.0-4.6 ABAAA No. Greece
P: 25MAR2023 151858 40.0N 23.0E 3.0-5.3 AABAA Romania/NW Turkey
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: 22MAR2023 15:43:06 23.7N 121.3E ML=4.6 EMSC TAIWAN
O: 22MAR2023 15:43:05 23.7N 121.3E ML=4.6 TAI Hualien, Taiwan
O: 22MAR2023 21:51:05 23.7N 121.3E mb=4.2 EMSC TAIWAN
O: 22MAR2023 21:51:04 23.7N 121.3E ML=4.6 TAI Hualien, Taiwan
P: 24MAR2023 151760 23.0N 122.0E 4.0-5.4 AAAAA Taiwan
NEIC reported this earthquake of M 4.2 in Nantou, Taiwan was felt with intensity II-III in the area(s) of Nantou, Taiwan.
CWB reported the first earthquake of M 4.6 was felt with intensity III in Hualien, II in Nantou, Yunlin, and I in Yilan, Taichung, Changhua, Taitung, Chiayi, and Tainan Counties, Taiwan.
CWB reported the second earthquake of M 4.6 was felt with intensity III in Hualien, II in Nantou, Yunlin, and I in Yilan, Taichung, Changhua, Taitung, Chiayi, and Tainan Counties, Taiwan.
O: 22MAR2023 10:38:47 37.2N 54.7E mb=5.1 EMSC NORTHERN IRAN
P: 23MAR2023 151791 37.0N 51.0E 3.8-5.4 AACAA No. Iran
NEIC reported this earthquake of M 5.1 in Iran was felt with intensity II-III in the area(s) of Iran IV-V in Aliabad, Bonbad-e Kavus, Astarabad, Golestan, Bandar-e Shah, Kordkouy Ashraf Mazandaran; IV in Kalaleh, Ememshahr, Sari, Mazandaran and III in Aliabad and Gonbad-e Kavus, Golestan.
O: 23MAR2023 02:53:50 39.4N 69.7E mb=4.5 EMSC TAJIKISTAN
O: 23MAR2023 01:52:57 39.2N 69.8E ML=4.2 EMSC TAJIKISTAN
O: 22MAR2023 20:07:45 39.5N 70.0E mb=5.8 EMSC TAJIKISTAN
P: 26MAR2023 151780 39.0N 71.0E 3.8-5.6 BAAAA Hindu Kush/Pakistan
O: 22MAR2023 12:37:57 51.8N 159.3E mb=4.4 EMSC OFF EAST COAST OF KAMCHATKA
P: 21MAR2023 151880 51.0N 158.0E 4.0-5.7 AAAAA Kamchatka
NEIC reported this earthquake of M 4.3 in Kamchatka, Russia was felt with intensity II-III in the area(s) of Kamchatka, Russia in Petropavlovsk.
INDONESIA AND PHILIPPINES
O: 22MAR2023 18:41:38 2.6S 136.4E ML=4.0 EMSC NEAR N COAST OF PAPUA, INDONES
P: 21MAR2023 151711 1.0S 137.0E 4.0-5.6 ABAAA West Irian, PNG
O: 23MAR2023 00:17:39 4.4S 144.2E Mw=5.7 EMSC NEAR N COAST OF NEW GUINEA, PN
P: 24MAR2023 151705 4.0S 143.0E 4.0-5.4 AABAA Papua New Guinea
P: 28MAR2023 151701 4.0S 145.0E 4.0-5.4 BAAAA New Ireland
O: 22MAR2023 08:55:46 5.3N 126.3E ML=4.4 EMSC MINDANAO, PHILIPPINES
P: 23MAR2023 151686 5.0N 126.0E 4.0-5.6 AAAAA Mindanao, Philippines
O: 22MAR2023 20:23:45 8.9S 123.2E mb=5.1 EMSC FLORES REGION, INDONESIA
P: 24MAR2023 151696 8.0S 124.0E 4.0-5.4 AAAAA Flores Island area
NEIC reported this earthquake of M 5.1 in Flores Islands, Indonesia was felt with intensity II-III in the area(s) of Flores Islands, Indonesia in Maumere and Kupang, Timur.
O: 22MAR2023 23:31:57 19.3N 121.1E Mw=5.6 EMSC BABUYAN ISL REGION, PHILIPPINE
P: 22MAR2023 151759 21.0N 120.0E 4.0-5.4 ABAAA Taiwan
CENTRAL AND SOUTH AMERICA
O: 22MAR2023 13:45:19 11.1S 71.6W mb=4.5 EMSC CENTRAL PERU
P: 22MAR2023 151912 14.0S 71.0W 4.0-5.8 CAAAA Central Peru
O: 22MAR2023 13:36:08 29.7S 72.4W mb=4.2 EMSC OFFSHORE COQUIMBO, CHILE
P: 25MAR2023 151931 29.0S 72.0W 4.0-5.6 BAAAA Coast Central Chile
O: 22MAR2023 07:09:30 9.3N 84.2W ML=4.2 EMSC COSTA RICA
P: 20MAR2023 151433 10.0N 84.0W 3.5-5.6 AAAAA Caribbean Sea
O: 23MAR2023 01:44:42 10.5N 86.1W mb=4.4 EMSC OFF COAST OF COSTA RICA
O: 22MAR2023 20:30:30 10.3N 86.3W ML=4.4 EMSC OFF COAST OF COSTA RICA
P: 20MAR2023 151449 11.0N 86.0W 3.5-5.3 AAAAA Nicaragua
O: 22MAR2023 11:57:15 13.1N 89.3W ML=4.0 EMSC OFFSHORE EL SALVADOR
P: 24MAR2023 151722 13.0N 90.0W 3.5-5.1 AAAAA Guatemala
O: 22MAR2023 17:18:46 15.8N 95.1W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO
O: 23MAR2023 02:43:07 15.2N 94.7W ML=4.1 EMSC OFF COAST OF OAXACA, MEXICO
P: 22MAR2023 151718 15.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 23MAR2023 06:08:23 16.3S 75.1W mb=4.2 EMSC OFF COAST OF SOUTHERN PERU
P: 24MAR2023 151912 15.0S 76.0W 4.0-5.5 ABAAA Central Peru
O: 22MAR2023 15:27:04 16.7N 99.2W ML=4.6 EMSC GUERRERO, MEXICO
P: 23MAR2023 151736 17.0N 99.0W 3.5-5.6 AAAAA Oaxaca, Mexico
O: 22MAR2023 13:33:40 17.0N 94.0W ML=4.1 EMSC OAXACA, MEXICO
P: 29MAR2023 151719 17.0N 95.0W 3.5-5.3 CAAAA Chiapas, Mexico
O: 22MAR2023 08:05:29 19.5N 70.5W ML=3.0 EMSC DOMINICAN REPUBLIC
P: 23MAR2023 151739 19.0N 71.0W 3.4-5.5 AAAAA Puerto Rico
O: 22MAR2023 15:38:36 22.7S 68.9W mb=4.4 EMSC ANTOFAGASTA, CHILE
P: 27MAR2023 151932 22.0S 69.0W 4.0-6.0 BAAAA Coast No. Chile
O: 22MAR2023 15:18:49 23.6S 66.5W Mw=5.3 EMSC JUJUY, ARGENTINA
O: 22MAR2023 16:00:33 23.6S 66.6W Mw=6.4 EMSC JUJUY, ARGENTINA
P: 22MAR2023 151930 24.0S 66.0W 4.0-5.9 AAAAA Argentina
O: 22MAR2023 13:36:08 29.7S 72.4W mb=4.2 EMSC OFFSHORE COQUIMBO, CHILE
P: 25MAR2023 151931 29.0S 72.0W 4.0-5.6 BAAAA Coast Central Chile
O: 23MAR2023 05:43:54 34.1S 70.2W mb=4.1 EMSC LIBERTADOR O'HIGGINS, CHILE
P: 23MAR2023 151946 33.0S 72.0W 4.0-5.8 ABBAA Central Chile
AFRICA AND EUROPE
O: 23MAR2023 05:45:21 37.9N 36.6E mb=4.4 EMSC CENTRAL TURKEY
P: 23MAR2023 151820 38.0N 36.0E 3.5-5.1 AAAAA Turkey
O: 22MAR2023 19:43:25 38.2N 38.1E mb=4.1 EMSC EASTERN TURKEY
P: 27MAR2023 151820 38.0N 38.0E 3.5-5.0 BAAAA Turkey
O: 22MAR2023 07:44:01 37.9N 21.1E ML=3.9 EMSC SOUTHERN GREECE
P: 23MAR2023 151789 37.0N 21.0E 3.0-4.7 AAAAA No. Greece
O: 23MAR2023 02:09:34 40.4N 20.8E ML=3.7 EMSC ALBANIA
O: 23MAR2023 03:30:40 40.4N 20.7E mb=4.4 EMSC ALBANIA
O: 23MAR2023 01:43:20 40.5N 20.7E mb=4.8 EMSC ALBANIA
P: 24MAR2023 151789 39.0N 21.0E 3.0-4.6 ABAAA No. Greece
P: 25MAR2023 151858 40.0N 23.0E 3.0-5.3 AABAA Romania/NW Turkey
O: 22MAR2023 14:50:34 47.4N 6.9E ML=4.4 EMSC SWITZERLAND
P: 26MAR2023 151827 45.0N 7.0E 3.0-5.3 BCAAA Austria
SOUTHWEST PACIFIC
O: 23MAR2023 05:52:22 10.7S 164.6E Mw=5.2 EMSC SANTA CRUZ ISLANDS REGION
P: 23MAR2023 151926 11.0S 164.0E 4.0-5.4 AAAAA Vanuatu Islands
OCEAN RIDGES
O: 23MAR2023 03:37:56 42.6S 82.6W mb=4.7 EMSC WEST CHILE RISE
O: 23MAR2023 02:56:56 42.8S 82.4W Mw=5.1 EMSC WEST CHILE RISE
P: 12MAR2023 151663 43.0S 83.0W 4.0-5.4 CAAAA Chile Rise
ZEALANDIA AND AUSTRALIA REGION
O: 22MAR2023 14:16:46 30.3S 177.2W mb=5.5 EMSC KERMADEC ISLANDS, NEW ZEALAND
P: 22MAR2023 151949 30.0S 176.0W 4.0-5.4 AAAAA No. Kermadec Islands
P: 23MAR2023 151953 31.0S 178.0W 4.0-5.6 AAAAA So. Kermadec Islands
O: 22MAR2023 23:23:09 32.8S 139.6E mb=4.9 EMSC NEAR COAST OF SOUTH AUSTRALIA
JAPAN AND KURIL ISLANDS
O: 22MAR2023 19:32:30 37.0N 141.3E ML=3.9 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 23MAR2023 151790 37.0N 139.0E 3.5-4.9 AABAA No. Honshu, Japan
O: 22MAR2023 08:23:45 40.3N 143.0E mb=4.3 EMSC OFF EAST COAST OF HONSHU, JAPAN
O: 22MAR2023 07:36:59 40.3N 143.1E Mw=5.6 EMSC OFF EAST COAST OF HONSHU, JAPA
P: 17MAR2023 151551 40.0N 143.0E 3.5-5.6 BAAAA Hokkaido, Japan
P: 26MAR2023 151833 40.0N 142.0E 3.5-5.4 BAAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 22MAR2023 13:50:43 33.0N 115.5W Ml=2.3 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151521 32.8N 116.0W 2.5-4.6 AAAAA So. California
O: 22MAR2023 19:44:50 32.8N 115.5W Ml=2.2 EMSC SOUTHERN CALIFORNIA
O: 22MAR2023 11:15:57 32.8N 115.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 21MAR2023 151803 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 22MAR2023 15:25:24 35.7N 117.6W Ml=2.1 EMSC SOUTHERN CALIFORNIA
O: 22MAR2023 23:09:36 35.5N 117.4W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151526 35.0N 117.7W 2.5-4.9 AAAAA So. California
O: 23MAR2023 04:53:38 35.5N 118.4W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 22MAR2023 151811 35.6N 118.4W 2.5-4.7 AAAAA So. California
O: 22MAR2023 21:10:10 37.3N 121.7W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 25MAR2023 151770 37.3N 121.6W 2.5-4.6 BAAAA Central California
O: 23MAR2023 03:38:53 36.7N 121.3W Md=3.4 ANSS CENTRAL CALIFORNIA
P: 21MAR2023 151769 36.7N 121.4W 2.5-4.6 AAAAA Central California
NEIC reported this earthquake of M 3.4 in Central California was felt with intensity II-III in the area(s) of Central California in Gonzales, Hollister, Salinas, San Juan Bautista, Marina, Carmel Valley, Monterey, Carmel.
O: 23MAR2023 00:23:15 38.1N 122.0W Md=2.5 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 24MAR2023 151770 38.0N 122.3W 2.5-4.6 AAAAA Central California
NEIC reported this earthquake of M 2.5 in the San Francisco California was felt with intensity II-III in the area(s) of San Francisco California in Pittsburg and Gustine.
O: 22MAR2023 18:12:19 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 24MAR2023 151771 38.8N 122.8W 2.5-4.6 AAAAA Central California
O: 22MAR2023 07:45:09 39.4N 122.9W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 19MAR2023 151568 40.0N 123.0W 2.5-4.7 BAAAA Northern California
ALASKA
O: 22MAR2023 14:34:04 58.1N 137.5W ml=3.7 EMSC SOUTHEASTERN ALASKA
O: 22MAR2023 09:59:13 58.2N 137.5W MB=4.3 ECAN of Sitka, Alaska, USA
O: 22MAR2023 14:34:04 58.2N 137.5W MB=4.2 ECAN of Sitka, Alaska, USA
O: 22MAR2023 09:59:13 58.2N 137.5W mb=4.0 EMSC SOUTHEASTERN ALASKA
P: 22MAR2023 151887 57.0N 138.0W 3.0-4.4 ABAAA Southeast Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 23MAR2023 01:45:25 47.8N 120.9W Ml=2.2 EMSC WASHINGTON
O: 22MAR2023 22:08:00 47.8N 120.9W ML=2.8 EMSC WASHINGTON
P: 16MAR2023 151584 47.7N 120.3W 2.0-3.9 CAAAA Washington state, U.S.
NEIC reported this earthquake of M 2.6 in Washington State was felt with intensity II-III in the area(s) of Washington State in Leavenworth, Cashmere, Wenatchee, Black Diamond and Seattle.
O: 22MAR2023 17:42:28 53.3N 133.0W ML=3.2 EMSC QUEEN CHARLOTTE ISLANDS REGION
O: 22MAR2023 17:42:28 53.3N 133.0W MB=3.2 ECAN of Village of Queen Charlotte, BC
P: 22MAR2023 151875 54.0N 134.0W 3.0-5.4 AAAAA British Colombia
ROCKY MOUNTAINS REGION
O: 22MAR2023 13:40:22 28.6N 98.3W ML=2.2 EMSC SOUTHERN TEXAS
P: 27MAR2023 151754 28.0N 98.0W 3.0-4.7 BAAAA Northern Mexico
O: 22MAR2023 17:18:49 35.7N 104.8W ML=2.5 EMSC NEW MEXICO
P: 21MAR2023 151801 35.4N 101.8W 2.0-4.4 AACAA SW U.S.A
P: 29MAR2023 151775 37.1N 104.7W 2.0-4.2 CBAAA Colorado area
NEIC reported this earthquake of M 2.5 in New Mexico was felt with intensity II-III in the area(s) of New Mexico in Santa Fe and Tucumcari.
O: 23MAR2023 06:57:06 44.5N 107.7W ML=2.8 EMSC WYOMING
P: 28MAR2023 151830 41.9N 108.7W 2.0-3.9 BCAAA Colorado area
EASTERN U.S./CANADA
O: 22MAR2023 13:40:22 28.6N 98.3W ML=2.2 EMSC SOUTHERN TEXAS
P: 27MAR2023 151754 28.0N 98.0W 3.0-4.7 BAAAA Northern Mexico
O: 22MAR2023 14:06:49 50.1N 66.1W MB=3.6 ECAN of Maliotenam, QC, felt
P: 11MAR2023 151549 49.0N 66.0W 2.0-4.4 CBAAA E. of Maine
P: 11MAR2023 151559 49.3N 67.5W 2.0-4.4 CAAAA Maine
O: 21MAR2023 20:49:25 48.2N 69.4W MB=1.9 ECAN of Trois-Pistoles, QC
O: 21MAR2023 23:10:54 47.7N 70.1W MB=0.7 ECAN of La Malbaie, QC
P: 19MAR2023 151564 47.3N 70.5W 2.0-4.4 AAAAA New England
HAWAII
No earthquakes of M>=3 were located in Hawaii.
NEW MOON BRINGS STRONG SEISMIC ENHANCEMENT
EARTHQUAKE SUMMARY FOR MARCH 21, 2023
The new moon today was closely associated with a strong M 6.5 in Afghanistan and an M 5.6 in Central Chile near Valparaiso. These events occurred within about an hour of the new moon and were probably triggered by strong associated tidal stresses. Seismicity seems strongly triggered by this new moon and moderately large to large earthquakes, especially near these events in Chile and Central Asia should be expected in the next two days.
An M 6.5 earthquake shook Afghanistan and Pakistan today. NEIC reported
the quake was felt with maximum intensity VII in Dir, North-West Frontier, Pakistan with V in Bat Khela, Qurgoonteppa, Tordher, IV in Khorug, Tall, Tordher; in Afghanistan at Qundoz, Falzabad, Badahsan and in Tajikistan at Qurgonteppa, Obigarm, Karotegin. More than 200 people were hospitalized - mostly from shock - but at least 9 were also killed in this intermediate focus earthquake. Because the focus was at an intermediate depth (165 km) damage
on the surface was minimal and included many homes and buildings in Pakistan and Afghanistan downed by the intensity of the shaking. Some were crushed by falling debris. In Islamabad, buildings cracked resulting in mass evacuations. Power was out in many areas and highways were blocked by landslides. This earthquake occurred near local solar midnight and within about an hour of the new moon at a longitude near that of maximum tidal stress with this new moon as previously published in this summary:
"The new moon will arrive on March 21, 2023 at 17:23 UT. Longitudes which are sub-solar (local solar noon) are near 83 West longitude while those at local solar midnight are centered near 97 East longitude. In the west these include area of Central and northwestern South America and eastern U.S. and in the east areas of western Indonesia, Myanmar, and eastern China. These areas are most likely to see tidal triggering with this new moon. A moderately large to large tidally triggered earthquake is considered moderately likely with this new moon." (March 17-21, 2023)
The mainshock was preceded by an M 4.0 foreshock within minutes of local solar noon which was probably promoted by strong tidal stresses with the new moon as well. The last earthquake of equal or greater magnitude within about 250 km of this epicenter occurred on April 10, 2016 - an aftershock of the M 7.5 of October 26, 2015. At the time of the M 6.6 in April, 2016 this summary noted in this regard:
"A series of earthquakes today hit at 103 degrees from the earthquakes of M 6.6-7.0 which occurred on April 3, 6 and 7, 2016. The largest of these events was an M 6.6 in Hindu Kush, Afghanistan but others occurred in Mexico with M 5.6 and in Oklahoma. An unusual earthquake in western Nebraska of M 3.2 today was also located at 102 degrees from Vanuatu. Seismic energy from large earthquakes directed into the earth arrives at the core-mantle boundary which reflects and refracts this energy. The reflected and refracted returns to the surface within a degree or two of 103 degrees from the mainshock epicenter (depending on the depth of the mainshock and the far field location). This is the edge of the seismic shadow zone between about 103 and 144 degrees where little seismic energy returns to the surface. The concentration of this energy near 103 degrees can help trigger seismicity in seismic zones at 103 and 144 degrees from the mainshock. This summary has adhered to this position since its inception and has noted hundreds of examples of this type of seismic triggering." (April 10, 2016)
The mention of the earthquake in Nebraska at 103 degrees from this event reminds that an unusual earthquake in Nebraska (at 103 degrees from today's epicenter also occurred on March 17 with M 2.9 and was noted in this summary as:
"An M 2.9 in Nebraska today could be a precursor to a stronger earthquake along the western boundary of the North American Plate." (March 17, 2023)
and
"Today's event in Nebraska is located at 101-102 degrees from the M 7.0 in the Kermadec Islands of March 16, 2023 and may have been promoted by energy from that source" (March 17, 2023)
Forecasts 151495 and 151779 had expected enhanced seismicity within about
100 km was likely around March 18 and 25. This event is located at 141 degrees from the M 6.8 of January 20 in Argentina and at the third node (120 degrees) from the recent major earthquakes in Tonga and Fiji and the Kermadec Islands and at 103 degrees from the M 7.0 in Vanuatu of January 8, 2023 and the M 6.4 off northern California of December 20, 2022 and may have been promoted by energy from that source.
O: 21MAR2023 16:47:24 36.5N 71.0E Mw=6.5 EMSC HINDU KUSH REGION, AFGHANISTAN
O: 21MAR2023 07:25:46 36.9N 71.0E mb=4.0 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 18MAR2023 151495 37.0N 72.0E 3.8-5.2 BAAAA Hindu Kush/Pakistan
P: 23MAR2023 151779 36.0N 69.0E 3.8-5.3 AABAA Hindu Kush/Pakistan
P: 25MAR2023 151779 37.0N 70.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
Less than an hour after the earthquake in Pakistan/Afghanistan an M 5.6 shook the region of Valparaiso, Chile. NEIC reported it was felt in Valparaiso at San Antonio, Quilpue, Limache, and V in Villa Alemana and in Metropolitana at Santiago, San Bernardo, Lampa, Penaflor, Melipilla with lesser shaking in Valparaiso. This earthquake occurred within minutes of local solar noon and within minutes of the new moon. Seismic enhancement at this time and longitude had been expected with this new moon in previous issues of this summary (see above).
An M 5.5 earthquake hit west of this epicenter on December 10, 2022 but the last event in Valparaiso, Chile of greater magnitude was an M 5.7 on November 3, 2021 but the last event of significantly larger size within about 200 km of today's event occurred on August 1, 2019 about 150 km southwest of today's epicenter on August 1, 2019. At the time of the January 24, 2021 event this summary noted in this regard:
"An earthquake of M 5.8 was also felt widely in the Santiago area of Central Chile today. NEIC reported maximum intensity V in Graneros, O'Higgins with IV ikn the Santiago, Chile area at Puente Alto, Lampa, Paine, Penaflor, Talagante and III in San Bernardo, Buin and San Felipe, Valparaiso. A foreshock to the east in Mendoza, Argentina of M 4.2 was felt with intensity III in Mendoza and Corrientes, Argentina. Large earthquakes in this area of Chile occur almost exclusively to the west of this epicenter by about 150+ km. The last earthquake within about 150 km of this epicenter with M>=5.8 as an M 6.4 on June 16, 2000." (January 24, 2021)
Forecast 151946 had expected today's earthquake in Valparaiso, Chile was likely within about 100 km around March 23, 2023. This event is located at 144 degrees from the M 7.2 in the Molucca area of January 18 and at the fourth node (90 degrees) from the M 6.4 off Northern California of December 20, 2022 and may have been promoted by energy from that source.
O: 21MAR2023 17:38:13 33.6S 71.3W Mw=5.6 EMSC VALPARAISO, CHILE
P: 23MAR2023 151946 33.0S 72.0W 4.0-5.8 AAAAA Central Chile
An unusual earthquake of M 4.9-5.0 also occurred today in northeastern Siberia,
Russia. It was not reported felt. The only events within about 300 km of this epicenter in the past 35 years was an M 5.0 on March 19, 2023 and an M 4.8 on October 9, 2021. This is a co-mainshock with that event. Neither of these earthquakes were reported felt. Forecast 151902 had expected today's event within about 150 km was likely around March 21.
O: 21MAR2023 17:23:33 63.3N 158.5E mb=4.9 EMSC MAGADANSKAYA OBLAST', RUSSIA
P: 21MAR2023 151902 62.0N 158.0E 3.5-4.9 AAAAA North of Kamchatka
The strongest earthquake in the U.S. or Canada today was an M 4.5 aftershock of the M 6.4 quake of December 20, 2022 off the coast of northern California.
NEIC reported this earthquake was felt with intensity IV in northern California in Ferndale, Loleta, Fortuna, Rio Dell, III in Hydesville, Eureka, Petrolia, Scotia, Samoa, Eureka and as far as San Jose, California and Olympia, Washington. The only aftershock of larger magnitude since the mainshock of December 20 was an M 5.4 on January 1, 2023. This event was discussed in this summary at the time as:
"An M 5.4 aftershock of the M 6.4 in Northern California of December 20, 2022 was widely felt with additional damage today. NEIC reported maximum intensity VII in Rio Dell with VI in Scotia, Carlotta, Redcrest, Hydesville, V in Petrolia, Ferndale and Fortuna and IV in Myers Flat and Kneeland. It was reported felt as far as Nevada, Southern California, Washington and Oregon and British Columbia with intensity up to IV. The quake occurred near local solar noon and may have been promoted by SFE and/or tidal stresses which maximize near this hour." (January 1, 2023)
Forecast 151852 had expected today's event within about 25 km was likely around
March 22, 2023. This event is located at 102 degrees from the M 6.5 in Afghanistan today and the recent major earthquakes in Turkey and Tajikistan and may have been promoted by energy from that source.
O: 21MAR2023 23:18:20 40.6N 124.4W Mw=4.5 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 22MAR2023 151852 40.7N 124.6W 2.5-4.6 AAAAA Off Coast of No. Calif
An unusual earthquake of M 4.4 also occurred today in western Greenland. This event near local solar midnight may have been promoted by strong tidal stresses with today's new moon as it occurred near the longitude of maximum stress with that alignment. This is an unusually large earthquake for this region. Two earthquakes of M>=4.6 have occurred within about 400 km of this epicenter in the past 35 years - an M 4.9 on January 22, 2001 and an M 4.7 near this epicenter on April 6, 2016. At the time this summary noted:
"The strongest earthquake in North America today occurred as an M 4.7 in the area of Western Greenland near Aasiaat. This earthquake was not reported felt in this remote area, part of the Baffin and Davis Straits seismic zone. The is the strongest earthquake within about 250 km of this epicenter in this zone in at least the past 25 years." (April 6, 2016)
Forecast 151613 had expected today's event within about 25 km was likely around March 17 while forecast 151892 had expected it about 200 km to the south around March 21, 2023. This activity is at the third node (120 degrees) from recent large earthquakes in Tonga/Fiji and the Vanuatu Islands and may have been promoted by energy from those sources.
O: 21MAR2023 06:56:56 68.9N 53.4W MB=4.7 ECAN of Qeqertasuaq, GL
P: 17MAR2023 151613 69.0N 53.0W 2.5-4.0 BAAAA Baffin/Davis Strait Canada
P: 21MAR2023 151892 67.0N 54.0W 2.5-4.2 ABAAA Baffin/Davis Strait Canada
A series of moderate earthquakes in the Atlantic Basin joined the event in Greenland today. The strongest of these was an M 5.3 in the South Sandwich Islands which was not reported felt in this area. It had been anticipated in forecasts 151964 and 151965 within about 150 km of this epicenter to occur around March 21-25. This event occurred near local solar midnight and may have been promoted by strong tidal stresses with today's new moon.
O: 22MAR2023 02:25:30 59.7S 26.2W mb=5.3 EMSC SOUTH SANDWICH ISLANDS REGION
P: 21MAR2023 151964 58.0S 25.0W 4.0-5.9 ABAAA So. Sandwich Islands
P: 25MAR2023 151965 61.0S 26.0W 4.0-5.8 BBAAA Southern Ocean
The other moderate earthquakes in the Atlantic today occurred in the Northern Mid-Atlantic with M 4.9, 5.0, 5.0. These were not felt in this remote area. The last earthquake of M>=5 within about 200 km of these epicenters was recorded on January 10, 2022 with M 6.0. Today's events may be aftershocks, the strongest to date of the January, 2022 event. Forecast 151468 had expected today's activity within about 50 km was likely around March 18. This activity is located at 141 degrees from the M 6.9 and 7.0 in the Kermadec Islands of March 4 and March 16 and may have been promoted by energy from those sources.
O: 21MAR2023 20:46:54 28.4N 43.6W mb=5.0 EMSC NORTHERN MID-ATLANTIC RIDGE
O: 21MAR2023 20:41:08 28.6N 43.6W mb=4.9 EMSC NORTHERN MID-ATLANTIC RIDGE
O: 21MAR2023 20:49:21 28.6N 43.7W mb=5.0 EMSC NORTHERN MID-ATLANTIC RIDGE
P: 18MAR2023 151468 29.0N 44.0W 4.0-5.8 BAAAA Mid-Atlantic Ridge
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: 21MAR2023 21:27:29 29.7N 104.7E mb=4.2 EMSC EASTERN SICHUAN, CHINA
P: 23MAR2023 151753 26.0N 101.0E 4.0-5.6 ACCAA Myanmar
O: 21MAR2023 16:47:24 36.5N 71.0E Mw=6.5 EMSC HINDU KUSH REGION, AFGHANISTAN
O: 21MAR2023 07:25:46 36.9N 71.0E mb=4.0 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 18MAR2023 151495 37.0N 72.0E 3.8-5.2 BAAAA Hindu Kush/Pakistan
P: 23MAR2023 151779 36.0N 69.0E 3.8-5.3 AABAA Hindu Kush/Pakistan
P: 25MAR2023 151779 37.0N 70.0E 3.8-5.4 BAAAA Hindu Kush/Pakistan
O: 21MAR2023 17:23:33 63.3N 158.5E mb=4.9 EMSC MAGADANSKAYA OBLAST', RUSSIA
P: 21MAR2023 151902 62.0N 158.0E 3.5-4.9 AAAAA North of Kamchatka
INDONESIA AND PHILIPPINES
O: 21MAR2023 14:40:30 2.4N 128.8E mb=4.9 EMSC HALMAHERA, INDONESIA
P: 27MAR2023 151682 2.0N 129.0E 4.0-5.4 CAAAA Halmahera
O: 21MAR2023 19:32:42 2.5S 140.7E mb=4.5 EMSC NEAR N COAST OF PAPUA, INDONES
P: 27MAR2023 151705 3.0S 143.0E 4.0-5.4 CABAA Papua New Guinea
NEIC reported this earthquake of M 4.5 in Papua, Indonesia was felt with intensity IV in the area(s) of Papua, Indonesia in Jaya Pura.
O: 22MAR2023 02:15:29 3.6S 131.2E mb=4.5 EMSC CERAM SEA, INDONESIA
P: 25MAR2023 151713 5.0S 130.0E 4.0-5.4 BBBAA West Irian, PNG
O: 21MAR2023 13:46:19 4.1N 128.7E ML=4.5 EMSC NORTH OF HALMAHERA, INDONESIA
O: 21MAR2023 11:21:14 4.3N 127.8E ML=4.0 EMSC KEPULAUAN TALAUD, INDONESIA
P: 23MAR2023 151686 5.0N 126.0E 4.0-5.6 AABAA Mindanao, Philippines
O: 21MAR2023 20:37:55 6.5S 130.2E mb=4.4 EMSC BANDA SEA
P: 25MAR2023 151713 5.0S 130.0E 4.0-5.4 BBAAA West Irian, PNG
O: 22MAR2023 04:28:14 6.8N 126.2E mb=4.8 EMSC MINDANAO, PHILIPPINES
P: 22MAR2023 151677 7.0N 126.0E 4.0-5.5 AAAAA Central Philippines
NEIC reported this earthquake of M 4.8 in Mindanao, Philippines was felt with intensity II-III in the area(s) of Mindanao, Philippines in Mati and Davao.
O: 21MAR2023 09:00:48 7.7S 127.5E mb=4.4 EMSC KEPULAUAN BARAT DAYA, INDONESI
P: 22MAR2023 151690 6.0S 128.0E 4.0-5.4 ABAAA Banda Sea
O: 22MAR2023 01:24:13 7.8S 106.9E ML=4.4 EMSC JAVA, INDONESIA
P: 22MAR2023 151707 7.0S 106.0E 4.0-5.5 AAAAA So. of Java
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 22MAR2023 00:43:53 15.4N 94.3W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
P: 22MAR2023 151718 15.0N 95.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 22MAR2023 02:24:20 15.4N 95.7W ML=4.2 EMSC OFFSHORE OAXACA, MEXICO
O: 22MAR2023 05:11:04 15.4N 95.7W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
O: 21MAR2023 23:37:37 15.9N 96.4W ML=4.2 EMSC OAXACA, MEXICO
P: 24MAR2023 151735 15.0N 96.0W 3.5-5.4 BAAAA Oaxaca, Mexico
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 BAAAA Chiapas, Mexico
O: 22MAR2023 05:59:27 17.5N 94.7W ML=4.0 EMSC VERACRUZ, MEXICO
P: 17MAR2023 151435 18.0N 95.0W 3.5-5.2 BAAAA Chiapas, Mexico
O: 21MAR2023 20:43:19 18.2N 101.8W ML=4.0 EMSC GUERRERO, MEXICO
P: 21MAR2023 151731 18.0N 102.0W 3.5-5.6 AAAAA Michoacan, Mexico
O: 21MAR2023 18:33:02 18.6N 73.3W ML=3.5 EMSC HAITI REGION
P: 25MAR2023 151739 19.0N 73.0W 3.4-5.4 BAAAA Puerto Rico
O: 21MAR2023 22:09:20 19.1N 66.3W Md=3.1 EMSC PUERTO RICO REGION
P: 22MAR2023 151744 20.0N 66.0W 3.0-5.0 AAAAA Bahamas/No. Caribbean
O: 21MAR2023 11:05:28 19.5N 102.5W ML=4.0 EMSC MICHOACAN, MEXICO
P: 21MAR2023 151731 18.0N 102.0W 3.5-5.6 ABAAA Michoacan, Mexico
O: 21MAR2023 17:38:13 33.6S 71.3W Mw=5.6 EMSC VALPARAISO, CHILE
P: 23MAR2023 151946 33.0S 72.0W 4.0-5.8 AAAAA Central Chile
AFRICA AND EUROPE
O: 22MAR2023 00:01:09 24.4N 33.3E ML=4.0 EMSC EGYPT
P: 11MAR2023 151458 19.0N 39.0E 3.0-5.2 CCCAA Sudan
O: 21MAR2023 17:49:51 38.0N 37.6E ML=4.0 EMSC CENTRAL TURKEY
P: 27MAR2023 151820 38.0N 38.0E 3.5-5.0 CAAAA Turkey
O: 22MAR2023 04:51:00 45.5N 26.3E ML=3.8 EMSC ROMANIA
P: 24MAR2023 151860 46.0N 25.0E 3.0-5.0 AAAAA Romania/NW Turkey
O: 21MAR2023 16:56:41 65.8N 17.7W ML=3.5 EMSC ICELAND
P: 21MAR2023 151901 66.0N 17.0W 3.0-4.6 AAAAA Iceland area
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 21MAR2023 11:30:37 19.8S 170.2E mb=4.7 EMSC VANUATU
P: 23MAR2023 151928 19.0S 168.0E 4.0-5.6 AABAA Vanuatu Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 22MAR2023 02:25:30 59.7S 26.2W mb=5.3 EMSC SOUTH SANDWICH ISLANDS REGION
P: 21MAR2023 151964 58.0S 25.0W 4.0-5.9 ABAAA So. Sandwich Islands
P: 25MAR2023 151965 61.0S 26.0W 4.0-5.8 BBAAA Southern Ocean
O: 21MAR2023 20:46:54 28.4N 43.6W mb=5.0 EMSC NORTHERN MID-ATLANTIC RIDGE
P: 18MAR2023 151468 29.0N 44.0W 4.0-5.8 BAAAA Mid-Atlantic Ridge
O: 21MAR2023 20:41:08 28.6N 43.6W mb=4.9 EMSC NORTHERN MID-ATLANTIC RIDGE
O: 21MAR2023 20:49:21 28.6N 43.7W mb=5.0 EMSC NORTHERN MID-ATLANTIC RIDGE
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: 22MAR2023 01:46:41 29.3N 130.4E mb=4.7 EMSC RYUKYU ISLANDS, JAPAN
P: 19MAR2023 151498 31.0N 131.0E 3.5-4.9 BBAAA Kyushu, Japan area
O: 22MAR2023 03:19:15 33.3N 137.8E mb=4.2 EMSC NEAR S. COAST OF HONSHU, JAPAN
P: 21MAR2023 151774 33.0N 138.0E 3.5-5.1 AAAAA Central/So. Honshu Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 21MAR2023 17:36:32 30.7N 116.2W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 22MAR2023 151802 30.8N 116.3W 2.5-4.6 AAAAA So. California
O: 21MAR2023 17:30:16 31.5N 115.6W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO
P: 21MAR2023 151803 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 21MAR2023 08:15:16 32.4N 115.2W Ml=2.0 EMSC BAJA CALIFORNIA, MEXICO
P: 21MAR2023 151803 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 21MAR2023 23:24:40 33.5N 116.7W Ml=2.3 EMSC SOUTHERN CALIFORNIA
O: 22MAR2023 03:21:34 33.5N 116.6W Ml=2.6 EMSC SOUTHERN CALIFORNIA
O: 21MAR2023 20:47:34 33.5N 116.7W Ml=2.1 EMSC SOUTHERN CALIFORNIA
P: 26MAR2023 151804 33.4N 116.7W 2.5-4.6 BAAAA So. California
NEIC reported this earthquake of M 2.6 in Southern California was felt with intensity II-III in the area(s) of Southern California in Rancho Mirage.
O: 21MAR2023 15:45:42 33.5N 118.3W Ml=2.3 EMSC SAN PEDRO CHANNEL, CALIFORNIA
P: 22MAR2023 151806 34.0N 118.7W 2.5-4.7 AAAAA So. California
O: 22MAR2023 02:05:52 35.1N 119.0W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 24MAR2023 151809 34.7N 119.0W 2.5-4.6 AAAAA So. California
O: 21MAR2023 23:11:16 36.7N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 21MAR2023 151769 36.7N 121.4W 2.5-4.6 AAAAA Central California
O: 21MAR2023 19:41:23 38.0N 122.9W Md=2.5 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 24MAR2023 151770 38.0N 122.3W 2.5-4.6 BAAAA Central California
NEIC reported this earthquake of M 2.5 in Central California was felt with intensity II-III in the area(s) of Central California in San Francisco, Oakland, and Sam Ramon.
O: 21MAR2023 17:32:57 38.4N 122.8W MD=2.4 EMSC NORTHERN CALIFORNIA
P: 26MAR2023 151771 38.5N 122.7W 2.5-4.6 BAAAA Central California
O: 22MAR2023 05:49:22 38.8N 122.8W Md=2.0 EMSC NORTHERN CALIFORNIA
O: 21MAR2023 18:18:31 38.8N 122.8W Md=2.8 EMSC NORTHERN CALIFORNIA
P: 24MAR2023 151771 38.8N 122.8W 2.5-4.6 BAAAA Central California
NEIC reported this earthquake of M 2.8 in Northern California was felt with intensity II-III in the area(s) of Northern California in Kelseyville, Calistoga, Boonville.
O: 21MAR2023 23:18:20 40.6N 124.4W Mw=4.5 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 22MAR2023 151852 40.7N 124.6W 2.5-4.6 AAAAA Off Coast of No. Calif
O: 22MAR2023 06:56:30 41.9N 119.6W ml=2.0 EMSC NEVADA
P: 22MAR2023 151828 40.5N 119.5W 2.5-4.8 ABAAA California/Nevada area
P: 22MAR2023 151828 41.3N 118.7W 2.5-4.8 AAAAA California/Nevada area
ALASKA
O: 21MAR2023 15:57:12 53.1N 172.4E mb=4.3 EMSC NEAR ISLANDS, ALEUTIAN ISLANDS
P: 22MAR2023 151882 53.0N 171.0E 4.0-5.6 AAAAA Near Islands
O: 21MAR2023 09:13:31 56.9N 158.1W ML=3.0 EMSC ALASKA PENINSULA
P: 14MAR2023 151588 54.8N 158.7W 3.5-4.9 CCAAA Alaska Peninsula
O: 22MAR2023 02:22:40 62.0N 146.8W ML=3.6 EMSC CENTRAL ALASKA
P: 27MAR2023 151897 61.3N 147.2W 3.2-4.9 BAAAA Central Alaska
NEIC reported this earthquake of M 3.5 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska in Talkeetna, Willow, Matanuska-Susitna Borough, Wasilla, Chugiak, Anchorage and Eagle River.
O: 22MAR2023 03:40:24 62.1N 150.4W ml=3.5 EMSC CENTRAL ALASKA
P: 23MAR2023 151900 62.9N 150.2W 3.2-5.3 AAAAA Central Alaska
NEIC reported this earthquake of M 3.4 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska in Glennallen.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 22MAR2023 01:18:26 43.6N 128.2W ML=3.3 EMSC OFF COAST OF OREGON
P: 23MAR2023 151854 43.9N 128.4W 3.0-4.7 AAAAA Off Coast of Oregon
NEIC reported this earthquake of M 3.3 off the coast of Oregon was felt with intensity II-III in the area(s) of Oregon in Port Orford and Rockaway Beach.
O: 21MAR2023 15:16:10 56.1N 116.6W ML=2.9 EMSC ALBERTA, CANADA
P: 22MAR2023 151871 56.0N 116.0W 2.0-4.1 AAAAA Alberta
O: 21MAR2023 18:16:20 50.1N 129.6W MB=3.2 ECAN of Port Alice, BC
P: 21MAR2023 151865 49.9N 130.2W 2.8-5.1 AAAAA Vancouver Island area
ROCKY MOUNTAINS REGION
No earthquakes of M>=2 were located in the Rocky Mountain region today.
EASTERN U.S./CANADA
O: 21MAR2023 23:40:37 28.7N 98.3W ML=2.0 EMSC SOUTHERN TEXAS
O: 21MAR2023 13:04:24 28.6N 98.3W ML=2.2 EMSC SOUTHERN TEXAS
P: 27MAR2023 151754 28.0N 98.0W 3.0-4.7 CAAAA Northern Mexico
O: 21MAR2023 09:50:44 36.6N 89.6W Md=2.0 EMSC SOUTHEASTERN MISSOURI
P: 23MAR2023 151787 36.0N 89.0W 2.0-4.3 AAAAA New Madrid area
O: 21MAR2023 23:10:54 47.7N 70.1W MB=0.7 ECAN of La Malbaie, QC
O: 21MAR2023 20:49:25 48.2N 69.4W MB=1.9 ECAN of Trois-Pistoles, QC
O: 21MAR2023 10:17:54 47.5N 69.9W MB=2.0 ECAN of Saint-Pascal, QC
P: 19MAR2023 151564 47.3N 70.5W 2.0-4.4 AAAAA New England
O: 21MAR2023 06:56:56 68.9N 53.4W MB=4.7 ECAN of Qeqertasuaq, GL
P: 17MAR2023 151613 69.0N 53.0W 2.5-4.0 BAAAA Baffin/Davis Strait Canada
P: 21MAR2023 151892 67.0N 54.0W 2.5-4.2 ABAAA Baffin/Davis Strait Canada
HAWAII
No earthquakes of M>=3 were located in Hawaii.
MODERATELY STRONG QUAKES IN COSTA RICA AND ROMANIA
EARTHQUAKE SUMMARY FOR MARCH 20, 2023
A moderately strong earthquake of M 5.5 was widely felt in the region of Costa Rica today. NEIC reported maximum intensity IV in Costa Rica in Puntarenas at Quepos, and in San Jose in Mercedes, Santiago and San Isidro with III shaking in Parrita, Palmares, Daniel Flores, Tobosi, Paraiso, and Escazu. A regional foreshock of M 4.4 was felt with intensity III in San Jose, Costa Rica at San Rafael and Sabanilla. This event was probably promoted by strong tidal stresses associated with today's new moon as it occurred at the longitude of maximum tidal stress with this alignment as noted in this and previous issues of this summary:
"The new moon will arrive on March 21, 2023 at 17:23 UT. Longitudes which are sub-solar (local solar noon) are near 83 West longitude while those at local solar midnight are centered near 97 East longitude. In the west these include area of Central and northwestern South America and eastern U.S. and in the east areas of western Indonesia, Myanmar, and eastern China. These areas are most likely to see tidal triggering with this new moon. A moderately large to large tidally triggered earthquake is considered moderately likely with this new moon." (March 17-21, 2023)
The M 5.5 in Costa Rica today is the strongest earthquake in Costa Rica within about 150 km of this epicenter since an M 6.0 on August 24, 2020. At the time this summary noted in this regard:
"The last earthquake in Costa Rica with M>=6.0 within about 200 km of today's epicenter occurred as an M 6.5 on November 13, 2017. Events of M 6.0-6.2 occurred about 250 km to the southeast of today's epicenter on June 26 and May 12, 2019 and on August 17, 2018." (August 24, 2020)
Forecast 151433 had expected today's event within about 50 km was likely around
March 20, 2023. This activity is at 144-146 degrees from the M 7.6 in the Banda Sea of January 9, 2023 and the M 7.2 in Molucca of January 18 and may have been promoted by energy from those sources..
O: 21MAR2023 01:44:15 9.5N 84.2W Mw=5.5 EMSC COSTA RICA
O: 21MAR2023 03:54:30 9.6N 84.0W ML=4.0 EMSC COSTA RICA
P: 20MAR2023 151433 10.0N 84.0W 3.5-5.6 AAAAA Caribbean Sea
An M 4.9 aftershock was also widely felt today in southern Romania. NEIC reported maximum intensity IV in Barna, Timis and Targu, Jiu Gorj, Romania. Lesser shaking of II-III was felt in Romania at Danesti, Lupeni, Sarmizegetusa, Simeria, Deva, Hunedoara, Craiova, Dragasani, Dolj and Valcea and in Negotin, Serbia. This is the strongest aftershock to date of the M 5.6 in Romania of February 14, 2023. Forecast 151860 had expected today's event within about 15 km was likely in Romania around March 21, 2023. This epicenter is at 103 degrees from the M 6.9 in Ecuador of March 18, 2023 and was probably promoted by energy from those sources. An M 4.4 today in Greece was similarly located with respect to Ecuador.
O: 20MAR2023 14:02:16 45.1N 23.1E ML=4.9 EMSC ROMANIA
P: 21MAR2023 151860 45.0N 23.0E 3.0-5.0 AAAAA Romania/NW Turkey
An M 3.8 in eastern Romania occurred within minutes of local solar midnight and may have been promoted by tidal stresses which maximize near this hour. Forecast 151577 and 151860 had expected this activity in mid-March.
O: 20MAR2023 21:49:26 45.5N 26.4E ML=3.8 EMSC ROMANIA
P: 16MAR2023 151577 46.0N 27.0E 3.0-4.9 BAAAA Romania/NW Turkey
P: 24MAR2023 151860 46.0N 25.0E 3.0-5.0 BAAAA Romania/NW Turkey
The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Fox Islands, Aleutians. NEIC reported it was felt with intensity IV in the Fox Islands in Nikolski. The last earthquake in the Fox Islands within about 200 km of this epicenter with M>=4.9 was an M 4.9 on December 5, 2022 and prior to that an M 5.5 on November 21, 2022. At the time of that event this summary noted:
"The last earthquake in the Fox Islands within about 200 km of today's epicenter was an M 6.6 and 6.8 on January 11, 2022. At the time this summary noted in this regard:
"Strong earthquakes of M 6.8 and M 6.4 shook the region of the Fox Islands, Aleutians, Alaska today. NEIC reported the M 6.8 was felt with intensity VI in Nikolski; IV in Dutch Harbor, Unalaska, False Pass and II-III in Akutan, Atka, Cold Bay, and Adak, Alaska. The M 6.4 aftershock was reported with intensity IV in Nikolski, Alaska and III in Unalaska. An aftershock of M 5.8 was also reported felt with intensity IV in Nikolski and Dutch Harbor, Alaska. The last earthquake within about 250 km of this epicenter in the Fox Islands with M>=6.8 was an M 6.9 on July 27, 2015 about 150 km west of today's epicenter." (January 11-12, 2022, November 21, 2022)
Forecast 151599 and 151879 had expected today's event was likely within about 100 km of this epicenter around March 18-21.
O: 20MAR2023 23:25:28 53.9N 169.8W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 18MAR2023 151599 52.4N 169.4W 3.5-5.0 AAAAA Fox Islands, Aleutians
P: 21MAR2023 151879 52.7N 169.2W 3.5-5.0 AAAAA Fox Islands, Aleutians
An unusual earthquake of M 4.4 also occurred today in western Greenland. This event near local solar midnight may have been promoted by strong tidal stresses with today's new moon as it occurred near the longitude of maximum stress with that alignment. This is an unusually large earthquake for this region. Two earthquakes of M>=4.6 have occurred within about 400 km of this epicenter in the past 35 years - an M 4.9 on January 22, 2001 and an M 4.7 near this epicenter on April 6, 2016. At the time this summary noted:
"The strongest earthquake in North America today occurred as an M 4.7 in the area of Western Greenland near Aasiaat. This earthquake was not reported felt in this remote area, part of the Baffin and Davis Straits seismic zone. The is the strongest earthquake within about 250 km of this epicenter in this zone in at least the past 25 years." (April 6, 2016)
Forecast 151613 had expected today's event within about 25 km was likely around March 17 while forecast 151892 had expected it about 200 km to the south around March 21, 2023. This activity is at the third node (120 degrees) from recent large earthquakes in Tonga/Fiji and the Vanuatu Islands and may have been promoted by energy from those sources.
O: 21MAR2023 06:56:56 69.1N 53.4W mb=4.6 EMSC WESTERN GREENLAND
P: 17MAR2023 151613 69.0N 53.0W 2.5-4.0 BAAAA Baffin/Davis Strait Canada
P: 21MAR2023 151892 67.0N 54.0W 2.5-4.2 ABAAA Baffin/Davis Strait Canada
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: 21MAR2023 01:45:20 23.5N 121.5E Mw=5.2 EMSC TAIWAN
O: 21MAR2023 01:45:19 23.7N 121.3E ML=5.3 TAI Hualien, Taiwan
O: 21MAR2023 01:46:12 23.6N 121.3E ML=4.4 TAI Hualien, Taiwan
P: 24MAR2023 151760 23.0N 122.0E 4.0-5.4 BAAAA Taiwan
CWB reported this earthquake was felt with intensity IV in Hualien, III in Nantou and Taitung, II in Yunlin, Taichung, Yilan, Changhua, Chiayi, Kaohsiung, Tainan, Pingtung, I in Taipei, Hsincu, Taoyuan, Miaoli Counties, Taiwan.
The aftershock of M 4.4 was felt with intensity IV in Hualien, II in Nantou and I in Taitung, Yunlin, Taichung, Yilan Counties, Taiwan.
NEIC reported this earthquake of M 5.2 in Taiwan was felt with intensity II-III in the area(s) of Taiwan in Hualien, Changhua, Taipei Counties.
O: 20MAR2023 18:38:08 44.3N 81.1E mb=4.5 EMSC NORTHERN XINJIANG, CHINA
P: 19MAR2023 151556 42.0N 83.0E 4.0-5.4 ACBAA Kirgizstan/Xinjiang
O: 21MAR2023 05:02:22 53.2N 159.8E ML=4.1 EMSC NEAR EAST COAST OF KAMCHATKA
P: 22MAR2023 151877 54.0N 160.0E 4.0-5.7 AAAAA E. of Kamchatka
INDONESIA AND PHILIPPINES
O: 21MAR2023 01:21:16 3.5N 97.8E ML=3.3 EMSC NORTHERN SUMATRA, INDONESIA
P: 22MAR2023 151688 2.0N 98.0E 4.0-5.4 ABAAA So. Sumatera
O: 20MAR2023 18:56:09 5.4S 147.0E mb=4.4 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 23MAR2023 151702 6.0S 148.0E 4.0-5.5 BAAAA New Ireland
NEIC reported this earthquake of M 4.4 in New Guinea was felt with intensity II-III in the area(s) of New Guinea in Kainantu, Eastern Highlands.
O: 20MAR2023 21:13:28 7.4N 123.8E mb=4.5 EMSC MINDANAO, PHILIPPINES
P: 30MAR2023 151677 7.0N 124.0E 4.0-5.4 CAAAA Central Philippines
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 20MAR2023 10:20:56 2.7S 81.2W ML=4.4 EMSC NEAR COAST OF ECUADOR
P: 27MAR2023 151695 3.0S 80.0W 4.0-5.4 CAAAA Ecuador
O: 21MAR2023 01:44:15 9.5N 84.2W Mw=5.5 EMSC COSTA RICA
O: 21MAR2023 03:54:30 9.6N 84.0W ML=4.0 EMSC COSTA RICA
P: 20MAR2023 151433 10.0N 84.0W 3.5-5.6 AAAAA Caribbean Sea
O: 20MAR2023 14:11:30 10.6N 86.4W ML=4.0 EMSC OFF COAST OF COSTA RICA
O: 20MAR2023 07:09:18 10.9N 86.5W mb=4.4 EMSC OFF COAST OF COSTA RICA
P: 20MAR2023 151449 11.0N 86.0W 3.5-5.3 AAAAA Nicaragua
O: 21MAR2023 00:58:08 13.8N 92.1W ML=4.3 EMSC OFFSHORE GUATEMALA
P: 19MAR2023 151439 15.0N 92.0W 3.5-5.2 ABAAA Guatemala
O: 20MAR2023 19:01:06 16.2S 74.0W ML=4.8 EMSC NEAR COAST OF SOUTHERN PERU
P: 24MAR2023 151912 15.0S 73.0W 4.0-5.5 BBAAA Central Peru
O: 20MAR2023 10:09:58 17.4N 94.7W ML=4.1 EMSC VERACRUZ, MEXICO
O: 20MAR2023 09:38:51 16.8N 94.9W ML=4.3 EMSC OAXACA, MEXICO
P: 25MAR2023 151719 16.0N 95.0W 3.5-5.5 BAAAA Chiapas, Mexico
O: 20MAR2023 09:28:14 17.0N 101.6W ML=4.1 EMSC OFFSHORE GUERRERO, MEXICO
P: 23MAR2023 151730 18.0N 101.0W 3.5-5.6 BAAAA Michoacan, Mexico
O: 21MAR2023 02:14:00 18.1N 98.8W ML=4.0 EMSC PUEBLA, MEXICO
P: 18MAR2023 151453 19.0N 99.0W 3.5-5.3 BAAAA Oaxaca, Mexico
O: 20MAR2023 13:39:54 18.3S 70.4W mb=4.3 EMSC OFFSHORE TARAPACA, CHILE
O: 21MAR2023 01:24:51 18.2S 71.3W ML=4.0 EMSC OFF COAST OF TARAPACA, CHILE
P: 18MAR2023 151651 20.0S 70.0W 4.0-5.4 BBAAA So. Peru/Bolivia
O: 20MAR2023 10:34:41 18.5N 66.7W ML=3.5 EMSC PUERTO RICO REGION
O: 21MAR2023 04:16:22 19.0N 67.2W Md=3.3 EMSC PUERTO RICO REGION
P: 21MAR2023 151738 18.0N 68.0W 3.4-5.4 AAAAA Puerto Rico
AFRICA AND EUROPE
O: 20MAR2023 15:40:34 37.3N 36.7E mb=4.1 EMSC CENTRAL TURKEY
P: 23MAR2023 151820 38.0N 36.0E 3.5-5.1 BAAAA Turkey
O: 20MAR2023 20:42:45 38.0N 37.8E ML=4.2 EMSC CENTRAL TURKEY
O: 21MAR2023 03:45:29 38.2N 37.5E ML=4.1 EMSC CENTRAL TURKEY
O: 20MAR2023 09:57:09 38.0N 37.3E ML=4.5 EMSC CENTRAL TURKEY
O: 20MAR2023 17:47:21 38.0N 38.5E ML=3.8 EMSC EASTERN TURKEY
P: 27MAR2023 151820 38.0N 38.0E 3.5-5.0 CAAAA Turkey
O: 21MAR2023 00:20:14 39.0N 21.2E ML=4.5 EMSC GREECE
P: 18MAR2023 151502 39.0N 20.0E 3.0-4.4 BAAAA No. Greece
P: 24MAR2023 151789 39.0N 21.0E 3.0-4.6 BAAAA No. Greece
NEIC reported this earthquake of M 4.5 in Greece was felt with intensity II-III in the area(s) of Greece in Nidrion, Levkas and Larisa.
O: 20MAR2023 14:02:16 45.1N 23.1E ML=4.9 EMSC ROMANIA
P: 21MAR2023 151860 45.0N 23.0E 3.0-5.0 AAAAA Romania/NW Turkey
O: 20MAR2023 21:49:26 45.5N 26.4E ML=3.8 EMSC ROMANIA
P: 16MAR2023 151577 46.0N 27.0E 3.0-4.9 BAAAA Romania/NW Turkey
P: 24MAR2023 151860 46.0N 25.0E 3.0-5.0 BAAAA Romania/NW Turkey
SOUTHWEST PACIFIC
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 21MAR2023 06:56:56 69.1N 53.4W mb=4.6 EMSC WESTERN GREENLAND
P: 17MAR2023 151613 69.0N 53.0W 2.5-4.0 BAAAA Baffin/Davis Strait Canada
P: 21MAR2023 151892 67.0N 54.0W 2.5-4.2 ABAAA Baffin/Davis Strait Canada
O: 20MAR2023 11:57:15 56.2S 27.9W mb=5.1 EMSC SOUTH SANDWICH ISLANDS REGION
P: 16MAR2023 151672 57.0S 27.0W 4.0-6.0 BAAAA So. Sandwich Islands
P: 24MAR2023 151962 56.0S 27.0W 4.0-6.2 BAAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 21MAR2023 01:54:29 35.3S 178.7E ML=3.7 EMSC OFF E. COAST OF N. ISLAND, N.Z
P: 22MAR2023 151950 35.0S 179.0E 3.0-4.4 AAAAA North Island, N.Z.
O: 20MAR2023 15:48:27 38.0S 176.7E mb=4.1 EMSC NORTH ISLAND OF NEW ZEALAND
P: 22MAR2023 151951 38.0S 177.0E 3.0-4.6 AAAAA North Island, N.Z.
NEIC reported this earthquake of M 4.1 in the Bay of Plenty, North Island, New Zealand was felt with intensity II-III in the area(s) of the Bay of Plenty, North Island, New Zealand in Kawerau, Whakatane, Te Puke.
JAPAN AND KURIL ISLANDS
O: 20MAR2023 07:08:27 29.9N 142.3E mb=4.9 EMSC IZU ISLANDS, JAPAN REGION
P: 23MAR2023 151794 31.0N 142.0E 4.0-5.4 BAAAA Off East Coast Honshu
O: 20MAR2023 12:06:20 36.1N 142.2E mb=4.6 EMSC OFF EAST COAST OF HONSHU, JAPA
P: 23MAR2023 151790 37.0N 139.0E 3.5-4.9 BABAA No. Honshu, Japan
O: 20MAR2023 21:28:39 42.4N 142.9E ML=4.6 EMSC HOKKAIDO, JAPAN REGION
P: 25MAR2023 151833 43.0N 145.0E 3.5-5.6 BABAA Hokkaido, Japan
O: 21MAR2023 04:58:05 47.6N 153.5E mb=4.7 EMSC KURIL ISLANDS
P: 12MAR2023 151580 48.0N 153.0E 3.5-5.4 CAAAA So. Kurils
P: 24MAR2023 151863 46.0N 154.0E 3.5-5.6 BBAAA So. Kurils
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 20MAR2023 21:09:50 31.4N 115.4W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO
O: 20MAR2023 18:52:53 31.2N 115.5W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
P: 22MAR2023 151802 30.8N 116.3W 2.5-4.6 AAAAA So. California
O: 20MAR2023 11:33:28 31.9N 116.2W Ml=2.3 EMSC BAJA CALIFORNIA, MEXICO
O: 20MAR2023 12:40:10 32.7N 115.5W ML=2.0 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151521 32.8N 116.0W 2.5-4.6 AAAAA So. California
P: 21MAR2023 151803 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 20MAR2023 22:07:58 34.0N 116.9W Ml=2.1 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151520 33.9N 116.9W 2.5-4.6 AAAAA So. California
O: 20MAR2023 07:28:45 34.8N 116.3W ML=2.6 EMSC SOUTHERN CALIFORNIA
P: 18MAR2023 151524 34.6N 116.7W 2.5-4.8 AAAAA So. California
NEIC reported this earthquake of M 2.6 in Southern California was felt with intensity II-III in the area(s) of Southern California in White Water.
O: 21MAR2023 06:09:10 35.8N 121.2W Md=2.4 EMSC CENTRAL CALIFORNIA
P: 21MAR2023 151797 35.7N 121.2W 2.5-4.6 AAAAA Off So. California
O: 20MAR2023 08:23:13 37.2N 121.3W Md=2.0 EMSC NORTHERN CALIFORNIA
O: 20MAR2023 16:09:39 37.3N 121.7W ML=2.8 EMSC NORTHERN CALIFORNIA
P: 16MAR2023 151485 37.1N 121.5W 2.5-4.7 BAAAA Central California
P: 25MAR2023 151770 37.3N 121.6W 2.5-4.6 BAAAA Central California
NEIC reported this earthquake of M 3.0 near San Jose, California was felt with intensity II-III in the area(s) near San Jose, California in San Jose, Mount Hamilton, Morgan Hill among others.
O: 20MAR2023 17:21:04 37.5N 118.0W ml=2.4 EMSC CENTRAL CALIFORNIA
O: 20MAR2023 22:09:54 37.4N 118.6W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 20MAR2023 151482 37.8N 118.2W 2.5-4.4 AAAAA California/Nevada area
O: 20MAR2023 07:18:33 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 18MAR2023 151487 38.9N 122.8W 2.5-4.4 AAAAA Central California
O: 20MAR2023 07:42:28 41.8N 126.0W ML=2.8 EMSC OFF COAST OF NORTHERN CALIFORN
P: 18MAR2023 151570 42.5N 126.8W 3.0-4.6 AAAAA Off Coast of Oregon
ALASKA
O: 20MAR2023 23:25:28 53.9N 169.8W mb=4.9 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 18MAR2023 151599 52.4N 169.4W 3.5-5.0 AAAAA Fox Islands, Aleutians
P: 21MAR2023 151879 52.7N 169.2W 3.5-5.0 AAAAA Fox Islands, Aleutians
O: 20MAR2023 12:11:23 60.1N 153.4W ML=3.6 EMSC SOUTHERN ALASKA
P: 19MAR2023 151615 60.3N 153.0W 3.2-5.0 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
No events of M>=2 were located in the northwestern U.S. or western Canada today.
ROCKY MOUNTAINS REGION
O: 20MAR2023 10:38:34 31.6N 104.4W ML=2.2 EMSC WESTERN TEXAS
P: 18MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 20MAR2023 10:00:29 32.8N 100.6W ML=2.0 EMSC WESTERN TEXAS
P: 17MAR2023 151514 32.6N 101.6W 2.0-4.0 BAAAA SW U.S.A
O: 21MAR2023 00:34:36 44.5N 115.2W ML=2.6 EMSC SOUTHERN IDAHO
P: 23MAR2023 151839 44.4N 115.1W 2.0-4.1 AAAAA Montana/Idaho
EASTERN U.S./CANADA
O: 21MAR2023 06:56:56 69.1N 53.4W mb=4.6 EMSC WESTERN GREENLAND
P: 17MAR2023 151613 69.0N 53.0W 2.5-4.0 BAAAA Baffin/Davis Strait Canada
P: 21MAR2023 151892 67.0N 54.0W 2.5-4.2 ABAAA Baffin/Davis Strait Canada
O: 20MAR2023 23:47:16 35.2N 97.7W ML=2.1 EMSC OKLAHOMA
P: 16MAR2023 151533 35.0N 97.0W 2.0-3.9 BAAAA Southern Plains
HAWAII
O: 20MAR2023 16:26:32 19.2N 155.5W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII
P: 19MAR2023 151440 19.9N 156.1W 3.0-4.8 AAAAA Hawaii
NEIC reported this earthquake of M 3.0 in Hawaii was felt with intensity II-III in the area(s) of Hawaii in Naalehu, Captain Cook, Kailua Kona and Mililani.
ODERATE EARTHQUAKE STRIKES KENAI PENINSULA, ALASKA
EARTHQUAKE SUMMARY FOR MARCH 19, 2023
The strongest earthquake in the world today was an M 5.4 in Southern Alaska. NEIC reported it was felt with intensity V in Alaska at Anchor Point, Homer, Ninilchik, IV in Kenai National Wildlife Refuge and III in Clam Gulch, Kasilof, Soldotna, Sterling, Cooper Landing, Kenai, Anchorage, Girdwood, Iliamna, Fort Richardson, Eagle River, Willow, Wasilla, Chugiak, Palmer and Valdez. This is the largest earthquake within about 200 km of this epicenter in the Kenai Peninsula of Alaska since an M 5.8 about 100 km southwest of today's epicenter on May 27, 2019. At the time this summary noted in this regard:
“The strongest earthquake in the world today was an M 5.8 in the Kodiak Island region of Southern Alaska. NEIC reported intensity IV in Homer and Anchor point and II-III in Ninilchik, Pedro Bay, Kodiak Kenai NTL, Kasilof, Soldotna and Sterling, Alaska among others. This is the strongest earthquake in the Kodiak area within about 150 km of this epicenter since an M 7.1 to the north on January 24, 2016." (May 27, 2019)
An M 5.9 at intermediate depth also occurred about 200 km northwest of today's epicenter in the Kenai Peninsula on December 21, 2021. At the time this
summary noted:
"The strongest earthquake in the world today occurred in the Kenai area of Southern Alaska with M 5.9. NEIC reported maximum intensity V in southern Alaska at West Kenai, and IV in Anchor Point, Ninilchik, Calm Gulch, Kasilof, Soldotna, Homer, Sterling, Pedro Bay and North Lake among other communities in southern Alaska. This earthquake occurred on a day when the Wolf Sunspot number was the highest since the last solar active period six years ago
...
The last earthquake of larger magnitude within about 200 km of today's event occurred about 50 km south of today's epicenter on January 24, 2016 with M 7.1 and prior to that an M 6.2 on July 29, 2015. Both of these events were associated with strong solar outbursts. Today's earthquake occurred within minutes of local solar noon (like the M 7.2 in Northern California yesterday) and was likely promoted by strong tidal and geomagnetic stresses which maximize near this hour." (December 21, 2021)
Forecasts 151615 and 151893 had expected today's activity around March 19-21 within about 50-150 km of this epicenter. This epicenter is at the fourth node (90 degrees) from the recent earthquakes of M 6.9 and 7.0 in the Kermadec Islands and may have been promoted by energy from those sources. Other activity at this distance from the Kermadec Islands today included events in Colorado, Texas, Queen Charlotte Island, Guerrero, Mexico.
O: 19MAR2023 15:06:26 59.6N 151.9W Mw=5.4 EMSC KENAI PENINSULA, ALASKA
P: 19MAR2023 151615 60.3N 153.0W 3.2-5.0 AAAAA Central Alaska
P: 21MAR2023 151893 59.5N 151.2W 3.2-4.9 AAAAA Central Alaska
This earthquake may have been precursed by a light earthquake in Nebraska on March 17, 2023 as noted in this summary:
An M 2.9 in Nebraska today could be a precursor to a stronger earthquake along the western boundary of the North American Plate. NEIC reported this earthquake was felt with intensity III in Lawrence, Nebraska. This area often sees enhanced seismic creaking prior to such earthquakes.
and
Earthquakes in Nebraska and South Dakota often precede strong earthquakes along the western rim of North America and with a strong coming geomagnetic storm this is a possibility. ..." (July 18, 2022, March 17, 2023)
The second strongest earthquake in the world today was an M 4.9-5.0 in Southern Sumatra, Indonesia. This epicenter is near the antipode of the M 6.8 in Ecuador of March 18. Enhanced seismicity was expected at this time in this antipodal area in the previous issue of this summary as:
"The antipode of today's event in Ecuador is at 3N 100E in the Andaman Islands, India and Sumatra Indonesia which is an active seismic zone. Seismic enhancment in this area is likely." (March 19, 2023)
Forecast 151427 had expected today's earthquake in Sumatra within about 25 km of this epicenter was likely around March 18, 2023.
O: 19MAR2023 19:30:15 3.7S 101.9E mb=4.9 EMSC SOUTHERN SUMATRA, INDONESIA
O: 19MAR2023 19:30:15 3.7S 101.9E mb=5.0 BMG SOUTHERN SUMATRA, INDONESIA
P: 18MAR2023 151427 4.0S 102.0E 4.0-5.7 AAAAA So. of Sumatera
A light earthquake of M 3.8 also occurred in Southern Colorado today. NEIC reported it was felt with intensity IV in Trinidad and Aguilar and II-III in Weston, Walsenburg, Colorado and in Raton, New Mexico. The last earthquakes of larger magnitude then M 3.8 occurred on March 10, 2023 of two with M 4.3. This was unusually large magnitudes for this swarm as noted in this summary at the time:
"A moderate earthquake of M 4.3 occurred today in the area of Trinidad, southern Colorado. These were reported by NEIC to have been felt with maximum intensity IV in Colorado in Weston and in Raton, New Mexico and III in Colorado at Aguilar, Trinidad, Walsenburg, Fort Garland, Blanca and in New Mexico at Cimarron and Questa among others. This swarm which began in September, 2001 several days before the attack on 9-11-2001 of the Trade Center in New York City also is off and on and has been extensively investigated. No definitive conclusions on the cause of these earthquakes (or earth disturbances) has been found to this time. Today's M 4.3 occurred within about an hour of local solar midnight and may have been promoted by high tidal stresses. The last event in this region of M>4 was an M 5.3 on August 23, 2011 and occurred in conjunction with an M 5.8 near Washington D.C. on the same day which did extensive damage in the Washington area, including to the National Cathedral and the Washington Monument. This was also associated with one of the strongest Gamma Ray Bursts (GRB) recorded. The temporal relation is clear but the physical relation of these events is still fuzzy. The only other event of M>4.3 in this series occurred as an M 4.9-5.0 on August 10, 2005 and as an M 4.5 on September 5, 2001 with the initial start of these events. These events occur with approximate 11-year intervals and could be related to solar cycles of the same length." (March 10, 2023)
Forecast 151775 had expected today's event within about 25 km was likely around March 21, 2023.
O: 19MAR2023 11:10:10 37.3N 104.4W Mw=3.8 EMSC COLORADO
P: 21MAR2023 151775 37.3N 104.6W 2.0-4.3 AAAAA Colorado area
A light earthquake of M 2.5-2.9 along the Quebec-Ontario border of Canada was felt today. NEIC reported intensity II in L'Annunciation, and Sainte-Agathe-des-Monts, Quebec, Canada and in Colchester, Vermont. ECAN reported this event was lightly felt in the epicentral area. The last earthquake within about 100 km of this epicenter with M>=2.9 was an M 3.1 on March 29, 2020. An M 3.9 also occurred slightly further than this to the northwest on May 9, 2020. This summary noted this event at the time as:
"An earthquake of M 3.9-4.3 was also widely felt in southern Quebec, Canada today. NEIC reported intensity IV in Quebec at Ferre-Neuve, Mont-Laurier, Shawville, and II-III in Maniwaki, Pembroke, Buckingham, Ottawa, Kanata, Eganville and Chesterville. The last earthquake of M>=4.3 in southern Quebec within about 200 km of this epicenter was an M 4.4 on May 17, 2013." (May 9, 2020)
Today's earthquake is located at the third node (120 degrees) from the M 6.9 and 7.0 earthquakes in the Kermadec Islands of January 8 and March 16, 2023 and from the M 7.0 in Vanuatu of January 8, 2023 and the Solomon Islands M 7.0 of November 22, 2022 and was probably promoted by energy from those sources. Forecasts 151565 and 151846 had expected this epicenter to see active seismicity in mid-March.
O: 19MAR2023 20:38:12 46.0N 75.1W mb=2.5 EMSC SOUTHERN QUEBEC, CANADA
O: 19MAR2023 20:38:12 46.0N 75.1W MB=2.9 ECAN of Duhamel, QC, felt
P: 15MAR2023 151565 45.0N 75.0W 2.0-4.4 BAAAA New York State
P: 22MAR2023 151846 46.0N 75.0W 2.0-4.6 BAAAA New York State
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: 20MAR2023 01:49:21 27.3N 55.1E mb=4.1 EMSC SOUTHERN IRAN
P: 22MAR2023 151758 28.0N 56.0E 3.5-4.9 AAAAA So. Iran/Persian Gulf
O: 19MAR2023 08:28:47 29.6N 51.1E mb=4.5 EMSC SOUTHERN IRAN
P: 16MAR2023 151473 29.0N 53.0E 3.5-5.1 BABAA So. Iran/Persian Gulf
P: 17MAR2023 151530 31.0N 50.0E 3.8-5.3 ABAAA So. Iran
O: 19MAR2023 17:07:33 38.1N 73.4E mb=4.5 EMSC TAJIKISTAN
P: 16MAR2023 151496 38.0N 73.0E 3.8-5.5 BAAAA Hindu Kush/Pakistan
P: 21MAR2023 151780 38.0N 74.0E 3.8-5.6 AAAAA Hindu Kush/Pakistan
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 19MAR2023 22:18:38 2.8S 128.2E mb=4.8 EMSC CERAM SEA, INDONESIA
P: 23MAR2023 151694 1.0S 127.0E 4.0-5.4 BBBAA Ceram area
O: 19MAR2023 19:30:15 3.7S 101.9E mb=4.9 EMSC SOUTHERN SUMATRA, INDONESIA
O: 19MAR2023 19:30:15 3.7S 101.9E mb=5.0 BMG SOUTHERN SUMATRA, INDONESIA
P: 18MAR2023 151427 4.0S 102.0E 4.0-5.7 AAAAA So. of Sumatera
O: 20MAR2023 01:14:50 4.3N 126.4E ML=4.2 EMSC KEPULAUAN TALAUD, INDONESIA
P: 19MAR2023 151408 4.0N 125.0E 4.0-5.7 AABAA Mindanao, Philippines
P: 23MAR2023 151686 5.0N 126.0E 4.0-5.6 BAAAA Mindanao, Philippines
O: 19MAR2023 18:33:55 6.4S 103.9E ML=3.8 EMSC SOUTHWEST OF SUMATRA, INDONESI
P: 20MAR2023 151425 6.0S 105.0E 4.0-5.4 AAAAA So. of Java
O: 19MAR2023 23:36:18 7.3S 129.9E ML=4.1 EMSC KEPULAUAN BABAR, INDONESIA
P: 25MAR2023 151713 5.0S 130.0E 4.0-5.4 CCAAA West Irian, PNG
O: 19MAR2023 12:13:52 11.6S 117.9E ML=4.4 EMSC SOUTH OF SUMBAWA, INDONESIA
P: 12MAR2023 151635 11.0S 118.0E 4.0-5.5 CAAAA So. of Indonesia
CENTRAL AND SOUTH AMERICA
O: 19MAR2023 15:15:23 5.9S 75.5W ML=4.2 EMSC NORTHERN PERU
P: 18MAR2023 151422 6.0S 79.0W 4.0-5.4 AACAA No. Peru
O: 19MAR2023 14:22:30 10.6N 86.6W ML=4.4 EMSC OFF COAST OF COSTA RICA
O: 19MAR2023 14:12:31 10.8N 86.4W mb=4.5 EMSC OFF COAST OF COSTA RICA
O: 20MAR2023 07:09:18 10.9N 86.5W mb=4.4 EMSC OFF COAST OF COSTA RICA
O: 19MAR2023 09:51:58 10.6N 86.4W mb=4.5 EMSC OFF COAST OF COSTA RICA
P: 20MAR2023 151449 11.0N 86.0W 3.5-5.3 AAAAA Nicaragua
O: 19MAR2023 07:23:50 17.0N 100.4W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 17MAR2023 151446 18.0N 101.0W 3.5-5.6 AAAAA Michoacan, Mexico
O: 19MAR2023 08:14:41 17.1S 71.1W ML=4.0 EMSC NEAR COAST OF SOUTHERN PERU
P: 14MAR2023 151634 18.0S 72.0W 4.0-5.8 BAAAA So. Peru/Bolivia
P: 19MAR2023 151633 16.0S 70.0W 4.0-5.5 ABAAA So. Peru/Bolivia
O: 19MAR2023 20:32:11 18.2N 103.4W ML=4.0 EMSC OFFSHORE MICHOACAN, MEXICO
P: 21MAR2023 151731 18.0N 102.0W 3.5-5.6 AABAA Michoacan, Mexico
O: 19MAR2023 08:29:52 18.3N 67.2W Md=3.0 EMSC PUERTO RICO
P: 18MAR2023 151454 19.0N 68.0W 3.4-5.4 AAAAA Puerto Rico
AFRICA AND EUROPE
O: 19MAR2023 12:56:44 38.0N 36.5E ML=4.2 EMSC CENTRAL TURKEY
O: 19MAR2023 12:54:25 38.0N 36.5E mb=4.3 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 19MAR2023 14:59:55 64.6N 17.5W ML=3.1 EMSC ICELAND
P: 16MAR2023 151620 65.0N 18.0W 3.0-4.7 BAAAA Iceland area
O: 19MAR2023 19:59:07 71.2N 8.8W ML=2.9 EMSC JAN MAYEN ISLAND REGION
P: 13MAR2023 151626 71.0N 8.0W 3.5-5.5 CAAAA Jan Mayen Isl. area
P: 23MAR2023 151909 71.0N 8.0W 3.5-5.4 BAAAA Jan Mayen Isl. area
O: 19MAR2023 10:59:11 73.0N 6.7E mb=3.9 EMSC GREENLAND SEA
P: 21MAR2023 151908 72.0N 0.0E 3.0-4.6 AAAAA Norway
SOUTHWEST PACIFIC
O: 20MAR2023 05:08:33 15.3S 177.4W mb=4.3 EMSC FIJI REGION
P: 18MAR2023 151631 15.0S 176.0W 4.0-5.6 AAAAA Samoa Islands
O: 19MAR2023 10:45:57 17.2S 179.2W mb=4.2 EMSC FIJI REGION
P: 19MAR2023 151638 18.0S 180.0W 4.0-5.4 AAAAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 19MAR2023 11:09:03 73.2N 6.6E Mw=3.8 EMSC GREENLAND SEA
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: 20MAR2023 01:59:24 35.5N 140.9E Mw=4.6 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 21MAR2023 151796 35.0N 140.0E 4.0-5.4 AAAAA Off East Coast Honshu
NEIC reported this earthquake of M 4.6 in Southeastern Honshu, Japan was felt with intensity II-III in the area(s) of Southeastern Honshu, Japan in Chiba Prefecture.
O: 19MAR2023 11:00:30 37.8N 141.8E ML=4.1 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 17MAR2023 151531 38.0N 143.0E 4.0-5.4 AAAAA So. of Honshu
O: 20MAR2023 07:08:27 29.9N 142.3E mb=4.9 EMSC IZU ISLANDS, JAPAN REGION
P: 23MAR2023 151794 31.0N 142.0E 4.0-5.4 BBAAA Off East Coast Honshu
O: 19MAR2023 18:00:03 47.0N 150.5E mb=4.4 EMSC KURIL ISLANDS
P: 20MAR2023 151579 47.0N 146.0E 3.5-5.4 AACAA So. Kurils
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 19MAR2023 07:27:03 30.8N 116.4W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO
O: 19MAR2023 16:29:16 30.8N 116.4W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO
O: 19MAR2023 20:24:10 31.0N 115.6W ML=3.3 EMSC BAJA CALIFORNIA, MEXICO
O: 19MAR2023 10:04:50 31.3N 115.3W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
O: 19MAR2023 21:47:23 30.5N 116.1W ML=3.4 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
O: 19MAR2023 14:14:01 31.6N 115.7W Ml=2.7 EMSC BAJA CALIFORNIA, MEXICO
P: 17MAR2023 151515 30.7N 116.3W 2.5-4.8 AAAAA So. California
O: 20MAR2023 01:25:26 32.7N 115.5W Ml=2.2 EMSC SOUTHERN CALIFORNIA
P: 21MAR2023 151803 32.4N 115.8W 2.5-4.8 AAAAA So. California
O: 19MAR2023 09:53:32 35.5N 118.4W ML=2.6 EMSC CENTRAL CALIFORNIA
P: 18MAR2023 151527 35.6N 118.4W 2.5-4.8 AAAAA So. California
NEIC reported this earthquake of M 2.7 in Central California was felt with intensity II-III in the area(s) of Central California in Bodfish (IV) and Caliente.
O: 19MAR2023 22:18:01 36.1N 117.4W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 20MAR2023 151478 36.1N 118.1W 2.5-4.8 AAAAA California/Nevada area
O: 20MAR2023 02:14:22 36.1N 120.6W Md=2.3 EMSC CENTRAL CALIFORNIA
P: 21MAR2023 151797 35.7N 121.2W 2.5-4.6 AAAAA Off So. California
O: 19MAR2023 11:34:10 36.6N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 20MAR2023 04:10:07 36.5N 121.1W Md=2.0 EMSC CENTRAL CALIFORNIA
P: 18MAR2023 151484 36.7N 121.4W 2.5-4.7 AAAAA Central California
O: 20MAR2023 03:24:29 38.1N 122.2W Md=2.1 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 24MAR2023 151770 38.0N 122.3W 2.5-4.6 BAAAA Central California
NEIC reported this earthquake of M 2.5 in Northern California was felt with intensity II-III in the area(s) of Northern California in Kelseyville.
O: 19MAR2023 11:19:50 38.5N 119.5W ML=2.5 EMSC CENTRAL CALIFORNIA
P: 20MAR2023 151483 38.3N 119.3W 2.5-4.7 AAAAA California/Nevada area
O: 19MAR2023 11:35:57 38.9N 122.8W Md=2.5 EMSC NORTHERN CALIFORNIA
P: 18MAR2023 151487 38.9N 122.8W 2.5-4.4 AAAAA Central California
ALASKA
O: 19MAR2023 15:59:42 56.3N 152.3W ML=3.2 EMSC KODIAK ISLAND REGION, ALASKA
P: 25MAR2023 151903 55.0N 149.0W 3.0-5.1 CBBAA Northern Alaska
O: 20MAR2023 06:29:40 59.4N 144.8W ML=3.0 EMSC GULF OF ALASKA
P: 15MAR2023 151616 60.9N 147.4W 3.2-4.9 BBBAA Central Alaska
O: 19MAR2023 15:06:26 59.6N 151.9W Mw=5.4 EMSC KENAI PENINSULA, ALASKA
P: 19MAR2023 151615 60.3N 153.0W 3.2-5.0 AAAAA Central Alaska
P: 21MAR2023 151893 59.5N 151.2W 3.2-4.9 AAAAA Central Alaska
O: 19MAR2023 10:12:11 63.1N 151.0W mb=4.1 EMSC CENTRAL ALASKA
P: 19MAR2023 151618 63.2N 151.4W 3.2-5.1 AAAAA Central Alaska
NEIC reported this earthquake of M 3.7 in Central Alaska was felt with intensity II-III in the area(s) of Central Alaska in Matanuska-Susitna Borough, Talkeetna and Eagle River.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 17MAR2023 12:21:51 51.7N 131.1W MB=3.3 ECAN of Village of Queen Charlotte, B
P: 20MAR2023 151596 53.0N 132.0W 3.0-5.4 BBAAA British Colombia
ROCKY MOUNTAINS REGION
O: 19MAR2023 20:11:30 31.6N 104.5W ML=2.5 EMSC WESTERN TEXAS
O: 19MAR2023 09:16:07 31.7N 104.2W ML=2.2 EMSC WESTERN TEXAS
O: 19MAR2023 13:29:28 31.7N 104.4W ML=3.3 EMSC WESTERN TEXAS
O: 19MAR2023 13:39:29 31.7N 104.3W ML=2.7 EMSC WESTERN TEXAS
O: 19MAR2023 11:24:16 31.6N 104.5W ML=2.2 EMSC WESTERN TEXAS
P: 18MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 19MAR2023 11:10:10 37.3N 104.4W Mw=3.8 EMSC COLORADO
P: 21MAR2023 151775 37.3N 104.6W 2.0-4.3 AAAAA Colorado area
O: 19MAR2023 16:42:41 44.8N 111.0W Ml=2.3 EMSC YELLOWSTONE NAT. PARK, WYOMING
P: 16MAR2023 151586 44.2N 110.8W 2.0-4.3 BAAAA Yellowstone/Wyoming
EASTERN U.S./CANADA
O: 20MAR2023 03:35:41 37.0N 98.1W ML=2.5 EMSC OKLAHOMA
P: 18MAR2023 151534 37.0N 96.0W 2.0-4.2 AABAA Southern Plains
NEIC reported this earthquake of M 2.5 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma in Broken Arrow.
O: 19MAR2023 20:38:12 46.0N 75.1W mb=2.5 EMSC SOUTHERN QUEBEC, CANADA
O: 19MAR2023 20:38:12 46.0N 75.1W MB=2.9 ECAN of Duhamel, QC, felt
P: 15MAR2023 151565 45.0N 75.0W 2.0-4.4 BAAAA New York State
P: 22MAR2023 151846 46.0N 75.0W 2.0-4.6 BAAAA New York State
O: 19MAR2023 19:40:43 45.6N 77.0W MB=2.0 ECAN of Eganville, ON
P: 15MAR2023 151565 45.0N 75.0W 2.0-4.4 BABAA New York State
O: 17MAR2023 09:06:18 68.8N 69.1W MB=2.8 ECAN of Clyde River, NU
O: 17MAR2023 10:22:49 68.9N 68.9W MB=2.5 ECAN of Clyde River, NU
O: 17MAR2023 22:46:49 72.0N 75.4W MB=2.4 ECAN of Pond Inlet, NU
P: 29MAR2023 151907 73.3N 73.5W 2.5-3.9 AAAAA Baffin/Davis Strait Canada
O: 17MAR2023 07:24:07 47.5N 70.2W MB=1.2 ECAN of La Pocatière, QC
P: 19MAR2023 151564 47.3N 70.5W 2.0-4.4 AAAAA New England
HAWAII
O: 19MAR2023 08:25:34 19.2N 155.4W ML=3.2 EMSC ISLAND OF HAWAII, HAWAII
P: 15MAR2023 151440 19.0N 155.2W 3.0-4.7 BAAAA Hawaii
P: 19MAR2023 151440 19.9N 156.1W 3.0-4.8 AAAAA Hawaii
STRONG EARTHQUAKE DEADLY IN ECUADOR
EARTHQUAKE SUMMARY FOR MARCH 18, 2023
A strong M 6.7-6.8 hit the coast of Western Ecuador and northern Peru today.
NEIC reported it was felt with maximum intensity IX at Balao, Guayas, Ecuador; VIII in Naranjito; VI in Naranjal, VI in Plahyas, Guayaquil, Santa Lucia, Cuenca Azuay, V in Samborondon, Eloy Alfaro among others. Initial news reports indicate extensive but minor damage to buildings and structures with at least eleven people killed in the quake including one in Peru. Much of the damage and casualties occurred in Cuenca and Machala when walls collapsed. The epicenter was near Balao about two hours from Guayaquil. It was felt in at least 13 provinces of Ecuador. Many communities lost power and a two-story home and wharf collapsed. No tsunami was observed nor expected.
The time of this earthquake in Ecuador was within about 12 minutes of local solar noon at a longitude near the longitude of maximum tidal stress (see above) with the coming new moon. It is likely this earthquake was promoted by strong tidal stresses associated with the new moon of March 21 as noted in this and previous issues of this summary as:
"The new moon will arrive on March 21, 2023 at 17:23 UT. Longitudes which are sub-solar (local solar noon) are near 83 West longitude while those at local solar midnight are centered near 97 East longitude. In the west these include area of Central and northwestern South America and eastern U.S. and in the east areas of western Indonesia, Myanmar, and eastern China. These areas are most likely to see tidal triggering with this new moon. A moderately large to large tidally triggered earthquake is considered moderately likely with this new moon." (March 16-28, 2023)
This epicenter is also near 90 degrees (node 4) from the major earthquakes in the Kermadec Islands of March 4 and March 16 and near 103 degrees from the major quakes in Turkey of February 6 and may have been promoted by energy from those sources. A smaller event north of this in Ecuador occurred yesterday and was reported in this summary in the previous issue as:
"Seismicity also continued near 103 degrees from the Kermadec Islands today. This includes distances from the M 6.9 of March 4, 2023 and of March 16, 2023 (M 7.0). Examination of the daily earthquake map shows much of the activity near 103 degrees from the current Kermadec Islands earthquake lies on the low side of 100-103 degrees, but near the 103 distance from the first event in that region. Among earthquakes today included two of M 5.0 and 4.3 in Ecuador." (March 17-18, 2023)
O: 17MAR2023 19:19:23 0.3S 80.7W mb=4.5 EMSC NEAR COAST OF ECUADOR
P: 13MAR2023 151415 1.0S 81.0W 4.0-5.6 BAAAA Ecuador
Today's earthquake of M 6.7 is the strongest in Ecuador within about 200 km of this epicenter in at least 35 years. An M 7.5 hit about 300 km northeast of this on February 22, 2019 and another was an M 7.1 on August 12, 2010. These were both at intermediate epicenters and were felt on the surface with moderate intensity as reported on February 22, 2019:
"A major earthquake of M 7.5 (EMSC) to 7.7 (IGP) hit the coast of Ecuador today. It occurred at an intermediate depth of 132 km and was felt with moderate intensity throughout much of Ecuador. NEIC reported maximum intensity V-VII in Ecuador was felt … in general within about 1000 km from the epicenter.
IGP reported intensity V in Pastaza with an aftershock of M 5.7 felt with III in Zarumilla, Peru. Some damage was reported. News sources on the web reported
NEIC reported this aftershock at M 5.5 was felt in Ecuador with intensity V in Guayaquil, and Santa Lucia, and II-III in Ecuador at Eloy Alfara, Guayas, Cuenca Azuay, Machala, Pajan, Santa Elena, Montecristi, Banos and Manta, Ecuador. No injuries associated with the quake. This was probably due to the intermediate depth. A shallow quake would have caused considerable damage and destruction. A slightly larger quake of M 7.8 on April 16, 2016 killed more than 700 people and destroyed hundreds of buildings and cost more than $3 billion in damages. Earthquakes of this size in Ecuador can help promote seismicity in California several months later. This summary will follow this in future issues.
...
The last earthquake located within about 250 km of today's M 7.5 occurred more than 30 years ago. The only comparable event in the region in this time period was the M 7.8 off Ecuador on April 16, 2016. That event occurred about 350 km northwest of today's epicenter." (February 22, 2019)
Forecast 151415 had expected today's earthquake was likely within about 100-150 km around March 17. The antipode of today's event in Ecuador is at 3N 100E in the Andaman Islands, India and Sumatra Indonesia which is an active seismic zone. Seismic enhancement in this area is likely. A minor earthquake hit at the antipode yesterday as:
O: 17MAR2023 11:33:21 1.7N 99.1E ML=3.0 EMSC NORTHERN SUMATRA, INDONESIA
P: 17MAR2023 151410 3.0N 99.0E 4.0-5.4 ABAAA So. Sumatera
Today's mainshock is at 148 degrees from the M 7.6 of January 9, 2023 and at the third node (120 degrees) from the M 7.0 in the Solomon Islands of November 22, 2022 and at the sixth node (60 degrees) from the M 6.4 off Northern California of December 20, 2022 and may have been promoted by energy from those sources.
O: 18MAR2023 17:22:37 2.9S 79.8W ML=4.1 EMSC NEAR COAST OF ECUADOR
O: 18MAR2023 17:22:38 2.9S 80.0W ML=4.7 EPN NEAR COAST OF ECUADOR
O: 18MAR2023 17:55:33 2.9S 79.9W ML=4.0 EMSC NEAR COAST OF ECUADOR
O: 18MAR2023 17:55:33 2.8S 79.9W ML=3.8 EPN NEAR COAST OF ECUADOR
O: 19MAR2023 09:47:25 2.4S 77.0W ML=3.6 EPN NEAR COAST OF ECUADOR
O: 18MAR2023 17:12:53 2.8S 79.9W ML=6.7 EPN NEAR COAST OF ECUADOR
O: 18MAR2023 17:12:55 2.8S 79.8W Mw=6.7 EMSC NEAR COAST OF ECUADOR
P: 17MAR2023 151415 2.0S 78.0W 4.0-5.5 AABAA Ecuador
The strongest earthquake in the U.S. or Canada today was an M 4.2 in the Near Islands, Aleutians, Alaska. The last earthquakes of larger magnitude in the Near Islands occurred on February 24 and M 4.5 on January 4, 2023. Forecast 151601 had expected today's event was likely within about 100 km around March 16, 2023. This epicenter is at 103 degrees from the M 6.7 in the region of Ecuador but occurred about 8 minutes before it. The relation between these two epicenters is unclear.
O: 18MAR2023 17:04:54 52.2N 172.7E mb=4.2 EMSC NEAR ISLANDS, ALEUTIAN ISLANDS
P: 16MAR2023 151601 53.0N 171.0E 4.0-5.7 AAAAA Near Islands
Moderate earthquakes of M 3.8 and M 3.9 continued the series near Mammoth Lakes, California today. This has been discussed in previous issues of this summary as for example on March 18:
"NEIC reported an earthquake of M 3.9 in California-Nevada border was felt with intensity II-III in the area(s) of California-Nevada border in Silverpeak, Nevada. This continues a strong swarm of minor earthquakes in this area which began on March 14, 2023 with an M 3.9, the largest event in the current swarm and the largest since an M 4.8 on January 6, 2022 within about 50 km of today's epicenter. At the time of the event in January, 2022 this summary noted:
"The first event of M 4.8 near Mina, Nevada was reported by NEIC to have been felt with intensity II-III in Nevada at Luning, Silverpeak, Gabbs, Goldfield, Hawthorne, Round Mountain (IV), Tonopah (IV) and Glenbrook and in California at Bishop and Yosemite National Park. This earthquake occurred within minutes of local solar midnight and was probably promoted by high tidal stresses which maximize near this hour. This is an aftershock of the M 6.5 on May 15, 2020, the strongest aftershock in the region in more than a year - since an M 4.9 on December 12, 2020." (January 6, 2022, March 18, 2023)
Forecast 151482 had expected today's event within about 50 km was likely around March 20, 2023.
NEIC reported these earthquakes of M 3.7 and M 3.9 in California/Nevada was felt with intensity II-III in the area(s) of Nevada in Silverpeak.
O: 18MAR2023 14:23:06 37.5N 118.0W Mw=3.8 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 14:39:43 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 07:03:42 37.5N 118.0W Mw=3.9 EMSC CENTRAL CALIFORNIA
P: 20MAR2023 151482 37.8N 118.2W 2.5-4.4 AAAAA California/Nevada area
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: 19MAR2023 05:12:16 22.8N 121.1E ML=4.2 EMSC TAIWAN REGION
O: 19MAR2023 05:12:16 22.8N 121.1E ML=4.2 TAI Hualien, Taiwan
P: 20MAR2023 151474 21.0N 120.0E 4.0-5.4 ABAAA Taiwan
CWB reported this earthquake was felt with intensity III in Taitung, and I in Hualien, Kaohsiung and Pingtung Counties, Taiwan.
O: 19MAR2023 06:01:19 38.5N 73.4E ML=4.3 EMSC TAJIKISTAN
P: 16MAR2023 151496 38.0N 73.0E 3.8-5.5 BAAAA Hindu Kush/Pakistan
O: 18MAR2023 11:29:28 39.7N 69.8E mb=4.7 EMSC KYRGYZSTAN
O: 18MAR2023 11:35:22 39.7N 70.0E mb=4.3 EMSC KYRGYZSTAN
P: 16MAR2023 151496 38.0N 73.0E 3.8-5.5 ABBAA Hindu Kush/Pakistan
P: 18MAR2023 151495 37.0N 72.0E 3.8-5.2 ACBAA Hindu Kush/Pakistan
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 18MAR2023 09:06:20 1.3S 126.9E ML=4.0 EMSC KEPULAUAN SULA, INDONESIA
P: 16MAR2023 151407 2.0N 125.0E 4.0-5.4 BCBAA Mindanao, Philippines
O: 19MAR2023 06:23:26 2.5N 127.8E ML=4.5 EMSC MOLUCCA SEA
O: 18MAR2023 16:30:49 2.3N 128.9E mb=4.9 EMSC HALMAHERA, INDONESIA
O: 19MAR2023 01:25:43 2.3N 128.9E mb=4.9 EMSC HALMAHERA, INDONESIA
O: 18MAR2023 07:14:45 2.3N 128.9E mb=4.7 EMSC HALMAHERA, INDONESIA
P: 15MAR2023 151405 3.0N 129.0E 4.0-5.5 BAAAA Halmahera
O: 19MAR2023 02:45:33 3.4S 146.8E mb=4.9 EMSC BISMARCK SEA
O: 19MAR2023 03:09:07 3.6S 146.7E mb=4.7 EMSC BISMARCK SEA
O: 19MAR2023 02:55:05 3.3S 146.8E mb=4.7 EMSC BISMARCK SEA
P: 15MAR2023 151421 5.0S 146.0E 4.0-5.5 BBAAA New Ireland
O: 18MAR2023 08:50:29 5.1N 127.3E mb=4.1 EMSC PHILIPPINE ISLANDS REGION
P: 13MAR2023 151405 5.0N 127.0E 4.0-5.5 BAAAA Halmahera
O: 18MAR2023 10:05:20 7.1S 155.6E mb=4.8 EMSC SOLOMON ISLANDS
P: 17MAR2023 151428 7.0S 155.0E 4.0-5.5 AAAAA Solomon Islands
O: 18MAR2023 19:25:21 9.4S 119.0E ML=4.5 EMSC SUMBA REGION, INDONESIA
P: 20MAR2023 151429 9.0S 118.0E 4.0-5.4 AAAAA Sumbawa Island area
O: 18MAR2023 23:14:46 18.1S 178.0W mb=4.8 EMSC FIJI REGION
P: 17MAR2023 151638 18.0S 177.0W 4.0-5.6 AAAAA Tonga Islands
CENTRAL AND SOUTH AMERICA
O: 18MAR2023 17:22:37 2.9S 79.8W ML=4.1 EMSC NEAR COAST OF ECUADOR
O: 18MAR2023 17:22:38 2.9S 80.0W ML=4.7 EPN NEAR COAST OF ECUADOR
O: 18MAR2023 17:55:33 2.9S 79.9W ML=4.0 EMSC NEAR COAST OF ECUADOR
O: 18MAR2023 17:55:33 2.8S 79.9W ML=3.8 EPN NEAR COAST OF ECUADOR
O: 19MAR2023 09:47:25 2.4S 77.0W ML=3.6 EPN NEAR COAST OF ECUADOR
O: 18MAR2023 17:12:53 2.8S 79.9W ML=6.7 EPN NEAR COAST OF ECUADOR
O: 18MAR2023 17:12:55 2.8S 79.8W Mw=6.7 EMSC NEAR COAST OF ECUADOR
P: 17MAR2023 151415 2.0S 78.0W 4.0-5.5 AABAA Ecuador
O: 18MAR2023 10:07:01 15.5N 96.5W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 15MAR2023 151452 16.0N 96.0W 3.5-5.3 BAAAA Oaxaca, Mexico
O: 18MAR2023 21:17:56 4.5S 77.1W ML=4.0 EMSC NORTHERN PERU
P: 18MAR2023 151422 6.0S 79.0W 4.0-5.4 ABBAA No. Peru
O: 18MAR2023 09:42:02 18.6N 106.3W ML=4.1 EMSC OFF COAST OF JALISCO, MEXICO
P: 15MAR2023 151437 19.0N 107.0W 3.5-5.5 BAAAA Coast of Jalisco, Mexico
O: 18MAR2023 11:39:45 19.5N 73.0W ML=3.2 EMSC HAITI REGION
P: 17MAR2023 151456 20.0N 74.0W 3.4-5.3 AAAAA Puerto Rico
O: 18MAR2023 06:50:07 19.7S 66.9W ML=4.6 EMSC POTOSI, BOLIVIA
P: 15MAR2023 151642 22.0S 67.0W 4.0-5.8 BCAAA Argentina
O: 19MAR2023 00:08:09 19.8N 70.9W ML=3.4 EMSC DOMINICAN REPUBLIC
P: 13MAR2023 151456 19.0N 71.0W 3.4-5.3 CAAAA Puerto Rico
O: 18MAR2023 20:30:07 23.1S 68.9W Mw=4.6 EMSC ANTOFAGASTA, CHILE
P: 14MAR2023 151646 24.0S 69.0W 4.0-5.8 BAAAA Coast No. Chile
O: 18MAR2023 07:02:57 24.0N 108.9W ML=4.2 EMSC GULF OF CALIFORNIA
P: 13MAR2023 151463 24.0N 109.0W 3.5-5.4 BAAAA Gulf of California
O: 18MAR2023 15:41:41 33.4S 68.3W mb=5.0 EMSC MENDOZA, ARGENTINA
P: 12MAR2023 151656 32.0S 67.0W 4.0-5.6 ABAAA Central Chile
NEIC reported this earthquake of M 5.0 in Argentina was felt with intensity II-III in the area(s) of Argentina in San Martin and Mendoza.
O: 18MAR2023 16:33:32 22.3N 108.5W mb=4.4 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 10:05:53 22.4N 108.3W mb=4.2 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 13:13:44 22.4N 108.4W ML=4.4 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 19MAR2023 04:09:26 22.0N 108.8W mb=4.2 EMSC OFF COAST OF BAJA CALIFORNIA S
P: 20MAR2023 151463 20.0N 109.0W 3.5-5.1 ABAAA Gulf of California
AFRICA AND EUROPE
O: 18MAR2023 19:05:22 25.8S 29.2E ML=3.2 EMSC SOUTH AFRICA
P: 20MAR2023 151648 26.0S 28.0E 3.0-4.7 AAAAA Rep. South Africa
O: 18MAR2023 11:20:56 34.5N 13.8E ML=3.9 EMSC CENTRAL MEDITERRANEAN SEA
P: 12MAR2023 151499 35.0N 14.0E 3.0-4.6 CAAAA Mediterranean/Sicily
O: 18MAR2023 12:43:40 35.3N 35.9E ML=4.0 EMSC NEAR THE COAST OF SYRIA
P: 13MAR2023 151537 36.0N 36.0E 3.5-5.2 BAAAA Turkey
O: 18MAR2023 13:47:28 37.4N 37.2E ML=3.9 EMSC CENTRAL TURKEY
O: 18MAR2023 09:25:33 37.7N 36.5E ML=4.3 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 18MAR2023 07:55:42 38.2N 38.3E ML=4.0 EMSC EASTERN TURKEY
P: 14MAR2023 151537 38.0N 39.0E 3.5-5.1 BAAAA Turkey
O: 18MAR2023 14:22:16 42.0N 36.9E ML=3.0 EMSC BLACK SEA
O: 18MAR2023 14:23:53 42.0N 36.9E ML=2.9 EMSC BLACK SEA
P: 12MAR2023 151567 41.0N 36.0E 3.5-4.9 CAAAA No. Turkey/Black Sea
SOUTHWEST PACIFIC
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 18MAR2023 16:06:45 27.7N 18.2W ML=2.9 EMSC CANARY ISLANDS, SPAIN REGION
P: 7MAR2023 151186 28.0N 16.0W 3.0-4.5 CABAA Canary Islands
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 19MAR2023 05:27:38 31.8S 179.8E ML=4.5 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151662 32.0S 180.0E 4.0-5.4 BAAAA So. Kermadec Islands
O: 18MAR2023 21:42:39 38.1S 176.7E ML=4.3 EMSC NORTH ISLAND OF NEW ZEALAND
O: 18MAR2023 21:42:40 38.0S 176.7E MS=4.2 GEONET North Island, New Zealand
O: 19MAR2023 05:11:35 38.1S 176.7E ML=3.8 EMSC NORTH ISLAND OF NEW ZEALAND
P: 18MAR2023 151660 37.0S 178.0E 3.0-4.8 ABAAA North Island, N.Z.
GEONET reported the M 4.2 was felt by 866 people with 255 at weak intensity and 351 with light shaking and 212 with moderate intensity 44 with strong, 3 with severe and 1 with extreme intensity.
JAPAN AND KURIL ISLANDS
O: 18MAR2023 17:05:14 30.0N 141.9E mb=4.8 EMSC IZU ISLANDS, JAPAN REGION
O: 18MAR2023 15:51:42 29.9N 141.7E mb=4.4 EMSC IZU ISLANDS, JAPAN REGION
P: 16MAR2023 151462 28.0N 140.0E 4.0-5.4 ABBAA Bonin Islands
O: 18MAR2023 14:36:27 47.3N 153.1E mb=4.4 EMSC KURIL ISLANDS
P: 12MAR2023 151580 48.0N 153.0E 3.5-5.4 CAAAA So. Kurils
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 18MAR2023 10:39:39 30.6N 116.4W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 17MAR2023 151515 30.7N 116.3W 2.5-4.8 AAAAA So. California
O: 18MAR2023 10:58:31 31.3N 114.3W ML=3.5 EMSC GULF OF CALIFORNIA
P: 15MAR2023 151464 30.0N 114.0W 3.5-4.9 BBAAA Gulf of California
O: 19MAR2023 01:37:08 31.7N 115.8W Ml=2.4 EMSC BAJA CALIFORNIA, MEXICO
O: 18MAR2023 16:52:06 33.2N 115.8W Mw=3.6 EMSC SOUTHERN CALIFORNIA
O: 18MAR2023 17:19:32 33.3N 115.8W ML=3.6 EMSC SOUTHERN CALIFORNIA
P: 16MAR2023 151521 33.7N 116.1W 2.5-4.8 AAAAA So. California
P: 20MAR2023 151521 32.8N 116.0W 2.5-4.6 AAAAA So. California
NEIC reported these earthquakes of M 3.4 and 3.6 in Southern California was felt with intensity II-III in the area(s) of Southern California in Niland, Thermal, Palm Desert, Cathedral City, Calipatria, Yucca Valley, El Cajon, Orange.
O: 19MAR2023 04:28:03 34.3N 116.7W Ml=2.1 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151520 33.9N 116.9W 2.5-4.6 AAAAA So. California
O: 19MAR2023 06:14:59 35.5N 118.4W Ml=2.2 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 07:00:53 35.5N 118.4W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 18MAR2023 151527 35.6N 118.4W 2.5-4.8 AAAAA So. California
O: 18MAR2023 14:25:48 37.4N 117.6W ml=2.2 EMSC NEVADA
P: 16MAR2023 151479 37.2N 117.3W 2.5-4.8 AAAAA California/Nevada area
O: 18MAR2023 10:44:44 38.8N 122.8W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 18MAR2023 151487 38.9N 122.8W 2.5-4.4 AAAAA Central California
O: 18MAR2023 17:32:45 40.5N 124.3W Md=2.2 EMSC NORTHERN CALIFORNIA
O: 18MAR2023 18:52:35 40.4N 124.3W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 17MAR2023 151569 40.7N 124.6W 2.5-4.8 AAAAA Off Coast of No. Calif
O: 18MAR2023 14:23:06 37.5N 118.0W Mw=3.8 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 14:39:43 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 07:03:42 37.5N 118.0W Mw=3.9 EMSC CENTRAL CALIFORNIA
P: 20MAR2023 151482 37.8N 118.2W 2.5-4.4 AAAAA California/Nevada area
ALASKA
O: 18MAR2023 17:04:54 52.2N 172.7E mb=4.2 EMSC NEAR ISLANDS, ALEUTIAN ISLANDS
P: 16MAR2023 151601 53.0N 171.0E 4.0-5.7 AAAAA Near Islands
O: 18MAR2023 08:08:14 56.9N 158.1W ML=3.2 EMSC ALASKA PENINSULA
P: 14MAR2023 151588 54.8N 158.7W 3.5-4.9 BCAAA Alaska Peninsula
O: 18MAR2023 15:29:15 69.1N 144.5W ML=3.0 EMSC NORTHERN ALASKA
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
No events of M>=2 were located in the northwestern U.S. or western Canada today.
ROCKY MOUNTAINS REGION
O: 18MAR2023 19:35:55 31.7N 104.6W ML=3.0 EMSC WESTERN TEXAS
P: 18MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 18MAR2023 23:09:59 37.2N 104.7W ML=3.1 EMSC COLORADO
P: 12MAR2023 151491 37.2N 104.9W 2.0-4.0 CAAAA Colorado area
NEIC reported this earthquake of M 3.1 in Colorado was felt with intensity II-III in the area(s) of Colorado in Weston.
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.
REGIONAL SEISMIC ENHANCEMENT FOLLOWS M 7.0 KERMADEC ISLANDS EARTHQUAKE
EARTHQUAKE SUMMARY FOR MARCH 17, 2023
A series of moderate earthquakes hit North Island, New Zealand today. This included an M 5.3 and a number of events of M>=4. These were reported felt with maximum intensity V-VI in Matata, Paengaroa, Rotorua, Te Puke, Murupara, Opotiki, Tauranga, Kawerau, Edgecumbe, Rotorua and Whakatane, Bay of Plenty, New Zealand. This activity was probably triggered by energy from the M 7.0 in the Kermadec Islands to the north. The first in this series was an M 3.6 at 00:58 UT (EMSC data) on March 16, 2023 - two minutes after the M 7.0 in the Kermadec Islands at 00:56 UT. An earthquake in North Island in the Cook Strait area followed with M 4.2 three minutes after that. Although the first of these events occurred near local solar midnight, most of the events occurred near local solar noon and were probably promoted by tidal stresses which maximize near these hours. The last earthquake within about 200 km of these epicenters with M>=5.3 was an M 5.4 on November 30, 2022 and prior to that an M 5.5 on August 28, 2020. Of some interest, the event of November 30, 2022 was on the same day as the M 5.3 in Alberta, Canada, similar to the activity there yesterday. The last swarm in the area similar to today's activity occurred September 1-5, 2016 about 200 km northeast of today's epicenters. Forecast 151660 had expected this activity within about 100 km was likely around March 14-18. This activity is at 145-148 degrees from the major earthquakes in Turkey of February, 2023 and at the third node (120 degrees) from the M 7.2 in Tajikistan of February 23, 2023 and at the sixth node (60 degrees) from the M 7.2 in Molucca of January 18, 2023 and the seventh node (52 degrees) from the M 7.6 in Banda of January 9, 2023 and may have been promoted by energy from those sources.
NEIC reported the largest of these events were felt as follows:
O: 17MAR2023 15:31:06 38.1S 176.7E MS=4.7 GEONET 2120 people reported feeling this earthquake with 764 at weak intensity and 708 with light shaking and 468 with moderate intensity 156 with strong, 20 with severe and 4 with extreme intensity.
O: 17MAR2023 15:46:01 38.1S 176.7E MS=4.9 GEONET 2914 people reported feeling this earthquake with 1105 at weak intensity and 1068 with light shaking and 526 with moderate intensity 165 with strong, 44 with severe and 6 with extreme intensity.
O: 17MAR2023 19:58:07 38.1S 176.7E MS=4.8 GEONET 2770 people reported feeling this earthquake with 1216 at weak intensity and 914 with light shaking and 472 with moderate intensity 135 with strong, 29 with severe and 4 with extreme intensity.
O: 18MAR2023 00:42:06 43.7S 172.8E MS=4.9 GEONET Felt with light intensity in the area of Christchurch, New Zealand and in southern North Island. Of 6958 felt reports 2187 reports of light and 3691 of weak intensity with 998 of moderate shaking and 71 with strong 4 with severe and 7 with extreme intensity came from the area.
O: 17MAR2023 15:31:06 38.1S 176.7E MS=4.7 GEONET NORTH ISLAND, NZ.
O: 17MAR2023 15:46:01 38.1S 176.7E MS=4.9 GEONET NORTH ISLAND, NZ.
O: 17MAR2023 19:58:07 38.1S 176.7E MS=4.8 GEONET NORTH ISLAND, NZ.
O: 17MAR2023 20:52:49 38.1S 176.7E MS=4.2 GEONET NORTH ISLAND, NZ.
O: 17MAR2023 22:40:33 38.1S 176.7E MS=4.3 GEONET NORTH ISLAND, NZ.
O: 17MAR2023 19:58:07 38.1S 176.7E Mw=5.0 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 20:52:49 38.1S 176.7E ML=4.2 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 20:54:11 38.1S 176.7E ML=4.1 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 22:28:53 38.1S 176.7E ML=3.9 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 22:38:47 38.1S 176.7E ML=4.4 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 22:40:33 38.1S 176.7E ML=4.3 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 23:10:07 38.1S 176.7E ML=3.9 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 15:46:01 38.1S 176.7E Mw=5.3 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 15:31:06 38.1S 176.7E mb=4.8 EMSC NORTH ISLAND OF NEW ZEALAND
P: 14MAR2023 151660 38.0S 178.0E 3.0-4.4 BAAAA North Island, N.Z.
P: 18MAR2023 151660 37.0S 178.0E 3.0-4.8 ABAAA North Island, N.Z.
An earthquake of M 4.6 also occurred in southern South Island, New Zealand
in Milford Sound today. GEONET reported this earthquake was felt with weak intensity in the area southwest of Te Anau, South Island. 234 reports of felt intensity came from the area east and north of the epicenter with 162 weak, 67 light, 5 moderate, 0 strong, 0 severe and 0 extreme shaking. Forecast 151668 had expected this event within about 50 km was likely around March 18, 2023.
O: 17MAR2023 01:31:57 45.1S 167.6E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 17MAR2023 00:00:18 45.0S 167.5E ML=4.6 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 17MAR2023 00:00:18 45.0S 167.5E MS=4.6 GEONET South Island, New Zealand
P: 18MAR2023 151668 45.0S 168.0E 3.0-5.0 AAAAA So. Island, N.Z.
An earthquake of M 4.9 was also felt in the Canterbury area of South Island
GEONET reported this earthquake was felt with light intensity in the area of Christchurch, New Zealand and in southern North Island. Of 6958 felt reports 2187 reports of light and 3691 of weak intensity with 998 of moderate shaking and 71 with strong 4 with severe and 7 with extreme intensity came from the area. today. NEIC reported this earthquake of M 4.3 in Canterbury, South Island, New Zealand was felt with intensity II-III in the area(s) of Canterbury, South Island, New Zealand in Christchurch and Lyttelton. Forecast 151667 expected today's activity was likely in this area around March 16, 2023.
O: 18MAR2023 01:09:01 43.7S 172.9E ML=3.8 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 18MAR2023 00:42:06 43.7S 172.8E MS=4.9 GEONET South Island, New Zealand
P: 16MAR2023 151667 42.0S 173.0E 3.0-5.0 ABAAA So. Island, N.Z.
Seismicity also continued near 103 degrees from the Kermadec Islands today. This includes distances from the M 6.9 of March 4, 2023 and of March 16, 2023 (M 7.0). Examination of the daily earthquake map shows much of the activity near 103 degrees from the current Kermadec Islands earthquake lies on the low side of
100-103 degrees, but near the 103 distance from the first event in that region.
Among earthquakes today included an event in Myanmar and two of M 5.0 and 4.3 in Ecuador.
The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Gulf of Alaska. This is the strongest earthquake within about 200 km of this epicenter since an M 5.0 on May 2, 2016 and a similar M 5.0 on August 27, 2014. The last earthquake in this area of significantly larger magnitude than today's M 4.9, and the only such event in the area in the past 35 years was an M 5.6 on July 25, 2009. Forecast 151616 had expected today's event in this area was likely around March 15.
O: 17MAR2023 15:04:23 59.4N 145.0W mb=4.9 EMSC GULF OF ALASKA
P: 15MAR2023 151616 60.9N 147.4W 3.2-4.9 ABBAA Central Alaska
A moderate earthquake of M 4.3 also occurred today off the coast of Oregon. NEIC reported it was lightly felt with intensity II-III on the coast of Oregon at Gold Beach, Rockaway Beach, Seaside, Sherwood. Although a slightly smaller M 4.2 hit this area on March 9, the last earthquake of larger magnitude off the Coast of Oregon within about 200 km of today's epicenter was an M 5.0 on January 11, 2023. Today's event occurred near local solar midnight and was probably promoted by strong tidal stresses which maximize near this hour. Forecast 151571 had expected today's event in this area was likely around March 17.
"The strongest earthquake in the U.S. or Canada today was an M 5.0 off the coast of Oregon. NEIC reported it was felt with maximum intensity IV ... A foreshock of M 4.5 near the same epicenter was reported felt with light intensity in Rockaway Beach and Portland, Oregon. This activity occurred near local solar midnight and may have been promoted by high tidal stresses. ... The M 5.0 is the strongest earthquake in the area off the coast of Oregon within about 200 km of this epicenter since an M 5.1 on March 27, 2022." January 12, 2023)
O: 17MAR2023 08:16:05 43.7N 128.2W mb=4.3 EMSC OFF COAST OF OREGON
P: 17MAR2023 151571 44.4N 129.3W 3.0-4.6 AAAAA Off Coast of Oregon
NEIC reported an earthquake of M 3.9 in California-Nevada border was felt with intensity II-III in the area(s) of California-Nevada border in Silverpeak, Nevada. This continues a strong swarm of minor earthquakes in this area which began on March 14, 2023 with an M 3.9, the largest event in the current swarm and the largest since an M 4.8 on January 6, 2022 within about 50 km of today's epicenter. At the time of the event in January, 2022 this summary noted:
"The first event of M 4.8 near Mina, Nevada was reported by NEIC to have been felt with intensity II-III in Nevada at Luning, Silverpeak, Gabbs, Goldfield, Hawthorne, Round Mountain (IV), Tonopah (IV) and Glenbrook and in California at Bishop and Yosemite National Park. This earthquake occurred within minutes of local solar midnight and was probably promoted by high tidal stresses which maximize near this hour. This is an aftershock of the M 6.5 on May 15, 2020, the strongest aftershock in the region in more than a year - since an M 4.9 on December 12, 2020." (January 6, 2022)
Forecast 151482 had expected today's event within about 50 km was likely
around March 20, 2023.
O: 18MAR2023 07:03:42 37.5N 118.0W Mw=3.9 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 07:03:42 37.5N 118.0W mw=3.9 ANSS N of Deep Springs
P: 20MAR2023 151482 37.8N 118.2W 2.5-4.4 AAAAA California/Nevada area
A minor earthquake of M 3.4 occurred today in the South Atlantic Ocean off the west coast of Africa. It was not reported felt in this remote area. This is a highly unusual epicenter - no earthquakes have been reported at M>=3 within about 500 km of this epicenter in the past 35 years. Earthquakes near 500 km from this epicenter were recorded as an M 3.5 to the east on November 16, 2020 and as an M 4.8 to the west of today's epicenter. At the time of the event in November, 2020, this summary noted in this regard:
"An unusual earthquake of M 3.5 was widely felt in the Western Cape Province of South Africa today. NEIC reported it was felt with intensity IV in the Western Cape at Saldanha, Atlantic, and Bredasdorp and II-III in Mooreesburg, Malmesbury, Cape Town, Paarl, Steeenbosch, Somerset and Carnarvon. The last earthquake in the Cape area of South Africa with M>=3.5 within about 500 km of this epicenter occurred on December 31, 1994 with M 4.5 about 500 km northeast of today's epicenter, the only such regional event in the past 30 years." (November 16, 2020)
Like many other earthquakes today, this epicenter is near 100 degrees from the Kermadec Islands.
O: 17MAR2023 10:53:17 35.4S 13.4E ML=3.4 EMSC SOUTH ATLANTIC OCEAN
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: 17MAR2023 14:34:06 23.4N 93.6E ML=3.5 EMSC MYANMAR-INDIA BORDER REGION
P: 13MAR2023 151469 24.0N 94.0E 4.0-5.4 BAAAA Myanmar
O: 18MAR2023 03:33:09 26.5N 94.2E ML=3.6 EMSC ASSAM - NAGALAND REGION, INDIA
P: 19MAR2023 151469 27.0N 97.0E 4.0-5.6 AACAA Myanmar
O: 18MAR2023 06:39:55 27.3N 55.1E mb=4.2 EMSC SOUTHERN IRAN
P: 15MAR2023 151473 28.0N 56.0E 3.5-5.0 BAAAA So. Iran/Persian Gulf
O: 17MAR2023 10:39:42 30.8N 96.1E mb=5.1 EMSC EASTERN XIZANG
P: 19MAR2023 151469 27.0N 97.0E 4.0-5.6 ACAAA Myanmar
O: 18MAR2023 00:00:54 36.5N 70.0E Mw=4.9 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 15MAR2023 151495 37.0N 71.0E 3.8-5.3 BAAAA Hindu Kush/Pakistan
NEIC reported this earthquake of M 4.3 in Pakistan was felt with intensity II-III in the area(s) of Pakistan in Rawalpindi (IV), Islamabad, Abottabad and III in Dushanbe, Tajikistan.
O: 17MAR2023 18:19:10 38.3N 75.6E mb=4.7 EMSC SOUTHERN XINJIANG, CHINA
P: 16MAR2023 151496 38.0N 73.0E 3.8-5.5 AABAA Hindu Kush/Pakistan
O: 17MAR2023 08:18:26 41.9N 77.9E mb=4.0 EMSC KYRGYZSTAN
P: 17MAR2023 151555 40.0N 77.0E 4.0-5.4 ABAAA Kirgizstan/Xinjiang
INDONESIA AND PHILIPPINES
O: 17MAR2023 15:03:01 0.7S 123.7E ML=4.3 EMSC SULAWESI, INDONESIA
P: 18MAR2023 151407 0.0N 123.0E 4.0-5.4 AAAAA Mindanao, Philippines
O: 17MAR2023 11:33:21 1.7N 99.1E ML=3.0 EMSC NORTHERN SUMATRA, INDONESIA
P: 17MAR2023 151410 3.0N 99.0E 4.0-5.4 ABAAA So. Sumatera
O: 18MAR2023 07:14:40 2.3N 128.9E mb=4.7 EMSC HALMAHERA, INDONESIA
O: 18MAR2023 00:59:18 2.4N 128.9E ML=4.2 EMSC HALMAHERA, INDONESIA
P: 15MAR2023 151405 3.0N 129.0E 4.0-5.5 BAAAA Halmahera
O: 17MAR2023 19:37:59 6.0N 125.8E mb=4.7 EMSC MINDANAO, PHILIPPINES
P: 13MAR2023 151408 5.0N 126.0E 4.0-5.8 BAAAA Mindanao, Philippines
O: 17MAR2023 16:11:38 6.0N 127.0E Mw=4.8 EMSC MINDANAO, PHILIPPINES
P: 15MAR2023 151406 7.0N 127.0E 4.0-5.4 AAAAA Halmahera
O: 17MAR2023 23:42:12 6.1S 129.4E ML=4.3 EMSC BANDA SEA
P: 15MAR2023 151413 6.0S 128.0E 4.0-5.7 AAAAA Banda Sea
O: 17MAR2023 10:47:51 6.1S 147.5E mb=4.9 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 15MAR2023 151421 5.0S 146.0E 4.0-5.5 ABBAA New Ireland
O: 17MAR2023 14:15:21 7.3S 129.2E mb=4.2 EMSC KEPULAUAN BABAR, INDONESIA
O: 17MAR2023 12:32:19 7.5S 129.7E ML=4.1 EMSC KEPULAUAN BABAR, INDONESIA
O: 17MAR2023 09:28:59 6.3S 130.3E ML=4.5 EMSC BANDA SEA
P: 15MAR2023 151413 6.0S 128.0E 4.0-5.7 AABAA Banda Sea
O: 17MAR2023 21:43:16 8.4S 108.9E ML=4.2 EMSC JAVA, INDONESIA
O: 17MAR2023 12:05:30 8.8S 109.8E Mw=5.0 EMSC JAVA, INDONESIA
P: 15MAR2023 151425 8.0S 108.0E 4.0-5.4 AABAA So. of Java
NEIC reported this earthquake of M 5.0 South of Java was felt with intensity II-III in the area(s) South of Java in Gombong, Surakarta, Madiun and in Yogyakarta. Indonesia.
O: 17MAR2023 10:54:22 9.0S 119.4E ML=4.7 EMSC SUMBA REGION, INDONESIA
P: 20MAR2023 151429 9.0S 118.0E 4.0-5.4 BABAA Sumbawa Island area
O: 17MAR2023 13:56:04 14.6N 120.1E mb=4.9 EMSC LUZON, PHILIPPINES
P: 16MAR2023 151443 14.0N 121.0E 3.5-5.0 AAAAA Luzon, Philippines
NEIC reported this earthquake of M 4.9 in Central Luzon, Philippines was felt with intensity II-III in the area(s) of Central Luzon, Philippines in Olongapo, Subic, Mariveles, Hermosa and in Bacoor, Southern Tagalog.
O: 17MAR2023 14:16:47 18.5N 120.2E ML=4.1 EMSC LUZON, PHILIPPINES
O: 17MAR2023 13:23:29 18.5N 120.4E mb=4.9 EMSC LUZON, PHILIPPINES
P: 15MAR2023 151444 18.0N 120.0E 3.5-4.9 AAAAA Luzon, Philippines
NEIC reported this earthquake of M 4.9 in northern Philippines was felt with intensity II-III in the area(s) of northern Philippines in Bacoor.
CENTRAL AND SOUTH AMERICA
O: 17MAR2023 16:12:02 9.6S 78.2W ML=4.0 EMSC NEAR COAST OF NORTHERN PERU
P: 11MAR2023 151422 8.0S 78.0W 4.0-5.6 CBAAA No. Peru
P: 11MAR2023 151422 9.0S 81.0W 4.0-5.6 CACAA No. Peru
O: 18MAR2023 00:22:30 10.2N 84.1W ML=4.1 EMSC COSTA RICA
O: 18MAR2023 00:24:30 10.2N 84.1W ML=4.3 EMSC COSTA RICA
P: 20MAR2023 151433 10.0N 84.0W 3.5-5.6 AAAAA Caribbean Sea
O: 17MAR2023 08:46:25 9.7S 74.8W mb=4.3 EMSC CENTRAL PERU
O: 18MAR2023 03:41:46 10.3S 73.7W mb=4.4 EMSC CENTRAL PERU
P: 12MAR2023 151629 14.0S 73.0W 4.0-5.6 CCAAA Central Peru
O: 17MAR2023 15:33:26 10.5S 78.7W ML=4.2 EMSC NEAR COAST OF CENTRAL PERU
P: 18MAR2023 151422 6.0S 79.0W 4.0-5.4 ACAAA No. Peru
O: 17MAR2023 19:19:23 0.3S 80.7W mb=4.5 EMSC NEAR COAST OF ECUADOR
P: 13MAR2023 151415 1.0S 81.0W 4.0-5.6 BAAAA Ecuador
O: 17MAR2023 16:04:45 0.5S 78.6W ML=3.7 EMSC ECUADOR
P: 17MAR2023 151415 2.0S 78.0W 4.0-5.5 ABAAA Ecuador
O: 18MAR2023 00:36:22 14.8N 92.5W ML=4.0 EMSC OFFSHORE CHIAPAS, MEXICO
P: 16MAR2023 151434 14.0N 93.0W 3.5-5.1 AAAAA Chiapas, Mexico
P: 19MAR2023 151439 15.0N 92.0W 3.5-5.2 AAAAA Guatemala
O: 17MAR2023 18:10:40 15.8N 95.3W ML=4.0 EMSC OFFSHORE OAXACA, MEXICO
P: 15MAR2023 151452 16.0N 96.0W 3.5-5.3 AAAAA Oaxaca, Mexico
O: 18MAR2023 06:40:05 17.5N 101.2W ML=4.2 EMSC GUERRERO, MEXICO
O: 18MAR2023 03:57:25 16.9N 100.0W ML=4.2 EMSC GUERRERO, MEXICO
P: 17MAR2023 151453 17.0N 99.0W 3.5-5.5 AAAAA Oaxaca, Mexico
O: 17MAR2023 13:43:56 18.2N 73.5W ML=3.3 EMSC HAITI REGION
P: 17MAR2023 151456 20.0N 74.0W 3.4-5.3 ABAAA Puerto Rico
O: 18MAR2023 06:33:44 18.7N 106.3W ML=4.2 EMSC OFF COAST OF JALISCO, MEXICO
P: 15MAR2023 151437 19.0N 107.0W 3.5-5.5 BAAAA Coast of Jalisco, Mexico
O: 17MAR2023 07:22:32 18.9N 65.1W ML=3.3 EMSC VIRGIN ISLANDS REGION
P: 15MAR2023 151441 18.0N 64.0W 3.0-5.1 AAAAA Leeward Islands
O: 17MAR2023 07:25:44 19.6N 102.4W ML=4.0 EMSC MICHOACAN, MEXICO
P: 17MAR2023 151446 18.0N 101.0W 3.5-5.6 ABBAA Michoacan, Mexico
O: 18MAR2023 06:50:07 19.7S 66.9W ML=4.6 EMSC POTOSI, BOLIVIA
O: 18MAR2023 06:50:07 19.8S 66.9W mb=4.7 ANSS N of Colchani Bolivia
P: 19MAR2023 151646 21.0S 69.0W 4.0-5.6 ABBAA Coast No. Chile
O: 18MAR2023 04:31:27 22.3N 108.6W mb=4.5 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 00:41:24 22.4N 108.1W ML=4.4 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 03:07:22 22.4N 108.4W ML=4.3 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 01:42:14 22.7N 108.4W ML=4.4 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 01:14:08 22.9N 108.0W ML=4.3 EMSC OFF COAST OF BAJA CALIFORNIA SUR
O: 18MAR2023 01:01:01 22.2N 108.7W mb=4.2 EMSC OFF COAST OF BAJA CALIFORNIA S
P: 13MAR2023 151463 24.0N 109.0W 3.5-5.4 BBAAA Gulf of California
P: 20MAR2023 151463 20.0N 109.0W 3.5-5.1 ACAAA Gulf of California
NEIC reported this earthquake of M 3.2 in Baja California, Mexico was felt with intensity II-III in the area(s) of Baja California, Mexico in Lazaro Cardenas.
AFRICA AND EUROPE
O: 18MAR2023 01:40:06 37.8N 36.7E ML=4.2 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 17MAR2023 13:45:42 37.9N 21.3E ML=4.1 EMSC SOUTHERN GREECE
P: 18MAR2023 151502 39.0N 20.0E 3.0-4.4 ABAAA No. Greece
O: 18MAR2023 05:14:31 38.0N 36.5E ML=4.5 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 18MAR2023 02:01:50 40.0N 39.5E ML=4.0 EMSC EASTERN TURKEY
P: 20MAR2023 151538 39.0N 41.0E 3.5-5.1 AAAAA Turkey
P: 19MAR2023 151548 40.0N 41.0E 3.5-5.1 AAAAA Caucasus/Caspian Sea
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 18MAR2023 03:01:10 19.2S 179.2W Mw=5.3 EMSC FIJI REGION
P: 19MAR2023 151638 18.0S 180.0W 4.0-5.4 ABAAA Tonga Islands
P: 20MAR2023 151639 19.0S 178.0W 4.0-5.4 AAAAA Tonga Islands
O: 18MAR2023 01:14:05 21.1S 168.8E mb=4.7 EMSC LOYALTY ISLANDS
P: 17MAR2023 151647 22.0S 170.0E 4.0-5.4 AAAAA Loyalty Islands
O: 18MAR2023 00:14:46 22.2S 177.2W mb=4.5 EMSC SOUTH OF FIJI ISLANDS
P: 16MAR2023 151653 25.0S 177.0W 4.0-5.5 ACAAA Tonga Islands
O: 17MAR2023 23:43:20 23.0S 167.8E mb=4.6 EMSC NEW CALEDONIA
P: 17MAR2023 151647 22.0S 170.0E 4.0-5.4 AABAA Loyalty Islands
O: 17MAR2023 20:32:00 23.5S 176.3W ML=4.6 EMSC SOUTH OF FIJI ISLANDS
P: 16MAR2023 151653 25.0S 177.0W 4.0-5.5 ABAAA Tonga Islands
OCEAN RIDGES
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 18MAR2023 03:44:08 30.5S 176.6W mb=5.0 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151659 30.0S 177.0W 4.0-5.4 AAAAA No. Kermadec Islands
O: 18MAR2023 00:42:03 43.8S 173.1E ML=4.3 EMSC OFF E. COAST OF S. ISLAND, N.Z.
O: 18MAR2023 01:09:01 43.7S 172.9E ML=3.8 EMSC SOUTH ISLAND OF NEW ZEALAND
P: 16MAR2023 151667 42.0S 173.0E 3.0-5.0 ABAAA So. Island, N.Z.
O: 17MAR2023 19:58:07 38.1S 176.7E Mw=5.0 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 20:52:49 38.1S 176.7E ML=4.2 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 20:54:11 38.1S 176.7E ML=4.1 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 22:28:53 38.1S 176.7E ML=3.9 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 22:38:47 38.1S 176.7E ML=4.4 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 22:40:33 38.1S 176.7E ML=4.3 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 23:10:07 38.1S 176.7E ML=3.9 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 15:46:01 38.1S 176.7E Mw=5.3 EMSC NORTH ISLAND OF NEW ZEALAND
O: 17MAR2023 15:31:06 38.1S 176.7E mb=4.8 EMSC NORTH ISLAND OF NEW ZEALAND
P: 14MAR2023 151660 38.0S 178.0E 3.0-4.4 BAAAA North Island, N.Z.
P: 18MAR2023 151660 37.0S 178.0E 3.0-4.8 ABAAA North Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 17MAR2023 23:04:54 28.5N 139.8E ML=4.7 EMSC BONIN ISLANDS, JAPAN REGION
P: 16MAR2023 151462 28.0N 140.0E 4.0-5.4 AAAAA Bonin Islands
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 17MAR2023 08:35:27 30.8N 116.3W ML=3.6 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO
O: 17MAR2023 10:51:34 30.7N 116.3W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
O: 17MAR2023 09:50:59 31.2N 115.6W ML=3.4 EMSC BAJA CALIFORNIA, MEXICO
P: 17MAR2023 151515 30.7N 116.3W 2.5-4.8 AAAAA So. California
O: 17MAR2023 20:57:28 33.8N 117.0W Ml=2.0 EMSC SOUTHERN CALIFORNIA
P: 20MAR2023 151520 33.9N 116.9W 2.5-4.6 BAAAA So. California
O: 18MAR2023 07:00:53 35.5N 118.4W Ml=2.0 EMSC CENTRAL CALIFORNIA
P: 18MAR2023 151527 35.6N 118.4W 2.5-4.8 AAAAA So. California
O: 17MAR2023 07:44:51 35.6N 121.5W Md=2.6 EMSC OFFSHORE CENTRAL CALIFORNIA
P: 14MAR2023 151511 35.7N 121.2W 2.5-4.7 BAAAA Off So. California
NEIC reported this earthquake of M 2.6 in off the coast of Central California was felt with intensity II-III in the area(s) of Los Osos and Ojai, California.
O: 18MAR2023 07:03:42 37.5N 118.0W Mw=3.9 EMSC CENTRAL CALIFORNIA
O: 18MAR2023 07:03:42 37.5N 118.0W mw=3.9 ANSS N of Deep Springs
P: 20MAR2023 151482 37.8N 118.2W 2.5-4.4 AAAAA California/Nevada area
O: 17MAR2023 11:55:14 40.3N 124.5W Md=2.4 EMSC OFFSHORE NORTHERN CALIFORNIA
P: 17MAR2023 151569 40.7N 124.6W 2.5-4.8 AAAAA Off Coast of No. Calif
ALASKA
O: 17MAR2023 15:04:23 59.4N 145.0W mb=4.9 EMSC GULF OF ALASKA
P: 15MAR2023 151616 60.9N 147.4W 3.2-4.9 ABBAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 17MAR2023 08:16:05 43.7N 128.2W mb=4.3 EMSC OFF COAST OF OREGON
P: 17MAR2023 151571 44.4N 129.3W 3.0-4.6 AAAAA Off Coast of Oregon
O: 17MAR2023 10:27:15 47.8N 122.8W Ml=2.3 EMSC PUGET SOUND REGION, WASHINGTON
P: 13MAR2023 151584 47.5N 121.8W 2.0-3.9 BAAAA Washington state, U.S.
O: 16MAR2023 18:51:01 56.1N 116.6W MB=3.9 ECAN of Reno, AB
O: 16MAR2023 16:36:11 56.1N 116.7W MB=2.3 ECAN of Reno, AB
O: 16MAR2023 15:58:42 56.1N 116.7W MB=2.2 ECAN of Reno, AB
O: 16MAR2023 15:38:22 56.1N 116.7W MB=2.6 ECAN of Reno, AB
O: 16MAR2023 15:07:46 56.1N 116.7W MB=3.8 ECAN of Reno, AB
O: 16MAR2023 14:59:09 56.1N 116.6W MB=4.6 ECAN of Reno, AB
O: 16MAR2023 14:46:18 56.1N 116.7W MB=4.5 ECAN of Reno, AB
O: 16MAR2023 22:27:20 56.1N 116.6W MB=3.4 ECAN of Reno, AB
P: 16MAR2023 151589 56.0N 120.0W 2.0-4.3 AABAA Alberta
O: 17MAR2023 12:21:51 51.7N 131.1W ML=3.3 EMSC QUEEN CHARLOTTE ISLANDS REGION
O: 17MAR2023 12:21:51 51.7N 131.1W MB=3.3 ECAN of Village of Queen Charlotte, BC
P: 16MAR2023 151595 50.4N 130.2W 3.0-5.1 ABAAA British Colombia
P: 20MAR2023 151596 53.0N 132.0W 3.0-5.4 ABAAA British Colombia
O: 16MAR2023 16:45:59 57.0N 122.2W MB=2.2 ECAN of Fort St. John, BC
O: 17MAR2023 19:03:37 55.4N 121.9W ML=2.7 EMSC BRITISH COLUMBIA, CANADA
P: 16MAR2023 151589 56.0N 120.0W 2.0-4.3 AABAA Alberta
O: 17MAR2023 04:07:56 64.1N 133.2W MB=3.0 ECAN of Keno, YT
P: 17MAR2023 151624 64.3N 131.0W 2.5-4.1 AAAAA Yukon Territory, Canada
ROCKY MOUNTAINS REGION
O: 18MAR2023 00:14:24 37.2N 104.8W ML=2.3 EMSC COLORADO
P: 12MAR2023 151491 37.2N 104.9W 2.0-4.0 CAAAA Colorado area
O: 18MAR2023 06:38:27 44.3N 116.2W ML=2.6 EMSC SOUTHERN IDAHO
P: 6MAR2023 151283 44.6N 116.0W 2.0-4.1 CAAAA Montana/Idaho
P: 11MAR2023 151561 44.5N 115.2W 2.0-3.9 CAAAA Montana/Idaho
NEIC reported this earthquake of M 2.6 in Idaho was felt with intensity II-III in the area(s) of Idaho in Cascade.
O: 17MAR2023 10:56:46 31.4N 103.8W ML=2.5 EMSC WESTERN TEXAS
P: 15MAR2023 151513 32.6N 103.6W 2.0-4.0 ABAAA SW U.S.A
O: 17MAR2023 16:06:20 31.7N 104.4W ML=2.4 EMSC WESTERN TEXAS
O: 17MAR2023 12:48:36 31.6N 104.1W ML=2.1 EMSC WESTERN TEXAS
P: 18MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 18MAR2023 02:39:07 32.0N 102.3W mb=2.3 EMSC WESTERN TEXAS
O: 17MAR2023 08:40:33 32.4N 102.1W mb=2.4 EMSC WESTERN TEXAS
O: 17MAR2023 20:50:09 32.5N 101.7W mb=3.2 EMSC WESTERN TEXAS
P: 17MAR2023 151514 32.6N 101.6W 2.0-4.0 AAAAA SW U.S.A
NEIC reported this earthquake of M 3.2 in Western Texas was felt with intensity II-III in the area(s) of Western Texas in Lubbock.
EASTERN U.S./CANADA
O: 17MAR2023 07:13:24 35.2N 97.7W ML=2.2 EMSC OKLAHOMA
P: 16MAR2023 151533 35.0N 97.0W 2.0-3.9 AAAAA Southern Plains
O: 16MAR2023 23:31:06 49.2N 66.4W MB=2.5 ECAN of Sainte-Anne-des-Monts, QC
P: 11MAR2023 151559 49.3N 67.5W 2.0-4.4 BAAAA Maine
O: 17MAR2023 04:45:45 47.5N 70.2W MB=1.1 ECAN of La Pocatière, QC
O: 17MAR2023 07:24:07 47.5N 70.2W MB=1.2 ECAN of La Pocatière, QC
P: 16MAR2023 151558 47.0N 69.0W 2.0-4.2 AAAAA Maine
P: 19MAR2023 151564 47.3N 70.5W 2.0-4.4 AAAAA New England
O: 16MAR2023 05:11:12 46.6N 76.4W MB=2.0 ECAN of Grand-Remous, QC
O: 16MAR2023 05:07:53 46.6N 76.4W MB=2.2 ECAN of Maniwaki, QC
P: 15MAR2023 151565 45.0N 75.0W 2.0-4.4 ABAAA New York State
HAWAII
No earthquakes of M>=3 were located in Hawaii.
MODERATE QUAKES AT 103 DEGREES FROM KERMADEC IS IN U.S. AND CANADA
EARTHQUAKE SUMMARY FOR MARCH 16, 2023
The strongest earthquakes in the U.S. or Canada today occurred as an M 4.5, 4.8 and 5.1 in Alberta, Canada. These were reported by NEIC with intensity V in Alberta in Grimshaw and IV in Peace River with II-III shaking in Falher, High Prairie, Fairview, Valleyview, Spirit River, Slave Lake, Fox Creek, Grand Prairie, Barrhead and Athabasca. These events are apparently aftershocks of an M 5.3 which hit the same epicenter on November 30, 2022. At the time this summary noted in this regard:
"The largest earthquake in the U.S. or Canada today was an M 5.3 in Alberta, Canada. The mainshock was felt widely in Alberta with maximum intensity IV in Peace River, Falher, High Prairie, Manning, Fairview, and III in Grimshaw, Valleyview, Slave Lake, Spirit River and Sexsmith. It was followed by an aftershock of M 4.5 which was reported felt with intensity IV in Alberta at Slave Lake, Whitecourt and II-III in Peace River, High Prairie, Fairview, Grande Prairie, Athabasca, High Leven and Wood Buffalo and in Dawson Creek, British Columbia. Foreshocks of M 4.6 and 4.9 to the M 5.3 was felt in the same area as the mainshock with maximum intensity IV in Alberta at Peace River, High Prairie, Spirit River, Sexsmith, Slave Lake and in Dawson, BC. This activity is a continuation of events which hit the area on November 22-24, 2022. That included an M 4.5 which previous to the M 5.3 today was the largest earthquake in the area in more than 35 years as noted in this summary at the time:
"The strongest earthquake in the U.S. or Canada today was an M 4.5 in Alberta, Canada. This event occurred within minutes of local solar midnight and was probably promoted by strong tidal stresses with today's new moon. These maximize near local sola midnight. The mainshock was followed by an M 3.8 aftershock near Reno, Alberta. This is the strongest earthquake within about 200 km of this epicenter in Alberta, Canada in at least 35 years. Smaller quakes hit about 200 km to the south of this as an M 4.2 on January 12, 2016 and an M 4.0 on June 13, 2015." (November 30, 2022)
Forecast 151589 had expected enhanced seismicity west of today's epicenter in Alberta, Canada was likely around March 16. This activity is at 101 degrees from the recent major earthquakes in the Kermadec Islands and was likely promoted by energy from those sources. Other earthquakes at this distance from the Kermadec Islands today included an M 4.5 in Colombia, an M 4.2 in Buratiya, Russia and an M 2.9 in Nebraska.
O: 16MAR2023 14:59:09 56.1N 116.6W mb=5.0 EMSC ALBERTA, CANADA
O: 16MAR2023 15:07:46 56.1N 116.7W ML=3.8 EMSC ALBERTA, CANADA
O: 16MAR2023 14:46:17 56.1N 116.6W mb=4.8 EMSC ALBERTA, CANADA
P: 16MAR2023 151589 56.0N 120.0W 2.0-4.3 AABAA Alberta
An M 2.9 in Nebraska today could be a precursor to a stronger earthquake along the western boundary of the North American Plate. NEIC reported this earthquake was felt with intensity III in Lawrence, Nebraska. This area often sees enhanced seismic creaking prior to such earthquakes. The only earthquake of similar or larger magnitude in Nebraska within about 250 km of today's epicenter in the past three years occurred as an M 2.7 on December 7, 2022 and an M 3.7 on July 17, 2022. When the M 2.7 occurred in December 2022 this summary noted:
"Earthquakes in Nebraska often precede larger earthquakes on the Pacific-North American tectonic plate boundary. Today's event is the strongest located in Nebraska since an M 3.7 on July 17, 2022 and may be an aftershock of that event.
"An unusual M 3.7 also shook areas near the central Nebraska-Kansas border today. An unusual M 3.8 earthquake occurred on the Nebraska-Kansas border south of Lincoln and Grand Island, Nebraska near Superior. NEIC reported this earthquake of M 3.8 in Nebraska was felt with intensity IV-V in the area(s) of Nebraska at Superior, Guide Rock and in Mankato Kansas, with lesser shaking in Hardy, Red Cloud, Deshler, Glenvil, Nebraska and in Kansas at Webber, Smith Center, Republic. This is the strongest earthquake in southern Nebraska within about 150 km of this epicenter since an M 3.8 on May 6, 2021. The only event of larger magnitude in this area in the past 30 years was an M 4.5 on June 22, 2019. Earthquakes in Nebraska and South Dakota often precede strong earthquakes along the western rim of North America and with a strong coming geomagnetic storm this is a possibility. ..." (July 18, 2022)
This may be related to a series of earthquakes over the past week in northern Missouri and Illinois east of this epicenter. This has previously been reported in this summary. Forecast 148527 had expected regional seismic enhancement in late November or early December.
NEIC reported this earthquake of M 2.7 in Southern Nebraska was felt with intensity II-III in the area(s) of Southern Nebraska in Lincoln. This epicenter is at 141 degrees from the M 6.9 in Sumatra of November 18 and at 101-103 degrees from recent major earthquakes in Tonga and Fiji and may have been promoted by energy from those sources." (December 8, 2022)
Today's event in Nebraska is located at 101-102 degrees from the M 7.0 in the Kermadec Islands of March 16, 2023 and may have been promoted by energy from that source and therefore may not be related to recent or future seismicity in western U.S. however.
Forecast 151534 had expected today's event in Nebraska was likely within about 150 km of this epicenter around March 12, 2023. This epicenter is at the third node (120 degrees) from the M 7.2 in Molucca of January 18 and may have been promoted by energy from this source.
O: 17MAR2023 04:56:54 40.2N 98.3W mb=2.9 EMSC NEBRASKA
P: 12MAR2023 151534 39.0N 99.0W 2.0-4.0 BBAAA Southern Plains
Another earthquake at 103 degrees from the Kermadec Islands epicenter was an
M 4.2 in Buryatiya, Russia near the Mongolian border. The last earthquake in this region of significantly larger magnitude was an M 4.7 on April 14, 2022. These may be aftershocks of an M 5.0 in the area of August 31, 2021. Forecast 151609 had expected enhanced seismicity in southern Siberia within about 200 km of this epicenter was likely around March 16-18.
O: 16MAR2023 06:43:33 56.3N 114.1E mb=4.2 EMSC BURYATIYA, RUSSIA
P: 16MAR2023 151609 57.0N 121.0E 3.0-4.6 AACAA So. Siberia
P: 18MAR2023 151609 56.0N 110.0E 3.0-4.4 AACAA So. Siberia
In addition to seismic enhancement near the 103 degree distance from the Kermadec Islands, the 144 degree distance also showed seismic promotion today.
Earthquake of M 5.2 occurred at this distance from the Kermadec Islands in Iran and Iraq at 144-145 degrees from the Kermadec epicenter.
NEIC reported the event of M 5.1 in Iraq was felt with intensity II-III in the area(s) of Iraq in Sulaymaniyah (IV), Irbil and in Iran at Dezh Shahpur, Kordestan (IV), Pawa, Kerman, Javanrud, Aslamabad. Forecast 151505 had expected this event within about 100 km was likely
around March 12.
O: 16MAR2023 18:32:52 35.2N 46.2E mb=5.1 EMSC IRAN-IRAQ BORDER REGION
P: 12MAR2023 151505 36.0N 46.0E 3.8-5.2 BAAAA No. Iran
NEIC reported the earthquake of M 5.2 in Northwestern Iran/Azerbaijan was felt with intensity II-III in the area(s) of Northwestern Iran/Azerbaijan in Khoi (VI), Dilman (IV), Orumiyeh, Azar Shahr, Tebriz; in Van, Turkey; in Jrvesh, Armenia and Sulaymainyah, Iraq (V). Forecast 151538 had expected this event within about 100 km was likely around March 16.
O: 16MAR2023 11:47:20 38.5N 45.1E Mw=5.2 EMSC NORTHWESTERN IRAN
P: 16MAR2023 151538 38.0N 44.0E 3.5-5.4 AAAAA Turkey
An unusual earthquake of M 3.8 occurred in Portugal today. This area is near the antipode of the M 7.0 Kermadec Islands event earlier today but is closer to the antipode of North Island, New Zealand, where a series of moderate earthquakes is beginning. It may have been influenced by antipodal focusing of energy from these sources. The last earthquake in Portugal with M>=3.8 was an M 3.8 on March 26, 2011. Most earthquakes of this magnitude or above occur about 100 km south of this offshore or in Spain.
O: 17MAR2023 03:34:59 37.1N 8.2W ML=3.8 EMSC PORTUGAL
Regional seismicity enhancement in New Zealand also followed the M 7.0 in the Kermadec Islands today. This included felt earthquakes in the Milford Sound region of southern South Island; an M 4.6 near Christchurch, Canterbury and a series of moderate earthquakes up to M 5.3 in the Bay of Plenty region of North Island later in the day. These later two will be reported on in the next issue of this summary. The earthquake in Milford Sound had been expected within about 50 km of this epicenter to occur around March 18.
O: 17MAR2023 01:31:57 45.1S 167.6E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 17MAR2023 00:00:18 45.0S 167.5E ML=4.6 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 17MAR2023 00:00:18 45.0S 167.5E MS=4.6 GEONET South Island, New Zealand
P: 18MAR2023 151668 45.0S 168.0E 3.0-5.0 AAAAA So. Island, N.Z.
While seismicity in the region of Central California declined from that of the previous two days, there were two notable events in the area today. An M 2.5 in the Livermore area near San Francisco was reported by NEIC to have been felt with intensity II-III in California in Livermore, Pleasanton, Union City, San Ramon, Alameda, San Francisco, Turlock and Los Banos. This is the strongest earthquake within about 50 km of this epicenter since an M 3.6 on December 5, 2022. Forecasts 151485 and 151486 had expected today's activity in this area was likely around March 16-18.
O: 16MAR2023 12:35:12 37.5N 121.7W Md=2.9 EMSC NORTHERN CALIFORNIA
P: 16MAR2023 151485 37.1N 121.5W 2.5-4.7 AAAAA Central California
P: 18MAR2023 151486 37.9N 122.0W 2.5-4.6 AAAAA Central California
A second earthquake of M 2.5 also occurred off the coast of Central California west of Templeton. NEIC reported this earthquake of M 2.6 in off the coast of Central California was felt with intensity II-III in the area(s) of Los Osos and Ojai, California.
Antipodal seismicity has been occurring in three groups in the past several days. Moderate antipodal seismicity could be seen in the northern Kuril/Kamchatka area and the South Sandwich Islands; in Colombia/Panama and southern Sumatra and to a lesser extent may be expected in the Kermadec Islands and the area near the Strait of Gibraltar, Spain, Morocco and Portugal which is antipodal to the M 6.9 of March 4 and the M 7.0 of March 16, 2023. The last earthquake of M>=3 in the region antipodal to the Kermadec quakes was an M 4.9 on December 14, 2009; an M 4.0 on February 5, 2008 and an M 3.9 on March 24, 1992, the only such events in the area in the past 35 years. The most likely antipodal triggering from these Kermadec Islands earthquakes would be in the Strait of Gibraltar area which is moderately active at this time. Moderate seismic enhancement is possible in these regions in the next week.
Moderately large earthquakes have most recently occurred as a swarm in the Kamchatka and northern Kuril Islands beginning in late February, 2023. The largest in this swarm in the past two weeks was an M 5.2 on March 8 and an M 5.0 on March 14, 2023. Opposing earthquakes have occurred as an M 5.8 in the Kurils on March 8 and M 5.2 on March 12 and an M 5.6 on March 3, 2023.
Antipodal activity in Colombia and Indonesia has most recently included an M 5.4 in northern Colombia on March 10 and the eruption of Mt. Semeru in Indonesia of the same date and an M 5.3 in Sumatra of March 7, 2023. An M 5.5 event occurred in Java on February 7 following the M 7.8 in Turkey.
Enhanced seismicity also continued today in the region of Puerto Rico where another M 4.5 occurred north of the Ponce aftershock zone. This series of earthquakes in Puerto Rico and the Dominican Republic was most recently reported on in the previous issue of this summary as:
"A moderate earthquake of M 4.3 was felt in Puerto Rico today. NEIC reported maximum intensity IV in Ensenada, and Yauco, Puerto Rico with II-III shaking in Guanica, Lajas, Sabana Grande, Yauco, San German, Cabo Rojo, Penuelas, Ponce and Mayaguez among others. NEIC reported an aftershock of M 3.5 in Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico in Ensenada (V), Guanica, Lajas and Penuelas. This is the strongest earthquake in southern Puerto Rico since an M 4.5 on November 29, 2022. At the time this summary noted:
"A moderate earthquake of M 4.2-4.5 in southern Puerto Rico also shook that Island today. NEIC reported it was felt with maximum intensity V in Guayanilla and IV in Yauco, Penuelas, Ponce, and II-III in Adjuntas, Guanica, Lares, San German among others. This is an aftershock of the M 6.4 which hit the area with much damage in the Ponce region on January 7, 2020. The last earthquake in this area of Puerto Rico of equal or greater size was an M 4.5 more than a year ago on July 18, 2021." (November 29, 2022)
Forecast 151454 had expected today's event was likely within about 15 km of this epicenter around March 13, 2023. This activity is at the fourth node (90 degrees) from the recent major earthquakes in Turkey of February 6, 2023 and was probably promoted by energy from that source." (March 16, 2023)
NEIC reported today's earthquake of M 4.4 in the Mona Passage, Dominican Republic was felt with intensity II-III in the area(s) of Puerto Rico with IV in Moca and in Quebradillas, San Sebastian, Vega Alta.
O: 17MAR2023 03:26:21 19.1N 67.7W mb=4.5 EMSC PUERTO RICO REGION
P: 18MAR2023 151454 19.0N 68.0W 3.4-5.4 AAAAA Puerto Rico
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: 16MAR2023 18:32:52 35.2N 46.2E mb=5.1 EMSC IRAN-IRAQ BORDER REGION
P: 12MAR2023 151505 36.0N 46.0E 3.8-5.2 BAAAA No. Iran
NEIC reported this earthquake of M 5.1 in Iraq was felt with intensity II-III in the area(s) of Iraq in Sulaymaniyah (IV), Irbil and in Iran at Dezh Shahpur, Kordestan (IV), Pawa, Kerman, Javanrud, Aslamabad.
O: 16MAR2023 20:41:44 30.6N 50.2E mb=4.5 EMSC SOUTHERN IRAN
P: 17MAR2023 151530 31.0N 50.0E 3.8-5.3 AAAAA So. Iran
O: 16MAR2023 11:47:20 38.5N 45.1E Mw=5.2 EMSC NORTHWESTERN IRAN
P: 16MAR2023 151538 38.0N 44.0E 3.5-5.4 AAAAA Turkey
NEIC reported this earthquake of M 5.2 in Northwestern Iran/Azerbaijan was felt with intensity II-III in the area(s) of Northwestern Iran/Azerbaijan in Khoi (VI), Dilman (IV), Orumiyeh, Azar Shahr, Tebriz; in Van, Turkey; in Jrvesh, Armenia and Sulaymainyah, Iraq (V).
O: 17MAR2023 01:59:47 38.8N 73.0E mb=4.6 EMSC TAJIKISTAN
P: 16MAR2023 151496 38.0N 73.0E 3.8-5.5 AAAAA Hindu Kush/Pakistan
O: 16MAR2023 06:43:33 56.3N 114.1E mb=4.2 EMSC BURYATIYA, RUSSIA
P: 16MAR2023 151609 57.0N 121.0E 3.0-4.6 AACAA So. Siberia
P: 18MAR2023 151609 56.0N 110.0E 3.0-4.4 AACAA So. Siberia
INDONESIA AND PHILIPPINES
O: 16MAR2023 14:51:27 1.8N 127.4E mb=4.3 EMSC HALMAHERA, INDONESIA
O: 16MAR2023 17:54:56 1.9N 126.4E ML=4.3 EMSC MOLUCCA SEA
P: 16MAR2023 151407 2.0N 125.0E 4.0-5.4 AABAA Mindanao, Philippines
O: 16MAR2023 18:02:14 2.6N 96.0E ML=4.2 EMSC SIMEULUE, INDONESIA
P: 17MAR2023 151409 5.0N 97.0E 4.0-5.4 ACAAA Nicobar Islands
P: 17MAR2023 151410 3.0N 99.0E 4.0-5.4 AACAA So. Sumatera
O: 16MAR2023 10:30:12 3.6S 123.4E ML=4.1 EMSC SULAWESI, INDONESIA
P: 9MAR2023 151149 4.0S 123.0E 4.0-5.4 CAAAA Sulawesi area
O: 16MAR2023 12:52:53 4.2S 127.9E ML=4.2 EMSC BANDA SEA
P: 15MAR2023 151413 6.0S 128.0E 4.0-5.7 ABAAA Banda Sea
O: 17MAR2023 03:38:28 4.9N 125.5E mb=4.5 EMSC KEPULAUAN SANGIHE, INDONESIA
P: 13MAR2023 151408 5.0N 126.0E 4.0-5.8 BAAAA Mindanao, Philippines
O: 16MAR2023 14:03:56 5.5N 77.4W mb=4.5 EMSC NEAR WEST COAST OF COLOMBIA
P: 11MAR2023 151400 5.0N 78.0W 4.0-5.7 BAAAA Colombia
O: 16MAR2023 17:22:10 7.0N 126.3E ML=4.5 EMSC MINDANAO, PHILIPPINES
P: 15MAR2023 151406 7.0N 127.0E 4.0-5.4 AAAAA Halmahera
O: 16MAR2023 09:41:43 9.1S 126.7E ML=4.3 EMSC EAST TIMOR REGION
P: 15MAR2023 151413 7.0S 126.0E 4.0-5.7 ACAAA Banda Sea
O: 16MAR2023 17:03:07 11.5N 138.8E mb=5.0 EMSC STATE OF YAP, MICRONESIA
P: 12MAR2023 151457 12.0N 141.0E 4.0-5.4 BACAA So. Marianas/Guam
O: 16MAR2023 08:14:29 11.6S 117.4E mb=4.3 EMSC SOUTH OF SUMBAWA, INDONESIA
P: 12MAR2023 151635 11.0S 118.0E 4.0-5.5 BAAAA So. of Indonesia
CENTRAL AND SOUTH AMERICA
O: 17MAR2023 06:11:54 0.5S 78.6W ML=4.0 EMSC ECUADOR
P: 17MAR2023 151415 2.0S 78.0W 4.0-5.5 ABAAA Ecuador
O: 17MAR2023 03:04:21 9.3S 74.8W ML=4.3 EMSC CENTRAL PERU
P: 12MAR2023 151629 14.0S 73.0W 4.0-5.6 BCBAA Central Peru
O: 17MAR2023 01:35:13 13.0N 90.2W mb=4.2 EMSC OFFSHORE EL SALVADOR
P: 11MAR2023 151436 14.0N 89.0W 3.5-5.3 CAAAA Coast of Central America
O: 16MAR2023 19:09:03 14.9N 93.0W ML=4.2 EMSC OFFSHORE CHIAPAS, MEXICO
P: 16MAR2023 151434 14.0N 93.0W 3.5-5.1 AAAAA Chiapas, Mexico
O: 16MAR2023 09:16:37 16.2N 95.2W ML=4.0 EMSC OAXACA, MEXICO
P: 15MAR2023 151452 16.0N 96.0W 3.5-5.3 AAAAA Oaxaca, Mexico
O: 16MAR2023 13:40:02 16.8N 93.9W ML=4.1 EMSC CHIAPAS, MEXICO
P: 15MAR2023 151435 16.0N 94.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 16MAR2023 18:05:00 18.0N 73.0W ML=3.5 EMSC HAITI REGION
P: 17MAR2023 151456 20.0N 74.0W 3.4-5.3 ABAAA Puerto Rico
O: 16MAR2023 21:57:24 18.1N 67.1W Md=3.4 EMSC PUERTO RICO
P: 13MAR2023 151454 18.0N 67.0W 3.4-5.4 BAAAA Puerto Rico
O: 17MAR2023 07:22:32 18.9N 65.1W ML=3.3 EMSC VIRGIN ISLANDS REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 BAAAA Puerto Rico
P: 15MAR2023 151441 18.0N 64.0W 3.0-5.1 AAAAA Leeward Islands
O: 17MAR2023 03:26:21 19.1N 67.7W mb=4.5 EMSC PUERTO RICO REGION
P: 18MAR2023 151454 19.0N 68.0W 3.4-5.4 AAAAA Puerto Rico
O: 17MAR2023 01:36:43 19.5N 73.3W ML=3.7 EMSC HAITI REGION
P: 17MAR2023 151456 20.0N 74.0W 3.4-5.3 AAAAA Puerto Rico
O: 16MAR2023 21:30:48 19.6N 65.4W Md=3.6 EMSC PUERTO RICO REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 AAAAA Puerto Rico
O: 17MAR2023 06:40:38 19.6N 102.4W ML=4.1 EMSC MICHOACAN, MEXICO
O: 17MAR2023 07:25:44 19.6N 102.4W ML=4.0 EMSC MICHOACAN, MEXICO
P: 17MAR2023 151446 18.0N 101.0W 3.5-5.6 ABBAA Michoacan, Mexico
AFRICA AND EUROPE
O: 16MAR2023 15:50:50 35.1N 13.7E ML=3.6 EMSC CENTRAL MEDITERRANEAN SEA
O: 16MAR2023 10:00:10 34.5N 13.8E ML=4.1 EMSC CENTRAL MEDITERRANEAN SEA
P: 14MAR2023 151499 38.0N 15.0E 3.0-4.6 ACAAA Mediterranean/Sicily
O: 17MAR2023 06:44:01 35.4N 4.8W mb=2.8 EMSC STRAIT OF GIBRALTAR
P: 16MAR2023 151500 37.0N 3.0W 3.5-5.2 ABBAA Morocco/Spain
O: 16MAR2023 19:59:17 36.4N 34.4E ML=4.6 EMSC CENTRAL TURKEY
P: 13MAR2023 151537 36.0N 36.0E 3.5-5.2 BABAA Turkey
O: 17MAR2023 01:41:14 37.9N 36.6E mb=4.3 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 16MAR2023 10:55:08 40.8N 31.5E ML=4.7 EMSC WESTERN TURKEY
P: 16MAR2023 151567 41.0N 31.0E 3.5-5.2 AAAAA No. Turkey/Black Sea
NEIC reported this earthquake of M 4.8 in Western Turkey was felt with intensity II-III in the area(s) of Western Turkey with IV in Bolu and Hendek and II-III in Duzce, Sepanca, Ankara, Sile, Istanbul.
O: 17MAR2023 03:34:59 37.1N 8.2W ML=3.8 EMSC PORTUGAL
O: 16MAR2023 10:14:41 48.6N 24.4E ML=2.5 EMSC UKRAINE
P: 12MAR2023 151577 46.0N 26.0E 3.0-5.1 BCAAA Romania/NW Turkey
SOUTHWEST PACIFIC
O: 16MAR2023 07:06:22 15.8S 172.6W mb=4.8 EMSC SAMOA ISLANDS REGION
P: 16MAR2023 151631 15.0S 174.0W 4.0-5.4 AABAA Samoa Islands
O: 17MAR2023 05:08:01 17.5S 178.8W mb=4.4 EMSC FIJI REGION
P: 19MAR2023 151638 18.0S 180.0W 4.0-5.4 AABAA Tonga Islands
O: 16MAR2023 08:12:22 18.7S 168.3E mb=4.6 EMSC VANUATU
P: 17MAR2023 151641 18.0S 168.0E 4.0-5.4 AAAAA Vanuatu Islands
O: 16MAR2023 17:27:43 23.7S 179.5W mb=4.8 EMSC SOUTH OF FIJI ISLANDS
P: 16MAR2023 151653 25.0S 177.0W 4.0-5.5 ABCAA 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
O: 16MAR2023 12:53:07 30.6S 176.7W mb=4.7 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151659 30.0S 177.0W 4.0-5.4 AAAAA No. Kermadec Islands
O: 17MAR2023 01:31:57 45.1S 167.6E ML=3.0 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 17MAR2023 00:00:18 45.0S 167.5E ML=4.6 EMSC SOUTH ISLAND OF NEW ZEALAND
O: 17MAR2023 00:00:18 45.0S 167.5E MS=4.6 GEONET South Island, New Zealand
P: 18MAR2023 151668 45.0S 168.0E 3.0-5.0 AAAAA So. Island, N.Z.
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: 16MAR2023 09:48:56 31.0N 115.5W ML=3.2 EMSC BAJA CALIFORNIA, MEXICO
P: 17MAR2023 151515 30.7N 116.3W 2.5-4.8 AAAAA So. California
O: 17MAR2023 06:22:15 31.9N 116.2W ML=2.6 EMSC BAJA CALIFORNIA, MEXICO
P: 14MAR2023 151517 32.1N 116.4W 2.5-4.7 BAAAA So. California
O: 16MAR2023 11:53:13 33.7N 118.6W Ml=2.0 EMSC CHANNEL ISLANDS REG., CALIFORNIA
O: 16MAR2023 11:30:15 33.9N 118.6W Ml=2.1 EMSC CHANNEL ISLANDS REG., CALIFORN
P: 18MAR2023 151523 33.9N 118.3W 2.5-4.6 AAAAA So. California
NEIC reported these earthquakes of M 2.0 and 2.1 in Santa Monica Bay, California were felt with intensity II-III in the area(s) of Los Angeles, California.
O: 16MAR2023 14:31:08 34.0N 117.6W Ml=2.3 EMSC GREATER LOS ANGELES AREA, CALI
P: 16MAR2023 151522 33.7N 117.5W 2.5-4.8 AAAAA So. California
NEIC reported this earthquake of M 2.3 in greater Los Angeles, California was felt with intensity II-III in the area(s) of greater Los Angeles, California in Rancho Cucamonga and Norco.
O: 16MAR2023 20:58:43 36.5N 121.0W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 16MAR2023 07:20:59 36.8N 121.4W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 16MAR2023 151485 37.1N 121.5W 2.5-4.7 AAAAA Central California
O: 16MAR2023 12:35:12 37.5N 121.7W Md=2.9 EMSC NORTHERN CALIFORNIA
P: 16MAR2023 151485 37.1N 121.5W 2.5-4.7 AAAAA Central California
P: 18MAR2023 151486 37.9N 122.0W 2.5-4.6 AAAAA Central California
O: 17MAR2023 05:11:27 38.7N 122.9W Md=2.3 EMSC NORTHERN CALIFORNIA
P: 18MAR2023 151487 38.9N 122.8W 2.5-4.4 AAAAA Central California
ALASKA
O: 17MAR2023 03:33:15 52.6N 170.0W mb=4.2 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 18MAR2023 151599 52.4N 169.4W 3.5-5.0 AAAAA Fox Islands, Aleutians
O: 16MAR2023 14:00:28 53.0N 163.0W ML=3.5 EMSC UNIMAK ISLAND REGION, ALASKA
P: 16MAR2023 151611 54.2N 165.0W 3.5-4.9 ABBAA Unimak Islands, Aleutians
O: 16MAR2023 21:39:54 53.2N 166.7W ML=3.1 EMSC FOX ISLANDS, ALEUTIAN ISLANDS
P: 13MAR2023 151599 53.7N 167.0W 3.5-5.3 BAAAA Fox Islands, Aleutians
O: 16MAR2023 07:02:06 57.4N 154.8W ML=3.1 EMSC KODIAK ISLAND REGION, ALASKA
O: 16MAR2023 16:13:19 57.1N 156.4W ML=3.3 EMSC ALASKA PENINSULA
P: 16MAR2023 151588 54.7N 156.9W 3.5-5.5 ACAAA Alaska Peninsula
O: 16MAR2023 23:26:50 63.2N 150.4W ML=3.1 EMSC CENTRAL ALASKA
P: 15MAR2023 151618 62.8N 151.2W 3.2-5.3 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 16MAR2023 20:37:11 42.2N 119.4W ml=2.9 EMSC OREGON
O: 17MAR2023 01:25:39 42.2N 119.4W ML=2.5 EMSC OREGON
O: 16MAR2023 20:33:40 42.2N 119.4W ML=3.3 EMSC OREGON
P: 18MAR2023 151574 42.1N 120.3W 2.0-4.1 AAAAA Oregon state, U.S.
O: 17MAR2023 00:37:53 46.3N 118.1W ML=2.0 EMSC WASHINGTON
P: 17MAR2023 151562 47.7N 117.4W 2.0-4.1 ABAAA Montana/Idaho
O: 16MAR2023 14:59:09 56.1N 116.6W mb=5.0 EMSC ALBERTA, CANADA
O: 16MAR2023 15:07:46 56.1N 116.7W ML=3.8 EMSC ALBERTA, CANADA
O: 16MAR2023 14:46:17 56.1N 116.6W mb=4.8 EMSC ALBERTA, CANADA
P: 16MAR2023 151589 56.0N 120.0W 2.0-4.3 AABAA Alberta
ROCKY MOUNTAINS REGION
O: 16MAR2023 09:43:45 31.6N 104.3W ML=2.2 EMSC WESTERN TEXAS
O: 16MAR2023 17:29:46 31.6N 104.4W ML=2.6 EMSC WESTERN TEXAS
O: 17MAR2023 03:40:16 31.6N 104.5W ML=2.7 EMSC WESTERN TEXAS
O: 16MAR2023 23:44:39 31.5N 104.0W ML=2.2 EMSC WESTERN TEXAS
P: 18MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 16MAR2023 07:42:54 31.1N 101.2W ML=2.1 EMSC WESTERN TEXAS
P: 17MAR2023 151514 32.6N 101.6W 2.0-4.0 ABAAA SW U.S.A
EASTERN U.S./CANADA
O: 17MAR2023 07:13:24 35.3N 97.7W mb=2.4 EMSC OKLAHOMA
P: 16MAR2023 151533 35.0N 97.0W 2.0-3.9 AAAAA Southern Plains
O: 17MAR2023 04:56:54 40.2N 98.3W mb=2.9 EMSC NEBRASKA
P: 12MAR2023 151534 39.0N 99.0W 2.0-4.0 BBAAA Southern Plains
HAWAII
No earthquakes of M>=3 were located in Hawaii.
MAJOR EARTHQUAKE IN KERMADEC ISLANDS, NEW ZEALAND
EARTHQUAKE SUMMARY FOR MARCH 15, 2023
The strongest earthquake in the world today was an M 7.0 in the Kermadec Islands. NEIC reported it was lightly felt as far as Whakatane Bay of Plenty and Wellington, North Island, New Zealand. This earthquake occurred within minutes of local solar noon and was likely promoted by high tidal stresses at this hour. It is located near the longitude of strongest tidal stresses with the previous full moon as noted in previous issues of this summary:
"The full moon will arrive on March 7, 2023 at 12:40 UT. Longitudes which are near local solar noon at this time are located near 10 West longitude and those at local solar midnight at 170 East longitude. In the west these include areas of western Europe and the mid-Atlantic Rift as far as Iceland to the South Sandwich Islands and the southern Mid-Atlantic and in the east areas near local solar midnight at the time of this full moon include the Vanuatu-Tonga-Fiji-Kermadec Islands and New Zealand and in the north the western Aleutians. These are the most like regions to experience strong tidal triggering within about a week of this full moon. They include a number of areas near the IDL which could see a strong to major earthquake at this time." (March 4-6, 2023)
The last earthquakes in the Kermadec Islands with equal or greater magnitude than M 7.0 occurred on March 4, 2021 with M 8.1 and M 7.4. When the M 6.9 hit near this in the Kermadec Islands on March 4, 2023, this summary noted:
"NEIC reported this earthquake in the Kermadec Islands may have been felt in Auckland, the Bay of Plenty, Hawke's Bay and as far to the south as Wellington, New Zealand. At M 6.9 this is the strongest earthquake within about 200 km of this epicenter in the Kermadec Islands since an M 8.1 and M 7.4 exactly two years ago on March 4, 2021 and an M 7.6 on July 6, 2011. Both those events occurred about 150-200 km east of today's epicenter." (March 4, 2023)
Forecast 151659 had expected today's earthquake was likely within about 50 km of this epicenter around March 16, 2023.
O: 16MAR2023 01:46:11 30.2S 176.4W mb=5.0 EMSC KERMADEC ISLANDS REGION
O: 16MAR2023 00:56:02 30.1S 176.2W Mw=7.0 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151659 30.0S 177.0W 4.0-5.4 AAAAA No. Kermadec Islands
The strong swarm near Mammoth Lakes, California continued today with an M 3.8. This event was reported felt with intensity III in Silverpeak, Nevada. This continues a swarm in the region which included events of M 3.8 and 3.8 yesterday and was reported in the previous issues of this summary as:
"A strong swarm of earthquakes also occurred in the region of California east of
Mammoth Lakes on the Nevada border today and is continuing at this writing.
This was particularly prominent near local solar midnight. It included an
M 3.8, the second such of the day - after a similar M 3.8 at 05:00 UT - shock which was widely felt in the area. This swarm began several hours earlier and was described in the previous issue of this summary as:
"A series of light earthquakes, including an M 3.8 also occurred in Central California east of Mammoth Lakes on the Nevada border today. This may mark the beginning of a period of enhanced seismicity in the region of California which has been relatively quiet in recent weeks. This often occurs as a regional acceleration of seismicity associated with strong nor'easters as noted in regard to the activity in Queen Charlotte Islands of the past several days. This area in Central California is at 103 degrees from the recent major earthquakes in Turkey and could see a moderate event in the next several weeks. The last earthquake in this region of stronger magnitude was an M 4.8 on January 6, 2022." (March 15, 2023)
Forecast 151479 had expected today's activity within about 50 km was likely around March 16. This epicenter is located at 103 degrees from the major activity in Turkey of February 6, 2023 and at the same distance from the M 7.2 in Tajikistan of February 23 and at the fourth node (90 degrees) from the earthquakes of M 6.9 and 7.0 in the Kermadec Islands and may have been promoted by energy from those sources.
O: 15MAR2023 12:54:07 37.5N 118.0W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 16:43:51 37.5N 118.0W ML=2.5 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 19:43:40 37.5N 118.0W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 20:45:25 37.5N 118.0W ML=2.2 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:09:09 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:28:40 37.5N 118.0W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:44:05 37.5N 118.0W ML=3.5 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:44:05 37.5N 118.0W ML=3.8 ANSS CENTRAL CALIFORNIA
O: 15MAR2023 22:12:34 37.5N 118.0W ml=2.5 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 22:34:40 37.5N 118.0W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 12:30:09 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151480 37.3N 118.3W 2.5-4.4 AAAAA California/Nevada area
A new series of light earthquakes also began today in Central California about
100 km south of the events near San Jose reported in the previous issue of this summary. The largest event in this new series was an M 3.5. It was reported by NEIC to have been felt with intensity II-III in California at Lockwood, Bradley, Cambria, Big Sur, Templeton, Morro Bay, Los Osos, Salinas and Lompoc among others. The last earthquake within about 50 km of these events with M>=3.5 occurred on October 25, 2021 with M 4.7 and 3.5. At the time this summary noted in this regard:
“The strongest earthquake in the U.S. or Canada today was an M 4.7 in Central California. NEIC reported this event was felt with intensity II-III in San Simeon, Lockwood, Bradley, Cambria, Big Sur, Cayucos, Paso Robles, King City, San Arlo and Templeton among others in California. An M 3.5 aftershock was felt in the same area. This moderate activity may be related to a strong storm which hit California about the same time. This storm is considered by some to be the strongest to hit California in recent years. This storm hit northern California causing mudslides and torrential rains blocking roads, overturning trucks and flooding streets. This cyclone included a sudden drop in atmospheric pressure leading to unloading on the earth's surface which may have triggered the event in Central California. A nor'easter also appears to be forming off the east coast of the U.S. States of emergency with this storm have been called in New York and the northeastern U.S. This storm could also enhance regional seismicity along the western edge of the North American tectonic plate. The last earthquake within about 100 km of this epicenter was an M 5.4 on October 21, 2012 about 100 km to the northeast of this epicenter. A strong M 6.6 hit near this epicenter on December 22, 2003 causing deaths and considerable damage in the Templeton, California area." (October 26, 2021)
Readers may recall that a strong nor'easter hit the region of New England over the past two days as noted with earlier events in this region. Forecast 151511 had expected today's event within about 10 km of this epicenter was likely around March 14, 2023. Like other activated regions at this time in California, this epicenter is at 103 degrees from recent major earthquakes in Turkey and Tajikistan and may have been promoted by energy from those sources.
O: 15MAR2023 18:29:41 35.7N 121.3W ML=3.3 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 18:29:41 35.7N 121.2W ML=3.5 ANSS CENTRAL CALIFORNIA
O: 15MAR2023 19:41:13 35.8N 121.2W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151511 35.7N 121.2W 2.5-4.7 AAAAA Off So. California
A moderate earthquake of M 4.3 was felt in Puerto Rico today. NEIC reported maximum intensity IV in Ensenada, and Yauco, Puerto Rico with II-III shaking in Guanica, Lajas, Sabana Grande, Yauco, San German, Cabo Rojo, Penuelas, Ponce and Mayaguez among others. NEIC reported an aftershock of M 3.5 in Puerto Rico was felt with intensity II-III in the area(s) of Puerto Rico in Ensenada (V), Guanica, Lajas and Penuelas. This is the strongest earthquake in southern Puerto Rico since an M 4.5 on November 29, 2022. At the time this summary noted:
"A moderate earthquake of M 4.2-4.5 in southern Puerto Rico also shook that Island today. NEIC reported it was felt with maximum intensity V in Guayanilla and IV in Yauco, Penuelas, Ponce, and II-III in Adjuntas, Guanica, Lares, San German among others. This is an aftershock of the M 6.4 which hit the area with much damage in the Ponce region on January 7, 2020. The last earthquake in this area of Puerto Rico of equal or greater size was an M 4.5 more than a year ago on July 18, 2021." (November 29, 2022)
Forecast 151454 had expected today's event was likely within about 15 km of this epicenter around March 13, 2023. This activity is at the fourth node (90 degrees) from the recent major earthquakes in Turkey of February 6, 2023 and was probably promoted by energy from that source.
O: 15MAR2023 08:10:36 17.9N 66.9W ML=3.2 EMSC PUERTO RICO REGION
O: 15MAR2023 08:30:00 17.9N 66.9W ML=3.2 EMSC PUERTO RICO REGION
O: 15MAR2023 11:23:01 17.9N 67.0W Md=3.5 EMSC PUERTO RICO
O: 16MAR2023 01:19:08 18.0N 67.0W Md=3.0 EMSC PUERTO RICO
O: 16MAR2023 04:25:20 18.0N 67.0W Md=3.1 EMSC PUERTO RICO
O: 15MAR2023 07:51:46 17.9N 66.9W ML=4.3 EMSC PUERTO RICO REGION
P: 13MAR2023 151454 18.0N 67.0W 3.4-5.4 AAAAA Puerto Rico
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: 16MAR2023 04:28:43 23.3N 121.2E ML=4.1 EMSC TAIWAN
O: 16MAR2023 04:28:43 23.3N 121.2E ML=4.1 TAI Hualien, Taiwan
P: 7MAR2023 151201 23.0N 122.0E 4.0-5.4 CAAAA Taiwan
P: 20MAR2023 151474 21.0N 120.0E 4.0-5.4 BCAAA Taiwan
CWB reported this earthquake was felt with intensity IV in Taitung, III in Hualien, II in Nantou and I in Kaohsiung, Chiayi and Yunlin Counties, Taiwan.
O: 15MAR2023 09:40:43 33.9N 82.0E mb=4.4 EMSC WESTERN XIZANG
P: 18MAR2023 151507 35.0N 78.0E 3.8-5.2 BBCAA Northern India
O: 16MAR2023 06:43:33 56.3N 114.1E mb=4.2 EMSC BURYATIYA, RUSSIA
P: 18MAR2023 151609 56.0N 110.0E 3.0-4.4 AACAA So. Siberia
INDONESIA AND PHILIPPINES
O: 15MAR2023 19:49:39 2.4S 139.6E mb=4.5 EMSC NEAR N COAST OF PAPUA, INDONES
P: 12MAR2023 151430 2.0S 138.0E 4.0-5.4 BABAA West Irian, PNG
O: 15MAR2023 21:49:17 2.9N 127.2E ML=4.1 EMSC MOLUCCA SEA
P: 13MAR2023 151404 3.0N 127.0E 4.0-5.5 AAAAA Halmahera
O: 15MAR2023 15:32:26 3.2N 123.3E mb=4.0 EMSC CELEBES SEA
P: 19MAR2023 151408 4.0N 123.0E 4.0-5.4 BAAAA Mindanao, Philippines
O: 15MAR2023 21:25:40 4.8N 127.0E Mw=5.4 EMSC KEPULAUAN TALAUD, INDONESIA
P: 13MAR2023 151405 5.0N 127.0E 4.0-5.5 AAAAA Halmahera
O: 16MAR2023 02:06:26 9.6S 117.4E ML=4.1 EMSC SUMBAWA REGION, INDONESIA
P: 18MAR2023 151635 10.0S 116.0E 4.0-5.4 AABAA Sumbawa Island area
O: 16MAR2023 05:22:42 10.6S 113.4E Mw=5.2 EMSC SOUTH OF JAVA, INDONESIA
P: 18MAR2023 151635 10.0S 116.0E 4.0-5.4 AACAA Sumbawa Island area
O: 16MAR2023 04:21:26 15.5N 120.2E mb=4.7 EMSC LUZON, PHILIPPINES
P: 15MAR2023 151444 16.0N 120.0E 3.5-5.1 AAAAA Luzon, Philippines
NEIC reported this earthquake of M 4.7 in the Central Philippines was felt with intensity II-III in the area(s) of the Central Philippines with V in Ilocos at Bugallon and Mangatarem and IV in Luzon at Sinilian. Intensity II-III was reported from Central Luzon at Bani, San Juan, Camiling, Tarlac, Calingcuan and Banaoang and in Ilocos at Umanday.
CENTRAL AND SOUTH AMERICA
O: 15MAR2023 08:49:07 7.9N 83.1W ML=4.0 EMSC OFF COAST OF COSTA RICA
P: 17MAR2023 151402 8.0N 83.0W 3.5-5.4 AAAAA Costa Rica
O: 15MAR2023 21:50:42 3.9N 76.1W mb=4.6 EMSC COLOMBIA
P: 6MAR2023 151126 5.0N 76.0W 4.0-5.5 CBAAA Colombia
P: 11MAR2023 151400 5.0N 78.0W 4.0-5.7 BBBAA Colombia
O: 15MAR2023 20:32:21 17.9N 101.1W ML=4.0 EMSC GUERRERO, MEXICO
O: 15MAR2023 10:42:16 18.1N 103.3W ML=4.1 EMSC OFFSHORE MICHOACAN, MEXICO
O: 15MAR2023 20:23:32 18.2N 103.2W ML=3.9 EMSC OFFSHORE MICHOACAN, MEXICO
P: 13MAR2023 151446 18.0N 102.0W 3.5-5.7 AAAAA Michoacan, Mexico
O: 15MAR2023 22:19:15 18.5N 73.5W ML=3.4 EMSC HAITI REGION
P: 17MAR2023 151456 20.0N 74.0W 3.4-5.3 ABAAA Puerto Rico
O: 15MAR2023 15:31:19 18.7N 70.3W ML=3.0 EMSC DOMINICAN REPUBLIC
P: 13MAR2023 151456 19.0N 71.0W 3.4-5.3 AAAAA Puerto Rico
O: 15MAR2023 16:14:41 18.6N 65.0W Md=3.5 EMSC VIRGIN ISLANDS REGION
O: 16MAR2023 00:56:16 18.6N 65.1W Md=3.2 EMSC VIRGIN ISLANDS REGION
O: 16MAR2023 06:00:50 18.8N 64.6W ML=3.6 EMSC VIRGIN ISLANDS REGION
O: 16MAR2023 00:41:06 18.9N 65.0W Md=3.7 EMSC VIRGIN ISLANDS REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 AAAAA Puerto Rico
O: 15MAR2023 10:01:39 19.2N 66.6W Md=3.4 EMSC PUERTO RICO REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 AAAAA Puerto Rico
P: 14MAR2023 151461 20.0N 66.0W 3.0-5.1 AAAAA Bahamas/No. Caribbean
O: 15MAR2023 16:09:31 19.5N 102.4W ML=4.1 EMSC MICHOACAN, MEXICO
O: 15MAR2023 17:58:49 19.5N 102.4W ML=4.1 EMSC MICHOACAN, MEXICO
O: 15MAR2023 18:47:22 19.5N 102.4W ML=4.0 EMSC MICHOACAN, MEXICO
O: 15MAR2023 14:44:32 19.6N 102.4W ML=4.6 EMSC MICHOACAN, MEXICO
O: 15MAR2023 14:54:04 19.6N 102.4W ML=4.5 EMSC MICHOACAN, MEXICO
O: 15MAR2023 14:58:17 19.6N 102.4W ML=4.4 EMSC MICHOACAN, MEXICO
O: 15MAR2023 18:13:58 19.6N 102.4W ML=4.0 EMSC MICHOACAN, MEXICO
P: 13MAR2023 151446 18.0N 102.0W 3.5-5.7 ABAAA Michoacan, Mexico
O: 15MAR2023 21:35:21 24.4S 70.9W mb=4.4 EMSC OFFSHORE ANTOFAGASTA, CHILE
P: 14MAR2023 151646 24.0S 69.0W 4.0-5.8 AABAA Coast No. Chile
O: 15MAR2023 09:35:41 28.3S 70.6W mb=4.2 EMSC ATACAMA, CHILE
P: 16MAR2023 151645 28.0S 71.0W 4.0-5.8 AAAAA Coast Central Chile
O: 15MAR2023 12:34:07 38.3S 75.2W ML=3.7 EMSC OFF COAST OF ARAUCANIA, CHILE
O: 15MAR2023 16:24:12 38.4S 75.9W ML=4.1 EMSC OFF COAST OF ARAUCANIA, CHILE
P: 14MAR2023 151658 38.0S 74.0W 4.0-5.4 AABAA Central Chile
O: 15MAR2023 16:59:12 44.1S 78.8W mb=4.6 EMSC OFF COAST OF AISEN, CHILE
P: 12MAR2023 151663 43.0S 83.0W 4.0-5.4 BBCAA Chile Rise
O: 15MAR2023 08:10:36 17.9N 66.9W ML=3.2 EMSC PUERTO RICO REGION
O: 15MAR2023 08:30:00 17.9N 66.9W ML=3.2 EMSC PUERTO RICO REGION
O: 15MAR2023 11:23:01 17.9N 67.0W Md=3.5 EMSC PUERTO RICO
O: 16MAR2023 01:19:08 18.0N 67.0W Md=3.0 EMSC PUERTO RICO
O: 16MAR2023 04:25:20 18.0N 67.0W Md=3.1 EMSC PUERTO RICO
O: 15MAR2023 07:51:46 17.9N 66.9W ML=4.3 EMSC PUERTO RICO REGION
P: 13MAR2023 151454 18.0N 67.0W 3.4-5.4 AAAAA Puerto Rico
AFRICA AND EUROPE
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 15MAR2023 19:20:10 9.8S 161.5E mb=4.8 EMSC SOLOMON ISLANDS
P: 14MAR2023 151428 9.0S 157.0E 4.0-5.6 AACAA Solomon Islands
O: 15MAR2023 07:39:14 15.1S 173.4W mb=4.7 EMSC TONGA
P: 16MAR2023 151631 15.0S 174.0W 4.0-5.4 AAAAA Samoa Islands
O: 15MAR2023 09:28:20 18.0S 174.3W mb=4.5 EMSC TONGA
P: 16MAR2023 151639 19.0S 175.0W 4.0-5.7 AAAAA Tonga Islands
O: 16MAR2023 07:06:22 15.8S 172.6W mb=4.8 EMSC SAMOA ISLANDS REGION
P: 16MAR2023 151631 15.0S 174.0W 4.0-5.4 AABAA Samoa Islands
O: 15MAR2023 18:39:19 17.9S 178.6W mb=4.5 EMSC FIJI REGION
O: 15MAR2023 12:26:15 17.6S 178.5W mb=4.6 EMSC FIJI REGION
P: 17MAR2023 151638 18.0S 177.0W 4.0-5.6 AABAA 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
O: 16MAR2023 01:46:11 30.2S 176.4W mb=5.0 EMSC KERMADEC ISLANDS REGION
O: 16MAR2023 00:56:02 30.1S 176.2W Mw=7.0 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151659 30.0S 177.0W 4.0-5.4 AAAAA No. Kermadec Islands
O: 16MAR2023 01:01:13 41.0S 175.6E ML=4.2 EMSC NORTH ISLAND OF NEW ZEALAND
P: 13MAR2023 151664 40.0S 175.0E 3.0-4.4 BAAAA North Island, N.Z.
P: 20MAR2023 151667 41.0S 174.0E 3.0-5.1 BABAA So. Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 16MAR2023 04:24:14 50.4N 156.9E mb=4.1 EMSC KURIL ISLANDS
P: 14MAR2023 151600 52.0N 158.0E 4.0-5.9 ABAAA Kamchatka
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 15MAR2023 12:54:07 37.5N 118.0W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 16:43:51 37.5N 118.0W ML=2.5 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 19:43:40 37.5N 118.0W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 20:45:25 37.5N 118.0W ML=2.2 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:09:09 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:28:40 37.5N 118.0W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 21:44:05 37.5N 118.0W ML=3.5 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 22:12:34 37.5N 118.0W ml=2.5 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 22:34:40 37.5N 118.0W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 12:30:09 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151480 37.3N 118.3W 2.5-4.4 AAAAA California/Nevada area
O: 15MAR2023 18:29:41 35.7N 121.3W ML=3.3 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 19:41:13 35.8N 121.2W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151511 35.7N 121.2W 2.5-4.7 AAAAA Off So. California
O: 15MAR2023 17:04:53 36.7N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 18MAR2023 151484 36.7N 121.4W 2.5-4.7 BAAAA Central California
O: 16MAR2023 01:15:37 39.3N 123.3W Md=2.1 EMSC NORTHERN CALIFORNIA
P: 15MAR2023 151488 39.6N 123.4W 2.5-4.5 AAAAA Central California
O: 15MAR2023 18:46:31 40.5N 126.1W ML=2.7 EMSC OFF COAST OF NORTHERN CALIFORN
P: 12MAR2023 151570 42.1N 126.9W 3.0-4.5 BBAAA Off Coast of Oregon
P: 13MAR2023 151569 40.6N 124.9W 2.5-4.7 AAAAA Off Coast of No. Calif
ALASKA
O: 16MAR2023 02:58:28 51.8N 178.1W ML=3.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.
O: 15MAR2023 07:23:25 51.9N 178.1W ML=3.2 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
P: 14MAR2023 151593 51.0N 179.9W 3.5-4.9 AAAAA Andreanoff Isls, Aleutians
O: 16MAR2023 07:02:06 57.4N 154.8W ML=3.1 EMSC KODIAK ISLAND REGION, ALASKA
P: 5MAR2023 151338 58.0N 154.5W 3.2-5.0 CAAAA Central Alaska
NEIC reported this earthquake of M 3.2 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska in Bethel.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 15MAR2023 21:33:11 46.6N 122.5W Ml=2.2 EMSC WASHINGTON
P: 13MAR2023 151584 47.5N 121.8W 2.0-3.9 AAAAA Washington state, U.S.
ROCKY MOUNTAINS REGION
O: 16MAR2023 05:34:32 31.7N 104.4W ML=2.2 EMSC WESTERN TEXAS
O: 15MAR2023 12:53:06 32.0N 103.8W ML=2.0 EMSC NEW MEXICO
O: 16MAR2023 01:51:31 31.6N 104.3W ML=2.0 EMSC WESTERN TEXAS
P: 18MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 16MAR2023 01:59:45 32.0N 103.8W ML=2.8 EMSC NEW MEXICO
P: 15MAR2023 151513 32.6N 103.6W 2.0-4.0 AAAAA SW U.S.A
EASTERN U.S./CANADA
O: 16MAR2023 01:50:59 35.1N 95.5W ML=2.6 EMSC OKLAHOMA
P: 16MAR2023 151533 35.0N 97.0W 2.0-3.9 AABAA Southern Plains
O: 15MAR2023 20:43:22 36.4N 96.9W ML=2.8 EMSC OKLAHOMA
P: 14MAR2023 151534 36.0N 97.0W 2.0-4.2 AAAAA Southern Plains
NEIC reported this earthquake of M 2.8 in Oklahoma was felt with intensity II-III in the area(s) of Oklahoma in Pawnee.
O: 15MAR2023 22:46:04 35.7N 84.1W Md=2.5 EMSC EASTERN TENNESSEE
P: 16MAR2023 151497 35.0N 82.0W 2.0-3.9 AABAA Kentucky/Tennessee/NC
NEIC reported this earthquake of M 2.5 in Eastern Tennessee was felt with intensity II-III in the area(s) of Eastern Tennessee in Jefferson City (IV), Friendsville, Garlinburg and in Hudson, North Carolina.
O: 16MAR2023 05:07:53 46.6N 76.4W MB=2.2 ECAN of Maniwaki, QC
O: 16MAR2023 05:11:12 46.6N 76.4W MB=2.0 ECAN of Grand-Remous, QC
P: 15MAR2023 151565 45.0N 75.0W 2.0-4.4 ABAAA New York State
O: 16MAR2023 02:28:09 47.5N 70.4W MB=1.4 ECAN of Saint-Joseph-de-la-Rive, QC
O: 15MAR2023 05:53:51 47.7N 70.0W MB=0.8 ECAN of Saint-Siméon, QC
P: 16MAR2023 151558 47.0N 69.0W 2.0-4.2 AAAAA Maine
O: 14MAR2023 22:49:57 51.9N 92.0W MB=2.2 ECAN of Cat Lake, ON
O: 14MAR2023 21:58:38 50.1N 94.1W MB=2.4 ECAN of English River, ON
HAWAII
No earthquakes of M>=3 were located in Hawaii.
MODERATE QUAKES IN CENTRAL MEDITERRANEAN AND CENTRAL CHILE
EARTHQUAKE SUMMARY FOR MARCH 14, 2023
The strongest earthquake in the world today was an M 5.5 in the area of Araucania, Chile. This is the strongest earthquake in the region of Araucania, Chile within about 200 km of this epicenter since an M 6.7 on December 27, 2020. A major earthquake of M 7.5-8.0 hit this area on February 27, 2010 causing major damage throughout the area. At the time of the December, 2020 event this summary noted in this regard:
"An earthquake of M 6.7-6.8 shook south-Central Chile in the region of Los Lagos today. This is the strongest earthquake in the world in nearly two months - since an M 7.0 in the Dodecanese Islands, Greece on October 30, 2020. It occurred at an epicenter where the total eclipse of the sun was maximized on December 14 and is a prime example of high tidal stresses associated with eclipses affecting subsequent seismicity. A series of strong quakes has occurred in Chile since December 14, including one within minutes of the eclipse in northern Chile, but the location of today's event at precisely the point of maximum eclipse in Chile is strong evidence for tidal triggering ...
Today's M 6.7 in Chile was preceded by several precursory events as outlined in this summary in the previous issue:
"An unusual earthquake occurred northwest of New Zealand today with M 4.8. This is the strongest earthquake within about 300 km of this epicenter in at least 30 years. Previous earthquakes in this region have often occurred within hours or days of strong earthquakes in southern Chile as discussed in this summary on February 24-25, 2010, ten years ago, several days before an M 8.8 in Central Chile" (December 26-27, 2020)
It is of some interest that unusual activity was noted in New Zealand yesterday and reported in this summary as:
"An unusual earthquake of M 4.7 occurred today off the east coast of South Island, New Zealand. It was followed by an aftershock of M 3.7. These events were not reported felt in this remote area. This is in an area where the last earthquake of M>=4.7 occurred more than 35 years ago and is the only such event in the area since modern seismology reported epicenters accurately. It occurred near local solar noon and may have been promoted by high tidal stresses with the full moon as it occurred near the longitude of maximum tidal stress with that alignment" (March 13, 2023)
Forecast 151658 had expected today's event within about 100 km was likely around March 14, 2023.
O: 14MAR2023 19:56:39 38.4S 75.1W Mw=5.5 EMSC OFF COAST OF ARAUCANIA, CHILE
P: 14MAR2023 151658 38.0S 74.0W 4.0-5.4 AAAAA Central Chile
A moderate earthquake of M 5.4 occurred today in the Central Mediterranean Sea south of Greece today. The last earthquake of equal or larger magnitude within about 150 km of this epicenter was an M 6.0 on November 27, 2019 and an M 6.4 on October 12, 2013. At the time of the event in November, 2019 this summary noted in this regard:
"The strongest earthquake of the day was an M 6.0 in Crete, Greece. NEIC reported it was felt with minor damage in Crete, Greece at Kolimvari; V in Platanos, Kissamos, Ayia Marina, Daratsos; IV in Galatas, Khania and Nerelouros anbd III in Penvolia and Vamvakopoulon. Earthquakes of M>=6 within about 200 km of this event in Crete last occurred as an M 6.4 on October 12, 2013 and prior to that as an M 6.7 on January 8, 2006. A major event occurred about 250 km northwest of this on February 14, 2008." (November 27, 2019)
Forecast 141402 had expected today's event within about 50 km was likely around March 14, 2023.
O: 14MAR2023 16:36:03 35.6N 22.1E Mw=5.4 EMSC CENTRAL MEDITERRANEAN SEA
P: 14MAR2023 151502 36.0N 22.0E 3.0-4.7 AAAAA No. Greece
A pair of moderate earthquakes occurred in the Kermadec Islands today with M 4.6 and 4.2. These occurred within minutes of local solar noon and local solar midnight and were probably promoted by high tidal stresses which maximize near this hour. This suggests that high stresses still exist in this region following the M 6.9 in the Kermadec Islands of March 4, 2023 and that a strong aftershock in this region is still possible and perhaps likely. Today's earthquakes were not reported felt in this remote area. Forecasts 151659 and 151662 had expected this activity was likely around March 16.
O: 14MAR2023 23:45:26 29.7S 179.1W mb=4.6 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151659 30.0S 177.0W 4.0-5.4 AABAA No. Kermadec Islands
O: 14MAR2023 12:34:28 32.6S 179.6E ML=4.2 EMSC SOUTH OF KERMADEC ISLANDS
P: 16MAR2023 151662 32.0S 180.0E 4.0-5.4 AAAAA So. Kermadec Islands
A strong swarm of minor earthquakes hit the region of Central California south of San Francisco today. The major activity began with three earthquakes of M 3.4 each and included at least 10 aftershocks of M>=2 in the next half day. Most of this occurred near local solar noon and may have been promoted by high tidal stresses which maximize near this hour. The last swarm in this region with two or more events of M>=3.4 occurred on October 29, 2019 and included M 3.4, 3.1 and 3.8 events and on January 2-3, 2021 with events of M 4.3, 3.4, 3.2 and 3.2. Forecast 151484 had expected today's activity within about 10 km of these epicenters was likely around March 12, 2023.
NEIC reported these earthquakes of M 3.4, 3.4, 3.4, 2.9, 2.2, 3.0 in Central California were felt with intensity II-III in the area(s) of Central California in San Jose, Hollister, Salinas, Marina, Los Banos. This activity is at 103 degrees from the major quakes in Tajikistan and Turkey of February, 2023 and may have been promoted by energy from those sources.
O: 14MAR2023 17:47:48 36.7N 121.3W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 18:57:20 36.7N 121.3W Md=2.4 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 18:58:35 36.7N 121.4W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 19:15:55 36.7N 121.3W ML=2.8 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 05:42:15 36.7N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 05:42:15 36.7N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 17:41:44 36.7N 121.4W ML=3.1 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 17:41:44 36.7N 121.4W ML=3.4 ANSS CENTRAL CALIFORNIA
O: 14MAR2023 17:41:24 36.7N 121.4W ML=3.4 ANSS CENTRAL CALIFORNIA
O: 14MAR2023 17:46:51 36.7N 121.4W ML=3.4 ANSS CENTRAL CALIFORNIA
P: 12MAR2023 151484 36.8N 121.3W 2.5-4.7 AAAAA Central California
A strong swarm of earthquakes also occurred in the region of California east of
Mammoth Lakes on the Nevada border today and is continuing at this writing. This was particularly prominent near local solar midnight. It included an M 3.8, the second such of the day - after a similar M 3.8 at 05:00 UT - shock which was widely felt in the area. This swarm began several hours earlier and was described in the previous issue of this summary as:
"A series of light earthquakes, including an M 3.8 also occurred in Central California east of Mammoth Lakes on the Nevada border today. This may mark the beginning of a period of enhanced seismicity in the region of California which has been relatively quiet in recent weeks. This often occurs as a regional acceleration of seismicity associated with strong nor'easters as noted in regard to the activity in Queen Charlotte Islands of the past several days. This area in Central California is at 103 degrees from the recent major earthquakes in Turkey and could see a moderate event in the next several weeks. The last earthquake in this region of stronger magnitude was an M 4.8 on January 6, 2022. At the time this summary noted in this regard:
"A pair of earthquakes of M 4.8 preceded the aftershock off northern California today. The first event of M 4.8 near Mina, Nevada was reported by NEIC to have been felt with intensity II-III in Nevada at Luning, Silverpeak, Gabbs, Goldfield, Hawthorne, Round Mountain (IV), Tonopah (IV) and Glenbrook and in California at Bishop and Yosemite National Park. The second about 100 km to the south of the first, occurred about an hour before and may have helped trigger the aftershock off the coast of California. These earthquakes on the border between Central California and Nevada were reported felt with maximum intensity VI in California at Big Pine and III in Independence, Bishop, Benton, Kings Canyon National Park and in Nevada at Silverpeak, Goldfield and II in Mammoth Lakes, Shaver Lake and Dunlap, California. An M 2.2 foreshock occurred near local solar noon within about 25 km of this epicenter. The last earthquake of M>=4.8 within about 50 km of this epicenter occurred on February 14, 2015 about 30 km to the south of today's epicenter on February 14, 2015, the only such earthquake in the area in the past 30 years. An M 5.7 about 100 km northeast of today's M 4.8 occurred on August 1, 1999. Forecast 140084 had expected today's activity was likely around January 6. Like a light earthquake in the Lake Erie, Ohio area yesterday this, and other events in Nevada and California today may have been prompted by the strong meteorological storm of the past two days along the East Coast of the U.S. If this is true, a strong to major event in the western zone of the North and Central American tectonic plate is still a distinct possibility in the next several days." (January 6, 2022)
The nor'easter storm in the area of New England today (as occurred with the event of January 6 in California) may have helped promote today's swarm in Central California.
NEIC reported this earthquake of M 3.8 in Nevada was felt with intensity II-III in the area(s) of Nevada in Silverpeak. Forecast 151479 had expected today's activity within about 50 km was likely around March 16. This epicenter is located at 103 degrees from the major activity in Turkey of February and at the same distance from the M 7.2 in Tajikistan of February 23 and may have been promoted by energy from those sources." (March 14, 2023)
NEIC reported these earthquakes of M 3.9, 3.8, 3.3, 3.2 ... in the California-Nevada border were felt with intensity II-III in the area(s) of Nevada at Silverpeak, Glenbrook and in California at Lone Pine. This activity is at 103 degrees from the major quakes in Tajikistan and Turkey of February, 2023 and may have been promoted by energy from those sources.
O: 14MAR2023 09:25:08 37.5N 118.0W ML=3.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:32:51 37.5N 118.0W ml=3.0 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:34:19 37.5N 118.0W ML=2.8 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:35:29 37.5N 118.0W ML=3.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:47:04 37.5N 118.0W ML=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:51:34 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:57:35 37.5N 118.0W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:57:35 37.5N 118.0W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 10:13:19 37.5N 118.0W Mw=3.8 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 10:22:27 37.5N 118.0W ml=2.0 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 10:45:45 37.5N 118.0W ML=3.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 13:25:08 37.5N 118.0W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 13:27:37 37.5N 118.0W ML=2.0 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 14:39:26 37.5N 118.0W ML=3.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 14:41:47 37.5N 118.0W ml=2.1 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 14:51:42 37.5N 118.0W ML=2.8 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 15:08:00 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 17:38:23 37.5N 118.0W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 22:02:50 37.5N 118.0W ml=2.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 07:13:45 37.5N 118.0W ML=2.1 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151480 37.3N 118.3W 2.5-4.4 AAAAA California/Nevada area
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: 14MAR2023 08:32:41 31.5N 84.8E ML=4.0 EMSC WESTERN XIZANG
P: 6MAR2023 151266 30.0N 83.0E 3.8-5.2 CBAAA Xizang
P: 19MAR2023 151543 31.0N 88.0E 3.8-5.4 BACAA Xizang
O: 15MAR2023 02:32:23 35.1N 81.4E mb=4.7 EMSC XINJIANG-XIZANG BORDER REGION
P: 18MAR2023 151507 35.0N 78.0E 3.8-5.2 BABAA Northern India
O: 14MAR2023 21:31:15 52.1N 159.0E mb=4.0 EMSC OFF EAST COAST OF KAMCHATKA
O: 14MAR2023 10:01:14 51.7N 159.6E mb=5.0 EMSC OFF EAST COAST OF KAMCHATKA
P: 12MAR2023 151598 52.0N 160.0E 4.0-5.7 AAAAA E. of Kamchatka
INDONESIA AND PHILIPPINES
O: 14MAR2023 10:31:33 2.2S 100.4E ML=4.0 EMSC KEP. MENTAWAI REGION, INDONESI
P: 11MAR2023 151426 2.0S 100.0E 4.0-5.6 BAAAA So. of Sumatera
O: 14MAR2023 10:23:52 2.3N 128.1E mb=4.5 EMSC HALMAHERA, INDONESIA
P: 13MAR2023 151404 3.0N 127.0E 4.0-5.5 AAAAA Halmahera
P: 15MAR2023 151405 3.0N 129.0E 4.0-5.5 AAAAA Halmahera
O: 14MAR2023 13:50:37 5.6N 127.0E ML=4.5 EMSC MINDANAO, PHILIPPINES
P: 13MAR2023 151405 5.0N 127.0E 4.0-5.5 AAAAA Halmahera
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 14MAR2023 13:58:39 15.2N 94.6W ML=4.2 EMSC OFF COAST OF OAXACA, MEXICO
P: 15MAR2023 151435 16.0N 94.0W 3.5-5.3 AAAAA Chiapas, Mexico
O: 14MAR2023 20:43:45 16.4N 99.6W ML=4.2 EMSC OFFSHORE GUERRERO, MEXICO
O: 14MAR2023 20:21:37 16.3N 99.6W ML=4.0 EMSC OFFSHORE GUERRERO, MEXICO
P: 17MAR2023 151453 17.0N 99.0W 3.5-5.5 BAAAA Oaxaca, Mexico
O: 14MAR2023 20:55:43 17.5S 69.7W mb=4.2 EMSC SOUTHERN PERU
P: 9MAR2023 151358 17.0S 69.0W 4.0-5.6 BAAAA So. Peru/Bolivia
O: 14MAR2023 16:19:38 18.5N 105.5W ML=4.0 EMSC OFF COAST OF JALISCO, MEXICO
P: 15MAR2023 151447 19.0N 105.0W 3.5-5.3 AAAAA Michoacan, Mexico
O: 15MAR2023 04:43:07 18.6N 73.7W ML=3.6 EMSC HAITI REGION
P: 17MAR2023 151456 20.0N 74.0W 3.4-5.3 ABAAA Puerto Rico
O: 15MAR2023 06:36:26 18.6N 106.8W mb=4.5 EMSC OFF COAST OF JALISCO, MEXICO
P: 15MAR2023 151437 19.0N 107.0W 3.5-5.5 AAAAA Coast of Jalisco, Mexico
O: 15MAR2023 06:55:06 19.2N 66.5W Md=3.4 EMSC PUERTO RICO REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 AAAAA Puerto Rico
O: 15MAR2023 03:30:08 19.2N 70.0W ML=3.0 EMSC DOMINICAN REPUBLIC
P: 13MAR2023 151456 19.0N 71.0W 3.4-5.3 AAAAA Puerto Rico
O: 14MAR2023 07:11:16 27.0S 71.2W ML=4.1 EMSC OFFSHORE ATACAMA, CHILE
P: 16MAR2023 151645 28.0S 71.0W 4.0-5.8 AAAAA Coast Central Chile
O: 14MAR2023 19:56:39 38.4S 75.1W Mw=5.5 EMSC OFF COAST OF ARAUCANIA, CHILE
P: 14MAR2023 151658 38.0S 74.0W 4.0-5.4 AAAAA Central Chile
AFRICA AND EUROPE
O: 15MAR2023 06:27:08 34.5N 32.5E mb=4.2 EMSC CYPRUS REGION
P: 16MAR2023 151535 34.0N 32.0E 3.5-5.2 AAAAA Turkey
NEIC reported this earthquake of M 4.2 in Cyprus was felt with intensity II-III in the area(s) of Cyprus in Pafos, Pissouri and Lemesos.
O: 14MAR2023 16:36:03 35.6N 22.1E Mw=5.4 EMSC CENTRAL MEDITERRANEAN SEA
P: 14MAR2023 151502 36.0N 22.0E 3.0-4.7 AAAAA No. Greece
O: 15MAR2023 03:29:55 37.2N 36.3E ML=4.1 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 14MAR2023 14:49:48 37.9N 37.4E mb=4.8 EMSC CENTRAL TURKEY
O: 15MAR2023 05:49:34 38.0N 37.5E ML=4.0 EMSC CENTRAL TURKEY
P: 14MAR2023 151537 38.0N 39.0E 3.5-5.1 AAAAA Turkey
NEIC reported this earthquake of M 4.8 in Central Turkey was felt with intensity II-III in the area(s) of Central Turkey in Gaziantep.
SOUTHWEST PACIFIC
O: 15MAR2023 00:36:46 13.2S 167.1E mb=4.9 EMSC VANUATU
P: 18MAR2023 151641 13.0S 166.0E 4.0-5.6 BAAAA Vanuatu Islands
O: 15MAR2023 01:16:17 19.4S 173.4W mb=4.6 EMSC TONGA
P: 15MAR2023 151652 20.0S 174.0W 4.0-5.5 AAAAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 15MAR2023 03:39:51 0.9N 29.2W mb=5.0 EMSC CENTRAL MID-ATLANTIC RIDGE
P: 11MAR2023 151397 1.0N 26.0W 4.0-5.6 BACAA Central Mid-Atlantic Ridg
O: 14MAR2023 12:31:25 28.1N 16.2W ML=2.2 EMSC CANARY ISLANDS, SPAIN REGION
P: 7MAR2023 151186 28.0N 16.0W 3.0-4.5 CAAAA Canary Islands
ZEALANDIA AND AUSTRALIA REGION
O: 14MAR2023 23:45:26 29.7S 179.1W mb=4.6 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151659 30.0S 177.0W 4.0-5.4 AABAA No. Kermadec Islands
O: 14MAR2023 12:34:28 32.6S 179.6E ML=4.2 EMSC SOUTH OF KERMADEC ISLANDS
P: 16MAR2023 151662 32.0S 180.0E 4.0-5.4 AAAAA So. Kermadec Islands
JAPAN AND KURIL ISLANDS
O: 14MAR2023 21:39:05 35.5N 140.2E mb=4.1 EMSC NEAR EAST COAST OF HONSHU, JAP
O: 14MAR2023 21:05:07 36.1N 139.9E mb=4.3 EMSC EASTERN HONSHU, JAPAN
P: 14MAR2023 151510 36.0N 140.0E 4.0-5.4 AAAAA Off East Coast Honshu
NEIC reported these earthquakes of M 4.1 and M 4.3 in Honshu, Japan were felt with intensity II-III in the area(s) of Tokyo, Saitma, Ibaraki and Kanagawa Prefectures, Japan.
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 14MAR2023 10:03:58 30.5N 116.3W ML=3.3 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
O: 14MAR2023 09:28:24 30.6N 116.1W ML=3.8 EMSC OFFSHORE BAJA CALIFORNIA, MEXICO
P: 17MAR2023 151515 30.7N 116.3W 2.5-4.8 AAAAA So. California
O: 14MAR2023 19:42:16 31.1N 114.3W ML=3.5 EMSC GULF OF CALIFORNIA
O: 14MAR2023 08:25:53 31.5N 114.6W ML=3.4 EMSC GULF OF CALIFORNIA
P: 15MAR2023 151464 30.0N 114.0W 3.5-4.9 ABAAA Gulf of California
O: 14MAR2023 14:42:40 32.3N 115.3W Ml=2.5 EMSC BAJA CALIFORNIA, MEXICO
P: 16MAR2023 151517 32.4N 115.8W 2.5-4.9 AAAAA So. California
NEIC reported this earthquake of M 2.4 in Southern California was felt with intensity II-III in the area(s) of Southern California in Calipatria.
O: 15MAR2023 01:21:16 33.2N 115.6W Ml=2.1 EMSC SOUTHERN CALIFORNIA
P: 16MAR2023 151519 32.9N 115.6W 2.5-4.7 AAAAA So. California
O: 14MAR2023 20:32:51 38.2N 122.3W Md=2.4 EMSC NORTHERN CALIFORNIA
O: 15MAR2023 02:09:25 37.9N 122.2W Md=2.0 EMSC SAN FRANCISCO BAY AREA, CALIF.
P: 12MAR2023 151486 38.0N 122.3W 2.5-4.6 AAAAA Central California
P: 14MAR2023 151487 38.5N 122.7W 2.5-4.8 AAAAA Central California
NEIC reported this earthquake of M 2.4 in San Francisco, California was felt with intensity II-III in the area(s) of San Francisco, California in Vallejo, San Ramon.
O: 14MAR2023 23:47:44 40.9N 123.7W Md=2.7 EMSC NORTHERN CALIFORNIA
P: 13MAR2023 151569 40.6N 124.9W 2.5-4.7 AAAAA Off Coast of No. Calif
O: 14MAR2023 17:47:48 36.7N 121.3W ML=2.6 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 18:57:20 36.7N 121.3W Md=2.4 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 18:58:35 36.7N 121.4W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 19:15:55 36.7N 121.3W ML=2.8 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 05:42:15 36.7N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 15MAR2023 05:42:15 36.7N 121.3W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 17:41:44 36.7N 121.4W ML=3.1 EMSC CENTRAL CALIFORNIA
P: 12MAR2023 151484 36.8N 121.3W 2.5-4.7 AAAAA Central California
O: 14MAR2023 09:25:08 37.5N 118.0W ML=3.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:32:51 37.5N 118.0W ml=3.0 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:34:19 37.5N 118.0W ML=2.8 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:35:29 37.5N 118.0W ML=3.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:47:04 37.5N 118.0W ML=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:51:34 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:57:35 37.5N 118.0W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 09:57:35 37.5N 118.0W ml=2.6 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 10:13:19 37.5N 118.0W Mw=3.8 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 10:22:27 37.5N 118.0W ml=2.0 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 10:45:45 37.5N 118.0W ML=3.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 13:25:08 37.5N 118.0W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 13:27:37 37.5N 118.0W ML=2.0 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 14:39:26 37.5N 118.0W ML=3.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 14:41:47 37.5N 118.0W ml=2.1 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 14:51:42 37.5N 118.0W ML=2.8 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 15:08:00 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 17:38:23 37.5N 118.0W ML=2.7 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 22:02:50 37.5N 118.0W ml=2.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 07:13:45 37.5N 118.0W ML=2.1 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151480 37.3N 118.3W 2.5-4.4 AAAAA California/Nevada area
ALASKA
O: 14MAR2023 07:54:53 57.8N 154.6W ML=3.1 EMSC KODIAK ISLAND REGION, ALASKA
P: 5MAR2023 151338 58.0N 154.5W 3.2-5.0 CAAAA Central Alaska
NEIC reported this earthquake of M 3.7 in Southern Alaska was felt with intensity II-III in the area(s) of Southern Alaska in Bethel.
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
No events of M>=2 were located in the northwestern U.S. or western Canada today.
ROCKY MOUNTAINS REGION
O: 14MAR2023 10:25:04 42.6N 111.3W Ml=2.2 EMSC SOUTHERN IDAHO
P: 13MAR2023 151585 42.5N 111.5W 2.0-4.2 AAAAA Yellowstone/Wyoming
O: 14MAR2023 12:37:23 31.6N 104.5W ML=2.6 EMSC WESTERN TEXAS
O: 14MAR2023 20:28:25 31.6N 104.3W ML=2.7 EMSC WESTERN TEXAS
O: 14MAR2023 09:59:42 31.7N 104.3W ML=2.4 EMSC WESTERN TEXAS
O: 14MAR2023 09:59:42 31.7N 104.3W ML=2.4 EMSC WESTERN TEXAS
O: 14MAR2023 12:14:47 31.6N 104.3W ML=2.1 EMSC WESTERN TEXAS
P: 12MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 14MAR2023 22:47:33 32.5N 102.0W mb=3.1 EMSC WESTERN TEXAS
P: 17MAR2023 151514 32.6N 101.6W 2.0-4.0 BAAAA SW U.S.A
EASTERN U.S./CANADA
O: 14MAR2023 21:33:28 35.9N 97.9W ML=2.4 EMSC OKLAHOMA
O: 14MAR2023 19:46:51 36.3N 95.8W ML=2.1 EMSC OKLAHOMA
P: 14MAR2023 151534 36.0N 97.0W 2.0-4.2 AAAAA Southern Plains
HAWAII
No earthquakes of M>=3 were located in Hawaii.
STRONG EARTHQUAKE SHAKES PAPUA NEW GUINEA
EARTHQUAKE SUMMARY FOR MARCH 13, 2023
The strongest earthquake in the world today was an M 6.3 in Papua New Guinea. NEIC reported it was felt with maximum intensity V in Madang, and Lae Morobe with IV in Kainantu and Mount Hagen and III in Kerma and Port Moresby, Papua New Guinea. This event about 100 km northwest of an M 7.7 in Eastern New Guinea of September 10, 2022 is probably a regional aftershock of that event. That mainshock occurred with the second strongest geomagnetic storm in 16 years and the full moon. Forecast 151421 had expected today's event within about 100 km was likely around March 15.
O: 14MAR2023 00:49:09 5.4S 146.9E Mw=6.3 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 15MAR2023 151421 5.0S 146.0E 4.0-5.5 AAAAA New Ireland
Seismicity remained high today in the Queen Charlotte Islands area of Canada. An M 4.2 in the Haida Gwaii was lightly felt in the area today. This area has been active at this level of seismicity for the past two days. It was reported in the previous issues of this summary as:
"The strongest earthquakes in the U.S. or Canada today occurred as an M 4.3 near Vancouver Island and as an M 3.8 in the Queen Charlotte Islands area of British Columbia. These were not reported felt. This may related to a nor'easter hitting the northeastern U.S. at this time. Larger earthquakes in the Vancouver and Queen Charlotte Island area of Canada often occur in conjunction with strong nor'easters on the opposite side of the North American Plate.
The M 3.8 in the Queen Charlotte Islands region is the strongest in that area since an M 4.5 on December 24, 2022 and an aftershock of M 4.0 on the same date. The last earthquake of M>=5 in this region was an M 5.1 on June 4, 2022. At the time this summary noted in this regard:
"An unusual M 5.1 also occurred today in the Queen Charlotte Islands area of British Columbia, Canada. NEIC reported it was felt in this area at Prince Rupert. This is the strongest earthquake in the Queen Charlotte Islands region within about 200 km of this epicenter since an M 5.6 on July 5, 2019 following an M 6.2 on July 4, 2019. Those events occurred during a strong activation of the western edge of North America Plate which included several strong earthquakes in central California." (June 4, 2022)
Forecast 151596 had expected this event was likely around March 12, 2023 within about 100 km." (March 12-13, 2023)
O: 13MAR2023 13:58:59 52.7N 132.3W MB=4.4 ECAN of Village of Queen Charlotte, BC
O: 13MAR2023 13:59:00 52.8N 132.2W mb=4.2 EMSC QUEEN CHARLOTTE ISLANDS REGION
P: 12MAR2023 151596 54.0N 133.0W 3.0-5.3 ABAAA British Colombia
A series of light earthquakes, including an M 3.8 also occurred in Central California east of Mammoth Lakes on the Nevada border today. This may mark the beginning of a period of enhanced seismicity in the region of California which has been relatively quiet in recent weeks. This often occurs as a regional acceleration of seismicity associated with strong nor'easters as noted in regard to the activity in Queen Charlotte Islands of the past several days. This area in Central California is at 103 degrees from the recent major earthquakes in Turkey and could see a moderate event in the next several weeks. The last earthquake in this region of stronger magnitude was an M 4.8 on January 6, 2022. At the time this summary noted in this regard:
"A pair of earthquakes of M 4.8 preceded the aftershock off northern California today. The first event of M 4.8 near Mina, Nevada was reported by NEIC to have been felt with intensity II-III in Nevada at Luning, Silverpeak, Gabbs, Goldfield, Hawthorne, Round Mountain (IV), Tonopah (IV) and Glenbrook and in California at Bishop and Yosemite National Park. The second about 100 km to the south of the first, occurred about an hour before and may have helped trigger the aftershock off the coast of California. … An M 2.2 foreshock occurred near local solar noon within about 25 km of this epicenter. The last earthquake of M>=4.8 within about 50 km of this epicenter occurred on February 14, 2015 about 30 km to the south of today's epicenter on February 14, 2015, the only such earthquake in the area in the past 30 years. An M 5.7 about 100 km northeast of today's M 4.8 occurred on August 1, 1999. … Like a light earthquake in the Lake Erie, Ohio area yesterday this, and other events in Nevada and California today may have been prompted by the strong meteorological storm of the past two days along the East Coast of the U.S. If this is true, a strong to major event in the western zone of the North and Central American tectonic plate is still a distinct possibility in the next several days." (January 6, 2022)
The nor'easter storm in the area of New England today (as occurred with the event of January 6 in California) may have helped promote today's swarm in Central California.
NEIC reported this earthquake of M 3.8 in Nevada was felt with intensity II-III in the area(s) of Nevada in Silverpeak. Forecast 151479 had expected today's activity within about 50 km was likely around March 16. This epicenter is located at 103 degrees from the major activity in Turkey of February and at the same distance from the M 7.2 in Tajikistan of February 23 and may have been promoted by energy from those sources.
O: 14MAR2023 04:19:31 37.4N 117.7W ML=2.0 EMSC NEVADA
O: 14MAR2023 06:11:19 37.4N 117.7W ml=2.5 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 04:11:29 37.5N 118.0W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 04:26:21 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 05:00:28 37.5N 118.0W ML=3.5 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 05:00:28 37.5N 118.0W ML=3.8 ANSS CENTRAL CALIFORNIA
O: 14MAR2023 05:32:43 37.2N 117.7W ml=2.4 EMSC CENTRAL CALIFORNIA
P: 16MAR2023 151479 37.2N 117.3W 2.5-4.8 AAAAA California/Nevada area
Earthquakes of M 3.6 also occurred today in southern Idaho and western Texas and in southern Colorado. These are in regions which have recently seen seismic enhancement and may be aftershocks of those earlier events. The area of Yellowstone National Park in Wyoming, which has not been active in recent days also showed a strong swarm of events including 10 of magnitude 2.0-3.0 but no mainshock. This activity centered around local solar noon and may have been promoted by strong tidal stresses which maximize near this hour. The last swarm of this type in Yellowstone occurred from September 18-21, 2022 and was closely associated with the M 7.6 in Michoacan, Mexico of September 19, 2022. Forecasts 151587 and 151586 had expected enhanced seismicity in the Yellowstone area was likely around March 15-16.
O: 13MAR2023 17:03:28 44.6N 111.0W Ml=2.7 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 17:26:26 44.6N 111.0W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 18:31:36 44.6N 111.0W ML=2.2 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 19:47:38 44.6N 111.1W Ml=2.4 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 19:50:53 44.6N 111.1W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 19:59:40 44.6N 111.0W Ml=2.2 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 20:45:32 44.6N 111.1W Ml=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 21:00:22 44.6N 111.1W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, MONTANA
O: 13MAR2023 16:20:19 44.6N 111.0W Ml=2.2 EMSC YELLOWSTONE NAT. PARK, WYOMING
P: 15MAR2023 151587 44.8N 111.9W 2.0-4.4 AAAAA Yellowstone/Wyoming
P: 16MAR2023 151586 44.2N 110.8W 2.0-4.3 BAAAA Yellowstone/Wyoming
A moderate earthquake of M 4.6 was felt in the area of the Dominican Republic today. NEIC reported it was felt with intensity II-III in the Dominican Republic in Juan Adrian Monsenor Nouel, Bajos de Haina, El Carril, San Cristobal, Santo Domingo and El Seibo. A foreshock of M 3.9 hit to the east of this minutes before the M 4.6. NEIC reported this foreshock was felt with intensity II-III in Otra Banda, Santo Domingo and El Carril, Dominican Republic. The last earthquake of equal or larger magnitude in the Dominican Republic was an M 5.0 about 50 km south of this on February 1, 2023. At the time this summary noted:
"A moderate earthquake of M 5.0 shook regions of the Dominican Republic today. NEIC reported maximum intensity V in the Dominican Republic at Matanzas, Pizarrete, San Cristobal, IV in Bani, Sabana Buey (VI), Bajos de Haina, El Carril, San Jose de Ocoa and Santo Domingo with lesser shaking throughout most of the Dominican Republic. Local news reported it initially with M 5.3-5.6. It occurred on the Enriquillo-Plantain Garden fault south of Santo Domingo and was most strongly felt from Barahona to Santo Domingo and Santiago. It was also felt as far as the Bahamas, Turks and Caicos Islands, Haiti and Puerto Rico. Widespread panic accompanied the earthquake and some businesses evacuated employees. Structural damage was reported in three schools in the Matanzas area. This included cracks and fallen plaster and ceiling tiles. Classes were suspended for the day. The last earthquake with M>=5.0 in the Dominican Republic and within about 200 km of today's epicenter was an M 5.2 about 200 km northwest of this epicenter on September 23, 2018. The last similar event was an M 5.1 on July 7, 2012 - an aftershock of an M 5.5 on January 5, 2012." (February 1, 2023)
Forecast 151456 had expected this earthquake within about 50 km was likely
around March 13, 2023.
O: 13MAR2023 09:04:59 18.5N 70.4W mb=4.6 EMSC DOMINICAN REPUBLIC
P: 13MAR2023 151456 19.0N 71.0W 3.4-5.3 AAAAA Puerto Rico
O: 13MAR2023 16:22:00 19.1N 69.6W ML=3.0 EMSC DOMINICAN REPUBLIC
O: 13MAR2023 07:22:59 19.4N 68.2W Md=3.9 EMSC DOMINICAN REPUBLIC REGION
P: 16MAR2023 151461 20.0N 68.0W 3.0-4.9 BAAAA Bahamas/No. Caribbean
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: 13MAR2023 08:59:56 27.6N 53.3E mb=4.6 EMSC SOUTHERN IRAN
P: 16MAR2023 151473 29.0N 53.0E 3.5-5.1 BBAAA So. Iran/Persian Gulf
O: 13MAR2023 13:42:10 34.5N 82.0E mb=4.0 EMSC WESTERN XIZANG
P: 18MAR2023 151507 35.0N 78.0E 3.8-5.2 BACAA Northern India
No significant (M>=5) or unusual earthquakes were reported in Asia today.
INDONESIA AND PHILIPPINES
O: 13MAR2023 19:29:49 0.1S 123.1E ML=4.1 EMSC SULAWESI, INDONESIA
P: 14MAR2023 151396 0.0N 122.0E 4.0-5.6 AAAAA Celebes Sea
P: 18MAR2023 151407 0.0N 123.0E 4.0-5.4 BAAAA Mindanao, Philippines
NEIC reported this earthquake of M 4.2 in Indonesia was felt with intensity II-III in the area(s) of Indonesia in Bitung, Sulawesi.
O: 14MAR2023 00:31:05 0.2S 125.3E ML=4.5 EMSC MOLUCCA SEA
O: 14MAR2023 03:27:52 0.7N 125.3E mb=4.2 EMSC MOLUCCA SEA
O: 13MAR2023 20:26:48 0.1S 125.2E ML=4.5 EMSC MOLUCCA SEA
P: 9MAR2023 151131 1.0N 126.0E 4.0-5.5 BBAAA Mindanao, Philippines
O: 13MAR2023 10:16:44 1.5N 128.5E ML=4.1 EMSC HALMAHERA, INDONESIA
P: 11MAR2023 151404 1.0N 127.0E 4.0-5.4 AABAA Halmahera
O: 14MAR2023 02:43:09 2.4N 126.1E ML=4.2 EMSC MOLUCCA SEA
P: 13MAR2023 151404 3.0N 127.0E 4.0-5.5 AAAAA Halmahera
O: 14MAR2023 03:25:32 4.3N 96.7E ML=4.2 EMSC NORTHERN SUMATRA, INDONESIA
P: 17MAR2023 151409 5.0N 97.0E 4.0-5.4 BAAAA Nicobar Islands
O: 14MAR2023 00:49:09 5.4S 146.9E Mw=6.3 EMSC EASTERN NEW GUINEA REG., P.N.G
P: 15MAR2023 151421 5.0S 146.0E 4.0-5.5 AAAAA New Ireland
O: 13MAR2023 22:05:34 7.5S 128.3E mb=4.2 EMSC KEPULAUAN BARAT DAYA, INDONESIA
O: 13MAR2023 10:55:53 7.4S 130.4E mb=4.8 EMSC KEP. TANIMBAR REGION, INDONESI
P: 8MAR2023 151134 7.0S 130.0E 4.0-5.4 BAAAA Banda Sea
O: 13MAR2023 21:46:07 11.9S 166.1E mb=5.0 EMSC SANTA CRUZ ISLANDS
P: 12MAR2023 151640 11.0S 167.0E 4.0-5.5 AAAAA Vanuatu Islands
O: 13MAR2023 12:52:06 14.4N 123.1E mb=4.5 EMSC LUZON, PHILIPPINES
O: 13MAR2023 10:24:32 14.4N 123.1E mb=4.7 EMSC LUZON, PHILIPPINES
P: 11MAR2023 151443 13.0N 124.0E 3.5-4.9 ABAAA Luzon, Philippines
P: 16MAR2023 151443 14.0N 121.0E 3.5-5.0 BABAA Luzon, Philippines
NEIC reported these earthquakes of M 4.5 and M 4.7 in Bicol, Philippines was felt with intensity II-III in the area(s) of Bicol, Philippines in Mercedes (IV).
O: 13MAR2023 21:53:46 20.8N 121.6E mb=4.7 EMSC BATAN ISL REGION, PHILIPPINES
P: 20MAR2023 151474 21.0N 120.0E 4.0-5.4 CABAA Taiwan
CENTRAL AND SOUTH AMERICA
O: 14MAR2023 05:07:00 6.8N 73.0W mb=4.5 EMSC NORTHERN COLOMBIA
P: 17MAR2023 151400 7.0N 73.0W 4.0-5.6 BAAAA Colombia
O: 13MAR2023 18:54:04 8.4S 80.1W ML=4.2 EMSC OFF COAST OF NORTHERN PERU
P: 11MAR2023 151422 9.0S 81.0W 4.0-5.6 AAAAA No. Peru
O: 14MAR2023 02:57:22 14.4N 93.3W ML=4.1 EMSC OFFSHORE CHIAPAS, MEXICO
O: 14MAR2023 02:55:38 14.6N 93.1W ML=4.5 EMSC OFFSHORE CHIAPAS, MEXICO
P: 16MAR2023 151434 14.0N 93.0W 3.5-5.1 AAAAA Chiapas, Mexico
O: 13MAR2023 14:56:42 15.2S 75.8W mb=4.7 EMSC NEAR COAST OF CENTRAL PERU
O: 14MAR2023 04:29:35 15.2S 75.9W ML=4.5 EMSC NEAR COAST OF CENTRAL PERU
P: 15MAR2023 151633 16.0S 74.0W 4.0-5.5 AABAA So. Peru/Bolivia
NEIC reported this earthquake of M 5.1 in Southern Peru was felt with intensity II-III in the area(s) of Southern Peru in Tacna, Moquegua, Arica, Punta de Bombon, Arequipa and Iquique.
O: 13MAR2023 22:06:02 15.8N 95.5W ML=4.1 EMSC OFFSHORE OAXACA, MEXICO
P: 15MAR2023 151452 16.0N 96.0W 3.5-5.3 AAAAA Oaxaca, Mexico
O: 13MAR2023 19:19:15 17.7S 70.3W mb=5.1 EMSC SOUTHERN PERU
P: 14MAR2023 151634 18.0S 72.0W 4.0-5.8 AABAA So. Peru/Bolivia
O: 13MAR2023 11:42:53 18.0N 67.0W Md=3.0 EMSC PUERTO RICO
P: 13MAR2023 151454 18.0N 67.0W 3.4-5.4 AAAAA Puerto Rico
O: 13MAR2023 10:58:50 18.3N 64.1W Md=3.8 EMSC VIRGIN ISLANDS REGION
P: 15MAR2023 151441 18.0N 64.0W 3.0-5.1 AAAAA Leeward Islands
O: 13MAR2023 18:49:31 18.3N 105.8W mb=4.3 EMSC OFF COAST OF JALISCO, MEXICO
P: 15MAR2023 151447 19.0N 105.0W 3.5-5.3 AAAAA Michoacan, Mexico
O: 13MAR2023 09:04:59 18.5N 70.4W mb=4.6 EMSC DOMINICAN REPUBLIC
P: 13MAR2023 151456 19.0N 71.0W 3.4-5.3 AAAAA Puerto Rico
O: 13MAR2023 10:22:16 19.0N 66.5W Md=3.0 EMSC PUERTO RICO REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 AAAAA Puerto Rico
O: 14MAR2023 03:43:29 19.1N 72.6W ML=3.1 EMSC HAITI REGION
P: 13MAR2023 151456 19.0N 71.0W 3.4-5.3 AABAA Puerto Rico
O: 13MAR2023 16:22:00 19.1N 69.6W ML=3.0 EMSC DOMINICAN REPUBLIC
O: 13MAR2023 07:22:59 19.4N 68.2W Md=3.9 EMSC DOMINICAN REPUBLIC REGION
P: 16MAR2023 151461 20.0N 68.0W 3.0-4.9 BAAAA Bahamas/No. Caribbean
O: 13MAR2023 09:56:34 19.6N 65.4W Md=3.4 EMSC PUERTO RICO REGION
P: 14MAR2023 151455 19.0N 66.0W 3.4-5.5 AAAAA Puerto Rico
O: 13MAR2023 10:14:49 24.1S 66.7W mb=4.5 EMSC SALTA, ARGENTINA
P: 9MAR2023 151364 24.0S 68.0W 4.0-5.7 BAAAA Argentina
O: 13MAR2023 22:50:45 28.2S 67.6W Mw=5.2 EMSC CATAMARCA, ARGENTINA
P: 14MAR2023 151644 28.0S 68.0W 4.0-5.6 AAAAA Argentina
AFRICA AND EUROPE
O: 14MAR2023 06:47:34 38.1N 36.9E ML=4.7 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 BAAAA Turkey
NEIC reported this earthquake of M 4.6 in Gaziantep, Turkey was felt with intensity II-III in the area(s) of Gaziantep, Turkey.
No significant (M>=5) or unusual earthquakes were reported in Europe today.
SOUTHWEST PACIFIC
O: 13MAR2023 20:21:46 21.0S 179.1W mb=4.7 EMSC FIJI REGION
P: 15MAR2023 151652 20.0S 178.0W 4.0-5.5 AAAAA Tonga Islands
No significant (M>=5) or unusual earthquakes were reported in the Southwest Pacific region today.
OCEAN RIDGES
O: 14MAR2023 04:27:19 32.5N 19.0W mb=4.1 EMSC MADEIRA ISLANDS, PORTUGAL REGI
No significant (M>=5) or unusual earthquakes were reported on Ocean Ridges today.
ZEALANDIA AND AUSTRALIA REGION
O: 13MAR2023 08:14:56 31.4S 178.8E ML=4.5 EMSC KERMADEC ISLANDS REGION
P: 16MAR2023 151662 32.0S 180.0E 4.0-5.4 BAAAA So. Kermadec Islands
O: 13MAR2023 13:40:51 31.5S 177.8W mb=5.0 EMSC KERMADEC ISLANDS REGION
P: 14MAR2023 151662 32.0S 179.0W 4.0-5.4 AAAAA So. Kermadec Islands
O: 13MAR2023 16:40:37 35.4S 179.8E ML=4.0 EMSC OFF E. COAST OF N. ISLAND, N.Z
P: 15MAR2023 151660 35.0S 179.0E 3.0-4.6 AAAAA North Island, N.Z.
O: 13MAR2023 09:29:42 37.3S 177.6E MS=4.1 GEONET Off East coast of North Island, New Zealand.
O: 13MAR2023 09:29:42 37.3S 177.6E ML=4.1 EMSC OFF E. COAST OF N. ISLAND, N.Z
P: 14MAR2023 151660 38.0S 178.0E 3.0-4.4 AAAAA North Island, N.Z.
GEONET reported 136 people reported feeling this earthquake with 77 at weak intensity and 56 with light shaking and 3 with moderate intensity.
O: 14MAR2023 00:56:11 37.4S 174.3E ML=4.0 EMSC NORTH ISLAND OF NEW ZEALAND
P: 13MAR2023 151664 40.0S 175.0E 3.0-4.4 ACAAA North Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 13MAR2023 19:29:30 36.8N 140.6E ML=4.0 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 14MAR2023 151503 37.0N 139.0E 3.5-5.0 AAAAA No. Honshu, Japan
O: 14MAR2023 04:36:30 37.9N 141.8E ML=4.2 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 14MAR2023 151503 37.0N 139.0E 3.5-5.0 AABAA No. Honshu, Japan
P: 17MAR2023 151531 38.0N 143.0E 4.0-5.4 BAAAA So. of Honshu
O: 13MAR2023 14:29:53 44.7N 149.7E mb=4.9 EMSC KURIL ISLANDS
O: 13MAR2023 14:40:18 45.6N 148.7E mb=4.8 EMSC KURIL ISLANDS
P: 16MAR2023 151580 45.0N 150.0E 3.5-5.5 BAAAA So. Kurils
O: 13MAR2023 20:35:36 39.9N 141.8E mb=4.5 EMSC EASTERN HONSHU, JAPAN
P: 6MAR2023 151275 40.0N 142.0E 3.5-5.4 CAAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 13MAR2023 17:09:33 30.6N 116.5W ML=3.5 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 13MAR2023 151515 30.9N 116.3W 2.5-4.8 AAAAA So. California
O: 13MAR2023 22:14:01 34.2N 116.9W ML=2.9 EMSC SOUTHERN CALIFORNIA
P: 8MAR2023 151248 33.9N 116.9W 2.5-4.7 BAAAA So. California
NEIC reported this earthquake of M 3.1 in Southern California was felt with intensity II-III in the area(s) of Southern California in Angelus Oaks, Big Bear Lake, Big Bear City, Highland, Redlands, Apple Valley, San Bernardino and Landers among others.
O: 13MAR2023 11:42:52 34.6N 119.5W Ml=2.2 EMSC SOUTHERN CALIFORNIA
P: 12MAR2023 151525 34.7N 119.0W 2.5-4.9 AAAAA So. California
O: 14MAR2023 05:18:06 36.6N 120.7W Md=2.1 EMSC CENTRAL CALIFORNIA
P: 12MAR2023 151484 36.8N 121.3W 2.5-4.7 AAAAA Central California
O: 14MAR2023 04:19:31 37.4N 117.7W ML=2.0 EMSC NEVADA
O: 14MAR2023 06:11:19 37.4N 117.7W ml=2.5 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 04:11:29 37.5N 118.0W Md=2.2 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 04:26:21 37.5N 118.0W ml=2.3 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 05:00:28 37.5N 118.0W ML=3.5 EMSC CENTRAL CALIFORNIA
O: 14MAR2023 05:32:43 37.2N 117.7W ml=2.4 EMSC CENTRAL CALIFORNIA
P: 16MAR2023 151479 37.2N 117.3W 2.5-4.8 AAAAA California/Nevada area
O: 14MAR2023 04:11:29 37.5N 118.0W Md=2.2 EMSC CENTRAL CALIFORNIA
P: 14MAR2023 151480 37.3N 118.3W 2.5-4.4 AAAAA California/Nevada area
O: 14MAR2023 02:51:11 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 12MAR2023 151487 38.7N 122.7W 2.5-4.7 AAAAA Central California
ALASKA
O: 13MAR2023 23:46:49 51.9N 178.1W ML=3.4 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
P: 11MAR2023 151593 51.0N 178.1W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians
O: 13MAR2023 09:04:12 56.2N 149.6W ml=3.3 EMSC GULF OF ALASKA
O: 13MAR2023 12:00:41 56.2N 149.4W ml=3.1 EMSC GULF OF ALASKA
O: 13MAR2023 12:02:04 56.1N 149.7W ml=3.0 EMSC GULF OF ALASKA
P: 15MAR2023 151588 54.8N 148.7W 3.5-4.9 ABAAA Alaska Peninsula
O: 13MAR2023 16:03:32 60.1N 152.9W ML=3.3 EMSC SOUTHERN ALASKA
P: 13MAR2023 151615 60.8N 151.7W 3.2-4.9 AAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 13MAR2023 13:58:59 52.7N 132.3W MB=4.4 ECAN of Village of Queen Charlotte, BC
O: 13MAR2023 13:59:00 52.8N 132.2W mb=4.2 EMSC QUEEN CHARLOTTE ISLANDS REGION
P: 12MAR2023 151596 54.0N 133.0W 3.0-5.3 ABAAA British Colombia
ROCKY MOUNTAINS REGION
O: 14MAR2023 04:22:45 37.2N 104.7W ML=3.6 EMSC COLORADO
O: 13MAR2023 08:48:18 37.2N 104.7W mb=2.4 EMSC COLORADO
P: 12MAR2023 151491 37.2N 104.9W 2.0-4.0 AAAAA Colorado area
NEIC reported this earthquake of M 3.6 in Southern Colorado was felt with intensity II-III in the area(s) of Southern Colorado in Aguilar, Weston and Trinidad.
O: 13MAR2023 14:13:51 31.7N 104.3W ML=2.0 EMSC WESTERN TEXAS
O: 13MAR2023 15:16:39 31.7N 104.4W ML=2.6 EMSC WESTERN TEXAS
O: 13MAR2023 15:32:44 31.7N 104.3W ML=2.2 EMSC WESTERN TEXAS
O: 13MAR2023 21:21:16 31.7N 104.3W ML=3.4 EMSC WESTERN TEXAS
O: 14MAR2023 01:15:01 31.7N 104.4W ML=2.6 EMSC WESTERN TEXAS
O: 14MAR2023 03:50:27 31.7N 104.3W ML=3.1 EMSC WESTERN TEXAS
P: 12MAR2023 151513 32.5N 104.6W 2.0-4.0 AAAAA SW U.S.A
O: 13MAR2023 13:48:39 32.4N 102.1W ML=2.4 EMSC WESTERN TEXAS
P: 17MAR2023 151514 32.6N 101.6W 2.0-4.0 BAAAA SW U.S.A
O: 13MAR2023 22:22:51 46.5N 116.9W Ml=2.4 EMSC NORTHERN IDAHO
P: 10MAR2023 151285 47.7N 117.4W 2.0-4.1 BBAAA Montana/Idaho
O: 13MAR2023 17:03:28 44.6N 111.0W Ml=2.7 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 17:26:26 44.6N 111.0W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 18:31:36 44.6N 111.0W ML=2.2 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 19:47:38 44.6N 111.1W Ml=2.4 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 19:50:53 44.6N 111.1W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 19:59:40 44.6N 111.0W Ml=2.2 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 20:45:32 44.6N 111.1W Ml=2.5 EMSC YELLOWSTONE NAT. PARK, WYOMING
O: 13MAR2023 21:00:22 44.6N 111.1W Ml=2.0 EMSC YELLOWSTONE NAT. PARK, MONTANA
O: 13MAR2023 16:20:19 44.6N 111.0W Ml=2.2 EMSC YELLOWSTONE NAT. PARK, WYOMING
P: 15MAR2023 151587 44.8N 111.9W 2.0-4.4 AAAAA Yellowstone/Wyoming
P: 16MAR2023 151586 44.2N 110.8W 2.0-4.3 BAAAA Yellowstone/Wyoming
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.
UNUSUAL QUAKE HITS EAST OF SOUTH ISLAND, NEW ZEALAND
EARTHQUAKE SUMMARY FOR MARCH 12, 2023
An unusual earthquake of M 4.7 occurred today off the east coast of South Island, New Zealand. It was followed by an aftershock of M 3.7. These events were not reported felt in this remote area. This is in an area where the last earthquake of M>=4.7 occurred more than 35 years ago and is the only such event in the area since modern seismology reported epicenters accurately. It occurred near local solar noon and may have been promoted by high tidal stresses with the full moon as it occurred near the longitude of maximum tidal stress with that alignment as noted in previous issues of this summary:
"The full moon will arrive on March 7, 2023 at 12:40 UT. Longitudes which are near local solar noon at this time are located near 10 West longitude and those at local solar midnight at 170 East longitude. In the west these include areas of western Europe and the mid-Atlantic Rift as far as Iceland to the South Sandwich Islands and the southern Mid-Atlantic and in the east areas near local solar midnight at the time of this full moon include the Vanuatu-Tonga-Fiji-Kermadec Islands and New Zealand and in the north the western Aleutians. These are the most like regions to experience strong tidal triggering within about a week of this full moon. They include a number of areas near the IDL which could see a strong to major earthquake at this time." (March 4-6, 2023)
O: 13MAR2023 01:37:16 44.0S 177.0E mb=4.7 EMSC OFF E. COAST OF S. ISLAND, N.Z
O: 13MAR2023 04:58:36 44.1S 177.0E ML=3.7 EMSC OFF E. COAST OF S. ISLAND, N.Z.
P: 13MAR2023 151664 40.0S 175.0E 3.0-4.4 ACBAA North Island, N.Z.
The strongest earthquake in the world today was an M 5.7 in the Santa Cruz Islands north of Vanuatu. The last earthquake in the Santa Cruz Islands of M>=5.7 was an M 5.7 on December 5, 2022 and an M 5.8 on November 16, 2022. At the time of this event this summary noted:
"The strongest earthquake in the world today was an M 5.8 in the Santa Cruz Islands east of the Solomon Islands. NEIC reported it was lightly felt in the epicentral area near Lata. The only earthquake of larger magnitude in the Santa Cruz Islands in the past two years was an M 6.0 on November 25, 2021 about 100 km north of today's epicenter. This appears to be part of the regional activation of the area which began with the major earthquakes of November 9-12 in Fiji and Tonga." (November 16, 2022)
Forecast 151640 had expected today's earthquake within about 150 km was likely
around March 12, 2023.
The M 5.7 was followed half a day later by an M 5.1 about 250 km northeast of its epicenter. This is the strongest earthquake in northern Santa Cruz Islands since an M 5.3 on April 19, 2022 and a M 6.0 on November 25, 2021. Forecast 151640 had expected this event within about 25 km was likely around March 12.
O: 12MAR2023 07:43:21 12.0S 165.8E Mw=5.7 EMSC SANTA CRUZ ISLANDS
P: 12MAR2023 151640 11.0S 167.0E 4.0-5.5 AAAAA Vanuatu Islands
O: 12MAR2023 20:56:51 10.8S 166.9E Mw=5.1 EMSC SANTA CRUZ ISLANDS
P: 12MAR2023 151640 11.0S 167.0E 4.0-5.5 AAAAA Vanuatu Islands
A series of moderate earthquakes occurred today in the aftershock zone of the major earthquakes of February, 2023 in Turkey. These included an M 4.7, the largest since an M 4.7 on March 5. The last event of larger magnitude in the aftershock area was an M 5.0 on March 3, 2023. NEIC reported these earthquakes of M 4.2, 4.3 and M 4.7 in The Turkey-Syria border were felt with intensity II-III in the area(s) of The Turkey-Syria border at Gaziantep, and Mersin, Icel, Turkey. Forecast 151537 had expected this enhanced activity in the area was likely in mid-March.
O: 13MAR2023 02:23:14 36.8N 36.5E mb=4.2 EMSC TURKEY-SYRIA BORDER REGION
P: 13MAR2023 151537 36.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 12MAR2023 12:31:22 38.0N 36.3E mb=4.3 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 BAAAA Turkey
O: 13MAR2023 01:34:30 38.1N 38.7E mb=4.7 EMSC EASTERN TURKEY
O: 13MAR2023 02:13:53 38.1N 38.7E mb=4.4 EMSC EASTERN TURKEY
P: 14MAR2023 151537 38.0N 39.0E 3.5-5.1 AAAAA Turkey
The strongest earthquakes in the U.S. or Canada today occurred as an M 4.3 near Vancouver Island and as an M 3.8 in the Queen Charlotte Islands area of British Columbia. These were not reported felt. This may related to a nor'easter hitting the northeastern U.S. at this time. Larger earthquakes in the Vancouver and Queen Charlotte Island area of Canada often occur in conjunction with strong nor'easters on the opposite side of the North American Plate.
The M 3.8 in the Queen Charlotte Islands region is the strongest in that area since an M 4.5 on December 24, 2022 and an aftershock of M 4.0 on the same date. The last earthquake of M>=5 in this region was an M 5.1 on June 4, 2022. At the time this summary noted in this regard:
"An unusual M 5.1 also occurred today in the Queen Charlotte Islands area of British Columbia, Canada. NEIC reported it was felt in this area at Prince Rupert. This is the strongest earthquake in the Queen Charlotte Islands region within about 200 km of this epicenter since an M 5.6 on July 5, 2019 following an M 6.2 on July 4, 2019. Those events occurred during a strong activation of the western edge of North America Plate which included several strong earthquakes in central California." (June 4, 2022)
Forecast 151596 had expected this event was likely around March 12, 2023 within about 100 km.
O: 12MAR2023 07:22:03 52.8N 132.0W MB=3.8 ECAN S of Daajing Giids, BC
O: 12MAR2023 07:22:03 52.8N 132.0W ML=3.8 EMSC QUEEN CHARLOTTE ISLANDS REGION
P: 12MAR2023 151596 54.0N 133.0W 3.0-5.3 ABAAA British Colombia
P: 20MAR2023 151596 53.0N 132.0W 3.0-5.4 CAAAA British Colombia
The M 4.3 in the Vancouver Island area today was the strongest in that region since an M 4.6 on August 8, 2022 and an M 4.3 on September 21, 2021, the only such event in the past two years. An M 5.4 hit the area on July 22, 2022. At the time this summary noted in this regard:
"The M 5.1-5.4 in Vancouver, Canada was reported by NEIC to have been felt with intensity II-III in British Columbia, Canada at Ucluelet, Parksville, Victoria, and in Washington State, US., at Lopez Island, Blaine, Ferndale, Bellingham, Lynden, and Freeland. About four minutes after the M 7.8 in Alaska an M 4.6 was recorded in the Vancouver Island area, probably triggered by S- and Surface waves from the Alaska Peninsula. This event was noted in this summary in the previous issue as:
"A moderate earthquake of M 4.6 was recorded in the Queen Charlotte Sound, Canada about four minutes after the M 7.8 in the Alaska Peninsula. S-waves and surface waves take about this time to travel the 17 degrees between these epicenter and were present in the Queen Charlotte Sound, Canada at the time of the M 4.6." (July 22, 2020)
The Vancouver event is the strongest in the region within about 200 km of this epicenter during the current year - an event of M 6.3 last hit on December 25, 2019,
part of a regional activation that began on December 23, 2019." (July 22, 2020)
Forecast 151583 had expected today's earthquake within about 100 km of this epicenter was likely around March 11. This activity is located at 101 degrees from the M 7.6 in the Banda Sea of January 9 and at the fourth node (90 degrees) from the major earthquakes in Turkey of February and from the M 7.2 in Tajikistan on February 23, 2023 and also at the fourth node from the M 6.9 in the Kermadec Islands of March 4, 2023 and was probably promoted by energy from those sources.
O: 12MAR2023 15:31:53 48.9N 129.9W MB=4.3 ECAN WSW of Port Alice, BC
O: 12MAR2023 15:31:56 49.1N 129.4W mb=4.4 EMSC VANCOUVER ISLAND, CANADA REGIO
P: 11MAR2023 151583 48.7N 129.0W 2.8-5.0 AAAAA Vancouver Island area
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: 12MAR2023 11:43:43 24.3N 94.7E mb=4.8 EMSC MYANMAR-INDIA BORDER REGION
P: 13MAR2023 151469 24.0N 94.0E 4.0-5.4 AAAAA Myanmar
O: 13MAR2023 00:11:51 24.9N 122.0E ML=4.0 EMSC TAIWAN REGION
O: 13MAR2023 00:11:51 24.8N 122.0E ML=4.1 TAI Hualien, Taiwan
P: 11MAR2023 151472 25.0N 124.0E 4.0-5.4 AABAA Ryukyu Islands
CWB reported this earthquake was felt with intensity III in Yilan, II in Taipei and I in Taoyuan and Hualien Counties, Taiwan.
O: 12MAR2023 11:33:57 36.5N 71.0E mb=4.6 EMSC HINDU KUSH REGION, AFGHANISTAN
P: 12MAR2023 151495 36.0N 71.0E 3.8-5.5 AAAAA Hindu Kush/Pakistan
O: 12MAR2023 11:43:17 36.6N 58.6E ML=4.0 EMSC NORTHEASTERN IRAN
P: 3MAR2023 151235 37.0N 59.0E 3.8-5.6 CAAAA No. Iran
O: 12MAR2023 09:32:41 38.1N 73.0E mb=4.3 EMSC TAJIKISTAN
P: 16MAR2023 151496 38.0N 73.0E 3.8-5.5 BAAAA Hindu Kush/Pakistan
O: 12MAR2023 15:26:17 39.2N 67.4E mb=4.4 EMSC EASTERN UZBEKISTAN
P: 7MAR2023 151222 37.0N 69.0E 3.8-5.3 BCAAA Hindu Kush/Pakistan
INDONESIA AND PHILIPPINES
O: 12MAR2023 07:09:44 1.6S 138.3E ML=4.2 EMSC NEAR N COAST OF PAPUA, INDONES
P: 12MAR2023 151430 2.0S 138.0E 4.0-5.4 AAAAA West Irian, PNG
O: 13MAR2023 03:09:43 4.1S 129.0E ML=4.0 EMSC BANDA SEA
P: 9MAR2023 151152 3.0S 130.0E 4.0-5.4 BBAAA West Irian, PNG
No significant (M>=5) or unusual earthquakes were reported in Indonesia or the Philippines today.
CENTRAL AND SOUTH AMERICA
O: 12MAR2023 20:26:44 6.8N 73.1W mb=4.2 EMSC NORTHERN COLOMBIA
P: 17MAR2023 151400 7.0N 73.0W 4.0-5.6 BAAAA Colombia
O: 12MAR2023 12:04:30 8.0N 83.2W ML=4.1 EMSC COSTA RICA
P: 11MAR2023 151402 9.0N 84.0W 3.5-5.3 AAAAA Costa Rica
P: 17MAR2023 151402 8.0N 83.0W 3.5-5.4 BAAAA Costa Rica
O: 12MAR2023 18:29:47 10.1S 79.3W mb=4.5 EMSC OFF COAST OF CENTRAL PERU
P: 11MAR2023 151422 9.0S 81.0W 4.0-5.6 ABBAA No. Peru
O: 13MAR2023 03:11:49 3.8S 76.6W mb=4.7 EMSC NORTHERN PERU
P: 17MAR2023 151415 2.0S 78.0W 4.0-5.5 BBBAA Ecuador
O: 13MAR2023 01:11:35 12.4N 90.2W mb=4.3 EMSC OFF THE COAST OF EL SALVADOR
P: 8MAR2023 151161 14.0N 90.0W 3.5-5.1 BBAAA Guatemala
O: 12MAR2023 18:08:32 12.6N 88.3W ML=4.1 EMSC OFFSHORE EL SALVADOR
P: 12MAR2023 151449 12.0N 88.0W 3.5-5.2 AAAAA Nicaragua
O: 12MAR2023 18:46:09 17.8N 95.5W ML=4.0 EMSC VERACRUZ, MEXICO
O: 12MAR2023 20:35:44 16.6N 94.5W ML=4.0 EMSC OAXACA, MEXICO
O: 12MAR2023 22:18:50 17.6N 94.8W ML=4.1 EMSC VERACRUZ, MEXICO
P: 11MAR2023 151435 17.0N 94.0W 3.5-5.2 AAAAA Chiapas, Mexico
O: 12MAR2023 22:02:05 18.0N 66.8W Md=3.5 EMSC PUERTO RICO
P: 13MAR2023 151454 18.0N 67.0W 3.4-5.4 AAAAA Puerto Rico
O: 13MAR2023 05:01:29 18.0N 105.3W ML=4.1 EMSC OFF COAST OF COLIMA, MEXICO
P: 15MAR2023 151447 19.0N 105.0W 3.5-5.3 AAAAA Michoacan, Mexico
O: 12MAR2023 13:31:52 18.2N 69.1W ML=3.3 EMSC DOMINICAN REPUBLIC REGION
P: 16MAR2023 151454 18.0N 69.0W 3.4-5.3 BAAAA Puerto Rico
O: 13MAR2023 01:00:49 18.7N 66.8W Md=3.0 EMSC PUERTO RICO REGION
P: 13MAR2023 151454 18.0N 67.0W 3.4-5.4 AAAAA Puerto Rico
O: 12MAR2023 07:01:33 24.4S 67.3W mb=4.3 EMSC SALTA, ARGENTINA
P: 9MAR2023 151364 24.0S 68.0W 4.0-5.7 BAAAA Argentina
AFRICA AND EUROPE
O: 13MAR2023 02:23:14 36.8N 36.5E mb=4.2 EMSC TURKEY-SYRIA BORDER REGION
P: 13MAR2023 151537 36.0N 36.0E 3.5-5.2 AAAAA Turkey
O: 12MAR2023 12:31:22 38.0N 36.3E mb=4.3 EMSC CENTRAL TURKEY
P: 17MAR2023 151537 38.0N 36.0E 3.5-5.2 BAAAA Turkey
O: 13MAR2023 01:34:30 38.1N 38.7E mb=4.7 EMSC EASTERN TURKEY
O: 13MAR2023 02:13:53 38.1N 38.7E mb=4.4 EMSC EASTERN TURKEY
P: 14MAR2023 151537 38.0N 39.0E 3.5-5.1 AAAAA Turkey
NEIC reported an earthquake of M 4.2 in Romania was felt with intensity II-III in the area(s) of Romania in Buzau with VI in Nehoiu, Comandau and V in Ivesti, Galati with II-III in Buzau at Colti, Guru Teghii, Magura, Berca, Brasov, and in Sihlea, Vrancea and Salcia Prahova.
SOUTHWEST PACIFIC
O: 12MAR2023 23:51:11 5.4S 154.3E mb=5.2 EMSC BOUGAINVILLE REGION, P.N.G.
P: 13MAR2023 151419 7.0S 154.0E 4.0-5.5 ABAAA New Britain
O: 12MAR2023 20:56:51 10.8S 166.9E Mw=5.1 EMSC SANTA CRUZ ISLANDS
P: 12MAR2023 151640 11.0S 167.0E 4.0-5.5 AAAAA Vanuatu Islands
O: 12MAR2023 07:43:21 12.0S 165.8E Mw=5.7 EMSC SANTA CRUZ ISLANDS
P: 12MAR2023 151640 11.0S 167.0E 4.0-5.5 AAAAA Vanuatu Islands
O: 13MAR2023 06:11:33 17.5S 178.7W mb=5.0 EMSC FIJI REGION
P: 11MAR2023 151638 17.0S 177.0W 4.0-5.4 AABAA Tonga Islands
O: 12MAR2023 12:57:17 22.2S 179.5W mb=4.4 EMSC SOUTH OF FIJI ISLANDS
P: 15MAR2023 151652 20.0S 178.0W 4.0-5.5 BCBAA Tonga Islands
OCEAN RIDGES
O: 13MAR2023 06:49:22 58.8S 25.2W mb=4.9 EMSC SOUTH SANDWICH ISLANDS REGION
P: 14MAR2023 151672 60.0S 26.0W 4.0-5.6 ABAAA So. Sandwich Islands
ZEALANDIA AND AUSTRALIA REGION
O: 13MAR2023 01:37:16 44.0S 177.0E mb=4.7 EMSC OFF E. COAST OF S. ISLAND, N.Z
O: 13MAR2023 04:58:36 44.1S 177.0E ML=3.7 EMSC OFF E. COAST OF S. ISLAND, N.Z.
P: 13MAR2023 151664 40.0S 175.0E 3.0-4.4 ACBAA North Island, N.Z.
JAPAN AND KURIL ISLANDS
O: 12MAR2023 21:17:52 29.5N 130.7E mb=4.7 EMSC RYUKYU ISLANDS, JAPAN
P: 11MAR2023 151498 31.0N 132.0E 3.5-4.9 ABAAA Kyushu, Japan area
O: 12MAR2023 20:25:33 39.5N 142.5E mb=4.3 EMSC NEAR EAST COAST OF HONSHU, JAP
P: 17MAR2023 151551 40.0N 143.0E 3.5-5.6 BAAAA Hokkaido, Japan
U.S./CANADA*
WESTERN U.S./CANADA
CALIFORNIA
O: 12MAR2023 18:24:26 30.6N 116.3W ML=3.9 EMSC OFFSHORE BAJA CALIFORNIA, MEXI
P: 13MAR2023 151515 30.9N 116.3W 2.5-4.8 AAAAA So. California
O: 13MAR2023 05:06:21 31.8N 115.8W Ml=3.0 EMSC BAJA CALIFORNIA, MEXICO
P: 16MAR2023 151517 32.4N 115.8W 2.5-4.9 BAAAA So. California
O: 12MAR2023 13:20:39 38.8N 122.8W Md=2.2 EMSC NORTHERN CALIFORNIA
P: 12MAR2023 151487 38.7N 122.7W 2.5-4.7 AAAAA Central California
O: 12MAR2023 12:19:57 40.6N 124.0W Md=2.0 EMSC NORTHERN CALIFORNIA
P: 13MAR2023 151569 40.6N 124.9W 2.5-4.7 AAAAA Off Coast of No. Calif
O: 12MAR2023 22:33:38 41.4N 123.4W Md=2.5 EMSC NORTHERN CALIFORNIA
P: 15MAR2023 151568 40.7N 122.3W 2.5-4.4 BAAAA Northern California
ALASKA
O: 12MAR2023 11:52:32 51.4N 178.3W ml=3.7 EMSC ANDREANOF ISLANDS, ALEUTIAN IS
O: 12MAR2023 17:04:20 51.9N 178.1W ML=3.0 EMSC ANDREANOF ISLANDS, ALEUTIAN IS.
P: 11MAR2023 151593 51.0N 178.1W 3.5-5.1 AAAAA Andreanoff Isls, Aleutians
O: 12MAR2023 09:30:16 52.2N 174.1E mb=3.9 EMSC NEAR ISLANDS, ALEUTIAN ISLANDS
P: 14MAR2023 151608 52.0N 175.0E 4.0-5.8 AAAAA Rat Islands
O: 12MAR2023 16:58:41 59.0N 154.3W ML=3.0 EMSC SOUTHERN ALASKA
P: 5MAR2023 151338 58.0N 154.5W 3.2-5.0 CAAAA Central Alaska
PACIFIC NORTHWESTERN U.S./WESTERN CANADA
O: 12MAR2023 15:31:53 48.9N 129.9W MB=4.3 ECAN WSW of Port Alice, BC
O: 12MAR2023 15:31:56 49.1N 129.4W mb=4.4 EMSC VANCOUVER ISLAND, CANADA REGIO
P: 11MAR2023 151583 48.7N 129.0W 2.8-5.0 AAAAA Vancouver Island area
O: 12MAR2023 07:22:03 52.8N 132.0W MB=3.8 ECAN S of Daajing Giids, BC
O: 12MAR2023 07:22:03 52.8N 132.0W ML=3.8 EMSC QUEEN CHARLOTTE ISLANDS REGION
P: 12MAR2023 151596 54.0N 133.0W 3.0-5.3 ABAAA British Colombia
P: 20MAR2023 151596 53.0N 132.0W 3.0-5.4 CAAAA British Colombia
ROCKY MOUNTAINS REGION
O: 13MAR2023 06:19:04 31.6N 104.0W ML=2.9 EMSC WESTERN TEXAS
O: 13MAR2023 01:26:10 31.7N 104.1W ML=2.2 EMSC WESTERN TEXAS
O: 13MAR2023 06:24:05 31.0N 103.7W ML=2.0 EMSC WESTERN TEXAS
P: 15MAR2023 151513 32.6N 103.6W 2.0-4.0 AAAAA SW U.S.A
EASTERN U.S./CANADA
O: 13MAR2023 03:20:12 47.6N 70.2W MB=0.9 ECAN of La Malbaie, QC
O: 13MAR2023 04:24:11 47.5N 70.0W MB=0.9 ECAN of La Pocatière, QC
O: 12MAR2023 03:15:53 47.5N 70.0W MB=0.6 ECAN of Saint-Pac├┤me, QC
O: 11MAR2023 17:45:57 47.5N 70.0W MB=1.0 ECAN of La Pocatière, QC
O: 11MAR2023 14:47:13 47.6N 70.2W MB=0.6 ECAN of La Malbaie, QC
O: 11MAR2023 02:31:13 47.4N 70.3W MB=1.0 ECAN of Saint-Bernard-de-l'Île-aux-Coudres, QC
O: 12MAR2023 07:39:24 47.8N 69.8W MB=1.0 ECAN of Saint-Siméon, QC
P: 12MAR2023 151558 47.0N 70.0W 2.0-4.2 AAAAA Maine
O: 12MAR2023 05:28:42 46.3N 75.0W MB=1.3 ECAN of Nominingue, QC
P: 15MAR2023 151565 45.0N 75.0W 2.0-4.4 BBAAA New York State
O: 11MAR2023 08:28:56 43.9N 69.3W MB=2.0 ECAN of Augusta, ME
P: 12MAR2023 151557 44.0N 68.0W 2.0-4.1 AAAAA Maine
O: 10MAR2023 03:15:54 44.4N 79.0W MB=1.4 ECAN of Woodville, ON
P: 12MAR2023 151573 46.0N 81.0W 2.0-4.1 ABBAA Ohio/Lake Erie
HAWAII
No earthquakes of M>=3 were located in Hawaii.