STRONG GEOMAGNETIC STORM MAY INCREASE SEISMICITY

 

EARTHQUAKE SUMMARY FOR APRIL 20, 2018

 

The geomagnetic field saw minor storm conditions today. The AP level was 47. High latitude geomagnetic field was also stormy with AP at 56. KP levels at high latitude reached 7 mid-day on April 20. It is likely this was triggered by an undetected CME from the sun. This is the most active the geomagnetic field has been since it reached AP 47 on November 8, 2017 with high latitude AP 82. This could launch a new round of increased seismicity beginning April 21 with most likely strong quakes near the geomagnetic equator and at high latitudes around April 24-27, but this may change depending on how long the storm lasts (it is not expected to be a long-lived event).

 

The earthquake of M 3.6-4.1 yesterday in Michigan occurred as this geomagnetic storm hit the earth and was probably triggered by it.

 

Several moderate earthquakes including an M 4.9 and 4.1 occurred today in Greece during a major geomagnetic storm. An M 4.7 in The region of Halkidiki and Thessalonika was felt with intensity V in Sikea and IV in Polikhronon, Kalivai Poliyirou, Ayios Paulos with lesser shaking in Kalamaria, Pilaia, Ambelokipoi, Thessalonika, Greece. This region often sees increased seismicity during geomagnetic storms. It is part of the general activation of the Anatolian Fault zone in recent weeks.

 

O: 21APR2018 01:34:41  39.9N   23.8E mb=4.1  EMSC   AEGEAN SEA                   

O: 21APR2018 00:20:03  40.0N   23.6E mb=4.9  EMSC   AEGEAN SEA                    

P: 19APR2018 116000    40.0N   23.0E 3.0-5.2 AAAAA  Romania/NW Turkey          

 

An M 2.5 quake was widely felt in the San Francisco Bay area today. NEIC reported intensity II-III for this event from Danville, Diablo, Alamo, San Ramon, Walnut Creek, Clayton, Moraga, Castro Valley, Dublin, Lafayette, Concord, Orinda, Concord, Oakland, Antioch, Martinez, Richmond, San Francisco, Livermore, Santa Clara, Manteca, Modesto, and Sacramento, California. NEIC reported an aftershock of M 2.6 in the San Francisco, California area was felt with intensity II-III in the area(s) of Danville, Lafayette and San Francisco, California.

 

O: 21APR2018 03:44:39  37.8N  122.0W MD=2.5  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 22APR2018 116189    37.7N  121.9W 2.5-4.6 AAAAA  Central California         

 

 

The strongest earthquake in the U.S. or Canada today was an M 3.9 in Oklahoma.

NEIC reported this earthquake of M 3.9 in Kansas was felt with intensity II-III in the area(s) of Deer Creek, Oklahoma and Caldwell, Kansas. Larger earthquakes in this region often occur with strong geomagnetic storms and high tidal stresses. Earthquakes of M 5.0 and 4.5 occurred in the area on April 9 and April 7, the strongest in the past half year. Forecast 115966 had expected an event within about 50 km of the M 3.9 was likely with magnitude up to M 3.9 around April 18.

 

O: 20APR2018 19:53:33  36.9N   97.6W mb=2.7  EMSC   OKLAHOMA                     

O: 20APR2018 19:27:04  36.9N   97.6W mb=2.9  EMSC   OKLAHOMA                     

O: 20APR2018 19:28:49  36.9N   97.6W mb=3.9  EMSC   OKLAHOMA                     

O: 20APR2018 19:15:54  37.0N   97.6W mb=2.6  EMSC   OKLAHOMA                     

P: 18APR2018 115966    37.0N   97.0W 2.0-3.9 AAAAA  Southern Plains            

 

The strongest earthquake in the world today was an M 5.1 in Burma (Myanmar). NEIC reported this earthquake of M 5.1 in Myanmar was felt with intensity II-III in the area(s) of Rangoon, Myanmar.  This appears to be an aftershock of the M 6.0 that hit the same epicenter on January 11, 2018. Forecast 115876 expected this event was likely within about 50 km of this epicenter around April 20.

 

O: 20APR2018 22:29:23  18.4N   96.1E Mw=5.1  EMSC   MYANMAR                      

P: 20APR2018 115876    19.0N   96.0E 4.0-5.4 AAAAA  Andaman Islands            

OTHER GLOBAL EARTHQUAKE ACTIVITY

 

For most events there are two listings. The first line is the observed event starting with "O:" for Observed. There follows the date, month and year, the time in UT hours:minutes:seconds, the latitude and longitude, the given magnitude and the reporting agency followed by the geographic location. The second line starts with "P:" This is the forecast event as forecast in our summaries normally more than a month in advance. Magnitudes may vary in response to updated seismic watches and daily variations due to tidal and other influences. This line has the forecast date, month and year, the forecast number, latitude, longitude and forecast magnitude range.  This is followed by a comparison between the forecast and the event. The comparison includes letters A-D. The first is number of days difference from predicted (A:up to 2, B3-5; C:6-10; D:more than 10), Difference in latitude (A:up to 1 degree; B:1-2 degrees; C:2-4 degrees; D:more than 4 degrees); longitude (same comparison as with latitude); magnitude (A: within forecast range; B: higher than forecast range; C: lower than forecast range; D: no comparison possible). The last letter is a stand in for a future comparison which needs to be done statistically after a large number of forecasts have been made. In previous data, an excellent match is generally AAAAA; a good match as one or two B's; a fair match has several B's and C's and a poor match is one which contains a number of C's or D's. 

 

ASIA

 

O: 20APR2018 22:29:23  18.4N   96.1E Mw=5.1  EMSC   MYANMAR                      

P: 20APR2018 115876    19.0N   96.0E 4.0-5.4 AAAAA  Andaman Islands            

 

O: 20APR2018 08:28:01  25.2N   95.5E mb=4.3  EMSC   MYANMAR                      

P: 28APR2018 116168    25.0N   97.0E 4.0-5.6 CABAA  Myanmar                    

 

O: 20APR2018 11:40:03  37.2N   71.9E mb=4.4  EMSC   TAJIKISTAN                   

P: 20APR2018 115940    38.0N   73.0E 3.8-5.6 AAAAA  Hindu Kush/Pakistan        

 

INDONESIA AND PHILIPPINES

 

O: 20APR2018 15:10:58   3.0S  127.8E ML=4.2  EMSC   CERAM SEA, INDONESIA         

P: 23APR2018 116111     4.0S  128.0E 4.0-5.6 BAAAA  Ceram area                 

 

O: 20APR2018 04:05:12   5.9N  127.6E mb=4.6  EMSC   PHILIPPINE ISLANDS REGION    

P: 20APR2018 115849     4.0N  129.0E 4.0-5.6 ABBAA  Halmahera                  

 

O: 21APR2018 05:06:47   7.4S  126.6E mb=4.8  EMSC   KEPULAUAN BARAT DAYA, INDONESI

P: 23APR2018 116108     7.0S  129.0E 4.0-5.5 AABAA  Banda Sea                  

P: 28APR2018 116108     8.0S  127.0E 4.0-5.7 CAAAA  Banda Sea                  

 

NEIC reported this earthquake of M 4.8 in East Timor was felt with intensity II-III in the area(s) of Dili, East Timor, Indonesia.

 

O: 20APR2018 23:16:35   9.4S  156.0E mb=4.7  EMSC   D'ENTRECASTEAUX ISLANDS REGION

P: 24APR2018 116127     9.0S  158.0E 4.0-5.6 BABAA  Solomon Islands            

 

O: 19APR2018 20:37:17  15.0N  122.7E MS=4.0  PHI  Felt with intensity III in Guina

P: 17APR2018 115890    14.0N  122.0E 3.5-5.0 AAAAA  Luzon, Philippines         

 

PHIVOLCS reported this earthquake was felt with intensity III in Guinayangan and Jomaliq, Quezon and II in Panukulan, Quezon, Philippines.

 

CENTRAL AND SOUTH AMERICA

 

O: 20APR2018 14:41:37   4.6N   82.3W ML=4.8  EMSC   SOUTH OF PANAMA              

P: 25APR2018 116101     7.0N   82.0W 3.5-5.0 BCAAA  Costa Rica                 

 

O: 20APR2018 09:53:23  15.1N   94.4W ML=4.0  EMSC   OFF COAST OF CHIAPAS, MEXICO 

P: 20APR2018 115880    14.0N   94.0W 3.5-5.1 ABAAA  Chiapas, Mexico            

 

O: 20APR2018 10:38:46  15.1N   94.6W ML=4.0  EMSC   OFF COAST OF OAXACA, MEXICO  

O: 20APR2018 09:53:23  15.0N   94.4W ML=4.0  UNAM  al SUROESTE de TONALA, CHIS *: 15.

O: 20APR2018 10:38:46  15.1N   94.6W ML=4.0  UNAM  al SURESTE de SALINA CRUZ, OAX *:

O: 20APR2018 09:48:40  15.6N   95.1W ML=4.1  UNAM  l SUR de SALINA CRUZ, OAX *: 15.6°

O: 20APR2018 08:59:24  15.6N   95.4W ML=4.0  UNAM  l SUROESTE de SALINA CRUZ, OAX *:

O: 20APR2018 08:59:24  15.7N   95.4W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

P: 22APR2018 116136    16.0N   95.0W 3.5-5.2 AAAAA  Chiapas, Mexico            

 

O: 20APR2018 09:48:13  16.2N   98.6W ML=4.0  EMSC   OFFSHORE OAXACA, MEXICO      

O: 20APR2018 09:48:13  16.2N   98.6W ML=4.0  UNAM  l SUROESTE de OMETEPEC, GRO *: 16.

P: 22APR2018 116153    15.0N   98.0W 3.5-5.3 ABAAA  Oaxaca, Mexico             

 

O: 21APR2018 05:03:54  22.0S   68.7W mb=4.5  EMSC   ANTOFAGASTA, CHILE           

P: 23APR2018 116345    21.0S   69.0W 4.0-5.4 AAAAA  Coast No. Chile            

 

 

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

 

AFRICA AND EUROPE

 

O: 20APR2018 12:20:10  36.9N   27.3E ML=3.9  EMSC   DODECANESE IS.-TURKEY BORDER R

P: 23APR2018 116240    36.0N   29.0E 3.5-5.1 BAAAA  Turkey                     

 

O: 20APR2018 05:41:54  38.9N   43.6E ML=3.6  EMSC   EASTERN TURKEY               

P: 19APR2018 115976    40.0N   44.0E 3.5-5.4 ABAAA  Caucasus/Caspian Sea       

 

O: 20APR2018 08:34:06  42.9N    4.6W ML=4.0  EMSC   SPAIN                        

P: 14APR2018 115999    42.0N    6.0W 3.0-5.1 CAAAA  Portugal                   

 

O: 21APR2018 01:34:41  39.9N   23.8E mb=4.1  EMSC   AEGEAN SEA                   

O: 21APR2018 00:20:03  40.0N   23.6E mb=4.9  EMSC   AEGEAN SEA                   

P: 19APR2018 116000    40.0N   23.0E 3.0-5.2 AAAAA  Romania/NW Turkey          

 

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

 

SOUTHWEST PACIFIC

 

O: 20APR2018 08:50:33  16.3S  174.9W mb=4.4  EMSC   TONGA                        

P: 14APR2018 116058    16.0S  174.0W 4.0-5.5 CAAAA  Tonga Islands              

 

O: 20APR2018 15:46:43  23.7S  179.6W mb=4.6  EMSC   SOUTH OF FIJI ISLANDS        

P: 24APR2018 116354    24.0S  180.0W 4.0-5.5 BAAAA  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: 20APR2018 19:30:36  29.9S  176.3W mb=5.0  EMSC   KERMADEC ISLANDS REGION      

P: 17APR2018 116067    28.0S  176.0W 4.0-5.4 BBAAA  No. Kermadec Islands       

 

JAPAN AND KURIL ISLANDS

 

O: 20APR2018 10:45:50  42.7N  144.6E mb=4.5  EMSC   HOKKAIDO, JAPAN REGION       

O: 20APR2018 19:10:53  43.3N  142.4E mb=4.1  EMSC   HOKKAIDO, JAPAN REGION       

P: 19APR2018 115978    41.0N  143.0E 3.5-5.6 ABAAA  Hokkaido, Japan            

 

O: 20APR2018 19:47:58  26.8N  142.5E mb=4.8  EMSC   BONIN ISLANDS, JAPAN REGION  

P: 20APR2018 115906    26.0N  143.0E 4.0-5.6 AAAAA  Bonin Islands              

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 20APR2018 10:22:13  32.6N  115.7W ML=2.1  EMSC   BAJA CALIFORNIA, MEXICO      

P: 18APR2018 115958    32.9N  115.6W 2.5-4.4 AAAAA  So. California             

 

O: 20APR2018 20:26:26  33.0N  116.4W ML=2.1  EMSC   SOUTHERN CALIFORNIA          

O: 21APR2018 01:13:55  33.1N  116.0W ML=2.5  EMSC   SOUTHERN CALIFORNIA          

P: 24APR2018 116219    32.8N  116.0W 2.5-4.4 BAAAA  So. California             

 

O: 20APR2018 15:25:17  33.5N  116.8W ML=2.3  EMSC   SOUTHERN CALIFORNIA          

O: 20APR2018 15:25:17  33.5N  116.8W ML=2.3  EMSC   SOUTHERN CALIFORNIA          

O: 20APR2018 12:33:02  33.7N  116.7W ML=2.9  EMSC   SOUTHERN CALIFORNIA          

P: 20APR2018 115960    33.4N  116.7W 2.5-4.5 AAAAA  So. California             

 

NEIC reported this earthquake of M 2.9 in Southern California was felt with intensity II-III in the area(s) of Idyllwild, Anza, Palm Springs, Hemet, Palm Springs, Cabazon, Mountain Center, Cathedral city, Rancho Mirage, San Jacinto, Palm Desert, Winchester, Temecula, Indian Wells, and in general within about 50 km of the epicenter.

 

O: 20APR2018 10:47:44  34.5N  116.5W ML=2.1  EMSC   SOUTHERN CALIFORNIA          

P: 22APR2018 116226    34.6N  116.7W 2.5-4.7 AAAAA  So. California             

 

O: 20APR2018 05:12:34  36.1N  120.2W MD=3.0  EMSC   CENTRAL CALIFORNIA           

O: 20APR2018 12:25:24  36.3N  120.4W MD=2.2  EMSC   CENTRAL CALIFORNIA           

P: 19APR2018 115931    36.1N  120.1W 2.5-5.0 AAAAA  Central California         

 

O: 20APR2018 12:05:17  36.9N  121.4W MD=2.5  EMSC   CENTRAL CALIFORNIA           

P: 19APR2018 115933    37.1N  121.5W 2.5-4.8 AAAAA  Central California         

 

NEIC reported this earthquake of M 2.5 in Central California was felt with intensity II-III in the area(s) of San Juan Bautista, California.

 

O: 21APR2018 03:44:39  37.8N  122.0W MD=2.5  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 22APR2018 116189    37.7N  121.9W 2.5-4.6 AAAAA  Central California         

 

O: 20APR2018 16:10:44  38.8N  122.8W MD=2.1  EMSC   NORTHERN CALIFORNIA          

P: 14APR2018 115935    38.5N  122.7W 2.5-4.4 CAAAA  Central California         

 

 

ALASKA

 

O: 20APR2018 07:47:08  57.6N  155.5W ML=3.7  EMSC   ALASKA PENINSULA             

O: 20APR2018 08:05:06  57.6N  155.6W ML=3.1  EMSC   ALASKA PENINSULA             

P: 21APR2018 116012    54.8N  158.7W 3.5-5.1 ACBAA  Alaska Peninsula           

 

NEIC reported these earthquakes of M 3.1 and M 3.7 in the Alaska Peninsula were felt with intensity II-III in the area(s) of Kodiak, Alaska.

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 20APR2018 18:01:57  43.1N  126.8W ML=3.1  EMSC   OFF COAST OF OREGON          

P: 22APR2018 116272    42.1N  126.9W 3.0-4.6 AAAAA  Off Coast of Oregon        

 

O: 21APR2018 07:07:27  60.9N  138.3W Ml=3.6  EMSC   SOUTHERN YUKON TERRITORY, CANA

P: 23APR2018 116307    61.0N  138.0W 3.2-4.9 AAAAA  Central Alaska             

 

ROCKY MOUNTAINS REGION

 

O: 20APR2018 21:37:23  46.9N  112.5W ML=2.6  EMSC   WESTERN MONTANA               

P: 15APR2018 115986    44.6N  112.0W 2.0-4.1 BCAAA  Montana/Idaho              

 

NEIC reported this earthquake of M 2.6 in Western Montana was felt with intensity II-III in the area(s) of Anaconda, Montana.

 

EASTERN U.S./CANADA

 

O: 20APR2018 19:53:33  36.9N   97.6W mb=2.7  EMSC   OKLAHOMA                     

O: 20APR2018 19:27:04  36.9N   97.6W mb=2.9  EMSC   OKLAHOMA                     

O: 20APR2018 19:28:49  36.9N   97.6W mb=3.9  EMSC   OKLAHOMA                     

O: 20APR2018 19:15:54  37.0N   97.6W mb=2.6  EMSC   OKLAHOMA                     

P: 18APR2018 115966    37.0N   97.0W 2.0-3.9 AAAAA  Southern Plains            

 

O: 20APR2018 15:19:57  35.6N   90.4W md=1.9  ANSS   W of Lepanto Arkansas        

P: 22APR2018 116203    35.0N   89.0W 2.0-4.2 AAAAA  New Madrid area            

P: 22APR2018 116203    36.0N   89.0W 2.0-3.9 AAAAA  New Madrid area            

 

HAWAII

 

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

 

 

EARTHQUAKE SHAKES MICHIGAN

 

EARTHQUAKE SUMMARY FOR APRIL 19, 2018

 

An earthquake of M 3.6-4.1 on the Michigan-Ontario border was widely felt in that area today. Earthquakes Canada reported this earthquake was felt in Windsor, Essex, Kingsville and Amherstburg, Ontario. NEIC reported intensity III-IV in Michigan through out an area about 200 km of the epicenter including at Grosselle, Rockwood, Trenton, Wyandotte, Rivervies, Southgate, Ecorse, Lincoln Park, River Rouge, Detroit, Allen Park, Flat Rock, Dearborn, Newport, Grosse Point among many other communities. NEIC reported it was felt with intensity IV in Ontario at Amherstburg, Harrow, Colchester, and lesser shaking in Tilbury, Chatham, Ridgetown, Sarnia, Paris, Brantford. It was also reported felt in Pennsylvania, Virginia, Ohio, and within about 500 km of the epicenter in Ohio at Bellville, Thompson, Chardon, Huron, Holland, Perrysburg, Woodville, Sylvania, Toledo, Oregon, Isle Saint George. When the USGS noted in a press release yesterday that an urban earthquake was likely in the near term in the U.S. Detroit, Michigan was probably not on their collective mind. The last earthquake within about 200 km of this epicenter in Michigan with M>=3.6 occurred May 2, 2015 about 200 km to the west of this epicenter with M 4.2. No earthquakes of M>=3.6 have hit this region within about 150 km in at least 25 years. Most of the regional activity occurs in Ohio which is where it had been expected at this time in the forecasts of this summary. This epicenter is located at the third node (120 degrees) from the M 7.0 in New Britain of March 29 and at the eighth node (45 degrees) from the M 8.0 in the Gulf of Alaska of January 23, 2018 and may have been promoted from these sources. Forecast 116274 had expected this activity was likely about 200 km to the east

of this epicenter around April 22.

 

 

O: 20APR2018 00:01:35  42.1N   83.1W Mw=3.6  EMSC   MICHIGAN                     

O: 20APR2018 00:01:35  42.1N   83.0W ML=4.1  NRCA  6 km ENE of Amherstburg

P: 22APR2018 116274    42.0N   80.0W 2.0-4.1 AABAA  Ohio/Lake Erie             

 

The swarm in central Nebraska also continued today with an M 3.3. NEIC reported this earthquake of M 3.3 in Nebraska was felt with intensity II-III in the area(s) of Callaway, Arnold, Merna, Stapleton, Broken Bow, Ansley, McCook, Grand Island, Omaha, Nebraska. This activity began April 9 with an M 3.3. The strongest event in the series was an M 3.7 on April 10. It is somewhat unusual for a long series to aftershocks to occur in this area and this may still be precursory to a larger event along the Pacific-North American Plate boundary to the west. Forecast 116238  expected today's aftershocks was likely around April 23.

 

O: 19APR2018 13:15:02  41.4N  100.2W mb=3.3  EMSC   NEBRASKA                      

P: 23APR2018 116238    41.0N  100.0W 2.0-4.0 BAAAA  Southern Plains            

 

The strongest earthquake of the day was an M 6.0 in the Prince Edward Islands on the South Indian Ridge south of South Africa. This is a remote oceanic area and this earthquake was not reported felt in this region. The last earthquake in the Prince Edward Islands region with M>=6 occurred on July 4, 2005 nearly 13 years ago. Other events of M>=6 in  the region occurred April 28, 1997 (M 6.6-6.8) and May 21, 1998 (M 6.3). Today's event occurred within about 30 minutes of local solar midnight and was likely promoted by high tidal stresses which maximize at this hour. This earthquake is at 101-103 degrees from the M 7.1 events in New Britain and was probably promoted from that source. Forecast 116084 had expected this event within about 200 km of the epicenter was likely around April 19.  The antipode at 42 N 138W is off the coast of Oregon in an aseismic region, but regional seismicity off Oregon could follow.

 

O: 19APR2018 21:09:17  42.8S   42.3E Mw=6.0  EMSC   PRINCE EDWARD ISLANDS REGION 

P: 19APR2018 116084    41.0S   43.0E 4.0-5.7 ABAAA  So. Indian Ocean           

 

The strongest earthquake in the U.S. or Canada today was an M 4.5 in the Unimak Island, Alaska. It was not reported felt in the region. A similar M 4.6 hit the area three days ago on April 16. The largest quake in this area in the past half year was an  M 5.1 on February 27, 2018. Forecast 116019 had expected today's activity was likely around April 21.

 

O: 19APR2018 14:37:11  53.8N  163.6W mb=4.5  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 21APR2018 116019    53.9N  165.3W 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: 20APR2018 05:25:06  24.3N  122.4E ML=4.6  TAI    Hualien, Taiwan              

P: 19APR2018 115917    25.0N  122.0E 4.0-5.4 AAAAA  Ryukyu Islands             

 

CWB reported this earthquake was felt with intensity III in Yilan; II in Hualien and I in Taipei, Nantou, Taichung, Taitung and Changhua Counties.

 

O: 20APR2018 04:16:02  18.4N   96.2E mb=4.8  EMSC   MYANMAR                      

P: 20APR2018 115876    19.0N   96.0E 4.0-5.4 AAAAA  Andaman Islands            

 

O: 19APR2018 22:52:38  31.3N   80.5E mb=4.0  EMSC   WESTERN XIZANG               

P: 16APR2018 115941    30.0N   79.0E 3.8-5.3 BBAAA  India                      

 

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

 

INDONESIA AND PHILIPPINES

 

O: 19APR2018 13:34:39   2.2N   96.3E mb=4.8  EMSC   SIMEULUE, INDONESIA          

P: 18APR2018 115852     2.0N   98.0E 4.0-5.6 AABAA  So. Sumatera               

 

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

 

CENTRAL AND SOUTH AMERICA

 

O: 19APR2018 16:52     32.8S   71.1W mb=4.1  GUC    Llaillay, Quillota, Zapallar;

P: 17APR2018 116076    33.0S   72.0W 4.0-5.4 AAAAA  Central Chile               

 

CSN reported this earthquake was felt with intensity V in  Llaillay, Quillota, Zapallar; III Rinconada; II Villa Alemana, Santiago, Tiltil, Felt in Valparaiso and Santiago, Chile.

 

O: 19APR2018 20:37:04  13.3N   90.0W ML=4.0  EMSC   OFFSHORE EL SALVADOR         

P: 17APR2018 115882    13.0N   89.0W 3.5-5.3 AAAAA  Coast of Central America   

 

O: 19APR2018 20:06:23  14.2N   93.4W ML=4.0  EMSC   OFF COAST OF CHIAPAS, MEXICO 

P: 14APR2018 115880    14.0N   93.0W 3.5-5.1 BAAAA  Chiapas, Mexico             

 

O: 19APR2018 20:08:41  14.2N   93.5W ML=4.3  EMSC   OFF COAST OF CHIAPAS, MEXICO 

O: 19APR2018 19:17:35  15.5N   92.4W ML=4.3  UNAM  l NOROESTE de MOTOZINTLA, CHIS *:

O: 19APR2018 20:06:23  14.1N   93.4W ML=4.0  UNAM  al SUROESTE de CD HIDALGO, CHIS *:

O: 19APR2018 20:08:41  14.1N   93.5W ML=4.3  UNAM  al SUROESTE de HUIXTLA, CHIS *: 14

O: 19APR2018 20:28:31  14.8N   93.8W ML=4.1  UNAM  al SUROESTE de PIJIJIAPAN, CHIS *:

O: 19APR2018 20:28:31  14.8N   93.8W ML=4.1  EMSC   OFFSHORE CHIAPAS, MEXICO     

O: 19APR2018 08:54:19  14.8N   94.1W ML=4.1  EMSC   OFF COAST OF CHIAPAS, MEXICO 

O: 19APR2018 08:54:19  14.8N   94.1W ML=4.1  UNAM  al SUROESTE de PIJIJIAPAN, CHIS *:

P: 20APR2018 115880    14.0N   94.0W 3.5-5.1 AAAAA  Chiapas, Mexico             

 

O: 19APR2018 19:17:35  15.6N   92.4W ML=4.3  EMSC   CHIAPAS, MEXICO              

P: 23APR2018 116135    15.0N   93.0W 3.5-5.2 BAAAA  Chiapas, Mexico            

 

O: 19APR2018 10:06:21  17.3N   95.2W mb=4.8  EMSC   OAXACA, MEXICO               

O: 19APR2018 09:20:41  16.4N   95.3W ML=4.1  UNAM   NORTE de TEHUANTEPEC, OAX *: 16.4

O: 19APR2018 10:06:21  17.1N   95.3W ML=4.8  UNAM  l NOROESTE de MATIAS ROMERO, OAX *

O: 19APR2018 10:10:40  17.4N   95.4W ML=4.0  UNAM  l SUR de J RODRIGUEZ CLARA, VER *:

P: 16APR2018 115881    17.0N   94.0W 3.5-5.1 BAAAA  Chiapas, Mexico            

 

O: 19APR2018 07:48:24  18.3N   68.4W Md=3.2  EMSC   MONA PASSAGE, DOMINICAN REPUBL

P: 17APR2018 115901    19.0N   69.0W 3.4-5.0 AAAAA  Puerto Rico                

 

O: 19APR2018 11:48:01  18.7N  106.5W ML=4.0  EMSC   OFF COAST OF JALISCO, MEXICO 

O: 19APR2018 11:48:01  18.7N  106.4W ML=4.0  UNAM  al SUROESTE de CIHUATLAN, JAL *: 1

P: 12APR2018 115883    18.0N  106.0W 3.5-5.2 CAAAA  Coast of Jalisco, Mexico   

P: 17APR2018 115894    19.0N  105.0W 3.5-5.1 AABAA  Michoacan, Mexico          

 

O: 19APR2018 10:21:13  20.2S   69.4W ML=4.0  EMSC   TARAPACA, CHILE              

P: 23APR2018 116345    21.0S   69.0W 4.0-5.4 BAAAA  Coast No. Chile            

 

O: 19APR2018 16:52:18  32.8S   71.1W Mw=4.2  EMSC   VALPARAISO, CHILE            

P: 17APR2018 116076    33.0S   72.0W 4.0-5.4 AAAAA  Central Chile              

 

NEIC reported this earthquake of M 4.2 in Central Chile was felt with intensity V in Valparsiao, Chile and II-III in the area(s) of Santiago, Chile.

 

 

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

 

AFRICA AND EUROPE

 

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

 

SOUTHWEST PACIFIC

 

O: 19APR2018 08:16:18  15.7S  177.4W mb=4.3  EMSC   FIJI REGION                  

P: 17APR2018 116053    15.0S  177.0W 4.0-5.4 AAAAA  Samoa Islands              

 

O: 19APR2018 19:43:59  17.2S  178.7W mb=4.2  EMSC   FIJI REGION                  

P: 17APR2018 116059    19.0S  178.0W 4.0-5.5 ABAAA  Tonga Islands              

 

O: 19APR2018 23:59:54  22.7S  175.0W mb=5.3  EMSC   TONGA REGION                 

P: 20APR2018 116072    23.0S  176.0W 4.0-5.7 AAAAA  Tonga Islands              

 

Note that this earthquake occurred within about 30 minutes of local solar noon

and was probably promoted by high tidal stresses which maximize at this hour.

 

 

OCEAN RIDGES

 

O: 19APR2018 21:09:17  42.8S   42.3E Mw=6.0  EMSC   PRINCE EDWARD ISLANDS REGION 

P: 19APR2018 116084    41.0S   43.0E 4.0-5.7 ABAAA  So. Indian Ocean           

 

O: 19APR2018 08:21:15  53.1S  140.3E mb=4.6  EMSC   WEST OF MACQUARIE ISLAND     

 

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: 19APR2018 13:16:50  39.0N  144.5E mb=4.5  EMSC   OFF EAST COAST OF HONSHU, JAPA

P: 18APR2018 115952    39.0N  142.0E 4.0-5.6 AABAA  Off East Coast Honshu      

 

O: 19APR2018 11:38:26  40.2N  142.5E mb=4.9  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 19APR2018 115978    41.0N  143.0E 3.5-5.6 AAAAA  Hokkaido, Japan            

 

NEIC reported this earthquake of M 4.9 in Northern Honshu, Japan was felt with intensity II-III in the area(s) of Misawa, Aomori, Japan.

 

U.S./CANADA*

 

WESTERN U.S./CANADA

 

CALIFORNIA

 

O: 19APR2018 23:51:46  36.1N  120.2W MD=2.9  EMSC   CENTRAL CALIFORNIA           

P: 19APR2018 115931    36.1N  120.1W 2.5-5.0 AAAAA  Central California         

 

O: 19APR2018 23:18:28  39.0N  122.6W ML=2.8  EMSC   NORTHERN CALIFORNIA          

P: 16APR2018 115935    38.7N  122.7W 2.5-4.4 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 Clearlake and Clearlake Oaks, California.

 

O: 19APR2018 19:37:40  39.6N  121.6W MD=2.2  EMSC   NORTHERN CALIFORNIA          

P: 22APR2018 116269    40.3N  121.2W 2.5-4.5 BAAAA  Northern California        

 

ALASKA

 

O: 19APR2018 07:04:35  51.1N  178.3W ML=3.9  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 18APR2018 116014    50.3N  176.2W 3.5-5.1 AAAAA  Andreanoff Isls, Aleutians 

 

O: 19APR2018 14:37:11  53.8N  163.6W mb=4.5  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 21APR2018 116019    53.9N  165.3W 3.5-5.0 AAAAA  Fox Islands, Aleutians     

 

O: 19APR2018 19:27:15  63.7N  152.6W Ml=3.1  EMSC   CENTRAL ALASKA               

P: 16APR2018 116036    62.8N  151.2W 3.2-4.9 BAAAA  Central Alaska             

 

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

 

PACIFIC NORTHWESTERN U.S./WESTERN CANADA

 

O: 20APR2018 00:44:54  47.4N  117.9W ML=2.3  EMSC   WASHINGTON                   

P: 19APR2018 115986    47.7N  117.4W 2.0-3.9 AAAAA  Montana/Idaho              

 

ROCKY MOUNTAINS REGION

 

O: 19APR2018 23:16:37  46.9N  112.5W ML=2.9  EMSC   WESTERN MONTANA              

P: 15APR2018 115986    44.6N  112.0W 2.0-4.1 BCAAA  Montana/Idaho              

 

NEIC reported this earthquake of M 2.9 in Western Montana was felt with intensity II-III in the area(s) of Canyon Creek, Montana.

 

EASTERN U.S./CANADA

 

O: 19APR2018 13:15:02  41.4N  100.2W mb=3.3  EMSC   NEBRASKA                     

P: 23APR2018 116238    41.0N  100.0W 2.0-4.0 BAAAA  Southern Plains            

 

O: 19APR2018 10:32:43  36.0N   97.9W mb=2.8  EMSC   OKLAHOMA                     

P: 15APR2018 115966    36.0N   97.0W 2.0-3.9 AAAAA  Southern Plains            

 

NEIC reported this earthquake of M 2.8 in Oklahoma was felt with intensity II-III in the area(s) of South Hutchinson, Hutchinson, and Maize, Kansas.

 

O: 19APR2018 07:20:05  36.0N   97.9W mb=3.2  EMSC   OKLAHOMA                     

O: 19APR2018 06:36:34  36.4N   98.8W mb=3.8  EMSC   OKLAHOMA                      

P: 18APR2018 115966    37.0N   97.0W 2.0-3.9 AAAAA  Southern Plains            

 

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

An M 3.8 early in the day was reported with intensity II-III in Fairview, Alva, Woodward and Dover, Oklahoma. An earlier M 3.2 was felt in El Reno, Oklahoma.

 

O: 20APR2018 00:01:35  42.1N   83.1W Mw=3.6  EMSC   MICHIGAN                     

O: 20APR2018 00:01:35  42.1N   83.0W ML=4.1  NRCA  6 km ENE of Amherstburg

P: 22APR2018 116274    42.0N   80.0W 2.0-4.1 AABAA  Ohio/Lake Erie             

 

HAWAII

 

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