IRANIAN QUAKES AT THE FOREFRONT

 

EARTHQUAKE SUMMARY FOR JULY 22, 2018

 

The strongest seismicity in the world today continued in Iran. These occurred at three separate epicenters with moderate to large events and included an M 5.9, an M 5.5 and M 5.4.  An event of M 5.5 in southern Iran was reported felt with intensity V in Kerman, and II-III in Bahramabad and Giroft, Kerman, Iran and possibly in Irbil, Iraq. Strong earthquakes in this area can help promote higher magnitudes of quake in the San Andreas/Central California area because wavefronts from Iran are parallel to this fault zone when they arrive in the area of California. Much of this activity is at the third node (120 degrees) from Hawaii and may have been promoted by energy from that area.

 

The earthquake in western Iran of M 5.9 was reported with intensity VIII in Kermanshah and VI in Halubah and Javanrud and Aslamabad. Intensity V shook Kordestan with lesser shaking in Ilam, Diyala, Iran. It was also felt in Iraq with intensity II-IV at Kirkuk, Balad and other communities within about 300 km of the epicenter. Some damage was incurred in the epicentral zone in western Iran in the Kermanshah area. This is the largest earthquake in western Iran within about 200 km of this epicenter since an M 7.3 on November 12, 2107 and is probably the strongest aftershock to date of that event. The only other activity in the region since 1990 with M>=5.9 occurred on August 8, 2014 with M 6.0 and 6.2 about 250 km to the southwest of today's epicenter. Forecast 118186 had expected this event within about 150 km was likely around July 18.

 

O: 22JUL2018 16:48:48  34.5N   46.4E mb=4.4  EMSC   WESTERN IRAN

O: 22JUL2018 12:41:47  34.6N   46.2E ML=3.5  EMSC   WESTERN IRAN

O: 22JUL2018 10:46:09  34.6N   46.3E ML=3.9  EMSC   WESTERN IRAN

O: 22JUL2018 19:08:58  34.6N   46.4E ML=3.8  EMSC   WESTERN IRAN

O: 23JUL2018 01:13:44  34.7N   46.3E ML=3.5  EMSC   WESTERN IRAN

O: 23JUL2018 00:59:50  34.7N   46.4E mb=4.3  EMSC   WESTERN IRAN

O: 22JUL2018 10:07:26  34.5N   46.1E Mw=5.8  EMSC   WESTERN IRAN                 

O: 22JUL2018 10:07:26  34.6N   46.2E mb=5.9  ANSS   Sarpol-e Zahab Iran

P: 18JUL2018 118186    36.0N   46.0E 3.8-5.4 BBAAA  No. Iran                   

 

An earthquake of M 5.5 in Eastern Iran also occurred today. It was felt in the epicentral area but no damage was reported. The last earthquake of M>=5.5 within  about 200 km of this epicenter was an M      6.0 on December 12, 2017 in a continuing series which began on December 1, 2017. Prior to that events of M 5.5 occurred on January 22, 2016 and January 21, 2013. Forecast 118204 had expected today's event within about 100 km of the epicenter was likely around July 21.

 

O: 22JUL2018 20:39:16  30.3N   57.5E Mw=5.5  EMSC   EASTERN IRAN                 

P: 21JUL2018 118204    31.0N   57.0E 3.8-5.5 AAAAA  So. Iran                   

 

A smaller event of M 4.8 in southern Iran occurred within minutes of local solar midnight as was probably promoted by tidal stresses which maximize at this hour.

 

O: 22JUL2018 20:59:51  27.5N   54.9E mb=4.8  EMSC   SOUTHERN IRAN                

O: 22JUL2018 17:23:02  27.5N   55.0E ML=4.0  EMSC   SOUTHERN IRAN                

P: 19JUL2018 118163    28.0N   54.0E 3.5-5.4 BAAAA  So. Iran/Persian Gulf      

 

A moderate earthquake of M 5.4 was felt in Southern Iran today. It was associated with foreshocks and aftershocks of M 4.0 and 4.6. This activity may have been promoted by landfall of TS Son-Tinh in Vietnam. Faults across much of southern Asia often fail with landfall of storms in this area of southeastern Asia. It is likely that a general activation of the region could follow as noted in this summary:

 

"TS Son-tinh (TD 11W) continued today west of the northern Philippines with winds up to 45 kts.  It is expected to dissipate over Vietnam today. Some increased seismicity  on strike-slip faults further inland in Asia may be associated with landfall today." (July 21, 2018)

 

The last earthquake in Southern Iran within about 200 km of this epicenter with

M>=5.4 was an M 5.4 on January 22, 2016. The last of significantly larger magnitude occurred July 20, 2010. Forecast 118163 had expected today's event within about 100 km of the epicenter around July 19. This activity is at the fourth node (90 degrees) from the PNG quake of February and may have been promoted from that source.

 

O: 22JUL2018 05:59:20  27.5N   55.0E ML=4.0  EMSC   SOUTHERN IRAN                

O: 22JUL2018 05:04:48  27.6N   54.8E mb=4.6  EMSC   SOUTHERN IRAN                

O: 22JUL2018 05:07:02  27.7N   54.9E Mw=5.4  EMSC   SOUTHERN IRAN                

P: 19JUL2018 118163    28.0N   54.0E 3.5-5.4 AAAAA  So. Iran/Persian Gulf      

 

 

The strongest earthquake in the U.S. today was an M 5.5 associated with a strong eruption of Kilauea. NEIC reported it was felt with intensity IV in Laie, Hawaii and II-III in Volcano, Mountain View, Hilo,and Pepeekeo, Hawaii. Many lesser quakes were also felt lightly in the region of Volcano, Hawaii. Forecast 118135 had expected this activity around July 20.

 

O: 23JUL2018 06:53:38  19.4N  155.3W Mw=5.5  EMSC   ISLAND OF HAWAII, HAWAII     

O: 23JUL2018 06:53:38  19.4N  155.3W mw=5.5  ANSS   WSW of Volcano Hawaii

P: 20JUL2018 118135    19.9N  156.1W 3.0-4.6 BAAAA  Hawaii                     

 

 

 

 

MODERATE IRANIAN QUAKE MAY PRECEDE ADDITIONAL ACTIVITY

 

EARTHQUAKE SUMMARY FOR JULY 21, 2018

 

A moderate earthquake of M 5.4 was felt in Southern Iran today. It was associated with foreshocks and aftershocks of M 4.0 and 4.6. This activity may have been promoted by landfall of TS Son-Tinh in Vietnam. Faults across much of southern Asia often fail with landfall of storms in this area of southeastern Asia. It is likely that a general activation of the region could follow as noted in this summary:

 

"TS Son-tinh (TD 11W) continued today west of the northern Philippines with winds up to 45 kts.  It is expected to dissipate over Vietnam today. Some increased seismicity  on strike-slip faults further inland in Asia may be associated with landfall today." (July 21, 2018)

 

The last earthquake in Southern Iran within about 200 km of this epicenter with

M>=5.4 was an M 5.4 on January 22, 2016. The last of significantly larger magnitude occurred July 20, 2010. Forecast 118163 had expected today's event within about 100 km of the epicenter around July 19. This activity is at the fourth node (90 degrees) from the PNG quake of February and may have been promoted from that source.

 

O: 22JUL2018 05:59:20  27.5N   55.0E ML=4.0  EMSC   SOUTHERN IRAN                

O: 22JUL2018 05:04:48  27.6N   54.8E mb=4.6  EMSC   SOUTHERN IRAN                

O: 22JUL2018 05:07:02  27.7N   54.9E Mw=5.4  EMSC   SOUTHERN IRAN                

P: 19JUL2018 118163    28.0N   54.0E 3.5-5.4 AAAAA  So. Iran/Persian Gulf      

 

The strongest earthquake in the U.S. today was an M 5.4 associated with a strong eruption of Kilauea. NEIC reported it was felt with intensity IV in Volcano and Pahoa and II-III in Mountain View, Hilo, Papaikou and Pepeekeo, Hawaii..

Many lesser quakes were also felt lightly in the region of Volcano, Hawaii. Forecast 118135 had expected this activity around July 15. Overall with about 30 events of M>=3 today, the seismicity of Hawaii was well below what it has been for weeks.

 

O: 21JUL2018 19:43:28  19.4N  155.3W Mw=5.4  EMSC   ISLAND OF HAWAII, HAWAII     

P: 20JUL2018 118135    19.9N  156.1W 3.0-4.6 AAAAA  Hawaii                     

 

Moderate aftershocks including an M 5.4 also continued today in the Alaska Peninsula which has seen a series of moderate to large quakes in the past several days. These have not  been reported felt in the region but represent a significant enhancement in  regional seismicity as noted in previous issues of this summary:

 

 

"A moderately strong earthquake of M 5.6 hit western Alaska today. NEIC reported this earthquake was felt with intensity VI in King Cove and II-III in Chignik and possibly Soldotna, Alaska. This is the strongest earthquake within about 250 km of this epicenter since an M 5.6-5.7 on May 28, 2017 and prior to that an M 5.8 on October 27, 2016. The last event of M>=6 in the area was an M 6.1 on July 16, 2011. The only events of M>5.6 in Alaska in the past year was the M 7.9-8.0 on January 23, 2018 in the Gulf of Alaska.   Forecast 118251 had expected it within about 100 km of the epicenter around July 17. This epicenter is located at the 10th node (36 degrees) from the M 6.9 in Hawaii of May 4, the strongest earthquake in the world in the past two months. Alaska has been active in recent days and this event may help to alleviate some of the regional stress." (July 19, 2018)

 

O: 21JUL2018 08:15:17  54.4N  160.8W mb=3.7  EMSC   ALASKA PENINSULA             

O: 21JUL2018 07:58:39  54.5N  160.9W Mw=5.4  EMSC   ALASKA PENINSULA             

P: 17JUL2018 118251    54.8N  158.7W 3.5-4.9 BABAA  Alaska Peninsula           

 

An unusual earthquake of M 3.5 hit near the South Dakota-Nebraska border today near Valentine, Nebraska. NEIC reported it was felt with intensity IV in Valentine and Ainsworth, Nebraska and in Mission, South Dakota. Lesser shaking of intensity II-III was reported from Saint Francis and Winner, South Dakota and Cody, Nebraska. The last earthquake within about 100 km of this epicenter in South Dakota with M>=3.5 occurred on October 18, 2012 (M 3.6). Events of M 4.0 and 4.3 hit slightly further than 100 km from today's epicenter on May 25, 2003 and M 4.3 on November 3, 2002, the largest in the region since 1990. It was closely associated with the great Denali earthquake in Alaska of the same date (M 8.0). Unusual earthquakes in northwestern Missouri and in the Broken Bow area of central Nebraska along with a series of moderate to strong quakes in the Alaska Peninsula over the past week have  tended to reinforce this relation. This epicenter is at the seventh node (51 degrees) from Hawaii and the fifth node (72 degrees) from the Bolivia quake of April, 2018 and may have been promoted by energy from these sources.

 

 

O: 21JUL2018 07:11:30  43.0N  100.6W mb=3.5  EMSC   SOUTH DAKOTA                 

O: 21JUL2018 07:11:30  43.0N  100.6W mb=3.5  ANSS   NNW of Valentine Nebraska

 

A moderate earthquake of M 5.4 also occurred near the antipode of Nebraska and Missouri today. It was not felt in this remote area, but may have been related to the unusual seismicity in the central plains of the U.S. today. The last  earthquakes in the Southeast Indian Ridge within about 300 km of today's epicenter with M>=5.4 occurred as events of M 5.4-5.5 on August 6, 2017; May 11, 2014 and October 3, 2010. Forecast 118324 had expected this region would be active around July 18.

 

O: 21JUL2018 20:56:23  48.2S   99.6E mb=5.4  EMSC   SOUTHEAST INDIAN RIDGE       

P: 18JUL2018 118324    46.0S   96.0E 4.0-5.6 BCBAA  So. Indian Ocean           

 

A pair of moderate earthquakes also shook New Zealand today. The largest of these occurred near Nelson, South Island with M 4.8. The other was an M 4.6 under North Island.  GEONET reported this earthquake was felt with light intensity northeast of Okahune and in southwestern North Island and northern South Island. Light to moderate intensity was reported throughout much of southern and western North Island and northern South Island. More than 130 people reported feeling this earthquake with  90 reports of weak intensity; 38 of light intensity; 2 with moderate intensity; 0 with strong intensity; and 0 of severe intensity. The last earthquake within about 100 km of this epicenter with M>=4.6 was an M M 5.4 about 50 km east of this on July 10. Fouor earthquakes of M>=4.6 have hit this region during 2018. Forecast 118322 had expected today's activity within about 50 km was likely around July 18.

 

O: 21JUL2018 19:06:22  39.5S  176.1E mb=4.4  EMSC   NORTH ISLAND OF NEW ZEALAND  

O: 21JUL2018 19:06:23  39.4S  176.1E ML=4.6  GEONET Felt with light intensity

P: 18JUL2018 118322    40.0S  176.0E 3.0-4.6 BAAAA  North Island, N.Z.         

 

GEONET reported the earthquake of M 4.8-5.4 near Nelson was felt with moderate intensity in the northern South Island area. There were 8134 felt reports mostly from northern South Island, New Zealand. These included 3786 of weak shaking. Light intensity was felt by 3715 and moderate intensity by 595 person. Strong shaking was felt by 36 with one each reporting extreme and severe shaking. NEIC reported this earthquake of M 4.6 in Nelson, North Island, New Zealand was felt with intensity V in Porirua, IV in Wellington, and II-III in the area(s) of Nelson, New Zealand. An M 5.4 last hit the region on January 5, 2017. Forecast 118325 had expected today's event was likely within about 50 km of the epicenter around July 20.

 

O: 22JUL2018 03:14:43  41.1S  173.6E mb=4.8  EMSC   SOUTH ISLAND OF NEW ZEALAND  

O: 22JUL2018 03:14:44  41.2S  173.5E MB=5.4  GEONET Felt with moderate intensity

P: 20JUL2018 118325    41.0S  174.0E 3.0-5.1 AAAAA  So. Island, N.Z.           

 

The geomagnetic field saw quiet  conditions today. The AP level was 11 High latitude geomagnetic field saw disturbed conditions  with AP at 27. This is the strongest geomagnetic storm a high latitudes in nearly a month – since it reached 33 on June 26. This and coming geomagnetic storms could increase seismicity at high latitudes and near the geomagnetic equator. A strong associated earthquake is most likely between July 23 and 27.

 

MODERATELY STRONG QUAKES UNDER MARIANA IS; ARGENTINA CONTINUE GLOBAL ACTIVATION

 

EARTHQUAKE SUMMARY FOR JULY 20, 2018

 

Moderately strong earthquakes shook the northern Mariana Islands and a deep hypocenter under Argentina with M 5.6-5.7 each today. These continued the sudden global seismic activation which began two days ago. The earthquake in the northern Mariana Islands of M 5.7 was reported by NEIC to have been felt with intensity IV in Garapan, Saipan and in Tinian, Guam, Mariana Islands. The last earthquake within about 200 km of this epicenter with M>=5.7 occurred on September 14, 2017. Both are likely aftershocks of an M 7.7 which hit the area on July 29, 2016. Forecast 118145 had expected today's event was likely around July 16 within about 50 km of the epicenter. It is likely this was promoted by strong typhoon which passed directly over this epicenter earlier this month as noted in previous issues of this summary:

 

"Super-Typhoon Maria (TS 10W) continued today over Guam with winds up to 150 kts. It is expected to track to the northwest passing over Guam as a typhoon on  July 5-6. This storm could trigger a moderate to large quake in the region of Guam and the southern Mariana Islands which are currently seeing seismicity at moderately high levels." (July 7, 2018)

 

This quake in the Northern Marianas occurred at the sixth node (60 degrees) from the great Gulf of Alaska quake and was likely promoted from that source.

 

O: 20JUL2018 23:56:07  18.5N  145.9E Mw=5.7  EMSC   PAGAN REG., N. MARIANA ISLANDS

P: 16JUL2018 118145    18.0N  146.0E 4.0-5.4 BAAAA  No. Marianas               

 

The earthquake in Argentina of M 5.6 was not widely felt on the surface due to its deep focus. It is located near the antipode of TD 13 and TS Ampil current strong storms in the Philippines and Ryukyu Islands and may have been promoted by microseisms from that activity. This is the strongest earthquake within about

300 km of this epicenter since an M 5.6 on March 25, 2018 about 150 km to the north and prior to that an M 5.8 on November 13, 2015 about 250 km to the southwest of today's epicenter.  Forecast 118299 had expected today's event was likely in mid-July. This epicenter is located at 106 degrees from the great Gulf of Alaska quake and at 101 degrees from Hawaii and may have been promoted from those sources. 

 

O: 20JUL2018 10:24:56  28.1S   63.2W Mw=5.6  EMSC   SANTIAGO DEL ESTERO, ARGENTINA

P: 15JUL2018 118299    28.0S   67.0W 4.0-5.8 BACAA  Argentina                  

 

An earthquake of M 2.6 was felt widely in the region of northwestern Missouri and Kansas today. NEIC reported intensity II-III in Missouri at Saint Joseph, Amazonia, Agency, Faucett, De Kalb, Rayville, Trenton, Kirsville, Salem, and in Kansas at Wathena, Troy, Overland Park. It was also reported lightly felt in Saline, Michigan and Park River, North Dakota. This may be related to the M 6.0 in the Alaska yesterday. Earthquakes in Nebraska and South Dakota often are associated with strong earthquakes in Alaska - before or after those events. This relation has been frequently noted in this summary.  This is a very unusual earthquake and may point to additional seismicity in the area of Missouri and the Dakotas. A series of earthquakes in central Nebraska over the past two weeks near Broken Bow was probably precursory to the strong earthquakes in Alaska of the past two days as previously suggested in this summary. The last earthquake within about 100 km of today's Missouri epicenter was an M 3.1 on March 23, 2007 and prior to that an M 3.0 on May 13, 1999. Forecast 118209 had expected a light quake in the area in mid-July. This area should be watched as it may also indicate a spreading of the Oklahoma/Kansas/Nebraska activity into an extended area of the central Plain States of the U.S.

 

O: 20JUL2018 22:46:49  39.8N   94.9W mb=2.6  EMSC   MISSOURI                     

P: 15JUL2018 118209    38.0N   99.0W 2.0-4.3 BBCAA  Southern Plains            

 

The strongest earthquake in the U.S. or Canada today occurred off the coast of Oregon with M 3.9. NEIC reported this earthquake of M 3.9 off the coast of Oregon  may have been felt with intensity II-III in the area(s) of Florence, Oregon. This earthquake is the strongest within about 200 km of this epicenter off the coast of Oregon with  M>=3.9 was an M 4.6 two months ago on May 24, 2018. Forecast 118236 had expected this event was likely in mid-July within this region.

 

O: 20JUL2018 11:04:04  43.9N  128.1W mb=3.9  EMSC   OFF COAST OF OREGON          

P: 16JUL2018 118236    44.3N  129.4W 3.0-4.6 BAAAA  Off Coast of Oregon        

P: 20JUL2018 118236    43.1N  126.5W 3.0-4.7 AABAA  Off Coast of Oregon        

 

MODERATELY STRONG QUAKE IN ALASKA

 

EARTHQUAKE SUMMARY FOR JULY 18, 2018

 

A moderately strong earthquake of M 5.6 hit western Alaska today. NEIC reported this earthquake was felt with intensity VI in King Cove and II-III in Chignik and possibly Soldotna, Alaska. This is the strongest earthquake within about 250 km of this epicenter since an M 5.6-5.7 on May 28, 2017 and prior to that an M 5.8 on October 27, 2016. The last event of M>=6 in the area was an M 6.1 on July 16, 2011. The only events of M>5.6 in Alaska in the past year was the M 7.9-8.0 on January 23, 2018 in the Gulf of Alaska.  Forecast 118251 had expected it within about 100 km of the epicenter around July 17. This epicenter is located at the 10th node (36 degrees) from the M 6.9 in Hawaii of May 4, the strongest earthquake in the world in the past two months. Alaska has been active in recent days and this event may help to alleviate some of the regional stress.

 

O: 18JUL2018 19:06:03  54.4N  160.7W Mw=5.6  EMSC   ALASKA PENINSULA             

O: 18JUL2018 19:06:03  54.4N  160.7W mw=5.6  ANSS   Chernabura Island Alaska

O: 19JUL2018 02:28:16  54.5N  160.8W ML=3.6  EMSC   ALASKA PENINSULA             

P: 17JUL2018 118251    54.8N  158.7W 3.5-4.9 AAAAA  Alaska Peninsula           

 

The second strongest earthquake in the U.S. today was an M 5.3 associated with a strong eruption of Kilauea. NEIC reported it was felt with intensity IV in Volcano, and II in Mountain View, Hilo, Kealakekua and Kaunakakai, Hawaii.

Many lesser quakes were also felt lightly in the region of Volcano, Hawaii. Forecast 118135 had expected this activity around July 15. Overall with about 30 events of M>=3 today, the seismicity of Hawaii was well below what it has been for weeks.

 

O: 18JUL2018 11:28:03  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 15JUL2018 118135    19.3N  155.2W 3.0-4.6 BAAAA  Hawaii                     

 

An unusual earthquake of M 3.6 occurred in South Africa today. The last earthquake of M>=3.6 within about 200 km of this epicenter occurred on December 2, 2013 about 200 km northwest of today's epicenter and prior to that an M 4.6 on July 7, 2013. Forecast 118303 had expected today's event was likely in this area around July 16. This event is near the antipode of Hawaii and may have been promoted from that eruption.

 

O: 19JUL2018 01:34:40  26.0S   30.1E mb=3.6  EMSC   SOUTH AFRICA                 

P: 16JUL2018 118303    26.0S   28.0E 3.0-4.4 BABAA  Rep. South Africa          

 

At least two moderate earthquakes today may have been promoted by strong weather systems. The largest of these was an M 4.8 in Guam, an area which has been active in the past several days beginning with the passage of Super-typhoon Maria earlier this month as noted in previous issues of this summary:

 

"Super-Typhoon Maria (TS 10W) continued today over Guam with winds up to 150 kts. It is expected to track to the northwest passing over Guam as a typhoon on  July 5-6. This storm could trigger a moderate to large quake in the region of Guam and the southern Mariana Islands which are currently seeing seismicity at moderately high levels." (July 7-9, 2018)

 

NEIC reported this earthquake of M 4.8 in Guam was felt with intensity IV in Dededo, Guam and II-III in the area(s) of Guam at Yigo, Mangilao, Tamuning, Barrigada, Hagatna, Yona, Talofofo, Merizo and Santa Rita.

 

O: 18JUL2018 12:27:10  13.4N  144.4E mb=4.8  EMSC   GUAM REGION                  

P: 15JUL2018 118149    13.0N  144.0E 4.0-5.6 BAAAA  So. Marianas/Guam          

 

The quake in the northern Philippines occurred shortly after TS Son-Tinh passed over the epicenter as noted in previous issues of this summary:

 

"TS Son-tinh (TD 11W) continued today west of the northern Philippines with winds up to 45 kts.  This system is expected to move to the west over the next several days perhaps elevating seismicity in the Northern Philippines and/or Taiwan." (July 17, 2018)

 

O: 18JUL2018 10:35:20  20.2N  121.3E mb=4.5  EMSC   BATAN ISL REGION, PHILIPPINES

P: 19JUL2018 118164    20.0N  121.0E 4.0-5.6 AAAAA  Taiwan                      

 

SOUTHWEST PACIFIC CONTINUES ACTIVE

 

EARTHQUAKE SUMMARY FOR JULY 17, 2018

 

The strongest seismicity in the world today was an M 5.9 in the Santa Cruz Islands north of Vanuatu. It was not reported in this remote oceanic region. The last earthquake of M>=5.9 within about 150 km of this epicenter occurred exactly three years ago on July 18, 2015 with M 7.0. Forecast 118297 had expected this event within about 50 km of the epicenter was likely around July 18.

 

O: 17JUL2018 07:02:54  11.6S  166.4E Mw=5.9  EMSC   SANTA CRUZ ISLANDS           

P: 18JUL2018 118297    12.0S  166.0E 4.0-5.8 AAAAA  Vanuatu Islands            

 

An unusual earthquake of M 3.5 was recorded today in Northern Alaska. It was not reported felt in this remote area. The last earthquake with M>=3.5 within about 250 km of this epicenter occurred on  May 16, 2018 about 200 km southeast of today's epicenter with M 3.8. Prior to that an M 3.7 on August 29, 2017 and an M 4.5 on March 5, 2016 (and aftershocks of M 4.0 and 4.3) were the only such quakes in the past 2.5 years.

 

O: 18JUL2018 04:45:22  67.6N  159.7W Ml=3.5  EMSC   NORTHERN ALASKA              

 

An earthquake of M 4.3 was widely felt in the Dominican Republic today. NEIC reported this earthquake of M 4.3 in the Dominican Republic was felt with intensity IV in San Francisco de Macoris, Duarte, Dominican Republic and II-III in the area(s) of Cabrera, Rio San Juan and Santiago, Dominican Republic.  Other earthquakes of M>=4.3 in the Dominican Republic have occurred in 2018 on January 28 (M 4.4) and June 3 (M 4.7). Forecast 118151 had expected today's event within about 100 km of this epicenter was likely around July 19.

 

O: 18JUL2018 05:22:28  19.6N   69.9W mb=4.3  EMSC   DOMINICAN REPUBLIC           

P: 19JUL2018 118151    20.0N   71.0W 3.0-4.4 AAAAA  Bahamas/No. Caribbean      

 

An unusually large earthquake of M 5.0 also occurred today in Michoacan, Mexico. NEIC reported this earthquake of M 5.0 in Michoacan, Mexico was felt with intensity II-III in the area(s) of Colima, Suchit5lan, Manzanillo, Colima; in Jalisco at Zapotiltic, Guzman, Guadalajara, Puerto Vallarta and in Tinguindin, Michoacan and Mexico City, Mexico.  The last earthquake in Michoacan, Mexico with M>=5 occurred on February 20, 2013. An M 6.0 hit west of this in Colima on June 20, 2018. The only other such event in the past year in the region was an M 5.8 on February 9, 2018. Forecast 118142 had expected today's event was likely within about 100 km of this epicenter around July 17. This activity is at the seventh node (51 degrees) from the great Gulf of Alaska quake of January 23 and was probably promoted from that source.

 

O: 17JUL2018 09:39:38  18.2N  103.5W ML=4.1  EMSC   OFFSHORE MICHOACAN, MEXICO   

O: 17JUL2018 08:54:40  18.4N  103.3W Mw=5.0  EMSC   MICHOACAN, MEXICO             

P: 17JUL2018 118142    19.0N  104.0W 3.5-5.2 AAAAA  Michoacan, Mexico          

 

MODERATELY STRONG BALLENY ISLANDS QUAKE

 

EARTHQUAKE SUMMARY FOR JULY 16, 2018

 

An earthquake of M 5.8 occurred today in the Balleny Islands region south  of Australia and New Zealand. It was not reported felt in this remote area. The last earthquake f equal or larger magnitude in the area was an M 6.2 on October 8, 2017. Earthquakes of M 5.1 and 5.2 also occurred in the area on January 23 and April 6, 2018. The tectonics of the area do not easily produce tsunami waves. This epicenter is located at the fourth node (90.0 degrees) from Hawaii and was probably promoted from that source.

 

O: 16JUL2018 15:18:37  61.4S  155.2E Mw=5.8  EMSC   BALLENY ISLANDS REGION       

 

 

The strongest earthquake in the U.S. today was an M 5.3 associated with a strong eruption of Kilauea. NEIC reported it was felt with intensity I in Kapaau and IV in Volcano, and III in Pepeekeo and Kaunakakai,  Hawaii. Many lesser quakes were also felt lightly in the region of Volcano, Hawaii. Forecast 118135 had expected this activity around July 15.

 

O: 16JUL2018 21:42:35  19.4N  155.3W mw=5.3  ANSS   SW of Volcano Hawaii

O: 16JUL2018 21:42:09  19.4N  155.3W ML=4.7  EMSC   ISLAND OF HAWAII, HAWAII     

P: 15JUL2018 118135    19.3N  155.2W 3.0-4.6 AAAAA  Hawaii                     

 

STRONG QUAKE IN GULF OF ADEN CONTINUES REGIONAL SWARM

 

EARTHQUAKE SUMMARY FOR JULY 15, 2018

 

The strongest earthquake in the world today was an M 5.9-6.0 in the Gulf of  Aden. NEIC reported it was felt with intensity V in Yemen at Hadramaut and Aden, Yemen. This summary had noted this activity in the previous issue as:

 

"The strongest seismicity in the world today occurred in the Gulf of Aden off the coast of Yemen. This included an M 5.4 event which was felt with intensity IV in Hadramaut, Yemen. Recent activity in the area suggests continuing moderate to large quakes are likely in the next several days. The last earthquake in the Gulf of Aden within about 300 km of this epicenter with M>=5.4 occurred on August 17, 2015 with M 5.6. The last of M>=6 was an M 6.6 on December 30, 2006 south of today's epicenter. Forecast 118134 had expected today's activity to the east in the Gulf of Aden around July 16." (July 15, 2018)

 

This activity is located at 108 degrees from the great M 8.0 Gulf of Alaska

quake of January 23, 2018 and may have been promoted from that source.

 

O: 15JUL2018 12:59:12  13.8N   51.7E mb=4.4  EMSC   GULF OF ADEN                 

O: 15JUL2018 13:09:16  13.9N   51.7E Mw=5.9  EMSC   GULF OF ADEN                 

O: 15JUL2018 13:09:16  13.8N   51.7E mw=6.0  ANSS   SSE of Sayhut Yemen

P: 16JUL2018 118134    14.0N   54.0E 3.5-5.3 AACAA  Gulf of Aden               

 

The current earthquakes in the region of Galapagos today continued with an M 4.7 and smaller events. This, like the activity in Hawaii is probably related to volcanism at this hot spot, and joins other such areas, like Iceland, and  the southwest Indian Ridge where this type of activity is occurring. The strongest

in the current swarm was an M 5.5 on June 26, 2018. Forecast 117912 had expected this regional activity in mid-July. This activity is at the fifth node from the Gulf of Alaska, a distance at which some seismic promotion is likely.

 

O: 16JUL2018 03:31:02   0.7S   91.2W ML=4.1  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 15JUL2018 13:35:03   0.8S   91.1W ML=4.1  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 16JUL2018 01:51:22   0.8S   91.1W ML=4.7  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 15JUL2018 11:24:29   0.8S   91.2W ML=3.4  EMSC   GALAPAGOS ISLANDS, ECUADOR   

P: 10JUL2018 117912     2.0N   85.0W 4.0-5.6 BCCAA  So. of Panama              

 

An M 3.0 in the region of San Francisco, California today was widely felt. NEIC reported it was felt with intensity II-III in San Leandro, Hayward, San Lorenzo, Castro Valley, Oakland, and in general within about 100 km of the epicenter. This is the largest event near San Francisco since an M 3.2 on June 22, 2018 and prior to that an M 3.0 on May 30, 2018. Ten such events have hit the area within about 50 km of this epicenter during 2018. The largest was an M 4.4 on January 4, 2018. Forecast 118173 had expected this activity was likely within about 15 km of the epicenter around July 16.

 

O: 15JUL2018 18:52:57  37.7N  122.1W ML=3.0  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 16JUL2018 118173    37.7N  121.9W 2.5-4.6 AAAAA  Central California         

 

The strongest earthquake in the U.S. today was an M 5.2 associated with a strong eruption of Kilauea. NEIC reported it was felt with intensity V in Kapaau and II-III in Volcano, Hilo, Paauilo and Kealakekua, Hawaii. Many lesser quakes were also felt lightly in the region of Volcano, Hawaii. Forecast 118135 had expected this activity around July 15.

 

O: 15JUL2018 13:26:05  19.4N  155.3W mw=5.2  ANSS   WSW of Volcano Hawaii        

O: 15JUL2018 13:26:03  19.4N  155.3W Mw=5.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 15JUL2018 118135    19.3N  155.2W 3.0-4.6 AAAAA  Hawaii                     

 

The strongest earthquake in the U.S. or Canada outside Hawaii was an M 3.7 in the Fox Islands, Aleutians, continuing activity in that region. It was not felt in this remote area. The last event within about 150 km of this epicenter in the

Fox Islands with M>=3.7 occurred on July 13 with M 3.9. Six such events have occurred in this area in the past month, the largest of which was an M 4.3 on July 11. Forecast 118254 had expected this activity was likely in mid-July.

 

O: 15JUL2018 08:16:09  52.7N  168.2W ML=3.7  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 19JUL2018 118254    52.1N  171.3W 3.5-5.1 BABAA  Andreanoff Isls, Aleutians 

 

After a short quiet interval, the swarm of light to moderate quakes near Broken Bow, Nebraska continued today with an M 2.8.  NEIC reported this earthquake of M 2.8 in Nebraska was felt with intensity II-III in the area(s) of Arnold, Stapleton and Oshkosh, Nebraska.  The activity in Nebraska is at the seventh node from Hawaii (51-52 degrees) and is likely to have been promoted from that area.

 

O: 16JUL2018 01:00:07  41.3N  100.1W mb=2.8  EMSC   NEBRASKA                     

 

MODERATELY STRONG QUAKE IN GULF OF ADEN

 

EARTHQUAKE SUMMARY FOR JULY 14, 2018

 

The strongest seismicity in the world today occurred in the Gulf of Aden off

the coast of Yemen. This included an M 5.4 event which was felt with intensity IV in Hadramaut, Yemen. Recent activity in the area suggests continuing moderate to large quakes are likely in the next several days. The last earthquake in the Gulf of Aden within about 300 km of this epicenter with M>=5.4 occurred on August 17, 2015 with M 5.6. The last of M>=6 was an M 6.6 on December 30, 2006 south of today's epicenter. Forecast 118134 had expected today's activity to the east in the Gulf of Aden around July 16.

 

O: 15JUL2018 01:57:19  14.0N   51.7E Mw=6.0  EMSC   GULF OF ADEN                 

O: 15JUL2018 01:57:19  14.1N   51.7E mb=5.4  ANSS   SSE of Sayhut Yemen

P: 16JUL2018 118134    14.0N   54.0E 3.5-5.3 AACAA  Gulf of Aden               

 

The strongest earthquake in the U.S. or Canada today was an M 3.9 in northern Alaska. NEIC reported this earthquake of M 3.9 in Central Alaska was felt with intensity II-III in the area(s) of Fairbanks and North Pole, Alaska.  This is the strongest earthquake in Northern Alaska within about 150 km of this epicenter since an M 4.8 on October 23, 2014. An M 4.4 hit about 200 km northeast of this on May 11, 2018.  Forecast 118274 had expected activity in the area was likely around July 18.

 

O: 14JUL2018 16:12:04  65.8N  147.8W ML=3.9  EMSC   NORTHERN ALASKA              

P: 18JUL2018 118274    63.1N  144.7W 3.2-5.0 BCBAA  Central Alaska             

 

STRONG QUAKE IN SOUTHERN VANUATU MAY BRING RENEWED SEISMICITY

 

EARTHQUAKE SUMMARY FOR JULY 13, 2018

 

For the most part, global seismicity was up today. Moderate aftershocks occurred in most areas which have recently been active including the Gulf of Alaska (M 4.7); the Galapagos (M 4.6); the South Sandwich Islands (M 4.9) and Hawaii (M 4.4, 5.3).  The strongest earthquake in the world today was an M 6.4 in Southern Vanuatu. NEIC reported it was felt with intensity III in Vanuatu at Isangel and Vila. Previous issues of this report had noted the activity in Vanuatu as:

 

"The strongest earthquake of the day, however was an M 5.5 in southern Vanuatu, a region which has been active in the past several days including an M 5.5 in New Caledonia yesterday. Forecast 118073 expected today's event in Vanuatu was likely within about 100 km around July 6.  NEIC reported this earthquake of M 5.5 in Vanuatu was felt with intensity II-III in the area(s) of Vila, Shefa, Vanuatu.  It is located at the seventh node (51 degrees) from Hawaii and was probably promoted from that source." (July 9, 2018)

 

This is the strongest earthquake in the world in more than two months – since the M 6.9 in Hawaii associated with the volcanism there on May 4, 2018. While the eruption in Hawaii continues to hold off larger strong earthquakes this will not continue indefinitely and today's event in Vanuatu may represent a turning point in the current quiet period. It is also the largest quake in southern Vanuatu since an M 6.4 on September 20, 2017. Forecast 118297 had  expected today's event within about 100 km in mid-July. It is located at the seventh node (51 degrees) from Hawaii and was probably promoted from that source.

 

O: 13JUL2018 09:46:48  18.9S  169.1E Mw=6.4  EMSC   VANUATU                       

P: 16JUL2018 118297    19.0S  168.0E 4.0-5.6 BAAAA  Vanuatu Islands            

 

An earthquake of M 5.3 was associated with a strong eruption of Kilauea Volcano, Hawaii today. NEIC reported it was felt with intensity IV in Hilo, Kurtistown, Volcano, and II-III in Pepeeleo, Honomu and Papaaloa, Hawaii.

Many other smaller events were also lightly felt in the Volcano area today as well. Forecast 118135 expected this activity in mid-July.

 

O: 14JUL2018 05:08:03  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 15JUL2018 118135    19.3N  155.2W 3.0-4.6 AAAAA  Hawaii                     

 

Alaska saw a pair of moderate earthquakes today. The strongest was an M 4.7 in  the aftershock area of the M 8.0 there in late January, 2018. Today's event was not reported in this remote area but was felt outside the region. It is the strongest aftershock in this zone since an M  4.8 on June 17 and prior to that an M 5.5 on May 8, 2018. Forecast 118252 had expected this activity within about 50 km of this epicenter was likely in mid-July.

 

NEIC reported this earthquake of M 4.7 in the Gulf or Alaska was felt with intensity V in the area(s) of Homer, Alaska.

 

 

O: 13JUL2018 22:30:47  55.3N  149.0W ML=3.7  EMSC   GULF OF ALASKA

O: 13JUL2018 22:07:31  55.4N  149.1W ML=3.1  EMSC   GULF OF ALASKA

O: 13JUL2018 10:08:14  56.5N  149.2W ML=3.3  EMSC   GULF OF ALASKA

O: 13JUL2018 21:32:56  56.2N  149.4W mb=4.7  EMSC   GULF OF ALASKA               

P: 17JUL2018 118252    55.0N  148.7W 3.5-4.9 BBAAA  Gulf of Alaska              

 

An M 4.6 in the Kenai Peninsula of Alaska, however was the most widely felt quake in the U.S. today. The area of southern Alaska has been active in the past week and this appears to continue that trend.  NEIC reported this earthquake of M 4.6 in Southern Alaska was felt with intensity IV in the area of Homer, Alaska and in the area(s) of Anchor Point and Soldotna, Alaska. This is the largest quake within about 200 km of this epicenter in the Kenai Peninsula since an M 5.1 on March 9, 2018 and prior to that an M 5.1 on November 5, 2017. The last of larger magnitude within about 100 km was an M 6.2 on May 7m 2017. Forecast 118271 had expected this event within about 100 km of the epicenter in mid-July.

 

 

O: 13JUL2018 18:54:34  59.3N  151.2W Mw=4.6  EMSC   KENAI PENINSULA, ALASKA      

P: 16JUL2018 118271    60.1N  150.6W 3.2-5.5 BAAAA  Central Alaska             

 

An unusual swarm in southern Idaho today began with several small foreshocks which were followed by larger events including an M 3.5 an hour later. NEIC reported this earthquake of M 3.2 in Idaho was felt with intensity II-III in the area(s) of Stanley, Idaho and possibly in Salt Lake City, Utah. This may have been encouraged by strong tidal stresses as it occurred with the new moon near local solar noon when such stresses are maximized. The last earthquake within about 100 km of this epicenter occurred on May 3, 2014 with M 3.8. Most of

the regional seismicity at these magnitude levels is aftershocks in the Challis/Borah Peak area of Idaho about 100 km to the northeast of today's epicenter.   Forecast 118227 had expected this activity was likely to the east around July 15. This activity is located at 103 degrees from the M 7.6 in Papua New Guinea of late February and was probably promoted from that source.

 

O: 13JUL2018 18:18:37  44.3N  114.9W ML=2.1  EMSC   SOUTHERN IDAHO

O: 13JUL2018 18:57:46  44.3N  115.0W ML=2.0  EMSC   SOUTHERN IDAHO

O: 13JUL2018 17:10:06  44.3N  115.0W ML=2.1  EMSC   SOUTHERN IDAHO

O: 13JUL2018 18:15:25  44.3N  115.0W ML=2.4  EMSC   SOUTHERN IDAHO

O: 13JUL2018 18:17:01  44.3N  115.0W ML=2.4  EMSC   SOUTHERN IDAHO

O: 13JUL2018 17:12:03  44.3N  115.0W ML=2.5  EMSC   SOUTHERN IDAHO

O: 13JUL2018 18:32:18  44.3N  115.0W ML=2.5  EMSC   SOUTHERN IDAHO

O: 13JUL2018 17:24:55  44.3N  115.0W ML=2.7  EMSC   SOUTHERN IDAHO

O: 13JUL2018 18:07:45  44.3N  115.0W ML=2.7  EMSC   SOUTHERN IDAHO

O: 13JUL2018 18:04:55  44.3N  115.0W ML=3.5  EMSC   SOUTHERN IDAHO               

P: 15JUL2018 118227    44.5N  114.2W 2.0-4.0 AAAAA  Montana/Idaho              

 

 

 

SOUTHWEST PACIFIC ACTIVE

 

EARTHQUAKE SUMMARY FOR JULY 12, 2018

 

The strongest earthquakes of the day today occurred in the Fiji Islands (M 5.5) and in Tonga (M 5.2). This area from Vanuatu east to Tonga and Fiji has been active in the past week. It is remote and these earthquakes were not reported felt in this area. Forecast 118079 had expected this activity in early July.

 

O: 13JUL2018 03:13:33  21.6S  174.4W mb=5.2  EMSC   TONGA                        

P:  6JUL2018 118079    20.0S  175.0W 4.0-5.6 CBAAA  Tonga Islands              

 

O: 12JUL2018 06:51:20  23.4S  179.9W Mw=5.5  EMSC   SOUTH OF FIJI ISLANDS        

P:  7JUL2018 118080    25.0S  179.0W 4.0-5.6 BBAAA  Tonga Islands              

P:  8JUL2018 118079    24.0S  176.0W 4.0-5.9 BACAA  Tonga Islands              

 

An earthquake of M 5.3 was associated with a strong eruption of Kilauea Volcano, Hawaii today. NEIC reported it was felt with intensity II-III in Hilo, Naalehu, Volcano, Pepeeleo and Kaunakakai, Hawaii. Many other smaller events were also lightly felt in the Volcano area today as well. Forecast 117953 expected this activity around July 9.

 

O: 13JUL2018 00:42:27  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P:  9JUL2018 117953    19.4N  155.3W 4.0-5.7 BAAAA  Hawaii area                

 

A light earthquake of M 2.9 in the Los Angeles, California area occurred today.

It was felt in the area of Buena Park, La Palma, Cypress, Stanton, Anaheim, Fullerton, La Mirada and Cerritos among other communities. While this may be of no regional significance in regional seismicity, the depth of 19 km is concerning as most moderate or large earthquakes begin at this depth near the brittle-viscous transition zone in the area. The location is also of concern as it may be part of a pattern in recent days matching what may be expected prior to a large regional event. The area has such events about 22-24 years apart. The last was the Northridge quake in January, 1994 and prior to that the San Fernando quake of February 1971 so another such is due. While these generally occur in winter, some such as the Landers quake of June, 1992 have occurred in summer months. The last earthquake of M>=2.9 in Central Los Angeles within about 50 km of this epicenter occurred as an M 3.1 on November 10, 2017. An M 3.6 occurred on July 10, 2018 about 50 km to the east of today's epicenter and may have helped promote today's earthquake. Forecast 117991 had expected this event within about 25 km around July 6.

 

O: 12JUL2018 20:24:51  33.9N  118.0W ML=2.9  EMSC   GREATER LOS ANGELES AREA, CALI

P:  6JUL2018 117991    33.9N  118.3W 2.5-4.7 CAAAA  So. California             

 

The strongest earthquakes in the U.S. or Canada today continued in Alaska with M 4.0. These occurred in the Rat Islands and off the coast of Southeastern Alaska. This later event was the largest since an M 4.0 on September 21, 2017 and a similar event on August 18, 2017. The last of larger magnitude was an M 5.8 on January 16, 2017. Forecast 118051 had expected this event was likely around July 10.

 

O: 12JUL2018 13:14:34  52.0N  178.5E mb=4.0  EMSC   RAT ISLANDS, ALEUTIAN ISLANDS

P:  7JUL2018 118048    51.0N  178.0E 4.0-5.8 BAAAA  Rat Islands                

 

O: 12JUL2018 18:07:18  57.4N  138.0W ML=3.8  EMSC   OFF COAST OF SOUTHEASTERN ALAS

O: 12JUL2018 18:07:17  57.5N  137.9W ML=4.0  NRCA  164 km W   of Sitka

P: 10JUL2018 118051    57.9N  139.0W 3.0-4.4 AAAAA  Southeast Alaska           

MODERATE QUAKES SHAKE VOLCANO ISLANDS - RELATED TO TYPHOON MARIA

 

EARTHQUAKE SUMMARY FOR JULY 11, 2018

 

Two moderate earthquakes of M 5.0 and 5.1 occurred in the Volcano Islands near Iwo Jima, Japan today. They were not reported felt but illustrate the relation between strong weather systems and subsequent seismicity. In this summary in previous issues the Volcano Islands had been emphasized as a possible site of enhanced seismicity with the passage of Super-Typhoon Maria as:

 

"Super-Typhoon Maria (TS 10W) continued today over Guam with winds up to 150 kts. It is expected to track to the northwest passing over Guam as a typhoon on

July 5-6. This storm could trigger a moderate to large quake in the region of Guam and the southern Mariana Islands which are currently seeing seismicity at moderately high levels." (July 7-9, 2018)

 

The last earthquake in the Volcano Islands with M>=5.1 occurred on April 15, 2018 also with M 5.1. The last of larger magnitude was an M 5.7 on September 11, 2017. Forecast 117963 had expected today's activity was likely within about 100 km of these epicenters in the Volcano Islands around July 9.

 

O: 12JUL2018 00:38:01  23.5N  143.8E mb=5.1  EMSC   VOLCANO ISLANDS, JAPAN REGION

O: 12JUL2018 03:09:24  23.6N  143.8E mb=5.0  EMSC   VOLCANO ISLANDS, JAPAN REGION

P:  9JUL2018 117963    24.0N  143.0E 4.0-5.6 AAAAA  Volcano Islands            

 

An earthquake of M 5.3 was associated with a strong eruption of Kilauea Volcano, Hawaii today. NEIC reported it was felt with intensity IV in Volcano and II-III in Hilo, Naalehu and Kailua Kona, Hawaii. Many other smaller events were also lightly felt in the Volcano area today as well. Forecast 117953 expected this activity around July 9.

 

O: 11JUL2018 15:45:53  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P:  9JUL2018 117953    19.4N  155.3W 4.0-5.7 AAAAA  Hawaii area                

 

The strongest earthquake in the U.S. or Canada outside Hawaii today was an M 4.3 in the Fox Islands, Aleutians, Alaska continuing an upswing in seismicity in the Aleutians over the past week. It was not felt in this remote epicentral area. The last earthquake in the western Fox Islands within about 150 km of this epicenter with M>=4.3 was an M 4.6 on May 18, 2018. Forecast 118041 had expected today's epicenter to be active around July 8.

 

O: 11JUL2018 23:57:01  53.2N  169.2W mb=4.3  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P:  8JUL2018 118041    52.5N  169.2W 3.5-4.9 BAAAA  Fox Islands, Aleutians     

 

STRONG SERIES IN SOUTHWEST INDIAN RIDGE CONTINUES

 

EARTHQUAKE SUMMARY FOR JULY 10, 2018

 

A strong series of earthquakes southeast of Madagascar in the Southwest Indian Ridge continued and was enhanced today. The largest of these events today were M 5.5-6.0. None of these were reported felt in this remote area but as this summary noted in the previous issue may become associated with the antipodal region of Southern and Baja California as:

 

 

"A series of moderate earthquakes in the South Indian Ridge of M 4.7-5.1 today  may precede seismic activation of Southern California. These two areas are antipodal to each other and often become active together. The exact antipode of these epicenter in the Southwest Indian Ridge is 32N 122W off the coast of Baja

California but antipodal effects are not limited to the exact antipode but can affect nearby areas such as Baja and Southern California especially if this series is enhanced with larger magnitudes in coming days. The last earthquake within about 200 km of the Indian Ridge events with M>=5.1 occurred on July 12, 2016 with M 5.4. Forecast 118086 had expected this activity within about 100 km was likely around July 7. This activity is located at 103 degrees from the M 6.8 in Bolivia of April 2 and may have been promoted from that source." (July 10, 2018)

 

The activity in Hawaii is at 99 degrees from Bolivia as well. Both regions are volcanic and the new activity in the Indian Ridge may reflect volcanism in the area.

 

The last earthquake within about 100 km of this epicenter in the Indian Ridge with M>=5.6 was an event of M 5.9 on January 12, 2016 and prior to that on M 5.8 on August 24, 2013 and M 5.6 on March 12, 2006. These are the only such events in the area since 1990.  Forecast 118086 expected this earthquake was likely around July 7. This activity is at 147 degrees from Hawaii, a distance at which strong triggering is often seen.

 

O: 10JUL2018 08:15:25  31.3S   58.2E mb=5.0  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 07:26:58  31.6S   58.0E mb=5.1  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 16:05:09  31.6S   58.2E Mw=5.5  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 12:04:07  31.6S   58.2E mb=4.9  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 14:35:26  31.6S   58.2E mb=4.9  EMSC   SOUTHWEST INDIAN RIDGE

O: 11JUL2018 03:07:15  31.6S   58.2E mb=5.1  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 11:30:07  31.6S   58.3E mb=4.9  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 17:45:01  31.7S   58.1E mb=4.7  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 13:07:12  31.7S   58.2E mb=4.8  EMSC   SOUTHWEST INDIAN RIDGE

O: 11JUL2018 02:22:21  31.7S   58.2E mb=4.9  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 08:44:14  31.7S   58.2E mb=5.2  EMSC   SOUTHWEST INDIAN RIDGE

O: 11JUL2018 00:33:40  31.7S   58.2E mb=5.2  EMSC   SOUTHWEST INDIAN RIDGE

O: 11JUL2018 05:00:42  31.7S   58.2E mb=5.3  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 10:26:21  31.7S   58.3E Mw=5.6  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 18:41:37  31.7S   58.3E mb=4.9  EMSC   SOUTHWEST INDIAN RIDGE

O: 10JUL2018 23:28:00  31.7S   58.3E mb=5.2  EMSC   SOUTHWEST INDIAN RIDGE       

P:  7JUL2018 118086    32.0S   59.0E 4.0-5.8 BAAAA  So. Indian Ocean           

 

 

A light earthquake of M 3.6 in the eastern Los Angeles, California area today was followed by an M 2.5 aftershock. These events were both widely felt in  the epicentral area but no major damage was reported.  NEIC reported this earthquake of M 2.5 in the Los Angeles, California area was felt with intensity IV in Ontario, California and II-III in the area(s) of Chino, Rancho Cucamonga, Norco, Corona and Fontana, California.  The M 3.6 is the strongest event within about 50 km of this epicenter since an M 4.0 on January 25, 2018 and prior to that an M 3.6 on March 14, 2017. The only other such  event in the past three years (since 2015) in the area was  an M 3.7 on October 8, 2016. Forecast 117992 had expected this event within this area was likely around July 9. This earthquake is located at 102 degrees from the M 7.6 in Papua New Guinea of February 25 and may have been promoted from that source.

 

O: 10JUL2018 12:33:03  34.0N  117.6W ML=2.5  EMSC   GREATER LOS ANGELES AREA, CALI

O: 10JUL2018 11:08:37  34.0N  117.6W ML=3.6  EMSC   GREATER LOS ANGELES AREA, CALI

P:  9JUL2018 117992    34.3N  117.5W 2.5-4.5 AAAAA  So. California              

 

The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Near Islands, Aleutians. This is near the most west point in the U.S. but was not reported felt in  this area. The last earthquake in the Near Islands with M>=4.6 occurred on May 9, 2018 (M 4.9) and prior to that on August 8, 2017 (M 5.1). Forecast 118043 had expected today's event within about 100 km of the epicenter was likely around July 10.

 

O: 10JUL2018 15:54:24  53.4N  172.8E mb=4.6  EMSC   NEAR ISLANDS, ALEUTIAN ISLANDS

P: 10JUL2018 118043    53.0N  170.0E 4.0-5.6 AABAA  Near Islands               

 

 

EARTHQUAKES IN SOUTH INDIAN RIDGE MAY PRECEDE INCREASE IN SO. CALIFORNIA

 

EARTHQUAKE SUMMARY FOR JULY 9, 2018

 

A series of moderate earthquakes in the South Indian Ridge of M 4.7-5.1 today

may precede seismic activation of Southern California. These two areas are antipodal to each other and often become active together. The exact antipode of these epicenter in the Southwest Indian Ridge is 32N 122W off the coast of Baja California but antipodal effects are not limited to the exact antipode but can affect nearby areas such as Baja and Southern California especially if this series is enhanced with larger magnitudes in coming days. The last earthquake within about 200 km of the Indian Ridge events with M>=5.1 occurred on July 12, 2016 with M 5.4. Forecast 118086 had expected this activity within about 100 km was likely around July 7. This activity is located at 103 degrees from the M 6.8 in Bolivia of April 2 and may have been promoted from that source.

 

O: 10JUL2018 05:04:22  31.6S   57.7E mb=4.7  EMSC   SOUTHWEST INDIAN RIDGE       

O: 10JUL2018 05:33:30  31.8S   58.1E mb=4.8  EMSC   SOUTHWEST INDIAN RIDGE       

O: 10JUL2018 07:26:57  31.8S   58.1E mb=5.1  EMSC   SOUTHWEST INDIAN RIDGE       

P:  7JUL2018 118086    32.0S   59.0E 4.0-5.8 BAAAA  So. Indian Ocean           

 

A moderate earthquake occurred with M 5.0 in Central Alaska today. NEIC reported

it was felt with intensity IV in Matanuska-Sustina Border and II-III in Denali National Park, Talkeetna, Healy, Willow, SkwentnaWasilla, Chugiak, Elmendorf AFB, and Palmer, Alaska among other communities. The last earthquake of M>=5 within about 100 km of this epicenter occurred on July 1, 2018 also with M 5.0. The last of larger magnitude was an M 5.2 on April 29, 2017. Forecast 118055 had expected this event within this region was likely around July 8.

 

O: 10JUL2018 01:08:20  63.0N  150.6W mb=5.0  EMSC   CENTRAL ALASKA               

P:  8JUL2018 118055    62.6N  151.4W 3.2-5.3 AAAAA  Central Alaska             

 

An M 3.1 east of San Francisco, California today was reported felt with intensity II-III in Central California at Morgan Hill, San Martin, Gilroy, San Juan Bautista, San Jose, Soquel, Sunnyvale, Mountain View, Santa Cruz and Pacific Grove, California. The last earthquake of M>=3.1 within about 40 km of this epicenter was an M May 15, 2018 (M 3.2) and prior to that March 11, 2018 (M 3.4). Forecast 117969 had expected activity in this area around June 6.

 

O: 10JUL2018 00:00:07  37.1N  121.5W ML=3.1  EMSC   NORTHERN CALIFORNIA          

O: 10JUL2018 06:41:16  37.2N  121.5W MD=2.2  EMSC   NORTHERN CALIFORNIA          

P:  6JUL2018 117969    37.8N  122.6W 2.5-4.4 BAAAA  Central California         

 

An earthquake of M 5.3 was associated with a strong eruption of Kilauea, Hawaii today. NEIC reported it was felt with intensity II-III in Hawaii National Park, Volcano, Mountain View, Hilo, Pepeekeo and Honomu, Hawaii.  A number of other smaller earthquakes were also felt in Hawaii near Volcano.

 

O:  9JUL2018 19:20:46  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P:  9JUL2018 117953    19.4N  155.3W 4.0-5.7 AAAAA  Hawaii area                

 

An unusual earthquake of M 4.1 occurred in the North Atlantic east of Massachusetts today. This event may be related to stress redistribution associated with Hurricane Chris currently located south of this epicenter.

 

O:  9JUL2018 07:16:47  43.3N   55.9W ML=4.1  NRCA  Atlantic Ocean.               

 

Moderate earthquakes also occurred today in the region of Guam (M 4.2) and in  the Northern Mariana Islands (M 4.8). These were probably promoted by the passage of Super-Typhoon Maria as previous noted in this summary:

 

 

"Super-Typhoon Maria (TS 10W) continued today over Guam with winds up to 150 kts. It is expected to track to the northwest passing over Guam as a typhoon on

July 5-6. This storm could trigger a moderate to large quake in the region of Guam and the southern Mariana Islands which are currently seeing seismicity at moderately high levels." (July 7, 2018)

 

Forecast 117949 had expected the event in Guam was likely within about 50 km  around July 6 whereas the M 4,8 in the Northern Mariana Islands was expected within about 50 km around July 6 as well.

 

NEIC reported this earthquake of M 4.2 in Guam was felt with intensity II-III in the area(s) of Tamuning, Guam.

 

O:  9JUL2018 08:31:22  13.5N  145.0E mb=4.2  EMSC   GUAM REGION                  

P:  6JUL2018 117949    14.0N  145.0E 4.0-5.4 BAAAA  So. Marianas/Guam          

 

O:  9JUL2018 21:41:19  18.2N  145.5E mb=4.8  EMSC   PAGAN REG., N. MARIANA ISLANDS

P:  6JUL2018 117945    18.0N  146.0E 4.0-5.5 BAAAA  No. Marianas               

 

MODERATE QUAKES IN HAWAII AND ALASKA

 

EARTHQUAKE SUMMARY FOR JULY 8, 2018

 

Moderate earthquakes hit in Hawaii (M 5.4) and in the Aleutian Islands of Alaska (M 5.2, 4.6) today. The strongest earthquake of the day, however was an M 5.5 in southern Vanuatu, a region which has been active in the past several days including an M 5.5 in New Caledonia yesterday. Forecast 118073 expected today's event in Vanuatu was likely within about 100 km around July 6.  NEIC reported this earthquake of M 5.5 in Vanuatu was felt with intensity II-III in the area(s) of Vila, Shefa, Vanuatu. It is located at the seventh node (51 degrees) from Hawaii and was probably promoted from that source.

 

O:  8JUL2018 21:04:36  19.0S  169.5E Mw=5.5  EMSC   VANUATU                      

P:  6JUL2018 118073    20.0S  169.0E 4.0-5.4 AAAAA  Vanuatu Islands            

 

The strongest earthquake in the U.S. or Canada today was an M 5.4 associated with a strong eruption at Kilauea, Hawaii. It was reported by NEIC to have been felt with intensity II-III in Volcano, Keaau, Pepeekeo, and Kaunakakai, Hawaii. Many smaller events were also felt lightly in the Volcano, Hawaii area. This is one of the strongest daily eruptions in Hawaii since early May and was associated with a number of light earthquakes felt in the Volcano area of Hawaii.

 

O:  8JUL2018 12:54:50  19.4N  155.3W Mw=5.4  EMSC   ISLAND OF HAWAII, HAWAII     

P:  9JUL2018 117953    19.4N  155.3W 4.0-5.7 AAAAA  Hawaii area                

 

The strongest earthquake outside Hawaii in the U.S. or Canada today was an M 5.2 in the eastern Andreanof Islands, Aleutians. It was joined by an M 4.6 in the Fox Islands, Aleutians. This is part of an enhanced period of seismicity in Alaska over the past week and this is expected to continue for several more days. The earthquake of M 5.2 in the eastern Andreanof Islands breaks a long quiet for that region. The last earthquake of M>=5.2 within this region of the eastern Andreanof Islands occurred more than a year ago on June 17, 2017. Strong quakes hit the region with M 6+ in March 2016. Forecast 118038 had expected

today's unfelt event was likely around July 6.

 

O:  9JUL2018 02:42:28  51.5N  174.7W mb=5.2  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P:  6JUL2018 118038    51.7N  174.3W 3.5-4.9 BAAAA  Andreanoff Isls, Aleutians 

 

The last earthquake in the Fox Islands within about 150 km of today's epicenter with M>=4.6 was an M 4.6 on May 18, 2018. The last of greater magnitude was an  M 4.9 on December 10, 2017. A strong M 5.9 hit the area on May 24, 2017. Forecast 118041 had expected today's event in this area was likely around July 10.

 

O:  9JUL2018 03:16:09  52.6N  166.5W mb=4.6  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 10JUL2018 118041    51.8N  166.4W 3.5-4.9 AAAAA  Fox Islands, Aleutians     

 

STRONG EARTHQUAKE FELT NEAR TOKYO, JAPAN

 

EARTHQUAKE SUMMARY FOR JULY 7, 2018

 

A strong earthquake of M 5.9-6.0 was widely felt in Honshu, Japan near Tokyo today. As Typhoon Prapiroon is the first typhoon of the season to settle over Honshu, residual stresses unrelieved in months placed on the area by Typhoon Prapiroon as reported and expected in previous summaries probably helped trigger this quake:

 

"Typhoon Prapiroon (09W) continued today in the region over northern Honshu, Japan with winds up to 55 kts. It is expected to track to the north possibly affecting seismicity in Honshu, Japan as it set up over the island. This can lead to unloading conditions on the island which could help promote a strong regional earthquake in the next several days." (July 2-5, 2018)

 

Today's earthquake was widely felt with maximum intensity V-VI in Tokyo and Saitama Prefecture. Intensity IV was reported by NEIC from the Prefectures of Aichi, Yamanashi, Kanagawa, Chiba, with lesser II-III shaking in Ibaraki, Shizuoka, Gunma, Tochigi, Nagano, Miyagi, and Ishikawa Prefectures, Japan. No major damage was reported. The last earthquake in the region of Tokyo within about 100 km of this epicenter with M>=5.9 occurred as an M 6.2 about 100 km east of today's epicenter on September 23, 2016 (M 6.2) and prior to that an M 6.0 to the west on May 4, 2014. Forecast 117893 had expected a moderate regional event around July 10. This epicenter is located at the seventh node (51 degrees) from the great Alaska quake of January 23, 2018 (M 8.0) and was probably promoted from that source.

 

O:  7JUL2018 11:23:48  35.1N  140.6E Mw=5.8  EMSC   NEAR EAST COAST OF HONSHU, JAP

O: 07JUL2018 11:23:49  35.1N  140.7E mw=5.9  ANSS   SE of Ohara Japan

P: 10JUL2018 117983    35.0N  137.0E 3.5-4.9 BACAA  No. Honshu, Japan          

 

The earthquake in Honshu, Japan was followed later in the day by a similar event of M 5.9 in the Kermadec Islands of New Zealand. Together these suggest that the global seismic quiet which has persisted for more than two months is now over. These events may also have been promoted by an increase in solar activity including a C1.6 flare yesterday as noted in this summary:

 

 

"A solar flare (#6620) of C1.6 today was the strongest such event seen on the sun since a C2.7 on May 28, 2018. No major earthquakes were associated with this flare which is probably too small still for much SFE. Some areas particularly sensitive to changes in the geomagnetic field associated with strong solar flares are near the geomagnetic equator or along the western Pacific subduction zone." (July 7, 2018)

 

The Tonga-Kermadec arc is about 10 degrees south of the geomagnetic equator  in the western Pacific subduction zone and matches the parameters where a strong quake was possible at this time. The last earthquake in the Kermadec Islands of M>=6 was an M 6.2 on December 8, 2017 and prior to that an M 6.0 on June 28, 2017. Forecast 118087 had expected today's event within about 100 km of the epicenter was likely around July 7.

 

O:  7JUL2018 21:33:49  30.7S  177.9W Mw=6.0  EMSC   KERMADEC ISLANDS, NEW ZEALAND

O: 07JUL2018 21:33:49  30.6S  178.0W mw=5.9  ANSS   L'Esperance Rock New Zealand

P:  7JUL2018 118087    31.0S  177.0W 4.0-5.7 AAAAA  So. Kermadec Islands       

 

A moderately strong M 5.5 earthquake also occurred today in the New Caledonia region west of the Loyalty Islands.  NEIC reported this earthquake of M 5.5 in New Caledonia was felt with intensity II-III in the area(s) of We and Noumea, New Caledonia.  The area of New Caledonia is near the Loyalty Islands which is highly seismic. The last earthquake of M>=5.5 in the region of New Caledonia within about 100 km of today's epicenter was an M 7.0 and aftershock of M 5.8 on November 19-20, 2017. Today's event may be the largest aftershock to date of that event. Forecast 118073 had expected this activity around July 6. More such events are likely in the area of southern Vanuatu and the Loyalty Islands in the next several days.

 

O:  8JUL2018 01:08:28  21.2S  168.5E Mw=5.5  EMSC   LOYALTY ISLANDS               

P:  6JUL2018 118073    20.0S  169.0E 4.0-5.4 ABAAA  Vanuatu Islands            

 

A moderate earthquake of M 4.8 occurred today as Super-typhoon Maria passed through the region of the central Mariana Islands. It was probably triggered by stresses related to this storm as noted in previous issues of this summary:

 

"Super-Typhoon Maria (TS 10W) continued today west of the northern Mariana Islands with winds up to 165 kts. This storm could trigger a moderate to large quake in the region of the northern Marianas Islands which are currently seeing seismicity at moderately high levels. It is expected to track to the west hitting the Chinese mainland around July 11 near Shanghai and north of Taiwan where seismicity is expected to be enhanced at that time." (July 7, 2018)

 

Forecast 117949 expected this activity around July 6.

 

O:  7JUL2018 17:48:08  15.7N  147.0E mb=4.8  EMSC   MARIANA ISLANDS REGION       

P:  6JUL2018 117949    14.0N  145.0E 4.0-5.4 ABBAA  So. Marianas/Guam          

 

The strongest earthquake in the U.S. or Canada today was an M 4.0 in Southern Alaska. The last event within about 150 km of this epicenter with M>=4 occurred on March 9, 2018 (M 5.1). Forecast 118054 had expected today's event within about 50 km to occur around July 7.

 

O:  7JUL2018 13:15:32  59.7N  153.8W ML=4.0  EMSC   SOUTHERN ALASKA              

P:  7JUL2018 118054    60.1N  153.4W 3.2-5.0 AAAAA  Central Alaska             

 

MODERATE QUAKE IN BISMARCK SEA MAY PRECEDE ENHANCED GLOBAL ACTIVITY

 

EARTHQUAKE SUMMARY FOR JULY 6, 2018

 

The earth was at quiet conditions with few noteable earthquakes today. The largest was an M 5.4 unfelt in the Bismarck Sea east of New Guinea. In the U.S. the strong eruption of Kilauea, Hawaii continued unabated with an eruption associated with an earthquake of M 5.2. An unusual earthquake also occurred as an M 2.8 in Alabama today. The event of M 5.4 in the Bismarck Sea was the strongest within about 200 km of that epicenter since an M 6.3 on January 26, 2018 and may be a regional aftershock of that event. Forecast 117922 had expected this event to the southeast was likely around July 6.

 

O:  6JUL2018 17:40:54   4.0S  146.8E Mw=5.4  EMSC   BISMARCK SEA                 

P:  6JUL2018 117922     7.0S  148.0E 4.0-5.6 ACAAA  New Ireland                

 

The strongest quake in the U.S. was an M 5.2-5.3 associated with the current strong eruption of Kilauea in Hawaii. NEIC reported it was felt with intensity IV in Volcano and Hawaii National Park and II-III in Pepeekeo, Hawaii.  Many other smaller events were also lightly felt in the region of Volcano, Hawaii.

 

O:  7JUL2018 04:04:38  19.4N  155.3W Mw=5.2  EMSC   ISLAND OF HAWAII, HAWAII     

P:  7JUL2018 117953    19.4N  155.3W 4.0-5.7 AAAAA  Hawaii area                

 

The most unusual earthquake in the U.S. or Canada today was an M 2.8 in Alabama. NEIC reported this earthquake of M 2.8 in Alabama was felt with intensity II-III in the area(s) of Alabama at Florence, Muscle Shoals and Tuscumbia and in Winchester, Tennessee. The last earthquake of M>=2 in Alabama occurred as an M 2.3 on April 21, 2018, but the last of M>=2.8 was an M 3.0 on April 29, 2016 and prior to that an M 2.8 on September 24, 2013. Forecast 117999 had expected regional seismicity in the southeast U.S. around July 6. This epicenter is located at the sixth node (60 degrees) from Hawaii and was probably promoted by energy from that area.

 

O:  6JUL2018 09:29:42  34.7N   87.7W MD=2.8  EMSC   ALABAMA                      

P:  6JUL2018 117999    34.0N   85.0W 2.0-4.4 AABAA  Southeast U.S.             

 

A solar flare (#6620) of C1.6 today was the strongest such event seen on the sun since a C2.7 on May 28, 2018. No major earthquakes were associated with this flare which is probably too small still for much SFE. Some areas particularly sensitive to changes in the geomagnetic field associated with strong solar flares are near the geomagnetic equator or along the western Pacific subduction zone. An earthquake in Japan continues to be a possibility as Typhoon Prapiroon in this area as noted in the previous issues:

 

 

"Typhoon Prapiroon (09W) continued today in the region over northern Honshu, Japan with winds up to 55 kts. It is expected to track to the north possibly affecting seismicity in Honshu, Japan as it set up over the island. This can lead to unloading conditions on the island which could help promote a strong regional earthquake in the next several days." (July 2-5, 2018)

 

A moderate quake in the Sea of Okhotsk of M 4.7 was probably promoted from stresses associated with Prapiroon. This may be a regional aftershock of the M 6.0 which hit about 300 km southwest of this on July 1. Forecast 118032 expected today's event within about 50 km was likely around July 9.

 

O:  7JUL2018 05:42:15  48.4N  146.3E mb=4.7  EMSC   SEA OF OKHOTSK               

P:  9JUL2018 118032    48.0N  147.0E 3.5-5.4 AAAAA  So. Kurils                 

 

STRONG EARTHQUAKE FELT IN KAMCHATKA, RUSSIA

 

EARTHQUAKE SUMMARY FOR JULY 5, 2018

 

As expected in this summary in previous issues, a strong earthquake of M 6.1 was promoted in Kamchatka as the eye of Typhoon Prapiroon moved through the area. This summary had noted this possibility in the previous issue as:

 

"Moderate earthquakes in and near Honshu, Japan continued today with an M 4.4 near the south coast of Honshu and an M 4.2 off the east coast of Honshu. ... These may have been promoted by Typhoon Prapiroon which is currently located over the northern Kuril Islands and near Kamchatka where a strong earthquake could be triggered by stresses from this storm. This summary had previous noted this as:

 

"Typhoon Prapiroon (09W) continued today in the region over northern Honshu, Japan with winds up to 55 kts. It is expected to track to the north possibly affecting seismicity in Honshu, Japan as it set up over the island. This can lead to unloading conditions on the island which could help promote a strong regional earthquake in the next several days." (July 2-5, 2018)

 

NEIC reported this earthquake was felt with intensity V in Kamchatka at Petropavlovsk and Mohovaja and in Jelizovo, Kamchatka with intensity III. The mainshock was followed by an M 5.4 aftershock about 250 km to the northeast of the mainshock. The last earthquake in this area of Kamchatka within about 300 km of these epicenters occurred on March 20, 2016 (M 6.4) and prior to that an M 7.2 on January 30, 2016.  Forecast 117827 had expected a possibly strong quake in Kamchatka at the end of June or in early July. Like recent unusual events in Nebraska, Oklahoma, and Mexico, this epicenter is located near the seventh node from Hawaii and may have been  promoted from that source.

 

O:  6JUL2018 01:40:07  51.6N  157.9E Mw=6.1  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 28JUN2018 117827    51.0N  156.0E 4.0-5.7 BAAAA  Kamchatka                  

 

O:  6JUL2018 04:32:19  53.0N  160.3E mb=5.4  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 26JUN2018 117824    52.0N  160.0E 4.0-5.8 CAAAA  E. of Kamchatka            

 

The strongest earthquake in the U.S. or Canada outside Hawaii today occurred in Nevada near the California border with M 4.5. NEIC reported it was felt with intensity V in Tecopa and II-III in Nevada at Pahrump, Las Vegas, Jean, and Henderson. This moderate earthquake of M 4.5 shook areas of Central California and southern Nevada today. This event is located near Las Vegas and is the strongest within about 100 km of this epicenter since an M 4.6 16 years ago on June 14, 2002. An aftershock of the Landers earthquake in June, 29, 1992 of M 5.8 was the strongest event in the area since 1990.  Forecast 117725 had expected the area to be active at the end of June or in early July. This epicenter is located at 103 degrees from the Papua New Guinea quake of February 25, 2018 of M 7.5. This summary has long maintained triggering from this source was likely in Southern California and Nevada.

 

O:  5JUL2018 15:17:36  35.9N  115.8W ML=4.5  EMSC   CENTRAL CALIFORNIA            

P: 29JUN2018 117725    37.8N  115.8W 2.5-4.6 CBAAA  California/Nevada area     

 

 

The strongest earthquake in Alaska was an M 4.7 in Central Alaska near Anchorage. NEIC reported it was felt with intensity II-III in Anchorage, Wasilla, Elmendorf AFB, Willow, Eagle Rive, Talkeetna, Girdwood and Fairbanks, Alaska. The last earthquake within about 150 km of this epicenter in southern or central Alaska was an M 4.9 on August 11, 2017 about 150 km to the southwest of this epicenter. Forecast 117842 had expected this activity within about 50 km of the epicenter.

 

O:  6JUL2018 02:07:12  61.5N  151.2W mb=4.7  EMSC   SOUTHERN ALASKA              

P: 29JUN2018 117842    61.3N  152.3W 3.2-5.1 CAAAA  Central Alaska             

 

The strongest quake in the U.S. was an M 5.2 associated with the current strong eruption of Kilauea in Hawaii. NEIC reported it was felt with intensity IV in Volcano and II-III in Mountain View, Hilo, Keaau and Papaikou, Hawaii. Many other smaller events were also lightly felt in the region of Volcano, Hawaii.

 

O:  5JUL2018 23:20:50  19.4N  155.3W ML=5.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 CAAAA  Hawaii                     

 

ENHANCED SEISMICITY CONTINUES IN EASTERN MEDITERRANEAN AREA

 

EARTHQUAKE SUMMARY FOR JULY 4, 2018

 

Seismicity in the area of the eastern Mediterranean Sea remained at high levels today. This included an M 4.8 in the Dead Sea area of Israel, the strongest in the current swarm and an M 5.0 in Albania, an unusually large quake for Albania.

The swarm of earthquakes in Israel in the Dead Sea area continued and enhanced today with an M 4.8. NEIC reported it was felt in Israel in Hazafon with intensity IV in Eilabun, Yavne'el, Rame, Zefat, Rosh Pinna, Shagor, Hazor HaGelilit. Lesser shaking of II-III was felt in Israel at Nazerat Illit, Nazerat, Iksal, Sajur, Ilut, Karmiel, Neink Peqi'in, Sulam, Timrat, Kisra-Sumei, Afula, Jish, Tuba-Zangariyye, Hazor HaGelilit, Kefar Weradim, Qiryat Tiv'on, Yoqnw'qm Illit, in Haifa at Rekhasim, in Jordan at al-Mugayyir and al-Mansiyah, and in general within about 200 km of the epicenter. It was also reported felt in Lebanon, Saudi Arabia, Syria and Jordan. The last earthquake of M>=4.8 in the Dead Sea region was an M 5.1 on February 15, 2008 more than 10 years ago.  Forecast 117771 had expected this activity in late June or early July.

 

O:  4JUL2018 19:45:40  32.8N   35.5E mb=4.5  EMSC   DEAD SEA REGION              

O:  4JUL2018 19:45:40  32.8N   35.5E mb=4.8  ANSS   DEAD SEA REGION              

O:  4JUL2018 21:49:27  32.9N   35.6E ML=3.5  EMSC   DEAD SEA REGION              

P: 28JUN2018 117771    34.0N   32.0E 3.5-5.2 CAAAA  Turkey                     

 

An unusual earthquake of M 5.0 was felt in Albania with intensity VI in Berat, Albania and V in Albania at Durres, Kruje, Tirana, and IV in Kavaje, Elbasan, Albania among other communities. Lesser shaking was reported more than 100

km from the epicenter in Serbia and Montenegro at Podgorica, Ulcinj, Niksic; in Macedonia at Dolna Banjica, Sopiste; in Cavtat and Dubrovnik, Croatia and as far as Bari, Italy. An aftershock of M 4.4 shook regions of Albania today. NEIC reported intensity VI in Tirana and III in Kavaje, Albania. No major damage was reported. The last earthquake within about 150 km of this epicenter in Albania with M>=5 occurred on May 19 and December 29, 2014 with M 5.0 and prior to that on September 6, 2009. Forecast 117777 had expected today's epicenter would be active within about 50 km at the end of June or in early July. Like much of the current unusual global activity this epicenter is located at a nodal distance from Hawaii (node 3, 120 degrees) suggesting some promotion from that source.

 

 

O: 04JUL2018 11:35:32  41.4N   19.5E ML=3.8  EMSC   ALBANIA

O: 04JUL2018 16:36:07  41.4N   19.6E ML=3.5  EMSC   ALBANIA

O: 04JUL2018 11:30:45  41.5N   19.5E ML=3.3  EMSC   ADRIATIC SEA

O: 04JUL2018 09:08:58  41.5N   19.5E ML=4.2  EMSC   ADRIATIC SEA

O: 04JUL2018 11:24:20  41.5N   19.5E mb=4.4  EMSC   ALBANIA

O: 04JUL2018 12:06:18  41.5N   19.6E ML=3.1  EMSC   ALBANIA

O: 04JUL2018 13:33:30  41.5N   19.6E ML=3.6  EMSC   ALBANIA

O: 04JUL2018 11:42:22  41.6N   19.5E ML=3.5  EMSC   ADRIATIC SEA

O: 04JUL2018 09:11:30  41.6N   19.6E ML=3.0  EMSC   ALBANIA

O: 05JUL2018 01:39:47  42.3N   18.9E ML=3.6  EMSC   MONTENEGRO

O: 04JUL2018 09:01:08  41.4N   19.5E mw=5.0  ANSS   NNW of Shijak Albania

O:  4JUL2018 09:01:08  41.4N   19.5E mb=4.9  EMSC   ALBANIA                      

P: 24JUN2018 117777    42.0N   19.0E 3.0-5.1 CAAAA  Adriatic Sea               

P: 29JUN2018 117805    40.0N   21.0E 3.0-4.9 BBAAA  Romania/NW Turkey          

 

The strong eruption of Kilauea volcano in Hawaii continued today. The strongest associated earthquake was an M 5.3 that was felt with intensity V in Hawaii at Volcano, Kaunakakai and II-III in Mountain View, Hilo and Keaau, Hawaii.

The current eruption at Hawaii and in the Galapagos and Guatemala may related to higher surface temperatures around the world over the past decades. This may finally be reaching deep enough to affect magma chambers. Small changes in temperature are amplified in volatility and viscosity in magma leading to additional movement and possible eruptions. Global modelers of climate change need to take this into account in their models as it would be a cooling effect from gasses and particulates from erupting volcanoes which may increase in the next several decades. In the near term the eruption of Hawaii appears to be continuing to depress global seismicity as it relieves some stress in earthquake-prone areas.

 

O:  4JUL2018 20:19:10  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 CAAAA  Hawaii                     

 

The strongest earthquake in the world today was an M 5.5 in Vanuatu. NEIC reported it was felt with intensity V in Luganville, Sanma, Vanuatu.

The last earthquake of M>=5.5 in northern Vanuatu occurred on June 28, 2018 (M 5.5). The only other event in this area of M>=5.5 in the past half year was an M 5.8 on April 30, 2018. Forecast 117863 expected this area would be active with moderate seismicity at the end of June or in early July. Like the continuing swarm in Nebraska and Oklahoma, this epicenter is located at the seventh node from Hawaii (51 degrees).

 

O:  4JUL2018 16:37:04  14.9S  167.4E Mw=5.5  EMSC   VANUATU                      

P: 28JUN2018 117863    12.0S  166.0E 4.0-5.8 CCAAA  Vanuatu Islands             

 

Moderate earthquakes in and near Honshu, Japan continued today with an M 4.4 near the south coast of Honshu and an M 4.2 off the east coast of Honshu. Forecasts 117735 and 117751 expected this activity within about 100 km of the epicenters. These may have been promoted by Typhoon Prapiroon which is currently located over the northern Kuril Islands and near Kamchatka where a strong earthquake could be triggered by stresses from this storm. This summary had previous noted this as:

 

"Typhoon Prapiroon (09W) continued today in the region over northern Honshu, Japan with winds up to 55 kts. It is expected to track to the north possibly affecting seismicity in Honshu, Japan as it set up over the island. This can lead to unloading conditions on the island which could help promote a strong regional earthquake in the next several days." (July 2-4, 2018)

 

O:  4JUL2018 11:04:10  33.0N  136.0E mb=4.4  EMSC   NEAR S. COAST OF WESTERN HONSH

P: 27JUN2018 117735    34.0N  137.0E 3.5-4.9 CAAAA  Central/So. Honshu Japan   

 

O:  5JUL2018 05:40:32  37.4N  141.5E mb=4.2  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 28JUN2018 117751    39.0N  141.0E 4.0-5.7 CBAAA  Off East Coast Honshu      

 

DEAD SEA SEES MINOR SWARM

 

EARTHQUAKE SUMMARY FOR JULY 3, 2018

 

An unusual series of earthquakes including two of M 4.0 in the Dead Sea area of Israel was widely felt today. NEIC reported intensity II-III in Hazafon at Bu'eine, Tiberias, Yavne'el, Segev-Shalom, and Zefat; in Haifa at Baqa-Jatt and in Be'er Sheva, Hadarom and Bayurt, Lebanon. Earthquakes in the region are occasionally felt. The tectonics is not unlike that in the San Andreas Fault zone in California and is expected at this time with horizontal motions active throughout the world, likely related to the volcanic eruption at Kilauea. Because of the political instability and the potential for a strong earthquake in the region, the area is closely watched by many geoscientists. The last earthquake of M>=4 within about 200 km of this epicenter was an M 4.4 on January 8, 2017 and prior to that an M 4.1 on July 30, 2015. Forecast 117771 had expected this activity was likely at the end of June. The Dead Sea is at 107 degrees from Papua New Guinea and Bolivia, sites of recent large earthquakes and at the fourth node (90 degrees) from the great Gulf of Alaska quake and may have been promoted from these sources.

 

O: 04JUL2018 03:41:21  32.8N   35.6E Mm=2.1  EMSC   DEAD SEA REGION

O: 04JUL2018 01:50:08  32.8N   35.6E mb=4.0  EMSC   DEAD SEA REGION

O: 04JUL2018 04:19:18  32.9N   35.6E ML=2.8  EMSC   DEAD SEA REGION

O: 04JUL2018 01:58:13  32.9N   35.6E ML=3.3  EMSC   DEAD SEA REGION

O:  4JUL2018 03:52:00  32.9N   35.6E ML=4.0  EMSC   DEAD SEA REGION              

P: 28JUN2018 117771    34.0N   32.0E 3.5-5.2 CBCAA  Turkey                     

 

The strongest seismicity in the world continued today in the region of Indonesia and the Philippines. The largest since last report was an M 5.3 in the Andaman Islands, India however an M 5.6, reported in the previous summary also occurred in southern Mindanao, Philippines. The last earthquake in the Andaman Island, India within about 200 km of this epicenter occurred on February 13, 2018 with M 5.6. An M 5.3 also occurred on April 5, 2017. Forecast 117674 had expected this event was likely within about 100 km of this epicenter around June 29.

 

O:  4JUL2018 07:12:51  13.1N   92.5E mb=5.3  EMSC   ANDAMAN ISLANDS, INDIA REGION

P: 29JUN2018 117674    14.0N   92.0E 4.0-5.6 BAAAA  Andaman Islands            

 

The strongest earthquake in the U.S. today was an M 5.2 associated with a strong eruption at Kilauea, Hawaii. NEIC reported it was felt with intensity IV in Volcano and III in Hilo and Kaunakakai, Hawaii.

 

O:  3JUL2018 12:17:03  19.4N  155.3W Mw=5.1  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 CAAAA  Hawaii                     

 

The strongest earthquake in the U.S. outside Hawaii today was an M 4.3 in the eastern Andreanof Islands of Alaska. This is the strongest earthquake in eastern Andreanof Islands since a similar M 4.3 on January 28, 2018. Forecast 117821 had expected this activity at the end of June.

 

O:  3JUL2018 18:17:14  51.6N  173.7W mb=4.3  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 26JUN2018 117821    52.4N  174.3W 3.5-5.1 CAAAA  Andreanoff Isls, Aleutians 

 

EARTHQUAKES SHAKE PHILIPPINES AND TAIWAN

 

EARTHQUAKE SUMMARY FOR JULY 2, 2018

 

A series of moderate earthquakes today hit the regions of the Philippines and Taiwan. They were largest in the region of central Luzon (M 5.4) and southern Mindanao, Philippines (M 5.6). These were probably promoted by several typhoons in the area over the past several days as noted in previous issues of this summary:

 

 

"TS Prapiroon (09W) continued today in the region east of Taiwan and the Northern Philippines with winds up to 65 kts. It is expected to track to the north possibly affecting seismicity in Taiwan and the Ryukyu Islands through early July." (July 1, 2018)

 

and

 

"Typhoon Prapiroon (09W) continued today in the region of the Ryukyu Islands with winds up to 90 kts. It is expected to track to the north possibly affecting seismicity in Honshu, Japan as it set up over the island. This can lead to unloading conditions on the island which could help promote a strong regional earthquake in the next several days." (July 2, 2018)

 

The strongest earthquake in the world today was an M 5.4 in Luzon, Philippines.

NEIC reported it was felt in Southern Tagalog, Philippines at Payapa, Mendez, San Nicolas, Bitangan, Malabag, Solo, Bagalangit, Dasmarinas, Puting Kahoy, Aplaya, Kanluran, Carmona, Cavite, Imus, Bacoor, in Central Luzon at Orion, Bagac and in Manila and within about 200 km of the epicenter.  PHI reported it was felt with intensity IV in Nasugbu, Batangas, Luband and Abra de Ilog, Occidental Mindoro; III in Balayan, Tuy, Talisay and Calatagan, Batangas; Quezon City, Calrk, Pampanga, Mandaluyong City, Puerto Galera, Oriental Mindoro; Looc and Mamburao, Occidental Mindoro, Tanza and Maragondon, Cavity; Makati City, Pasay City, Tagaytay City and II in Manila City, Plaridel, Obando and Malolos, Bulacan; Paranaque City, Philippines.

 

O:  2JUL2018 12:47:39  10.2N  126.1E mb=4.9  EMSC   PHILIPPINE ISLANDS REGION    

O: 02JUL2018 12:47:32  10.4N  126.4E MS=4.9  PHI  Felt with intensity III

P: 26JUN2018 117689    10.0N  125.0E 3.5-4.9 CAAAA  Luzon, Philippines         

 

PHI reported the earthquake of M 5.4 was felt with intensity III in Burgos and Santa Monica, Surigao del Norte, Philippines.

 

O:  3JUL2018 04:25:54  14.0N  120.7E mb=5.4  EMSC   LUZON, PHILIPPINES           

O: 03JUL2018 04:25:54  13.9N  120.4E MS=5.2  PHI  Felt with intensity IV

P: 23JUN2018 117689    17.0N  120.0E 3.5-4.9 CCAAA  Luzon, Philippines         

 

The strongest earthquake in this series today was an M 5.6, also the strongest in the world today. PHI reported this earthquake was felt with intensity V Glan, Malapatan, Alabel and Malungon, Sarangani; Tupi and Polomolok, South Cotabato and IV in Mati City; Davao City; Sta Cruz, Davao del Sur, Philippines. Forecast 117644 had expected this event was likely at the end of June. The last earthquake within about 150 km of this epicenter with M>=5.6 was an M 5.8 on  August 5, 2017 and prior to that an M 6.9 on April 28, 2017.

 

O:  3JUL2018 11:59:23   5.8N  125.2E MS=5.6  PHI  Felt with intensity V Glan, Mala

P: 26JUN2018 117644     4.0N  126.0E 4.0-5.6 CBAAA  Mindanao, Philippines      

 

A series of four moderate earthquakes also shook the region of Taiwan today. CWB reported the M 4.5 and M 4.6 were felt with intensity IV in Chiayi County; III in Yunlin, Tainan, Changhua, II in Kaohsiung; I in Nantou, Taitung, Taichung, Pingtung, Penghu and Hualien Counties, Taiwan. The M 4.0 was felt in Chiayi with intensity IV; II in Yunlin, Tainan and Changhua and I in Kaohsiung Counties.

The second M 4.5 was reported felt with intensity IV in Kaohsiung; III in Taitung; II in Chiayi and Yunlin and I in Tainan, Pingtung, Hualien, Nantou, Taitung, Taichung Counties, Taiwan. NEIC reported this earthquake of M 4.2 in Taiwan was felt with intensity VI in Chiayi and II-III in the area(s) of Taichung, Taiwan. Forecast 117718 had expected this activity was likely at the end of June.

 

O:  2JUL2018 07:26:10  23.5N  120.5E ML=4.5  TAI    Hualien, Taiwan              

O: 03JUL2018 09:20:55  23.2N  121.0E Mw=4.6  EMSC   TAIWAN

O: 02JUL2018 19:36:59  23.5N  120.5E ML=4.0  EMSC   TAIWAN

O: 02JUL2018 07:26:10  23.5N  120.5E ML=4.2  EMSC   TAIWAN

O:  2JUL2018 07:26:27  23.4N  120.5E ML=4.6  TAI    Hualien, Taiwan              

O:  2JUL2018 19:36:59  23.4N  120.5E ML=4.0  TAI    Hualien, Taiwan               

O:  3JUL2018 09:20:54  23.1N  120.9E ML=4.5  TAI    Hualien, Taiwan              

P: 27JUN2018 117718    22.0N  121.0E 4.0-5.6 BBAAA  Taiwan                     

 

Light earthquakes in central Nebraska continued today. Some of these including an M 2.7 were felt with intensity II in Harvard, Nebraska nearly 200 km from the epicenter. An M 3.8 was reported felt with intensity IV in Arnold and Merna, Nebraska. This activity began early this week and may be related to an upsurge in  seismicity in Alaska over the past several days.

 

O:  2JUL2018 21:43:48  41.4N  100.1W mb=2.7  EMSC   NEBRASKA                     

O:  2JUL2018 16:25:50  41.4N  100.2W mb=3.8  EMSC   NEBRASKA                     

 

The strongest earthquake in the U.S. or Canada today occurred as an M 5.3 in association with a strong eruption of Kilauea Volcano in Hawaii. NEIC reported it was felt with intensity VII in Volcano, Hawaii and IV at Captain Cook with lesser shaking reported from Paauilo and Kailua Kona, Hawaii. More than 70 earthquakes of M>=3 were recorded in Hawaii today including a number lightly felt in Volcano, Hawaii. This represents one of the most active days since the eruption began.

 

O:  2JUL2018 11:24:25  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 BAAAA  Hawaii                     

 

The strongest earthquakes in the U.S. or Canada today occurred in the Unimak Island area of Alaska (M 4.5) and in the Alaska Peninsula (M 4.6). The earthquake in the Alaska Peninsula was the strongest within about 200 km of that epicenter since an M 4.6 on November 21, 2017. The last of significantly larger magnitude in this area was an M 5.3 on November 12, 2016.  Forecast 117817 had expected this are to be active in late June.

 

O:  3JUL2018 07:07:11  57.1N  158.0W mb=4.6  EMSC   ALASKA PENINSULA             

P: 29JUN2018 117817    54.7N  156.9W 3.5-5.3 BCAAA  Alaska Peninsula           

 

The earthquake in the Unimak Island area of Alaska (M 4.5)  was not reported felt in this remote area. The last event of M>=4.5 in the Unimak Island region was an M 4.8 a year ago on June 30, 2017. Forecast 117837 had expected this activity was likely at the end of June.

 

O:  2JUL2018 11:56:08  55.0N  163.0W mb=4.5  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 29JUN2018 117837    52.5N  163.7W 3.5-4.9 BCAAA  Unimak Islands, Aleutians  

 

STRONG EARTHQUAKE IN SEA OF OKHOTSK

 

EARTHQUAKE SUMMARY FOR JULY 1, 2018

 

An unusually large M 6.0 earthquake occurred today in the Sea of Okhotsk north of the Kuril Islands. This is the largest earthquake in the Sea of Okhotsk  since a M 6.1 on November 7, 2004 and prior to that an M 7.3 on November 17, 2002. This event occurred at a deep focus and was not reported felt on the surface which is in a remote area. Forecat 117809 had expected the area would be active at moderate to large levels at the end of June. This epicenter is at 144 degrees from the M 6.8 in Bolivia of April 2 and may have been promoted from that source.

 

O:  1JUL2018 20:45:41  46.9N  144.9E mb=6.0  EMSC   SEA OF OKHOTSK               

P: 28JUN2018 117809    47.0N  143.0E 3.5-5.5 BABAA  So. Kurils                 

 

A pair of moderate earthquakes hit the ends of the Atlantic Ocean today. The strongest of these was an unusual M 5.3 in the South Sandwich Islands region. A similar quake of M 5.3 occurred about 100 northwest of today's epicenter on April 24, 2018 but it has been 23 years since a larger quake hit the area on June 15, 1995 (M 5.7). The only other such event in the area since 1990 was an M 5.6 on May 30, 1995. Forecast 117900 had expected today's activity at the end of June.

 

O:  2JUL2018 03:09:14  60.7S   30.1W mb=5.3  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 26JUN2018 117900    61.0S   34.0W 4.0-5.6 BABAA  Southern  Ocean            

 

An hour after the event in the South Sandwich Islands, an M 4.9 occurred at the northern end of the Atlantic. These two may have been promoted by the recent geomagnetic storm. The event in Svalbard was not felt in this remote area. A similar event within about 100 km of today's epicenter occurred on June 5, 2018 with M 4.9. Forecast 117850 had expected it to the south at the end of June.

 

O:  2JUL2018 04:10:27  77.4N    7.8E mb=4.9  EMSC   SVALBARD REGION              

P: 28JUN2018 117850    74.0N   14.0E 3.0-4.6 BCAAA  Norway                     

 

The largest earthquake in the U.S. or Canada today was an M 4.2-4.5 in the Alaska Peninsula. It was not reported felt in the epicentral area. The last earthquake of equal or greater magnitude than M 4.2 within about 200 km of this epicenter was an M 5.1-5.3 on May 11, 2018. Forecast 117817 expected activity in the Alaska Peninsula around June 29.

 

O:  1JUL2018 19:54:54  57.0N  155.6W ML=4.2  EMSC   ALASKA PENINSULA             

P: 29JUN2018 117817    54.7N  156.9W 3.5-5.3 ACAAA  Alaska Peninsula           

 

 

EARTHQUAKE SERIES CONTINUES IN NEBRASKA; JOINED BY M 4.9 IN SOUTHERN ALASKA

 

EARTHQUAKE SUMMARY FOR JUNE 30, 2018

 

The M 4.2 in central Nebraska which occurred yesterday was followed today by a series of light to moderate earthquakes in the same area including an M 4.1-4.7.

This was accompanied by an unusually large M 4.9 in southern Alaska. These may be related as noted in the previous issue of this summary:

 

"The most unusual and largest earthquake in the U.S. or Canada outside Hawaii today was an M 4.2 in Nebraska. NEIC reported it was felt with intensity IV in Nebraska at Arnold and North Platte and II-III in Callaway, Stapleton, Brady. Earthquakes in this area often precede by hours to days moderate to strong earthquakes along the western rim of the North American Plate. These are usually in the region of Alaska but can occur as far south as California." (June 30, 2018)

 

The Nebraska quakes today were reported by NEIC to have been felt with intensity IV in Nebraska at Merna, Arnold, and Grand Island and II-III in Callaway, Stapleton and Moorefield. An M 3.7 was felt with intensity V in Arnold and III in Mason City, Nebraska. These events occurred near local solar midnight and may have been enhanced by high tidal stresses.

 

O: 01JUL2018 07:49:53  41.4N  100.1W mb=2.7  EMSC   NEBRASKA

O: 01JUL2018 08:12:16  41.4N  100.1W mb=3.7  EMSC   NEBRASKA

O:  1JUL2018 08:41:57  41.3N  100.1W mb=4.1  EMSC   NEBRASKA                     

 

The earthquake in Southern Alaska of M 4.9 was reported by NEIC to have been felt with intensity IV within about 150 km of the epicenter in Denali National Park, Matanuska-Sustina Border and Talkeetna and II-III in Cantwell, Healy, Willow, Skwentna, Wasilla, Chugiak, Elmendorf AFB, Palmer, Anchorage, Eagle River, Indian, Fairbanks, Girdwood, Sterling, Cooper Landing and Soldotna, Alaska. The largest of the Nebraska event (M 4.1) occurred 21.5 minutes after this M 4.9 in Alaska at a distance of 37 degrees (node 10). The surface waves from Alaska would have passed Nebraska within a minute of this time and probably helped trigger this subsequent event. It has been more than a year since an M 4.9 or greater quake hit this area of central Alaska within about 200 km of this epicenter. The last such events were of M 5.2 on January 31, 2017 and April 29, 2017. Forecast 117842 had expected today's event within about 20 km of the epicenter was likely at the end of June or in early July.

 

O:  1JUL2018 08:20:16  63.1N  150.8W ML=4.9  EMSC   CENTRAL ALASKA               

O: 30JUN2018 18:25:58  63.2N  151.6W ML=3.1  EMSC   CENTRAL ALASKA               

P: 24JUN2018 117842    63.2N  151.4W 3.2-5.3 CAAAA  Central Alaska             

 

A moderate swarm of earthquakes of M 3.4-3.8 occurred in the Virgin Islands region today.  NEIC reported this earthquake of M 3.8 in the Virgin Islands was felt with intensity II-III in the area(s) of Bayamon, Puerto Rico.  The last swarm in the area including an M 3.8 quake occurred on April 11, 2018 with M 4.2, 4.3 and 4.5. Forecast 117688 had expected this activity was likelyin the Virgin Islands at the end of June.

 

O: 01JUL2018 00:34:57  18.9N   64.3W MD=3.6  EMSC   VIRGIN ISLANDS REGION

O: 01JUL2018 03:02:17  19.0N   64.3W ML=3.5  EMSC   VIRGIN ISLANDS REGION

O: 01JUL2018 05:00:45  19.0N   64.5W ML=3.5  EMSC   VIRGIN ISLANDS REGION

O: 01JUL2018 03:17:31  19.1N   64.6W MD=3.4  EMSC   VIRGIN ISLANDS REGION

O: 01JUL2018 00:41:58  19.2N   64.5W MD=3.6  EMSC   VIRGIN ISLANDS REGION

O: 01JUL2018 03:39:39  19.2N   64.6W ML=3.8  EMSC   VIRGIN ISLANDS REGION

O:  1JUL2018 01:44:15  19.3N   64.4W MD=3.4  EMSC   VIRGIN ISLANDS REGION        

P: 27JUN2018 117688    18.0N   64.0W 3.0-5.0 BBAAA  Leeward Islands            

 

A strong eruption of Kilauea, Hawaii with associated magnitude M 5.3 was felt today with intensity IV in Volcano, Hawaii and II-III in Hilo, Kamuela and Wailuku.

 

O: 30JUN2018 21:45:29  19.3N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUL2018 07:22:49  19.3N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 07:44:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 08:35:51  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 09:05:00  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 11:40:56  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 11:51:00  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 19:05:45  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 19:19:50  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 20:26:42  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 21:15:46  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 22:16:04  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 22:21:10  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 22:33:30  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 23:07:45  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 07:02:59  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 09:03:02  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 09:11:08  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 09:58:33  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 10:39:08  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 12:49:49  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 12:59:17  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 14:27:12  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 19:00:35  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 19:10:56  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 07:05:08  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 08:42:51  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 08:44:17  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 10:48:47  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 13:08:33  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 19:07:40  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 20:19:41  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 21:47:05  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 21:53:14  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 22:22:29  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 08:38:30  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 14:19:12  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 14:21:55  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 19:12:38  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 23:39:03  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 14:20:31  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 20:15:49  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 21:20:35  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 11:48:51  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 20:23:00  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 21:22:35  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 23:13:23  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 16:05:01  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 13:09:34  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 07:06:10  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUL2018 00:48:05  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 13:10:41  19.4N  155.3W mb=4.1  EMSC   ISLAND OF HAWAII, HAWAII     

O: 01JUL2018 00:51:12  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 BAAAA  Hawaii                     

 

STRONG JALISCO, MEXICO QUAKE PROBABLY TRIGGERED UNUSUAL QUAKE IN NEBRASKA

 

EARTHQUAKE SUMMARY FOR JUNE 29, 2018

 

The strongest earthquake in the world today was an M 6.0 off the coast of Jalisco, Mexico. NEIC reported it was felt with intensity IV in Jalisco at San Patricio, Las Juntas and Cihuatlan and II-III in Jalisco at El Grullo, Talpa, Tenamaxtland, Mascota, Puerto Vallarta, Ixtapa, Ixtlan, Cocula, Guadalajara, Zapopan,   in Colima at Suchitlan, Manzanillo, Villa de Alvarez, in Bucerias, Nayarit; and in Morelia, Michoacan, Mexico.   This event was followed by unusual earthquakes in Nebraska (M 4.2) and the Gulf of Mexico. The earthquake in the Gulf of Mexico occurred within about 15 minutes of local solar midnight and was probably promoted by strong tidal stresses associated with the full moon which maximize at this hour. The only event in the past 30 years within about 250 km of this epicenter with M>=4.4 was an M 5.6 about 150 km northwest of today's epicenter on May 23, 2007. Forecast 117697 had expected regional activation towards the end of June.

 

O: 30JUN2018 06:14:44  21.4N   95.1W ML=4.4  EMSC   GULF OF MEXICO               

P: 25JUN2018 117697    19.0N   99.0W 3.5-5.2 BCCAA  Oaxaca, Mexico             

 

The M 6.0 in the area south of Jalisco, Mexico was the strongest in Jalisco, Mexico since an M 6.2 on June 7, 2016 and prior to that an M 7.6 on January 22, 2003. Forecast 117691 had expected this event within about 15 km of this epicenter was likely towards the end of June.

 

O: 30JUN2018 03:56:52  19.1N  105.1W Mw=6.0  EMSC   OFFSHORE JALISCO, MEXICO     

O: 30JUN2018 03:56:52  19.1N  105.1W mw=6.0  ANSS   San Patricio Mexico

P: 25JUN2018 117691    19.0N  105.0W 3.5-5.1 BAAAA  Michoacan, Mexico          

 

The most unusual and largest earthquake in the U.S. or Canada outside Hawaii today was an M 4.2 in Nebraska. NEIC reported it was felt with intensity IV in Nebraska at Arnold and North Platte and II-III in Callaway, Stapleton, Brady. Earthquakes in this area often precede by hours to days moderate to strong earthquakes along the western rim of the North American Plate. These are usually in the region of Alaska but can occur as far south as California. Today's earthquake in Nebraska may have been triggered by seismic energy from the M 6.0 off the coast of Jalisco Mexico which occurred 20 minutes earlier and probably disturbed ground waters in Nebraska. Ground waves as well as the ScS phase would have arrived in Nebraska several minutes before the earthquake there. The Nebraska event is located 23 degrees north of Jalisco and occurred 24 minutes after that event. The last earthquake of M>=4.2 within Nebraska and within about 100 km of this epicenter occurred on November 3, 2002 with M 4.2 in association with the great Denali, Alaska earthquake (M 7.9) of the same date. This was the only such event in the area since 1990. This earthquake in Nebraska is at 51.4 degrees (node 7) from Hawaii and also may have been promoted from that source.

 

O: 30JUN2018 04:20:26  41.4N  100.1W mb=4.2  EMSC   NEBRASKA                     

O: 30JUN2018 04:20:26  41.4N  100.1W mb=4.2  ANSS   Broken Bow Nebraska

 

An earthquake of M 2.1 also occurred north of Portland, Maine today but was not reported felt. The last earthquake of M>=2.1 within about 100 km of this epicenter was an M 2.1 on May 21, 2018. The only earthquake in the area in the past five years of M>2.1 was an M 2.6 on January 17, 2018. Forecast 117788 had expected regional activity near this epicenter in late June.

 

O: 29JUN2018 19:49:40  45.4N   69.0W ML=2.1  EMSC   MAINE                        

P: 23JUN2018 117788    44.0N   69.0W 2.0-4.1 CBAAA  Maine                      

 

An M 5.2 earthquake was associated with a strong eruption in Kilauea today. NEIC reported it was felt with intensity V in Volcano and II-III in Mountain View, Hilo and Pahoa, Hawaii. Smaller earthquakes were also felt in the Volcano area of Hawaii. More than 50 earthquakes of M>=3 were recorded in Hawaii today, one of the most active days since the eruption began in late April.

 

O: 29JUN2018 08:00:38  19.4N  155.3W MD=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 06:30:42  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 09:52:31  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 10:25:28  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 11:15:34  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 12:54:22  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 14:14:55  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 14:17:48  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 15:42:12  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 15:51:59  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 16:07:46  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 03:47:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 04:58:40  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 05:59:20  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 07:52:07  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 10:28:58  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 10:41:49  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 16:00:03  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 16:46:47  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 17:08:12  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 17:42:53  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 00:25:14  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 08:52:54  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 09:54:13  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 13:38:48  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 14:55:12  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 14:59:00  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 15:10:27  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 16:48:12  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 22:22:25  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 03:56:29  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 10:33:40  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 11:12:28  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 11:54:37  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 15:50:27  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 14:57:09  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 15:06:04  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 02:54:57  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 04:51:22  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 30JUN2018 04:52:45  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 12:50:56  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 15:52:59  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 17:05:55  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 14:16:26  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 17:48:21  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 12:49:48  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 17:46:29  19.4N  155.3W mb=4.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 12:47:45  19.4N  155.3W mb=4.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 17:50:46  19.4N  155.3W Mw=5.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 AAAAA  Hawaii                     

 

EQUATORIAL SEISMICITY INCREASES

 

EARTHQUAKE SUMMARY FOR JUNE 28, 2018

 

Seismicity in the world today began to return to normal background levels  especially along the geomagnetic equator. Moderate to moderately large quakes were registered in Vanuatu (M 5.5); Papua New Guinea (M 5.3). Strong swarms also continued near the equator in the Galapagos Islands. Much of this may have been promoted by geomagnetic effects from the latest geomagnetic storm as noted in previous issues of this summary:

 

"The geomagnetic field saw quiet conditions today. The AP level was 5 High latitude geomagnetic field saw disturbed conditions  with AP at 5. This concludes the strongest geomagnetic storm since June 1. Some increases in seismicity are likely around the end of June and early July especially near the geomagnetic equator and at high latitudes." (June 26-29, 2018)

 

O: 28JUN2018 16:47:50  15.1S  167.4E Mw=5.5  EMSC   VANUATU                      

P: 27JUN2018 117864    18.0S  168.0E 4.0-5.8 ACAAA  Vanuatu Islands             

 

O: 29JUN2018 01:55:31   5.9S  142.7E mb=5.3  EMSC   NEW GUINEA, PAPUA NEW GUINEA 

P: 28JUN2018 117665     5.0S  143.0E 4.0-5.5 AAAAA  Papua New Guinea           

 

NEIC reported this earthquake of M 5.3 in Papua New Guinea was felt with intensity II-III in the area(s) of Tari, Southern Highlands, PNG.

 

O: 29JUN2018 01:42:53   0.8S   91.1W ML=3.0  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 18:05:20   0.8S   91.1W ML=3.1  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 13:08:37   0.8S   91.1W ML=3.2  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 20:18:21   0.8S   91.1W ML=3.2  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 18:08:03   0.8S   91.1W ML=3.4  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 07:50:21   0.8S   91.1W ML=3.5  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 09:19:06   0.8S   91.1W ML=3.7  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 29JUN2018 05:50:29   0.9S   91.1W ML=3.0  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 12:24:31   0.7S   91.0W ML=3.0  EMSC   GALAPAGOS ISLANDS, ECUADOR    

O: 28JUN2018 13:33:45   2.9S   90.3W ML=3.9  EMSC   GALAPAGOS ISLANDS REGION     

P: 27JUN2018 117641     2.0N   91.0W 3.5-5.1 ACAAA  Galapagos Islands          

 

A strong eruption of Kilauea volcano in Hawaii today was accompanied by an earthquake of M 5.3. NEIC reported it was felt with intensity IV in Kaunakakai and II-III in Volcano and Mountain View, Hawaii. Fifty earthquakes of M>=3 were found in the area of Hawaii today. There appears to be some migration from Kilauea especially to the west of this activity and this may reflect changes in magma load beneath the Island.

 

O: 28JUN2018 14:14:32  19.3N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 04:34:36  19.4N  155.0W Ml=3.2  EMSC   HAWAII REGION, HAWAII

O: 28JUN2018 04:39:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:09:32  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:10:10  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 08:21:56  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 11:08:38  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 11:38:20  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 12:35:21  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 12:41:18  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 13:57:15  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:39:42  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 01:05:15  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 03:41:06  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 05:13:43  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 05:16:02  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 05:26:55  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:15:25  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:42:52  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 08:25:10  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 10:25:36  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 11:43:59  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 13:31:59  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:16:21  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:45:26  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:51:27  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 09:22:44  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 06:11:58  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:13:52  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 12:43:15  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 12:46:59  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:11:26  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:35:25  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:41:14  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 04:15:53  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 05:11:06  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 05:24:08  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:36:30  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 09:20:21  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 12:13:36  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 13:59:49  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 29JUN2018 00:16:42  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 13:44:44  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 10:31:23  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 10:27:13  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 07:44:42  19.4N  155.3W ML=4.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 10:32:46  19.4N  155.3W Ml=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 14:48:50  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 AAAAA  Hawaii                      

 

The strongest earthquakes in the U.S. or Canada outside Hawaii today continued in the Gulf of Alaska with events of M 3.8, 3.8 and 3.7 in the aftershock sequence there. This follows an uptick in the aftershocks in the area of the past four days. This included several events in the series of M 4.2. Forecast 117826 had expected this activity was likely around June 25.

 

O: 29JUN2018 02:23:13  56.1N  149.3W ML=3.8  EMSC   GULF OF ALASKA               

O: 28JUN2018 14:32:30  56.2N  149.3W ML=3.7  EMSC   GULF OF ALASKA               

O: 29JUN2018 05:57:40  56.5N  149.0W ML=3.8  EMSC   GULF OF ALASKA               

P: 25JUN2018 117826    55.9N  149.3W 3.5-5.0 AAAAA  Gulf of Alaska             

 

The strongest earthquake in the contiguous U.S. today was an M 3.2 in  Northern California in the Geysers area. This may have been affected by tidal stresses from the full moon which arrived today. The area is very sensitive to tidal effects. The tidal seismicity forecast in this summary had noted:

 

"The full moon will arrive at 04:53 UT on June 28, 2018. Longitudes where tidal stresses are greatest with this new moon are near 72W and 108E and include the eastern U.S., the Caribbean and western South America in the west and Southeast Asia Indonesia in the east. While tidal triggering is most likely in these regions with this new moon, it can occur in any area where tides mitigate seismicity." (June 26-29, 2018)

 

The last earthquake of M>=3.2 in the Geysers area occurred on May 10, 2018 with M 4.2 and prior to that an M 3.2 on April 21, 2018.  Forecast 117732 had expected this event within about 15 km of the epicenter around June 28.

 

NEIC reported this earthquake of M 3.2 in the Geysers, California with intensity II-III in the area(s) of Kelseyville, Geyserville, Middletown, Lakeport, Calistoga, Saint Helena, Santa Rosa and Yountville, California.

 

O: 28JUN2018 23:49:11  38.8N  122.8W ML=3.2  EMSC   NORTHERN CALIFORNIA          

O: 28JUN2018 16:23:32  38.8N  122.8W MD=2.0  EMSC   NORTHERN CALIFORNIA

O: 28JUN2018 17:46:56  38.8N  122.8W MD=2.2  EMSC   NORTHERN CALIFORNIA

O: 28JUN2018 10:11:45  38.8N  122.8W MD=2.4  EMSC   NORTHERN CALIFORNIA

P: 28JUN2018 117732    38.7N  122.7W 2.5-4.4 AAAAA  Central California         

 

QUIET GLOBAL SEISMICITY MAY BE ENTERING FINAL STAGES

 

EARTHQUAKE SUMMARY FOR JUNE 27, 2018

 

The very quiet seismic pattern in the world which has persisted since the eruption of Kilauea Volcano in Hawaii in early May may be in its final stages. Moderate earthquakes accompanying the full moon and the recent geomagnetic storm suggest enough seismic strain has now been built up to promote the occurrence of strong earthquakes in the near term. It will be noteworthy if a strong tidally triggered event occurs in the next several days or if Indonesia becomes active due to  geomagnetic effects.

 

The strongest earthquake in the world today was an M 5.4 in the Molucca Sea of Indonesia. It was not reported felt. Forecast 117643 expected this activity within about 50 km of this epicenter was likely around June 22-26. This is a typical response to strong geomagnetic storms such as has just occurred and may foreshadow larger regional seismicity in the near future.

 

O: 27JUN2018 06:44:21   0.6N  126.2E Mw=5.4  EMSC   MOLUCCA SEA                  

O: 27JUN2018 06:55:56   0.6N  126.3E mb=4.7  EMSC   MOLUCCA SEA                  

P: 22JUN2018 117643     1.0N  126.0E 4.0-5.6 BAAAA  Mindanao, Philippines      

P: 26JUN2018 117643     0.0N  125.0E 4.0-5.5 AAAAA  Mindanao, Philippines      

 

A strong eruption of Kilauea occurred today with associated magnitude of M 5.3. NEIC reported it was felt with intensity IV in Hawaii National Park, Volcano and II-III in Hilo, Papaikou, Pepeekeo, Kaunakakai, Kaneohe, Hawaii.

 

O: 28JUN2018 01:50:31  19.4N  155.3W MD=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 04:40:58  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 07:07:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 23:09:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 02:37:50  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 03:33:17  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 03:39:00  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 04:39:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 05:43:05  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 06:45:24  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 00:14:20  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 04:01:19  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 05:26:55  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 07:51:00  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 23:42:04  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 01:03:34  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 03:02:20  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 03:59:46  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 05:29:03  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 06:37:43  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 07:12:02  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 07:21:20  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 07:53:34  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 07:57:59  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 21:56:47  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 00:56:20  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 05:26:48  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 05:59:16  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 06:03:26  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 08:11:14  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 05:24:08  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 05:11:10  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 05:54:08  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 23:56:45  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 28JUN2018 04:02:47  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 22:44:16  19.4N  155.3W Ml=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 27JUN2018 08:40:40  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 27JUN2018 117687    18.8N  155.2W 3.0-4.5 AAAAA  Hawaii                     

 

Aftershocks also continued today after the M 5.5 in the Galapagos Islands yesterday. Like Hawaii, this is a major hot spot and may reflect similar seismicity response to changes in the earth as Hawaii. Forecast 117641 expected this activity in the Galapagos around June 27. These epicenters are located at the fifth node (72 degrees) from the January 23 M 8.0 in the Gulf of Alaska and were probably promoted from that source.

 

O: 27JUN2018 15:30:46   0.8S   91.1W ML=3.1  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 27JUN2018 13:27:40   0.8S   91.1W ML=3.2  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 27JUN2018 19:19:33   0.8S   91.1W ML=3.2  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 27JUN2018 11:23:29   0.8S   91.1W ML=3.3  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 28JUN2018 03:54:16   0.8S   91.1W ML=3.6  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 27JUN2018 16:18:54   0.9S   91.1W ML=3.0  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 27JUN2018 16:02:23   0.9S   91.1W ML=3.1  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 27JUN2018 21:12:10   0.9S   91.1W ML=3.7  EMSC   GALAPAGOS ISLANDS, ECUADOR   

P: 27JUN2018 117641     2.0N   91.0W 3.5-5.1 ACAAA  Galapagos Islands          

 

The strongest earthquake in the U.S. outside Hawaii today was an M 4.2 in the aftershock series following the Gulf of Alaska M 8.0 of January 23, 2018. It was not reported felt in this remote area. The last earthquake of M>4.2 within about 100 km of this epicenter was an  M 4.8 on June 17, 2018. Three events of M 4.2 have occurred in the area in the past two months. Forecast 117826 had expected this activity was likely around June 25.

 

O: 27JUN2018 21:35:25  55.5N  149.4W ML=3.0  EMSC   GULF OF ALASKA               

O: 27JUN2018 15:38:52  56.1N  149.2W mb=4.2  EMSC   GULF OF ALASKA               

P: 25JUN2018 117826    55.9N  149.3W 3.5-5.0 AAAAA  Gulf of Alaska             

 

GALAPAGOS REGION SEES SEISMIC SPIKE

 

EARTHQUAKE SUMMARY FOR JUNE 26, 2018

 

The most unusual earthquakes of the day occurred as a series in the Galapagos Islands of Ecuador. The largest of these was M 4.7-5.5 but the events suggested  yet another volcanic eruption could be in the works. Major eruption in  Guatemala, Chile and Hawaii continued. These may, in part, be responsible for the extreme global quiet in earthquakes which began with the eruption of Hawaii nearly two months ago.

 

Most of the activity in the Galapagos Islands occurred within minutes of local solar noon and was probably promoted by high tidal stresses associated with  the full moon as forecast in earlier issues of this summary:

 

"The full moon will arrive at 04:53 UT on June 28, 2018. Longitudes where tidal stresses are greatest with this new moon are near 72W and 108E and include the eastern U.S., the Caribbean and western South America in the west and Southeast Asia Indonesia in the east. While tidal triggering is most likely in these regions with this new moon, it can occur in any area where tides mitigate seismicity." (June 25-26, 2018)

 

Forecast 117641 had expected the Galapagos would be active around June 27. the last event in the Galapagos of M>=5.5 was an M 5.7 nearly 19 years ago on  December 22, 1999. The Galapagos are located at the fifth node (72 degrees) from the great Gulf of Alaska quake of January and may have been promoted from that source.

 

O: 26JUN2018 09:15:36   0.7S   91.0W mb=4.7  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 19:22:12   0.8S   91.1W ML=3.2  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 17:46:23   0.8S   91.1W ML=3.5  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 09:10:24   0.8S   91.1W ML=3.6  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 17:41:44   0.8S   91.1W ML=3.7  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 18:06:29   0.8S   91.1W ML=3.8  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 17:52:47   0.8S   91.1W ML=3.9  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 18:08:07   0.8S   91.1W ML=3.9  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 19:31:41   0.8S   91.1W ML=3.9  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 18:04:33   0.8S   91.1W ML=4.0  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 19:38:02   0.8S   91.1W ML=4.1  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 18:01:30   0.9S   91.2W ML=3.6  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 19:54:14   1.1S   91.0W ML=3.8  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 17:50:13   1.4S   89.9W mb=4.5  EMSC   GALAPAGOS ISLANDS, ECUADOR

O: 26JUN2018 09:15:36   0.7S   91.0W mb=4.7  EMSC   GALAPAGOS ISLANDS, ECUADOR   

O: 26JUN2018 09:15:36   0.7S   91.0W mb=5.5  EMSC   GALAPAGOS ISLANDS, ECUADOR   

P: 27JUN2018 117641     2.0N   91.0W 3.5-5.1 ACAAA  Galapagos Islands          

 

A moderate earthquake also occurred  today as an M 5.2 in the area offshore Oaxaca, Mexico. This continues the strong aftershocks in the region. It occurred within about 10 minutes of local solar noon and may have been promoted by tidal stresses associated with the full moon. The only earthquake within about 100 km of this epicenter with M>=5.2 in the pat eight months was an M 5.5 on April 11, 2018. Forecasts 117681 had expected this activity was likely at the end of June.

 

NEIC reported this earthquake of M 5.2 in Oaxaca, Mexico was felt with intensity IV in Ishuatan, Oaxaca; IV in Antigua Guatemala, Sacatepequez and II-III in the area(s) of Chiapas, and Mexico City, Mexico and in Guatemala in Quezaltenango and Escuintla.

 

O: 26JUN2018 16:26:06  15.5N   94.8W ML=4.1  EMSC   OFFSHORE OAXACA, MEXICO      

O: 26JUN2018 18:02:21  15.8N   93.8W Mw=5.2  EMSC   OFFSHORE CHIAPAS, MEXICO     

P: 25JUN2018 117681    15.0N   95.0W 3.5-5.3 AAAAA  Chiapas, Mexico            

P: 30JUN2018 117681    16.0N   95.0W 3.5-5.3 BAAAA  Chiapas, Mexico            

 

The strongest earthquake in the U.S. or Canada was an M 3.7 in the Unimak Island area of Alaska. This is the strongest earthquake in the Unimak area since an M 4.0 on June 15, 2018. It was not reported felt in the epicentral region. Forecast 117825 had expected this activity around June 25.

 

O: 26JUN2018 06:31:32  53.4N  163.5W ML=3.1  EMSC   UNIMAK ISLAND REGION, ALASKA 

O: 26JUN2018 09:09:15  53.8N  163.4W mb=3.7  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 25JUN2018 117825    53.9N  165.3W 3.5-5.0 AABAA  Fox Islands, Aleutians     

 

A series of moderate earthquakes also occurred in Japan today but none of these exceeded M 4.8. The region will probably see enhanced seismicity with the coming typhoon season.

 

O: 26JUN2018 05:58:40  29.2N  130.4E mb=4.8  EMSC   RYUKYU ISLANDS, JAPAN        

P: 28JUN2018 117710    29.0N  131.0E 4.0-5.4 AAAAA  Kyushu Japan               

 

O: 26JUN2018 08:00:12  34.9N  132.8E mb=4.6  EMSC   WESTERN HONSHU, JAPAN        

P: 26JUN2018 117747    35.0N  136.0E 3.5-5.1 AABAA  No. Honshu, Japan          

 

O: 26JUN2018 10:46:23  35.3N  140.3E Mw=4.3  EMSC   NEAR EAST COAST OF HONSHU, JAP

O: 26JUN2018 19:16:36  35.3N  140.5E mb=4.3  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 24JUN2018 117751    35.0N  141.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

NEIC reported this earthquake of M 4.3 in southeastern Honshu, Japan was felt with intensity II-III in the area(s) of Chiba and Tokyo Prefectures, Japan.

 

O: 26JUN2018 11:03:04  39.4N  142.0E mb=4.8  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 28JUN2018 117751    39.0N  141.0E 4.0-5.7 AAAAA  Off East Coast Honshu      

 

NEIC reported this earthquake of M 4.8 off northeastern Honshu, Japan  was felt with intensity II-III in the area(s) of Iwate, Ibaraki, Chiba, Saitama, Tokyo and Kanagawa Prefectures, Japan. An earlier event of M 4.3 was felt in a similar area today.

 

O: 26JUN2018 08:04:31  42.2N  143.4E mb=4.4  EMSC   HOKKAIDO, JAPAN REGION       

P: 27JUN2018 117784    42.0N  143.0E 3.5-5.6 AAAAA  Hokkaido, Japan            

 

RARE MODERATELY LARQE EARTHQUAKE IN SOUTH SANDWICH ISLANDS

 

EARTHQUAKE SUMMARY FOR JUNE 25, 2018

 

The strongest earthquake in the world today was an M 5.7 in the southern South Sandwich Islands. It was not reported felt in this remote area. This is the strongest earthquake in the southern South Sandwich Islands within about 200 km of this epicenter since an event of M 5.8-5.9 on March 9, 2006 more than 12 years ago. The only other such earthquakes in this area since 1990 occurred on June 15, 1995 (M 5.7) and October 5, 1997 (M 6.3).  This earthquake occurred within minutes of local solar midnight and was probably triggered by tidal stresses which maximize near this hour. Forecast 117899 had expected this earthquake in this area was likely around June 26.

 

O: 26JUN2018 01:48:40  59.5S   29.8W Mw=5.7  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 26JUN2018 117899    59.0S   26.0W 4.0-6.1 AABAA  So. Sandwich Islands       

 

A moderate earthquake of M 5.5 also occurred in Southern Greece today but was

not reported damaging. EMSC reported it was felt with moderate intensity in Greece at Pilos, Petalidi, Drakoneri, Kalamata, Skala and other communities within about 100 km of the epicenter. The last earthquake in this area of M>=5.5 was an M 5.6 on August 29, 2014. The last of significantly larger magnitude was an M 6.4 on October 12, 2013. Forecast 117746 had expected this earthquake was likely in this area around June 27.

 

O: 25JUN2018 05:14:45  36.7N   21.4E Mw=5.5  EMSC   SOUTHERN GREECE              

P: 27JUN2018 117746    36.0N   22.0E 3.0-4.5 AAAAA  No. Greece                 

 

Volcanism remained active throughout much of the world today after 10 days

of high activity. A series of earthquake in Guatemala was probably related to the current eruption of Fuego. In Ecuador a moderate quake may also have been associated with volcanism and moderate seismicity in the Galapagos occurred in association with the full moon.  A moderate eruption of Kilauea today with M 5.2 was felt with intensity V in Hawaii at Volcano and II-III in Hawaii National Park, Mountain View, Hilo, Papaikou, Kaunakakai, Kurtistown and Keaau, A number of smaller earthquakes were felt in the Volcano area of Hawaii today as well.

 

The forecast for tidal-related seismicity had read:

 

"The full moon will arrive at 04:53 UT on June 28, 2018. Longitudes where tidal stresses are greatest with this new moon are near 72W and 108E and include the eastern U.S., the Caribbean and western South America in the west and Southeast Asia Indonesia in the east. While tidal triggering is most likely in these regions with this new moon, it can occur in any areas where tides mitigate seismicity." (June 25, 2018)

 

O: 25JUN2018 21:24:30  19.2N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:54:21  19.2N  155.5W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 12:20:29  19.4N  155.0W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 10:11:32  19.4N  155.3W MD=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 09:39:30  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 11:20:41  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 11:23:32  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 12:39:33  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 14:18:28  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 15:07:33  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 16:05:42  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 17:19:48  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 17:26:31  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 19:46:16  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 21:04:04  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 21:26:53  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 21:44:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 22:25:31  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 22:57:02  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:08:06  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:28:38  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:47:04  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:47:04  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:50:51  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:17:04  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:19:58  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:23:06  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 01:05:29  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:27:03  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:36:32  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:57:24  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 14:33:06  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 14:35:53  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 16:29:30  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 22:11:24  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 22:46:54  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 23:02:35  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:03:11  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:32:25  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 17:21:25  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 18:25:59  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 18:45:36  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 19:32:37  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 19:33:42  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:23:49  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:25:03  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 01:12:34  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 12:47:01  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 13:00:16  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 16:10:18  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 18:16:31  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:28:17  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:39:01  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 16:08:41  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 17:16:25  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 18:18:39  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:48:26  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:53:58  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 17:23:41  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 21:55:25  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:14:22  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:30:01  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 02:52:21  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 00:31:27  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 09:18:49  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 25JUN2018 22:58:04  19.4N  155.3W Ml=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 26JUN2018 03:02:44  19.4N  155.3W Mw=5.2  EMSC   ISLAND OF HAWAII, HAWAII     

O: 25JUN2018 19:42:07  19.4N  155.3W mb=4.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 24JUN2018 117687    19.3N  155.3W 3.0-4.6 AAAAA  Hawaii                     

 

TIDES CONTINUE TO TRIGGER MAJOR KILAUEA ERUPTIONS

 

EARTHQUAKE SUMMARY FOR JUNE 15, 2018

 

A volcanic earthquake of M 5.3 occurred at Kilauea, Hawaii today. This event occurred within a few minutes of local solar noon and was probably triggered by tidal stresses which maximize at this hour. This summary had noted this likelihood in the previous issue as:

 

 

"Another M 5.3 eruption of Kilauea occurred today in Hawaii. NEIC reported it was felt with intensity V in Volcano and II-III in Hilo, Papaikou, Kaunakakai, Hawaii. Like the M 5.3 yesterday in Hawaii this earthquake occurred a few minutes after 13:00 UT (about 2-3 am local solar time). The events of M 5.3 on June 12 at 11:52 UT and M 5.3 on June 10 at 10:51 UT occurred an hour earlier at 11:52 UT and likewise could have been tidally triggered. The event on June 10 occurred within minutes of local solar midnight. Three of the other events in the eruption of M>=5.3 have occurred new local solar noon, another time when tidal stresses are maximized (see June 4, June 1 and May 4, 2018). All were possibly promoted by high astronomical tidal stresses which maximize near this time." (June 14-15, 2018)

 

Today's eruption of M 5.3 was reported with intensity V in Volcano, Hawaii and II-III in Kurtistown, Papaikou, Naalehu, Kaunakakai and Honolulu, Hawaii.

Many events of M>=2.5 were also felt during the eruption of Kilauea today.

More than 40 events of M>=3 were located in the area of Hawaii today.

 

O: 15JUN2018 17:05:17  19.4N  155.3W MD=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 09:19:16  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 10:56:49  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 09:28:27  19.6N  155.5W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

O: 15JUN2018 13:07:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 16:20:21  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 16:22:18  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 16:31:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 19:27:41  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 19:51:52  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 11:58:52  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 12:05:34  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 12:14:22  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 12:16:09  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 12:24:15  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 13:47:09  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 14:08:56  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 14:46:41  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 18:42:06  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 06:55:42  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 10:16:20  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 10:50:29  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 12:00:22  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 15:12:51  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 15:18:19  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 16:29:17  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 16:35:05  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 19:52:57  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 20:48:15  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 06:59:57  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 09:04:34  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 16:36:22  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 17:09:50  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 20:28:26  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 13:50:24  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 14:21:56  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 12:03:11  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 15:03:24  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 07:29:36  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 15:15:33  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 17:07:21  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 09:02:18  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 20:51:37  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 21:56:39  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 17JUN2018 117444    19.3N  155.2W 3.0-4.6 AAAAA  Hawaii                     

 

Outside Hawaii, seismicity in the U.S. and Canada was returning to active conditions today. Earthquakes of M>=4 occurred in the region of British Colombia, Canada (M 4.4); in Oklahoma (M 4.0); the Alaska Peninsula (M 4.6) and in the Fox Islands, Alaska (M 4.1, 4.1). None of these were reported felt in these remote areas. The most unusual of these was an M 4.4 off western Canada near Masset, B.C. The last event of M>4.4 in this area was an M 5.9 on January 31, 2013.  Forecast 117568 had expected this earthquake was likely within about 100 km of this epicenter around June 13. 

 

O: 15JUN2018 10:09:27  53.6N  134.3W ML=4.4  NRCA  147 km W   of Masset          

P: 13JUN2018 117568    53.0N  133.0W 3.0-5.0 AAAAA  British Colombia           

 

O: 16JUN2018 03:05:53  51.9N  169.6W mb=4.1  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 20JUN2018 117570    52.5N  169.2W 3.5-5.1 BAAAA  Fox Islands, Aleutians     

 

O: 15JUN2018 14:48:37  52.2N  171.2W ML=4.1  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 20JUN2018 117567    52.3N  171.3W 3.5-5.1 BAAAA  Andreanoff Isls, Aleutians 

 

The earthquake of M 4.6 in the Alaska Peninsula was the strongest within about 100 km of that epicenter since an M 4.6 on December 16. 2016. Forecast 117564 had expected today's activity south of this in the Alaska Peninsula around June 17.

 

O: 16JUN2018 02:52:03  56.3N  156.8W mb=4.6  EMSC   ALASKA PENINSULA             

P: 17JUN2018 117564    54.7N  156.9W 3.5-5.0 ABAAA  Alaska Peninsula           

 

NEIC reported an M 4.0 in Oklahoma was felt with intensity VI in Crescent, Oklahoma; V in Hennessey, Enid, Kingfisher and Oklahoma City and IV in Guthrie, Dover with lesser shaking in Edmond, Coyle, and within about 200 km of the epicenter in Oklahoma and Kansas. Forecast 117524 had expected this event was possible around June 17.

 

O: 15JUN2018 20:56:08  36.1N   97.6W Mw=4.0  EMSC   OKLAHOMA                     

O: 15JUN2018 21:09:59  36.1N   97.6W mb=2.7  EMSC   OKLAHOMA                      

P: 17JUN2018 117524    37.0N   97.0W 2.0-4.0 AAAAA  Southern Plains            

 

The strongest earthquake in the world today was an M 5.6 in Samoa. NEIC reported it was felt with intensity IV in Apia, Samoa and II-III in Samoa at Sili, Savaii, Saleilua and American Samoa. The last earthquake within about 200 km of this epicenter with M>=5.6 occurred on June 2, 2018, also with M 5.6. Prior to that an M 6.0 occurred on November 20, 2017 at shallow depth. Forecast 117599 had expected this earthquake in this area was likely around June 12.

 

O: 15JUN2018 13:18:53  15.4S  173.0W mb=5.6  EMSC   TONGA                        

P: 12JUN2018 117599    15.0S  175.0W 4.0-5.4 BABAA  Samoa Islands              

 

A moderate earthquake shook most of Taiwan today with M 5.2.  CWB reported the M 4.4 was felt with intensity II in Yilan County, Taiwan. The M 5.2 was felt with intensity IV in Yilan; III in Taipei, Hualien, Taoyuan Taichung; II in Hsinchu, Nantou, Miaoli, and I in Changhua, Chiayi, and Tainan Counties, Taiwan. This event may have been triggered by Tropical Storm Gaemi which had its eye over the epicenter at the time of the earthquake. The last earthquake in Taiwan with M>=5.2 occurred in February, 2018 as an aftershock of the M 6.1 and 6.4 of February 6 and 4, 2018.

 

"TS Gaemi (08W) continued today in the area east of Taiwan with winds up to 45 kts. It is expected to track along the same path as TS 07W affecting areas of the Ryukyu Islands seismicity in the next several days. An M 5.2 earthquake in Taiwan today was probably  triggered by stresses from this storm." (June 15, 2018)

 

Forecast 117473 had expected this earthquake was likely in Taiwan around June 14.

 

O: 15JUN2018 20:53:55  24.7N  121.8E ML=5.2  EMSC   TAIWAN                       

P: 14JUN2018 117473    24.0N  123.0E 4.0-5.5 AAAAA  Taiwan                     

 

Many of the readers of this summary are aware that it is commonly off-line from the middle to end of June. This is typically a quiet period in global seismicity and especially this year with the Hawaii eruption restraining the build up of seismic energy at specific sites. This is again the case this year. Summaries will not be available through the end of June, 2018. Check back with us around  June 27. For completeness, as in the past, daily summaries during the meantime will be produced for the missing period when the daily summaries resume. This typically means two or three summaries per day until the backlog is complete. In the meantime, enjoy the seismic quiet and join us again in about two weeks. Thank you for reading and your interest in seismology.

 

VOLCANIC EARTHQUAKES IN ICELAND AND HAWAII

 

EARTHQUAKE SUMMARY FOR JUNE 14, 2018

 

Another M 5.3 eruption of Kilauea occurred today in Hawaii. NEIC reported it was felt with intensity V in Volcano and II-III in Hilo, Papaikou, Kaunakakai, Hawaii. Like the M 5.3 yesterday in Hawaii this earthquake occurred a few minutes after 13:00 UT (about 2-3 am local solar time). The events of M 5.3 on June 12 at 11:52 UT and M 5.3 on June 10 at 10:51 UT occurred an hour earlier at 11:52 UT and likewise could have been tidally triggered. The event on June 10 occurred within minutes of local solar midnight. Three of the other events in the eruption of M>=5.3 have occurred new local solar noon, another time when tidal stresses are maximized (see June 4, June 1 and May 4, 2018). All were possibly promoted by high astronomical tidal stresses which maximize near this time. A number of light earthquakes of M3-4.0 were also lightly felt in Hawaii today.

 

O: 14JUN2018 17:05:16  18.8N  155.2W ML=3.0  EMSC   HAWAII REGION, HAWAII

O: 14JUN2018 09:16:52  19.3N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 04:56:20  19.3N  155.1W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 10:10:08  19.3N  155.2W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 05:34:54  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 09:08:56  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 06:59:53  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 03:52:12  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 06:55:42  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 10:34:45  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 11:54:32  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 10:27:58  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 15JUN2018 07:29:36  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 11:33:57  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 13:19:37  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

The other major volcanic oceanic hotspot in the world was also active today. This activity in Iceland began with an M 4.0 within about 5 minutes of local solar noon. This suggests this activity was triggered by strong tidal stresses which maximize at this time. The strongest event in the series was and M 4.7 about an hour later. Earthquakes in this area of Iceland occurred with M 4.6 on October 26 and 27, 2017 and on January 30, 2018 but the only events in the past year of M>=4.7 in Iceland occurred about 200 km north of this on February 19, 2018 and March 15, 2018 with M 5.0 and 4.8 respectively.

 

O: 14JUN2018 13:25:51  64.7N   17.4W ML=3.3  EMSC   ICELAND

O: 14JUN2018 13:14:01  64.7N   17.4W ML=4.0  EMSC   ICELAND

O: 14JUN2018 13:36:03  64.7N   17.5W ML=3.1  EMSC   ICELAND

O: 14JUN2018 15:04:53  64.6N   17.8W mb=4.7  EMSC   ICELAND                      

 

The strongest earthquake in the world today was an M 5.6 in the area north

of the coast of Papua New Guinea. The last earthquake of M>=5.6 within about 200 km of this epicenter was an M 5.6 on April 23 and again on April 26, 2018. While a similar event of M 5.6 also occurred in the area on September 24, 2016, the last of larger magnitude was an M 5.9 on September 17, 2016, probably an aftershock of an M 7.0 on April 6, 2013. As this area is at 103 degrees from Los Angeles, California strong activity here could help trigger a moderate event in southern California, so this summary keeps an eye on this region.  Forecast 117434 had expected this activity was likely around June 13-18.

 

 

O: 15JUN2018 00:57:12   1.9S  138.8E mb=5.6  EMSC   NEAR N COAST OF PAPUA, INDONES

P: 13JUN2018 117434     3.0S  136.0E 4.0-5.8 ABCAA  West Irian, PNG            

P: 18JUN2018 117434     5.0S  138.0E 4.0-5.4 BCAAA  West Irian, PNG            

 

A light earthquake of M 2.5 did occur in the Malibu region of California today. This area in western Los Angeles is an area where precursory activity to a strong valley earthquake may occur. The area is due for a strong 22-year cycle quake and these usually begin several days prior south of western Los Angeles. An M 2.6 hit the region on June 9 with a second shallow quake of M 2.5 laster on that date. The last before that within about 50 km of this epicenter was an M 2.5 on March 6, 2018 and an M 2.7 on January 21, 2018. Forecast 117514 had expected activity in this area in mid-June.

 

NEIC reported this earthquake of M 2.5 in Malibu, Southern California was felt with intensity II-III in the area(s) of Malibu, Westlake Village, Newbury Park, Thousand Oaks and Los Angeles, California.

 

O: 14JUN2018 11:31:39  34.0N  118.9W ml=2.5  ANSS   WNW of Malibu CA              

P: 16JUN2018 117514    34.3N  118.5W 2.5-4.7 AAAAA  So. California             

 

MODERATE QUAKES SHAKE PANAMA AND SO. CHILE

 

EARTHQUAKE SUMMARY FOR JUNE 13, 2018

 

A moderate earthquake of M 5.3 occurred today south of Panama. NEIC reported it was felt with intensity V in Chitre, Herrera, Panama and IV in Panama at Pedasi, Los Santos, Rio Hato, Cocle. Lesser shaking in Panama was reported from Tonosi, Llano de Piedra, Las Minas, Las Tablas, Pese, Penonome, El Cope, Santa Fe, Las Colinas, San Carlos, Nueva Gorgona, Puerto Caimito, Taboga, Cerro Cama, San Vicente de Bique, Arraijan, Balboa, Ancon, Panama City and San Miguelito, Panama. The last quakes of stronger magnitude within about 150 km of this epicenter occurred as a pair of M 5.7 events on January 27 and 31, 2018 and prior to that as an M 6.5 on May 13, 2014. Forecast 117406 had expected today's activity around June 15. This event may have been promoted from the Gulf of Alaska M 8.0 of January 23 and Hawaii as it lies at the fifth node (72 degrees) from both these events.

 

O: 13JUN2018 23:54:44   7.4N   80.6W Mw=5.3  EMSC   PANAMA                        

P: 15JUN2018 117406     8.0N   82.0W 3.5-5.4 AABAA  Costa Rica                 

 

The strongest earthquake in the world today also occurred in the America's - as an M 5.6 in Southern Chile near Aisen. This is a remote area and this event was not initially reported felt in the region. The last event of M>=5.6 within  about 200 km of today's epicenter occurred on March 2, 2014 with M 5.6. An M 6.1, the last of larger magnitude occurred on November 14, 2012. Forecast 117624 had expected this activity to the northwest on the Chile Rise was likely around June 15. This epicenter is near 100 degrees from Hawaii and may have been promoted from that source.

 

O: 14JUN2018 06:27:37  45.9S   76.3W Mw=5.6  EMSC   OFF COAST OF AISEN, CHILE    

P: 15JUN2018 117624    43.0S   83.0W 4.0-5.6 ACCAA  Chile Rise                 

 

As has occurred nearly every day during June, 2018, the strongest seismicity in the U.S. or Canada continued with a moderate M 5.3 associated with the eruption of Kilauea in Hawaii. This event was reported felt with intensity IV in Hawaii at Volcano, and Papaikou with lesser shaking in Kurtistown and Kamuela and other communities within about 75 km of the epicenter. Other light earthquake of M>=3 were also light felt in the area of Kilauea and Volcano, Hawaii.

 

O: 14JUN2018 00:28:07  19.3N  155.2W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 12:16:48  19.4N  155.3W MD=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 09:02:55  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 06:35:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 09:18:54  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 11:31:41  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 06:39:04  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 09:51:18  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 06:40:05  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 22:43:53  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 08:02:30  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 09:06:36  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 09:09:53  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 05:10:31  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 08:08:38  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 05:33:17  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 14JUN2018 05:40:36  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 12:15:48  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 13:39:37  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

Two moderate earthquakes of M 4.1 and 4.6 hit in the area of Tokyo, Japan. These are not unusual but may be a warning of a stronger upcoming event in the area. NEIC reported this earthquake of M 4.6 in Honshu, Japan was felt with intensity II-III in the area(s) of Chiba, Tokyo, Saitama, Kanagawa, Saitama, Prefectures, Japan.  Many of the events in this area occur as strong weather systems move near these epicenters. Stronger typhoons will be coming in the next several months and could trigger a strong to major quake in the area. In the current case, Tropical Storm Maliksi was near these epicenters at the time of the earthquakes and may have helped promote the current activity in the area. This summary as noted this storm in previous issues:

 

"Tropical Storm Maliksi (06W) continued today east of Honshu, Japan with winds up to 55 kts. It is expected to track to the north and not to make landfall. Some increases in seismicity in the Taiwan and the Ryukyu Islands may accompany this storm." (June 11-12, 2018)

 

Forecast 117503 expected this activity was likely around June 14.

 

O: 13JUN2018 22:14:31  35.6N  140.2E mb=4.6  EMSC   NEAR EAST COAST OF HONSHU, JAP

O: 13JUN2018 11:19:37  36.1N  140.7E mb=4.1  EMSC   NEAR EAST COAST OF HONSHU, JAP

P: 14JUN2018 117503    35.0N  141.0E 4.0-5.4 AAAAA  Off East Coast Honshu      

 

ANTIPODAL QUAKES IN SUMATRA; COLOMBIA

 

EARTHQUAKE SUMMARY FOR JUNE 12, 2018

 

A pair of antipodal earthquakes began today in Colombia with M 4.9 and completed as the strongest earthquake of the day - an M 6.0 in Sumatra, Indonesia. The last earthquake in the world, and the only such event in the world of

M>=6 was an M 6.2 on May 18, 2018. The strongest event in the world in the past two months was the M 6.9 quake at Kilauea, Hawaii on May 4. Other than that no earthquakes of M>6.2 have occurred in the past two months in the world. The most active period was the three days following the M 6.9 in Hawaii of May 5-9 when three of the four events of M 6.0-6.2 in the past two months occurred in  Hindu Kush, New Britain and the central Philippines. This quiet began with the eruption of Kilauea and has been a deep quiet. Normally an earthquake of M>=6 occurs in the world about once every other day.

 

Antipodal earthquakes are not uncommon in Sumatra and Colombia and many examples such as today's can be cited. Energy from a major event can concentrate near the antipode because of geometric concentration due to the near-spherical shape of the earth and internal boundaries. Other effects which lead to antipodal events include tidal, geomagnetic, solar, weather and other external stresses which affect the entire earth.

 

The earthquake in Colombia was at a somewhat unusual epicenter in the south and north of Ecuador which has been active in the past several years. The last  earthquake within about 150 km of this epicenter was an M 5.6 on October 20, 2014.  The strongest earthquake in southern Colombia in the past three years was an M 5.2 on March 24, 2017 about 350 km northwest of today's epicenter. Forecast 117405 had expected this event within about 100 km of the epicenter was likely around June 12.  NEIC reported this earthquake of M 4.9 in Southern Colombia was felt with intensity VII in Pasto, Narino, Colombia; V in Chachagui and II-III in the area(s) of Puerres, Narino, Colombia. Antipodal activity in Sumatra is possible in the next several days. Forecast 117405 had expected today's event within about 100 km of the epicenter was likely around June 12.

 

O: 12JUN2018 09:35:25   1.1N   77.3W Mw=4.9  EMSC   COLOMBIA                     

P: 12JUN2018 117405     1.0N   78.0W 4.0-5.4 AAAAA  Colombia                   

 

The earthquake of M 6.0 in the Sumatra area of Indonesia may have been promoted by strong tidal stresses associated with the new moon. The strongest aftershock was an M 5.4 which occurred within a few minutes of local solar midnight with the new moon, a time when tidal stresses area maximized. Earthquakes within about 200 km of today's epicenter with M>=6 last occurred on August 31, 2017 (M 6.3); March 3, 2015 (M 6.1) and December 23, 2009 (M 6.0). A major quake of M 7.5 hit northeast of this on September 30, 2009.  Forecasts 117191 and 117412 had expected today's event was likely around June 9-17. It is likely this activity was promoted from Hawaii and from the M 8.0 in the Gulf of Alaska of January 23, 2018. Both are 103-106 degrees from this Sumatra epicenter. Seismic energy concentrated at the surface at this distance from major surface events and can help promote further seismicity in this distance zone.

 

O: 12JUN2018 23:46:12   1.9S   98.7E Mw=5.1  EMSC   KEP. MENTAWAI REGION, INDONESIA

O: 13JUN2018 02:07:57   1.9S   98.7E Mw=5.2  EMSC   KEP. MENTAWAI REGION, INDONESIA

O: 13JUN2018 06:59:01   1.9S   98.7E Mw=5.4  EMSC   KEP. MENTAWAI REGION, INDONESIA

O: 12JUN2018 23:08:28   2.0S   98.7E Mw=6.0  EMSC   SOUTHWEST OF SUMATRA, INDONESI

P: 09JUN2018 117191     2.0S  101.0E 4.0-5.5 BAAAA  So. of Sumatra             

P: 17JUN2018 117412     2.0N   98.0E 4.0-5.8 BCAAA  So. Sumatera               

 

The active eruption of Kilauea continued today in Hawaii. The largest earthquake in the U.S. occurred in association with this eruption. This M 5.3 was widely  felt including with intensity V in Volcano and with lesser shaking in Hawaii at Kurtistown and Keaau, Hawaii among others. A number of lesser magnitude earthquakes were also felt lightly in Hawaii today.

 

O: 13JUN2018 03:28:06  19.3N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 06:00:49  19.4N  155.0W ML=3.4  EMSC   HAWAII REGION, HAWAII

O: 12JUN2018 08:08:17  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 08:23:47  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 08:40:59  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 08:02:30  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 08:14:13  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 20:27:00  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 11:46:49  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 05:04:55  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 11:47:55  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 05:03:03  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 05:36:13  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 05:33:48  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 06:54:18  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 08:53:47  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 10:05:02  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 13JUN2018 08:08:38  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 08:42:45  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 11:51:26  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 10:01:17  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 10:33:06  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 12:31:30  19.4N  155.3W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 11:52:51  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

MODERATE QUAKE SHAKES KYUSHU, JAPAN

 

EARTHQUAKE SUMMARY FOR JUNE 11, 2018

 

The strongest earthquake in the world today was an M 5.4 in Kyushu, Japan. NEIC reported it was felt with intensity IV in Miyazaki and II-III in Kagoshima, Kumamoto, Fukuoka, and Hiroshima Prefectures, Japan. The last earthquake in the region of Kyushu with M>=5.4 was an M 5.5 on December 20, 2017, the only such event in the area in the past half year. This may have been promoted by TS Maliksi as it occurred near the eye of that storm and had been expected as possible associated seismicity with Maliksi in previous summaries:

 

"Tropical Storm Maliksi (06W) continued today east of the Ryukyu Islands with winds up to 75 kts. It is expected to track to the north and not to make landfall. Some increases in seismicity in the Taiwan and the Ryukyu Islands may accompany this storm." (June 9-10, 2018)

 

Forecast 117266 had expected this event within about 100 km of the epicenter was likely around June 9.

 

O: 11JUN2018 19:54:22  31.3N  131.3E Mw=5.4  EMSC   KYUSHU, JAPAN                

P:  9JUN2018 117266    31.0N  130.0E 3.5-5.1 AAAAA  Kyushu, Japan area         

 

An M 2.8 in the San Francisco, California Bay area today was widely felt in the region. NEIC reported it was felt with intensity II-III in California at Cupertino, Los Altos, La Honda, Saratoga, Mountain View, Sunnyvale, San Jose, Palo Alto, Stanford, San Francisco and in general within about 40 km of the epicenter. This event was probably promoted by tidal stresses associated with the upcoming new moon as noted in previous issues of this summary:

 

"The new moon will arrive at 19:43 UT on June 13, 2018. Longitudes where tidal stresses will be greatest with this new moon are near 115W and 65E and include the western U.S. and Mexico in the west and central Asia and the Indian Ocean in the east. While tidal triggering is most likely in these region with this new moon, it can occur in any areas where tides mitigate seismicity." (June 9-11, 2018)

 

The last earthquake within about 50 km of this epicenter in the San Francisco Bay area with M>=2.8 occurred on May 29, 2018 as an M 3.0 with the last new moon and prior to that an M 3.2 on May 16 with the previous full moon.  Forecast 117257 had expected this activity was likely around June 9.

 

O: 11JUN2018 18:14:41  37.3N  122.1W MD=2.8  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P:  9JUN2018 117257    37.3N  121.6W 2.5-4.5 AAAAA  Central California         

 

Moderately large earthquakes continued today in Hawaii with the largest an M 5.3. This event was felt widely on the island of Hawaii. At least 18 events of M>=3 were recorded in Hawaii today, many of which were reported felt lightly in the areas of Volcano, Pahoa and Hawaii National Park among others.

 

O: 11JUN2018 09:04:48  19.4N  155.3W MD=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 06:50:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 10:24:13  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 10:53:20  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 12:42:02  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 13:54:31  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 13:21:44  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 05:25:15  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 06:53:05  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 07:53:23  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 10:50:51  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 12JUN2018 06:54:19  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 08:53:49  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 10:25:21  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 10:45:48  19.4N  155.3W ML=4.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 14:43:54  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

 

The strongest earthquake in the U.S. or Canada outside Hawaii today was an M 4.9 in the Alaska Peninsula. The last earthquake of M>=3.9 within about 100 km of this epicenter in the Alaska Peninsula occurred November 17, 2017 with M 3.9.  Forecast 117336 expected this unfelt event was likely in this area in early to mid-June.

 

 

O: 11JUN2018 16:28:00  56.6N  157.5W Ml=3.9  EMSC   ALASKA PENINSULA             

P:  5JUN2018 117336    56.8N  158.7W 3.5-5.2 CAAAA  Alaska Peninsula           

 

LIGHT EARTHQUAKE ON NORTH CAROLINA-VIRGINIA BORDER WIDELY FELT

 

EARTHQUAKE SUMMARY FOR JUNE 10, 2018

 

An unusual earthquake of M 2.6 along the Virginia-North Carolina Border was widely felt in the epicentral region today.  NEIC reported this earthquake of M 2.6 in North Carolina was felt with intensity V in Purleat, NC and IV in McGrady, NC and II-III in the area(s) of North Carolina at Hays, Roaring River, Traphill, Wilkesboro, Millers Creek, North Wilkesboro, State Road, Laurel Springs, Blowing Rock, Hickory, Winston Salem, Lexington, Thomasville, Rocky Mount; in Virginia Beach, and Marion, Virginia and in Rogersville, Tennessee and Barbourville, Kentucky.  The last earthquake within about 100 km of this epicenter with M>=2.6 occurred December 15, 2014 with M 3.0. Forecast 117265 had expected today's event was likely around June 7.

 

O: 10JUN2018 23:56:36  36.3N   81.1W MD=2.6  EMSC   VIRGINIA-N CAROLINA BORDER REG

P:  7JUN2018 117265    37.0N   83.0W 2.0-3.9 BABAA  Kentucky/Tennessee/NC      

 

The strongest seismicity in the world today continued in the Kilauea eruption in Hawaii. The largest eruptions today were associated with earthquakes of M 5.2 and 5.3 continuing the level of the eruption as seen in previous days. These and many smaller earthquakes were reported felt lightly in Volcano, Hawaii National Park, Pahoa, Hilo and many other localities of Hawaii.

 

O: 10JUN2018 21:23:47  18.9N  155.8W ML=3.2  EMSC   HAWAII REGION, HAWAII

O: 11JUN2018 00:06:41  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 04:08:46  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 06:50:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 07:06:27  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 07:53:23  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 03:23:05  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 23:33:27  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 05:10:00  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 09:04:48  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 09:05:56  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 00:40:16  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 22:37:51  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 11JUN2018 08:53:49  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 10:42:56  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 10:51:02  19.4N  155.3W mw=5.3  ANSS   Volcano Hawaii volcanic

O: 10JUN2018 10:51:02  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

The following is an edited portion of a first-hand account of the eruption of Volcan da Fuego near Guatemala City from an associate:

 

"Last Sunday just after noon it got very dark outside, like it was early evening and it was going to pour rain.  What had happened was that the volcano erupted and there were huge black clouds of sand and ash.  You have probably seen pictures on T.V. 

 

Here in Guatemala City we did get some sand and ash that fell.  At our house we  had very little, but hereon the big cement patio there was a thin blanket of  black sand that was swept up.  Also the workers went up on the flat roof buildings  to sweep up the sand so when it rained it would not go down the drains.  Tuesday the volcano blew off again with more devastation and loss of life. 

 

... a feeding center for children near Antigua where we help out and take visiting groups.  They got sand, ash and some rocks that fell, but they OK and are busy helping others in need.  They are involved in gathering food and clothing from their town and taking it to the people in Acatenango, a nearby town towards the coast that was affected. 

 

The highway that goes to Escuintla, a coastal city at the base of the volcano, was closed for a while for precaution in case more hot material should come down the side of the volcano.  There was panic in Escuintla as people were trying to leave the area.  Part of the problem is not knowing what will happen if the volcano goes off again.  Things are a bit more calm now, but there is still an element of uncertainty." (June 10, 2018)

 

The strongest activity in the U.S. or Canada today occurred in the Unimak and Andreanof Islands of the Aleutians, Alaska. These two events of M 4.0 each were not reported felt in these remote regions. The Unimak area was active in late May with a number of events of M>=4 while an M 4.2 occurred in the Andreanof Islands within about 100 km of today's epicenter on June 5. Forecasts 117339 and 117352 had expected this activity in Alaska around June 10-11.

 

O: 10JUN2018 15:50:29  51.5N  173.9W mb=4.0  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 11JUN2018 117339    52.2N  171.5W 3.5-5.0 AABAA  Andreanoff Isls, Aleutians 

 

O: 11JUN2018 00:56:27  54.7N  163.4W ML=4.0  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 10JUN2018 117352    54.6N  161.7W 3.5-4.9 AAAAA  Unimak Islands, Aleutians  

 

An earthquake of M 5.0 in the Bonin Islands, Japan today may have been triggered by the passage of a Tropical Storm over the epicenter. The eye of TS Maliksi was over this epicenter when this earthquake occurred at local solar midnight and together with tidal stresses associated with the new moon may have promoted this event at this time. Forecast 117237 had expected this activity around June 10.

 

"Tropical Storm Maliksi (06W) continued today east of Honshu, Japan with winds up to 55 kts. It is expected to track to the north and not to make landfall. Some increases in seismicity in the Taiwan and the Ryukyu Islands may accompany this storm. The main effect of this storm on seismicity, however, is likely to be to reduce seismicity in the region of Japan for the next week." (June 10, 2018)

 

O: 10JUN2018 14:55:19  27.3N  143.4E mb=5.0  EMSC   BONIN ISLANDS, JAPAN REGION  

P: 10JUN2018 117237    29.0N  142.0E 4.0-5.5 ABAAA  Bonin Islands              

 

MODERATE QUAKES SHAKE CENTRAL U.S.; ENGLAND

 

EARTHQUAKE SUMMARY FOR JUNE 9, 2018

 

Moderate earthquakes hit Oklahoma, Hawaii and England today with M 4.4, 5.2 and 4.0. The moderate earthquake of M 4.4 near Cherokee, Oklahoma today was widely felt in that State. NEIC reported maximum intensity VI in Pond Creek and Burlington, Meno, Oklahoma with V in Nash, Wakita, Cherokee, Waldron, Lahoma, Oklahoma. Intensity IV was felt as far as 200 km from the epicenter in Oklahoma and Kansas. The quake was also reported felt 400 km from the epicenter in Missouri, Texas, Nebraska, Texas, Minnesota, Illinois, Wisconsin, Utah, and Michigan.   Stronger earthquakes in Oklahoma often occur near the new or full moons and  may be promoted by tidal forces and their action on ground waters in Oklahoma and Kansas. These often occur near local solar noon or midnight when local tidal stresses maximize. The new moon is coming up in three days as noted in this summary:

 

"The new moon will arrive at 19:43 UT on June 13, 2018. Longitudes where tidal stresses will be greatest with this new moon are near 115W and 65E and include the western U.S. and Mexico in the west and central Asia and the Indian Ocean in the east. While tidal triggering is most likely in these region with this new moon, it can occur in any area where tides mitigate seismicity." (June 9-10, 2018)

 

The last earthquake in Oklahoma within about 200 km of this epicenter with M>=4.5 was an M 4.5 on April 7 and again on April 9, 2018 about 100 km southeast of today's epicenter. The last of larger size in Oklahoma occurred November 7, 2016 with M 5.0. The last within about 100 km of today's epicenter was an M 5.1 on February 13, 2016. Forecast 117296 had expected this activity was likely around June 7. This earthquake is located at 52 degrees from Hawaii, node 7, where strong promotion is expected following major activity on the surface.

 

O:  9JUN2018 13:59:41  36.7N   98.1W mb=4.5  EMSC   OKLAHOMA                     

P:  7JUN2018 117296    38.0N   98.0W 2.0-4.1 ABAAA  Southern Plains            

 

The earthquake in England of M 4.0 was also widely felt and heard with a loud earthquake noise. It appears to be part of the activation of the Atlantic region which this summary has followed over the past several days. EMSC reported light to moderate shaking in the United Kingdom at Grimsby, Great Coates, Healing, Stallingborough, Immingham, Internsea, Burstwick, Waltham, Keelby, Hedon, Tetney, North Thoresby, Marchchapel, Hull, North Somercotes, Hessle, Willerby, Cottingham, Long Riston, Kirk Ella, Willerby, Louth, Hornsea, Swanland, North Ferriby, Tickton, Market Rasen, Beverley, Little Weighton, Walkington, Brough, Elloughton, South Cave, Scunthorpe, Watton, Newport, Driffield, Market Weighton, Sudbrooke, Lincoln, Cherry Willingham, Holme-on-Spalding-Moor, Roughton Moor, Pocklington, Sacilby, Tattershall, Metheringham, Anton's Gowt, Upper Helmsley, Doncaster, Heslington and in general within about 100 km of this epicenter.

The last earthquake in England of M>=4 was an M 4.2 southwest of this on February 17, 2018 and prior to that on February 29, 2014 with M 4.1. The last within about 200 km of today's event was an M 5.3 on February 27, 2008. Forecast 117353 expected a moderate quake in the U.K. was likely around June 8. This epicenter is located at 103 degrees from the Kilauea eruption in Hawaii. As noted in the previous summary this relation was expected:

 

"The most unusual activity in the world during this period has been occurring at distances from Hawaii (nodal and reflective/refractive) suggesting some promotion from that source but it appears likely that the movement in Hawaii is taking up a lot of global stress and preventing large earthquakes from happening elsewhere at this time." (June 8-9, 2018)

 

Seismic energy from strong surficial activity on the earth reflects off the core-mantle boundary is redirected  to the surface near 103 degrees from the  mainshock. Seismicity often increases in this distance range following and may be triggered or promoted from the distant source.

 

 

O:  9JUN2018 22:14:24  53.6N    0.0W ML=4.0  EMSC   ENGLAND, UNITED KINGDOM      

P:  8JUN2018 117353    51.0N    3.0W 3.0-4.6 ACBAA  United Kingdom             

 

The strongest earthquake in the world today again was a moderate quake associated with the volcanic eruption of Kilauea in Hawaii. This event of M 5.2 was reported by NEIC to have been felt with intensity IV in Hawaii at Volcano and II-III in Kurtistown, Hakalau, Holualoa, Honolulu, and Waianae, Hawaii.

 

O: 09JUN2018 15:05:13  19.3N  155.2W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 05:19:04  19.4N  155.3W MD=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 09:37:41  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 10:25:56  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 13:53:54  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 04:23:00  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 13:18:13  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 08:41:15  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 07:12:22  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 10:22:57  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 11:20:32  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 13:55:23  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 07:01:59  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 11:16:24  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 10JUN2018 04:21:43  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 07:37:36  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O:  9JUN2018 10:14:34  19.5N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII     

O:  9JUN2018 14:48:18  19.4N  155.3W Mw=5.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

The eruption of Volcan de Fuego in Guatemala continued with new sediment flows, ash and lava. Mud flows (Lahars) were also an important component of this eruption. Search and rescue efforts have been suspended due to danger from the eruption.  More than 4000 area still in shelters from the eruption with more than 110 killed and 200 still missing.

 

 

HAWAII CONTINUES ACTIVE; GLOBAL SEISMICITY QUIET

 

EARTHQUAKE SUMMARY FOR JUNE 8, 2018

 

Global seismicity remained at quiet levels today. The most unusual earthquake of the day was an M 4.5 aftershock in the Tristan Da Cunha area of the South Atlantic. This is an aftershock of the unprecedent earthquake of M 5.1 in Tristan Da Cunha which occurred yesterday. Neither event was felt. Forecast 117395 had expected this activity was possible around June 11. The Atlantic region has seen elevated seismicity since the full moon and this may continue several additional days. 

 

O:  8JUN2018 12:22:08  39.7S   15.8W mb=4.6  EMSC   TRISTAN DA CUNHA REGION      

P: 11JUN2018 117395    44.0S   16.0W 4.0-5.6 BCAAA  So. Mid-Atlantic Ridge     

 

The strongest earthquake in Hawaii and the world today was an M 5.2. NEIC reported it was felt with intensity II-III in Volcano, Pahoa, Hilo, Kurtistown, Keaau, Kailua Kona, Waikoloa, Hana, Wailuku,  Hawaii. An M 3.9 was widely felt and  was associated with lightly felt earthquakes of M 3.8, 3.7 and 3.6 within minutes. The global quiet in seismicity which began with the eruption of Kilauea more than a month ago also continued. The most unusual activity in the world during this period has been occurring at distances from Hawaii (nodal and reflective/refractive) suggesting some promotion from that source but it appears likely that the movement in Hawaii is taking up a lot of global stress and preventing large earthquakes from happening elsewhere at this time.

 

O: 08JUN2018 22:40:59  19.4N  155.3W MD=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 08:24:41  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 10:09:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 12:41:03  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 00:58:47  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 06:57:49  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 07:14:13  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 20:28:53  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 01:52:50  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 07:12:22  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 19:02:13  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 12:39:52  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 12:42:15  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 12:43:31  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 08:41:15  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 09JUN2018 07:37:36  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O:  8JUN2018 12:44:39  19.4N  155.3W Mw=5.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

An M 3.7 in the lake country of northern California today was widely felt in that area. Outside Hawaii, this was the strongest quake in the U.S. or Canada today. NEIC reported this earthquake of M 3.7 in Northern California was felt with intensity IV in Redwood Valley and II-III in the area(s) of Ukiah, Potter Valley, Willits, Upper Lake, Comptche, Lakeport, Philo, Albion, Hopland and in general within about 50 km of the epicenter. The last earthquake of M>=3.7 in this region of California was an M 4.3 on December 14, 2017 about 60 km northwest of today's epicenter. An M 3.9 hit within about 10 km of today's epicenter on October 13, 2017 after a year of quiet in the region. Forecast 117260 had expected today's activity was likely around June 10.

 

O:  8JUN2018 17:23:52  39.3N  123.2W Mw=3.7  EMSC   NORTHERN CALIFORNIA          

P: 10JUN2018 117260    39.8N  123.5W 2.5-4.4 AAAAA  Central California         

 

A second earthquake of M>=3 in California today occurred east of Los Angeles. NEIC reported this earthquake of M 3.4 in Southern California was felt with intensity IV in Angelus Oaks, Forest Falls and II-III in the area(s) of Yucaipa, Big Bear Lake, Mentone, Big Bear City, Calimesa, Beaumont, Highland, Redlands, Morongo Valley, Lake Arrowhead and San Bernardino, California and in general within about 50 km of the epicenter.  As it occurred near local solar noon it may have been promoted by tidal stresses which maximize at this hour. The last earthquake of M>=3.4 within about 50 km  of this epicenter was an M 4.5 about 25 km east of this a month ago on May 8, 2018. The region appears to be seeing elevated seismicity this year with light earthquakes east of Los Angeles on January 25 and 27 and February 11, 2018. Forecast 117287 had expected activity in this area was likely around June 7.

 

O:  8JUN2018 20:53:48  34.1N  116.9W ML=3.4  EMSC   SOUTHERN CALIFORNIA          

P:  7JUN2018 117287    34.4N  116.5W 2.5-4.5 AAAAA  So. California             

 

UNUSUAL QUAKE IN TRISTAN DA CUNHA AREA

 

EARTHQUAKE SUMMARY FOR JUNE 7, 2018

 

The rarest earthquake in the world today occurred in the South Atlantic Ocean area continuing recent activation of that area which included several moderately large quakes in the South Sandwich Islands and the Atlantic-Indian Ridge. Today's event of M 5.1 occurred in the region of Tristan Da Cunha. The only earthquake in recorded history within about 500 km of today's epicenter with M>=5.1 was an M 5.6 on August 5, 1988. This is a remote area and this earthquake was not reported felt in the area. The last earthquake within about 300 km of today's epicenter with M>=5.1 occurred more than 30 years ago. Forecast 117395 had expected a moderate earthquake in this area around June 11. This epicenter is at 143 degrees from Hawaii, a distance at which seismic promotion occurs from concentrated seismic energy reflected off core boundaries. This energy returns to the surface at this distance and often is associated with rare or strong far-field aftershocks.

 

O:  7JUN2018 08:49:16  41.3S   10.8W mb=5.1  EMSC   TRISTAN DA CUNHA REGION      

P: 11JUN2018 117395    44.0S   16.0W 4.0-5.6 BCCAA  So. Mid-Atlantic Ridge     

 

The strongest event today was an M 5.3 in the Santa Cruz Islands near Vanuatu. It was not reported felt in this remote area. This is the first earthquake in the Santa Cruz Islands of M>=5.3 since an M 5.3 on January 31, 2018, the only  such event in the area in the past three-quarters of a year. Forecast 117370 had expected today's event was likely around June 9 within about 50 km of this epicenter.

 

O:  7JUN2018 16:15:13  10.8S  165.6E mb=5.3  EMSC   SANTA CRUZ ISLANDS           

P:  9JUN2018 117370    11.0S  166.0E 4.0-5.5 AAAAA  Vanuatu Islands            

 

The eruption of Kilauea in Hawaii continued today but no moderately large quakes were recorded. At least 12 events of M>=3 accompanied the eruption today with the largest of M 3.8 being lightly felt in the area of Pahoa and Volcano, Hawaii.

 

O: 07JUN2018 14:14:53  19.2N  155.4W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 04:03:38  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 04:42:21  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 05:21:51  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 06:06:06  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 01:29:21  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 05:23:35  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 01:48:27  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 06:57:49  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 07:14:13  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 08JUN2018 02:45:13  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O:  8JUN2018 02:46:35  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

ATLANTIC EARTHQUAKES CONTINUE AT ELEVATED MAGNITUDES

 

EARTHQUAKE SUMMARY FOR JUNE 6, 2018

 

Moderate quakes continued in the Atlantic today with an M 4.8 in the Central Mid-Atlantic and an M 5.6 in the South Sandwich Islands. The strongest earthquake in the world today was an M 5.6 in the South Sandwich Islands.

The South Sandwich Islands have been active in the past several months with events of M 5.7 on April 9 and M 5.8 on May 14, 2018. Earthquakes in the South Sandwich Islands are seldom felt in the region. Forecast 117399 had expected today's quake was likely within about 50 km of this epicenter around June 8. The geomagnetic storm now concluded and high tidal stresses may have promoted this earthquake.

 

O:  6JUN2018 18:51:35  58.5S   25.7W Mw=5.6  EMSC   SOUTH SANDWICH ISLANDS REGION

P:  8JUN2018 117399    59.0S   26.0W 4.0-5.8 AAAAA  So. Sandwich Islands       

 

O:  6JUN2018 17:42:33   0.9S   21.9W mb=4.8  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P: 10JUN2018 117189     1.0S   20.0W 4.0-6.0 BABAA  Central Mid-Atlantic       

 

An M 5.4 earthquake today was associated with another strong eruption at Kilauea, Hawaii. NEIC reported maximum intensity VI in Hilo and IV in Volcano, Honolulu and Keaau, Hawaii. Lesser intensity shaking occurrred in Mountain View, Kurtistown, Pepeekeo, Captain Cook, Kamuela, Kailua Kona, Waikoloa, Lahaina, Kailua, Kaneohe, Ewa Beach and Wahiawa, Hawaii.

 

O: 06JUN2018 13:38:22  19.4N  155.3W MD=2.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 10:09:45  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 15:44:15  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 17:45:40  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 07JUN2018 00:47:58  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 07JUN2018 01:03:13  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 07JUN2018 01:20:50  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 15:42:07  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 19:10:55  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 21:36:36  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 23:24:38  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 18:48:44  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 20:29:27  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 16:44:09  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 19:12:40  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 07JUN2018 02:12:14  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 07JUN2018 00:25:16  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 19:04:08  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 23:26:30  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 06JUN2018 18:34:28  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 07JUN2018 00:50:17  19.4N  155.3W Md=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O:  7JUN2018 02:06:39  19.4N  155.3W Mw=5.4  EMSC   ISLAND OF HAWAII, HAWAII     

P: 11JUN2018 117240    19.4N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

 

The total number of deaths associated with the eruption of Fuego in Guatemala has now passed 109 with another 200 missing. Search and rescue attempts have been suspended now that 72 hours have passed since the major eruption.

 

MODERATE QUAKE IN AZERBAIJAN WIDELY FELT

 

EARTHQUAKE SUMMARY FOR JUNE 5, 2018

 

The largest earthquake in the world today was a moderate earthquake of M 5.4 in Azerbaijan. NEIC reported it was felt with maximum intensity VII in Mingecevir, Azerbaijan and VI in Zaqatala and Saki. Intensity V was felt in Ullugiyul, Samgori, Dusheti, Georgia and IV was reported at Eliabad, Derbent, Dagestan, Zahesi, Tskneti, Georgia. It was felt with moderate intensity II-III in Armenia at Yerevan and in Russia at Vladikavkaz, Alburikent, Dervent and may other communities within about 200 km of the epicenter.  Similar earthquakes of M 5.3-5.4 hit near Azerbaijan on August 1, 2016 and September 4, 2015. The last of significantly larger magnitude in the area was an M 5.6 on May 7, 2012. Today's event may be an aftershock of that as they occurred within about 10 km of the same epicenter. Forecasts 117303 expected this region was likely to be active west of today's epicenter around June 4.

 

O:  5JUN2018 18:40:28  41.6N   46.9E mb=5.3  EMSC   AZERBAIJAN                   

P:  4JUN2018 117303    43.0N   44.0E 3.5-5.0 ABBAA  Caucasus/Caspian Sea       

P:  4JUN2018 117303    40.0N   44.0E 3.5-5.1 ABBAA  Caucasus/Caspian Sea       

 

Otherwise, global seismic activity today was once again dominated by eruptions in Fuego, Guatemala and Kilauea, Hawaii. The eruption in Guatemala has thus far killed at least 75 people and thousands have been evacuated. Lava, Lahar and ash flows have been common in this two day eruption. In Kilauea, an M 5.5 earthquake near the eruption site was the strongest earthquake not directly associated with a strong eruption since the M 6.9 of May 4, 2018. NEIC reported it was felt with intensity IV in Volcano, Hawaii and I-II in Mountain View, Hilo, Kurtistown and Hakalau, Hawaii. Earthquakes and eruptions of M>=5.4 have been a daily occurrence in Hawaii this week, but this level is unlikely to continue as the geomagnetic storm which may have promoted it is now concluded. Forecast 117217 had expected today's activity around June 4.

 

O: 06JUN2018 05:26:15  19.4N  155.2W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 05JUN2018 08:04:20  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05JUN2018 13:28:23  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 05JUN2018 14:28:46  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 05JUN2018 11:17:21  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 05JUN2018 08:14:42  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 05JUN2018 14:32:27  19.4N  155.3W mw=5.5  ANSS   Volcano Hawaii volcanic

O:  5JUN2018 14:32:27  19.4N  155.3W mw=5.5  EMSC   Volcano Hawaii volcanic      

O:  5JUN2018 11:02:37  19.4N  155.3W Ml=2.1  EMSC   ISLAND OF HAWAII, HAWAII     

P:  4JUN2018 117217    19.3N  155.2W 3.0-4.6 AAAAA  Hawaii                     

 

 

An earthquake in Greenland of M 4.5-5.0 was the strongest within about 200 km of that epicenter in that region in at least 30 years. Forecast 117354 had expected this event was likely within about 10 km of the epicenter around June 5.

 

Earthquakes Canada reported this earthquake of M 5.0 in Greenland was felt with intensity II-III in the area(s) of Greenland at Nuuk and Kangerlussuaq, Sisimiut.

 

O:  4JUN2018 22:49:27  65.0N   52.2W mb=4.5  EMSC   WESTERN GREENLAND             

O:  4JUN2018 22:49:30  64.9N   52.0W ML=5.0  NRCA  West coast of Greenland.      

P:  5JUN2018 117354    65.0N   52.0W 2.5-4.4 AAAAA  Baffin/Davis Strait Canada 

 

An earthquake of M 4.9 also occurred in Svalbard northern Europe today. Like the event in the region of Greenland this event may have been promoted by the end of the current geomagnetic storm. The only event in the region with M>=4.9 in the past three years was an M 5.2 on May 30, 2018. Prior to that an M 5.1 occurred in the area on December 17, 2013 and an M 5.4 on January 11, 2015. Forecast 117124 had expected today's epicenter in Svalbard north of this at the end of May. 

 

O:  5JUN2018 18:08:59  76.6N    7.2E mb=4.9  EMSC   SVALBARD REGION              

P: 30MAY2018 117124    79.0N    7.0E 4.0-5.8 BCAAA  Arctic Ocean Region        

 

An unusual earthquake of M 4.8 was also felt in Southern Greece today. EMSC reported this earthquake of M 4.8 in Southern Greece was felt with intensity II-III in the area(s) of Agia Pelagia, Sparti, Alimos, Palaio Faliro, and Metamorfosi, Greece.  The last earthquake within about 150 km of this epicenter in Southern Greece with M>=4.8 was an M 5.0 on May 16, 2018 about 40 km east of this epicenter. This may be a regional aftershocks of that event. Forecast 117250 had expected this event within this area was likely around June 4.

 

O:  5JUN2018 08:52:40  36.5N   22.6E mb=4.8  EMSC   SOUTHERN GREECE              

P:  4JUN2018 117250    38.0N   24.0E 3.0-5.0 ABAAA  Aegean Sea                 

 

UNUSUAL QUAKES HIT HIGH LATITUDES OF ATLANTIC OCEAN

 

EARTHQUAKE SUMMARY FOR JUNE 4, 2018

 

Moderate earthquakes hit opposite ends of the Atlantic today at auroral latitudes. An M 4.4 in Greenland was followed later in the day by an M 4.8 on the Atlantic-Indian Ridge south of Africa. These may have been promoted by the end of the geomagnetic storm as noted in this summary in the previous issue:

 

"The geomagnetic field saw active conditions today. The AP level was 17. High latitude geomagnetic field saw minor storm conditions  with AP at 25. This is the most disturbance in the geomagnetic field in more than a month and could bring renewed seismicity near the geomagnetic equator and in auroral zones. This may begin in the next day but should reach maximum around June 6-8, 2018.  The last time of greater disturbance in the geomagnetic field was April 20, 2018 when AP reached 47 and high latitude AP was 56." (June 3, 2018)

 

The earthquake in Greenland of M 4.5 was the strongest within about 200 km of that epicenter since an M 4.9 on January 22, 2001, the only other event of M>=4.5 in that region in at least 30 years. Forecast 117354 had expected this event was likely within about 10 km of the epicenter around June 5.

 

NEIC reported this earthquake of M 4.5 in Greenland was felt with intensity II-III in the area(s) of Greenland at Nuuk and Kangerlussuaq, Sisimiut.

 

 

O:  4JUN2018 22:49:27  65.0N   52.2W mb=4.5  EMSC   WESTERN GREENLAND            

P:  5JUN2018 117354    65.0N   52.0W 2.5-4.4 AAAAA  Baffin/Davis Strait Canada 

 

The M 4.8 south of Africa on the Atlantic-Indian Ridge also was not felt in this remote area. It is the strongest earthquake within about 200 km of this epicenter since an M 5.0 on February 17, 2018 and prior to that an M 4.8 on June 4, 2017. Forecast 117397 had expected this earthquake was likely within this area around June 11.

 

O:  4JUN2018 15:56:53  52.5S   28.1E mb=4.8  EMSC   SOUTH OF AFRICA              

P: 11JUN2018 117397    51.0S   29.0E 4.0-5.4 CBAAA  Atlantic-Indian Ridge      

 

The strongest earthquake in the western hemisphere today was an M 5.2 in Guatemala. NEIC reported this earthquake of M 5.2 in Guatemala was felt with intensity II-III in the area(s) of Champerico, Retalhuleu and Antigua Guatemala, Sacatepequez, Guatemala. It was probably promoted by strong eruption at Fuego which began several days ago. This event was likely promoted by the eruption of Fuego Volcano near Guatemala City over the past several days. Forecat 117215 expected activity in the area around June 4.

 

O:  5JUN2018 04:54:42  13.2N   92.1W ML=4.7  EMSC   OFF THE COAST OF GUATEMALA   

O:  4JUN2018 15:06:45  13.4N   92.3W Mw=5.2  EMSC   OFF THE COAST OF GUATEMALA   

P:  4JUN2018 117215    13.0N   90.0W 3.5-5.3 AABAA  Guatemala                  

 

The strongest earthquake in the world today was an M 5.3 in the Banda Sea of Indonesia. An M 5.4 hit near this epicenter on April 23, the last such event within about 200 km of this epicenter. A strong M 6.5 hit the area on October 24, 2017 and this may be an aftershock of that event. Forecast 117192 had expected activity in this area around June 8.

 

O:  4JUN2018 18:24:37   7.1S  123.2E Mw=5.3  EMSC   BANDA SEA                    

P:  8JUN2018 117192     8.0S  122.0E 4.0-5.8 BAAAA  Flores Island area         

 

MAJOR VOLCANIC ERUPTIONS IN FUEGO, GUATEMALA; KILAUEA, HAWAII

 

EARTHQUAKE SUMMARY FOR JUNE 3, 2018

 

Major volcanic eruptions continued today in Kilauea, Hawaii and Fuego, Guatemala. These may have been promoted by the strong geomagnetic storm of the past several days and this was noted in the previous issue of this summary as:

 

"The geomagnetic field saw active conditions today. The AP level was 17. High latitude geomagnetic field saw minor storm conditions  with AP at 25. This is the most disturbance in the geomagnetic field in more than a month and could bring renewed seismicity near the geomagnetic equator and in auroral zones. This may begin in the next day but should reach maximum around June 6-8, 2018.  The last time of greater disturbance in the geomagnetic field was April 20, 2018 when AP reached 47 and high latitude AP was 56." (June 3, 2018)

 

Another strong eruption of Kilauea Volcano in Hawaii occurred today with associated magnitude M 5.5, the strongest since the M 6.9 of May 4, 2018 and the strongest in the world today. NEIC reported this earthquake/eruption

was widely felt with maximum intensity at Hawaii National Park and Paauilo; intensity IV in Volcano, Hawaii and lesser shaking at Mountain View, Hilo, Kurtistown, Keaau, Pepeekeo, Holualoa, Captain Cook, Naalehu, Kailua Kona, Kamuela, Paia, Honolulu, Kailua, Kapolei, Hawaii. The State of Hawaii reports a decrease in tourism of 50% since the eruptions began in April and May while only about 1% of the state is directly affected by the eruptions. Several people were evacuated today by air from the lava zones, but soon this may not be possible. Evacuations are now considered mandatory in the affected areas. Associated earthquakes of M 3.9, 3.8, 3.6 and 3.8 were reported felt with intensity II-III in Volcano, Hilo and Keaau, Hawaii. Forecast 117217 had expected this activity would continue around June 4.

 

O: 03JUN2018 21:01:30  19.4N  155.2W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 12:58:06  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 17:46:47  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 19:55:49  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 04JUN2018 01:44:30  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 12:56:18  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 16:41:04  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 04JUN2018 01:45:53  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 21:00:18  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 21:28:14  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 13:55:39  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 23:04:10  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 21:24:35  19.4N  155.3W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 03JUN2018 23:01:47  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 04JUN2018 01:50:48  19.4N  155.3W mw=5.5  ANSS   WSW of Volcano Hawaii

O:  4JUN2018 01:50:48  19.4N  155.3W ML=5.5  ANSS   ISLAND OF HAWAII, HAWAII     

P:  4JUN2018 117217    19.3N  155.2W 3.0-4.6 AAAAA  Hawaii                     

 

 

The Fuego volcano in Guatemala had a strong eruption today. About 3000 were evacuated and a number of injuries were reported with at least 25 killed. The eruption included flowing lava and ash cloud and fall.

 

The strongest earthquake in the U.S. or Canada today outside the Kilauea eruption was an M 4.2 in the Alaska Peninsula. A series of moderate quakes hit southeast of this on May 27-28 in the Unimak area but the last in the Alaska Peninsula within about 100 km of this epicenter with M>=4.2 was an M 4.3 on April 25, 2018. Forecast 117112 had expected this event within about 50 km of the epicenter in late May.

 

NEIC reported this earthquake of M 4.2 in Alaska was felt with intensity II-III in the area(s) of False Pass, Alaska.

 

O:  4JUN2018 05:38:21  54.6N  162.3W mb=4.2  EMSC   ALASKA PENINSULA             

P: 27MAY2018 117112    54.6N  163.6W 3.5-5.1 CAAAA  Unimak Islands, Aleutians  

 

Unusual earthquakes in North America today included an M 2.9 in the Vancouver Island area of Canada and an M 1.5 near Raymond, Maine early this morning.  The event in Vancouver was followed by an M 2.2 aftershock. The last event in the Vancouver Island area with M>=2.9 within about 100 km of this epicenter was an M 3.0 on April 4, 2018. The last of significantly larger magnitude was an M 3.8 on September 5, 2017. Forecast 117332 expected today's Vancouver event was likely within about 50 km of this epicenter around June 2.

 

NEIC reported this earthquake of M 2.9 in Vancouver Island, Canada was felt with intensity II-III in the area(s) of Walnut Grove, British Columbia.

 

O:  3JUN2018 14:50:32  48.8N  125.6W ML=2.2  EMSC   VANCOUVER ISLAND, CANADA REGIO

O:  3JUN2018 14:26:38  48.9N  125.4W ML=2.9  EMSC   VANCOUVER ISLAND, CANADA REGIO

P:  2JUN2018 117332    49.0N  126.0W 2.8-4.9 AAAAA  Vancouver Island area      

 

The earthquake near Raymond, Maine of M 1.6 was not reported felt.

The last event reported by NEIS within about 100 km of this epicenter with M>=1.6 occurred January 24, 2018 with M 1.6. The last of larger magnitude in this area was an 2.6 on January 17, 2018. Forecast 117311 had expected it within about 25 km was possible around June 5.

 

O:  4JUN2018 03:04:51  43.9N   70.4W ml=1.6  ANSS   NE of Raymond Maine          

P:  5JUN2018 117311    44.0N   70.0W 2.0-4.2 AAAAA  Maine                      

 

A moderate earthquake of M 4.7 continued the activation of Guam which began at the end of May.  NEIC reported this earthquake of M 4.7 in Guam was felt with intensity II-III in the area(s) of Guam at Tamuning, Mongmong, Talofofo and Merizo. A tropical cyclone may be forming near Guam, Marianas. This system has passed Guam over the past two days and may have promoted a strong increase in regional seismicity including this moderate, felt quake there today. The system is currently located at 13N 141E and moving WNW at 15 kts with winds up to 23 kts. Forecast 116986 had expected this activity was likely in Guam ar the end of May or early June.

 

O:  3JUN2018 12:43:21  13.4N  145.2E mb=4.7  EMSC   GUAM REGION                  

P: 28MAY2018 116986    13.0N  145.0E 4.0-5.6 BAAAA  So. Marianas/Guam          

 

GEOMAGNETIC STORM STIRS NEW SEISMICITY

 

EARTHQUAKE SUMMARY FOR JUNE 2, 2018

 

The largest earthquakes in the world today occurred in the region of Tonga with M 5.8 and M 5.8. They were felt with intensity II in Neiafu, Vava'u Tonga and occurred near local solar midnight and noon. The timing and location suggests promotional effects from the continuing geomagnetic storms combined with tidal stresses associated with the full moon as noted in the previous issue of this summary:

 

"The geomagnetic field saw active conditions today. The AP level was 26. High latitude geomagnetic field saw minor storm conditions  with AP at 46. This is the most disturbance in the geomagnetic field in more than a month and could bring renewed seismicity near the geomagnetic equator and in auroral zones. This may begin in the next day but should reach maximum around June 6-8, 2018.  Areas such as the Tonga arc, near the geomagnetic equator and the IDL area most vulnerable. Strong quakes in these areas would likely coincide with high tidal stresses (local solar noon and midnight) in the next several days. A series of moderate earthquake along the geomagnetic equator today in Chile and the Philippines probably showed effects of this geomagnetic storm but larger events are still expected." (June 1-2, 2018)

 

The last earthquakes of larger than M 5.8 in Tonga occurred near the northern epicenter today as an M 6.8 on November 4, 2017 and near the southern epicenter as  events of M 6.1 and 6.0 on October 8 and 18, 2017.

Forecasts 117369 and 117365 had expected today's activity in early June.

 

O:  3JUN2018 00:48:09  19.4S  173.8W Mw=5.8  EMSC   TONGA                        

P:  3JUN2018 117369    18.0S  175.0W 4.0-5.5 ABAAA  Tonga Islands              

 

O:  2JUN2018 13:03:21  15.0S  173.1W Mw=5.3  EMSC   TONGA                        

O:  2JUN2018 11:53:07  15.1S  173.5W Mw=5.8  EMSC   TONGA                        

P:  6JUN2018 117365    15.0S  175.0W 4.0-5.6 BABAA  Samoa Islands              

 

It appears the geomagnetic storm was a major promoter of today's enhanced seismicity. Most of the larger magnitude events were located near the geomagnetic equator or at high latitudes. This included an M 5.7-5.8 in the Talaud Islands of Indonesia.  BMG reported it was felt with intensity II-III in Naha-Kepulauan Sangihe and Melonguane, Sulawesi, Indonesia. The only event within the Talaud Islands in the past eight months of M>=5.7 was an M 5.7 on December 28, 2017 within about 50 km of today's epicenter. Forecasts 117185 and 116934 had expected this activity in late May or early June. The Talaud Islands lie within about a degree of the local geomagnetic equator.

 

O:  2JUN2018 20:55:55   4.6N  126.8E mb=4.6  EMSC   KEPULAUAN TALAUD, INDONESIA  

O: 02JUN2018 17:11:38   4.5N  126.7E mb=4.6  EMSC   KEPULAUAN TALAUD, INDONESIA

O: 03JUN2018 06:26:32   4.5N  126.8E mb=4.8  EMSC   KEPULAUAN TALAUD, INDONESIA

O: 02JUN2018 16:29:01   4.6N  126.8E Mw=5.7  EMSC   KEPULAUAN TALAUD, INDONESIA

O: 02JUN2018 16:28:59  04.6N  126.8E MS=5.8  BMG   Felt with intensity II-III

O: 02JUN2018 21:26:09   4.6N  126.8E mb=4.5  EMSC   KEPULAUAN TALAUD, INDONESIA

P:  2JUN2018 117185     2.0N  126.0E 4.0-5.7 ACAAA  Mindanao, Philippines      

P: 30MAY2018 116934     3.0N  127.0E 4.0-5.6 ABAAA  Halmahera                  

 

An earthquake of M 4.7 was widely felt in the Dominican Republic today. NEIC reported intensity IV in the Dominican Republic at Gonzalo, Monte Plata, Sanchez, Los Llanos, Samana, Yamasa, Santo Domingo, San Pedro de Macoris, El Carril, Bajos de Haina, Tenares, Nizao, Tireo, and in general within about 150 km of the epicenter. Lesser shaking of II-III intensity was felt in Don Juan, Hato Mayor, Las Terrenas, Los Botados, Nagua, Pimentel, Ramon Santana, Villa Altagracis, Piedra Blanca, San Gregoirio de Nigua, Bonao, Los Cacaos, La Romana, and other communities in the Dominican Republic within about 200 km of the epicenter. This is the strongest earthquake recorded in the Dominican Republic since an M 4.7-4.8 on October 29, 2017. The last of significantly larger magnitude in the Dominican Republic occurred as an M 5.8 on May 28, 2014. 

Forecast 117232 had expected it within about 50 km of the epicenter likely around June 5.

 

O:  3JUN2018 09:13:20  18.9N   69.6W mb=4.7  EMSC   DOMINICAN REPUBLIC           

P:  5JUN2018 117232    19.0N   69.0W 3.4-5.1 AAAAA  Puerto Rico                

 

The strongest earthquake in the U.S. or Canada today was an M 4.4 in the Queen Charlotte Islands region of Canada. It was not reported felt in the epicentral area. The event occurred new local solar noon and may have been promoted by both tidal and geomagnetic stresses. This is the strongest earthquake in the Queen Charlotte Islands within about  200 km of this epicenter since an M 4.6 on December 6, 2012, an aftershock of the M 7.7-8.0 of October 28, 2012, the second largest quake ever recorded in Canada. Forecast 117097 had expected this event at the end of May.

 

O:  2JUN2018 22:32:35  54.0N  133.9W ML=4.4  EMSC   QUEEN CHARLOTTE ISLANDS REGION

P: 25MAY2018 117097    53.0N  133.0W 3.0-5.1 CAAAA  British Colombia           

 

 

GEOMAGNETIC STORM LIKELY TO PROMOTE EQUATORIAL SEISMICITY

 

EARTHQUAKE SUMMARY FOR JUNE 1, 2018

 

The geomagnetic field saw active conditions today. The AP level was 26. High latitude geomagnetic field saw minor storm conditions  with AP at 46. This is the most disturbance in the geomagnetic field in more than a month and could bring renewed seismicity near the geomagnetic equator and in auroral zones. This may begin in the next day but should reach maximum around June 6-8, 2018.  Areas such as the Tonga arc, near the geomagnetic equator and the IDL area most vulnerable. Strong quakes in these areas would likely coincide with high tidal stresses (local solar noon and midnight) in the next several days. A series of moderate earthquake along the geomagnetic equator today in Chile and the Philippines probably showed effects of this geomagnetic storm but larger events are still expected.

 

A strong eruption of Kilauea Volcano, Hawaii with associated magnitude M 5.4 occurred today. This was the strongest earthquake reported in the world today. NEIC reported it was felt with maximum intensity IV in Volcano, Hawaii and II-III in Hawaii National Park, Pahala, Hilo, Keaau, PapaikouPaauilo and Naalehu, Hawaii. It is the strongest magnitude eruption since the M 6.9 of May 4 at Kilauea. It occurred as the geomagnetic indicies Kp reached 5-6, and may have been promoted by effects related to today's geomagnetic storm.

 

O: 01JUN2018 23:09:48  19.2N  155.5W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 21:32:22  19.3N  155.1W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 16:36:43  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 17:33:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 20:42:36  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 15:36:20  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 15:40:06  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 18:30:58  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 08:49:51  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 18:46:44  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 21:53:56  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 18:26:12  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 01JUN2018 21:50:43  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O:  1JUN2018 23:37:15  19.4N  155.3W Mw=5.4  EMSC   ISLAND OF HAWAII, HAWAII     

P:  4JUN2018 117217    19.3N  155.2W 3.0-4.6 BAAAA  Hawaii                     

 

HAWAII ERUPTION MAY DAMPEN GLOBAL SEISMICITY

 

EARTHQUAKE SUMMARY FOR MAY 31, 2018

 

An earthquake of M 4.8 occurred today in the region of the Azores west of Europe. As this earthquake occurred within a few degrees of maximum tidal stresses associated with the full moon and near local solar noon, it is likely that it was promoted by tidal stresses. It is also located at 101-102 degrees from the eruptions of Kilauea in Hawaii. The current very quiet global seismicity began about the same time as the Hawaii eruptions. The last earthquake in the world of M>6.2 was the M 6.9 in Hawaii of May 4, 2018. It is possible that the squishiness of the ground in the lava eruptions in Hawaii is a dissipation site for global motion and that this low level of seismicity will continue for the foreseeable future.

 

"The full moon arrived on May 29 at 14:20 UT. Subsolar longitudes at this  time were near 35W while anti-solar (sub-lunar) longitudes were near 145E. These include the Atlantic Ocean in the west and eastern Indonesia, Japan, and much of the western Pacific subduction zone in the east. High tidal stresses in these areas could help promoted a large earthquake in the next week. Areas where fluids (such as volcanic regions) mitigate seismicity are likely to see enhanced seismicity at this time as well." (May 28-June 1, 2018)

 

An earthquake of 5.2 on April 14, 2018 was the last in the Azores of M>4.8 within  about 200 km of today's epicenter. Forecast 117076 had expected today's event within about 50 km was likely at the end of May.

 

O: 31MAY2018 11:39:45  42.4N   29.3W mb=4.8  EMSC   AZORES ISLANDS REGION        

P: 24MAY2018 117076    42.0N   29.0W 4.0-5.7 CAAAA  No. Mid-Atlantic Ridge     

 

The strongest seismicity in the world today occurred as a series of three events in the Kermadec Islands, New Zealand. These were not felt in this remote area. The strongest was an M 5.6 south of the Kermadec Islands by events of M 5.3 and 4.6 also occurred. The southerly of these may be aftershocks of quakes in the area of May 17 and 18 of M 5.8 and 6.2. Forecast 117164 had expected this activity was likely at the end of May.

 

O:  1JUN2018 06:25:53  30.2S  179.2W mb=4.6  EMSC   KERMADEC ISLANDS REGION      

P: 30MAY2018 117164    31.0S  178.0W 4.0-5.9 AAAAA  So. Kermadec Islands        

 

O:  1JUN2018 01:59:33  32.4S  179.1W mb=5.3  EMSC   SOUTH OF KERMADEC ISLANDS    

O:  1JUN2018 04:52:30  33.2S  179.4W Mw=5.6  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 28MAY2018 117164    33.0S  179.0W 4.0-5.8 BAAAA  So. Kermadec Islands       

 

The strongest earthquake in the U.S. or Canada today was an M 3.9 in the Fox Islands, Alaska. It was not reported felt in the epicentral area. The last earthquake with M>=3.9 in the Fox Islands within about 100 km of this epicenter was an M 4.0 on May 9, 2018. In recent months about one such event occurs in the area in an average month. Forecast 117096 had expected this event in this area was likely at the end of May.

 

O: 31MAY2018 20:07:32  52.1N  171.6W ML=3.9  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 27MAY2018 117096    52.1N  172.8W 3.5-5.1 BAAAA  Andreanoff Isls, Aleutians 

 

CALIFORNIA ACTIVE; STRONG ERUPTIONS CONTINUE IN HAWAII

 

EARTHQUAKE SUMMARY FOR MAY 30, 2018

 

The region of California became active today. This was probably precipitated  by an M 3.8 event in the Thousand Palms region of southern California but an unfelt M 4.2 off the coast of northern California also occurred today. This event occurred within minutes of local solar noon and was probably promoted by high tidal stresses associated with the full moon which maximize at this hour.

NEIC reported the M 3.8 was felt with moderate intensity in Desert Hot Springs, Thousand Palms, Palm Desert, Cathedral City, Rancho Mirage, Palm Springs, Indio, Indian Wells, Joshua Tree, Palm Desert, Coachella, La Quinta, Yucca Valley, Morongo Valley, White Water, Mountain Center, Idyllwild, Banning and in general within about 150 km of the epicenter. The last event within about 100 km of this epicenter in Southern California with M>=3.8 was an M 4.5 on May 8, 2018 about 50 km to the west of this event. An M 3.9 on April 23, 2018 was the last within about 50 km of this epicenter. Forecast 117044 had expected a moderate quake in this area around May 28.

 

O: 30MAY2018 19:22:05  33.9N  116.3W Mw=3.8  EMSC   SOUTHERN CALIFORNIA          

P: 28MAY2018 117044    33.4N  116.7W 2.5-5.2 AAAAA  So. California             

 

The earthquake off northern California of M 4.2 is the strongest within about

100 km of that epicenter since an M 5.0 pm January 25, 2018.  Forecast 117080 had expected this event was likely within about 25 km around May 31.

 

O: 30MAY2018 15:41:04  40.6N  127.4W mb=4.2  EMSC   OFF COAST OF NORTHERN CALIFORN

P: 31MAY2018 117080    40.4N  127.2W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

A strong eruption with associated magnitude M 5.3 hit Kilauea Volcano in Hawaii today. NEIC reported it was felt with intensity IV in Hawaii National Park and Volcano and II-III in Hilo, Kailua Kona and Kamuela, Hawaii. Seventy-seven homes have been destroyed in the eruption. Residents have been warned to make voluntary evacuations or they may be stranded.

 

O: 30MAY2018 18:30:37  19.4N  155.0W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 12:04:12  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 13:12:03  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 14:23:18  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 17:50:19  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 07:48:41  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 15:01:54  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 20:47:59  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 20:50:06  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 14:59:11  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 07:50:47  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 19:49:39  19.4N  155.3W Md=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 30MAY2018 20:53:50  19.4N  155.3W Mw=5.3  EMSC   ISLAND OF HAWAII, HAWAII     

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 BAAAA  Hawaii                     

P: 28MAY2018 116974    19.9N  156.1W 3.0-4.5 AAAAA  Hawaii                     

 

The strongest earthquake in the world today was an M 5.2 in the Greenland Sea. It was not reported felt in this remote area. As it occurred near local solar noon, it is likely it was promoted by the strong tidal stresses associated with the full moon. The last earthquake of M>=5.2, and the only such event in the past half year, was an M 5.5 on February 8, 2018. This event occurred about 400 km north of today's epicenter. Forecast 117128  had expected a moderate earthquake in this area around May 30.

 

O: 30MAY2018 10:30:43  76.3N    2.0W mw=5.2  ANSS   Greenland Sea"               

O: 30MAY2018 10:30:42  76.3N    1.8W Mw=5.2  EMSC   GREENLAND SEA                

P: 30MAY2018 117128    72.0N    0.0E 3.0-4.6 ACAAA  Norway                     

 

An earthquake of M 5.2 was also widely felt in northern Colombia today, but no damage was reported with this event.  NEIC reported this earthquake of M 5.2 in Colombia was felt with intensity IV in Floridablanca, Santander, Colombia and II-III in the area(s) of San Gil, Bucaramanga, Duitama, San Cristobal, Tunja, La Calera, Santuario, Bogota, Medellin, Envigado, Sabaneta, Itagui. This is an area where moderate events are not uncommon but the region has been quiet at this level for several years. The last of M>=5.2 within about 100 km was an M 5.3 on November 7, 2015, an aftershock of an M 6.2 on March 10, 2015. Forecast 116930 had expected today's event within about 25 km was likely at the end of May. The antipode at 7S 107E in Java and Sumatra has been active in recent days and energy from this source may have helped promoted today's activity in Colombia.

 

O: 31MAY2018 03:02:09   6.8N   73.0W mb=5.2  EMSC   NORTHERN COLOMBIA            

P: 23MAY2018 116930     7.0N   73.0W 4.0-5.7 CAAAA  Colombia                   

 

FULL MOON MAY BRING INCREASED SEISMICITY

 

EARTHQUAKE SUMMARY FOR MAY 29, 2018

 

Seismicity in California and Nevada has been at very low levels over the past

week. Today only three events of M>=2 (all M 2.0-2.2) occurred in the region. This may represent precursory quiescence in the area which could be broken by the full moon which arrived today as noted in previous issues of this summary:

 

"The full moon arrived on May 29 at 14:20 UT. Subsolar longitudes at this time were near 35W while anti-solar (sub-lunar) longitudes were near 145E. These include the Atlantic Ocean in the west and eastern Indonesia, Japan, and much of the western Pacific subduction zone in the east. High tidal stresses in these areas could help promoted a large earthquake in the next week. Areas where fluids (such as volcanic regions) mitigate seismicity are likely to see enhanced seismicity at this time as well." (May 28-30, 2018)

 

The strongest earthquake in the world today was an M 5.4 in Vanuatu. It occurred near local solar noon and may have been promoted by strong tidal stresses associated with the full moon. The last earthquake within about 200 km of this epicenter with M>=5.4 in the Vanuatu region was an M 5.8 on April 30, 2018 and prior to that an M 5.6 on December 11, 2017. Forecast 117144 had expected a moderate event in southern Vanuatu around May 29.

 

O: 30MAY2018 02:32:50  15.7S  167.8E Mw=5.4  EMSC   VANUATU                      

P: 29MAY2018 117144    19.0S  168.0E 4.0-5.6 ACAAA  Vanuatu Islands            

 

The strongest earthquake in the U.S. or Canada today occurred in Central Alaska with M 4.3. NEIC reported it was felt with intensity II-III within about 200 km of the epicenter and noted at Matanuska-Sustina Border, Alaska and Talkeetna, Healy, Chugiak, Wasilla, Anchorage and possibly Fairbanks, Alaska. This is the strongest event within about 100 km of this epicenter since an M 4.6 about 100 km northwest of today's epicenter on August 31, 2017. Forecast 117118 had expected today's event was likely around May 30.

 

O: 29MAY2018 15:42:46  62.8N  149.1W ML=4.3  EMSC   CENTRAL ALASKA               

P: 30MAY2018 117118    63.1N  151.9W 3.2-5.2 AABAA  Central Alaska             

 

The largest earthquake in Hawaii was an M 4.2 part of a volcanic eruption. It was reported felt with moderate intensity IV in Volcano, Hawaii and I-II at Mountain View and Hilo, Hawaii.

 

O: 29MAY2018 06:10:56  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 06:53:58  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 10:02:20  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 05:33:50  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 07:43:20  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 11:56:11  19.4N  155.3W Ml=4.2  EMSC   ISLAND OF HAWAII, HAWAII     

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 BAAAA  Hawaii                     

P: 28MAY2018 116974    19.9N  156.1W 3.0-4.5 AAAAA  Hawaii                     

 

MAYOTTE AFTERSHOCK POSSIBLY TRIGGERED BY STRONGEST SOLAR FLARE IN TWO MONTHS

 

EARTHQUAKE SUMMARY FOR MAY 28, 2018

 

The strongest solar flare in the past two months occurred today peaking about

17:10 UT with class C2.7 (#5680). The previous largest was a C4.6 on March 30. Today's flare may have triggered a widely felt earthquake in the Mayotte region north of Madagascar. That event occurred at 17:09 UT near the geomagnetic equator. SFE from this flare may have helped promote this regional aftershock.

 

This M 4.9 was felt with intensity IV in Mayotte at Koungou and II-III in Pamanzi and Tsingoni today. NEIC reported an aftershock of M 4.7 in Mayotte was felt with intensity V in Mayotte at Pamanzi and Sada and II-III in the area(s) of Dembeni and Tsingoni, Mayotte. Forecast 117135 expected this activity was likely around May 26.

 

O: 28MAY2018 22:12:34  12.8S   45.7E mb=4.7  EMSC   MAYOTTE REGION               

O: 28MAY2018 17:09:27  13.0S   45.5E mb=4.7  EMSC   MAYOTTE REGION               

O: 28MAY2018 13:55:14  13.4S   45.8E mb=4.9  EMSC   MAYOTTE REGION               

P: 26MAY2018 117135    13.0S   45.0E 3.0-4.4 AAAAA  Mayotee area               

 

The strongest earthquake in the world today was an M 5.2-5.6 in the Sumbawa region of Indonesia.  BMG reported this earthquake was felt with intensity II in Kuta, Sumbawa, Indonesia. NEIC reported this earthquake of M 5.2 in Sumbawa, Indonesia was felt with intensity IV in Bima and Denpasar, Bali and II-III in the area(s) of Praya, Ubud, Kuta, Bali, Indonesia. The last earthquake within about 200 km of this epicenter with M>=5.6 occurred on December 29, 2016 with M 6.2.  Forecast 116963 had expected today's event was likely within about 150 km of this epicenter around May 29.

 

O: 28MAY2018 19:25:28   9.2S  118.4E Mw=5.2  EMSC   SUMBAWA REGION, INDONESIA    

O: 28MAY2018 19:25:26   9.2S  118.4E MS=5.6  BMG  Felt with intensity II in Kuta,

P: 29MAY2018 116963     8.0S  119.0E 4.0-5.5 ABAAA  Sumbawa Island area        

 

The strongest earthquake in the U.S. or Canada today was an M 4.4 in the Unimak Island region of Alaska. This remote event was not reported felt in this area which has been active the past several days. An M 4.8 hit the area on May 27  and this may be the strongest aftershock to date of that event. Forecast 117112 had expected today's event in the Unimak Is. area was likely around May 27.

 

O: 28MAY2018 11:47:48  53.3N  163.7W ML=3.2  EMSC   UNIMAK ISLAND REGION, ALASKA 

O: 28MAY2018 11:25:07  53.5N  163.8W mb=4.4  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 27MAY2018 117112    54.6N  163.6W 3.5-5.1 ABAAA  Unimak Islands, Aleutians  

 

The strongest earthquake in the current eruption of Kilauea Hawaii was an M 4.1. NEIC reported it was felt with intensity IV in Volcano Hawaii and II-III in Hawaii at Mountain View, Pahoa, Hilo, Keaau, Papaikou and Pepeekeo. More than 25 earthquakes of M>=3 hit Hawaii, the most to date in the current eruption. At least 80 structures have been destroyed by lava flow and more are expected to meet similar fate as the eruption shows no signs of stopping. Some of the M>3 events today returned to the original site of the eruption - the Leilani Estates

with on following the C2.7 class solar flare (M 3.3 quake) within minutes.

With the increased activity in solar flares coinciding with the full moon it may not be possible to differentiate promotional effects but the seismicity in Hawaii is likely to continue at high levels for several more days.

 

O: 28MAY2018 14:42:56  19.2N  155.5W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 10:19:12  19.4N  155.0W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 17:53:47  19.4N  155.0W ML=3.3  EMSC   HAWAII REGION, HAWAII

O: 28MAY2018 12:31:19  19.4N  155.3W MD=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 16:36:42  19.4N  155.3W MD=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 07:21:46  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 10:48:48  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 12:34:46  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 13:23:49  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 14:33:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 19:03:29  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 03:38:05  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 08:40:36  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 09:36:31  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 14:45:19  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 11:07:09  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 16:33:38  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 04:54:19  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 23:25:27  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 06:53:58  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 16:40:10  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 07:43:20  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 06:21:21  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 12:29:19  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 29MAY2018 03:39:36  19.4N  155.3W Ml=4.1  EMSC   ISLAND OF HAWAII, HAWAII     

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 BAAAA  Hawaii                     

P: 28MAY2018 116974    19.9N  156.1W 3.0-4.5 AAAAA  Hawaii                     

 

 

A light earthquake of M 3.0 occurred in Central California near San Jose and Morgan Hill today. NEIC reported this earthquake of M 3.0 in Central California near San Jose was felt with intensity II-III in the area(s) of California at San Jose, Morgan Hill, Santa Clara, Aptos, Mountain View, Dublin, San Carlos, and Burlingame. The last earthquake within about 50 km of this epicenter with M>=3 occurred on May 16, 2018 with M 3.2 within 10 km of today's epicenter. Forecast 117014 had expected this event was likely around May 28 within this area.

 

O: 29MAY2018 00:14:50  37.3N  121.7W MD=3.0  EMSC   NORTHERN CALIFORNIA          

P: 28MAY2018 117014    37.8N  122.6W 2.5-4.5 AAAAA  Central California         

 

 

MODERATE QUAKE SHAKES NORTHEASTERN CHINA

 

EARTHQUAKE SUMMARY FOR MAY 27, 2018

 

A moderate earthquake of M 5.1 occurred today in northeastern China and was widely felt. NEIC reported it was felt with intensity up to V nearly 300 km from the epicenter in Panshi, Jilan, China and IV in Heilongjiang at Hulan, and Anda and in Jilan at Changchun, and Changling. Lesser shaking was reported in Jilan and Heilongjiang at Qianguo, Baicheng, Longfeng, Ranghulu, Harbin, Angangxi, China. The last (and only events in the area in the past 25 years) earthquake of M>=5.1 within about 250 km of this epicenter were events of M 5.5 on November 22, 2013 and a similar event of M 5.4 on October 31, 2013. These occurred about 100 km southwest of today's epicenter. Forecast 116852 had expected activity to the northwest of this towards the end of May. This event occurred near local solar midnight and may have been promoted by the coming full moon as noted in this report:

 

"The full moon will arrive on May 29 at 14:20 UT. Subsolar longitudes at this time are near 35W while anti-solar (sub-lunar) longitudes are near 145E. These include the Atlantic Ocean in the west and eastern Indonesia, Japan, and much of the western Pacific subduction zone in the east. High tidal stresses in these areas could help promoted a large earthquake in the next week. Areas where fluids (such as volcanic regions) mitigate seismicity are likely to see enhanced seismicity at this time as well." (May 28, 2018)

 

O: 27MAY2018 17:50:54  45.2N  124.6E Mw=5.1  EMSC   JILIN-HEILONGJIANG BDR, CHINA

P: 18MAY2018 116852    50.0N  121.0E 3.0-4.4 CCBAA  So. Siberia                

 

Seismicity in Hawaii was at high levels today. The strongest event was an M 3.6.

NEIC reported this and other earthquakes in Hawaii today were felt lightly in Volcano, Hilo, Papaikou and Hawaii National Park, Hawaii. Forecast 116974 had expected this activity at the end of May.

 

O: 27MAY2018 06:22:47  18.9N  155.4W ML=3.0  EMSC   HAWAII REGION, HAWAII

O: 27MAY2018 11:50:54  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 27MAY2018 18:36:47  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 02:28:09  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 03:52:16  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 27MAY2018 22:39:52  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 28MAY2018 06:21:21  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 27MAY2018 21:01:05  19.5N  155.4W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII     

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 AAAAA  Hawaii                     

 

The strongest earthquakes in the U.S. or Canada today were located in the Unimak Island area of Alaska and included an M 4.8 and several moderate aftershocks. The only earthquake of larger magnitude in the Unimak area in the past half year was an M 5.1 on February 27, 2018. The most recent moderate quake in the area was an M 4.3 on May 12, 2018. Forecast 117112 had expected this activity in the Unimak Island area was likely around May 27. It is likely this moderate activity will continue for the next several days in the Unimak region.

 

O: 27MAY2018 20:00:31  53.4N  163.5W mb=4.0  EMSC   UNIMAK ISLAND REGION, ALASKA 

O: 27MAY2018 07:58:01  53.4N  164.2W mb=3.4  EMSC   UNIMAK ISLAND REGION, ALASKA 

O: 27MAY2018 19:33:36  53.5N  163.7W mb=4.8  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 27MAY2018 117112    54.6N  163.6W 3.5-5.1 ABAAA  Unimak Islands, Aleutians  

 

The strongest earthquake in the world today was an M 5.2 in the Fiji region. This follows a similar event in the region yesterday as noted in the previous issue of this summary:

 

"The largest earthquake was an M 5.2 in the Fiji Region east of central Vanuatu. This is the strongest earthquake within about 200 km of this epicenter since an M 5.2 near two years ago on August 17, 2016. The last of larger magnitude was an M 5.7 about 100 km northeast of this epicenter on November 13, 2014. Forecast 116876 had expected this event was likely in the Fiji area in late May." (May 27, 2018)

 

O: 28MAY2018 06:08:07  15.8S  173.2E mb=5.2  EMSC   FIJI REGION                  

O: 27MAY2018 08:58:02  16.0S  173.4E mb=5.0  EMSC   FIJI REGION                  

P: 21MAY2018 116876    14.0S  172.0E 4.0-5.7 CBAAA  Fiji Islands               

 

QUIET GLOBAL SEISMIC CONDITIONS CONTINUE

 

EARTHQUAKE SUMMARY FOR MAY 26, 2018

 

The quiet global seismicity which has persisted since the eruption of Hawaii continued today. The largest earthquake was an M 5.2 in the Fiji Region east of central Vanuatu. This is the strongest earthquake within about 200 km of this epicenter since an M 5.2 near two years ago on August 17, 2016. The last of larger magnitude was an M 5.7 about 100 km northeast of this epicenter on November 13, 2014. Forecast 116876 had expected this event was likely in the Fiji area in late May.

 

O: 27MAY2018 06:16:32  15.9S  173.3E mb=5.2  EMSC   FIJI REGION                  

P: 21MAY2018 116876    14.0S  172.0E 4.0-5.7 CBAAA  Fiji Islands               

 

An earthquake of M 2.7 was widely felt in the San Francisco Bay, California area today. NEIC reported it was felt with intensity II-III in Alamo, Diablo, Danville, Walnut Creek, Clayton, San Ramon, Concord, Moraga, Lafayette, Pleasant Hill, Dublin, Concord, San Bruno, Stockton and Sacramento, California. An earthquake of M 3.3 hit this epicenter on April 30, 2018 and another to the west of this on May 15, 2018. Forecast 117014 had expected today's event was likely around May 28.

 

O: 27MAY2018 01:24:27  37.9N  122.0W MD=2.7  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 28MAY2018 117014    37.8N  122.6W 2.5-4.5 AAAAA  Central California         

 

An unusually large earthquake of M 4.0 occurred today in southern Spain.  The last earthquake of M>=4 within about 100 km of this epicenter was an M 4.4 on January 31, 2012 and prior to that an M 5.1 on May 11, 2011 after a six year seismic quiet in the area. Forecast 116758 had expected an event in late May within about 25 km of today's epicenter.

 

O: 26MAY2018 18:58:15  38.1N    2.2W ML=4.0  EMSC   SPAIN                         

P: 19MAY2018 116758    38.0N    2.0W 3.5-5.2 CAAAA  Morocco/Spain              

 

The earthquake in Spain was accompanied by two of M 3.0 in Poland. These appear to continued the widening seismicity in northern Europe which started with a swarm (and continues) in the Czech Republic and northern Germany border region. Most of these are located at distances from Hawaii which suggest a promotional effect from the Kilauea eruption. Forecast 117105 had expected the activity in Poland around May 28.

 

O: 26MAY2018 05:31:40  51.4N   16.0E ML=3.0  EMSC   POLAND                       

O: 26MAY2018 15:36:35  51.5N   15.9E ML=3.0  EMSC   POLAND                       

P: 28MAY2018 117105    51.0N   16.0E 3.0-4.5 AAAAA  Poland                      

 

Seismicity continued in Hawaii today but at a lesser magnitude level. Further eruptions and evacuations are expected. More than 80 structures have been destroyed by lava to date.

 

O: 27MAY2018 06:22:47  18.9N  155.4W ML=3.0  EMSC   HAWAII REGION, HAWAII        

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 AAAAA  Hawaii                     

 

HAWAII SEES ELEVATED SEISMICITY

 

EARTHQUAKE SUMMARY FOR MAY 25, 2018

 

The strongest earthquake associated with the Kilauea eruption on Hawaii today was an M 4.0. NEIC reported it was felt with intensity V in Lanai City Hawaii and IV in Volcano, Hawaii. It was also felt with intensity II-III in Hilo, Pahala and Kamuela, Hawaii. More than 37 homes have been destroyed thus far in this eruption, mostly in the eastern portion of the island of Hawaii. Seismicity in the area was somewhat elevated today with more than 20 events of M>=3. Thousands of acres have been covered by lava and more evacuations are planned.

 

O: 26MAY2018 02:13:33  19.4N  155.0W Md=3.0  EMSC   HAWAII REGION, HAWAII

O: 25MAY2018 10:41:30  19.4N  155.0W Ml=3.8  EMSC   HAWAII REGION, HAWAII

O: 25MAY2018 19:28:02  19.4N  155.3W MD=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 12:09:06  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 12:13:41  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 16:35:03  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 18:04:30  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 18:19:26  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 21:11:02  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26MAY2018 00:04:10  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 26MAY2018 01:23:49  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 16:36:20  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 22:30:38  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 22:48:37  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 26MAY2018 02:25:44  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 26MAY2018 00:06:08  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 18:29:51  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 22:43:40  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 17:41:27  19.4N  155.3W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 22:47:31  19.4N  155.3W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 AAAAA  Hawaii                     

 

An earthquake of M 4.9 was widely felt in eastern Honshu, Japan today. NEIC reported intensity VI in Niigata It was also felt with intensity III-IV in Nagano, Gunma, Saitama, Fukushima, Ibaraki, Tokyo, Chiba, and Shizuoka Prefectures, Japan. This is a somewhat unusual epicenter, the second in the region during May 2018. Previous earthquakes within about 100 km of this epicenter occurred on December 5, 2017 (M 5.0) and July 17, 2016 (M 5.0). Forecast 117029 had expected the area to be active at the end of May.

 

O: 25MAY2018 12:13:44  37.0N  138.6E mb=4.9  EMSC   EASTERN HONSHU, JAPAN        

P: 30MAY2018 117029    38.0N  135.0E 3.5-5.4 BACAA  No. Honshu, Japan          

 

The strongest earthquakes in the U.S. or Canada today were  an M 4.2 in the Gulf of Alaska and an M 3.8 in Central Alaska. NEIC reported this earthquake of M 3.8 in Central Alaska was felt with intensity II-III in the area(s) of Talkeetna, Alaska. The quake in the Gulf of Alaska was not unusual in this aftershocks zone. A smaller M 3.4 aftershock occurred about 100 km to the east of the M 3.8. A similar earthquake of M 3.8 hit this epicenter on February 2, 2018. Forecast 117118 expected this event within about 50 km of the epicenter was likely at the end of May.

 

O: 25MAY2018 08:16:31  58.4N  151.1W Ml=3.5  EMSC   KODIAK ISLAND REGION, ALASKA 

O: 25MAY2018 17:56:10  62.5N  151.3W ML=3.8  EMSC   CENTRAL ALASKA               

O: 26MAY2018 04:10:53  62.6N  149.6W Ml=3.4  EMSC   CENTRAL ALASKA               

P: 30MAY2018 117118    63.1N  151.9W 3.2-5.2 BAAAA  Central Alaska             

 

A series of minor earthquakes hit northern Europe today expanding the activation of this area outside the swarm in the Czech Republic. The largest of these was an M 3.7 in Belgium. This is the strongest earthquake in Belgium since an M 4.4 on September 8, 2011. Forecast 117102 had expected this event in Belgium was likely within about 50 km of this epicenter around May 29.

 

O: 25MAY2018 22:43:26  51.1N    5.5E ML=3.7  EMSC   BELGIUM                      

P: 29MAY2018 117102    51.0N    6.0E 3.0-4.4 BAAAA  Netherlands/Belgium         

 

MODERATE EARTHQUAKES SHAKE OCEAN RIDGES; EXTENSION ZONES

 

EARTHQUAKE SUMMARY FOR MAY 24, 2018

 

A series of moderate and unusual earthquake occurred today on Ocean Ridges and in the extension zones of Africa. These included event of M>=5 in the Central Mid-Atlantic Ridge; Namibia; Mayotte and in two areas of the South Indian Ocean. It is likely they were promoted by effects from a series of B- and C-class solar flares, the strongest solar outburst since the end of March, 2018.

 

The strongest of these was an M 5.5 in the central Mid-Atlantic Ridge. This is within about 200 km of an M 5.3 of December 16, 2017. An M 6.5 also occurred about 600 km to the east on November 30, 2017. An M 5.5 on May 23, 2018 also  occurred northwest of today's epicenter on May 23, 2018. Forecast 116927 had expected today's event was likely towards the end of May. This event may have been promoted by tidal stresses as it occurred within about an hour of local solar midnight.

 

O: 24MAY2018 23:11:47   0.8N   29.6W Mw=5.5  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P: 29MAY2018 116927     1.0N   28.0W 4.0-5.6 BABAA  Central Mid-Atlantic Ridg  

 

Forecasts 117168 and 117163 had expected the events of M 5.0 in the Mid-Indian Ridge and the Southeast Indian Ridge towards the end of May. The event in the Southeast Indian Ridge may be an aftershock of an M 6.2 which hit within about 100 km of this epicenter on March 24, the strongest to date.

 

O: 24MAY2018 15:04:12  45.2S   95.8E mb=5.0  EMSC   SOUTHEAST INDIAN RIDGE       

P: 29MAY2018 117168    46.0S   96.0E 4.0-5.6 BAAAA  So. Indian Ocean           

 

The event in the Mid-Indian Ridge is the strongest within about 250 km of  this epicenter since an M 5.3 to the north on October 24, 2017.

 

O: 24MAY2018 15:50:42  35.6S   78.3E mb=5.0  EMSC   MID-INDIAN RIDGE             

P: 25MAY2018 117163    37.0S   79.0E 4.0-5.6 ABAAA  So. Indian Ocean           

 

An pair of unusual earthquakes of M 5.0 with an aftershock of M 4.3 shook the region of Namibia today. NEIC reported they were felt with intensity II in Khorixas, Kuene, Namibia. This series is located at 171 degrees from Hawaii, in the antipodal area of Hawaii about 9 degrees from the antipode. It is likely that it was promoted from that eruption and series of earthquakes. An earthquake of M 4.8 hit this area of Namibia on March 14, 2018. At the time this summary noted in this regard:

 

"An unusual earthquake of M 4.8 hit the region of Namibia in Southern Africa today. It was not reported felt or damaging in this remote area. The last earthquake within about 500 km of this epicenter in or near Namibia occurred on March 24, 2012 with M 4.8. Two other such events have occurred in this region since 1990 - an M 5.1 on July 31, 2009 and an M 4.8 on April 26, 2008. A series of earthquakes in Mozambique, Tanzania and Malawi occurred last week following the M 7.6 in Papua New Guinea at 103-104 degrees from that strong quake. Today's event is not at this distance from PNG (it is at the third node - 120 degrees). However, like the events in Mozambique it is located at 142 degrees from the great M 8.0 in the Gulf of Alaska of January 23. Seismic energy from major earthquake reflects and refracts off core boundaries and returns to the surface at this distance from the major event. As seismicity in this distance zone increases in the days following, it is likely promoted by this concentrated energy. The Namibia epicenter is also at 103 degrees from the M 7.6 north of Honduras of January 10, 2018. Energy reflected from core-mantle boundaries returns to the surface at this distance and probably triggers zonal earthquakes at this distance." (March 14, 2018)

 

Forecast 117149 had expected an earthquake near the Hawaiian antipode was likely in late May.

 

O: 24MAY2018 12:04:45  19.7S   14.7E mb=4.3  EMSC   NAMIBIA                       

O: 24MAY2018 07:08:13  19.8S   14.6E mb=5.0  EMSC   NAMIBIA                      

P: 26MAY2018 117149    26.0S   18.0E 3.0-5.0 ACCAA  Rep. South Africa          

 

The current series in Mayotte also continued today with events of M 4.8 and 5.0.

NEIC reported this earthquake of M 5.0 in Mayotte was felt with intensity V in Pamanzi and Dzaoudzi and II-III in the area(s) of Mamoudzou and Ouangani, Mayotte. Earlier in the day an M 4.8 was felt with intensity IV in Sada, Mayotte and III in Pamanzi and Mamoudzou, Mayotte. This is located at a distance near the antipode from Hawaii suggesting some promotion from that event. These events may also have been triggered by energy from the Bolivia event of April 2, 2018 which lies at 102 degrees from these epicenters. Forecast 117135 had expected this activity to continue in late May.

 

O: 24MAY2018 04:23:57  12.9S   45.6E mb=4.8  EMSC   MAYOTTE REGION               

O: 25MAY2018 06:36:03  12.9S   45.7E mb=5.0  EMSC   MAYOTTE REGION               

P: 26MAY2018 117135    13.0S   45.0E 3.0-4.4 AAAAA  Mayotee area               

 

Among ocean ridge events today was an M 4.6 off the coast of Oregon. This is the second event in this region of M>=4.6 in the past four days - including an M 4.6 about 100 km to the east on May 20. This summary had noted this earlier event as:

 

"The strongest earthquake in the U.S. or Canada outside Hawaii today was an M 4.6 off the coast of Oregon. NEIC reported it was lightly felt in Oregon at Bandon, Coos Bay, Gold Beach, Eugene, Salem, Clackamas. This is the largest earthquake off the coast of Oregon since an M 4.9 on January 28 and the third largest in the past seven months - an M 4.7 occurred November 24, 2017. Forecast 116820 had expected this event off the coast of Oregon was likely around May 18." (May 20, 2018)

 

O: 24MAY2018 23:09:16  43.7N  127.9W mb=4.6  EMSC   OFF COAST OF OREGON          

P: 18MAY2018 116820    43.9N  128.4W 3.0-4.4 AAAAA  Off Coast of Oregon        

P: 22MAY2018 117081    44.3N  129.4W 3.0-4.4 AABAA  Off Coast of Oregon        

 

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the central Aleutians near Adak. NEIC reported it was felt with intensity IV in Adak, Alaska. This event of M 4.9 is the strongest in the central Andreanof Islands since an M 5.2 on February 16, 2018. Forecast 117095 had expected today's event was likely around May 24.

 

O: 25MAY2018 03:54:22  51.8N  175.9W mb=4.9  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 24MAY2018 117095    51.9N  176.0W 3.5-5.0 AAAAA  Andreanoff Isls, Aleutians 

 

Earthquakes continued to be felt in the Kilauea eruption. Most were felt with intensity II-III in Volcano, Hawaii.

 

O: 25MAY2018 00:41:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 01:37:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 02:02:17  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 01:04:56  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 25MAY2018 00:14:39  19.4N  155.3W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 26MAY2018 116974    19.3N  155.2W 3.0-4.4 AAAAA  Hawaii                     

 

The strongest earthquake in the world today was an M 5.4 in the Fiji Islands. It was not reported felt in this epicentral area. The last event within about  200 km of this epicenter in Fiji with M>=5.4 was an M 5.7 on November 8, 2017 and also March 9, 2018.  Forecast 117154 had expected continuing moderate seismicity in this region around May 25.

 

O: 24MAY2018 14:48:48  21.3S  178.1W Mw=5.4  EMSC   FIJI REGION                  

P: 25MAY2018 117154    22.0S  175.0W 4.0-5.6 AACAA  Tonga Islands              

 

SCATTERED MODERATELY LARGE QUAKES CONTINUE

OCEAN RIDGES LIKELY TO BECOME ACTIVE WITH SOLAR FLARE RETURN

 

EARTHQUAKE SUMMARY FOR MAY 23, 2018

 

The sun became active today with a series of B-class and one C-class solar flares reported by SWPC. This is likely to increase seismicity in volcanic areas such as mid-Ocean Ridges and at active volcanic eruption sites such as in Hawaii. Induced telluric currents dissipate heat into the magma allowing more motion in these bodies and more bubbles to rise to the surface and produce strain as they expand and rise. The last flare of C-class occurred on March 30, 2018.

 

Light earthquakes continued in Hawaii today. These were generally felt in the Volcano National Park and in Volcano, Hawaii with light intensity.

 

O: 24MAY2018 02:21:25  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 24MAY2018 03:55:13  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 24MAY2018 04:25:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 24MAY2018 03:11:57  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 23MAY2018 06:33:54  19.4N  155.5W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 23MAY2018 19:41:22  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 18MAY2018 116705    19.3N  155.3W 4.0-5.5 BAAAA  Hawaii                     

 

The strongest earthquake in the world today was an M 5.2 south of Panama. It

was not reported felt in this epicentral area. Forecast 116664 had expected this event was likely in mid-May.

 

O: 23MAY2018 12:42:43   7.4N   82.7W mb=5.2  EMSC   SOUTH OF PANAMA               

P: 17MAY2018 116664     8.0N   83.0W 3.5-5.0 CAAAA  Costa Rica                 

 

EARTHQUAKE SUMMARY FOR MAY 22, 2018

 

Strong eruptions continued at Kilauea, Hawaii today. Light earthquakes accompanying these eruptions were reported felt lightly in Hawaii National Park and Volcano, Hawaii.

 

O: 23MAY2018 00:19:49  19.4N  155.2W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 23MAY2018 06:31:00  19.4N  155.3W MD=2.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 23MAY2018 01:51:59  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 23MAY2018 02:00:34  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 23MAY2018 05:17:24  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 22MAY2018 18:19:37  19.4N  155.0W ML=3.0  EMSC   HAWAII REGION, HAWAII        

P: 18MAY2018 116705    19.5N  154.9W 3.0-4.6 AAAAA  Hawaii                     

 

The strongest earthquake in the U.S. or Canada today was an M 4.1 in the central

Andreanof Islands, Aleutians, Alaska. It was not reported felt in this remote area. The last earthquake with greater magnitude within about 100 km of this epicenter was an M 4.8 on March 14, 2018. Forecast 116837 had expected this event to the south of this epicenter around May 18.

 

O: 22MAY2018 07:50:29  52.3N  174.7W mb=4.1  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P: 18MAY2018 116837    50.6N  174.7W 3.5-5.1 BBAAA  Andreanoff Isls, Aleutians 

 

The strongest earthquake in the world today was an M 5.6 in the area east of Kamchatka. It was not reported felt in this remote area. This is the strongest earthquake near the east coast of Kamchatka in more than seven months. Forecast 116843 had expected this activity was likely around May 20.

 

 

O: 23MAY2018 01:37:50  55.2N  161.9E Mw=5.6  EMSC   NEAR EAST COAST OF KAMCHATKA 

P: 20MAY2018 116843    55.0N  165.0E 4.0-5.8 AABAA  Komandorsky Isl             

 

A moderately large earthquake also hit the region of the Central Mid-Atlantic Ridge with M 5.5. This is a remote area and the quake was not reported felt.  This is the strongest earthquake in this area in at least a half year. An M 5.2 hit near this epicenter on October 19, 2017. Forecast 116660 expected this event to the southeast was likely around May 21.

 

O: 23MAY2018 05:44:43   7.5N   36.3W Mw=5.5  EMSC   CENTRAL MID-ATLANTIC RIDGE   

P: 21MAY2018 116660     5.0N   33.0W 4.0-5.7 ACCAA  Central Mid-Atlantic Ridg  

 

MORE MODERATELY STRONG QUAKES SHAKE GUAM

 

EARTHQUAKE SUMMARY FOR MAY 21, 2018

 

The strongest earthquakes in the world today occurred in the region near Guam and Indonesia. The strongest of these was an M 5.6 and an aftershock of M 5.1 in Guam but an M 5.4 also occurred in the New Britain area of PNG. Seismicity also continued south of Sumatra with an M 4.7. This area is antipodal to northern Colombia and often seismicity in Sumatra is followed by enhanced seismicity in Colombia with about a day delay. An M 5.5 on May 17, 2018 began the current activity in Guam but today's event is the strongest in the region since an M 5.8 on November 15, 2017. Forecasts 116720 and 116719 had expected this activity in Guam was likely around May 16-19.

 

NEIC reported this earthquake of M 5.6 in Guam was felt with intensity II-III in the area(s) of Guam at Merizo, Tamuning, Hagatna, Asan and Santa Rita.

 

O: 22MAY2018 00:26:08  12.9N  145.4E Mw=5.6  EMSC   GUAM REGION                  

O: 22MAY2018 02:24:21  12.9N  145.4E mb=5.1  EMSC   GUAM REGION                  

P: 16MAY2018 116720    13.0N  145.0E 4.0-5.9 CAAAA  So. Marianas/Guam          

P: 19MAY2018 116719    12.0N  144.0E 4.0-5.6 BAAAA  So. Marianas/Guam          

 

The earthquake of M 5.4 in the Bougainville Region, PNG joins events of M 5.4 in the area on November 15, 2017 and January 23, 2018. It was not reported felt. No earthquakes of M>5.4 have occurred in this area in at least half a year. Forecast 116680 had expected this event within about 100 km was likely around May 17.

 

O: 21MAY2018 19:12:57   6.5S  155.1E Mw=5.4  EMSC   BOUGAINVILLE REGION, P.N.G.  

P: 17MAY2018 116680     7.0S  154.0E 4.0-5.5 BAAAA  New Britain                

 

The earthquake in Sumatra is located at 104 degrees from Hawaii and may  have been promoted from that source. It was expected in forecast 116689 around May 18.

 

O: 21MAY2018 14:38:36   6.7S  102.3E mb=4.7  EMSC   SOUTHWEST OF SUMATRA, INDONESI

P: 18MAY2018 116689     7.0S  104.0E 4.0-5.4 BABAA  So. of Sumatera            

 

Earthquakes continued in the Kilauea eruption today. The largest of these were reported with intensity II-III in Hawaii at Pahoa, Mountain View, Kurtistown, Keaau, Hilo, Pepeekeo, Naalehu and Paauilo, Hawaii. Lava was entering the ocean today combining with water to create laze, a mist containing glass from the lava. More evacuations were expected and respirators were being distributed to protect from the laze. A hydrothermal power plant which supplies the island of Hawaii with about 25% of its energy was in danger from the lava flows. More strong steam eruptions are expected.

 

The swarm of earthquakes on the Czech-northern Germany border continued today. The strongest event in this series occurred today with M 4.1 and was widely felt in the Czech Republic and Germany. Previously the strongest earthquakes in this series were a pair of events of M 3.7 on May 14. Forecast 116845 had expected this activity in mid-May within about 100 km of these epicenters. At 109 degrees

 from Hawaii, this sequence may be promoted from Hawaii.

 

NEIC reported this earthquake of M 4.1 in the Czech Republic was felt with intensity V in Libesice, Czech Republic; IV in Pila and II-III in the area(s) of Karlovy Vary, Prague and Vranenad Vltavou, Czech Republic and in Maxhutte Haidhof, Germany.

 

O: 21MAY2018 21:16:08  50.2N   12.5E ML=3.2  EMSC   CZECH REPUBLIC               

O: 21MAY2018 21:04:42  50.2N   12.5E ML=4.1  EMSC   CZECH REPUBLIC               

O: 21MAY2018 19:52:38  50.3N   12.5E ML=3.1  EMSC   CZECH REPUBLIC               

P: 16MAY2018 116845    51.0N   13.0E 3.0-4.6 BAAAA  Netherlands/Belgium        

 

An aftershock in Central Italy of M 4.0 was also felt in that region today.

 

MODERATE QUAKE SHAKES CENTRAL MEXICO

 

EARTHQUAKE SUMMARY FOR MAY 20, 2018

 

A moderate earthquake of M 5.2 was widely felt in Guerrero, Mexico today. NEIC reported it was felt with intensity up to IV as far as 600 km from the epicenter at Jalapa, Tabasco, Mexico and in the state of Mexico at Nezahualcoyotl. Lesser shaking of II-III was reported from Veracruz, Xadani, Oaxaca, Cuautitlan, Tlalnepntla, Coatepec, Ixtapaluca, Texmelucan, Tres Marias, Morelos, in Puebla at Cuanala, Cuautlancingo, Momoxpan, Puebla, Santa Maria la Alta; in Guerrero at Acapulco, Huitzuco, Chilpancingo and intensity V in Guerrero at Xalpatlahuac and Ometepec, Mexico. This is the strongest earthquake in Guerrero, Mexico in the past eight months. A similar M 5.2 hit south of this epicenter on March 20, 2018, the only such event of M>5 in this time period. No damage or casualties were reported with today's earthquake. Forecast 116717 had expected this activity was likely around May 15-18. This activity is located at the seventh node (51.4 degrees) from the M 6.8 in Bolivia of April 2 and from the Kilauea eruptions in Hawaii. Other activity at this node from Hawaii today included an M 2.4 in southern Texas and  a M 2.4 in Oklahoma.

 

O: 21MAY2018 02:33:33  17.1N   98.7W ML=4.5  EMSC   GUERRERO, MEXICO             

O: 21MAY2018 02:15:21  17.4N   98.4W mb=5.2  EMSC   GUERRERO, MEXICO             

P: 15MAY2018 116717    16.0N   98.0W 3.5-5.1 CBAAA  Oaxaca, Mexico             

P: 18MAY2018 116717    18.0N   97.0W 3.5-5.1 BAAAA  Oaxaca, Mexico              

 

A moderately strong aftershock of M 5.5 also shook the Mayotte region north of

Madagascar. NEIC reported maximum intensity in Mayotte of IV in Sada with V in Pamanzi, Dzaoudzi, Mamoudzou, Koungou, and II-III in Dembeni, Kanikeli, Mayotte. Also reported felt with intensity II in Madagascar at Antsirambazaha. A foreshock of M 5.3 earlier in the day shook the same area with similar intensities. This is part of a series which has shook the region for the past two week, but the M 5.5 is the strongest after an M 5.8 on May 15. The area had not experienced this type of seismicity in the past. Forecast 116878 expected this activity in mid-May. Like the eruption of Kilauea, also unprecedented in the past 100 years these events are located at 102 degrees from the M 6.8 in Bolivia of April 2 and were probably promoted by concentrated seismic energy from that source.

 

O: 20MAY2018 08:01:29  12.9S   45.7E Mw=5.3  EMSC   MAYOTTE REGION               

O: 21MAY2018 00:47:13  12.9S   45.7E mb=5.5  EMSC   MAYOTTE REGION               

P: 15MAY2018 116878    13.0S   44.0E 3.0-4.4 CABAA  Madagascar area            

 

An M 4.9-5.1 earthquake was strongly felt in al-Mazzunah, Sidi Bu Zayd, Tunisia today with intensity reported at VIII and in Qafsah, Tunisia with lesser shaking. This is the largest earthquake in Tunisia in the past half year. An M 4.6 occurred about 300 km northeast of this epicenter in Tunisia on March 8, 2018.  Forecast 116791 had expected this activity around May 19.

 

O: 21MAY2018 00:18:34  34.2N    9.7E mb=4.9  EMSC   TUNISIA                      

P: 19MAY2018 116791    37.0N    5.0E 3.0-4.6 ACCAA  Western Mediterranean      

 

Seismicity in the Kilauea eruption was reduced today as the lava was more fluid.

Earthquakes of M>=3 were felt with intensity II-III in Pahoa, Hawaii. A volcanic explosion at Kilauea registering M 4.9 was felt lightly in Hilo and Keaau, Hawaii. Forecast 116705 had expected today's activity around May 18.

 

O: 20MAY2018 14:30:42  19.3N  155.1W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 20MAY2018 21:52:29  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 20MAY2018 21:50:07  19.4N  155.3W Mw=4.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 20MAY2018 12:49:01  19.4N  155.5W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 20MAY2018 23:38:31  19.5N  154.9W ML=3.3  EMSC   HAWAII REGION, HAWAII        

P: 18MAY2018 116705    19.3N  155.3W 4.0-5.5 AAAAA  Hawaii                     

P: 18MAY2018 116705    19.5N  154.9W 3.0-4.6 AAAAA  Hawaii                     

 

 

The strongest earthquake in the U.S. or Canada outside Hawaii today was an M 4.6 off the coast of Oregon. NEIC reported it was lightly felt in Oregon at Bandon, Coos Bay, Gold Beach, Eugene, Salem, Clackamas. This is the largest earthquake off the coast of Oregon since an M 4.9 on January 28 and the third largest in the past seven months - an M 4.7 occurred November 24, 2017. Forecast 116820 had expected this event off the coast of Oregon was likely around May 18.

 

O: 20MAY2018 10:47:12  43.4N  126.7W mb=4.6  EMSC   OFF COAST OF OREGON          

P: 18MAY2018 116820    43.9N  128.4W 3.0-4.4 AAAAA  Off Coast of Oregon        

 

ELEVATED SEISMICITY CONTINUES ALONG IDL

 

EARTHQUAKE SUMMARY FOR MAY 19, 2018

 

The strongest earthquake in the world today was an M 5.6 in Tonga. This was probably promoted by strong tidal stresses but was not reported felt in the  epicentral area. An M 4.9 followed about half an hour later. Earthquakes of

M>=5.5 in Tonga are not uncommon. Today's event was expected within about 10-25 km of the epicenter likely around May 18. This activity in Tonga is at 101 degrees from the M 6.8 in Bolivia of April 2 and was likely promoted from that source. Other activity today at 101-103 degrees from Bolivia occurred as an M 4.9 in Mayotte, and as an M 4.5 in North Island, New Zealand.

 

O: 20MAY2018 01:14:34  21.0S  173.9W mb=4.9  EMSC   TONGA                        

O: 20MAY2018 00:42:24  21.2S  174.3W Mw=5.6  EMSC   TONGA                        

P: 18MAY2018 116901    21.0S  174.0W 4.0-5.6 AAAAA  Tonga Islands              

 

A moderate earthquake in North Island, New Zealand also occurred along the International Date Line (IDL) today. GEONET reported this earthquake was felt with light intensity northeast of Whanganui and in southwestern North Island and northern South Island. Light to moderate intensity was reported throughout much of southern and western North Island and northern South Island. More than 1229 people reported feeling this earthquake with 873 reports of weak intensity; 336 of light intensity; 17 with moderate intensity; 3 with strong intensity; and 0 of severe or extreme intensity. NEIC reported this earthquake of M 4.5 in North Island, New Zealand was felt with intensity II-III in the area(s) of Levin, Manawatu-Wanganui, New Zealand. Forecast 116918 had expected today's earthquake in New Zealand was likely within about 50 km of the epicenter around May 20. This epicenter is at 101 degrees from the M 8.0 in the Gulf of Alaska of January 23.

 

O: 19MAY2018 22:40:06  39.5S  174.3E mb=4.5  EMSC   NORTH ISLAND OF NEW ZEALAND  

O: 19MAY2018 22:40:08  39.6S  174.4E ML=4.5  GEONET Felt with light intensity

P: 20MAY2018 116918    40.0S  175.0E 3.0-4.7 AAAAA  North Island, N.Z.         

 

Two large fissures opened up in the Kilauea eruption today. Lava in the area is  increasingly fluid and moving faster. Many new evacuations are occurring due to the speed of these lava flows. Highways are increasingly useless for movement in the area. The strongest earthquake of the day in the U.S. or Canada was an M 5.0 following an M 4.9 foreshock earlier in the day, a large quake for an area with active lava flows. Forecast 116705 had expected this activity was likely around May 18.

 

O: 20MAY2018 00:05:42  19.4N  155.0W ML=3.0  EMSC   HAWAII REGION, HAWAII

O: 20MAY2018 01:58:13  19.4N  155.3W Mw=4.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 19MAY2018 09:58:28  19.4N  155.3W Mw=5.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 18MAY2018 116705    19.3N  155.3W 4.0-5.5 AAAAA  Hawaii                     

 

A light earthquake of M 3.5 and a foreshock of M 3.2 hit the area near Aguanga, Southern California today. NEIC reported these events were felt with intensity II-III within about 100 km of the epicenters in southern California. Among reports of II-III shaking were those from Oceanside, Carlsbad, La Quinta, Vista, San Marcos, Cathedral City, Rancho Mirage, Sun City, Murietta, Palm Desert, Fallbrook, Menifee, Temecula, Palm Springs, Sn Jacinto, Hemet, Murietta, Idyllwild, Mountain Center, Winchester, Warner Springs, Temecula, Pala, Anza and Aguanga, California. NEIC reported the aftershock  of M 2.7 in Southern California was felt with intensity II-III in the area(s) of Warner Springs, Mountain Center, Valley Center and Temecula, California.  This continues elevated seismicity in this area which has been ongoing since the PNG M 7.6 of February 25 at 103 degrees from this epicenter. Forecast 116776 had expected today's activity was likely within about 10 km of the epicenter around May 18, 2018.

 

O: 19MAY2018 23:32:50  33.5N  116.6W ML=2.7  EMSC   SOUTHERN CALIFORNIA

O: 19MAY2018 20:16:32  33.5N  116.8W ML=2.3  EMSC   SOUTHERN CALIFORNIA

O: 19MAY2018 19:24:14  33.5N  116.8W ML=3.2  EMSC   SOUTHERN CALIFORNIA

O: 19MAY2018 19:26:51  33.5N  116.8W ML=3.5  EMSC   SOUTHERN CALIFORNIA          

P: 18MAY2018 116776    33.4N  116.7W 2.5-4.8 AAAAA  So. California             

 

MODERATE QUAKES SHAKE PANAMA CITY, PANAMA

 

EARTHQUAKE SUMMARY FOR MAY 18, 2018

 

The strongest earthquakes of the day occurred as an M 5.4 and 5.1 South of Panama. NEIC reported this earthquake of M 5.2-5.4 South of Panama  was felt with intensity II-III in the area(s) of Panama City, Panama. The last earthquake with M>=5.4 in the area south of Panama within about 200 km of today's activity occurred with M 5.7 on February 5, 2016 and prior to that as an M 6.2 on June 4, 2012. Forecast 116671 had expected a moderate earthquake in this area around May 20. These epicenters are located at the fifth node (72 degrees) from the eruption and earthquakes in Hawaii and were probably promoted from that source.

 

O: 18MAY2018 13:56:37   4.0N   82.5W Mw=5.2  EMSC   SOUTH OF PANAMA              

O: 18MAY2018 12:43:55   4.0N   82.6W Mw=5.4  EMSC   SOUTH OF PANAMA              

P: 20MAY2018 116671     2.0N   85.0W 4.0-5.5 ABCAA  So. of Panama              

 

A light M 3.5 quake hit the area of Texas today near Venus, Texas. NEIC reported it was felt in Texas within about 300 km of the epicenter. Reports of intensity II-III cam from  Texas at Livingston, San Marcos, Austin, Longview, Stephenville, Valley Mills, Clifton, Fort Worth, Red Oak, Arlington, Wacahachie, Crowley, Joshua, Cedar Hill, Cleburne, Kennedale, Midlothian, Grand Prairie, Burleson, Mansfield, Venus and Alvarado. and from Lawton, Oklahoma. Two events of M 2.6 and 2.7 also continued activity in western Texas today. Forecast 116773 had expected this activity within about  100 km of these epicenters was likely around May 20.

 

O: 19MAY2018 00:45:39  32.5N   97.2W mb=3.5  EMSC   NORTHERN TEXAS               

 

O: 18MAY2018 12:04:06  31.6N  104.5W ML=2.7  EMSC   WESTERN TEXAS                

O: 18MAY2018 06:34:15  31.6N  104.5W mb=2.6  EMSC   WESTERN TEXAS                

P: 20MAY2018 116773    32.6N  104.6W 2.0-4.0 AAAAA  SW U.S.A                   

 

Lava in the eruption of Kilauea, Hawaii flowed much faster today - about 1000 ft per hour hindering evacuation and endangering local residents trying to flee. This is probably due to the increased amount of water in this lava which probably comes from below the water table. NEIC reported the strongest earthquakes in the area today, including an M 3.7 were felt with intensity II-III in Hawaii at Kealakekua, Kailua Kona, Captain Cook, Holualoa and Kamuela among others. The earthquake of M 3.7 occurred west of the island of Hawaii and is not directly linked to the Kilauea eruption but may reflect changes of stress  related to the movement of magmas in that eruption. Forecast 116727 had expected this event to the west within about 50 km of the epicenter. The eruptive  activity near Kilauea was expected in forecast 116705.

 

O: 18MAY2018 19:38:10  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 18MAY2018 21:47:51  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 19MAY2018 05:09:16  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 19MAY2018 06:19:59  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 19MAY2018 00:34:36  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 18MAY2018 16:44:13  19.5N  156.4W ML=3.7  EMSC   HAWAII REGION, HAWAII        

P: 15MAY2018 116727    20.1N  156.1W 4.0-5.6 AAAAA  Hawaii area                

P: 16MAY2018 116705    19.2N  155.0W 3.0-5.5 AAAAA  Hawaii                     

P: 18MAY2018 116705    19.3N  155.3W 4.0-5.5 AAAAA  Hawaii                     

 

The strongest earthquake in the U.S. or Canada today was an M 4.6 in the Fox Islands, Aleutians, Alaska.  This continues the activation of this region which coincided with the new moon tides. The last earthquake of M>=4.6 in the Fox Islands was an M 4.9 on March 4, 2018. Today's event was not reported felt in the epicentral area. Forecast 116841 expected this activity within about 100 km of the epicenter around May 15-17.

 

O: 18MAY2018 14:00:55  53.0N  167.6W mb=4.6  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 15MAY2018 116841    53.7N  167.0W 3.5-5.1 BAAAA  Fox Islands, Aleutians     

P: 17MAY2018 116841    52.5N  166.5W 3.5-4.9 AAAAA  Fox Islands, Aleutians     

 

STRONG SEISMICITY IN KERMADEC ISLANDS, NEW ZEALAND

 

EARTHQUAKE SUMMARY FOR MAY 17, 2018

 

The strongest earthquake today was an M 6.2 south of the Kermadec Islands, New Zealand. NEIC reported it may have been felt in Tonga and Auckland, New Zealand but these are far from the epicenter and questionable reports. The M 6.2 was accompanied by a series of five moderate to moderately large events across the Kermadec arc. It is likely they were promoted by elevated tidal stresses as noted in previous summaries and associated with the new moon as:

 

"The new moon arrived at 11:48 UT on May 15. Longitudes within about 20 degrees

of the IDL and the Greenwich Meridian  saw the strongest tidal effects from this alignment. These include the Aleutians and the Tonga/Fiji/Vanuatu/New Zealand arc in the east and western Europe and the central Atlantic in the west. This has been a common occurrence in recent months and tidally ready areas such as these are unlikely to see major events although moderate seismicity is likely. Other areas prone to tidal triggering with the new moon, such as volcanic areas of Hawaii may  see moderate to major earthquake through May 19." (May 13-17, 2018)

 

The earthquakes today in the Kermadec Islands were probably not felt in the

 region. The last earthquake of M>=6 in the Kermadec Islands was an M 6.2 in the central Kermadecs on December 8, 2017. An earthquake of M 5.8 about 100 km north of today's M 6.2 occurred on May 16, 2018. Forecast 116916 had expected today's activity was likely in mid-May.

 

O: 18MAY2018 02:47:45  30.4S  177.7W mb=5.1  EMSC   KERMADEC ISLANDS, NEW ZEALAND

P: 21MAY2018 116916    31.0S  178.0W 4.0-5.6 BAAAA  So. Kermadec Islands       

 

O: 18MAY2018 04:51:06  31.1S  179.4W mb=5.0  EMSC   KERMADEC ISLANDS REGION      

P: 16MAY2018 116911    30.0S  179.0W 4.0-5.6 ABAAA  No. Kermadec Islands       

P: 21MAY2018 116916    31.0S  178.0W 4.0-5.6 BAAAA  So. Kermadec Islands       

 

O: 17MAY2018 18:24:47  32.0S  178.5W mb=5.1  EMSC   KERMADEC ISLANDS REGION      

O: 17MAY2018 21:43:10  32.1S  180.0W mb=5.7  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 17MAY2018 116916    32.0S  178.0W 4.0-5.5 AAAAA  So. Kermadec Islands       

 

O: 18MAY2018 01:45:31  34.7S  178.4W Mw=6.2  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 18MAY2018 116916    34.0S  180.0W 4.0-5.8 AAAAA  So. Kermadec Islands       

 

 

An earthquake of M 5.5 occurred in Guam today. This follows a smaller foreshock in the region yesterday. NEIC reported today's event was felt with intensity IV in Merizo, Guam and II-III in Guam within about 100 km of the epicenter at Yigo, Tamuning and Dededo. The last event in Guam of M>=5.5 was an M 5.8 on November 15, 2017 and December 27, 2017 with M 5.5. In the previous issue of this summary when a foreshock of M 4.6 hit the region this summary noted in this regard:

 

"The strongest earthquake in the U.S. or Possessions today was an M 4.6 in Guam.

NEIC reported this earthquake of M 4.6 in Guam was felt with intensity II-III in the area(s) of Barrigada and Asan, Guam. It is likely that this earthquake was promoted by Tropical Depression 04W which passed through the area earlier this week. Further seismicity in the region of Guam can be expected in the next several days due to stresses from TD 04W.

 

"Tropical Depression 04W formed east of Guam and the Mariana Islands today with winds up to 40 kts. This system is currently expected to track to the northwest reaching the Volcano Islands around May 14 where it might help promote seismicity.  The M 5.6 in the Mariana Islands yesterday may have been promoted by this storm." (May 11-13, 2018)

 

Guam is also located on the geomagnetic equator and it is likely today's  event was promoted by a minor geomagnetic storm which is in progress. Forecast 116720 had expected today's Guam earthquake was likely within about 50 km of the epicenter around May 16." (May 17, 2018)

 

 

O: 17MAY2018 18:47:04  13.0N  145.5E mb=5.5  EMSC   GUAM REGION                  

P: 16MAY2018 116720    13.0N  145.0E 4.0-5.9 AAAAA  So. Marianas/Guam          

 

An M 5.8 also shook Hokkaido, Japan today. NEIC reported it was felt with intensity III in Obihiro, Hokkaido, Japan. No damage was reported. The last earthquake in Hokkaido with larger magnitude was an M 6.2 on January 24, 2018 about 300 km southwest of today's epicenter. An M 5.5 occurred 50-100 km from today's epicenter on April 24, 2018. Forecast 116802 had expected today's event within about 100 km was likely around May 20.

 

O: 17MAY2018 18:42:10  42.8N  145.5E Mw=5.8  EMSC   HOKKAIDO, JAPAN REGION       

P: 20MAY2018 116802    43.0N  147.0E 3.5-5.6 BAAAA  Hokkaido, Japan            

 

An unusual earthquake of M 4.2 also shook Iceland today. This is midway between active areas to the south and north and represents a somewhat different epicenter for an M>=4 event. It was probably promoted by tidal stresses maximized at the new moon. The last earthquake within about 200 km of this epicenter with M>=4 was an M 4.8 on September 20, 2012 and prior to that an M 6.3 on May 29, 2008.

 

Forecast 116603 had expected regional activity in mid-May. This epicenter is located at the fourth node from Hawaii and may have been  promoted from that source.

 

O: 17MAY2018 16:00:42  65.9N   21.8W mb=4.2  EMSC   ICELAND                      

P:  8MAY2018 116603    66.0N   17.0W 3.0-4.5 CABAA  Iceland area                

 

The strongest earthquake in the U.S. or Canada today was an M 4.4 in the Fox Islands, Aleutians. The area was active in late 2017 but the last earthquake in the Fox Islands of M>=4.4 was an M 4.4 on April 26, 2018. The largest in the area during the current year was an M 5.1 on January 28, 2018. Forecast 116841 had expected today's event in the Fox Islands was likely around May 15-17.

 

NEIC reported this earthquake of M 4.4 in the Fox Islands, Alaska was felt with intensity II-III in the area(s) of Unalaska, Alaska.

 

O: 17MAY2018 19:41:11  53.0N  167.5W mb=4.4  EMSC   FOX ISLANDS, ALEUTIAN ISLANDS

P: 15MAY2018 116841    53.7N  167.0W 3.5-5.1 AAAAA  Fox Islands, Aleutians     

P: 17MAY2018 116841    52.5N  166.5W 3.5-4.9 AAAAA  Fox Islands, Aleutians     

 

Strong eruptions continued at Kilauea today - some sending ash as far as six miles into the air and raining down on the island of Hawaii. This activity is expected to continue for the foreseeable future. Watches and warnings are in effect for Hawaii via local and USGS agencies.

 

O: 17MAY2018 14:34:17  19.5N  154.9W Ml=3.6  EMSC   HAWAII REGION, HAWAII        

P: 18MAY2018 116705    19.5N  154.9W 3.0-4.6 AAAAA  Hawaii                     

 

SIGNIFICANT ERUPTION AT KILAUEA, HAWAII

 

EARTHQUAKE SUMMARY FOR MAY 16, 2018

 

Earthquakes continued to be felt in Hawaii in the region near Volcano with intensity II-III. The strongest earthquake in the area of Hawaii today was an M 4.4 at the summit of Kilauea. NEIC reported it was felt with intensity IV in Volcano and II-III in Hawaii National Park, Keaau, Hilo, Papaikou, Kamuela, and Kailua Kona, Hawaii. An M 3.5 was felt with intensity IV in Volcano and II-III in Pahoa, Hilo, Pepeekeo, Hawaii. About 0600 Local Time an ash plume reached 30,000 feet with a number of large blocks being ejected from the Halemaumau crater. People were advised to stay indoors and air traffic was routed away from the ash cloud.

 

O: 16MAY2018 15:04:17  19.3N  155.2W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 11:30:57  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 14:00:25  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 18:34:11  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 11:56:39  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 20:49:57  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 06:45:38  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 14:38:20  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 16:27:49  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 18:35:47  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 18:45:27  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 18:31:57  19.4N  155.3W ML=3.9  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 21:31:07  19.4N  155.3W ML=4.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 18:30:45  19.4N  155.3W mb=4.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 16MAY2018 18:30:45  19.4N  155.3W ml=4.4  ANSS   WSW of Volcano Hawaii        

O: 17MAY2018 04:51:38  19.5N  154.9W Ml=3.4  EMSC   HAWAII REGION, HAWAII        

P: 15MAY2018 116705    19.3N  155.3W 4.0-7.5 AAAAA  Hawaii                     

 

An unusual earthquake of M 4.9-5.1 shook the region of central Mexico today at the exact seventh node (51.4 degrees) from Hawaii and from the Gulf of Alaska M 8.0 of January 23, 2018. NEIC reported this earthquake of M 4.9 south of Mexico City, Mexico  was felt with intensity II-III in the area(s) of San Jose Ixtapa, Huitzuco, Guerrero; in the State of Mexico at Valle de Bravo, Mexico City, Zacamulpa, Coatepec, Naucalpan, Nezahualcoyotl, Ixtalpaluca, and in Puebla at Atzompa, Puebla, it was also felt in the states of Tlaxcala, Guanajuato, Mishoacan and Jalisco, Mexico.  This is the strongest earthquake within about 100 km of this epicenter near Mexico City since an M 5.5 on September 30, 2015. Forecast 116717 had expected this event was likely to the south around May 14.

 

O: 16MAY2018 14:20:29  18.4N  100.3W mb=5.1  EMSC   ESTADO DE MEXICO, MEXICO     

P: 14MAY2018 116717    17.0N  100.0W 3.5-5.5 ABAAA  Oaxaca, Mexico             

 

An earthquake of M 3.1 also hit the region south of San Francisco, California near Morgan Hill today.  NEIC reported this earthquake of M 3.2 in Central California near Morgan Hill was felt with intensity II-III in the area(s) of San Jose, Morgan Hill, Coyote, Milpitas, Santa Clara, Sunnyvale, Cupertino, Mountain View, Santa Cruz, Los Altos, Dublin and Danville, California.  This continues light earthquakes of the past several days in the area which might mark an upswing of seismicity in the area. Forecast 116745 expected today's event was likely within about 25 km of the epicenter around May 14.

 

O: 17MAY2018 01:55:25  37.3N  121.6W MD=2.0  EMSC   NORTHERN CALIFORNIA          

O: 16MAY2018 21:32:11  37.3N  121.6W ML=3.1  EMSC   NORTHERN CALIFORNIA          

P: 14MAY2018 116745    37.1N  121.5W 2.5-4.6 AAAAA  Central California          

 

The strongest earthquake in the world today was an M 5.8 in the area south of the Kermadec Islands, New Zealand. It was not reported felt in this remote area. The last earthquake within about 150 km of this epicenter in the area south of the Kermadec Islands with M>=5.8 was an M 5.8 on August 24, 2012. More recent earthquakes of M>=5.8 have been occurring 200-250 km northeast of today's epicenter including an M 5.8 on December 4, 2017 and a similar event on September 7, 2015. Forecast 116916 expected today's event within about 50 km of this epicenter was likely around May 18. More and perhaps stronger activity in this region is likely in the next several days. This epicenter was located within about one degree longitude of the maximum tidal stress with the new moon. It was probably promoted by strong tidal stresses associated with the new moon as noted in previous summaries:

 

"The new moon arrived at 11:48 UT on May 15. Longitudes within about 20 degrees of the IDL and the Greenwich Meridian  saw the strongest tidal effects from this alignment. These include the Aleutians and the Tonga/Fiji/Vanuatu/New Zealand arc in the east and western Europe and the central Atlantic in the west. This has been a common occurrence in recent months and tidally ready areas such as these are unlikely to see major events although moderate seismicity is likely. Other areas prone to tidal triggering with the new moon, such as volcanic areas of Hawaii may  see moderate to major earthquake through May 19." (May 13-16, 2018)

 

 

  

O: 16MAY2018 17:22:13  33.9S  179.5W Mw=5.8  EMSC   SOUTH OF KERMADEC ISLANDS    

P: 18MAY2018 116916    34.0S  180.0W 4.0-5.8 AAAAA  So. Kermadec Islands       

 

The strongest earthquake in the U.S. or Possessions today was an M 4.6 in Guam.

NEIC reported this earthquake of M 4.6 in Guam was felt with intensity II-III in the area(s) of Barrigada and Asan, Guam.  It is likely that this earthquake was promoted by Tropical Depression 04W which passed through the area earlier this week. Further seismicity in the region of Guam can be expected in the next several days due to stresses from TD 04W.

 

"Tropical Depression 04W formed east of Guam and the Mariana Islands today with winds up to 40 kts. This system is currently expected to track to the northwest reaching the Volcano Islands around May 14 where it might help promote seismicity.  The M 5.6 in the Mariana Islands yesterday may have been promoted by this storm." (May 11-13, 2018)

 

Guam is also located on the geomagnetic equator and it is likely today's  event was promoted by a minor geomagnetic storm which is in progress. Forecast 116720 had expected today's Guam earthquake was likely within about 50 km of the epicenter around May 16.

 

O: 16MAY2018 07:24:34  12.9N  145.5E mb=4.6  EMSC   GUAM REGION                   

P: 16MAY2018 116720    13.0N  145.0E 4.0-5.9 AAAAA  So. Marianas/Guam          

 

NEW MOON AND SAN FRANCISCO SEISMICITY COINCIDE

 

EARTHQUAKE SUMMARY FOR MAY 14, 2018

 

A light earthquake of M 3.5 in the San Francisco Bay area today was widely felt.  

It was probably triggered by high tidal stresses with the new moon today. The area has shown tidal promotion in the past several month, a sign that a strong earthquake may be brewing in the region. The tidal earthquake forecast in this summary had read:

 

 

"The new moon will arrive at 11:48 UT on May 15. Longitudes within about 20 degrees of the IDL and the Greenwich Meridian will see the strongest tidal effects from this alignment. These include the Aleutians and the Tonga/Fiji/Vanuatu/New Zealand arc in the east and western Europe and the central Atlantic in the west. This has been a common occurrence in recent months and tidally ready areas such as these are unlikely to see major events although moderate seismicity is likely. Other areas prone to tidal triggering with the new moon, such as volcanic areas of Hawaii may  see moderate to major earthquake through May 19." (May 12-14, 2018)

 

NEIC reported this earthquake of M 3.5 was felt with intensity IV in Oakland, Moraga, Orinda, Berkeley, Emeryville, Castro Valley, San Leandro, Lafayette, San Leandro, Walnut Creek, Albany, San Francisco, Alamo and Hayward and in general within about 75 km of the epicenter in California. The last earthquake within about 50 km of this epicenter with M>=3.5 occurred as an 3.5 on September 13, 2016 and an M 3.9 on August 30, 2016. Earthquakes of M 4.1 and 3.9 occurred about 75 km southwest of this on October 10 and December 27, 2017 respectively. Forecast 116745 had expected this event within about 25 km of today's epicenter was likely around May 16. Aftershocks are likely in the next several days especially near local solar midnight (about 8:00 UT) and noon (about 20:00 UT). Earthquakes of M 3.1 and 3.0 occurred off the coast of northern California today

within minutes of local solar noon and were also probably promoted by tidal

stresses associated with the new moon.

 

O: 15MAY2018 02:18:34  37.8N  122.2W Mw=3.5  EMSC   SAN FRANCISCO BAY AREA, CALIF.

P: 16MAY2018 116745    38.0N  122.3W 2.5-4.4 AAAAA  Central California         

 

Earthquakes and volcanism continued today migrating to the north and west towards Kilauea. Many of these including an M 3.6 were felt with intensity II-III  in Hilo, Pahoa, Volcano, Hawaii. Forecast 116705 expected this activity around May 15.

 

O: 14MAY2018 17:40:02  19.4N  155.0W ML=3.3  EMSC   HAWAII REGION, HAWAII

O: 14MAY2018 11:37:00  19.4N  155.0W Ml=3.2  EMSC   HAWAII REGION, HAWAII

O: 15MAY2018 03:49:00  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 15MAY2018 05:18:13  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 06:40:33  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 22:40:41  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 15MAY2018 04:42:17  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 14:23:53  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 15MAY2018 03:44:51  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 15MAY2018 01:16:49  19.4N  155.4W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 20:31:46  19.4N  154.9W ML=3.3  EMSC   HAWAII REGION, HAWAII        

P: 15MAY2018 116705    19.3N  155.3W 4.0-7.5 AAAAA  Hawaii                     

 

A moderate M 5.1 earthquake north of Madagascar in Mayotte continued the series in that region which has persisted for the past three days. This is the strongest earthquake in this area to date. NEIC reported today's event was felt with intensity IV in Mayotte at Mamoudzou, Sada, Chiconi, Tsingoni and Mtsamboro and II-III in Dzaoudzi and Pamanzi, Mayotte. Forecast 116878 had expected this event within about 100 km of the epicenter was likely around May 15.

 

O: 14MAY2018 14:41:42  12.9S   45.6E mb=5.1  EMSC   MAYOTTE REGION               

P: 15MAY2018 116878    13.0S   44.0E 3.0-4.4 AABAA  Madagascar area            

 

The strongest earthquake in the world today was an M 5.8 in the South Sandwich Islands. It was not reported felt in this region. The new moon tidal stresses probably helped promote this event in the central Atlantic (see above). This  is the strongest earthquake in the South Sandwich Islands since an M 6.0 on September 14, 2017 and prior to that an M 6.5 more than a year ago on May 10, 2017. Forecast 116925 had expected this event within about 10 km of the epicenter around May 18.

 

O: 14MAY2018 18:14:50  56.0S   27.1W mb=5.8  EMSC   SOUTH SANDWICH ISLANDS REGION

P: 18MAY2018 116925    56.0S   27.0W 4.0-5.8 BAAAA  So. Sandwich Islands       

 

 

 

 

EXPLOSIVE VOLCANIC WARNING ISSUED FOR KILAUEA; STATE OF EMERGENCY

 

EARTHQUAKE SUMMARY FOR MAY 13, 2018

 

Earthquakes in Hawaii continued in the current eruption today. These have largely migrated to Kilauea at larger magnitudes but light earthquakes continued in the new vents to the east. NEIC reported the larger of these of M 3.0-3.5 were felt in Hawaii National Park with intensity V; IV in Hilo and in Volcano and Pepeekeo, Honomu, Hawaii with intensity II. The strongest event in the eastern vents was an M 4.2-4.6 near the Leilani Estates. It was felt with intensity IV in Pahoa, Volcano and II-III in Kurtistown, Mountain View, Keaau, Hilo, Papaikou, Pepeekeo, Honomu, Hakalau, Laupahoehoe, Captain Cook and Kailua Kona, Hawaii. The state of Hawaii has been declared a Federal Disaster Zone and an explosive volcanic eruption warning was issued today following the opening of the 18 vent in the new eruption. Forecast 116453 expected this activity in early May.

 

 

O: 13MAY2018 07:12:19  19.3N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 15:45:09  19.3N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 07:22:14  19.3N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 07:33:41  19.3N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 10:53:14  19.4N  154.9W ML=3.3  EMSC   HAWAII REGION, HAWAII

O: 13MAY2018 09:53:30  19.4N  154.9W mb=4.2  EMSC   HAWAII REGION, HAWAII

O: 13MAY2018 16:27:55  19.4N  155.2W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 03:55:14  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 08:41:19  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 10:59:35  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 18:57:45  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 19:18:50  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 06:08:35  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 14MAY2018 06:40:33  19.4N  155.3W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 20:40:17  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII     

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 CAAAA  Hawaii area                

 

The strongest earthquake in the world today was an M 5.3 in the Nicobar Islands, India. The last earthquake of M>=5.3 in the Nicobar Islands was an M 5.9 about 200 km north of today's epicenter on January 25, 2018. Forecast 116373 had expected today's activity in the Nicobar Islands was likely around May 9. This is located at 106 degrees from Hawaii and half that distance (51 degrees, node 7) from the PNG earthquake of M 7.5 of February 25 and was probably promoted from those sources.

 

O: 13MAY2018 18:46:06   7.5N   93.6E mb=4.9  EMSC   NICOBAR ISLANDS, INDIA REGION

O: 13MAY2018 18:20:58   7.6N   93.6E mb=5.3  EMSC   NICOBAR ISLANDS, INDIA REGION

P:  9MAY2018 116393     8.0N   93.0E 4.0-5.6 BAAAA  Nicobar Islands            

 

The series of earthquakes in northern Germany and the Czech Republic also continued today. This enhanced series included two events of M 3.7 today, the largest to date in this swarm. Forecast 116581 had expected this in early May.

Some of this activity was lightly felt in the epicentral area today. Previous swarms in this area suggest this may still see larger magnitudes before dying out.

 

O: 14MAY2018 00:52:56  50.3N   12.4E ML=3.1  EMSC   CZECH REPUBLIC

O: 14MAY2018 00:43:53  50.3N   12.5E ML=3.7  EMSC   CZECH REPUBLIC

O: 14MAY2018 01:54:34  50.3N   12.5E ML=3.7  EMSC   CZECH REPUBLIC

O: 13MAY2018 23:37:04  50.3N   12.4E ML=3.0  EMSC   CZECH REPUBLIC               

P:  5MAY2018 116581    50.0N   12.0E 3.0-4.6 CAAAA  No. Germany                

 

Two earthquakes of M 4.0 and 4.1 shook the region of Oklahoma today. This activity was expected in early May.  NEIC reported this earthquake of M 4.1 in Oklahoma was felt with intensity V in Mulhall and Hennessey; IV in Crescent, Guthrie, Perry and Stillwater, Oklahoma and II-III in the area(s) of Edmond, Coyle, Dover, Marshall, and in general within about 75 km of the epicenter.

Moderate earthquakes in Oklahoma often occur at times of new or full moon

alignments with the high associated tidal stresses. In recent months these

have coincided with the full moons of early March and April, the last of which

with M>=4 was an M 4.5 on April 9. Forecast 116521 had expected this activity in early May. These epicenters are located at the seventh node (52 degrees) from Hawaii and were probably promoted from that source.

 

O: 14MAY2018 05:02:54  36.1N   97.6W mb=2.4  EMSC   OKLAHOMA

O: 14MAY2018 03:16:06  36.1N   97.6W mb=2.5  EMSC   OKLAHOMA

O: 13MAY2018 23:28:48  36.1N   97.6W mb=4.0  EMSC   OKLAHOMA

O: 14MAY2018 07:25:00  36.1N   97.6W Mw=4.1  EMSC   OKLAHOMA                     

P:  4MAY2018 116521    37.0N   97.0W 2.0-4.1 CAAAA  Southern Plains            

 

The swarm of events in Ocotillo, California also continued today with the largest event of M 3.2 and 3.5. This does not appear to be expanding but may continue for another day of two at the current rate. Earthquakes of M 3-3.5 were reported felt lightly in Imperial, Indio and Cathedral City among other localities. Forecast 116508 had expected this activity within about 30 km was likely around May 9.

 

O: 13MAY2018 14:27:29  33.0N  115.9W ML=2.0  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 14:46:57  33.0N  115.9W ML=2.0  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 14:40:16  33.0N  115.9W ML=2.1  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 15:51:12  33.0N  115.9W ML=2.3  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 12:20:22  33.1N  115.9W ML=2.0  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 12:21:23  33.1N  115.9W ML=2.1  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 22:11:56  33.1N  115.9W ML=2.2  EMSC   SOUTHERN CALIFORNIA

O: 14MAY2018 01:14:47  33.1N  115.9W ML=2.3  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 12:29:42  33.1N  115.9W ML=2.4  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 11:43:18  33.1N  115.9W ML=2.5  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 11:34:45  33.1N  115.9W ML=2.7  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 14:33:23  33.1N  115.9W ML=3.2  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 12:05:47  33.1N  115.9W ML=3.5  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 12:14:31  33.0N  115.9W ML=2.0  EMSC   SOUTHERN CALIFORNIA          

P:  9MAY2018 116508    32.8N  116.0W 2.5-4.5 BAAAA  So. California             

 

An earthquake of M 5.1 in the Southwest Indian Ridge occurred today near the antipode of the swarm in southern California and may help promote further activity in that area. Forecast 116633 had expected this activity around May 5. This epicenter is located at 146 degrees from Hawaii and also from the M 8.0 in the Alaska Gulf and may have been promoted by the activity in that area. Seismic energy is concentrated on the surface at this distance and may help promoted zonal seismicity.

 

O: 13MAY2018 22:27:29  29.5S   60.8E mb=5.1  EMSC   SOUTHWEST INDIAN RIDGE       

P:  5MAY2018 116633    29.0S   62.0E 4.0-5.5 CAAAA  So. Indian Ocean           

 

SWARM IN SOUTHERN CALIFORNIA COULD EXPAND

 

EARTHQUAKE SUMMARY FOR MAY 12, 2018

 

A swarm of light earthquakes with magnitude up to M 3.5 hit the region of Southern California north of Baja today. The largest of these were reported by NEIC to have been felt in Imperial, El Centro, Heber, La Quinta, California and in general within about 75 km of the epicenters. NEIC reported an aftershock of M 3.1 in Southern California was felt with intensity II-III in the area(s) of Loma Linda, Colton, Redlands, Moreno Valley, Grand Terrace, San Bernardino, Highland, Riverside, California. These earthquakes are located at 103 degrees from the epicenter of the M 7.6 in Papua New Guinea, a distance at which seismic energy is concentrated at the surface after reflecting off the core mantle boundary and returning to the surface. The last event of M>=3.5 within about 50 km of these events was an M 3.5 on September 13, 2017. An M 4.0 with aftershocks of M 3.6 and 3.5 occurred about 60 km to the west of today's epicenter on December 7, 2017. Forecast 116508 had expected this activity within about 25 km of these events was likely around May 9. Swarms of this type in Southern California often increase and contain one or more moderate earthquake within several days of the swarm beginning.

 

O: 12MAY2018 08:53:05  32.8N  115.5W ML=2.1  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 00:52:31  33.0N  115.9W ML=2.3  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 04:38:30  33.0N  115.9W ML=2.3  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 00:37:11  33.0N  115.9W ML=3.1  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 00:48:06  33.0N  115.9W ML=3.3  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 00:34:57  33.0N  115.9W ML=3.5  EMSC   SOUTHERN CALIFORNIA

O: 13MAY2018 00:28:56  33.1N  115.9W ML=3.4  EMSC   SOUTHERN CALIFORNIA           

P:  9MAY2018 116508    32.8N  116.0W 2.5-4.5 BAAAA  So. California             

 

A new vent in the Hawaiian eruption opened up east of the current eruption today. Within hours, the vent had erupted lava up to 40 feet high and 150 feet long with chunks of magma being sent up to 30 meters into the air. This is the 16th new vent in the eruption which is quickly draining lava from the Kilauea lava lake. When the lava lake reaches ground water levels, it is likely that the eruption will enter a new, explosive stage. Much of today's larger activity was not at the Leilani Estates area but in the Kilauea crater about 30 km to the west with maximum M 3.5 there today. This is where the next phase may begin. An unusual earthquake southwest of Hawaii yesterday suggested the eruption is having unexpected consequences. The largest earthquake in the area today was an M 4.2. While at no current danger, concern has been expressed in the media that the eruption in Hawaii could trigger fresh volcanism in northern California (Lassen) north through Washington. A major earthquake in Hawaii could change some of the plumbing in this volcanic zone and pressure magma and water into pre-existing cracks, igniting a fresh round of volcanism in this area of the U.S. northwest states.

 

NEIC reported an earthquake of M 4.2 in Hawaii was felt with intensity II-III in the area(s) of Pahoa, Mountain View, Kurtistown, Volcano, Keaau, Hawaii National Park, Hilo, Papaikou, Pepeekeo, Laupahoehoe, Ookala, Naalehu, Captain Cook, and Honokaa, Hawaii.

 

O: 13MAY2018 03:08:48  19.4N  154.8W ML=3.2  EMSC   HAWAII REGION, HAWAII

O: 12MAY2018 18:06:47  19.4N  155.0W ML=3.2  EMSC   HAWAII REGION, HAWAII

O: 12MAY2018 07:25:01  19.4N  155.0W ML=4.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 12MAY2018 09:15:24  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 12MAY2018 20:24:40  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 12MAY2018 22:18:24  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 13MAY2018 07:12:19  19.4N  155.3W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 12MAY2018 23:36:29  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 12MAY2018 23:12:59  19.5N  154.9W Ml=3.0  EMSC   HAWAII REGION, HAWAII

O: 12MAY2018 07:25:01  19.4N  155.0W ml=4.2  ANSS   Leilani Estates Hawaii

O: 13MAY2018 07:22:14  19.3N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII     

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 CAAAA  Hawaii area                

 

The strongest earthquake in the U.S. or Canada today was an M 4.3 in Unimak Island area of Alaska. A series of moderate quakes hit the Unimak Island area between April 16-25, 2018 with M 4.3-4.7. The last, and only, such event of M>=5 in the past half year was an M 5.1 on February 27, 2018. Forecast 116590 had expected today's earthquake was likely around May 11.

 

O: 12MAY2018 11:42:14  53.9N  163.6W ML=4.3  EMSC   UNIMAK ISLAND REGION, ALASKA 

P: 11MAY2018 116590    52.5N  163.7W 3.5-5.2 ABAAA  Unimak Islands, Aleutians  

 

The most unusual earthquake in the world today occurred in the East Africa Rift Valley with M 4.6 in the Mayotte region. It was not reported felt in the area.

The last earthquake of M>=4.6 within about 200 km of this epicenter occurred on September 21, 2016 with M 5.0 and prior to that on October 1, 2015. Forecast 116618 expected seismicity south of this was likely around May 10. This epicenter is near the antipode of Tropical Depression 01E, noted in previous issues as below,  which has been active in the northeastern Pacific over the past several days and may have been promoted from this storm.

 

"TD    01E      2018-05-11  00:00 UT  12.5N  127.2W   40 kts  Eastern Pacific

TD 01E continued today west of Mexico with winds up to 40 kts. It is expected to track to the west and not to encounter land while weakening. It may continue to the west and reach Hawaii enhancing the current eruption there, but this is unlikely." (May 11-12, 2018)

 

O: 13MAY2018 04:28:02  13.0S   45.3E mb=4.6  EMSC   MAYOTTE REGION               

P: 10MAY2018 116618    18.0S   42.0E 3.0-4.4 BCAAA  Madagascar area            

 

 

 

UNUSUAL SEISMICITY BUT NO LARGE QUAKES

 

EARTHQUAKE SUMMARY FOR MAY 11, 2018

 

Seismicity today was dominated by unusual events in the Arctic Ocean (M 4.1); the Alaska Peninsula (M 5.2), in Baja and southern California and southeast of the island of Hawaii (M 3.6). Some of this suggest influence by the volcanic eruption in Hawaii while others may have been promoted by the ending of the current geomagnetic storm. Much of today's activity may have been promoted from recent strong earthquakes as it occurred around 103 degrees from these events. Today's quakes in Xinjiang, China (M 4.4) was at 104 degrees from Hawaii; that in southern California was at 103 degrees from PNG; two events of M 4.1 and 4.6 in South Island, New Zealand and an M 4.4 in Java were at 103 degrees from the Gulf of Alaska; the M 4.1 in the Arctic Ocean was at 105 degrees from Bolivia.

 

An unusual earthquake of M 4.1 occurred in the Arctic Ocean north of Canada today. This is a remote oceanic area and this earthquake was not reported felt in the area. The last earthquake within about 200 km of this epicenter with M>=4.1 occurred as an M 4.9 on November 21, 2009 to the southeast of this epicenter. A series of earthquakes about 250 km south of today's event hit the region in October and November, 2008. Forecast 116615 had expected today's event within this area was likely in early May.

 

 

O: 12MAY2018 04:31:37  81.6N  114.6W mb=4.1  EMSC   ARCTIC OCEAN                 

P:  6MAY2018 116615    80.0N  116.0W 4.0-5.8 CBAAA  Arctic Ocean Region         

 

The strongest earthquake in the U.S. or Canada today was an M 5.2 in the Alaska Peninsula. NEIC reported this earthquake of M 5.1 in the Alaska Peninsula was felt with intensity II-III in the area(s) of Kodiak, King Salmon, South Naknek, Homer, Anchorage, Alaska. The last earthquake with M>=5.2 within about 200 km of

this epicenter occurred on August 31, 2017 (M 5.4) and prior to that on May 11, 2017 (M 5.2). Forecast 116568 had expected today's event in the Alaska Peninsula was most likely around May 10.

 

O: 11MAY2018 04:58:23  57.6N  155.8W mb=5.2  EMSC   ALASKA PENINSULA             

P: 10MAY2018 116568    54.7N  156.9W 3.5-5.2 ACAAA  Alaska Peninsula           

 

The most active area of California today was the area of Southern and Baja California where an M 3.0 occurred. No damage occurred. This area is expected to see continued elevated seismicity with a possible minor swarm in the next several days corresponding with the end of the current geomagnetic storm.

 

O: 11MAY2018 09:51:09  31.7N  115.0W ML=3.0  EMSC   BAJA CALIFORNIA, MEXICO      

O: 11MAY2018 07:17:41  32.2N  116.6W ML=2.4  EMSC   BAJA CALIFORNIA, MEXICO      

O: 12MAY2018 03:29:23  32.8N  115.5W ML=2.0  EMSC   SOUTHERN CALIFORNIA          

P:  9MAY2018 116508    32.8N  116.0W 2.5-4.5 BAAAA  So. California             

 

Seismicity continued in the region of Hawaii today with volcanism-related seismicity non-stop. An unusual M 3.6 southwest of the island of Hawaii suggested regional seismicity is about to move to a higher level. The M 3.6 occurred in an area where previous seismicity had been very rare and is probably related to the new eruption. The last earthquake within about 50 km of  today's epicenter southwest of Hawaii with M>3.6 was an M 3.8 on May 23, 2012 and an M 3.8 on September 5, 2003. The only other such earthquake in this area in the past 25 years was an M 4.0 on August 19, 1991. NEIC reported an earthquake of M 3.4 in Hawaii was felt with intensity II-III in the area(s) of Volcano, Hawaii.

 

O: 11MAY2018 20:10:03  18.8N  156.8W ML=3.6  EMSC   HAWAII REGION, HAWAII        

O: 11MAY2018 09:24:32  19.5N  154.9W Ml=3.0  EMSC   HAWAII REGION, HAWAII        

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 CAAAA  Hawaii area                

 

The activity in the Czech Republic continued today and was slightly larger than previous days with earthquakes of M 3.0 and 3.2, possibly felt in this region along the border of northern Germany. Forecast 116581 had expected this activity within about 30 km of these epicenters was likely around May 5.

 

O: 11MAY2018 18:27:53  50.3N   12.4E ML=3.0  EMSC   CZECH REPUBLIC               

O: 11MAY2018 19:38:55  50.3N   12.4E ML=3.2  EMSC   CZECH REPUBLIC               

P:  5MAY2018 116581    50.0N   12.0E 3.0-4.6 CAAAA  No. Germany                

 

Seismicity in central Asia was down today. The largest earthquake in the area was an M 4.4 in Southern Xinjiang, China. It was not immediately reported felt but may have been felt lightly in the epicentral area. This epicenter is at 104 degrees from the M 6.9 in Hawaii of May 4 and may have been promoted from that source. Forecast 116543 had expected activity in this area around May 11.

 

O: 11MAY2018 14:14:35  39.9N   75.8E mb=4.4  EMSC   SOUTHERN XINJIANG, CHINA     

P: 11MAY2018 116543    40.0N   78.0E 4.0-5.4 BAAAA  Kirgizstan/Xinjiang        

 

Seismicity near 103 degrees from Hawaii also continued today in the northern Mid-Atlantic with events of M 4.7 and 5.1. This area became active following the M 6.9 in Hawaii and is likely to continued to see moderate volcanic-related seismicity in the next several weeks. Forecast 116456 had expected this activity was likely around May 5.

 

O: 12MAY2018 02:26:39  27.2N   44.4W mb=4.7  EMSC   NORTHERN MID-ATLANTIC RIDGE  

O: 12MAY2018 02:35:03  27.3N   44.3W mb=5.1  EMSC   NORTHERN MID-ATLANTIC RIDGE  

P:  5MAY2018 116456    29.0N   43.0W 4.0-5.4 CBAAA  Mid-Atlantic Ridge         

 

GEOMAGNETIC STORM PROMOTES SEISMICITY IN INDONESIA AND PHILIPPINES

 

EARTHQUAKE SUMMARY FOR MAY 10, 2018

 

A moderately strong earthquake of M 5.6-5.9 hit northern Mindanao today. NEIC reported it was felt with intensity VI in Madrid, Caraga, Philippines and V in Cagdianao and San Policarpio, Eastern Visayas. Lesser shaking was felt up to 300 km from the epicenter at Davao, Little Baguio, Barra, Calero, Cebu, Tago, Valencia, Bohol, Palo, General MacArthur, Baras, Salcedo, Lawaan, Purok, Hilongos, Sison, Brasilisa, San Francisco and San Juan, Eastern Visayas, Philippines. PHIVOLCS reported it was felt with intensity V in Libjo, Dinagat Islands, Surigao Del Norte, Surigao City; Guiuan, Mercedes and Calcedo; in Eastern Samar at San Jose, Basilisa Tubajon, Loreto, Cagdianao and Dinagat, Dinagat Islands; IV in Carrascal and Cantilan, Surigao Del Sur; Lawaan Giporlos, General Macarthur, Llorente, Maydolong and San Julian, Eastern Samar; Butuan City, San Francisco, San Juan, Liloan and Hinunangan, Southern Leyte, Tolosa, Leyte, Tolosa, Leyte, Placer, Del Carmen and Mainit, Surigao Del Norte, Rosario, Agusan del Sur; intensity III in Baybay City, Dulag, Palo and Pastrana, Leyte, Borongan and Dolores, in eastern Samar at Gingoog Misamis Oriental, Maasinand Sogod, Southern Leyte, Tacloban City, San Miguel, Surigao Del Sur, Iligan City, Burgos, Surigao Del Norte; Intensity II in Hinatuan, Surigao Del Sur, Cagayan de Oro City, Oras, Eastern Samar Mambajao Camiguin and I in Dumaguete, Negros Oriental; Bislig City, Philippines. Several other earthquake of moderately large magnitudes also hit regions of the Philippines today including an M 5.9 in central Mindanao. This event was at a deep focus and was not reported felt. These follow strong seismicity in the region over the past two days. This is near the geomagnetic equator and was probably promoted by the current geomagnetic storm as suggested in the previous issue of this summary:

 

 

"Moderately large earthquakes about 10-15 degrees from the geomagnetic equator also occurred today in the Sunda Strait, Indonesia (M 5.4-5.7) and in the northern Mariana Islands. These too, were probably promoted from the current geomagnetic storm." (May 10, 2018)

 

 

"The geomagnetic field saw active conditions today. The AP level was 16. High latitude geomagnetic field saw minor storms  with AP at 29. The current storm began around 20:00 UT and reached maximum early on May 6. Generally quiet seismic conditions outside Hawaii will probably show enhancement in the next day and around May 9-11 near the geomagnetic equator and at high latitudes. This may include continued high levels in the Hawaii eruption." (May 5-9, 2018)

 

The last earthquake with M>=5.7 within about 200 km of the Leyte, Philippines event occurred with M 5.8 on July 10, 2017 and prior to that as an M 6.5 on July 6, 2017. Forecasts 116433 and 116368 had expected this activity in this area in early May.

 

O: 10MAY2018 11:56:58  10.2N  125.6E mb=5.7  EMSC   LEYTE, PHILIPPINES           

O: 10MAY2018 11:56:59  10.1N  125.5E MS=5.7  PHI  Felt with intensity V

P:  2MAY2018 116433    10.0N  126.0E 3.5-5.1 CAAAA  Luzon, Philippines         

P: 10MAY2018 116389     9.0N  127.0E 4.0-5.4 ABAAA  Halmahera                  

 

The last earthquake of M>=5.9 in the Moro Gulf, Mindanao, Philippines within about 200 km of today's epicenter occurred on April 28, 2017 more than a year ago with M 6.9 and prior to that an M 6.6 on December 2, 2014. A new tropical cyclone is forming east of Guam and may be enhancing magnitudes in this area.

Forecast 116384 had expected this event was likely within about 150 km of today's epicenter around May 11.

 

O: 10MAY2018 18:02:29   6.9N  123.9E Mw=5.9  EMSC   MORO GULF, MINDANAO, PHILIPPIN

O: 10MAY2018 18:02:28  06.7N  124.1E MS=5.9  PHI  Not reported felt by PHIVOLCS.

P: 11MAY2018 116384     8.0N  125.0E 4.0-5.4 ABAAA  Central Philippines        

P:  8MAY2018 116384     7.0N  126.0E 4.0-5.4 AAAAA  Central Philippines        

 

NEIC reported the earthquake of M 5.3 in the Molucca Sea Indonesia was felt with intensity II-III in the area(s) of Manado, Indonesia.  BMG reported it was felt with intensity III-IV in Bitung and III in Manado, Celebes, Indonesia.

 

O: 10MAY2018 08:39:53   1.0N  126.1E mb=5.4  EMSC   MOLUCCA SEA                  

O: 10MAY2018 08:39:51  00.9N  126.2E MS=5.2  BMG  Felt with intensity III-IV

O: 10MAY2018 11:37:16   1.0N  126.2E mb=4.6  EMSC   MOLUCCA SEA                  

 

 

Light earthquakes continued in the eruption in eastern Hawaii today. These were reported by NEIC to have been felt in Pahoa, Keaau, Mountain View, Pepeekeo and Hilo, Hawaii. The largest of these was an M 4.2 near the Leilani Estates. NEIC reported it was felt with intensity IV in Pahoa and II-III in Honolulu, Paauilo, Hakalau, Pepeekeo, Papaikou, Hilo, Hawaii National Park, Volcano, Keaau, Mountain View and Kurtistown, Hawaii. The magnitude of an associated earthquake when Kilauea "blows its top" could exceed M 8.0. This has not happened in nearly one hundred years.

 

O: 10MAY2018 10:38:45  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

O: 10MAY2018 07:45:11  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII     

O: 10MAY2018 17:26:23  19.5N  154.9W Ml=3.0  EMSC   HAWAII REGION, HAWAII        

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 AAAAA  Hawaii area                 

 

The strongest earthquake in the U.S. or Canada today was an M 5.2 in the Alaska Peninsula. It was not reported felt in this remote but is large enough to have been felt over several hundred km. The last earthquake with M>=5.2 within about 200 km of this epicenter occurred on August 31, 2017 (M 5.4) and prior to that on May 11, 2017 (M 5.2). Forecast 116568 had expected today's event in the Alaska Peninsula was most likely around May 10.

 

O: 11MAY2018 04:58:23  57.6N  155.8W mb=5.2  EMSC   ALASKA PENINSULA             

P: 10MAY2018 116568    54.7N  156.9W 3.5-5.2 ACAAA  Alaska Peninsula           

 

A strong series of light earthquakes occurred on the border between the Czech Republic and northern Germany. Dozens of events of M>=2 were recorded in this swarm. None were reported widely felt or damaging,, however. The last earthquake with M>=3 within about 100 km of this epicenter occurred on May 31, 2014 (M 4.3). A similar swarm hit the region in October, 2008 and lasted nearly three weeks. Today's events are probably mining-related or rockbursts. Forecast 116581 had expected today's activity within about 30 km of these epicenters was likely in early May. Like the M 6.2 in Hindu Kush, Afghanistan yesterday, these events are located at 106-108 degrees from Hawaii and may have been promoted from that source.

 

O: 11MAY2018 03:29:48  50.3N   12.4E ML=2.1  EMSC   CZECH REPUBLIC

O: 11MAY2018 07:03:09  50.3N   12.4E ML=2.2  EMSC   CZECH REPUBLIC

O: 10MAY2018 23:25:06  50.3N   12.4E ML=2.3  EMSC   CZECH REPUBLIC

O: 10MAY2018 22:24:51  50.3N   12.4E ML=2.4  EMSC   CZECH REPUBLIC

O: 10MAY2018 23:22:56  50.3N   12.4E ML=2.4  EMSC   CZECH REPUBLIC

O: 11MAY2018 03:31:37  50.3N   12.4E ML=2.4  EMSC   CZECH REPUBLIC

O: 11MAY2018 06:37:02  50.3N   12.4E ML=2.4  EMSC   CZECH REPUBLIC

O: 11MAY2018 06:58:43  50.3N   12.4E ML=2.4  EMSC   CZECH REPUBLIC

O: 10MAY2018 20:41:05  50.3N   12.4E ML=2.5  EMSC   CZECH REPUBLIC

O: 11MAY2018 03:07:36  50.3N   12.4E ML=2.5  EMSC   CZECH REPUBLIC

O: 10MAY2018 14:47:37  50.3N   12.4E ML=2.6  EMSC   CZECH REPUBLIC

O: 10MAY2018 20:45:01  50.3N   12.4E ML=2.9  EMSC   CZECH REPUBLIC

O: 11MAY2018 02:58:51  50.3N   12.5E ML=2.0  EMSC   CZECH REPUBLIC

O: 11MAY2018 06:26:08  50.3N   12.5E ML=2.1  EMSC   CZECH REPUBLIC

O: 11MAY2018 06:35:45  50.3N   12.5E ML=2.2  EMSC   CZECH REPUBLIC

O: 11MAY2018 03:10:29  50.3N   12.5E ML=2.3  EMSC   CZECH REPUBLIC

O: 10MAY2018 23:11:40  50.3N   12.5E ML=2.8  EMSC   CZECH REPUBLIC

O: 10MAY2018 14:24:49  50.3N   12.5E ML=3.0  EMSC   CZECH REPUBLIC

O: 10MAY2018 20:24:14  50.2N   12.4E ML=2.7  EMSC   CZECH REPUBLIC               

P:  5MAY2018 116581    50.0N   12.0E 3.0-4.6 AAAAA  No. Germany                

 

Seismicity also continued today in central Asia where moderate quake occurred in

Iran, Turkmenistan and Xizang, China. The most unusual of these was an M 4.2 in Western Xizang. The last earthquake of M>=4.2 within about 200 km of today's epicenter was an M 4.9 on December 8, 2017. Forecast 116531 expected activity in Xizang around May 8. This epicenter is located at 103 degrees from the M 6.9 in Hawaii of May 4, a distance at which seismic energy is concentrated at the surface and this quake was probably promoted from Hawaii.

 

O: 10MAY2018 20:02:04  28.3N   87.6E mb=4.2  EMSC   WESTERN XIZANG               

P:  8MAY2018 116531    31.0N   88.0E 3.8-5.3 ACAAA  Xizang                     

 

O: 10MAY2018 15:36:42  36.4N   61.2E mb=4.8  EMSC   TURKMENISTAN                 

P:  9MAY2018 116497    37.0N   59.0E 3.8-5.4 AABAA  No. Iran                   

 

O: 10MAY2018 14:08:36  36.6N   71.2E mb=4.9  EMSC   HINDU KUSH REGION, AFGHANISTAN

P:  7MAY2018 116486    36.0N   70.0E 3.8-5.8 BAAAA  Hindu Kush/Pakistan        

 

STRONG EARTHQUAKE SHAKES CENTRAL ASIA

 

EARTHQUAKE SUMMARY FOR MAY 9, 2018

 

An earthquake of M 6.2 occurred today at an intermediate depth under Hindu Kush, Afghanistan. This was part of an activation of the region as discussed in previous issues of this summary. This appears to be related to the strong M 6.9 in Hawaii of May 4 as it occurred at a distance of 108 degrees from that quake. The region is in the distance zone (103-110 degrees) from Hawaii, a  distance at which seismic energy is concentrated on the surface after reflecting off the core-mantle boundary. In the previous issue of this report it was noted:

 

 

"Earthquakes at 103-104 degrees from Hawaii also continued in central Asia with events in Tajikistan, Kyrgyzstan, China and Afghanistan today were in this region." (May 7-8, 2018

 

and on May 6:

 

"One region which lies at about 103 degrees from Hawaii in the area of central Asia in Tajikistan, Kyrgyzstan, and western China. This area has shown increased seismicity since the M 6.9 in Hawaii and this activity continued today. The events in Kazakhstan, Kyrgyzstan, Tajikistan and Western Xizang occurred between 100 and 108 degrees from Hawaii and were probably promoted by the M 6.9 there. Seismic energy concentrates on the surface after major earthquakes because it is reflected and refracted to this distance of 100-108 degrees off the core-mantle boundary. This is often followed by strong seismic enhancement in this distance zone. In addition to the activity in central Asia events of M 4.5 occurred in Sumatra today at 104 degrees from Hawaii .." (May 5-6, 2018)

 

The M 6.2 in Hindu Kush today was reported by NEIC to have been felt with intensity IV-V within about 300 km of the epicenter. These reports came from Afghanistan at Faizabad, Nahraine, Qunduz, Mahmoud Raqui, Jalal Abad, Carikar, Qara Bagh, Baghrami, Kabul, Baraki Barak, Gardayz. It was also felt in Pakistan, Tajikistan, India, Uzbekistan, and as far as 1000 km from the epicenter.

 

Hindu Kush is about 15 degrees north of the geomagnetic equator and was probably also promoted from the current geomagnetic storm, the strongest in more than  a month. This summary had noted this storm in previous issues as:

 

"The geomagnetic field saw active conditions today. The AP level was 16. High latitude geomagnetic field sae minor storms  with AP at 29. The current storm began around 20:00 UT and reached maximum early on May 6. Generally quiet seismic conditions outside Hawaii will probably show enhancement in the next day and around May 9-11 near the geomagnetic equator and at high latitudes. This may include continued high levels in the Hawaii eruption." (May 5-9, 2018)

 

The last earthquake in the Hindu Kush area with M>=6.2 within about 200 km of today's epicenter occurred on April 10, 2016 with M 6.6 and prior to that  on December 25, 2016 (M 6.3).  Forecast 116586 expected today's event with  magnitude up to M 5.8 was likely in this region around May 7.

 

O:  9MAY2018 10:41:44  37.0N   71.4E Mw=6.2  EMSC   HINDU KUSH REGION, AFGHANISTAN

P:  7MAY2018 116486    36.0N   70.0E 3.8-5.8 AAAAA  Hindu Kush/Pakistan        

 

An earthquake of M 6.0 also occurred about 10 degrees south of the Geomagnetic equator in the New Britain/Ireland area. This is a region which often sees enhanced seismicity with geomagnetic storms. This event was not reported felt. A series of strong earthquakes hit the New Britain region from March 24-29 including a major M 7.0. Today's earthquake is the strongest aftershock in the area since late March. Forecast 116404 had expected today's event in New Britain was likely around May 9.

 

O:  9MAY2018 07:57:54   5.9S  151.8E Mw=6.0  EMSC   NEW BRITAIN REGION, P.N.G.   

P:  9MAY2018 116404     5.0S  154.0E 4.0-5.7 AABAA  New Britain                

 

Moderately large earthquakes about 10-15 degrees from the geomagnetic equator also occurred today in the Sunda Strait, Indonesia (M 5.4-5.7) and in the northern Mariana Islands. These too, were probably promoted from the current geomagnetic storm.  BMG reported the Sunda Strait event was felt with intensity III-IV in Tanggamus; II-III in Liwa, Krui, Bandar Lampung and I-II in Nanggung Kab Bogor, Pesawaran, Indonesia. NEIC reported this earthquake of M 5.5 in Sunda Strait of Indonesia  was felt with intensity II-III in the area(s) of Manado, Sulawesi, Indonesia. The last earthquake within about 200 km of this epicenter with M>=5.7 occurred May 2, 2016 with M 5.9. Forecast 116414 had expected this event was likely within about 100 km of the epicenter around May 11. Like the event in Hindu Kush, this epicenter is at 102 degreed from the Hawaii M 6.9 and was probably promoted from that source.

 

O:  9MAY2018 21:26:00   6.2S  105.0E mb=5.4  EMSC   SUNDA STRAIT, INDONESIA      

O: 09MAY2018 21:25:56  06.6S  104.8E MS=5.7  BMG  Felt with intensity III-IV

P: 11MAY2018 116414     7.0S  104.0E 4.0-5.4 AAAAA  So. of Sumatera            

 

The M 5.5 in the Rota Region of the northern Mariana Islands was widely felt in that area and in Guam. NEIC reported this earthquake of M 5.3-5.5 in the Mariana Islands was felt with intensity IV in Mangilo, Guam and II-III in the area(s) of Garapan, Saipan, Tinian and Rota, Marianas and in Guam at Umatac, Merizo, Inarajan, Santa Rita, Talofofo, Piti, Asan (IV), Barrigada, Tamuning, Dededo, Mangilao (IV). The last event of M>=5.5 within about 100 km of this epicenter occurred November 15, 2017 with M 5.8 in Guam. The last in the Northern Mariana Islands was an M 5.5 on September 2, 2017. Forecast 116447 had expected this event in early May.

 

O:  9MAY2018 21:02:42  14.0N  145.7E mb=5.5  EMSC   ROTA REGION, N. MARIANA ISLAND

P:  3MAY2018 116447    14.0N  145.0E 4.0-5.4 CAAAA  So. Marianas/Guam          

 

Earthquakes and volcanism continued at high levels in Hawaii today. Minor quakes continued to be felt in the Volcano, Hilo and Pahoa regions of Hawaii. Activity under Kilauea suggested a major explosive eruption at that volcano may occur in the current eruption. As the magma in Kilauea drains in the eruption, the level in Kilauea reached the water table. This can trigger a strong steam eruption which could be of concern. The newest concerns are volcanic fog, lahars and acid rain which form when mudslides occur and when sulfur dioxide from the eruption combines with atmospheric moisture.

 

O:  9MAY2018 08:56:33  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

The strongest earthquake in the U.S. or Canada today was an M 4.9 in the Near Islands, Aleutians, Alaska. This is a remote area and this event was not reported felt. The last earthquake of M>=4.9 in the Near Islands within about 200 km of this epicenter was an M 5.1 occurred August 8, 2017. Forecast 116586 had expected today's event was likely around May 7.

 

O:  9MAY2018 15:00:16  52.3N  174.2E mb=4.9  EMSC   NEAR ISLANDS, ALEUTIAN ISLANDS

P:  7MAY2018 116586    52.0N  176.0E 4.0-5.6 AAAAA  Rat Islands                

 

An earthquake of M 4.0 in the Geysers, Northern California was widely felt today. An M 4.2 in the Geysers, California today was felt with intensity IV in Geyserville, Middletown and II-III in Cloverdale, Healdsburg, Hidden Valley Lake, Glenhaven, Lower Lake, Calistoga, Windsor, Lakeport, Pope Valley, Angwin, Santa Rosa, Sebastopol, Saint Helena, Kenwood, Glen Ellen, Napa, Yountville, Sonoma, San Rafael, Davis, Larkspur, California. NEIC reported the aftershock of M 2.7 in the California Geysers was felt with intensity IV at Kelseyville and II-III in the area(s) of Hidden Valley Lake and Napa, California. While earthquakes are a daily occurrence in this area of California, they seldom reach M>=4 levels. NEIC identified two earthquakes about a minute apart - with M 4.2 and 4.0. The last earthquake in the Geysers of M>=4 occurred on April 30, 2017 and the last of M>=4.2 on February 21, 2107. The last of M>4.2 in the Geysers area was an M 5.0 on December 14, 2016. Forecast 116481 had expected an event with magnitude up to M 4.7 in early May.

 

O: 10MAY2018 03:11:55  38.8N  122.7W MD=2.2  EMSC   NORTHERN CALIFORNIA

O: 09MAY2018 07:22:53  38.8N  122.8W MD=2.0  EMSC   NORTHERN CALIFORNIA

O: 09MAY2018 06:58:10  38.8N  122.8W MD=2.2  EMSC   NORTHERN CALIFORNIA

O: 09MAY2018 07:20:53  38.8N  122.8W MD=2.2  EMSC   NORTHERN CALIFORNIA

O: 10MAY2018 03:01:27  38.8N  122.8W MD=2.2  EMSC   NORTHERN CALIFORNIA

O: 10MAY2018 03:33:10  38.8N  122.8W MD=2.5  EMSC   NORTHERN CALIFORNIA

O: 10MAY2018 04:04:25  38.8N  122.8W MD=2.6  EMSC   NORTHERN CALIFORNIA

O: 10MAY2018 02:59:27  38.8N  122.8W Mw=4.0  EMSC   NORTHERN CALIFORNIA          

P:  4MAY2018 116481    38.7N  122.7W 2.5-4.7 CAAAA  Central California         

 

 

 

 

 


 

  

EARTHQUAKES IN PAKISTAN, AFGHANISTAN WIDELY FELT

 

EARTHQUAKE SUMMARY FOR MAY 8, 2018

 

Seismicity in Central Asia continued today at elevated levels. This is probably due to its distance (around 103 degrees) from the M 6.9 in Hawaii of May 4. This summary has previously emphasized this as a potential area for a large earthquake at this time as in the previous issue:

 

"Earthquakes at 103-104 degrees from Hawaii also continued in central Asia with events in Tajikistan, Kyrgyzstan, China and Afghanistan today were in this region." (May 7-8, 2018

 

and on May 6:

 

"One region which lies at about 103 degrees from Hawaii in the area of central Asia in Tajikistan, Kyrgyzstan, and western China. This area has shown increased seismicity since the M 6.9 in Hawaii and this activity continued today. The events in Kazakhstan, Kyrgyzstan, Tajikistan and Western Xizang occurred between 100 and 108 degrees from Hawaii and were probably promoted by the M 6.9 there. Seismic energy concentrates on the surface after major earthquakes because it is reflected and refracted to this distance of 100-108 degrees off the core-mantle boundary. This is often followed by strong seismic enhancement in this distance zone. In addition to the activity in central Asia events of M 4.5 occurred in Sumatra today at 104 degrees from Hawaii .." (May 5-6, 2018)

 

The strongest activity in the region today occurred in Afghanistan (M 4.9) and in Pakistan (M 5.1). An M 4.6 also occurred in eastern Sichuan, China in this activation of the region. The last earthquake within about 250 km of the event in  Pakistan was an M 5.5 on April 24, 2013. An M 5.5 hit about 500 km southwest of today's epicenter on May 13, 2016. Forecast 116504 expected this activity around May 11.

 

NEIC reported this earthquake of M 5.1 in Pakistan was felt with intensity IV in Pakistan at Peshawar, Nowshera, Attock, Punjab, Rawalpindi, and II-III in the area(s) of Abottabad, Islamabad, and in Afghanistan at Mahmoud Raqui, Kabul, Jalal Abad.

 

O:  8MAY2018 18:17:55  32.9N   68.7E mb=4.9  EMSC   CENTRAL AFGHANISTAN          

O:  9MAY2018 03:23:30  33.3N   70.5E Mw=5.1  EMSC   PAKISTAN                     

P: 11MAY2018 116504    30.0N   70.0E 3.8-5.2 ACAAA  Pakistan                   

 

O:  8MAY2018 18:27:34  28.0N   57.7E mb=4.6  EMSC   SOUTHERN IRAN                

P:  4MAY2018 116461    27.0N   55.0E 3.5-5.2 BABAA  So. Iran/Persian Gulf      

 

NEIC reported the earthquake of M 4.7 in Sichuan, China was felt with intensity II-III in the area(s) of Leshan, Sichuan, China.  Forecast 116458 had expected this event within about 150 km of the epicenter was likely around May 6.

 

O:  8MAY2018 15:11:34  28.2N  103.6E mb=4.6  EMSC   EASTERN SICHUAN, CHINA       

P:  6MAY2018 116458    27.0N  104.0E 4.0-5.4 ABAAA  Myanmar                    

 

An earthquake of M 4.7 in Sumatra, Indonesia also occurred today at 106 degrees from Hawaii. It is likely part of the regional activation which is being expressed in Asia at this time.

 

O:  8MAY2018 17:14:13   2.2N   96.7E mb=4.7  EMSC   SIMEULUE, INDONESIA           

P:  8MAY2018 116392     3.0N   94.0E 4.0-5.5 AACAA  Nicobar Islands            

 

A light earthquake on the Ontario, Canada - New York border was lightly felt in the region today. A similar M 2.4-2.5 event hit the region on July 11, 2017 but the last event of significantly larger magnitude within about 100 km of this epicenter was an M 2.9 on February 13, 2014. Forecast 116549 expected activity

in this area around May 10.

 

Earthquakes Canada reported this earthquake of M 2.8 in Ontario was felt with intensity II-III in the epicentral area.

 

O:  8MAY2018 21:27:40  43.7N   79.0W ML=2.3  EMSC   NEW YORK                     

O: 08MAY2018 21:27:39  43.7N   78.9W mb=2.4  ANSS   SSE of Ajax Canada

P: 10MAY2018 116549    43.0N   77.0W 2.0-4.4 AABAA  New York State             

 

U.S. WEST COAST EXPERIENCES UNUSUAL HAWAII-RELATED SEISMICITY

 

EARTHQUAKE SUMMARY FOR MAY 7, 2018

 

Moderate, unusual earthquakes occurred today in the region of Southern California east of Los Angeles with M 4.5; a similar M 4.5 off the northern Coast of California and in the Gulf of Alaska of M 5.5. These two epicenters, as well as an M 4.5 in the Rat Islands, western Aleutians, Alaska,  are the same distance (36.9 degrees) from the M 6.9 in Hawaii of May 4. This is near the 10th node from that event and these were probably promoted by energy from the Hawaii activity.

 

A moderate earthquake of M 4.5 in southern California east of Los Angeles occurred today. NEIC reported the mainshock was widely felt within about 100 km of the epicenter. Intensity V was reported from Angelus Oaks and San Bernardino with IV shaking at Banning, Forest Falls, Yucaipa, Beaumont, Calimesa, Big Bear City, Redlands, Moreno Valley, Highland, Running Springs, Hemet, Perris, Loma Linda, Desert Hot Springs, Grand Terrace, Winchester, Riverside and in general with intensity II-III within about 100 km of the epicenter. An aftershock of M 3.2 was reported felt with intensity IV in San Bernardino and II-III in Redlands, Rancho Mirage, Riverside, Sun City, Palm Desert and Menifee and in general within about 50 km of the epicenter. This is an epicenter at which a moderate earthquake had been expected in early 2018 in this summary. It is located at 102 degrees from the Papua New Guinea event of February 25, 2018, a distance at which concentrated seismic energy can help promote surface events. The last earthquake within about 100 km of this epicenter with M>=4.5 occurred June 10, 2016 with M 5.2 about 75 km to the southeast and prior to that on December 30, 2015 (M 4.6). No damage was reported with today's earthquakes.

Forecast 116509 had expected this event within about 15 km of the epicenter was likely around May 9.

 

O:  8MAY2018 11:51:53  34.0N  116.8W ML=3.2  EMSC   SOUTHERN CALIFORNIA          

O:  8MAY2018 11:49:33  34.0N  116.8W Mw=4.5  EMSC   SOUTHERN CALIFORNIA          

O:  7MAY2018 23:31:47  34.2N  116.9W ML=2.2  EMSC   SOUTHERN CALIFORNIA          

P:  9MAY2018 116509    33.9N  116.9W 2.5-4.8 AAAAA  So. California             

 

An M 4.5 off the coast of northern California also occurred today. NEIC reported this earthquake was felt with intensity II-III in California at Loleta, Eureka, Rio Dell, Arcata, McKinleyville, Kneeland, Crescent City, and possibly as far to the south as San Francisco, California. No damage was reported. The last earthquake off northern California within about 100 km of this epicenter with M>=4.6 occurred on July 29, 2017 with events of M 5.1 and 4.6 and prior to that an M 5.7 on September 3, 2016. Forecast 116552 had expected this event within about 50 km of this epicenter around May 9. This epicenter is at 33 degrees from Hawaii, near the 11th node and may have been promoted from that region.

 

O:  7MAY2018 23:51:03  40.7N  125.3W mb=4.6  EMSC   OFFSHORE NORTHERN CALIFORNIA 

P:  9MAY2018 116552    40.7N  124.6W 2.5-4.4 AAAAA  Off Coast of No. Calif     

 

The strongest earthquake in the U.S. or Canada today was an M 5.5 aftershock in the Gulf of Alaska. NEIC reported it was felt in Alaska at Cooper Landing and Soldotna both about 500 km to the north. This is the strongest aftershock of the M 8.0 in the Gulf of Alaska of January 23, 2018 since the immediate aftershocks of January 23 and 24, 2018 of M 5.6 and 5.5. Forecast 116569 had expected this earthquake was likely within about 50 km of the epicenter around May 7.

 

O:  8MAY2018 08:14:12  56.4N  148.4W Mw=5.5  EMSC   GULF OF ALASKA               

O:  7MAY2018 18:09:11  56.7N  149.3W mb=3.7  EMSC   GULF OF ALASKA               

P:  7MAY2018 116569    56.0N  148.7W 3.5-5.1 AAAAA  Gulf of Alaska             

 

Seismicity in Hawaii also continued today. A number of shocks of M>=3 in the area were felt lightly with intensity II-III in the areas of Hawaii National Park, Pahoa, Hilo, Kailua Kona, Waimanalo, Honolulu. Hawaii. More evacuations are expected in coming days as more volcanic vents are forming to increase the number past the current 12. There was a short lull in volcanic activity today. Residents were allowed to return quickly to retrieve valuables but some areas such as Lanipuna Gardens and Leilani Estates where volcanic gasses were a problem. Forecast 116453 had expected this activity in early May.

 

O: 08MAY2018 05:03:52  19.4N  154.9W Ml=3.3  EMSC   HAWAII REGION, HAWAII

O: 08MAY2018 01:01:39  19.4N  155.0W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 07MAY2018 08:28:20  19.4N  155.0W Ml=3.2  EMSC   HAWAII REGION, HAWAII

O: 08MAY2018 10:46:39  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08MAY2018 11:13:07  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 08MAY2018 10:39:41  19.4N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 08MAY2018 06:48:12  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O:  8MAY2018 09:05:12  19.1N  155.5W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII     

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

The strongest earthquake in the world today was a moderately large M 5.6 in the region of Vanuatu/New Caledonia/Loyalty Islands. It was not reported felt in this remote area. This is the strongest earthquake to occur within about 200 km of this epicenter since an 5.8 on November 25, 2017.  Forecast 116629 had expected this earthquake was likely to occur within this distance around May 8. This unusual epicenter is located at 51.4 degrees (node 7) from the epicenter of the M 6.9 in Hawaii of May 4. This is a distance at which strong triggering is often observed after large earthquakes and  this event was probably promoted from Hawaii. An earthquake in the Kuirl Islands of M 4.5 was also at 52 degrees from Hawaii today and at 51.4 degrees from PNG.

 

O:  7MAY2018 08:08:19  20.8S  172.3E Mw=5.6  EMSC   VANUATU REGION               

O: 07MAY2018 08:08:20  20.8S  172.3E mw=5.6  ANSS   Ile Hunter New Caledonia

P:  8MAY2018 116629    21.0S  169.0E 4.0-5.6 AACAA  Loyalty Islands             

 

Earthquakes at 103-104 degrees from Hawaii also continued in central Asia with\ events in Tajikistan, Kyrgyzstan, China and Afghanistan today were in this region.

 

          

MODERATELY LARGE QUAKES IN EL SALVADOR

 

EARTHQUAKE SUMMARY FOR MAY 6, 2018

 

A series of moderate earthquakes including three of M 5.3-5.6 hit the region of El Salvador today. Local authorities reported 75 homes were damaged and three destroyed in these earthquakes but no one was killed. NEIS reported the largest of these at M 5.6 was felt with intensity IV in El Salvador at Mejicanos, and Rio Abajo, Honduras and II-III in Honduras at Siguatepeque, Valle de Angeles, El Terrero, Tegucigalpa, and Yaguacire and in El Salvador at Nueva San Salvador, San Salvador, Chinameca, El Rosario, El Salvador. Earlier, two quakes of M 5.2 were reported felt in Honduras at El Tablon, Tegucigalpa, Ajuterique, Comayagua and San Jose de Comayagua and in San Miguel, El Salvador at Chirilagua and San Miguel. This activity had been expected in early May near the antipode of Tropical Cyclone Flamboyan as noted in this summary:

 

" The antipode (of Flamboyan) is at or near the coast of central and eastern Mexico to El Salvador may see some related increases in seismicity in the next week.  The current antipode is located over Oaxaca, Mexico at 17N 96W, an aftershock zone where triggering is likely." (May 1-3, 2018)

 

An earthquake of M 7.3 hit the region of El Salvador on October 14, 2014 but the last within about 200 km of this with M>=5.6 was an M 6.1 on June 10, 2016. Forecasts 116438 and 116439 had expected this activity in El Salvador was likely

May 7-10. Areas to the northwest of this in Guatemala are located at the sixth node from the Gulf of Alaska (M 8.0) of January 23 and from the M 6.9 in Hawaii. Constructive interference in this area may promote a moderate to large quake in the next week.

 

O: 06MAY2018 12:37:58  13.2N   88.0W Mw=5.2  EMSC   EL SALVADOR

O: 06MAY2018 12:44:27  13.2N   88.0W Mw=5.2  EMSC   EL SALVADOR

O: 06MAY2018 16:10:37  13.2N   88.1W ML=3.9  EMSC   EL SALVADOR

O: 06MAY2018 18:21:08  13.2N   88.1W ML=4.1  EMSC   EL SALVADOR

O: 07MAY2018 06:52:46  13.2N   88.1W ML=4.1  EMSC   EL SALVADOR

O: 06MAY2018 14:52:54  13.2N   88.1W mb=4.8  EMSC   EL SALVADOR

O: 07MAY2018 06:57:06  13.2N   90.0W ML=4.3  EMSC   OFFSHORE EL SALVADOR

O: 07MAY2018 01:07:55  13.3N   88.0W ML=3.5  EMSC   EL SALVADOR

O: 06MAY2018 13:33:54  13.3N   88.0W ML=3.6  EMSC   EL SALVADOR

O: 06MAY2018 14:37:50  13.3N   88.0W mb=4.3  EMSC   EL SALVADOR

O: 06MAY2018 15:02:11  13.3N   88.0W mb=4.4  EMSC   EL SALVADOR

O: 06MAY2018 18:58:17  13.3N   88.0W mb=4.5  EMSC   EL SALVADOR

O: 06MAY2018 18:00:31  13.3N   88.1W ML=3.5  EMSC   EL SALVADOR

O: 07MAY2018 00:17:13  13.3N   88.1W ML=3.6  EMSC   EL SALVADOR

O: 07MAY2018 00:17:13  13.3N   88.1W ML=3.6  EMSC   EL SALVADOR

O: 06MAY2018 13:07:30  13.3N   88.1W ML=3.7  EMSC   EL SALVADOR

O: 06MAY2018 13:14:13  13.3N   88.1W ML=3.7  EMSC   EL SALVADOR

O: 06MAY2018 17:56:01  13.3N   88.1W ML=3.7  EMSC   EL SALVADOR

O: 06MAY2018 13:38:32  13.3N   88.1W ML=3.8  EMSC   EL SALVADOR

O: 06MAY2018 17:31:50  13.3N   88.1W ML=3.8  EMSC   EL SALVADOR

O: 06MAY2018 19:12:42  13.3N   88.1W ML=3.8  EMSC   EL SALVADOR

O: 06MAY2018 21:47:11  13.3N   88.1W ML=3.8  EMSC   EL SALVADOR

O: 07MAY2018 06:20:32  13.3N   88.1W ML=3.8  EMSC   EL SALVADOR

O: 06MAY2018 16:26:03  13.3N   88.1W ML=4.3  EMSC   EL SALVADOR

O: 06MAY2018 19:44:59  13.3N   88.1W ML=4.3  EMSC   EL SALVADOR

O: 06MAY2018 17:43:41  13.3N   88.1W mb=4.5  EMSC   EL SALVADOR

O: 06MAY2018 21:58:35  13.4N   88.0W ML=3.7  EMSC   EL SALVADOR

O:  6MAY2018 19:02:22  13.1N   88.1W Mw=5.6  EMSC   OFFSHORE EL SALVADOR         

P:  7MAY2018 116438    12.0N   88.0W 3.5-5.3 ABAAA  Nicaragua                  

P: 10MAY2018 116439    13.0N   88.0W 3.5-5.4 BAAAA  Nicaragua                  

 

The most unusual earthquake of the day occurred in the Gulf of Mexico south of Louisiana. NEIC reported it was felt in southern Louisiana in the Mississippi Delta, Buras, Raccoon Point Islands, Saint Bernard, Belle Chasse, New Orleans, Marrero, Harvey, Houma, Arna, Westwego, in Mississippi at Ocean Springs, Gulfport and Pass Christian; in Lumberton, Texas, Sarasota, Englewood, Cape Coral and North Miami Beach, Florida and Phenix City, Alabama among others and within about 900 km of the epicenter.  As this epicenter is located directly north of the activity in El Salvador it is likely it was promoted by those earthquakes. The only earthquakes of M>=4.6 in the past 30 years to occur in the northern Gulf of Mexico within about 300 km of this epicenter were a pair in 2006 of M 5.3 on February 10 and 5.8-5.9 on September 10, 2006.  This epicenter is located at the sixth node (60 degrees) from Hawaii and the seventh node (51 degrees) from the M 8.0 in the Gulf of Alaska of January 23, 2018 and was probably promoted from those sources. The fifth node (72 degrees) passes through the northeastern U.S. and Quebec, Canada where an M 1.7 quake occurred today in the Charlevoix Seismic Zone.

 

O:  6MAY2018 16:47:10  28.0N   88.6W mb=4.6  EMSC   GULF OF MEXICO               

 

At least 26 homes in Hawaii have now been destroyed in the current eruption. More than 2000 have been evacuated from the regions. Vents are releasing toxic gasses and lava. The largest aftershock today was an M 4.3 near Pahala. NEIC reported it was felt with intensity II-III in Volcano, Mountain View, Naalehu, Keaau, Hilo and Kailua Kona, Hawaii. Forecast 116453 expected this activity around May 5.

 

O:  6MAY2018 13:26:07  19.1N  155.2W mb=4.3  EMSC   ISLAND OF HAWAII, HAWAII     

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

EARTHQUAKES, VOLCANISM IN HAWAII DANGEROUS, WILL CONTINUE

 

EARTHQUAKE SUMMARY FOR MAY 5, 2018

 

Earthquakes continued over much of eastern Hawaii today. The larger of these were felt with intensity up to IV in Volcano and II-III in Hawaii National Park, Mountain View, Hilo and Papaikou and in general within 50 km of the epicenters.

The ash and gasses associated with the eruption are becoming an air quality problem in the area of the big island of Hawaii, but will probably dissipate before reaching other island to the west. Travel in the region has been disrupted due to cracks and volcanic flows over highways and roads. More than 1500 people have been evacuated and a new fissure opened up today in the eruption. The new fissures released noxious gasses and is within several hundred yards of homes and subdivisions. At least five homes in Hawaii have been destroyed in this eruption. The governor of Hawaii has declared a state of Emergency for the Island. This eruption is expected to continue for weeks to months and will be enhanced by geomagnetic, meteorological and seismological disturbances along with tidal stresses in the coming days. Forecast 116453 had expected this activity around May 5.

 

O: 05MAY2018 17:06:10  19.1N  155.2W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 06MAY2018 05:44:29  19.1N  155.2W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 13:11:47  19.1N  155.2W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 16:52:13  19.2N  154.9W ML=3.4  EMSC   HAWAII REGION, HAWAII

O: 06MAY2018 06:09:52  19.2N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 06MAY2018 00:03:48  19.4N  154.9W ML=3.3  EMSC   HAWAII REGION, HAWAII

O: 06MAY2018 05:11:01  19.4N  155.0W ML=3.0  EMSC   HAWAII REGION, HAWAII

O: 06MAY2018 01:15:11  19.4N  155.0W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 11:03:40  19.4N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 06MAY2018 02:06:16  19.4N  155.2W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 06MAY2018 04:41:02  19.4N  155.2W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 06MAY2018 05:51:06  19.4N  155.2W Ml=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 18:25:43  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O:  6MAY2018 00:12:11  19.1N  155.0W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII     

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

Far-field encouragement of volcanic activity from Hawaii also continued today with moderate seismicity on ocean ridges. A series of events in the northern mid-Atlantic of M 4.7, 4.7 and 4.8 occurred today. The largest of these occurred within about an hour of local solar noon, a prime time for tidal stresses and was probably promoted from a combination of stresses from Hawaii at 100 degrees from these epicenters and tidal stresses. Forecast 116456 had expected this activity was likely within about 100 km around May 5.

 

O:  5MAY2018 10:29:14  27.9N   43.6W ML=4.7  EMSC   NORTHERN MID-ATLANTIC RIDGE  

O:  5MAY2018 10:27:45  28.1N   43.8W mb=4.7  EMSC   NORTHERN MID-ATLANTIC RIDGE  

O:  5MAY2018 14:04:12  28.2N   43.9W mb=4.8  EMSC   NORTHERN MID-ATLANTIC RIDGE  

P:  5MAY2018 116456    29.0N   43.0W 4.0-5.4 AAAAA  Mid-Atlantic Ridge         

 

O:  6MAY2018 05:10:01  34.7S  107.7W mb=4.8  EMSC   SOUTHERN EAST PACIFIC RISE   

O:  6MAY2018 05:10:01  34.7S  107.7W mb=4.8  ANSS   Southern East Pacific Rise"  

 

One region which lies at about 103 degrees from Hawaii in the area of central Asia in Tajikistan, Kyrgyzstan, and western China. This area has shown increased seismicity since the M 6.9 in Hawaii and this activity continued today. The events in Kazakhstan, Kyrgyzstan, Tajikistan and Western Xizang occurred between 100 and 108 degrees from Hawaii and were probably promoted by the M 6.9 there. Seismic energy concentrates on the surface after major earthquakes because it is reflected and refracted to this distance of 100-108 degrees off the core-mantle boundary. This is often followed by strong seismic enhancement in this distance zone. In addition to the activity in central Asia events of M 4.5 occurred in Sumatra today at 104 degrees from Hawaii and in Poland of M 4.0. Another area which could see a promoted moderate to large quake after the M 6.9 in Hawaii is eastern Honshu, Japan which is located at the sixth node (60 degrees) from Hawaii where promotion is likely. Six moderate quakes have hit eastern Japan since the eruption and earthquake in Hawaii including those of M 5.3, the largest in the world today in the Izu Islands and of M 4.2 and 4.5 to the north of that.

 

O:  6MAY2018 09:23:37  34.6N   96.5E mb=5.0  EMSC   SOUTHERN QINGHAI, CHINA      

O: 06MAY2018 09:23:38  34.6N   96.5E mb=5.0  ANSS   NNW of Gyegu China

P:  3MAY2018 116531    36.0N   93.0E 3.8-5.3 BBBAA  Xizang                     

 

O:  5MAY2018 19:56:31  35.9N   88.8E mb=4.1  EMSC   WESTERN XIZANG               

P:  3MAY2018 116531    34.0N   89.0E 3.8-5.4 ABAAA  Xizang                     

 

O:  5MAY2018 18:32:25  36.3N   70.4E mb=4.2  EMSC   HINDU KUSH REGION, AFGHANISTAN

P:  7MAY2018 116486    36.0N   70.0E 3.8-5.8 AAAAA  Hindu Kush/Pakistan        

 

O:  6MAY2018 00:01:14  37.5N   71.5E mb=5.0  EMSC   TAJIKISTAN                   

P:  4MAY2018 116487    39.0N   71.0E 3.8-5.6 ABAAA  Hindu Kush/Pakistan        

 

NEIC reported this earthquake of M 4.8 in Tajikistan was felt with intensity II-III in the area(s) of Mahmoud Raqui, Afghanistan.

 

O:  6MAY2018 03:17:22  39.5N   73.5E mb=4.8  EMSC   KYRGYZSTAN                   

P:  3MAY2018 116487    38.0N   73.0E 3.8-5.5 BBAAA  Hindu Kush/Pakistan        

 

O:  6MAY2018 06:43:22  43.9N   86.4E mb=4.3  EMSC   NORTHERN XINJIANG, CHINA     

 

O:  6MAY2018 07:06:20  45.3N   79.9E mb=4.5  EMSC   EASTERN KAZAKHSTAN           

P: 11MAY2018 116543    40.0N   78.0E 4.0-5.4 BCBAA  Kirgizstan/Xinjiang        

 

A series of earthquakes of moderate size have been occurring in the region of El Salvador to eastern Mexico. This swarm may continue and increase in intensity. These events were expected at this time as the region is at the antipode of Tropical Cyclone Flamboyan. This summary had noted this relation in earlier issues as:

 

" The antipode (of Flamboyan) is at or near the coast of central and eastern Mexico to El Salvador may see some related increases in seismicity in the next week.  The current antipode is located over Oaxaca, Mexico at 17N 96W, an aftershock zone where triggering is likely." (May 1-3, 2018)

 

AJOR EARTHQUAKE SHAKES HAWAII

 

EARTHQUAKE SUMMARY FOR MAY 4, 2018

 

A major earthquake of M 6.9-7.0 hit the island of Hawaii today after several days of increasing seismicity and volcanism in the area. This included the strongest quake of the series which occurred about an hour prior to the mainshock with M 5.4. NEIC reported damage with this earthquake but no major tsunami was observed. The earthquake occurred within about 15 minutes of local solar noon and was probably promoted by tidal stresses which maximize at this hour. NEIC reported the mainshock was felt throughout the area of Hawaii. Intensity VI-VII was felt within about 100 km of the epicenter at Pahoa, Mountain View, Kurtistown, Volcano, Keaau, Hawaii National Park, Hilo, Papaikou, Pepeekeo, Pahala, with lesser shaking within about 500 km of the epicenter.

 

An M 5.3 followed about 40 km north of the epicenter of the major quake. NEIC reported it was felt with intensity IV in Hilo and II-III in Volcano, Pahoa, Naalehu, Mountain View, Kurtistown, Captain Cook, Keaau, Papaiko, Paauilo and within about 100 km of the epicenter. The strongest aftershock were of M 4.6 5.0. They were generally reported felt with intensity II-III in Pahoa, Keaau, Papaikou, Hilo, Pepeekeo, Kamuela and Kihei, Hawaii.

 

The activity in Hawaii has been followed in this summary over the past month. It began after the Bolivia quake of M 6.8 which occurred at deep focus on April 5.

As noted in this report in the previous issue:

 

"It is also possible that this activity was promoted from the deep focus earthquake in Bolivia of early April just before this Hawaiian activity began. The distance from Bolivia to Hawaii is 99 degrees. While this is not 103 degrees and is typical of far-field triggering, the deep focus of the Bolivian event means that the concentration of energy on the surface from that event would have occurred at 99-101 degrees from the Bolivian epicenter. This is consistent with the origination of the activity in Hawaii on April 11 and probably means this activity was promoted from Bolivia .." (May 3-4, 2018)

 

It is of some interest (see attached map) that many of the ocean ridge events involving volcanism reported in this summary over the past several days are located at 103 degrees from Hawaii. These which included moderate events in the Azores and south of Australia were probably related to energy from Hawaii. A series of similar events in the northern Mid-Atlantic of moderate size also occurred today at 100 degrees from Hawaii. This is the first quake on the northern Mid-Atlantic within about 200 km of this epicenter since an M 5.0 on September 27, 2017 and prior to that an M 4.8 on November 29, 2016.   Forecast 116456 had expected this event within about 100 km of the epicenter was likely around May 5.

 

O:  5MAY2018 10:29:14  27.9N   43.6W ML=4.7  EMSC   NORTHERN MID-ATLANTIC RIDGE  

O:  5MAY2018 10:27:51  28.6N   43.8W ML=4.6  EMSC   NORTHERN MID-ATLANTIC RIDGE  

P:  5MAY2018 116456    29.0N   43.0W 4.0-5.4 AAAAA  Mid-Atlantic Ridge         

 

The last earthquake in Hawaii with M>=6.9 was recorded on November 29, 1975 with M 7.2. An M 6.7 also occurred in the area of Kilauea on November 16, 1983.  There have been no such Hawaiian quakes in the past 35 years. Forecast 116453 had expected today's activity was likely around May 5, 2018.

 

O: 05MAY2018 03:30:15  19.1N  155.1W mb=4.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 10:05:44  19.1N  155.2W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:22:53  19.2N  154.9W ML=3.4  EMSC   HAWAII REGION, HAWAII

O: 05MAY2018 01:13:20  19.2N  155.3W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 05:27:28  19.2N  155.4W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 07:23:23  19.2N  155.4W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 07:55:13  19.3N  154.7W ML=3.6  EMSC   HAWAII REGION, HAWAII

O: 05MAY2018 01:20:28  19.3N  154.8W mb=4.2  EMSC   HAWAII REGION, HAWAII

O: 05MAY2018 03:01:41  19.3N  154.9W Ml=3.3  EMSC   HAWAII REGION, HAWAII

O: 04MAY2018 21:51:45  19.3N  155.0W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 01:28:38  19.3N  155.0W ML=3.4  EMSC   HAWAII REGION, HAWAII

O: 05MAY2018 05:14:39  19.3N  155.0W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 21:41:53  19.3N  155.0W ML=3.7  EMSC   HAWAII REGION, HAWAII

O: 04MAY2018 21:43:53  19.3N  155.0W ML=3.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 21:38:23  19.3N  155.0W ML=4.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 01:55:25  19.3N  155.1W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 06:43:10  19.3N  155.2W ML=2.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 00:19:20  19.3N  155.2W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:04:17  19.3N  155.2W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 08:59:20  19.3N  155.2W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:01:41  19.3N  155.2W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 22:37:18  19.3N  155.2W ML=4.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 22:42:42  19.3N  155.2W ML=4.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:50:52  19.3N  155.2W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 00:37:11  19.3N  155.4W mb=5.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:21:22  19.4N  154.8W ML=3.2  EMSC   HAWAII REGION, HAWAII

O: 05MAY2018 00:14:04  19.4N  154.9W ML=3.3  EMSC   HAWAII REGION, HAWAII

O: 04MAY2018 23:54:56  19.4N  155.0W Ml=3.0  EMSC   HAWAII REGION, HAWAII

O: 05MAY2018 02:59:08  19.4N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 21:54:02  19.4N  155.1W ML=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:59:58  19.4N  155.2W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 00:22:42  19.4N  155.2W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:11:09  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 00:54:58  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 00:57:01  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 01:06:58  19.4N  155.3W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 02:30:34  19.4N  155.3W ML=3.3  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:18:02  19.4N  155.3W ML=3.4  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 22:50:59  19.4N  155.3W ML=3.6  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 23:47:54  19.4N  155.3W ML=3.7  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 22:39:31  19.4N  155.3W ML=4.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 04MAY2018 22:48:20  19.4N  155.3W mb=4.8  EMSC   ISLAND OF HAWAII, HAWAII

O: 05MAY2018 06:11:10  19.5N  155.1W mb=4.4  EMSC   ISLAND OF HAWAII, HAWAII

O:  4MAY2018 21:32:46  19.5N  155.2W Mw=5.4  EMSC   ISLAND OF HAWAII, HAWAII     

O: 04MAY2018 22:32:55  19.4N  155.0W mw=6.9  ANSS   Leilani Estates Hawaii

O: 04MAY2018 22:32:55  19.5N  155.1W Mw=6.9  EMSC   ISLAND OF HAWAII, HAWAII

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 AAAAA  Hawaii area                

P:  7MAY2018 116453    20.3N  156.6W 4.0-5.9 BAAAA  Hawaii area                

 

PHIVOLCS reported a foreshock to a large Luzon quake of M 4.6 was felt with intensity II in Sorsogon City, Philippines. The strong mainshock of M 6.1-6.2 also hit the region of Luzon, Philippines in the Bicol area today. NEIC reported it was felt in Bicol with intensity IV-V in Calolbon, Daet, Calabanga, Labo, Naga, Bonga, Legazpi, Malabog, Bariw. It was also felt with intensity II-III in Central Luzon at Mandili; in Southern Tagalog at Imus, Bacoor, Manile, Loma de Gato, Malanday, Cainta, and in Bicol in Tinago, San Rafael, Ponso, San Miguel, Baao, Marupit, Magarao, Cadlan, Bombon, Philippines. PHIVOLCS reported the foreshock of M 4.6 was felt with intensity II in Sorsogon City, Philippines.

 

The mainshock of M 6.0-6.1 was felt with intensity IV in Irosin Sorsogon; Legazpi City and Ligao, Albay; III in Obando Bulacan and II in Quezon City, Masbate City, Philippines. Slight damage was reported in the epicentral area. This is a volcanic area and volcanism, perhaps at Mayon, could be triggered from earthquakes such as this. This is the strongest earthquake in central Luzon within about 200 km of this epicenter since an M 6.9 on March 3, 2008 and prior to that an M 6.5 on November 18, 2003. Forecast 116434 had expected today's event in Luzon was likely around May 5.

 

O:  5MAY2018 02:18:27  13.5N  124.5E MS=4.6  PHI  Felt with intensity II in Sorsog

O:  5MAY2018 06:19:05  14.4N  124.0E MS=6.0  PHI  Felt with intensity IV in Irosin

O:  5MAY2018 06:19:04  14.5N  123.9E mw=6.1  ANSS   NNW of Pandan Philippines    

P:  5MAY2018 116434    14.0N  121.0E 3.5-5.1 AACAA  Luzon, Philippines         

 

 

 

MODERATE QUAKE; ERUPTION  SHAKES HAWAII

 

EARTHQUAKE SUMMARY FOR MAY 3, 2018

 

An earthquake of M 5.0-5.1 hit the region near Kilauea Volcano, Hawaii today was followed by a strong eruption of Kilauea Volcano. This epicenter is not part of the swarm occurring about 25 km southeast of this epicenter which has been active over the past three days. The precursory activity to this has been covered in previous issues of this summary beginning in mid-April. It is likely that stresses associated with the swarm helped bring about today's earthquake however. The cracking of the floor of the crater may have spread like cracks in a window eventually finding an area where stresses would support a larger event such as today's. The M 5.0 occurred within about an hour of local solar noon, a time when tidal  stresses are maximized and these too, probably helped this event at this time. As noted in this summary on May 1-2:

 

"The last earthquake in Hawaii with M>=4.2 was an M 4.2 on July 30, 2017. This followed an M 4.5 on June 21, 2017. The last event in the region with M>5 was an M 5.2 on June 28, 2015. Forecast 116453 had expected this activity in Hawaii within about 10 km of the epicenter was likely around May 5." (May 1-2, 2018)

 

And

 

"The full moon will arrive at 00:58 UT on April 30. As with previous full moons longitude zones around 15 West and 165 East will see highest tidal stresses. These include the mid-Atlantic and portions of western Europe in the west and the Aleutian Islands south to Tonga/Fiji, Vanuatu and the New Zealand arc in the east. While global seismicity is expected to show enhanced magnitude from April 28 through May 3, these longitude zones are most likely to see a large earthquake in this period. Earthquakes will also tend to center near local solar noon and midnight during this period." (April 28 - May 2, 2018)

 

This summary first identified this new phase of volcanism when a swarm occurred on April 11 near the time of the new moon. This summary had stated at the time:

 

"While there is always low level seismicity in Hawaii at Kilauea on the big island, the sudden enhancement of light earthquakes in the area suggest a resurgence of volcanism is in progress. As noted, this may be related to the ohmic heating of the magma by geomagnetic induction in the current geomagnetic storm." (April 11-12, 2018)

 

It is also possible that this activity was promoted from the deep focus earthquake in Bolivia of early April just before this Hawaiian activity began. The distance from Bolivia to Hawaii is 99 degrees. While this is not 103 degrees and is typical of far-field triggering, the deep focus of the Bolivian event means that the concentration of energy on the surface from that event would have occurred at 99-101 degrees from the Bolivian epicenter. This is consistent with the origination of the activity in Hawaii on April 11 and probably means this activity was promoted from Bolivia. Earthquakes in the Pacific-Antarctic Ridge (M 4.9) and Tonga/Fiji today also occurred at this distance from Bolivia.

 

The M 5.0 in Hawaii was reported by NEIC to have been felt with intensity IV in Hawaii at Pahoa, Mountain View, Volcano, Kurtistown, Hilo, Papaikou, Pepeekeo, Honomu, Hakalau, Ookala, Holualoa, Honaunau, and Honolulu and in general within about 100 km of the epicenter. Lesser shaking of intensity II-III was reported from Waikoloa, Kailua Kona, Kamuela, Honokaa, Kealakekua, Captain Cook, Naalehu, Paauilo, Laupahoehoe, Papaaloa, Pahala, Keaau, and Hawaii National Park, Hawaii.

Many light aftershocks were felt. Forecast 116453 had expected today's event  within about 5 km of this epicenter as located by ANSS was likely with magnitude up to M 5.6 around May 5. This forecast was first published on April 30 – before the current activity began.

 

O:  3MAY2018 20:30:57  19.5N  155.2W mb=5.0  EMSC   ISLAND OF HAWAII, HAWAII     

O: 03MAY2018 20:30:56  19.3N  155.1W mb=5.0  ANSS   18km S of Fern, Hawaii

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

Outside the activity in Hawaii the strongest earthquake in the U.S. or Canada today was an M 4.7 in the western Andreanof Islands, Alaska. It was not reported felt in this epicentral area. An M 4.4 hit near this on April 23 and to the east as an M 4.3 on April 29, but the last of stronger size in this area of the Andreanof Islands was an M 4. on March 14, 2018. Forecast 116571 had expected today's event was likely around May 1.

 

O:  3MAY2018 18:51:29  51.8N  179.8W mb=4.6  EMSC   ANDREANOF ISLANDS, ALEUTIAN IS

P:  1MAY2018 116571    50.5N  179.8W 3.5-5.0 ABAAA  Andreanoff Isls, Aleutians 

 

The strongest earthquake of the day was an M 5.4 in the Easter Island region of the South Pacific. This continues a strong series of earthquakes in this region (including an M 6.0) over the past several days. Much of this activity is located near 103 degrees from the last major earthquake in the world - the M 7.6 in Papua New Guinea of February 25, 2018 and was probably promoted by energy from that event. In the previous issue of this summary, it had been noted that these mid-ocean ridges were active at this time. This volcanism today extended to the Western Indian-Antarctic Ridge (M 4.8); an area southeast of Easter Island (M 4.6), the Galapagos (M 4.7) and in the Azores (M 4.9). None of these were reported felt and all had been forecast (116654, 116349, 116641, 116389 and 116208) to occur within about 200 km of these epicenters in early May or late April.

 

The most unusual of these was the M 4.7 in the Galapagos Islands region. The only event in the past 25 years within about 200 km of this epicenter with M>=4.7 was an M 4.9 on  February 28, 1998. Forecast 116387 expected the Galapagos to be active around May 3.

 

O:  4MAY2018 03:42:05   2.9S   87.9W ML=4.7  EMSC   GALAPAGOS ISLANDS REGION     

P:  3MAY2018 116387     1.0S   90.0W 3.5-5.3 ABBAA  Galapagos Islands          

 

The earthquake in the Azores was also somewhat unusual. It occurred within  about 15 minutes of local solar midnight and was probably promoted by high tidal stresses (the M 4.6 southeast of Easter Island also occurred near local solar midnight). This is the strongest quake within about 200 km of this epicenter since an M 4.9 on May 28, 2011, seven years ago. The last of larger size in this area was an M 5.4 on August 13, 2010, part of a swarm in the area. Forecast 116208 had expected today's event in this area was likely around April 30.

 

O:  4MAY2018 02:24:19  36.3N   33.8W mb=4.9  EMSC   AZORES ISLANDS REGION        

P: 30APR2018 116208    38.0N   32.0W 4.0-5.6 BBBAA  No. Mid-Atlantic Ridge     

 

The last event of M>=4.8 in the western Indian-Antarctic Ridge within about  300 km of today's quake occurred on May 25, 2017 (M 5.0) and prior to that on June 27, 2015 (M 5.1). Similar quakes in this region occur about one a year, the largest in the past 25 years in this area was an M 5.6-5.7 on June 3, 2009. Forecast 116654 had expected today's event within about 150 km of this epicenter was likely around May 5.

 

O:  3MAY2018 11:07:42  49.4S  120.6E mb=4.8  EMSC   WESTERN INDIAN-ANTARCTIC RIDGE

P:  5MAY2018 116654    49.0S  122.0E 4.0-5.4 AAAAA  So. of Australia           

 

O:  4MAY2018 03:36:48  24.2S  111.8W mb=5.4  EMSC   EASTER ISLAND REGION         

P: 30APR2018 116349    25.0S  112.0W 4.0-5.4 BAAAA  So. East Pacific Rise      

 

O:  4MAY2018 07:40:04  36.2S  101.5W mb=4.6  EMSC   SOUTHEAST OF EASTER ISLAND   

P: 10MAY2018 116641    36.0S   97.0W 4.0-5.6 CACAA  Chile Rise                 

 

 

 

VOLCANISM ON THE RISE

 

EARTHQUAKE SUMMARY FOR MAY 2, 2018

 

A series of earthquakes today hit in areas where volcanic activity is occurring. The strongest of these was an M 6.0 in the area near the East Pacific Rise and Easter Island where a series of moderate quakes occurred yesterday. The East Pacific Rise is a volcanic ridge and these events are probably associated with underwater eruptions in that area. An M 5.0 also occurred in the Reykjanes Ridge on the North Mid-Atlantic Ridge system, another volcanic regime. The most newsworthy events of the day continued in Hawaii where a volcanic eruption warning was issued today following three days of light earthquakes and the collapse of the floor of a Kilauea-related crater. In Vanuatu an eruption of Ambae Island prompted the announced permanent evacuation of that island. In recent days a series of moderate to strong earthquakes have hit ocean ridges in the South Indian Ocean on April 19 and 29 with M 6.0 each and in the East Pacific Rise on May 2, 2018 with M 6.0. Seismicity in most of the world has been very low during April with only an M 6.2 in Chile on April 10 and an M 6.3 aftershock in Papua New Guinea on April 7, 2018. No earthquakes of M>=6.3 have occurred in the past month since an M 6.8 under Bolivia on April 2. The last of M>6 was the M 6.2 in Chile three weeks ago on April 10. Volcanism is often at elevated levels when large earthquakes are few so this pattern is not unexpected. Volcanism is also elevated with high tidal stresses such as at the full or new moon alignments. The events in the Reykjanes Ridge (M 5.0); a similar event near Ascension Island and the activity in Vanuatu are at longitudes of especially high tidal stresses with this full moon as noted in previous issues:

 

"The full moon will arrive at 00:58 UT on April 30. As with previous full moons longitude zones around 15 West and 165 East will see highest tidal stresses. These include the mid-Atlantic and portions of western Europe in the west and the Aleutian Islands south to Tonga/Fiji, Vanuatu and the New Zealand arc in the east. While global seismicity is expected to show enhanced magnitude from April 28 through May 3, these longitude zones are most likely to see a large earthquake in this period. Earthquakes will also tend to center near local solar noon and midnight during this period." (April 28 - May 1, 2018)

 

The nation of Vanuatu is planning to permanently evacuate the island of Ambae due to the current eruption which is spewing ash and killing crops. More than 10,000 people may be relocated. This may have been triggered by an M 5.8 near Ambae Island of April 30.

 

O: 30APR2018 18:24:53  16.0S  168.4E mw=5.8  ANSS   E of Lakatoro Vanuatu

O: 30APR2018 18:24:53  15.9S  168.3E Mw=5.8  EMSC   VANUATU                      

P: 22APR2018 116340    16.0S  168.0E 4.0-5.6 CAAAA  Vanuatu Islands            

 

The series of earthquakes continued today in Hawaii with at least four of M>=3. This has prompted local authorities to issue a volcano watch for people in Hawaii. This involves preparation for unstable geologic activity and evacuation if necessary. The quakes followed the collapse of a crater floor in the Pu'u O'o vent.

 

NEIC reported these earthquakes of M>=3.0 in Hawaii were felt with intensity II-III in the area(s) of Pahoa, Hawaii.

 

O: 03MAY2018 04:06:43  19.4N  154.8W ML=3.0  EMSC   HAWAII REGION, HAWAII

O: 02MAY2018 23:28:31  19.4N  154.9W ML=3.0  EMSC   HAWAII REGION, HAWAII

O: 03MAY2018 04:26:16  19.5N  154.8W ML=3.1  EMSC   HAWAII REGION, HAWAII

O:  3MAY2018 03:36:16  19.5N  154.8W ML=3.2  EMSC   HAWAII REGION, HAWAII        

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 AAAAA  Hawaii area                

 

O:  2MAY2018 10:13:20  52.6N   32.2W mb=5.0  EMSC   REYKJANES RIDGE              

P:  9MAY2018 116582    53.0N   35.0W 4.0-5.5 CABAA  North Mid-Atlantic Ridge   

 

O:  2MAY2018 23:34:04   5.8S   11.6W mb=4.9  EMSC   ASCENSION ISLAND REGION      

P:  1MAY2018 116409     5.0S   12.0W 4.0-5.7 AAAAA  No. of Ascension Isl       

P: 30APR2018 116121     5.0S   12.0W 4.0-5.8 AAAAA  No. of Ascension Isl       

 

An earthquake of M 6.0 hit the East Pacific Rise today near Easter Island. The largest of these were not felt but occurred within about 15 minutes of local solar midnight, a time when tidal stresses maximize. These probably helped promote this swarm. The last time a swarm within about 300 km of these epicenters occurred which included an event of M>=5.6 was September 3-6, 2014 when events of M 5.8, 5.9 and 6.1 hit about 300 km southwest of today's epicenters. The last nearer to this was in the summer of 2005 when quakes of M 5.7-5.9 occurred in June, July and August. Forecast 116349 had expected today's activity within about 100 km of these epicenter was likely around April 30. This is the strongest earthquake in  the world in the past three weeks.

 

O:  2MAY2018 06:46:59  23.7S  111.4W mb=4.9  EMSC   EASTER ISLAND REGION         

O:  2MAY2018 06:32:48  24.3S  111.7W Mw=6.0  EMSC   EASTER ISLAND REGION         

P: 30APR2018 116349    25.0S  112.0W 4.0-5.4 AAAAA  So. East Pacific Rise      

 

EARTHQUAKES IN HAWAII MAY BRING NEW ERUPTION

 

EARTHQUAKE SUMMARY FOR MAY 1, 2018

 

The earthquake swarm in Hawaii continued at high intensity today. The epicenters of these events are to the west of the normal seismicity associated with Kilauea and represent a new area for such seismicity. The strongest events occurred in the Leilani Estates, Hawaii today were an M 4.2, 3.3, 3.7, 3.5, 3.1 and M 3.4  located at this new epicenter. NEIC reported it was felt with intensity II-III in  Keaau, Pahoa, Kurtistown, Mountain View, Hilo, Papaikou, Pepeekeo, Volcano and Pepeekeo, Hawaii. The strongest of these was an M 4.2 about 15 km to the west of the new series in the Volcano region of Hawaii. NEIC reported it was felt with intensity IV in Pepeekeo, and Honomu, and II-III in Volcano, Pahoa, Mountain View, Kurtistown, Keaau, Hilo, Papaikou, Hakalau, Waikoloa, Wailuku, Kaneohe, Hawaii. These earthquakes may indicate a new eruption and the collapse of the crater floor at the Puu Oo vent of Kilauea according to local geoscientists. Similar activity, noted in this summary in  mid-April with the new moon, caused scientists to issue an alert when the Puu Oo vent began inflating. The current activity is in an area of housing and recreation and citizens are being warned to be aware for a new lava flow. Public access to some areas is down or restricted in case of a new eruption of lava.

 

The strongest earthquakes in the U.S. or Canada were an M 4.3 and  M 4.1 in the Gulf of Alaska and the Fox Islands of Alaska. These are not unusual in these regions which are currently active. The M 4.2 in Hawaii was the strongest in the U.S. outside Canada today. The last earthquake in Hawaii with M>=4.2 was an M 4.2 on July 30, 2017. This followed an M 4.5 on June 21, 2017. The last event in the region with M>5 was an M 5.2 on June 28, 2015. Forecast 116453 had expected this activity in Hawaii within about 10 km of the epicenter was likely around

May 5.

 

O: 02MAY2018 06:47:43  19.3N  155.0W ML=3.1  EMSC   HAWAII REGION, HAWAII

O: 01MAY2018 13:12:59  19.3N  155.0W ML=3.2  EMSC   ISLAND OF HAWAII, HAWAII

O: 01MAY2018 22:07:42  19.3N  155.0W ML=3.7  EMSC   HAWAII REGION, HAWAII

O: 01MAY2018 15:52:09  19.3N  155.0W Ml=3.5  EMSC   ISLAND OF HAWAII, HAWAII

O: 01MAY2018 05:49:09  19.3N  155.1W ML=3.1  EMSC   ISLAND OF HAWAII, HAWAII

O: 01MAY2018 12:38:20  19.4N  155.0W ML=3.1  EMSC   HAWAII REGION, HAWAII

O: 01MAY2018 09:41:46  19.4N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII

O: 01MAY2018 12:39:11  19.3N  155.1W ml=4.2  ANSS   SE of Volcano Hawaii

O:  2MAY2018 05:34:20  19.5N  154.9W ML=3.1  EMSC   HAWAII REGION, HAWAII        

P:  5MAY2018 116453    19.3N  155.1W 4.0-5.6 BAAAA  Hawaii area                

 

A light to moderate earthquake occurred today in the area of San Clemente Island south of Los Angeles with M 3.9. It was followed by a series of light aftershocks.  The mainshock of M 3.9 was reported felt with intensity II-III in Dana Point, Newport Coast, San Pedro, Newport Beach, San Clemente, Laguna Niguel, Aliso Viejo, Irvine, Oceanside, Long Beach, Carlsbad, Harbor City, Santa Ana, Imperial Beach, Los Angeles, Escondido, Simi Valley and in general within about 150 km of the epicenter. The aftershocks included events of M 3.7, 3.4, 3.3 which was reported felt with intensity II-III in Newport Beach, San Juan Capistrano, Carlsbad, Huntington Beach, San Diego, Imperial Beach, National City, Santee, Bonita and La Mesa, California. This continues the activation of this region which began after the PNG quake of February 25. This included the strongest earthquake in the area since the Northridge quake of January, 1994, an M 5.3 in the Channel Islands in early  April 2018. The M 3.9 today is the strongest since an M 4.1 within about 50 km of this epicenter that occurred November 10, 2014. An M 4.9 on October 16, 2005 was the last in the area of significantly larger magnitude. Forecast 116218 had expected today's event was likely within about 50 km of this epicenter around April 29. These earthquakes occurred at 101-103 degrees from the PNG epicenter of February 25, 2018 (M 7.6) and may have promoted from that source.

 

O: 01MAY2018 11:57:27  32.8N  118.4W ML=2.8  EMSC   CHANNEL ISLANDS REG., CALIFORNIA

O: 01MAY2018 11:53:03  32.8N  118.4W ML=3.5  EMSC   CHANNEL ISLANDS, CALIFORNIA

O: 01MAY2018 11:22:22  32.8N  118.4W ML=3.9  EMSC   CHANNEL ISLANDS REG., CALIFORNIA

O:  1MAY2018 12:53:10  32.8N  118.5W ML=3.3  EMSC   CHANNEL ISLANDS REG., CALIFORN

P: 29APR2018 116218    32.4N  118.2W 2.5-4.6 AAAAA  So. California             

 

The activity in the Channel Islands was followed by activity later in the day in the region of western Los Angeles of M 2.2 and 2.4. This is a progression which could include a moderate quake in the western valleys near Los Angeles. Forecast 116511 had expected this activity around May 1.

 

O:  2MAY2018 05:38:47  33.9N  118.7W ML=2.2  EMSC   CHANNEL ISLANDS REG., CALIFORN

O:  2MAY2018 00:46:45  34.1N  119.0W ML=2.4  EMSC   GREATER LOS ANGELES AREA, CALI

P:  1MAY2018 116511    33.9N  118.3W 2.5-4.9 AAAAA  So. California             

 

The strongest seismicity in the world today occurred in the South Pacific Ocean and included moderately strong earthquakes of M 5.7-6.0 in the Pacific-Antarctic Rise, a series including events of M 5.5-5.6 in the East Pacific Rise and three in Fiji near the IDL. This activity was probably promoted by strong tidal stresses associated with the full moon of April 30 as previously noted in this summary:

 

 

"The full moon will arrive at 00:58 UT on April 30. As with previous full moons longitude zones around 15 West and 165 East will see highest tidal stresses. These include the mid-Atlantic and portions of western Europe in the west and the Aleutian Islands south to Tonga/Fiji, Vanuatu and the New Zealand arc in the east. While global seismicity is expected to show enhanced magnitude from April 28 through May 3, these longitude zones are most likely to see a large earthquake in this period. Earthquakes will also tend to center near local solar noon and midnight during this period." (April 28 - May 1, 2018)

 

The last earthquake of M>=5.9 within about 300 km of the epicenter of the Pacific-Antarctic event was an M 5.9 on July 6, 2016. The last of larger magnitude was an M 6.4 on October 30, 2010 and prior to that an M 6.2 on September 5, 2005.

 

O:  1MAY2018 17:15:40  56.7S  142.1W Mw=5.9  EMSC   PACIFIC-ANTARCTIC RIDGE      

 

A series of moderate earthquakes including an M 5.5, 5.6 and 5.2 hit the East Pacific Rise today near Easter Island. The largest of these were not felt but occurred within about 15 minutes of local solar midnight, a time when tidal stresses maximize. These probably helped promote this swarm. The last time a swarm within about 300 km of these epicenters occurred which included an event of M>=5.6 was September 3-6, 2014 when events of M 5.8, 5.9 and 6.1 hit about 300 km southwest of today's epicenters. The last nearer to this was in the summer of 2005 when quakes of M 5.7-5.9 occurred in June, July and August.

Forecast 116349 had expected today's activity within about 100 km of these epicenter was likely around April 30.

 

Like the activity off southern California in the Channel Islands, these earthquakes occurred at 101-103 degrees from the PNG epicenter of February 25, 2018 (M 7.6) and may have promoted from that source.

 

O: 02MAY2018 06:32:55  24.2S  111.3W ML=5.6  EMSC   EASTER ISLAND REGION

O: 02MAY2018 00:17:12  24.3S  111.8W mb=5.2  EMSC   EASTER ISLAND REGION

O: 02MAY2018 06:31:32  24.3S  112.1W mb=5.5  EMSC   EASTER ISLAND REGION

O: 02MAY2018 06:26:29  24.6S  112.2W mb=5.0  EMSC   EASTER ISLAND REGION

O:  2MAY2018 06:46:59  23.7S  111.4W mb=4.9  EMSC   EASTER ISLAND REGION         

P: 30APR2018 116349    25.0S  112.0W 4.0-5.4 ABAAA  So. East Pacific Rise      

 

Earthquakes of M 5.7 and 5.9 hit the Fiji Islands as well today. This is an active site with the most recent quakes of M>=5.9 on April 1 south of Fiji with M 6.1 and an M 5.8 on April 5. Forecasts 116329 and 116625 had expected this activity was likely within about 100 km of these epicenters in late April or early May.

 

NEIC reported this earthquake of M 5.7 in Fiji was felt with intensity IV in the Fiji Islands in Western Fiji at Lautoka and Ba and II-III in the area(s) of Nadi, Western Fiji.

 

O:  1MAY2018 12:45:33  16.6S  177.0E Mw=5.7  EMSC   FIJI REGION                  

P: 29APR2018 116329    16.0S  178.0E 4.0-5.4 AAAAA  Fiji Islands               

 

O:  1MAY2018 19:56:56  18.0S  177.9W mb=4.7  EMSC   FIJI REGION                  

O:  1MAY2018 19:47:53  18.0S  178.0W Mw=5.9  EMSC   FIJI REGION                  

P:  6MAY2018 116625    17.0S  178.0W 4.0-5.5 BAAAA  Tonga Islands              

 

MODERATELY STRONG QUAKE IN VANUATU PROMOTED BY FULL MOON

 

EARTHQUAKE SUMMARY FOR APRIL 30, 2018

 

The strongest earthquake in the world today was an M 5.8 in the central Vanuatu Islands.  NEIC reported it was felt with intensity III in Luganville, Sanma, Vanuatu. It was probably promoted by high tidal stresses associated with the full moon as expected in this summary:

 

 

"The full moon will arrive at 00:58 UT on April 30. As with previous full moons longitude zones around 15 West and 165 East will see highest tidal stresses. These include the mid-Atlantic and portions of western Europe in the west and the Aleutian Islands south to Tonga/Fiji, Vanuatu and the New Zealand arc in the east. While global seismicity is expected to show enhanced magnitude from April 28 through May 3, these longitude zones are most likely to see a large earthquake in this period. Earthquakes will also tend to center near local solar noon and midnight during this period." (April 28-30, 2018)

 

The last earthquake of M>=5.8 in central Vanuatu within about 200 km of this epicenter occurred on May 9, 2017 with M 6.8 nearly a year ago and prior to that as an M 5.9 on January 30, 2017.  Forecast 116340 had expected this event was likely within about 30 km of this epicenter at the end of April.

 

O: 30APR2018 18:24:53  16.0S  168.4E mw=5.8  ANSS   E of Lakatoro Vanuatu

O: 30APR2018 18:24:53  15.9S  168.3E Mw=5.8  EMSC   VANUATU                      

P: 22APR2018 116340    16.0S  168.0E 4.0-5.6 CAAAA  Vanuatu Islands            

 

An energetic swarm of light earthquakes occurred with the full moon today in Hawaii and were probably promoted by tidal stresses associated with that astronomical alignment. An M 3.0 was felt with intensity II-III in Pahoa, Hilo and Hakalau, Hawaii according to NEIC data. Hawaii often responds to lunar-solar alignments with minor swarms as magma increases its mobility. Forecast 116142 had expected this activity was likely at the end of April in Hawaii within about 25 km of theses swarms.

 

O:  1MAY2018 06:26:44  19.4N  155.0W Ml=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

O:  1MAY2018 05:49:09  19.4N  155.1W ML=3.0  EMSC   ISLAND OF HAWAII, HAWAII     

P: 29APR2018 116142    19.2N  155.2W 3.0-4.5 AAAAA  Hawaii