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Posts Tagged ‘Middle America Trench’

New Episode of Seismicity Occurring in Middle America Trench

Posted by feww on May 12, 2017

QY- 026M

Strong earthquake strikes off the coast of El Salvador 

The 6.2 magnitude event was followed by at least two aftershocks measuring 5.4mb and 4.7mb respectively.

Earthquake Details:

M: 6.2mww [USGS]
L: 12.911°N, 90.056°W [79km SSW of Acajutla, El Salvador;]
D: 10.0 km depth
T:2017-05-12 10:41:26 UTC

  • Seismic analysis and forecast are available from FIRE-EARTH PULSARS.

List of Earthquakes:

M4.7
94km SSW of Acajutla, El Salvador
2017-05-12 15:22:32 (UTC)
10.0 km

M5.4
75km SSW of Acajutla, El Salvador
2017-05-12 10:51:08 (UTC)
10.0 km

M: 6.2mww
L: 12.911°N, 90.056°W [79km SSW of Acajutla, El Salvador;]
D: 10.0 km depth
T:2017-05-12 10:41:26 UTC

M4.4
47km SW of San Francisco Menendez, El Salvador
2017-05-11 22:02:34 (UTC)
50.8 km

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Strong Earthquake Strikes Off the Coast of Colima, Mexico

Posted by feww on June 7, 2016

M6.2 earthquake strikes SSW of San Patricio, Mexico

Centered at 18.412°N, 105.188°W (115.0 km SW of Manzanillo, Mexico) the quake struck at a depth of 10.0 km, USGS/EHP reported.

The main shock struck about 190km SW of Volcán de Colima (19.513, -103.617). Colima is one of the 16 Decade Volcanoes.

The event was followed by at least two significant aftershocks, as of posting.

Latest Seismicity

M4.6 ~ 156km SSW of San Patricio, Mexico 2016-06-07 11:07:05 UTC 10.0 km
M5.5 ~ 93km SSW of San Patricio, Mexico 2016-06-07 10:58:01 UTC 10.0 km
M6.2 ~ 102km SSW of San Patricio, Mexico 2016-06-07 10:51:38 UTC 10.0 km
M4.1  ~ 30km SW of San Patricio, Mexico 2016-06-07 10:32:14 UTC 10.0 km

Excerpt from Seismotectonics of Mexico [USGS]

Mexico has a long history of destructive earthquakes and volcanic eruptions. In September 1985, a magnitude 8.1 earthquake killed more than 9,500 people in Mexico City. In southern Mexico, Volcán de Colima and El Chichón erupted in 2005 and 1982, respectively. Paricutín volcano, west of Mexico City, began venting smoke in a cornfield in 1943; a decade later this new volcano had grown to a height of 424 meters. Popocatépetl and Ixtaccíhuatl volcanos (“smoking mountain” and “white lady”, respectively), southeast of Mexico City, occasionally vent gas that can be clearly seen from the City, a reminder that volcanic activity is ongoing. In 1994 and 2000 Popocatépetl renewed its activity forcing the evacuation of nearby towns, causing seismologists and government officials to be concerned about the effect a large-scale eruption might have on the heavily populated region. Popocatépetl volcano last erupted in 2010.

 

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Strong Quake Strikes Offshore Guatemala

Posted by feww on April 15, 2016

M6.2 EQ Strikes 95km SSW of Champerico, Guatemala

Magnitude: 6.2Mw [USGS/EHP]
Location: 13.475°N 92.163°W depth=48.4 km (30.1 mi)
Time: 2016-04-15 14:11:29 (UTC)
Nearby Places

  • 95.0 km (59.0 mi) SSW of Champerico, Guatemala
  • 119.0 km (73.9 mi) S of Suchiate, Mexico
  • 123.0 km (76.4 mi) SW of Nueva Concepcion, Guatemala
  • 124.0 km (77.1 mi) SW of Pueblo Nuevo Tiquisate, Guatemala
  • 219.0 km (136.1 mi) SW of Guatemala City, Guatemala

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Strong Earthquake Strikes near Tres Picos, Mexico

Posted by feww on December 18, 2015

M 6.6 quake occurs 9km ENE of Tres Picos, Mexico

Centered at 15.888°N, 93.446°W the  quake occurred at a depth 97.8km, reported USGS/EHP.

This event could be a foreshock, according to FIRE-EARTH.

EQ Details

Magnitude: 6.6Mw
Location: 15.888°N, 93.446°W; depth = 97.8km
Time: 2015-12-17 19:49:54 (UTC)
Nearby Cities:

  • 9km (6mi) ENE of Tres Picos, Mexico
  • 31km (19mi) NW of Pijijiapan, Mexico
  • 39km (24mi) ESE of Tonala, Mexico
  • 61km (38mi) SE of Arriaga, Mexico
  • 343km (213mi) WNW of Guatemala City, Guatemala

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Turrialba Volcano Explodes Raining Ash on Costa Rica Capital

Posted by feww on March 13, 2015

Volcanic ash from Turrialba rains on Costa Rica capital San José

Volcanologists at the University of Costa Rica have reported at least four explosions at Turrialba Volcano starting Thursday local time.

Plumes of smoke, ash and volcanic gasses rose up to a height of about 1km above the crater’s summit, located some 50km  northeast of the capital San José.

Winds carried the ash and gasses from the volcano the capital, where it rained on cars and homes, restricting visibility and causing eye irritation, said local media.


Camera located in the crater of the Turrialba volcano, about 600 meters east of the active crater (looking west). The image is refreshed every 10 seconds. Source: Instituto Meteorológico Nacional.

“We have recommended the evacuation of people and small animals as a precautionary measure because the last explosion was very strong,” said a spokesman for the Volcanological and Seismological Observatory of Costa Rica (OBSIVORI).

The explosions follow two earthquakes which occurred near the Pacific coast of Costa Rica along the Middle America Trench, northwest of Fisher Seamount.

The larger of the two quakes measured magnitude 5.4Mw, and occurred at 10.603°N, 86.463°W, some 89km (55mi) W of Sardinal, Costa Rica, depth of 20.9km, at 16:23 UTC Wednesday.

Volcanic ash forced the closure of Costa Rica’s Juan Santamaría International Airport, said a report.

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Powerful Quake Strikes Nicaragua Coast

Posted by feww on October 14, 2014

HEIGHTENED GLOBAL SEISMICITY
SEISMIC HAZARD
SCENARIOS 09, 08, 07, 02
.

M7.3 Strikes 67km WSW of Jiquilillo, Nicaragua

Centered at 12.576°N, 88.046°W the quake occurred at a depth of about 40.0km close to the Middle America Trench, reported USGS/EHP.

The quake was followed by at least one significant aftershock, measuring  5.0Mw, as of posting.

Tsunami Evaluation

NO Pacific-wide Tsunami was generated.

Fatalities

“Yellow alert for shaking-related fatalities and economic losses. Some casualties and damage are possible and the impact should be relatively localized. Past yellow alerts have required a local or regional level response,” according to USGS model.

Estimated economic losses are expected to be less than 1% of GDP of Nicaragua.

Earthquake Details

Magnitude: 7.3Mw
Event Time: 2014-10-14 03:51:35 UTC
Location: 12.576°N 88.046°W depth=40.0km (24.9mi)
Nearby Cities

  • 67km (42mi) WSW of Jiquilillo, Nicaragua
  • 86km (53mi) SSW of La Union, El Salvador
  • 95km (59mi) W of Corinto, Nicaragua
  • 95km (59mi) SSE of San Rafael Oriente, El Salvador
  • 174km (108mi) SE of San Salvador, El Salvador

Other Significant Seismicity

M6.1 – South of the Kermadec Islands

Event Time: 2014-10-14 04:12:30 UTC
Location: 34.917°S, 179.970°E depth=31.5km (19.6mi)
Nearby Cities

  • 400km (249mi) SSW of L’Esperance Rock
  • 430km (267mi) NE of Whakatane, NZ
  • 450km (280mi) NNE of Gisborne, NZ
  • 459km (285mi) NE of Tauranga, NZ
  • 840km (522mi) NE of Wellington, NZ

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Strong Aftershock Hits SW Mexico

Posted by feww on May 10, 2014

SEISMIC HAZARD
HEIGHTENED GLOBAL SEISMICITY
SCENARIO 08
.

Strong aftershock strikes SW Mexico

The aftershock follows a magnitude 7.2 event that occurred on April 18 and a 6.4 shock, which struck the region on May 8, 2014.

Earthquake Details

Magnitude: 6.0Mw
Event Time: 2014-05-10 at 07:36:01 UTC
Location: 17.230°N 100.788°W depth=23.0km (14.3mi)
Nearby Cities:

  • 11km (7mi) W of Tecpan de Galeana, Mexico
  • 37km (23mi) W of Atoyac de Alvarez, Mexico
  • 59km (37mi) ESE of Petatlan, Mexico
  • 79km (49mi) WNW of Coyuca de Benitez, Mexico
  • 299km (186mi) SW of Mexico City, Mexico

Mexico 30-days
Mexico Earthquakes Location Map. April 18 – May 10, 2014. Source: USGS/EHP

FIRE-EARTH EQ Forecast

The next detailed FIRE-EARTH Earthquake Forecast will be released together with Bulletin NO. 96 on May 11, 2014.


FIRE-EARTH Earthquake Forecasts for California and Japan

Due to the reasons explained previously on this blog, FIRE-EARTH Science Team has suspended its research on California and Japan seismicity.


Related Links

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M6.4 Quake Rattles SW Mexico

Posted by feww on May 9, 2014

SEISMIC HAZARD
HEIGHTENED GLOBAL SEISMICITY
SCENARIO 08
.

Strong Earthquake Strikes Near Middle America Trench

Centered at 17.385°N, 100.656°W the quake occurred at a depth of about  23.9km (14.9mi), said USGS/EHP.

The event occurred close to the epicenter of powerful earthquake measuring 7.5Mw that struck the region on April 18, 2014.

Earthquake Details

Magnitude: 6.4Mw
Event Time: 2014-05-08 @ 17:00:17 UTC
Location: 17.385°N 100.656°W depth=23.9km (14.9mi)
Nearby Cities:

  • 15km (9mi) N of Tecpan de Galeana, Mexico
  • 31km (19mi) NW of Atoyac de Alvarez, Mexico
  • 66km (41mi) ESE of Petatlan, Mexico
  • 73km (45mi) WNW of Coyuca de Benitez, Mexico
  • 277km (172mi) SW of Mexico City, Mexico

Tsunami Evaluation

No tsunami generated.

EQ Location Map

mexico quake 9may2014
30-Day Magnitude 4.5+ EQs. Source: USGS/EHP

FIRE-EARTH EQ Forecast

The next detailed FIRE-EARTH Earthquake Forecast will be released together with Bulletin NO. 96 on May 11, 2014.


FIRE-EARTH Earthquake Forecasts for California and Japan

Due to the reasons explained previously on this blog, FIRE-EARTH Science Team has suspended its research on California and Japan seismicity.


Related Links

 

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Chaparrastique Spews More Ash, Volcanic Gases

Posted by feww on December 31, 2013

Chaparrastique Volcano in Eastern El Salvador is Still Spewing Ash and Volcanic Gases

Up to 5,000 people live near the volcano, and the authorities have so far evacuated more than 1,600 to emergency shelters, but many have refused to leave their homes on the volcano slopes.

“The Chaparrastique volcano is still producing gases combined with small emissions of ash, which is normal after an eruption,” said  El Salvador’s environment ministry.

The 2,130-m high volcano,  El Salvador’s third highest, ejected columns of smoke and ash up to 5km above the summit on Sunday

Chaparrastique, aka San Miguel volcano, located about 15km SW of San Miguel city (population: 180,000), and about 140 km east of San Salvador, the capital, showed signs of increased activity on December 13.

The eruption has so far deposited more than 10cm of ash in the nearby areas within the coffee-producing region, according to reports.

chaparistique - Elsalvador-dotcom
Latest image of Chaparistique Eruption. Source: El-Salvador.com

ash from san migul eruption on coffee plants
 Chaparistique eruption deposits volcanic ash on coffee plants. Source: El-Salvador.com

El Salvador

El Salvador sits along the Pacific Ring of Fire, close to Middle America Trench, and is subject to significant tectonic movement, causing frequent earthquakes and volcanic activity. The tiny country (population: 6.3 million) is home to at least 23 volcanoes.

Middle America Trench

A major subduction zone known for many large earthquakes, the Middle America Trench is a 2,800-km long oceanic trench in the eastern Pacific Ocean, extending from central Mexico to Costa Rica. The trench is the boundary between five tectonic plates, including the Caribbean, Cocos (and Rivera), Nazca, the North American and the South American plates.

Related Links

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Chaparrastique Eruption Forces Mass Evacuations in El Salvador

Posted by feww on December 30, 2013

Chaparrastique volcano eruption prompts evacuation of hundreds of communities

Civil protection authorities in El Salvador have imposed a 5-km exclusion zone around the San Miguel volcano, aka Chaparrastique, and are evacuating up to 5,000 villagers that live near the volcano.

The 2,130-m high volcano,  El Salvador’s third highest, ejected columns of smoke and ash up to 5km above the summit.

Chaparrastique, located about  15km SW of San Miguel city (population: 180,000), showed signs of increased activity on December 13.

The eruption has so far deposited more than 10cm of ash in the nearby areas within the coffee-producing region, officials said.

CHAPARRASTIQUE erupts 29-12-13
Chaparrastique erupts. Screen dump from a local news report timed at about 10:30 am local time December 29, 2013.

El Salvador

El Salvador sits along the Pacific Ring of Fire, close to Middle America Trench, and is subject to significant tectonic movement, causing frequent earthquakes and volcanic activity. The tiny country (population: 6.3 million) is home to at least 23 volcanoes.

Related Links

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