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Archive for the ‘filipino plate’ Category

Volcanic Explosions Could Split More Than Africa

Posted by feww on November 4, 2009

Volcanic Explosions and Large Earthquakes Could Splinter Several Continents, Countries

Large earthquakes and volcanic explosions could split Arabian Plate, North American Plate, Pacific Plate [in multiple places] and shatter Filipino Plate.


Erta Ale, an active shield volcano located in the Afar Region [northeastern] of Ethiopia in the Danakil Desert, is Ethiopia’s only active volcano.License: cc-by-sa-2.0. Credit: posted to Flickr by filippo_jean.

Erta Ale is part of the so-called Afar Triangle, a highly active volcanic region which includes Dabbahu Volcano, located in the remote Afar Region of Ethiopia. Dabbahu eruption in 2005 created a large fissure in the ground, called the Dabbahu fissure. The volcano is the hottest place on Earth’s  surface.

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Dabbahu Fissure. Image JPL/NASA.

Leading to Dabbahu’s only known eruption in recorded history, which formed a 500 meter long fissure and a 30 meter wide pumice cone at the fissure’s southern end, on September 26, 2005 the ground swelled as a cluster of more than 130 tremors shook the area near the volcano.

dabbahu fissure
Dabbahu Fissure, along the Somalian Plate, Great Rift Valley (Boina/Afar, Danakil desert, Ethiopia). A ground rupture created during the September 2005 rifting event. Photo: Tony Philpotts/ AP. Image may be subject to copyright.

Researchers say volcanic activity could split the African continent in two, a claim supported by a recent ground rupture that appeared in northeastern Ethiopia.

The 60-kilometre (35-mile) split in the desolate Afar region, which was the result of two volcanic eruptions in September 2005 [Dabbahu Episode, Afar,]  has enabled scientists to further examine the earth’s tectonic movements, said a report published in the Geophysical Research Letters.

“The significance of the finding is that a huge magnetic deformation can happen within a few days like in oceans,” Atalay Arefe, an Ethiopia-based university professor who was part of the study, told AFP in an interview.

Faults and fissures that normally occur on the ocean floor largely contribute to the continents breaking off  and moving away [spreading] from each other, in the same way African continent broke away from South American plate 100 million years ago.

“Normally, such phenomena happens beneath the ocean, which is inaccessible, expensive and very difficult to make experiments. But in Afar, it’s quite a natural laboratory for us to carry those out,” Atalay said.

Atalay, who was part of an international group of scientists who have been undertaking studies since the eruptions, said the event indicated what was likely to happen in the mainland.

“The ocean’s formation is happening slowly, likely to take a few million years. It will stretch from the Afar depression (straddling Ethiopia, Eritrea and Djibouti) down to Mozambique,” he said.

At 120 meter below sea level, Ethiopia’s Afar Depression is one of the lowest and hottest places on Earth, famous for its salt mines.

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Posted in Arabian Plate, filipino plate, Gulf of aden rift, large earthquakes, Nubian Plate, red sea drift, Somalian plate, Volcanic Explosions | Tagged: , , , , , , | 5 Comments »

Seventh Powerful Quake Hits Japan Region

Posted by feww on October 30, 2009

Powerful Earthquake measuring up to 7.2 Mw Strikes  RYUKYU ISLANDS, JAPAN

Background:

A powerful earthquake measuring up to 7.2 Mw occurred in Ryukyu Islands, Japan, about 280 km (175 miles) SSW of Kagoshima, Kyushu, at a depth of 35 km (21.7 miles), on Friday, October 30, 2009 at 07:03 UTC.

Referring to an earlier forecast, FEWW Moderators believe an additional series of 6 – 7 quakes measuring ≥ 6.0 Mw could strike Japan region in the coming weeks.

FEWW Moderators had previously anticipated more powerful earthquakes in the region, including as many as 10 additional magnitude 6+ quakes to strike the region in the coming weeks.

A moderate earthquake measuring up to 5.3 Mw struck near 29.165°N, 130.061°Eclose to the latest event on Sunday, October 25, 2009 at 06:17 UTC at a depth of about 47.5 km (29.5 miles).

10-degree Map Centered at 30°N,130°E

RYUKYU ISLANDS -  JAPAN - 30-10-2009
Earthquake Location Map. Source: USGS/EHP. Map enhanced by FEWW.

Earthquake Details:

  • Reported Magnitude: 6.9 [Maximum quake magnitude estimated by FEWW at 7.2 Mw]
  • Date-Time:
    • Friday, October 30, 2009 at 07:03:39 UTC
    • Friday, October 30, 2009 at 04:03:39 PM at epicenter
  • Location: 29.154°N, 129.903°E
  • Depth:  35 km (21.7 miles)
  • Region:  RYUKYU ISLANDS, JAPAN
  • Distances:
    • 280 km (175 miles) SSW of Kagoshima, Kyushu, Japan
    • 340 km (210 miles) SSW of Miyazaki, Kyushu, Japan
    • 400 km (245 miles) NNE of Naha, Okinawa, Japan
    • 1170 km (730 miles) SW of TOKYO, Japan
  • Location Uncertainty:  horizontal +/- 5.5 km (3.4 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: us2009njal

Seismic Hazard Map [USGS]

seis nes  30oct09
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

Historic Seismicity [Source: USGS?EHP]

RIJ his seis
Major Tectonic Boundaries: Subduction Zones -purple, Ridges -red and Transform Faults -green

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Posted in earthquake forecast, Eurasian Plate, filipino plate, Japan quakes 2009, Japan quakes history, North American plate, Pacific palte, seismic activity report | Tagged: , , , , , , , , , | 4 Comments »