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Posts Tagged ‘Okinawa-honto Kinkai’

The 9th Powerful Quake Strikes Japan Region

Posted by feww on February 27, 2010

The 9th powerful Earthquake (of a possible series of 14) Measuring 6.9 Mw Strikes Ryukyu Isles, Japan

A powerful earthquake measuring 6.9 Mw struck near Naha, Okinawa, Japan at a depth of 10km on February 26, 2010 at 20:31UTC. The mainshock was followed by a magnitude 5.1 aftershock which occurred on February 27, 2010 at 00:49 UTC, USGS reported.

Background:

Referring to an earlier forecast, FEWW Moderators believe an additional series of 5 or so quakes measuring ≥ 6.0 Mw could strike Japan region in the coming weeks.

10-degree Map Centered at 25°N,130°E


Earthquake Location Map. Source: USGS/EHP. Map enhanced by FEWW.


Earthquake Location Map. Source: USGS/EHP.


Political Map of Japan.

Earthquake Information Issued by JMA at 05:31 JST 27 Feb 2010

Occurred at (JST)

Latitude

Longitude

Depth

Mag.

Region Name

5:31 JST 27 Feb 2010

26.3ºN

128.2ºE

10km

6.9Mw

Okinawa-honto Kinkai

Approximate Distances (USGS):

  • 80 km (50 miles) ESE of Naha, Okinawa, Japan
  • 455 km (285 miles) ENE of Ishigaki-jima, Ryukyu Islands, Japan
  • 665 km (415 miles) SSW of Kagoshima, Kyushu, Japan
  • 1530 km (950 miles) SW of TOKYO, Japan

Tsunami Details

At 05:33 JST 27 Feb 2010   JMA Issued a Tsunami Warning for

  • OKINAWA ISLANDS

Residents were advised to:  “Evacuate from the seashore immediately to the safe places near the above coasts.”

A Tsunami Advisory was issued  for

  • AMAMI ISLANDS AND TOKARA ISLANDS
  • DAITOJIMA AREA
  • MIYAKOJIMA AND YAEYAMA AREA

At 07:01 JST 27 Feb 2010 JMA canceled all tsunami warnings and advisories: “No tsunami damage at the above coasts though there may be slight sea level changes from now on.”

JMA Tsunami code:
Tsunami Warning: “Tsunami height is expected to be up to 2 meters, keep watch on tsunamis.”
Tsunami Advisory: “Tsunami height is expected to be about 0.5 meters, pay attention to tsunamis.”

Fire-Earth anticipates intense (above average) seismic activity and volcanic unrest/activity in the Japan Region throughout 2010 and beyond.

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