Magnitude 7.4 - EAST OF THE KURIL ISLANDS

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2009 January 15 17:49:39 UTC

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Earthquake Details

  • This event has been reviewed by a seismologist.
Magnitude7.4
Date-Time
Location46.862°N, 155.156°E
Depth36 km (22.4 miles) set by location program
RegionEAST OF THE KURIL ISLANDS
Distances435 km (270 miles) S of Severo-Kuril'sk, Kuril Islands, Russia
595 km (370 miles) ENE of Kuril'sk, Kuril Islands
1785 km (1110 miles) NE of TOKYO, Japan
7245 km (4500 miles) NE of MOSCOW, Russia
Location Uncertaintyhorizontal +/- 3.6 km (2.2 miles); depth fixed by location program
ParametersNST=369, Nph=369, Dmin=731.2 km, Rmss=0.87 sec, Gp= 14°,
M-type=regional moment magnitude (Mw), Version=U
Source
  • USGS NEIC (WDCS-D)
Event IDus2009bwa8
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Earthquake Summary

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Tectonic Summary

The Kuril Islands earthquake of January 15th, 2009 occurred as a result of thrust faulting within the Pacific plate. The event occurred near the outer-rise of the Pacific plate about 30 km to the east of where the Pacific plate subducts beneath the Okhotsk plate. In this region, the Pacific plate moves northwest with respect to the Okhotsk plate with a velocity of about 90 mm/yr.

Large and great earthquakes are not uncommon in this region. The location of this event is approximately 90 km to the northeast of the Mw 8.1 outer rise earthquake of January 13th 2007, which occurred as a result of normal faulting near the Pacific plate outer-rise. On November 15th 2006, an Mw 8.3 subduction-related thrust earthquake occurred approximately 160km to the southwest.

Tsunami Information

The earthquake locations and magnitudes cited in NOAA tsunami statements and bulletins are preliminary and are superseded by USGS locations and magnitudes computed using more extensive data sets.

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