2001 Geiyo earthquake

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2001 Geiyo earthquake
2001 Geiyo earthquake is located in Japan
2001 Geiyo earthquake
Date March 24, 2001
Magnitude 6.7 Mw
Depth 50 km
Epicenter 34°04′59″N 132°31′34″E / 34.083°N 132.526°E / 34.083; 132.526
Areas affected Japan
Casualties 2 killed

The 2001 Geiyo earthquake (2001年芸予地震 Nisen-ichi-nen Gēyo Jishin) occurred with a moment magnitude of 6.7 on March 24 at 15:27 local time near Hiroshima, Japan. One person in Hiroshima and one person in Ehime were reported dead. About 3,700 buildings were damaged in the Hiroshima area.[1] Liquefaction was observed in Hiroshima[2] and Ehime.[3] Power outage occurred in the prefectures of Hiroshima, Ehime, Okayama, Yamaguchi, and Kōchi. The maximal intensity was shindo lower 6 in Hiroshima.[4] This earthquake could be felt along the eastern and southern coasts of South Korea.[5]

The released seismic moment of the earthquake was 1.3×1019 Nm. This earthquake is a normal faulting in-slab event within the subducting Philippine Sea Plate.[6] The slip of the earthquake was estimated to be about 1.5–2.4 meters (4 ft 11 in–7 ft 10 in). The locations of aftershocks were distributed roughly in N-S direction.[7] It has been suggested that this earthquake was related to the dehydration of the Philippine Sea Plate slab.[8]

In this region, a strong earthquake has occurred in 1905, which was also an in-slab event within the subducting plate.[9]

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