2001 Geiyo earthquake

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 maximum intensity was shindo lower 6 in Hiroshima.[4] This earthquake could be felt along the eastern and southern coasts of South Korea.[5]

2001 Geiyo earthquake
UTC time2001-03-24 06:27:53
ISC event1800460
USGS-ANSSComCat
Local dateMarch 24, 2001
Local time15:27
Magnitude6.7 Mw
Depth50 km
Epicenter34.083°N 132.526°E / 34.083; 132.526
TypeNormal
Areas affectedJapan
Casualties2 killed

The released seismic moment of the earthquake was 1.3×1019 Nm. This earthquake is a normal faulting intraslab 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 occurred in 1905, which was also an intraslab event within the subducting plate.[9]

See also

References
  1. "Significant Earthquakes of the World 2001". Earthquake Hazards Program. Archived from the original on April 25, 2015.
  2. Yoshimine, M. "2001 Geiyo Earthquake, Japan". Soil Mechanics Laboratory, Civil Engineering, Tokyo Metropolitan University. Archived from the original on 2012-07-11. Retrieved 2012-01-10.
  3. Sakakibara, Masayuki; Inouchi, Yoshio; Nara, Masakazu (2002). "Liquefaction of reclaimed land in Toyo City, Ehime Prefecture, by the 2001 Geiyo earthquake". Journal of the Geological Society of Japan. 108 (6): XIII–XIV. doi:10.5575/geosoc.108.XIII.
  4. "平成１３年（２００１年）芸予地震について(About Geiyo Earthquake in 2001)" (PDF) (in Japanese). Archived from the original (PDF) on 2011-10-27. Retrieved 2012-01-10.
  5. Hall, K. "At least two die as strong earthquake hits Japan". The Independent. Archived from the original on 28 July 2014.
  6. Miyatake, T.; Yagi, Y.; Yasuda, T. (2004). "The dynamic rupture process of the 2001 Geiyo, Japan, earthquake" (PDF). Geophysical Research Letters. 31: L12612. doi:10.1029/2004GL019721. Archived from the original (PDF) on 2014-07-28. Retrieved 2012-01-10.
  7. "平成13年（2001年）芸予地震（2001年3月24日，M6.7） (2001 Geiyo Earthquake (March 24, 2001, M6.7))" (PDF) (in Japanese).
  8. Zhao, D.; Mishra, O.P.; Sanda, R.; Obara, K.; Umino, N.; Hasegawa, A. (2001). "Seismological Evidence for the Influence of Fluids and Magma on Earthquakes" (PDF). Bulletin of the Earthquake Research Institute University of Tokyo. 76: 271–289. Archived from the original (PDF) on 2014-07-28. Retrieved 2012-01-10.
  9. Hiroshima Crisis Management Supervision; Crisis Management Division. "災害に備えて：地震・津波災害とは (Preparing for a disaster: What is an earthquake / tsunami disaster?)" (in Japanese). Archived from the original on 2013-10-29. Retrieved 2012-05-12.CS1 maint: multiple names: authors list (link)
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