Reexamination of the A.D. 869 Jogan earthquake size from tsunami deposit distribution, simulated flow depth, and velocity

DOI Web Site 被引用文献52件 オープンアクセス
  • Yuichi Namegaya
    Geological Survey of Japan; National Institute of Advanced Industrial Science and Technology; Tsukuba Japan
  • Kenji Satake
    Earthquake Research Institute; University of Tokyo; Tokyo Japan

書誌事項

タイトル別名
  • REEXAMINATION OF AD 869 JOGAN EARTHQUAKE
公開日
2014-04-01
権利情報
  • http://doi.wiley.com/10.1002/tdm_license_1.1
DOI
  • 10.1002/2013gl058678
公開者
American Geophysical Union (AGU)

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説明

The rupture parameters and magnitude of the A.D. 869 Jogan earthquake, a predecessor of the 2011 Tohoku earthquake, were previously estimated by matching tsunami deposit distributions with simulated inundation areas. The tsunami inundation associated with the 2011 Tohoku earthquake, however, extended farther inland than the sandy tsunami deposits. Numerical simulation of the 2011 tsunami indicated that flow depths and velocities were approximately 1 m and 0.6 m/s, respectively, at the most inland sand deposit sites on the Ishinomaki and Sendai plains. While these values depend on the assumed bottom roughness, we used these values to compare tsunami deposits and inundation simulation of the 869 Jogan earthquake from both uniform-slip and 2011-type variable-slip fault models. The results showed that the rupture length of the 869 Jogan earthquake was at least 200 km and its minimum moment magnitude was 8.6.

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