Potential tsunamigenic faults of the 2011 off the Pacific coast of Tohoku Earthquake

Takeshi Tsuji, Yoshihiro Ito, Motoyuki Kido, Yukihito Osada, Hiromi Fujimoto, Juichiro Ashi, Masataka Kinoshita, Toshifumi Matsuoka

    Research output: Contribution to journalArticlepeer-review

    57 Citations (Scopus)

    Abstract

    Faults related to the tsunamigenic 2011 Tohoku-Oki Earthquake (M w9.0) were investigated by using multichannel seismic reflection data acquired in 1999 and submersible seafloor observations from 2008. The location of the fault system interpreted in the seismic reflection profile is distributed around the area with largest slip and tsunami induction of the 2011 event. Cold-seep communities along the trace of the branch reverse fault and a high scarp associated with the trace of a normal fault suggest current activity on these faults. We interpret the fault system in the seismic profile as a shallow extension of the seismogenic fault that may have contributed to the resulting huge tsunami.

    Original languageEnglish
    Pages (from-to)831-834
    Number of pages4
    Journalearth, planets and space
    Volume63
    Issue number7
    DOIs
    Publication statusPublished - 2011

    Keywords

    • 2011 Tohoku-Oki Earthquake
    • Cold-seep communities
    • High scarp
    • Seafloor observation
    • Seismic reflection data
    • Tsunamigenic faults

    ASJC Scopus subject areas

    • Geology
    • Space and Planetary Science

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