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

Faults related to the tsunamigenic 2011 Tohoku-Oki Earthquake ( M w 9.0) 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 aro...

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Bibliographic Details
Published in:Earth, planets, and space planets, and space, 2011-01, Vol.63 (7), p.831-834
Main Authors: Tsuji, Takeshi, Ito, Yoshihiro, Kido, Motoyuki, Osada, Yukihito, Fujimoto, Hiromi, Ashi, Juichiro, Kinoshita, Masataka, Matsuoka, Toshifumi
Format: Article
Language:English
Subjects:
Coastal environments
Communities
Earth and Environmental Science
Earth Sciences
Faults
Geology
Geophysics/Geodesy
Letter
Marine
Reflection
Seismic engineering
Seismic phenomena
Submersibles
Tsunamis
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Summary:Faults related to the tsunamigenic 2011 Tohoku-Oki Earthquake ( M w 9.0) 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.
ISSN:1343-8832
1880-5981
DOI:10.5047/eps.2011.05.028