Coseismic Tsunami simulation assuming the displacement of high-angle branching active faults identified on the continental slope around the Japan trench

Shota Muroi, Takashi Kumamoto

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The aim of this study is to demonstrate the tsunami potential caused by high-angle branching faults with relatively low net slip compared to that of the 2011 off the Pacific coast of Tohoku (Tohoku-oki) earthquake of Mw9.0, located in the upper part of the mega-thrust along the Japan Trench where the Tohoku-oki earthquake ruptured, as deduced from the distribution of active faults illustrated by a bathymetric geomorphological study and seismic profile records (Nakata et al. Active faults along Japan Trench and source faults of large earthquakes. http://www.jaee.gr.jp/event/seminar2012/eqsympo/pdf/papers/34.pdf. 19 Dec 2012). The results show that the expected tsunami from high-angle branching faults becomes about one and a half times as high as the case of low-angle thrust faults. This demonstrates the importance of the distribution of high-angle branching faults on the continental slope and their subsurface structure in tsunami hazard assessment.

Original languageEnglish
Title of host publicationEarthquakes, Tsunamis and Nuclear Risks
Subtitle of host publicationPrediction and Assessment Beyond the Fukushima Accident
PublisherSpringer Japan
Pages55-63
Number of pages9
ISBN (Electronic)9784431558224
ISBN (Print)9784431558200
DOIs
Publication statusPublished - Jan 1 2016

Keywords

  • High-angle branching faults
  • Japan trench
  • Tsunami potential

ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Science(all)
  • Earth and Planetary Sciences(all)
  • Mathematics(all)

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