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: Prediction and Assessment Beyond the Fukushima Accident
PublisherSpringer Japan
Pages55-63
Number of pages9
ISBN (Print)9784431558224, 9784431558200
DOIs
Publication statusPublished - Jan 1 2016

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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)

Cite this

Muroi, S., & Kumamoto, T. (2016). Coseismic Tsunami simulation assuming the displacement of high-angle branching active faults identified on the continental slope around the Japan trench. In Earthquakes, Tsunamis and Nuclear Risks: Prediction and Assessment Beyond the Fukushima Accident (pp. 55-63). Springer Japan. https://doi.org/10.1007/978-4-431-55822-4_4