Evolution of the 2011 Tohoku earthquake tsunami on the pacific coast of Hokkaido

Yasunori Watanabe, Yuta Mitobe, Ayumi Saruwatari, Tomohito Yamada, Yasuo Niida

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A numerical computation of the 2011 Tohoku earthquake tsunami was performed to identify fundamental features of the tsunami evolution along the coast of Hokkaido, Japan. Edge waves formed at multiple locations where the refracted tsunami focused, governing local surface oscillations and regional variations in tsunami height along the Pacific coast of Hokkaido. The computation reasonably reproduced the distribution of surveyed tsunami height as well as the time records of surface elevation recorded at ports in Hokkaido. The major features of the frequency spectrum for the 2011 Tohoku tsunami were identical to those for the 2003 Tokachi-oki earthquake tsunami; inherent local properties of surface oscillation caused by the passage of edge waves existed, determined by the local bathymetry.

Original languageEnglish
Article number1250002
JournalCoastal Engineering Journal
Volume54
Issue number1
DOIs
Publication statusPublished - 2012 Mar

Keywords

  • 2011 Tohoku earthquake tsunami
  • Hokkaido
  • edge wave

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modelling and Simulation
  • Ocean Engineering

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