Aftereffects of subduction-zone earthquakes: Potential tsunami hazards along the Japan sea coast

Koji Minoura, Daisuke Sugawara, Tohru Yamanoi, Tsutomu Yamada

Research output: Contribution to journalReview articlepeer-review

7 Citations (Scopus)

Abstract

The 2011 Tohoku-Oki Earthquake is a typical subduction-zone earthquake and is the 4th largest earthquake after the beginning of instrumental observation of earthquakes in the 19th century. In fact, the 2011 Tohoku-Oki Earthquake displaced the northeast Japan island arc horizontally and vertically. The displacement largely changed the tectonic situation of the arc from compressive to tensile. The 9th century in Japan was a period of natural hazards caused by frequent large-scale earthquakes. The aseismic tsunamis that inflicted damage on the Japan Sea coast in the 11th century were related to the occurrence of massive earthquakes that represented the final stage of a period of high seismic activity. Anticompressive tectonics triggered by the subduction-zone earthquakes induced gravitational instability, which resulted in the generation of tsunamis caused by slope failing at the arc-back-arc boundary. The crustal displacement after the 2011 earthquake infers an increased risk of unexpected local tsunami flooding in the Japan Sea coastal areas.

Original languageEnglish
Pages (from-to)91-102
Number of pages12
JournalTohoku Journal of Experimental Medicine
Volume237
Issue number2
DOIs
Publication statusPublished - 2015

Keywords

  • Aseismic tsunami
  • Japan sea
  • Numerical simulation
  • Slope failing
  • Subduction-zone earthquake

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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