Effects of the rupture velocity of fault motion, ocean current and initial sea level on the transoceanic propagation of tsunami

Anawat Suppasri, Fumihiko Imamuray, Shunichi Koshimuraz

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Numerical simulation of tsunami is an effective method to reproduce what has occurred in the past and to predict future events for many tsunami-related research issues including warning systems. However, some real phenomena have not been fully integrated into numerical simulations for transoceanic tsunamis such as fault dynamics of rupture velocity, ocean currents, and the initial sea level. Considering the 2004 Indian Ocean tsunami event, this study evaluates the consequences of rupture velocity. Subsequently, numerical experiments were conducted to normalize the effects as represented by non-dimensional parameters. The rupture velocity, ocean current, and initial sea level were simplified to be uniform and common among simulations. Results of the experiment show that the sea depth along the propagation direction, distance from the tsunami source, rupture velocity, and initial sea level impart some considerable effects on a tsunami's arrival time and wave height. Nevertheless, ocean currents have almost no importance for the arrival time or wave height of oceanic propagation of tsunamis.

Original languageEnglish
Pages (from-to)107-132
Number of pages26
JournalCoastal Engineering Journal
Volume52
Issue number2
DOIs
Publication statusPublished - 2010 Jun

Keywords

  • Dynamic effect
  • Fault rupture velocity
  • Initial sea level
  • Ocean current
  • Transoceanic tsunami propagation
  • Tsunami numerical experiment

ASJC Scopus subject areas

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

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