Finite element modeling of the July 12, 1993 Hokkaido Nansei-Oki tsunami

Edward P. Myers, António M. Baptista

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

A fault plane model and a finite element hydrodynamic model are applied to the simulation of the Hokkaido Nansei-Oki tsunami of July 12, 1993. The joint performance of the models is assessed based on the overall ability to reproduce observed tsunami waveforms and to preserve mass and energy during tsunami propagation. While a number of observed characteristics of the waveforms are satisfactorily reproduced (in particular, amplitudes and arrival times at tidal gauges relatively close to the source, and general patterns of energy concentration), others are only marginally so (notably, wave periods at the same gauges, and wave heights along Okushiri); differences between observations and simulations are traceable to both the fault plane and the hydrodynamic models. Nonnegligible losses of energy occur throughout the simulated tsunami propagation. These losses seem to be due to a combination of factors, including numerical damping and possible deficiencies of the shallow water equations in preserving energy.

Original languageEnglish (US)
Pages (from-to)769-801
Number of pages33
JournalPure and Applied Geophysics PAGEOPH
Volume144
Issue number3-4
DOIs
StatePublished - Sep 1 1995

Keywords

  • Hokkaido Nansei-Oki
  • energy conservation
  • finite element modeling
  • tsunami

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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