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

Edward P. Myers, Antonio Baptista

Research output: Contribution to journalArticle

19 Citations (Scopus)

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 1995

Fingerprint

Tsunamis
tsunami
fault plane
modeling
Gages
energy
gauge
waveforms
Hydrodynamics
hydrodynamics
shallow-water equation
propagation
wave height
shallow water
arrival time
preserving
damping
simulation
arrivals
Damping

Keywords

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

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Engineering(all)
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Finite element modeling of the July 12, 1993 Hokkaido Nansei-Oki tsunami. / Myers, Edward P.; Baptista, Antonio.

In: Pure and Applied Geophysics PAGEOPH, Vol. 144, No. 3-4, 09.1995, p. 769-801.

Research output: Contribution to journalArticle

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