Effects of bathymetry complexity on tsunami propagation: A spherical harmonics approach

Amir Salaree*, Emile A. Okal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper explores the effects on tsunami simulations of the level of detail of the bathymetric grid in use. For this purpose, we expand available bathymetric data sets of the Pacific Basin in spherical harmonics. For realistic scenarios of tsunamis generated by earthquake dislocations, we conclude that an expansion to a maximum degree lmax = 40, corresponding to wavelengths of 1000 km, is sufficient to reproduce the main features of the tsunami wavefield synthesized in deep water, that is, without considering final shoaling and interaction with coastal features.

Original languageEnglish (US)
Pages (from-to)632-647
Number of pages16
JournalGeophysical Journal International
Volume223
Issue number1
DOIs
StatePublished - Oct 1 2020

Keywords

  • Earthquake hazards
  • Numerical modelling
  • Pacific Ocean
  • Tsunami

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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