Tsunami generation by dynamic displacement of sea bed due to dip-slip faulting

Denys Dutykh and Frédéric Dias

Mathematics and Computers in Simulation (MATCOM), 2009, vol. 80, issue 4, 837-848

Abstract: In classical tsunami-generation techniques, one neglects the dynamic sea bed displacement resulting from fracturing of a seismic fault. The present study takes into account these dynamic effects. Earth’s crust is assumed to be a Kelvin–Voigt material. The seismic source is assumed to be a dislocation in a viscoelastic medium. The fluid motion is described by the classical nonlinear shallow water equations (NSWE) with time-dependent bathymetry. The viscoelastodynamic equations are solved by a finite-element method and the NSWE by a finite-volume scheme. A comparison between static and dynamic tsunami-generation approaches is performed. The results of the numerical computations show differences between the two approaches and the dynamic effects could explain the complicated shapes of tsunami wave trains.

Keywords: Seismic sources; Tsunami; Shallow water equations (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:80:y:2009:i:4:p:837-848

DOI: 10.1016/j.matcom.2009.08.036

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