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

D. Dutykh; F. Dias

doi:10.1016/j.matcom.2009.08.036

2009

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

MMath. Comp. Sim.

D. Dutykh and F. Dias

Math. Comp. Sim. 80(4): 837-848 (2009)

Open Access

HAL Version DOI

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

physics.flu-dynphysics.comp-phphysics.geo-phphysics.ao-phPhysics

Bibliographic record

Journal: Math. Comp. Sim.

Volume: 80

Issue: 4

Pages: 837-848

DOI: 10.1016/j.matcom.2009.08.036

arXiv: 0709.3725

HAL: hal-00174439

BibTeX Citation

@article{Dutykh2009tsunamigeneration,
  author = {Dutykh, D. and Dias, F.},
  title = {Tsunami generation by dynamic displacement of sea bed due to dip-slip faulting},
  journal = {Math. Comp. Sim.},
  year = {2009},
  volume = {80},
  number = {4},
  pages = {837--848},
  doi = {10.1016/j.matcom.2009.08.036},
  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 = {physics.flu-dyn, physics.comp-ph, physics.geo-ph, physics.ao-ph, Physics}
}