Broadband modeling of the 2002 Denali fault earthquake on the Earth Simulator

Seiji Tsuboi, Dimitri Komatitsch, Chen Ji, Jeroen Tromp

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

We use a spectral-element method implemented on the Earth Simulator in Japan to simulate broadband seismic waves generated by the 3 November 2002 Denali fault earthquake. This Mw=7.9 event is the largest strike-slip earthquake in North America in almost 150 years. The source model is constrained by teleseismic body waves and observed surface offsets. The earthquake was initiated by a small thrust event, and is well characterized by a five-segment fault geometry dominated by right-lateral rupture along 220 km of the Denali fault. We perform the three-dimensional numerical simulations at unprecedented resolution and reveal significantly enhanced ground motions (directivity) toward the conterminous United States for both body and surface waves.

Original languageEnglish (US)
Pages (from-to)305-313
Number of pages9
JournalPhysics of the Earth and Planetary Interiors
Volume139
Issue number3-4
DOIs
StatePublished - Oct 31 2003

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Geophysics
  • Physics and Astronomy (miscellaneous)
  • Space and Planetary Science

Keywords

  • Broadband modeling
  • Denali fault
  • Earth Simulator
  • Spectral-element method

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