3-D finite-difference simulation of seismic fault zone waves - Application to the fault zone structure of the Mozumi-Sukenobu fault, central Japan

Yutaka Mamada, Yasuto Kuwahara, Hisao Ito, Hiroshi Takenaka

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Fault zone waves have the potential to be a powerful tool to reveal the fine structure of a fault zone down to the seismogenic depth. Seismic fault zone waves include head waves, trapped waves and direct body waves propagating in the fault zone. 3-D numerical simulation is necessary to interpret the waveforms in the presence of low-velocity zones with relatively complex fault structure. We computed finite difference (FD) synthetic seismograms to fit the seismograms of explosions, which contain frequencies up to 25 Hz, recorded by a linear seismometer array across the Mozumi-Sukenobu fault, central Japan. We find fault zone head waves, direct P waves propagating within the low-velocity zone and wave trains following the direct P waves associated with the fault for both observed and synthetic waveforms. Thus, modelling of fault zone waves is expected to determine details of complex fault zone structure.

Original languageEnglish
Pages (from-to)1055-1058
Number of pages4
JournalEarth, Planets and Space
Volume54
Issue number11
DOIs
Publication statusPublished - Jan 1 2002
Externally publishedYes

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ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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