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Volume 54 Supplement 11

Special Issue: Slip and Flow Processes in and below the Seismogenic Region

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

Earth, Planets and Space volume 54, pages 1055–1058 (2002)Cite this article

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.

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Authors and Affiliations

  1. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 7, 1-1, Higashi 1-Chome, Tsukuba-shi, Ibaraki, 305-8567, Japan

    Yutaka Mamada, Yasuto Kuwahara & Hisao Ito

  2. Department of Earth and Planetary Sciences, Kyushu University, Hakozaki 6-10-1, Fukuoka, 812-8581, Japan

    Hiroshi Takenaka

Authors
  1. Yutaka Mamada
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  2. Yasuto Kuwahara
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  3. Hisao Ito
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  4. Hiroshi Takenaka
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Correspondence to Yutaka Mamada.

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Mamada, Y., Kuwahara, Y., Ito, H. et al. 3-D finite-difference simulation of seismic fault zone waves—Application to the fault zone structure of the Mozumi-Sukenobu fault, central Japan—. Earth Planet Sp 54, 1055–1058 (2002). https://doi.org/10.1186/BF03353301

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  • DOI: https://doi.org/10.1186/BF03353301

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