Source model composed of asperities for the 2003 Tokachi-oki, Japan, earthquake (MJMA = 8.0) estimated by the empirical Green's function method

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  • Kamae K.
    Research Reactor Institute, Kyoto University
  • Kawabe H.
    Research Reactor Institute, Kyoto University

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  • Source model composed of asperities for the 2003 Tokachi‐oki, Japan, earthquake (MJMA=8.0) estimated by the empirical Green’s function method

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Abstract

A preliminary source model composed of asperities for the 2003 Tokachi-oki, Japan, earthquake (MJMA = 8.0) was estimated by the empirical Green's function method. The source parameters for three asperities located on the fault plane were determined from the comparisons of the synthesized broad-band ground motions with the observed ones. We found that the pulsive waveforms observed in north direction of the hypocenter were generated by the forward rupture directivity effect. Furthermore, the estimates of the stress parameter for asperities are higher than the averaged ones for past inland and subduction earthquakes.

Journal

  • Earth, Planets and Space

    Earth, Planets and Space 56 (3), 323-327, 2004

    Society of Geomagnetism and Earth, Planetary and Space Sciences, The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences

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