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Toshihiko Sakashima
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Hiroshi Yamamoto
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Akira Iwamatsu
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Shuichiro Yokota
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Toru Takeshita
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Yasutaka Hayasaka
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Author's Organization:Department of Earth and Planetary Systems Science,Faculty of Science,Hiroshima University Institute of Earth Sciences,Faculty of Science,Kagoshima University Institute of Earth Sciences,Faculty of Science,Kagoshima University Institute of Earth Sciences,Faculty of Science,Kagoshima University Department of Earth and Planetary Systems Science,Faculty of Science,Hiroshima University Department of Earth and Planetary Systems Science,Faculty of Science,Hiroshima University