Localization of strong ground motions : A possible cause of localized damage during the 1995 M=7.2 Kobe earthquake

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概要

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• Extremely heavy damage in Kobe City of the 1995 M=7.2 Hyogo-ken Nanbu (Kobe) earthquake was localized in a narrow zone consisting of small patches with the size of several tens to hundreds of meters. We present a model that the heterogeneous uppermost crustal structure caused localization of seismic waves, which was similar to Anderson localization known in quantum physics, and this localization caused the localized damage. One-dimensional numerical calculations showed that localization of seismic waves could occur when the medium is heterogeneous. The result also showed that the localization of waves of high frequencies up to 3Hz would play an important role in generating strong motion damage.

• 日本学士院の論文

著者

• KAMOGAWA Masashi

  Department of Physics, Tokyo Gakugei University

• Ouchi Toru

  Research Center For Urban Safety And Security Kobe University

• HUANG Qinghua

  International Frontier Research Group on Earthquakes, RIKEN (The Institute of Physical and Chemical

• OUCHI Torn

  Research Center for Urban Safety and Security, Kobe University

• KAMOGAWA Masashi

  Department of Physics, Waseda University

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