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| | Abstract | | Special session: In order to apply geophysical explorations to earthquake disaster prevention, we applied mainly seismic explorations like, seismic tomography, microtremor exploration, and seismic reflection methods. These methods enable us to carry out important functions such as evaluation of assumed earthquake ground motion, cumulative displacement of bedrocks caused by activities of fault, and estimations of depth to the plate boundary in capital regions. On the other hand, electrical and electromagnetic methods have been performed by various research organizations to survey geological structures at the Nojima fault which was activated after the South Hyogo earthquake, and the Itozawa fault and Yunodake fault which were activated one month after the Northeastern Pacific offing earthquake. However, it is thought that contributions to earthquake disaster prevention using the electrical and electromagnetic methods are indistinct in comparison with the seismic explorations. In this report, the application of electrical and electromagnetic methods to earthquake disaster prevention based on the author's case studies at the active fault sites is considered. |
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