We first evaluated the ground motions for two small earthquakes (M4~5) one occurred just beneath the basin edge at west, and the other occurred at south. We referred to this model together with bouguer anomaly data to construct a detail 3 D basin structure model for Nobi plain, and conducted computer simulations of ground motions. In order to mitigate the potential disasters for future earthquakes, 3 D subsurface structure of Nobi Plain has recently been investigated by local governments. In this area, many large earthquakes occurred in the past, such as the 1891 Nobi earthquake (M8.0), the 1944 Tonankai earthquake (M7.9) and the 1945 Mikawa earthquake (M6.8). We performed large-scale parallel simulations of the seismic wave propagation to understand the complex wave behavior in the 3 D basin structure of the Nobi Plain, which is one of the high population cities in central Japan. ![]() Parallel 3 D Simulation of Seismic Wave Propagation in the Structure of Nobi Plain, Central Japan
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