岡崎平野の地下構造調査及び強震動特性

Abstract

The Okazaki Plain located in the Aichi Prefecture is one of most industrial area in Japan, and also the region where severe damages are predicted by the future large earthquakes such as Tokai / Tohnankai earthquakes. Therefore, it is important to take earthquake disaster prevention measures. Therefore, this study estimated the geological structure of the Okazaki plain based on the results of past studies (Geological structure survey by the Aichi Prefecture in 2001-2004 and Microtremor Array Observation). Then in this study strong motions were simulated and compared with observed ones. As a result, the wave pattern and the spectrum almost agreed. There is not the big change of the structure from the north to the south, and each layer is parallel to basement structure. However, the basement is deep in the west side of the plain. The model provided in this article is useful to estimate future strong earthquake motion.