Modeling of the Subsurface Structure from the Seismic Bedrock to the Ground Surface for a Broadband Strong Motion Evaluation
Shigeki Senna*, Takahiro Maeda*, Yoshiaki Inagaki**,
Haruhiko Suzuki**, Hisanori Matsuyama**, and Hiroyuki Fujiwara*
*National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai,Tsukuba, Ibaraki 305-0006, Japan
**OYO Corporation, 43 Miyukigaoka, Tsukuba, Ibaraki 305-0841, Japan
Sophisticated predictions of strong ground motion are vital when constructing structure models that enable us to evaluate broadband ground motion features. Such models should integrate subsurface structure models for strata shallower than engineering bedrock and deep structuremodels for strata even deeper. Both such models used to be separately modeled separately so that observation data could be reproduced. In this study, we have created a subsurface structure model applicable from seismic bedrock to ground surface for individual Japanese individual prefectures, e.g., Chiba and Ibaragi, in attempts to sophisticate subsurface structure models. This paper describes how we created these models and reviews our results.
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