| 講演要旨(和文) | | 巨大地震による被害推定を行う上で，広域における広帯域の地震動特性をより正確に評価できるようにすることは重要である．そのためには，より高度化された地盤構造モデルの構築が重要な課題の一つである．本検討では，昨年度に常時微動観測を実施した群馬県および栃木県を対象として，ボーリング調査結果に基づいて作成された既往の初期地盤モデル（地質モデル）を参考に，地震観測記録および常時微動観測記録を可能な限り収集した上で，S波速度構造モデルのチューニングを行い，当該地域における浅部・深部統合地盤モデルの高度化を試みた． |
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| | 講演要旨(英文) | | In order to estimate damages caused by strong ground motions from a mega-thrust earthquake, it is important to evaluate broadband ground-motion features in wide area. To realize it, it is necessary to sophisticate subsurface structure models, on which shallow and deep subsurface structures are integrated. In this study, at first, we collected as many records as possible obtained by microtremor and earthquake observation in Gunma and Tochigi Prefecture. And then, using geological models based on the results of boring surveys as reference, subsurface structure model from seismic bedrock to ground surface was improved based on records of microtremor and earthquake observation in those areas. |
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