| 講演要旨(和文) | | 本研究では,福岡地域を中心にした九州北部地域における福岡県西方沖地震時の地震動特性を理解するために,まずは差分法の地震動シミュレーションによって地震動評価用の地下構造モデルの構築を目指す.今回の報告では,その過程の第一段階として,単純な地下構造モデルを設定して,震源のモデル化の影響が少ない小規模な余震(2005年福岡県西方沖地震の余震)の地震動シミュレーションを行った結果を報告する. |
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| | 講演要旨(英文) | | The 2005 off west of Fukuoka Prefecture Earthquake damaged around Fukuoka city. Some ground motion records of the aftershocks were observed (e.g. Yamanaka et al.,2005). This report pointed out the 2D and 3D effects of the shallower part of subsurface structure around damaged area. We carried out 3D ground motion simulation for an evaluation of the effect and a construction of the 3D subsurface structure model around the northern part of Kyushu Island. The simulation result indicates a reasonable reproduction of the observed records on the rock site. Although, this report shows only the result of using a simple model, we will report the effects using a detail 3D model. |
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