経験的グリーン関数法を用いた2000年鳥取県西部地震の震源のモデル化と強震動シミュレーション

概要

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In the 2000 Tottori-ken Seibu earthquake, many strong ground motions of the main-shock and the aftershocks have been observed at a lot of stations including near-source area. In this study, we attempted to construct a source model for broad-band strong ground motions by the forward modeling using the empirical Green's function method. We derived the best source model that consists of two asperities and background after several trials referring to the inverted source model by Sekiguchi and Iwata (2001). Two asperities are located in shallow and deep parts at the southeastern side of the hypocenter. We found that strong ground motions at near-source area were controlled by the areas and stress drops of two asperities. Relation between combined area of asperities and seismic moment of the best source model is in close agreement with the empirical relation by Somerville et al. (1999).
社団法人日本建築学会の論文
2002-11-30