台湾集集地震記録に基づく地震動のマクロ空間相関特性

概要

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Evaluating macro-spatial correlation of seismic ground motion for wide area is very important for earthquake damage prediction and portfolio analysis in which simultaneous damage in different sites has to be taken into consideration. In this study, focused on is the residual value between observed and predicted ground motion. The spatial correlation of the residual value is modeled assuming that the correlation depends only on the relative distance between two sites. The strong motion records of the 1999 Chi-Chi Earthquake are used for this analysis since very high-dense observation has been made throughout the Taiwan Island. As the result, the correlation length which represents the spatial correlation structure of the residual value is found about 14-30km for this particular earthquake event.
2003-03-30