半経験的手法を用いた猿投-高浜断層帯における強震動予測

Abstract

In this study, strong motion analysis was performed in the case that an earthquake will occur along the Sanage-Takahama fault zone using semi-empirical method( Irikura et al,1986). At first, the method used in this study was confirmed by reproducing the strong motion records in the Mie-ken Hokubu earthquake of April 22, 1998. The small earthquake record (an element event) is necessary for estimating strong motion by using semi-empirical method. However, in the case of the present study, an element event has not been observed. Therefore, an element event was composed by using empirical site amplification effect calculated with the observed records at the K-net sites, relating with source and attenuation characteristics of the event. Strong motion records were composed in some cases that asperity locations were different. It was known that seismic intensities during the earthquake of the Sanage-Takahama fault zone were depended on the locations of asperities. It means that an information on asperities is important for estimating strong motion along a fault.