Estimation of strong ground motion during the 1923 Konto earthquake considering effects of 3D basin structure

This study was conducted aiming at estimating strong ground motion in the Kanto plain during the1923 Kamo earthquake considering effects of threc-dimensionally irregular h*ucture in the area。first,我们建立一个3d S-wave velocity model for the Kiinto basin from microlremor array measurements.then,characteristics of seismic wave p**pagation and amplification in the basin were investigated usingearthquake records. In particular，complex features of surface wave propagation in a period range longer than 4 seconds was revealedindicating strong effects of basinftiruciure. We, next，simulated earthquake ground motion observed in the tires during small and moderate events usingfinite difference code developed in this study. The complex propagation features were qualitativelyreconstructed,当我们使用3d S-wave velocity model. the same模拟过程was应用于评估strong ground motion of the 1 - 23 Knnlo earthquake。

This study was conducted aiming at estimating strong ground motion in the Kanto plain during the 1923 Kamo earthquake considering effects of threc-dimensionally irregular h*ucture in the area. First, we constructed a 3D S-wave velocity model for the Kiinto basin from microlremor array measurements. Then, characteristics of seismic wave p**pagation and amplification in the basin were investigated using observed earthquake records. In particular, complex features of surface wave propagation in a period range longer than 4 seconds was revealed indicating strong effects of basinftiruciure. We, next, simulated earthquake ground motion observed in the tires during small and moderate events using finite difference code developed in this study. The complex propagation features were qualitatively reconstructed, when we used the 3D S-wave velocity model. The same simulation procedure was applied to estimate strong ground motion of the 1ー23 Knnlo earthquake.