Long-Period Ground Motion Simulation in Fukuoka Area, Japan Using a 3D Model by Microtremor Array Explorations Around School Sites

Abstract eng:
In this study we carried out long-period ground motion FD simulations during a middle magnitude earthquake using the 3D basin model by some previous studies in the Fukuoka area, Japan. Because the model has some interpolations in space, our purpose is a reconstruction of the model based on the comparison with synthetic records and observed one, and microtremor array explorations of the area around schools including a contribution to science education in near future. Although the long-period modeling indicated a reasonable reproduction of the observed records in generally, some disagreements of the records at the basin site existed. The microtremor explorations leaded some 1D S-wave velocity structures; the basin maximum depth with 2 layers of the Vs 0.8km/s and 1.6km/s is about from 0.6 to 0.8km. These results help us to reconstruct of the 3D basin model, we will be able to prepare the renewed model.

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