Simulations of Long-Period Ground Motions during the 1995 Hyogoken-Nanbu ( Kobe ) Earthquake using 3 D Finite Element Method

Long-period strong motions (> 0.9 second) are simulated in the Kobe area for the mainshock (1/17/95) and the aftershock (2/2/95) of the Hyogoken-Nanbu (Kobe) earthquake. In order to model ground motions in the realistic and highly heterogeneous basin structure, an unstructured 3D FEM (Finite Element Method) is used, which runs efficiently on parallel computers. The simulation results show strong 3D basin effects, especially within the disaster belt at the target sites from KBU to RKI.