ATTENUATION RELATIONSHIP BY CONSIDERED THE EFFECT OF DIRECTIVITY BASED ON EQUIVALENT HYPOCENTRAL DISTANCE.

Abstract

A new method considering the effect of directivity, based on the attenuation equation with equivalent hypocentral distance, was proposed. The proposed method can take account of moment magnitude and fault distance in addition to rupture starting point, rupture direction, and slip distribution. The proposed method are applied to the 1995 Kobe earthquake to compare with the observed distribution of seismic intensity for the validation. The distribution of seismic intensity obtained by the proposed method for the hypothetical earthquake scenario is also compared to that by the hybrid simulation method.