AN APPLICABILITY STUDY ON EMPIRICAL PREDICTION OF GROUND MOTION INTENSITY IN NEAR SOURCE REGION FROM LARGE EVENTS

Abstract

Applicabilities on the empirical prediction of earthquake ground motion intensities are studied by comparing with observed strong motion records at near-field from large events. The response spectra are predicted as products of the predicted response spectra at seismic-bedrock and the ground amplification factors calculated by using the frequency-dependent Q^<-1> model. Peak accelerations and velocities are predicted from spectrum intensities of the response spectra. Further the attenuation characteristics of the predicted peak ground accelerations and velocities for short fault distances and large magnitudes are estimated by assuming ground structure models from the seismic-bedrock to the surface.