EFFECTS OF DIFFERENT WAYS OF COUNTING FAULT AREA FOR ASPERITY MODEL OF CRUSTAL EARTHQUAKES ON FAULT PARAMETERS AND PREDICTED STRONG GROUND MOTIONS

Abstract

The effects of two different ways of counting fault areas, that are the seismic fault area and the entire ruptured fault area, on the strong ground motions from the faults 30 km and 50 km long were small for peak ground accelerations and comparatively large for peak ground velocities and response spectra in the longer period range. On the other hand, the effects on the strong ground motions from the fault 200 km long were little for peak ground accelerations or peak ground velocities while the effects were a little for response spectra in the period range longer than 3 seconds.