Abstract
We proposed a procedure of evaluating fault parameters for predicting strong motions from intra-slab earthquakes. First, we studied the regionality and depth dependency of short-period spectral level of intra-slab earthquakes. We found the difference of the short-period spectral level between the Pacific Ocean plate and the Philippine Sea plate. Therefore we proposed three procedures to evaluate fault parameters which could be applied to arbitrary short-period level. We compared these procedures in terms of fitness of the ground motion evaluation results to the observed records and of applicability to the strong motion prediction. Finally, we selected the most appropriate procedure of evaluating fault parameters for predicting strong motions. We also proposed a procedure of evaluating fault parameters considering the difference in the short-period spectral level between the Pacific Ocean plate and the Philippine Sea plate.
