Abstract
We study variations on predicted ground motions of Mw6.8 crustal earthquake caused by concealed faults.
In this article, while we evaluate basic source parameters based on the Recipe for Strong-motion Prediction, we consider variations on dip angle, position of asperities and rupture starting point, average slip of asperities, short-period spectrum level and rupture velocity.
Estimated near-fault ground motions using the above parameters are compared with the ground motion using the parameters established by the committee of cabinet office in Japan.
In conclusion, the spectrum of ground motion using parameters of the cabinet office is generally within the range between that of 90% non-exceeding probability and the average of 345 cases considering variations.
