Abstract
This study deals with variability of seismic source parameters and its influence on simulated ground motions. First, based on the set of earthquake ground motions calculated using a 'recipe' considering the variation of some of the fault parameters, the spatial distribution of the median values and the standard deviations of the simulated ground motions are evaluated and studied. Then, at selected sites we compare the global variability with the variability due to the individual source parameter variations. Finally, a menu for the use of probability-based earthquake ground motions is presented as well as future directions for strong ground motion evaluation.