In order to recognize the areas of greatest damage from the future earthquakes it is important to know the characteristic properties of the basins such as their geometry and seismic velocities of the basin materials. Influence of the Santa Clara Valley basin on the propagation of the teleseismic P-waves was studied in order to evaluate the possibility of detecting and constraining the basin structure. For each event the orientation of the incoming plane wave was taken into the account. Calculations were repeated using a homogeneous model to evaluate the influence of the model size and the reflections from the model boundaries on the results. Amplitude and the duration of the P-wave coda are also much larger for the stations located above the basins.
Presented results are consistent for all the events studied.
Further work will include the analysis of the P-wave coda duration and its frequency composition to constrain the basin structure. Acknowledgements This research was supported by the USGS grants 99HQGR0057 and 00HQGR0048. Arrival times relative to station 186 were first calculated by crosscorrelation.