Determination of Seismic Source Parameters from Frequency Dependent Rayleigh and Love Wave Radiation Patterns.

摘要

Both exhaustive and non-linear spectral fitting procedures are applied to far-field surface wave data for determining seismic source parameters,especially depth. These procedures were applied to a series of events with decreasing control on the source parameters. High quality Rayleigh wave data from the Southeastern Missouri Earthquake of October 21, 1965was analyzed,and the parameter corroboration with independent estimates was good,with excellent spectral fits. Two low magnitude (mb = 4.1) Italian events were analyzed individually and by taking spectral ratios. Six events from Sinkiang were analyzed,again using both techniques. Initial efforts are directed towards determining the importance of the parameter variations;it was found that depth has the greatest effect on the shape of the spectra. (Modified author abstract)