Relative Receiver Functions for Three Different Array Concepts

This technical report summarizes work done during the period December 1979 - May 1980 on the computation of relative receiver functions. Such functions are vitally important to the understanding of explosion or earthquake source functions, since the effects of crustal reverberations, local amplification effects and lateral variations in attenuation near seismic stations cannot otherwise be separated from source or source crustal properties. Two steps are involved in the calculation. Trace deconvolutions generated by spectral ratios are averaged in the log-spectral domain. Then the relative receiver functions are computed for all stations in an array by use of a non- linear recursive technique. The result is a filter which may be used to model near receiver contributions to synthetic seismograms of stations in the array. Results are presented for three different array concepts, including a small array of a few kilometer aperture, an array made up of all of the WWSSN stations in the western U.S., and an array made up of all SRO stations in a usable distance range about the Eastern Kasakh test site. In each case, the methods are applied successfully, with the primary limitations being data availability. Author