Near Field Small Earthquake Long Period Array

This final report describes the accomplishments acheived during the last year efforts towards a better understanding of the seismic radiation from earthquakes. Applying the techniques discussed in earlier reports on calculating the synthetic response generated by shear dislocation sources in a layered media, an effort has been made to separate source effects from those due to propagation in the earth. The main objective here is an accurate scaling law of duration versus moment to be used in discrimination studies. The observations used in this report are of two types, those that are large enough to be studied teleseismically where one must separate the phases P, sub pP and sub sP etc, and those that are too small to be observed at large distances and must be studied locally. Thus the efforts have been divided into two sections, to model local broadband observations of moderate size earthquakes, and secondly, to apply recently developed generalized inversion theory to the problem of obtaining source determinations based on teleseismic long and short period body waves. Sponsored in part by DARPA.