Computer Science – Performance
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3109611b&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 9, CiteID L09611
Computer Science
Performance
Seismology, Seismology: Nuclear Explosion Seismology, Seismology: Surface Waves And Free Oscillations
Scientific paper
Backazimuth estimates derived from surface wave polarization can be used to test association of an observed surface wave with a seismic event. However, commonly used techniques for estimating the backazimuth are subject to a number of errors and are often inaccurate. We evaluate the performance of a new algorithm for determining Rayleigh wave propagation direction from the cross-correlation of the horizontal and Hilbert transformed vertical seismograms. This proves to be more accurate and much less error-prone than current automatic processing procedures, and the cross-correlation value provides a good measure of the reliability of the backazimuth estimate. Consequently, the new algorithm will permit more reliable event association at a lower magnitude threshold.
Baker Eli G.
Stevens Jeffry L.
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