Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; December 1979; v. 69; no. 6; p. 2025-2036
© 1979 Seismological Society of America
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Autoregressive parameters for a suite of strong-motion accelerograms

ANDREJS JURKEVICS* and TAD J. ULRYCH

DEPARTMENT OF GEOPHYSICS AND ASTRONOMY UNIVERSITY OF BRITISH COLUMBIA, VANCOUVER, BC Canada

Abstract

The time-adaptive technique of Jurkevics and Ulrych (1978) has been used to analyze a suite of rock-site accelerograms recorded during two ML = 6.4 earthquakes in California. One of the parameters which models the earthquake, the innovation variance {sigma}e2, has been found to vary with epicentral distance according to ({sigma}e2)max {propto} D-3.23. The shaking duration exhibits a linear variation with log(D) after a finite distance away from the fault. The above results allow the construction of artificial accelerograms for arbitrary epicentral distances ML = 6.4 earthquakes in California.

Footnotes

* Present address: Del Mar Technical Associates, P.O. Box 1083, Del Mar, California 92014.






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