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Published February 2004 | Published
Journal Article Open

Site response from incident Pnl waves


We developed a new method of determining site response and amplification for use in hazard analysis and station corrections. The method employs the conversion of P to S energy beneath a soft-rock station, which results in complex receiver functions that are frequency and amplitude dependent. At low frequencies (<0.1 Hz), the ratio of vertical to radial energies for Pnl appear uniform across the TriNet array, where shallow structures can be neglected. Ratios of high-frequency energies (>0.5 Hz) can be normalized to these low-frequency levels to quantify the amount of high-frequency amplification. Our results agree with previous studies of the Los Angeles Basin and provide the means of calibrating station responses at high frequencies.

Additional Information

© 2004 Seismological Society of America. Manuscript received 22 July 2003. This research was supported by the U.S. Geological Survey under Grant Number 02HQGR0063. The authors would like to thank Hiroo Kanamori for helpful discussions. This is Contribution Number 8954, Division of Geological and Planetary Sciences, California Institute of Technology.

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