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Site Response from Incident Pnl Waves

Seismological Laboratory
Division of Geological and Planetary Sciences
Mail Code 252-21
California Institute of Technology
Pasadena, California 91125

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.

This article has been cited by other articles:

				Y. Tan and D. Helmberger A New Method for Determining Small Earthquake Source Parameters Using Short-Period P Waves Bulletin of the Seismological Society of America, August 1, 2007; 97(4): 1176 - 1195. [Abstract] [Full Text] [PDF]