HR: 14:10h
AN: S52H-03    [PDF]
TI: Self-consistent Derivation of Earthquake Source Properties: Method and Examples from Seismic Networks at ANZA, CA, and the Karadere-Duzce faults, Turkey
AU: * Peng, Z
EM: zpeng@terra.usc.edu
AF: Department of Earth Sciences, University of Southern California, 3651 Trousdale Pkwy, Los Angeles, CA 90089-0740 United States
AU: Vernon, F L
EM: vernon@epicenter.ucsd.edu
AF: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0225 United States
AU: Ben-Zion, Y
EM: benzion@terra.usc.edu
AF: Department of Earth Sciences, University of Southern California, 3651 Trousdale Pkwy, Los Angeles, CA 90089-0740 United States
AU: Kilb, D L
EM: dkilb@epicenter.ucsd.edu
AF: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0225 United States
AU: Biasi, G
EM: glenn@seismo.unr.edu
AF: University of Nevada Reno, Seismological Laboratory MS-174, Reno, NV 89557 United States
AB: The functional forms and parameters of the static scaling relation (seismic moment vs. corner frequency) and dynamic scaling relation (seismic moment vs. radiated seismic energy) of earthquakes have been debated for decades. A significant difficulty in determining robust solutions for these source properties is that parameter uncertainties are large for the small earthquakes (M $<$ 3) due to the limited recording bandwidth and severe attenuations of high frequency energy in the near surface layer. These issues can be partially resolved by analyzing a large number of events with a wide range of magnitudes in a self-consistent manner. Large data sets collected by seismic networks near active fault zones provide opportunities for studying earthquake source properties and scaling relations in detail. We are in the process of developing a method that will fit the observed body wave spectra recorded at multiple seismic stations using a Brune (JGR, 1970) omega-square model, and simultaneously apply corrections for the radiation pattern, path and site effects. The method is applied to seismograms collected by the ANZA seismic network in southern California (http://www.eqinfo.ucsd.edu/) and a temporary network around the Karadere-Duzce branch of the North Anatolian fault, which was in operation for 6 months following the 1999 Izmit, Turkey, earthquake. The full methodology and results from those data sets will be presented in the meeting.
DE: 7200 SEISMOLOGY
DE: 7209 Earthquake dynamics and mechanics
DE: 7215 Earthquake parameters
SC: Seismology [S]
MN: 2003 Fall Meeting