HR: 0830h
AN: S31C-0780    [PDF]
TI: Array Averaged Particle Motion and Polarization for Southern California
AU: * Otero, J D
EM: jdotero@ucsd.edu
AF: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography: University of California, San Diego, 9500 Gilman Dr, La Jolla, Ca 92093-0225
AU: Vernon, F L
EM: flvernon@ucsd.edu
AF: Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography: University of California, San Diego, 9500 Gilman Dr, La Jolla, Ca 92093-0225
AU: Pavlis, G
EM: pavlis@indiana.edu
AF: Department of Geological Sciences Indiana University, 1001 East 10th St, Bloomington, IN 47405-1405
AU: Schulte-Pelkum, V
EM: veraschulte-pelkum@colorado.edu
AF: University of Colorado at Boulder, 216 UCB, Boulder, CO 80309-0216
AB: We measure array-averaged particle motion and polarization for teleseismic P-waves within the large aperture ($\sim$~70 km) Anza Broadband Array (http://eqinfo.ucsd.edu). Using three component Anza seismic data and a multi-wavelet method developed by {\it Bear, et al.}, we compare our results to {\it Schulte-Pelkum, et al.} more traditional cross correlation techniques. The applied multi-wavelet technique, a hybrid of Fourier and time-domain principal component methods yields insights into the relationships between phase velocity (i.e. the slowness vector) and particle motion which are not as attainable from traditional techniques. As seen in previous studies, we expect to find longitudinal departures in P wave particle motion due to regional anisotropy. Examination of thirteen events (5.1$<$ Mb $<$6.1) yields comparable particle deviations for both methods, yet significant differences exist in frequency dependence of these events.
DE: 7212 Earthquake ground motions and engineering
DE: 7260 Theory and modeling
DE: 7294 Instruments and techniques
SC: Seismology [S]
MN: 2003 Fall Meeting