Surface wave tomography from microseisms in Southern California

Details Surface wave tomography from microseisms in Southern California Surface wave tomography from microseisms in Southern California

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3214311s&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 14, CiteID L14311

Physics

123

Seismology: Surface Waves And Free Oscillations, Seismology: Tomography (6982, 8180), Tectonophysics: Instruments And Techniques

Scientific paper

Since it has already been demonstrated that point-to-point seismic propagation Green Functions can be extracted from seismic noise, it should be possible to image Earth structure using the ambient noise field. Seismic noise data from 148 broadband seismic stations in Southern California were used to extract the surface wave arrival-times between all station pairs in the network. The seismic data were then used in a simple, but densely sampled tomographic procedure to estimate the surface wave velocity structure within the frequency range of 0.1-0.2 Hz for a region in Southern California. The result compares favorably with previous estimates obtained using more conventional and elaborate inversion procedures. This demonstrates that coherent noise field between station pairs can be used for seismic imaging purposes.

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