Physics
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3203310s&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 3, CiteID L03310
Physics
88
Seismology: Surface Waves And Free Oscillations, Seismology: Tomography (6982, 8180), Seismology: Seismic Instruments And Networks (0935, 3025), Tectonophysics: Tomography (6982, 7270)
Scientific paper
It has been demonstrated experimentally and theoretically that an estimate of the Green's function between two seismic stations can be obtained from the time-derivative of the long-time average cross correlation of ambient noise between these two stations. This TDGF estimate from just the noise field includes all tensor components of the Green's function and these Green's function estimates can be used to infer Earth structure. We have computed cross correlations using 1 to 30 continuous days of ambient noise recorded by over 150 broadband seismic stations located in Southern California. The data processing yielded thousands of cross-correlation pairs, for receiver separations from 4-500 km, which clearly exhibit coherent broadband propagating dispersive wavetrains across frequency band 0.1-2 Hz.
Fehler Michael C.
Gerstoft Peter
Kuperman William A.
Roux Philippe
Sabra Karim G.
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