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Surface wave tomography from microseisms in Southern California
Author(s) -
Sabra Karim G.,
Gerstoft Peter,
Roux Philippe,
Kuperman W. A.,
Fehler Michael C.
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl023155
Subject(s) - microseism , seismology , seismic noise , geology , surface wave , passive seismic , broadband , inversion (geology) , earth structure , seismic tomography , tomography , seismic wave , ambient noise level , noise (video) , vertical seismic profile , range (aeronautics) , geodesy , remote sensing , geophysics , telecommunications , image (mathematics) , computer science , physics , tectonics , optics , geomorphology , mantle (geology) , sound (geography) , materials science , composite material , artificial intelligence
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.