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Detailed Reference Information |
Hu, G., Menke, W. and Powell, C. (1994). Polarization tomography for P wave velocity structure in southern California. Journal of Geophysical Research 99: doi: 10.1029/93JB01572. issn: 0148-0227. |
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We develop a tomographic inversion method that uses teleseismic P wave polarization data to obtain velocity structure. Polarization inversion has some intrinsic advantages over travel time inversion: It is not influenced by source location and origin time errors; it is not sensitive to deep mantle velocity structure and can be used iteratively to improve the tomographic result. Polarization inversion is more sensitive to near-station velocity structure and to velocity gradient and is complementary to travel time inversion in this sense. The method is applied to California Institute of Technology-U. S. Geological Survey southern California array data. The result is generally consistent with previous work and also reveals that the high-velocity feature beneath the Transverse Ranges is bounded between 40 and 200 km depths and possibly has a second small piece at about 300 km depth. The slow velocity anomaly under the Salton Trough is limited to shallow depths, less than about 60 km. ¿ American Geophysical Union 1994 |
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Abstract |
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Keywords
Seismology, Lithosphere and upper mantle, Seismology, Body wave propagation, Seismology, Instruments and techniques |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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