Key elements of regional seismic velocity models for long period ground motion simulations |
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| Authors: | Thomas M Brocher |
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| Institution: | (1) U.S. Geological Survey, 345 Middlefield Road, MS 977, Menlo Park, CA 94025, USA |
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| Abstract: | Regional 3-D seismic velocity models used for broadband strong motion simulations must include compressional-wave velocity
(Vp), shear-wave velocity (Vs), intrinsic attenuation (Qp, Qs), and density. Vs and Qs are the most important of these parameters
because the strongest ground motions are generated chiefly by shear- and surface-wave arrivals. Because Vp data are more common
than Vs data, many researchers first develop a Vp model and convert it to a Vs model. I describe recent empirical relations
between Vs, Vp, Qs, Qp, and density that allow velocity models to be rapidly and accurately calculated.
The U. S. government reserves the right to retain a non-exclusive, royalty free license in and to any copyright. |
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| Keywords: | Seismic Velocity Attenuation Shear Compressional Density |
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