Comparison of techniques that use the single scattering model to compute the quality factorQ from coda waves |
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| Authors: | David A Novelo-Casanova W H K Lee |
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| Institution: | (1) Instituto de Geofisica, Universidad Nacional, Autónoma de México, Ciudad Universitaria, 04510 México, D.F., México;(2) U.S. Geological Survey, 345 Middlefield Road, MS 977, 94125 Menlo Park, CA, USA |
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| Abstract: | Using simulated coda waves, the resolution of the single-scattering model to extract codaQ (Q
c
) and its power law frequency dependence was tested. The back-scattering model ofAki andChouet (1975) and the single isotropic-scattering model ofSato (1977) were examined. The results indicate that: (1) The inputQ
c
models are reasonably well approximated by the two methods; (2) almost equalQ
c
values are recovered when the techniques sample the same coda windows; (3) lowQ
c
models are well estimated in the frequency domain from the early and late part of the coda; and (4) models with highQ
c
values are more accurately extracted from late code measurements. |
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| Keywords: | CodaQ attenuation scattering coda waves seismic waves |
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