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- W2068571834 abstract "Seismic wave attenuation is caused by two major factors, scattering attenuation and intrinsic absorption. A method to separate these two factors from total attenuation is proposed for a case where scattering is isotropic and the random distribution of scatterers and that of absorbers are uniform. The seismic waves recorded at a station from an earthquake can be divided into three portions: a direct wave plus an earlier part of coda waves, a middle part of coda waves and a later part of coda waves. The latter two portions are composed of scattered waves only. The time integral of energy density of each portion is numerically simulated based on the Monte-Carlo method, and is plotted against hypocentral distance. The curves of integrated energy are very sensitive to the seismic albedo which is the ratio of scattering loss to the total attenuation. We offer a set of curves of the integrated energy vs. hypocentral distance for different values of the seismic albedos and different strengths of total attenuation. These curves make it possible to evaluate separately the scattering strength and intrinsic absorption by comparison of the time integrals of actually observed band-pass filtered seismogram's power with the simulated curves." @default.
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- W2068571834 date "1991-01-01" @default.
- W2068571834 modified "2023-10-04" @default.
- W2068571834 title "Numerical basis of the separation of scattering and intrinsic absorption from full seismogram envelope. A monte-carlo simulation of multiple isotropic scattering." @default.
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- W2068571834 doi "https://doi.org/10.2467/mripapers.42.65" @default.
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