caa a22 4500 47704719X CHVBK 20180405111333.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00882063 doi (NATIONALLICENCE)springer-10.1007/BF00882063 Attenuation operators and complex wave velocities for scattering in random media [Elektronische Daten] [Y. Fang, G. Müller] The concept of attenuation operators and complex velocities is applied to scattering attenuation in two and three dimensions, using the minimum-phase assumption for the attenuation operator. Acoustic 2D finite-difference computations of synthetic seismograms show, that the attenuation operator describes well the decay and lowpass filtering of the averaged wave form, which follows from averaging travel-time-corrected wave forms along the wave front. In the case of exponential random media, analytical forms of the attenuation operators and complex velocities are available. The complex velocities are incorporated into the reflectivity method. As an application, synthetic seismograms are presented for theS n wave, attenuated by lithospheric velocity and density fluctuations. The limitations of attenuation operators and complex velocities for scattering are also discussed. With these quantities it is not possible to model phenomena related to the scattered waves themselves, such as amplitude and travel-time fluctuations along the wave front, codas and precursors. Birkhäuser Verlag, 1996 Wave scattering nationallicence attenuation nationallicence random media nationallicence reflectivity method nationallicence Fang Y. Institute of Meteorology and Geophysics, Feldbergstr. 47, D-60323, Frankfurt am Main, Germany aut Müller G. Institute of Meteorology and Geophysics, Feldbergstr. 47, D-60323, Frankfurt am Main, Germany aut pure and applied geophysics Birkhäuser-Verlag 148/1-2(1996-03-01), 269-285 0033-4553 148:1-2<269 1996 148 24 https://doi.org/10.1007/BF00882063 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00882063 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fang Y. Institute of Meteorology and Geophysics, Feldbergstr. 47, D-60323, Frankfurt am Main, Germany aut NATIONALLICENCE 700 1- Müller G. Institute of Meteorology and Geophysics, Feldbergstr. 47, D-60323, Frankfurt am Main, Germany aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 148/1-2(1996-03-01), 269-285 0033-4553 148:1-2<269 1996 148 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer