%0 Journal Article
%A Schwab, Fred
%A Knopoff, Leon
%T Surface waves on multilayered anelastic media
%D 1971
%J Bulletin of the Seismological Society of America
%P 893-912
%V 61
%N 4
%X Surface-wave dispersion computations for perfectly-elastic media are generalized to allow dispersion-attenuation computations for anelastic media. In each layer, frequency-dependent, body-wave phase velocity and attenuation are taken into account directly. For a 50-layer structure, a single Love-wave dispersion-attenuation point can be determined in 0.28 secâ€”the phase velocity containing about 16 significant figures and the phase attenuation about 14, where 16 decimal digits are used in computations on an IBM 360/91 computer. Accuracies of 7 significant figures can be obtained in 0.13 sec. To this latter accuracy, the determination of the Love-wave dispersion and attentuation for an anelastic structure takes about 6.8 times the amount of computation time required to compute the dispersion for the comparable perfectly-elastic structure. The technique is applied to Love waves on an anelastic, radially heterogeneous sphere. A family of low-velocity zone channel waves is identified and investigated. A possible explanation for the disappearance of Lg across large oceanic paths is offered.%U http://bssa.geoscienceworld.org/content/ssabull/61/4/893.full.pdf