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Bulletin of the Seismological Society of America; December 1987; v. 77; no. 6; p. 2181-2191
© 1987 Seismological Society of America
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Radiation characteristics of elastodynamic line sources buried in layered media with periodic interfaces. I. SH- wave analysis

VIJAY K. VARADAN, AKHLESH LAKHTAKIA, VASUNDARA V. VARADAN and CHARLES A. LANGSTON

LABORATORY OF ELECTROMAGNETIC AND ACOUSTIC RESEARCHDEPARTMENT OF ENGINEERING SCIENCE AND MECHANICSTHE PENNSYLVANIA STATE UNIVERSITY, UNIVERSITY PARK, PENNSYLVANIA 16802
DEPARTMENT OF GEOSCIENCES THE PENNSYLVANIA STATE UNIVERSITY, UNIVERSITY PARK, PENNSYLVANIA 16802

Abstract

Using the T matrix method, or the extended boundary condition, the solution for a class of problems involving an SH line source in an elastic wave guide is determined. The boundaries of the wave guide may be periodically corrugated and the wave guide may be embedded between elastic media. Numerical results are given for a seismically interesting case of wave propagation in a one-layer crustal model over a mantle half-space with a corrugated free surface representing the Basin and Range topography in the Western United States. Analysis of the scattered fields at the surface, and of the fields radiated into the half-space, shows complicated field behavior, even with sinusoidal free surface corrugation. These results are directly applicable to regional wave propagation and scattering.




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V. K. VARADAN, A. LAKHTAKIA, V. V. VARADAN, and C. A. LANGSTON
Radiation characteristics of elastodynamic line sources buried in layered media with periodic interfaces. II. P- and SV-wave analysis
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