Finite-Difference Simulations of Rayleigh-Wave Scattering by Shallow Heterogeneity.
Abstract
Rayleigh waves normally incident upon 2-D shallow heterogeneity are simulated by the linear finite-difference method to study attenuation, transmission, and reflection of Rayleigh waves and to measure the Rayleigh-to-P and -SV body wave conversion. Transmission, reflection, and scattering depend on the depth, average scale size of the heterogeneity and the amplitude of the spatial fluctuation of velocity. As expected, larger spatial variation in velocity attenuates Rayleigh waves more than smooth media and the attenuation is roughly proportional to the variance of the velocity fluctuation. The attenuation and scattering due to shallow heterogeneity is weaker than attenuation due to moderately rough topography. Keywords: Finite difference; Scattering; Rayleigh wave; Attenuation; Heterogeneity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1987
- Accession Number
- ADA194961
Entities
People
- Keith L. Mclaughlin
- Rong-song Jih