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First-order reflection/transmission coefficients for unconverted plane P waves in weakly anisotropic media
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SYSNO ASEP 0348409 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title First-order reflection/transmission coefficients for unconverted plane P waves in weakly anisotropic media Author(s) Farra, V. (FR)
Pšenčík, Ivan (GFU-E) ORCID, RIDSource Title Geophysical Journal International - ISSN 0956-540X
Roč. 183, č. 3 (2010), s. 1443-1454Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords body waves ; seismic anisotropy ; wave propagation Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects GA205/08/0332 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000284274700027 DOI 10.1111/j.1365-246X.2010.04794.x Annotation We present approximate formulae for the plane-wave displacement reflection/transmission (R/T) coefficients for interfaces of arbitrary contrast, separating two homogeneous, weakly anisotropic media. They result from boundary conditions requiring continuity of displacement vector and traction, in which coupled S waves are considered as a single S wave and exact quantities are replaced by first-order quantities used in first-order ray tracing. Specifically, the phase velocities, slowness and polarization vectors of P and coupled S waves appearing in the boundary conditions are of the first-order with respect to the deviations of anisotropy from isotropy. Application of the derived R/T coefficients transforms the amplitude of an incident P wave into amplitudes of reflected/transmitted P or coupled S waves. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2011
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