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Gaussian beams in inhomogeneous anisotropic layered structures
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SYSNO ASEP 0337233 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Gaussian beams in inhomogeneous anisotropic layered structures Author(s) Červený, V. (CZ)
Pšenčík, Ivan (GFU-E) ORCID, RIDSource Title Geophysical Journal International - ISSN 0956-540X
Roč. 180, č. 2 (2010), s. 798-812Number of pages 15 s. Language eng - English Country GB - United Kingdom Keywords body waves ; seismic anisotropy ; theoretical seismology ; 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 000273666400024 DOI 10.1111/j.1365-246X.2009.04442.x Annotation Gaussian beams, approximate solutions of elastodynamic equation concentrated close to rays of high-frequency seismic body waves, propagating in inhomogeneous anisotropic layered structures, are studied. They have Gaussian amplitude distribution along any straightline profile intersecting the ray. At any point of the ray, the Gaussian distribution of amplitudes is controlled by the 2 × 2 complex-valued symmetric matrix M of the second derivatives of the traveltime field with respect to ray-centred coordinates. Matrix M can be simply determined along the ray if the ray propagator matrix is known and if the value of M is specified at a selected point of the ray. The ray propagator matrix can be calculated along the ray by solving the dynamic ray tracing system twice: once for the real-valued initial plane-wave conditions and once for the real-valued initial point-source conditions. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2010
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