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Behaviour of rays at interfaces in anisotropic viscoelastic media
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SYSNO ASEP 0348406 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Behaviour of rays at interfaces in anisotropic viscoelastic media Author(s) Vavryčuk, Václav (GFU-E) ORCID, RID Source Title Geophysical Journal International - ISSN 0956-540X
Roč. 181, č. 3 (2010), s. 1665-1677Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords seismic anisotropy ; seismic attenuation ; wave propagation Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects IAA300120801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000277716400033 DOI 10.1111j.1365-246X.2010.04583.x Annotation The behaviour of rays at interfaces in anisotropic viscoelastic media is studied using three different approaches: the real elastic ray theory, the real viscoelastic ray theory and the complex ray theory. In solving the complex eikonal equation, the highest accuracy is achieved by the complex ray theory. The real elastic and viscoelastic ray theories are less accurate but computationally more effective. In all three approaches, the rays obey Snell's law at the interface, but its form is different for each approach. The complex Snell's law constrains the complex tangential components of the slowness vector. The real viscoelastic and elastic Snell's laws constrain the real tangential components of the slowness vector. In the viscoelastic ray theory, the Snell's law is supplemented by the condition of the stationary slowness vector of scattered waves. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2011
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