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S-wave splitting from records of local micro-earthquakes in West Bohemia/Vogtland: an indicator of complex crustal anisotropy
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SYSNO ASEP 0313632 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title S-wave splitting from records of local micro-earthquakes in West Bohemia/Vogtland: an indicator of complex crustal anisotropy Title Štěpení S vln studované ze záznamů lokálních mikrozemětřesení v západních Čechách a v oblasti Vogtlandu: projev složité anizotropie zemské kůry Author(s) Vavryčuk, Václav (GFU-E) ORCID, RID
Boušková, Alena (GFU-E) ORCID, RIDSource Title Studia geophysica et geodaetica. - : Geofyzikální ústav AV ČR, v. v. i. - ISSN 0039-3169
Roč. 52, č. 4 (2008), s. 631-650Number of pages 20 s. Language eng - English Country CZ - Czech Republic Keywords anisotropy ; Earth's crust ; earthquake swarm ; microearthquakes ; stress field ; S-wave splitting ; West Bohemian/Vogtland Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects IAA300120801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA205/06/1780 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z30120515 - GFU-E (2005-2011) UT WOS 000261412600010 Annotation Most S-wave particle motions of local micro-earthquakes in the West Bohemia/Vogtland region display S-wave splitting. The split S waves are usually well defined, being separated in time and polarized in roughly perpendicular directions in the horizontal projection. The pattern of S-wave splitting on a focal sphere is station-dependent, indicating the presence of inhomogeneities in anisotropy. For some stations, the splitting pattern is asymmetric with respect to the vertical axis, indicating the symmetry axes of anisotropy are probably inclined. A complex and station-dependent anisotropy pattern is probably the result of a complicated anisotropic crust characterized by diverse geological structures. The spatial variation of anisotropy probably reflects the presence of a variety of different types of anisotropic rocks in the region. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2009
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