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High-resolution fault image from accurate locations and focal mechanisms of the 2008 swarm earthquakes in West Bohemia, Czech Republic
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SYSNO ASEP 0394895 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High-resolution fault image from accurate locations and focal mechanisms of the 2008 swarm earthquakes in West Bohemia, Czech Republic Author(s) Vavryčuk, Václav (GFU-E) ORCID, RID
Bouchaala, Fateh (GFU-E)
Fischer, Tomáš (GFU-E) ORCID, RIDSource Title Tectonophysics. - : Elsevier - ISSN 0040-1951
Roč. 590, April (2013), s. 189-195Number of pages 7 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords earthquake location ; failure criterion ; fault friction ; focal mechanism ; tectonic stress Subject RIV DC - Siesmology, Volcanology, Earth Structure R&D Projects GAP210/12/1491 GA ČR - Czech Science Foundation (CSF) LM2010008 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support GFU-E - RVO:67985530 UT WOS 000317538400014 DOI 10.1016/j.tecto.2013.01.025 Annotation We have analyzed 463 micro-earthquakes in the magnitude range from 0.5 to 3.8 that occurred during the 2008 earthquake swarm in West Bohemia, Czech Republic, in order to screen the detailed structure of the focal zone situated at depths between 7 and 11 km. The double-difference location method was applied to records of 22 local seismic stations with an epicentral distance of less than 25 km in order to retrieve highly accurate locations of hypocenters with an accuracy of less than 20 m. The hypocenters are well-clustered and distinctly map the system of activated faults. The fault system has a complex geometry being composed of several fault segments with different orientations. Some of the segments intersect each other. The orientations of the segments coincide well with the focal mechanisms. We have introduced and evaluated the so-called fault instability of the individual fault segments. Workplace Geophysical Institute Contact Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Year of Publishing 2014
Number of the records: 1