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Focal Mechanisms of West Bohemia, Central Europe, Earthquakes-End of May 2014: Evidence of Volume Changes
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SYSNO ASEP 0548760 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Focal Mechanisms of West Bohemia, Central Europe, Earthquakes-End of May 2014: Evidence of Volume Changes Author(s) Křížová, Dana (USMH-B) SAI, ORCID
Málek, Jiří (USMH-B) RID, ORCID, SAINumber of authors 2 Source Title Seismological Research Letters. - : Seismological Society of America - ISSN 0895-0695
Roč. 92, č. 6 (2021), s. 3398-3415Number of pages 18 s. Language eng - English Country US - United States Keywords swarms ; fluids ; inversion Subject RIV DC - Siesmology, Volcanology, Earth Structure OECD category Volcanology R&D Projects GA18-05053S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support USMH-B - RVO:67985891 UT WOS 000714685600005 EID SCOPUS 85119263758 DOI 10.1785/0220200389 Annotation West Bohemia is a region with a lot of mineral springs and gas outflows, which seems to be related to the remains of Quaternary volcanism in Central Europe. Earthquake swarms in shallow depths (less than 15 km) are very frequent there. We focused on the strongest earthquake over the past 30 yr (31 May, 2014 M-w similar to 3.8) and on two smaller ones (M-w similar to 2.9 and 2.5) from the same day. Seismograms from local and regional seismic stations were used to calculate the full and deviatoric moment tensors using low-frequency full-waveform inversion. The studied events have similar source mechanisms. The aforementioned earthquake sequence was selected to observe the isotropic part (negative value = implosion) of full moment tensors. It could relate to the motion and phase transition of fluids, especially water, and CO2. The main goal of this study is to contribute to clarification of the nature of earthquake swarms in the western edge of the Bohemian Massif. Negative value of the isotropic part of full moment tensor could be related to the closing of cracks and fissures during a rupture process. Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2022 Electronic address https://pubs.geoscienceworld.org/ssa/srl/article-abstract/92/6/3398/606051/Focal-Mechanisms-of-West-Bohemia-Central-Europe?redirectedFrom=fulltext
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