Number of the records: 1  

Aftershocks triggered by fluid intrusion: Evidence for the aftershock sequence occurred 2014 in West Bohemia/Vogtland

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    SYSNO ASEP0463859
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleAftershocks triggered by fluid intrusion: Evidence for the aftershock sequence occurred 2014 in West Bohemia/Vogtland
    Author(s) Hainzl, S. (DE)
    Fischer, Tomáš (GFU-E) ORCID, RID
    Čermáková, Hana (GFU-E) RID
    Bachura, M. (CZ)
    Vlček, J. (CZ)
    Source TitleJournal of Geophysical Research-Solid Earth. - : Wiley - ISSN 2169-9313
    Roč. 121, č. 4 (2016), s. 2575-2590
    Number of pages16 s.
    Publication formPrint - P
    Languageeng - English
    CountryUS - United States
    Keywordspore-pressure diffusion ; 2000 earthquake swarm ; Vogtland/Western Bohemia
    Subject RIVDC - Siesmology, Volcanology, Earth Structure
    R&D ProjectsGAP210/12/2336 GA ČR - Czech Science Foundation (CSF)
    LM2010008 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
    Institutional supportGFU-E - RVO:67985530
    UT WOS000381626700020
    EID SCOPUS84963647496
    DOI10.1002/2015JB012582
    AnnotationThe West Bohemia/Vogtland region, central Europe, is well known for its repeating swarm activity. However, the latest activity in 2014, although spatially overlapping with previous swarm activity, consisted of three classical aftershock sequences triggered by M(L)3.5, 4.4, and 3.5 events. To decode the apparent system change from swarm-type to mainshock-aftershock characteristics, we have analyzed the details of the major M(L)4.4 sequence based on focal mechanisms and relocated earthquake data. Our analysis shows that the mainshock occurred with rotated mechanism in a step over region of the fault plane, unfavorably oriented to the regional stress field. Most of its intense aftershock activity occurred in-plane with classical characteristics such as (i) the maximum magnitude of the aftershocks is significantly less than the mainshock magnitude and (ii) the decay can be well fitted by the Omori-Utsu law. However, the absolute number of aftershocks and the fitted Omori-Utsu c and p parameters are much larger than for typical sequences. By means of the epidemic-type aftershock sequence model, we show that an additional aseismic source with an exponentially decaying strength triggered a large fraction of the aftershocks.
    WorkplaceGeophysical Institute
    ContactHana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028
    Year of Publishing2017
Number of the records: 1  

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