Počet záznamů: 1  

Mid-European seismic attenuation anomaly

  1. 1.
    SYSNO ASEP0481967
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevMid-European seismic attenuation anomaly
    Tvůrce(i) Málek, Jiří (USMH-B) RID
    Brokešová, J. (CZ)
    Vackář, Jiří (USMH-B)
    Zdroj.dok.Tectonophysics. - : Elsevier - ISSN 0040-1951
    Roč. 712, AUG 21 (2017), s. 557-577
    Poč.str.21 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.NL - Nizozemsko
    Klíč. slovaseismic wave attenuation ; peak ground motion ; H/V ratio
    Vědní obor RIVDC - Seismologie, vulkanologie a struktura Země
    Obor OECDGeology
    Institucionální podporaUSMH-B - RVO:67985891
    UT WOS000409284500041
    EID SCOPUS85021725697
    DOI10.1016/j.tecto.2017.06.003
    AnotaceMacroseismic studies of various historical earthquakes with epicenters in the Eastern Alps region have shown a significant elongation of isoseismals in the North-West direction. Such an anomalous attenuation of seismic waves in Central Europe is investigated on the basis of instrumental records of two moderate size earthquakes in the Vienna Basin, which occurred in September and October 2013. It has been found that for both earthquakes the peak amplitudes of both velocity and acceleration are considerably higher to the North-West of the epicenters compared to the other directions. The peak ground velocity amplitudes at comparable epicentral distances but different azimuths may vary by as much as one order of magnitude. The inspection of individual seismograms suggests that the phenomenon is associated mainly with the propagation of S waves. Significant differences in frequency content of the seismic waves radiated to different azimuths are also demonstrated. The maximum predominant frequency was not observed at stations closest to the epicenters but about 250 km away, in the Bohemian Massif. The possible causes of these observations are briefly discussed on the basis of an elementary data analysis but further research and in-depth analysis is required to elucidate the causes of these phenomena.
    PracovištěÚstav struktury a mechaniky hornin
    KontaktMagdalena Nováková, lib@irsm.cas.cz, Tel.: 266 009 215
    Rok sběru2018