Record details

    Geophysical images of the Western Eger rift earthquake swarm region: structural implications based on regional and high resolution data analysis.
    Havíř, Josef
    Nehybka, Vladimír
    Špaček, Petr
    Švancara, Jan
    Tilšarová, Radka
Publication type
    článek v periodiku
Source title - serial
    Geophysical Research Abstracts
    Roč. 7
Thesaurus term
    aeromagnetic map
    earthquake swarm
    Eger rift
    gravity map
    spectrometric map
    structural implication
Abstract (in english)
   Regional gravity, magnetometric and spectrometric map were compiled for geodynamically active western Eger rift area, which includes part of western Bohemia and Vogtland. On background of these maps we studied the distribution of earthquake epicentres located by KRASNET network between 1991 and 2004, including major 1994, 1997 and 2000 swarms. Of the analysed regional geophysical fields only radiometric and spectrometric maps show spatial correlation of main epicentral lineament Vackovec-Novy Kostel-Pocatky with abundances of radioactive elements. Applying the Linsser filtering method to the gravity data we derived positions of density contacts at depth levels of 2, 4 and 8 km. In the area of main epicentral zone pronounced lineament of Linsser density-contact indications at depth of 8 km has WNW-ESE trend, which suggests that it may correspond to a real fault plane for one of two dominant groups of focal mechanisms, defined as type A for 1997 swarm by Horalek et al. (2000).
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
Import date
    8. 8. 2012