Record details

Title
    Seismic network calibration for retrieving accurate moment tensors
Author
    Davi, Rosalia
    Vavryčuk, Václav
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Bulletin of the Seismological Society of America
Vol./nr.
    Roč. 102, č. 6
Pages
    s. 2491-2506
Year
    2012
Notes
    Projekt: GAP210/12/1491, GA ČR, CZ3cav_un_auth*0285048
    Projekt: IAA300120801, GA AV ČR3cav_un_auth*0241180
    Projekt: LM2010008, GA MŠk3cav_un_auth*0273783
    Rozsah: 16 s. : P
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    earthquake source parameters
    inversion
    West Bohemia swarm
Keyword
    Accurate
    Calibration
    Moment
    Network
    Retrieving
    Seismic
    Tensors
Abstract (in english)
   We present a method for calibrating seismic networks in order to retrieve highly accurate seismic moment tensors. The method is based on a joint inversion of large datasets of earthquakes for moment tensors and for amplifications of the network stations, which encompass the instrumental amplifications of sensors and the gain factor of the acquisition system, as well as the local site effects neglected in modeling of Green's functions. The method is capable of detecting the reverse polarity of sensors, incorrect orientation of sensors, or anomalous site effects caused by local geological conditions at individual stations. The robustness and accuracy of the method are tested on synthetic data with different noise levels, station configurations, and a variety of focal mechanisms. The numerical modeling confirms that the inversion code works well and yields robust results.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013