Record details

Title
    Finite seismic source parameters inferred from stopping phases for selected events of West Bohemia 2000 swarm
Author
    Kolář, Petr
    Růžek, Bohuslav
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Acta geodynamica et geomaterialia
Vol./nr.
    Roč. 9, č. 4
Pages
    s. 435-447
Year
    2012
Notes
    Projekt: GAP210/10/1728, GA ČR3cav_un_auth*0263509
    Projekt: IAA300120805, GA AV ČR, CZ3cav_un_auth*0239719
    Rozsah: 13 s. : P
Subject category
    finite seismic source
    stopping phases
    West Bohemia earthquke swarm
Keyword
    2000
    Bohemia
    Events
    Finite
    Inferred
    Parameters
    Phases
    Seismic
    Selected
    Source
    Stopping
    Swarm
    West
Abstract (in english)
   Parameters of finite seismic source model were determined for a set of 36 selected events of the West Bohemia 2000 earthquakes swarm (Ml from 1.7 to 3.0) using stopping phases method. Two stopping phases are generated along the source border where the rupture process terminates and these phases form Hilbert transform pair, which is also the criterion for their identification. Circular and elliptical source models were considered and corresponding source parameters were calculated by inverting interpreted stopping phases delays. As generalization of circular to elliptical model was found to be statistically insignificant, only results related to the circular source including error estimates are presented. Our results are in a good agreement with previously published theoretical formula concerning source radius and magnitude and also fairly well confirm general theoretical assumption about constant stress drop.
   The determined stress drop ranges between 1 - 10 MPa with the typical value of 2.4 MPa.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013