Record details

    Injection 2003 in HDR site Soultz-sous-Forets: microearthquake mechanisms and stress pattern
    Dorbath, L.
    Horálek, Josef
    Jechumtálová, Zuzana
    Šílený, Jan
    Passive seismic workshop Actively Passive! (3. : 27.03.2011-30.03.2011 : Athens, Řecko)
Publication type
    konferenční příspěvek (zahraniční konference)
Source title - monograph
    Third passive seismic workshop Actively Passive! Workshop proceedings
    S. 1-5
    Projekt: GAP210/10/1728, GA ČR3cav_un_auth*0263509
    Projekt: IAA300120911, GA AV ČR3cav_un_auth*0252829
    Rozsah: 5 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    Angelier method
    moment tensor
    tectonic stress evaluation
    temporal and space variations
Abstract (in english)
   Stress evaluation is an immediate benefit of determination of fault-plane solution of events that occur on pre-existing faults within a zone of interest. We have retrieved the moment tensors of 45 microearthquakes with magnitudes between M=1.4 and 2.9 which occurred during the 2003 massive fluid injection in the borehole of the Soultz HDR-site. Surprisingly, the mechanisms were predominantly pure shear slips, i.e. with source mechanisms typical for tectonic earthquakes. To estimate the stress state within the zone of the hypocentra, we applied the approach of Angelier (2002), minimizing the slip shear stress component, advantageously avoiding a prior discrimination between fault and auxiliary plane.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    9. 12. 2013