Record details

Title
    Source mechanisms in the intense seismicity induced by fluids injection at the Soultz HDR site, Alsace, in 2003
Author
    Dorbath, L.
    Horálek, Josef
    Jechumtálová, Zuzana
    Šílený, Jan
Conference
    EAGE Conference & exhibition incorporationg SPE EUROPEC 2010 (72. : 14.06.2010-17.06.2010 : Barcelona, Španělsko)
Language
    anglicky
Publication type
    konferenční příspěvek (zahraniční konference)
Source title - monograph
    Barcelona '10. Conference Proceedings & Exhibitors' Catalogue
Pages
    S. 1679-1683
Notes
    Projekt: GAP210/10/1728, GA ČR3cav_un_auth*0263509
    Projekt: IAA300120911, GA AV ČR3cav_un_auth*0252829
    Rozsah: 5 s. : CD-ROM
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    moment tensor
    Soultz-sous-Forets site
    source mechanisms
Keyword
    2003
    Alsace
    Fluids
    HDR
    Induced
    Injection
    Intense
    Mechanisms
    Seismicity
    Site
    Soultz
    Source
Abstract (in english)
   We have inverted the peak amplitudes of direct P waves of 45 micro earthquakes with magnitudes of between M=1,4 and 2,9 which occurred during the 2003 massive fluid injection in the borehole of the Soultz site. The full moment tensor expression of the mechanism was applied. Surprisingly, the mechanisms of all are dominantly pure shears. The T-axes are fairly stable, being concentrated subhorizontally roughly in the EW direction. On the contrary, the P-axes are all-constrained varying in the NS direction from nearly vertical to nearly horizontal, which points to heterogeneous stress in the Soultz injected volume. This is in agreement with the stress pattern from in-situ measurements.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013