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Source mechanisms in the intense seismicity induced by fluids injection at the Soultz HDR site, Alsace, in 2003

SYSNO ASEP	0351656
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Source mechanisms in the intense seismicity induced by fluids injection at the Soultz HDR site, Alsace, in 2003
Author(s)	Horálek, Josef (GFU-E)_{ORCID, RID} Jechumtálová, Zuzana (GFU-E)_{ORCID, RID} Dorbath, L. (FR) Šílený, Jan (GFU-E)_{ORCID, RID}
Source Title	Barcelona '10. Conference Proceedings & Exhibitors' Catalogue. - Houten : EAGE, 2010 - ISBN 978-90-73781-86-3
Pages	s. 1679-1683
Number of pages	5 s.
Publication form	CD-ROM - CD-ROM
Action	EAGE Conference & exhibition incorporationg SPE EUROPEC 2010 /72./
Event date	14.06.2010-17.06.2010
VEvent location	Barcelona
Country	ES - Spain
Event type	WRD
Language	eng - English
Country	NL - Netherlands
Keywords	source mechanisms ; moment tensor ; Soultz-sous-Forets site
Subject RIV	DC - Siesmology, Volcanology, Earth Structure
R&D Projects	IAA300120911 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GAP210/10/1728 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z30120515 - GFU-E (2005-2011)
Annotation	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.
Workplace	Geophysical Institute
Contact	Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028
Year of Publishing	2011

Number of the records: 1