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Non–double-couple mechanisms of microearthquakes induced by hydraulic fracturing
- 1.0330651 - GFÚ 2010 RIV US eng J - Journal Article
Šílený, Jan - Hill, D. P. - Eisner, L. - Cornet, F. H.
Non–double-couple mechanisms of microearthquakes induced by hydraulic fracturing.
Journal of Geophysical Research. Roč. 114, B8 (2009), B08307/1-B08307/15. ISSN 0148-0227
R&D Projects: GA AV ČR IAA300120502; GA ČR GA205/09/0724
Grant - others:EC(XE) MTKI-CT-2004-517242
Institutional research plan: CEZ:AV0Z30120515
Keywords : microearthquakes * source mechanisms * hydraulic fracturing
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 3.082, year: 2009
We have inverted polarity and amplitude information of representative microearthquakes to investigate source mechanisms of seismicity induced by hydraulic fracturing in the Carthage Cotton Valley, east Texas, gas field. With vertical arrays of four and eight three-component geophones in two monitoring wells, respectively, we were able to reliably determine source mechanisms of the strongest events with the best signal-to-noise ratio. Our analysis indicates predominantly non–double-couple source mechanisms with positive volumetric component consistent with opening cracks oriented close to expected hydraulic fracture orientation.
Permanent Link: http://hdl.handle.net/11104/0176387
Number of the records: 1