Resolution of non-double-couple mechanisms: simulation of hypocenter mislocation and velocity structure mismodeling

0330652 - GFÚ 2010 RIV US eng J - Journal Article
Šílený, Jan
Resolution of non-double-couple mechanisms: simulation of hypocenter mislocation and velocity structure mismodeling.
Bulletin of the Seismological Society of America. Roč. 99, č. 4 (2009), s. 2265-2272. ISSN 0037-1106. E-ISSN 1943-3573
R&D Projects: GA AV ČR IAA300120502; GA ČR GA205/09/0724
Grant - others:EU(XE) MTKI-CT-2004-517242
Institutional research plan: CEZ:AV0Z30120515
Keywords : earthquake mechanisms * induced seismic events * non-double-couple mechanisms
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 1.860, year: 2009

Mechanisms of earthquakes and induced seismic events are frequently found using the moment tensor description rather than the traditional double couple (DC), as it allows for nonshear source phenomena. However, non-DC source components are sensitive to event mislocations and inexact velocity models of the crust. Inaccuracies such as these can generate spurious non-DC components in the mechanism, which should be taken into account during the interpretation. We perform a synthetic case study simulating seismic observations at Soultz-sous-Forêts, Alsace, hot dry rock (HDR) site. Synthetic P and S amplitudes for several shear-tensile source models are inverted, assuming hypocenter mislocation and velocity structure mismodeling in several types of station coverage.
Permanent Link: http://hdl.handle.net/11104/0176388