Focal mechanisms of micro-earthquakes in the Dobrá Voda seismoactive area in the Malé Karpaty Mts. (Little Carpathians), Slovakia

0348405 - GFÚ 2011 RIV NL eng J - Článek v odborném periodiku
Fojtíková, L. - Vavryčuk, Václav - Cipciar, A. - Madarás, J.
Focal mechanisms of micro-earthquakes in the Dobrá Voda seismoactive area in the Malé Karpaty Mts. (Little Carpathians), Slovakia.
Tectonophysics. Roč. 492, č 1-4 (2010), s. 213-229. ISSN 0040-1951. E-ISSN 1879-3266
Grant CEP: GA AV ČR IAA300120801
Výzkumný záměr: CEZ:AV0Z30120515
Klíčová slova: earthquake * focal mechanism * moment tensor * tectonic stress
Kód oboru RIV: DC - Seismologie, vulkanologie a struktura Země
Impakt faktor: 2.509, rok: 2010

We have analyzed 44 micro-earthquakes with magnitudes between 1.2 and 3.4, which occurred in the Dobrá Voda area, Slovakia, in the period 2001–2009. The epicentres of the micro-earthquakes form a cluster elongated in the ENE–WSW direction. This direction coincides with the orientation of the main fault systems in the area: Dobrá Voda and Brezová faults. The depths of the hypocentres vary from 1 km to 14 km. Three different methods were used to calculate the focal mechanisms: (a) a method using the polarities of Pg and Pn waves, (b) the P-wave amplitude inversion of moment tensors, and (c) the waveform inversion of moment tensors. The majority of the analyzed micro-earthquakes have a left-lateral strike-slip focal mechanism with weak normal or reverse components.
Trvalý link: http://hdl.handle.net/11104/0188952