Moment tensor catalogue of earthquakes in West Bohemia from 2008 to 2018

0557437 - GFÚ 2023 RIV DE eng J - Journal Article
Vavryčuk, Václav - Adamová, Petra - Doubravová, Jana - Horálek, Josef
Moment tensor catalogue of earthquakes in West Bohemia from 2008 to 2018.
Earth System Science Data. Roč. 14, č. 5 (2022), s. 2179-2194. ISSN 1866-3508. E-ISSN 1866-3516
R&D Projects: GA ČR(CZ) GA19-06422S
Institutional support: RVO:67985530
Keywords : West Bohemia * earthqukes * swarms
OECD category: Volcanology
Impact factor: 11.4, year: 2022
Method of publishing: Open access
https://essd.copernicus.org/articles/14/2179/2022/

We present a unique catalogue of full moment tensors (MTs) of earthquakes with ML between 0.5 and 4.4 that occurred inWest Bohemia, Czech Republic, in the period from 2008 to 2018 (Vavry.cuk et al., 2022a, b). The MTs were calculated from vertical components of P-wave amplitudes. The MT inversion was based on principal component analysis applied to optimally filtered velocity records of local seismic stations deployed in the West Bohemia area. The minimum number of inverted stations is 15, and the rms between theoretical and observed amplitudes is lower than 0.5. The catalogue is exceptional in several aspects: (1) it represents an extraordinary, extensive dataset of more than 5100 MTs, (2) it covers a long period of seismicity in the studied area, during which several prominent earthquake swarms took place, (3) the locations and retrieved MTs of earthquakes are of a high accuracy. Additionally, we provide three-component records at the West Bohemia (WEBNET) seismic stations, the velocity model in the region, and the technical specification of the stations. The dataset is ideal for being utilized by a large community of researchers for various seismological purposes, e.g. for studies of (1) the migration of foci and the spatiotemporal evolution of seismicity, (2) redistribution of stress during periods of intense seismicity, (3) the interaction of faults, (4) the Coulomb stress along the faults and local stress anomalies connected to fault irregularities, (5) diffusivity of fluids along the activated faults, or (6) the time-dependent seismic risk due to the migration of seismicity in the region. In addition, the dataset is optimum for developing and testing new inversions for MTs and for tectonic stress. Since most of the earthquakes are non-shear, the dataset can contribute to studies of non-double-couple components of MTs and their relation to shear-tensile fracturing and/or seismic anisotropy in the focal zone.
Permanent Link: http://hdl.handle.net/11104/0331441