0380267 - ÚSMH 2013 RIV CZ eng J - Journal Article
Kolínský, Petr - Valenta, Jan - Gaždová, Renata
Seismicity, groundwater level variations and Earth tides in the Hronov-Poříčí Fault Zone, Czech Republic.
Acta geodynamica et geomaterialia. Roč. 9, č. 2 (2012), s. 191-209. ISSN 1214-9705. E-ISSN 2336-4351
R&D Projects: GA ČR GA205/09/1244
Institutional research plan: CEZ:AV0Z30460519
Keywords : Eastern Bohemian Massif * groundwater level * seismicity
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 0.530, year: 2011
http://www.irsm.cas.cz/materialy/acta_content/2012_02/9_Kolinsky.pdf

Newly developed software for automatic seismic events detection is introduced. Twelve major local earthquakes are detected, localized and their magnitudes are estimated. Simultaneously, groundwater levels are continuously monitored in three wells in the area. Multiple-filtering method is modified and used for the frequency-time analysis of the water level data. Dominant tidal influence on the groundwater level variations is shown. Theoretical tidal potential for all three well locations is computed. Groundwater data and tidal potential are bandpass filtered to focus on the semidiurnal periods. Mutual amplitude ratio and phase shift between both quantities are computed. Each of the three wells exhibits different pattern of the groundwater level variations with respect to tides. A distinct change in the phase shift is observed at the VS-3 well in the second half of 2009. In the same time span, increased seismic activity is also observed.
Permanent Link: http://hdl.handle.net/11104/0211015