Abstract
Since the 1970-ties, large azimuth changes in the equilibrium of quartz horizontal pendulums have been irregularly registered in the Geodynamic Laboratory in Książ. However, azimuth changes of the pendulums did not correlate with meteorological phenomena and the compensation phases of these changes excluded processes of gravitational creep of the rock massif. It was assumed that changes of these azimuths result from tectonic tilt of the rock massif. These were the first observations of contemporary tectonic activity in the Świebodzice Depression (SW Poland). Multiannual observations have allowed for determining temporal and amplitude characteristics of such tectonic activity. Intervals of tectonic activity last from several days to two weeks and are separated by periods of low activity or even no activity. During tectonic events, amplitudes of rock massif deformation reach values of several tens of tidal amplitudes. The distinguished characteristics of tectonic effects and their incidental character have been confirmed by water-tube tiltmeters (WT) activated in the Geodynamic Laboratory in the early 2000s. Unique conditions of the rock massif cause that the WTs, in connection with blocks of the rock massif separated by faults, are natural detectors of tectonic activity, allowing to determine the function of tectonic activity and its derivatives in the surrounding areas.
Highlights
In 2016 2018 the principal research topic in the Geodynamic Laboratory in Książ (GL) included studies on the changes of kinematic activity in the Świebodzice Depression rock massif in the context of their correlation with intervals of seismic activity in mining areas [1]
Phases of tectonic activity in the Świebodzice Depression rock massif last from several to over ten days, as evidenced by observations made by the GL instruments indicating rock massif tilt and vertical movements [2-7]
The measurement systems of water-tube tiltmeters, the main measurement instruments linked with the rock massif, supply information on the kinematic activity of the massif with nanometre precision
Summary
In 2016 2018 the principal research topic in the Geodynamic Laboratory in Książ (GL) included studies on the changes of kinematic activity in the Świebodzice Depression rock massif (the Sudetes, SW Poland) in the context of their correlation with intervals of seismic activity in mining areas [1]. The first comparative studies between functions of tectonic activity (TAF) and seismic activity of mining areas in the Fore-Sudetic Monocline, Upper Silesian Basin and Bohemian Massif began in 2016. Discovery of coincidence between seismic phenomena and tectonic activity confirms the hypothesis on the existence of a large scale and generally uniform tectonic force field covering the mentioned geological units
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
