GEOLINKS International Conference 2019, Book 1
RESULTS OF MEASUREMENTS OF ULTRA-SMALL DEFORMATIONS OF THE EARTH’S CRUST AT THE TALAYA OBSERVATORY NEAR BAIKAL LAKE
Alexander Yu. Rybushkin, Yury N. Fomin, Denis O. Tereshkin, Vladimir M. Semibalamut, Vadim A. Zhmud, Sergey V. Panov, Michel D. Parushkin, Vladimir Yu. Timofeev, D. G. Ardyukov, Lubomir V. Dimitrov
The paper discusses the systematic results of observations of deformation processes in the mountain tunnel (gallery) at the Talaya Observatory using a laser meter for ultra-low deformations of the Earth’s crust. The current online and offline processing of incoming data has been completed. The processing of the results of observations and studied the behavior of the deformation process in the Earth's crust has been conducted in a wide frequency range on the eve of earthquakes in order to identify their precursors. A powerful oscillation buildup with periods of 25–60 minutes was found, which was caused by an earthquake with a magnitude of M = 5.2 east of Shikotan Island. The analysis was carried out and the averaged spectra of the main harmonics prevailing in the deformation signal in the range of oscillations with the longest period (ROLP) range were obtained. Harmonics with periods of 205 and 160 minutes are the most evident, which corresponds to the multiplicity to the star day duration. Of particular interest are the 160 minute oscillations, since such oscillations are of a cosmological nature and are found both on the Sun and outside the Solar System.
laser deformograph, short-term precursors of earthquakes, Baikal region, mountain tunnel, modern deformation velocity field