Seismic instruments: article

Vertical and horizontal displacements by observations at Talaya station (South-West part of Baikal rift)
V.Yu. Timofeev 1 A.V. Timofeev 1 D.G. Ardyukov 1 I.S. Sizikov 1,2 D.A. Nosov 1,2
1 Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences 2 Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences
Journal: Seismic instruments
Tome: 59
Number: 4
Year: 2023
Pages: 5-23
UDK: 551.24:528.7
DOI: 10.21455/si2023.4-1
Keywords: Baikal rift, absolute gravimetry, space geodesy, horizontal and vertical displacement velocities, earthquakes
Аnnotation: The rates of modern movements are an important factor in the modern geodynamics of the Baikal rift system, wherein the reflection of strong earthquakes in the experimental values of displacements, is to be discussed, as well as the question of modern vertical movements. According to the measurements of 1992–2022, performed by the absolute gravimetry and space geodesy methods, the velocities of vertical and horizontal movements at the Talaya seismic station (Baikal rift) displacement rate were determined as 1.7–1.9 mm/yr at the ESE relative to the Irkutsk point (Siberian platform). A set of methods was used to obtain the vertical velocity for different epochs, pre-, co- and post-period of Kultuk earthquake (2008, M = 6.3, 25 km to the epicenter). Subsidence rates vary from 1.1 mm/yr to 3.3 mm/yr. Possible signs of the preparation of Baikal earthquakes have been identified.