Satellite geodynamic monitoring in Karelia and adjacent regions
A review of satellite navigation systems (GNSS) and their application in geodynamic studies is made. The results of studying geodynamic processes using GNSS performed by the staff of the IFZ RAS in the north-western region of Russia, including Karelia, in particular at the geodetic point BOTS in the...
| Published in: | HORTUS BOTANICUS |
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| Main Authors: | , , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | Russian |
| Published: |
Petrozavodsk State University
2021
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| Subjects: | |
| Online Access: | https://doi.org/10.15393/j4.art.2021.8125 https://doaj.org/article/850b4aa9939c4aa59467923d895e1252 |
| Summary: | A review of satellite navigation systems (GNSS) and their application in geodynamic studies is made. The results of studying geodynamic processes using GNSS performed by the staff of the IFZ RAS in the north-western region of Russia, including Karelia, in particular at the geodetic point BOTS in the Botanical Garden of Petrozavodsk State University, are analyzed. The results of calculating the velocities of horizontal and vertical movements, areal deformations, as well as their comparison with the seismicity of the region, are presented. Satellite geodetic points for observations of deformation processes in the region began in the 90s of the 20th century. The BOTS point was founded in 1999 as part of Karelian test-site. It is located on a rocky outcrop of bedrock, which excludes its landslide displacement with the upper layers of the soil. It is a concrete monument with a forced centering system. The duration of repeated continuous satellite measurements at the point is 5–7 days, which is a guarantee of the high quality of the measurements. The vertical and horizontal velocities of the earth's surface of the region reveal the postglacial uplift of the Baltic Shield at a rate up to 10.4 mm/year, not exceeding 5–6 mm/year for the Russian territory. Horizontal movements of the East-European tectonic plate have a NE direction and average 23 mm/year. Intraregional horizontal displacement velocities in Karelia and Leningrad region in the local reference system are mainly in SE direction and are about 3–4 mm/year, for the BOTS — 3.8 mm/year. In addition the velocities of points, much attention is paid to the study of areal deformations and the modern seismic regime. The method of analyzing the deformation of the Earth's crust revealed the presence of alternating zones of stretching and compression with deformations (–0.8)×10 -8 – 1.6×10 -8 /year. The territory has weak seismic activity. Since 2000, about 200 seismic events with magnitudes (Ms) 0.7–4.1 have occurred within the territory under consideration. A large ... |
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