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Title: INTEGRATION THE NEW VELOCITIES RESULTS FROM MONITORING OF GEODYNAMIC PROCESSES IN THE AREA OF SOFIA IN THE COMMON FIELD OF HORIZONTAL VELOCITIES
INTEGRATION THE NEW VELOCITIES RESULTS FROM MONITORING OF GEODYNAMIC PROCESSES IN THE AREA OF SOFIA IN THE COMMON FIELD OF HORIZONTAL VELOCITIES

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Nikolay Dimitrov
10.5593/sgem2023/2.1/s09.28
10.5593/sgem2023/2.1
1314-2704
978-619-7603-57-6
English
23
2.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Geodesy and Mine Surveying
The monitoring of geodynamic processes with modern GNSS technology in the area of Sofia and Southwest Bulgaria has been going on for more than 25 years. To investigate modern crustal motions in the area, GNSS data obtained between 1996 and 2022 are analyzed to obtain the velocity field for southwestern Bulgaria. Every year, measurements are carried out on a part of the points, and the last measurements were carried out in 2022. For the entire period, monitoring covered 28 stations. To evaluate the new result for the obtained horizontal velocities of points from Sofia geodynamic network, they are combined with the results for the point velocities from EPN densification project and with the results from National GPS Network. Thus, the common field of horizontal velocities in the region can be determined. The three networks have reliable solutions for point coordinates and velocities. The combination of the three networks provides reliably determined velocities of more than 85 points in the relatively small region of southwestern Bulgaria. The high density of the points can be used for geodynamic study of the region. The results of the three networks supplement each other and are a base to evaluate the reliability of obtained velocities. From this point of view, the compliance and reliability are very high. The newly acquired velocities field confirms that the general tendency of movement of the points in the region of Southwest Bulgaria is in the south direction with respect to stable Eurasia, as a general tendency the velocities tend to increase from North to South. This pattern is in agreement with the extensive movement of southern Bulgaria and northern Greece. The obtained velocities field can be used for further detailed geodynamic and geological investigations of the fault structures in the region.
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This paper has been made available with the financial support provided by National Science Fund, call identifier “Competition for financial support of basic research projects – 2019” Project "Monitoring of geodynamic processes in the area of Sofia". Contract No КП-06-H 34/1. Present work is supported by Contract No D01- 164/28.07.2022 (Project "National Geoinformation Center (NGIC)" financed by the National Roadmap for Scientific Infrastructure 2020-2027 of Bulgaria.
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https://doi.org/10.5593/sgem2023/2.1/s09.28
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
223-228
03 - 09 July, 2023
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GNSS, crustal movements, geodynamics, velocity field