Title: SEISMOLOGICAL ANALYSIS OF THE SWARM TYPE SEISMICITY IN THE REGION OF VELINGRAD, BULGARIA
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Title: SEISMOLOGICAL ANALYSIS OF THE SWARM TYPE SEISMICITY IN THE REGION OF VELINGRAD, BULGARIA

SEISMOLOGICAL ANALYSIS OF THE SWARM TYPE SEISMICITY IN THE REGION OF VELINGRAD, BULGARIA
Stela Simeonova; Plamena Raykova; Dimcho Solakov
10.5593/sgem2022/1.1/s05.065
10.5593/sgem2022/1.1
1314-2704
978-619-7603-38-5
English
22
1.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Applied and Environmental Geophysics
Тhe space-time distribution of earthquakes is of substantial importance for understanding the physics of the earthquake generation process. Earthquakes can be analyzed as a time series of events that result from the released strain in the earth's crust. The study of the space-time distribution of earthquakes using statistical methods reveals many of their characteristics. Sequences of seismic events affect both spatial and time distribution of earthquakes. It is necessary to know the statistical characteristics of the different seismic clusters and to reflect their impact in the general research related to seismicity. In the study, we analyze the swarm type sequence located in the vicinity of the town of Velingrad. The region is characterized with moderate seismic activity. Moreover, a reduced number of small earthquakes have also been registered in the recent past. About 30 events with magnitude in the range of 1.2?M?3.0 are recorded at Bulgarian seismological network in a time period of 10 days. The events are localized on and close to a defined fault structure. Most of the swarm events are with a magnitude in the range of 2.0-2.5. The earthquakes are located in the Earth’s crust at a depth up to 15 km. Rapid transition to background seismicity is observed after the generation of the strongest earthquakes in of the sequence.
seismicity, sequences, swarm, town of Velingrad
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This work has been carried out in the framework of the National Science Program "Environmental Protection and Reduction of Risks of Adverse Events and Natural Disasters", approved by the Resolution of the Council of Ministers № 577/17.08.2018 and supported by the Ministry of Education and Science (MES) of Bulgaria (Agreement № Д01-363/17.12.2020).
conference
Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish 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; Turkish Acad Sci.
559-566
04 - 10 July, 2022
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