SEISMICITY ON THE TERRITORY OF BULGARIA AND THE ADJACENT LANDS RECORDED BY NOTSSI IN 2021

Maria Popova, Emil Oynakov, Yordan Milkov, Valentin Buchakchiev, Dragomir Dragomirov

Abstract:
Spatial and temporal distribution of the seismicity observed on the Bulgarian territory in 2021 is presented. The list includes 258 earthquakes with magnitude M >2.5, observed in Bulgaria and the surrounding area within latitude 41o – 44.5о N and longitude λ = 22о -29о E which are registered by the National Operating Telemetry System for Seismological Information (NOTSSI). 2021 is characterized by weak seismicity – dominated by events of magnitude less than 3.0. Only four earthquakes had magnitudes larger than 3.5, the strongest of which happened on the 25.11.2021 with Mw=3.7. As observed in the previous years, the highest activity is reported in the southwestern part of the territory of Bulgaria.

Keywords:
Bulgaria, earthquake, seismicity

Bulgarian Geophysical Journal, 2021, Vol. 44, DOI: 10.34975/bgj-2021.44.10

Author information:
Author: Maria Popova
E-mail: m.popova022@gmail.com
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Author: Emil Oynakov
E-mail:
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Author: Yordan Milkov
E-mail:
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Author: Valentin Buchakchiev
E-mail:
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Author: Dragomir Dragomirov
E-mail:
Affiliation: National Institute of Geophysics, Geodesy and Geography – BAS, str. Acad. G. Bonchev, bl. 3, Sofia 1113, Bulgaria

Acknowledgements:
The authors express their gratitude to E. Botev, Bl. Babachkova, T. Iliev, R. Valkov, P. Kirilov who worked at NOTSSI in 2021.

How to cite:
Popova, M., Oynakov, E., Milkov, Y., Buchakchiev, V., & Dragomirov, D. (2022). Сеизмичност на територията на България и прилежащите земи по данни на НОТССИ за 2021. Bulgarian Geophysical Journal, Vol. 44, p. 117-125. https://doi.org/10.34975/BGJ-2021.44.10