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Title: ASSESSMENT OF THE HISTORICAL AND RECENT SEISMICITY OF THE BLACK SEA REGION
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ASSESSMENT OF THE HISTORICAL AND RECENT SEISMICITY OF THE BLACK SEA REGION
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1314-2704
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English
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21
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1.1
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• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA |
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The study of seismicity in the Black Sea region is of particular interest for assessing the vulnerability of the surrounding coastal zones to strong earthquakes and their consequences. The seismicity pattern in the area is determined by the geodynamic processes along the boundaries of the Eurasian, Anatolian and Arabian tectonic plates. The paper presents an approach to assessing the seismic activity of the Black Sea and the surrounding region covering historical and recent seismicity. The historical events since after Christ are included in the catalogue compiled in our previous study, which contains 6468 de-clustered events from 1905 to 2021 with a magnitude M?3. All catalogue data are processed by ZMAP, which is routinely applied in the seismological practice to evaluate catalogue quality and in routine network operations. Based on the Frequency-Magnitude Distribution of the overall catalogue, we compiled the magnitude of completeness Mc, b-value and probability maps with their error evaluations for the two periods: recent seismicity (1977-2021) and including historical events, respectively. The catalogue data show a significant increase in small to moderate (3.0?M<5.0) earthquakes after 1980. The considerable increase in the number of seismic stations installed in the countries bordering the Black Sea increases the sensitivity to earthquake detection capability. The seismic events are clustered to the strongest (M?6) earthquakes and outlined the main seismic zones: Shabla-Kaliakra, the Crimean peninsula, three clusters located on the eastern shores of the Black Sea, and one on the southern coast near Bartin, Turkey. These seismic zones outline tectonic units, with specific seismicity patterns in the locations of the clusters.
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conference
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21st International Multidisciplinary Scientific GeoConference SGEM 2021
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21st International Multidisciplinary Scientific GeoConference SGEM 2021, 16 - 22 August, 2021
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Proceedings Paper
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STEF92 Technology
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SGEM International Multidisciplinary Scientific GeoConference
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
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419-426
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16 - 22 August, 2021
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website
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cdrom
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7807
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seismic catalogue; ZMAP; frequency-magnitude distribution; Black Sea
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