THE SEISMICITY OF THE CARPATHIANS IN 2020
In 2020 in the Carpathian region seismic monitoring was held by the stationary seismic stations «Lviv», «Uzhgorod», «Mezhgorye», «Kosov», «Morshyn», «Trosnik», «Nyzhnye Selyshche», «Gorodok», «Chernivtsi», «Berehove», «Breed», «Mukachevo», «Rakhiv»,«Korolevo», «Kamianets-Podilskyi», «Novodnestrovsk», «Skhidnytsya», «Starunya»,«Stuzhytsya», «Holmets», «Lubeshka» and three temporary seismic stations installed in the area of the Stebnitskiy potash plant (PNT3 from October 2017, and PNT4 and РNT5 from August 2019). In all the seismic stations of instrumental observations it was carried out with the use of digital equipment, was established in the Department of seismicity Carpathian region of the Institute of Geophysics of NAS of Ukraine. The entire territory of the Carpathian region is divided into nine seismically active regions. A comprehensive analysis was performed for an area bounded by coordinates: 45° N -21° E ; 50.5° N -21° E , 50.5° N -25° E , 45.5° N -25° E, 49.5° N -30° E , 44° N -30° E, 44° N -25° E , 45° N -25° E. In total in 2020 a network of seismic stations in the Carpathian region recorded 60 earthquakes in the energy level range of К R = 5.5÷11.4. The total energy released was Σ Е = 1.11 · 1013J, which is above than the level of the previous year Σ Е = 9.15 · 1011 J . Increased seismic activity this year was observed in Transcarpathia and in the Vrancea mountains. In the Transcarpathia region, 17 earthquakes with the energy class K R = 4.3 ÷9.4. Their total seismic energy was Σ Е = 3.94 · 109 J . The strongest of them were recorded on April 19 at 05:45 with К R = 9.4 and a depth of h = 4 km .and on April 27 at 22:07 with К R=9.1 and a depth of h = 1.4 km . Both earthquakes occurred in the area of the city of Uzhgorod.In the seismically active area of Vrancea, a network of seismic stations in the Carpathian region of Ukraine recorded 13 earthquakes of the energy class K R=8.9÷ 12.8 were recorded, their total seismic energy was Σ Е = 1.08 · 1013 J . The foci of the Vrancea earthquakes are concentrated at a depth of h = 60-150 km . The greatest activity in the Vrancea region was observed in January, April and June. The regional Carpathian hodograph was used to determine the main parameters of earthquakes in the North-West region, and the Jeffries-Bullen hodograph was used for the outbreaks of the Vrancha zone and and other areas.This year, a decrease in seismic activity is observed on the territory of Bukovina. In total registered here 5 earthquakes with a total energy of Σ Е = 3.13·1010 J. The foci of earthquakes are located in the earth's crust at a depth of 1.3 and 10 km .The article describes the features of seismicity of the Carpathian region in 2020. The catalog of earthquakes, distribution of earthquakes over the regions and energy classes, graphs of the release of seismic energy and the number of earthquakes in the region are presented. Brief characteristics of seismicity in separate seismically active areas of the Carpathian region is given.