seismicity

The purpose of the work is a comprehensive analysis of the causes, characteristics and consequences of the karst-collapse technogenic earthquake that occurred on September 30, 2017 at 00:46 local time (September 29, 2017 at 21:46 GMT) in the city of Stebnyk in the area of the Mine No. 2 of the Stebnyk MCE “Polymineral”, its analysis in connection with technogenically provoked dangerous geological processes (in particular, with the formation of karst sinkholes) at the Stebnyk potash mine (Ukrainian Precarpathians). Methodology.

Spatial-temporal variations of weak seismicity parameters were analyzed in the region of Talasso-Fergana fault in Tien Shan on the period 1962-1995 years. Heterogeneity of seismic process characteristics was showed in different fault sections. Relatively movable areas were revealed near the fault in the sense of energy migration of weak seismic events. Obtained results were compared with new seismic tomography P velocity models for upper part of lithosphere.

In the paper discusses the features of long-term seismicity (1961-2010) the territory of Transcarpathian depression and separate seismoactive zones (A, B and C).  The relationship of these zones with the main tectonic elements of depression is set. It is proved that the boundary between zones A and B passes through Oash deep fault.

On the basis of carried out specification of coordinates and depths of local earthquakes sources which was made by using of new methods the general spatial analysis of seismicity of the Ukrainian Carpathians and its concrete structural-tectonic zones was made. The distribution of earthquakes on the depth including on the Mizhgirya – Vyshkov – Shevchenko – Dolyna section was studied and some features of seismotectonics in the area around the north-east of connection of Oash and Transcarpathian deep faults was traced.
 

Purpose. Refinement of the estimated seismic hazard area accommodation Zaporizhzhya atomterm elektrostantsii (ZNPP) to check the earthquake resistance of modern Zaporizhzhya and compliance with its prognoznym seismic effects and the requirements of the IAEA. Methods. The use of modern methodologies and techniques of longterm forecast of seismic hazard is based on probabilistic and deterministic characteristics of seismicity, foci and focal zones of strong earthquakes according to both laws and random factors of space-time and energy organizing seismotectonic process.

Earthquake of Olesky area and surrounding areas within the Lviv region and in particular some features of earthquakes in V. Mosty (1875) and Komarno (2007) as well as influence on a given territory from Vrancea zone earthquakes (in particular, the earthquake in 1838) are analyzed. According to foreign reports about the influence of the method of hydraulic fracturing on seismicity the conclusion about possible changes of seismic regime of the area and increase the possible danger to water resources of Lviv region from shale gas extraction were made. 

Purpose. The purpose of researches – to analyze the characteristics of modern geodynamics, tectonics and seismicity of Carpathian region of Ukraine and its components – the Folded Carpathians, Transcarpathians and Precarpathians. Methodology. The methodology includes a detailed complex analysis of the deep structure and seismotectonic activity in the region and its separate zones on the basis of specially developed methods of refinement the coordinates and depth of local earthquakes sources and complex of geological and geophysical data. Results.

In the paper, the results of quantitative analysis of the relationship between seismicity and deep structure of the Earth’s crust are presented. The majority of earthquakes are confined to the areas with higher horizontal gradients of the depth to the base of granite and sedimentary layers. Also, the majority of earthquakes are located in areas with great thickness of granite and minimum thickness of sedimentary layer. 

Purpose. To carry out the investigations in the the East European Platform southwest with a special emphasize made on the Soligorsk region, where the Starobin deposit of potassium salts of the Late-Devonian age is located. The interest of scientists to just this region is explained by the fact that a swarm of crustal earthquake foci is restricted within this deposit area, which is in marked contrast to other seismic events that are few and far between and rather evenly distributed over the other territory of Belarus. Methods.

The aim. The aims of this study were: to calculate the parameters of horizontal deformation of Earth’s crust of Europe on the basis of annual velocity vectors of the horizontal displacement of permanent GNSS - stations, calculated according to the GNSS - observations during 2000 – 2010; to study the distribution and changes of horizontal deformations and earth's crust in Europe changes from 2000 to 2010 and to establish their relationship with the tectonic structure and the manifestation of seismic activity in the actual region. Methods.