A study of the properties of the tectonic structure of the Kryvyi Rih city based on statistical analysis of seismicity

Authors

  • S. V. Shcherbina Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • P.G. Pigulevskyi Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • I.Yu. Gurova Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • T. A. Amashukeli Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • L.O. Shumlianska Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • O. A. Kalinichenko Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • I. A. Kalitova Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • D.V. Malytsky Carpathian branch of S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
  • V.G. Nikulin Latvian Environment, Geology and Meteorology Centre, Latvia
  • S.T. Verbytsky Department of seismicity of the Carpathian region of the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine

DOI:

https://doi.org/10.24028/gzh.v43i6.251566

Keywords:

induced earthquakes, local earthquakes, industrial explosions, seismicity, focal mechanisms, crustal models

Abstract

The article concerns results of studying two significant seismic events — an explosion (23.09.2020 09:00) and an earthquake (30.09.2020 20:00), which occurred in the area of the city of Kryvyi Rih. There were developed algorithms to process records by the Kryvyi Rih seismic station. There was done a comprehensive interpretation of the seismologic and geological-geophysical data. The seismic events’ coordinates were determined, the quality of seismological data processing was evaluated based on the expert method, the level of trustworthiness of the resulting parameters was estimated. The nature of the eathquake’s origin was analyzed based on the shape and the records’. The structure of the mechanism of the earthquake center shows that this was a natural seismic event of the induced type. The article also provides results of geotectonics study of the region of its origin and shows the connection of the geological structures with the epicenter’s parameters. The parameters of the stress-strain state of the crust in the Kryvyi Rih iron-ore basin are calculated, and the parameters of the epicenter of the induced earthquake (2020.09.30 20:00:40.836, UTC) are established. The experimentally calculated depth of the epicenter of local earthquake coincides with the hypothetical depth of 15 km at the lower edge of faults according to the model of the distribution of the depths of the earthquake hypocenters on the Eastern European platform. The proposed methods and algorithms open new opportunities for modern geophysical research in the long-term seismic hazard assessment of Kryvyi Rih. Meanwhile, for a more precise determination of the place, time and nature of local seismic events in the area it is necessary to develop, here and on adjacent territories, a network of seismic stations capable of recording events of comparable and lesser magnitude.

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Published

2022-02-07

How to Cite

Shcherbina, S. V. ., Pigulevskyi , P., Gurova, . I., Amashukeli, T. A., Shumlianska, L., Kalinichenko, O. A., Kalitova , I. A., Malytsky , D., Nikulin, V., & Verbytsky, S. (2022). A study of the properties of the tectonic structure of the Kryvyi Rih city based on statistical analysis of seismicity. Geofizicheskiy Zhurnal, 43(6), 248–265. https://doi.org/10.24028/gzh.v43i6.251566

Issue

Vol. 43 No. 6 (2021)

Section

Articles

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