Pihulevskyi P.H., Svistun V.К., Anisimova L.B. The consequences of the catastrophic Turkish earthquake on the territory of Kryvbas on February 6th

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Parent Category: Geo-Technical Mechanics, 2023

Category: Geo-Technical Mechanics, 2023, Issue 166

Geoteh. meh. 2023, 166, 125-133

https://doi.org/10.15407/geotm2023.166.125 

 

THE CONSEQUENCES OF THE CATASTROPHIC TURKISH EARTHQUAKE ON THE TERRITORY OF KRYVBAS ON FEBRUARY 6TH

¹Pihulevskyi P.H., ²Svistun V.К., ³Anisimova  L.B.

¹S. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, ²Dnipropetrovsk geophysical expedition "Dniprogeofizika", ³M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

UDC 550.348.334 (477.63)

Language: English

Abstract. The results of the study of the impact of powerful Turkish earthquakes on February 6, 2023: at 01:17:36 (UTC) with a magnitude of 7.8Mw (Kahramanmarash-Gaziantep); at 10:24:50 with a magnitude of 7.5Mw (Ekinozu-Kahramanmarash) for monitoring seismic and hydrophysical observations on the territory of the city of Kryvyi Rih were analyzed. Comprehensive analysis and interpretation of data from hydrogeological and geophysical studies made it possible to assess changes in deep physical processes hundreds of meters from the surface. Analysis of monitoring observations of hydrogeological and geophysical processes occurring on the territory of Kryvbas showed the relationship between the Earth's lithosphere and territories more than 1,300 km away from the centers of powerful earthquakes, which manifested in a short-term decrease in the level of groundwater in the geological environment of Kryvbas. Monitoring observations of the water level in the exploratory well recorded local changes in the geodeformation processes of the earth's crust, which occurred after the powerful Turkish earthquakes on February 6, 2023 at 01:00. 17 min. 36.1 seconds with a magnitude of 7.8 and at 10 a.m. 24 min. 49.6 seconds with a magnitude of 7.5 after 1 hour. 6 (12) min. in the form of a decrease in its level by 2–3 cm. For the first time, the speed of propagation in the upper part of the lithosphere of the deformation front was calculated, which was ≈19.0 km/min. (±0.5 km/min). The recorded decrease in the level of groundwater in the monitoring well allowed us to conclude that after the earthquake, short-term crustal stretching processes took place in the zone of the Kryvyi Ryh-Kremenchuk, which could contribute to the migration of groundwater to greater depths and increase the inflow of water into mines and quarries. Studies have confirmed that fluctuations in the level of underground water in a deep well depend on the processes of modern deformation of the Earth's lithosphere, the manifestation of which is a change in the elastic-deformation state of the earth's crust in the zones of tectonic faults in the territory of Kryvbas. The Kryvyi Rih fault of the coro-mantle foundation forms in the crystalline basement a heterogeneous system of subsequent faults and associated zones of increased permeability for water, influencing the formation and speed of geodynamic processes and determining the hydrodynamics of underground filtration of the Kryvbas territory. The results of the research will allow solving a number of important problems of mining geology: determining the connection of groundwater with the processes of modern deformation of the Earth's lithosphere, the influence of the geological and tectonic structure on the development of the processes of flooding mines and quarries and on residential and industrial buildings. 
Keywords: geodynamic processes, hydrogeodeformation processes, earthquake, monitoring, seismic observations, groundwater.

 

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About the authors:

Pihulevskyi Petro Hnatovych, Doctor of Geological Sciences (D.Sc.), Senior Researcher, Senior Researcher in the Department of Seismic Hazards, S. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine (IGPH of the NAS of Ukraine), Kyiv, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Svistun Volodymyr Kyrolovych, Candidate of Geological Sciences (Ph.D.), Director of the Dnipropetrovsk Geophysical Expedition "Dniprogeofizika", Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Anisimova Larysa Borysivna, Candidate of Biological Sciences (Ph.D.), Head of the Laboratory, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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