аномалії електропровідності

In order to study the deep structure of the southwestern Ukrainian Carpathians, where the Carpathian conductivity anomaly is located, in 2015 and 2020, modern synchronous magnetotelluric studies were carried out on the profiles of Mukachevo-Skole, Seredne-Borynya and Karpatsky at twenty-three points and the spatiotemporal distribution and the electric field on the Earth's surface, which can be used to assess the conductivity and geoelectrical structure of the region, was obtained.

Axial parts of anomalies of conductivity and epicenters of earthquakes of the Australian continent are analyzed. An author draws conclusion about quality connection between the epicenters of earthquakes and regional anomalies of conductivity.

Possible nature of anomalous conductivity of DDD and Donbass is considered. The detailed description of materials concerning the earthquakes of Novodar and Roven is represented. The author makes an assumption that presence of graphite skins and formation of fractured porous massifs in rocks can be one of the possible trigger mechanisms.

Geology-geophysical conditions of Kryvyy Rig earthquakes region are considered in limited by co-ordinates φ=47,45÷48,60 N and λ=32,5÷34,150 E area. Detailed description of materials of earthquake of the 14th of January 2011 is given. Author does supposition that presence there of graphite skins and formation of fractured-porous arrays in rocky breeds can be one of possible trigger mechanisms for local earthquakes.

Carpathian electrical conductivity anomaly (CEA) is traced by construction and analysis of induction vectors from which maximum possible depth (20-25 km) and integral conductance (about 108 Sm×m) were estimated. The true depth is determined by sounding methods: MTS over the axis of CEA was performed in only two areas in which properties of the AEC were different. Electric asthenosphere in Pannonian Basin begins at smaller depth (50-100 km) than on platforms (100-250 km), but results are not accurate, sometimes contradictory.

Purpose. The purpose is review and analysis of the modern publications of the experimental measurements data of geophysical parameters investigations of East European Platform lithosphere and its surroundings. Methodology. The methodology includes a detailed complex analysis of the deep structure and seismotectonic activity in the stable regions. Results. Analysis of anomalies of electric conductivity in tectonically stable regions showed that within the ancient platforms that were previously attributed to aseismic, rarely, the catastrophic earthquakes with high intensity occur.

Ingul megablock and Ingul-Kryvoy-Rog suture zone at the depth range of 20 to 30 km, ρ is up to 100 Ohm∙m), Eastern-Preazovian anomaly (related to Gruzko-Elachinsk and south part of Kalmiuss fault zones at the depth of up to 10 – 50 km, ρ < 100  Ohm∙m), and Korosten, Korsun-Novomirgorod and Eastern-Preasovian massifs of anorthosite and alkaline rocks.

Purpose. The purpose of researches is to build a three-dimensional geoelectric model of the crust and upper mantle and to answer some questions of the deep structure and geodynamics of the North Dobrudga and PeriDobrudga depression. Methodology. The methodology includes a detailed analysis of the deep structure of the region based on the results of 3D modeling of electromagnetic experimental data and to search for the interrelation between conductivity anomalies in the Earth’s crust and upper mantle and foci of seismic events. Results.