ИСТИНА

Using a global volumetric model of lithospheric electrical conductivity, a map of the "geomagnetic hazard" for the Russian Arctic Belt was constructed. The map reveals areas with abnormally large geoelectric responses to the external magnetic field disturbances. These geoelectric fields are capable of being “drivers” of geomagnetically induced currents (GIC) in grounded industrial structures. The "geomagnetic hazard" was also mapped in details for the territory of the Yenisei-Khatanga regional through (YKRT) with a help of unique experimental magnetotelluric sounding array data, collected in the result of the regional stage of the same name oil and gas province studies. This map made it possible to analyze the threats to YKRT industrial facilities which can be caused by GIC during anomalous space weather events. It is shown that the highest amplitude distortions of the telluric field are characteristic of the sides of the through adjacent to the Mountain Taimyr and Norilsk region, as well as the crystalline basement uplift area. The range of the geoelectric field variations was determined and estimates of its extreme values was obtained, which are prerequisites for calculating threshold GIC values in the design of cathodic and other protection systems for oil and gas infrastructure.