Monitoring of Geomagnetic and Telluric Field Disturbances in the Russian Arctic

Abstract

The influence of space factors on technological systems in the Arctic (power transmission lines, oil/gas pipelines) has become critically important. To examine in depth these effects, an archive of digital 1 min data from Soviet/Russian magnetic stations deployed along the Arctic coast was created, starting from 1983 to the present. All data from various sources were converted to daily files in standard IAGA-2002 format and supplemented with quick-look magnetograms. Some of these data are included already in the existing world magnetic field databases, but not all. Examples of disturbances known to excite intense geomagnetically induced currents in power transmission lines were presented: irregular Pi3 pulsations and magnetic perturbation events. The database was augmented with the global 3D model of the Earth’s conductivity structure. The given example showed how the combined usage of the geomagnetic field database and the conductivity model enables one to synthesize the geoelectric field response to geomagnetic variations, and to assess the distortions of the pipeline-soil potential. To determine regions most susceptible to geomagnetic hazard, a map with normalized telluric fields was created for a uniform sinusoidally varying magnetic disturbance. This map showed that the largest electrotelluric potentials and field are induced in regions with a high resistivity (e.g., Kola Peninsula and Ural Mountains). This database can be also a useful support for space missions in the magnetosphere. The database is publicly available on the anonymous FTP site.

A Set of Geophysical Fields for Modeling of the Lithosphere Structure and Dynamics in the Russian Arctic Zone

“…The final factor illustrating the importance of analyzing the geological and geodynamic conditions of the Arctic is seismicity. Today, a large number of studies are being carried out to study seismic hazards, and given the large area, the Arctic region requires constant monitoring of geodynamic conditions [9][10][11]. It is well known that the earthquake distribution is directly related to the structure of the crust and upper mantle; therefore, their parameters should be analyzed together with the direct seismic observations.…”

A Closer Cooperation between Space and Seismology Communities – a Way to Avoid Errors in Hunting for Earthquake Precursors

“…We consider the following specific examples: Magnetic storms as a trigger of EQs; Global ULF waves before strong EQs; Global geomagnetic impulses preceding quakes; Long-period geomagnetic disturbances generated by strong EQs; Discrimination of underground ULF sources by amplitude-phase gradients; Depression of ULF power as a short-term EQ precursor, and Feasibility of ULF precursor detection by satellites. To verify the reliability of the above phenomena, we have used available data from the existing fluxgate and search-coil magnetometer databases: INTERMAGNET [Love and Chulliat, 2013], IMAGE [Tanskanen, 2009], PWING [Shiokawa et al, 2017], and Russian Arctic stations [Kozyreva et al, 2022].…”