VARIATIONS OF THE GEOMAGNETIC FIELD IN BOREHOLES

Abstract

The results of monitoring of the measurements of the geomagnetic field in boreholes carried out for the first time are presented in this article. Variations (perturbations) of the geomagnetic field caused mainly by auroras were recorded in the satellite borehole of the Kola superdeep borehole SG-3. The amplitude–frequency analysis was performed, and the measurements were compared with the ground-based measurements. Similar measurements were carried out in the Ural superdeep borehole SG-4. The recorded variations are related mainly to the class of S q variations. The performed amplitude–frequency analysis of variations measured at the surface and in the borehole allowed us to determine the depth of internal sources of high- and low-frequency components of Sq variations.