Investigation of Dst Variations in X Component at Midlatitudes during Geomagnetic Storm on February 3, 2022
Keywords:Dst index, Earth magnetic field, equatorial ring current
The main idea of this study is to investigate the Dst variations in the X component of the Earth’s magnetic field and their latitudinal distribution in the conditions of geomagnetic disturbance on February 3, 2022. For this purpose, data from the world database of geomagnetic observatories INTERMAGNET were used. Three sectors of geomagnetic observatories were selected: (i) Eastern Europe, (ii) Western Europe, (iii) Eastern Asia. The considered stations are located at different latitudes (GLAT) but are close to each other in longitudes (GLON). For each sector, changes in the X component were considered and Sq variations were previously removed, based on data for five quiet days determined by the Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences. The results allow proposing a methodology for filtering the variations in the X component for the considered geomagnetic observatories resulting from the geomagnetic disturbance. In the concluding part of this work, an analysis of the relationship between variations in the X component and the equatorial ring current represented by Dst is proposed. The obtained linear regression coefficients for each of the sectors show the well-known dependency, expressed in the reduction of the influence of Dst on the changes in the X component as it moves from the equator to higher northern latitudes.
How to Cite
LicenseCopyright (c) 2023 Proceedings of the Bulgarian Academy of Sciences
Copyright (c) 2022 Proceedings of the Bulgarian Academy of Sciences
Copyright is subject to the protection of the Bulgarian Copyright and Associated Rights Act. The copyright holder of all articles on this site is Proceedings of the Bulgarian Academy of Sciences. If you want to reuse any part of the content, please, contact us.