Impulsive disturbances of the geomagnetic field as a cause of induced currents of electric power lines

• Published in: Journal of Space Weather and Space Climate
• Main Authors: Belakhovsky Vladimir, Pilipenko Vyacheslav, Engebretson Mark, Sakharov Yaroslav, Selivanov Vasily
• Format: Article in Journal/Newspaper
• Language: English
• Published: EDP Sciences 2019
• Subjects: Geomagnetically indices currents (GICs); impulsive geomagnetic disturbances; Pi3 pulsations; Meteorology. Climatology; QC851-999; Kola Peninsula; kola peninsula
• Online Access: https://doi.org/10.1051/swsc/2019015; https://doaj.org/article/8fe8a90c324843198fa91929f46cc62e

Geomagnetically induced currents (GICs) represent a significant challenge for society on a stable electricity supply. Space weather activates global electromagnetic and plasma processes in the near-Earth environment, however, the highest risk of GICs is related not directly to those processes with enormous energy yield, but too much weaker, but fast, processes. Here we consider several typical examples of such fast processes and their impact on power transmission lines in the Kola Peninsula and in Karelia: interplanetary shocks; traveling convection vortices; impulses embedded in substorms; and irregular Pi3 pulsations. Geomagnetic field variability is examined using data from the IMAGE (International Monitor for Auroral Geomagnetic Effects) magnetometer array. We have confirmed that during the considered impulsive events the ionospheric currents fluctuate in both the East-West and North-South directions, and they do induce GIC in latitudinally extended electric power line. It is important to reveal the fine structure of fast geomagnetic variations during storms and substorms not only for a practical point of view but also for a fundamental scientific view.