Growth of geomagnetic-induced currents during coronal mass ejection and corotating solar wind streams of geomagnetic storms in 2021

V. B. Belakhovsky; Белаховский В. Б.; V. A. Pilipenko; Пилипенко В. А.; Ya. A. Sakharov; Сахаров Я. А.; V. N. Selivanov; Селиванов В. Н.

doi:10.31857/S0367676522700478

Growth of geomagnetic-induced currents during coronal mass ejection and corotating solar wind streams of geomagnetic storms in 2021

Authors: Belakhovsky V.B.¹, Pilipenko V.A.², Sakharov Y.A.¹^,2, Selivanov V.N.³
Affiliations:
1. Polar Geophysical Institute
2. Geophysical Center of the Russian Academy of Sciences
3. Northern Energetics Research Centre, Federal Research Centre “Kola Science Centre of the Russian Academy of Sciences”
Issue: Vol 87, No 2 (2023)
Pages: 271-277
Section: Articles
URL: https://journals.rcsi.science/0367-6765/article/view/135283
DOI: https://doi.org/10.31857/S0367676522700478
EDN: https://elibrary.ru/AITPFO
ID: 135283

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Abstract
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Abstract

We analyzed the growth of geomagnetically induced currents (GIC) recorded in power lines on the Kola Peninsula during two types of magnetic storms: caused by the arrival of a coronal mass ejection (CME) and caused by a high-speed corotating solar wind stream (CIR). The relative efficiency of the CIR of the storm (the ratio of the maximum values of the GIC and the |Dst| index) turned out to be almost 3 times greater than that of the CME of the storm. This is caused by the large contribution of Pi3 geomagnetic pulsations and associated medium-scale vortex current systems in the ionosphere.

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