Email this article Intensive Substorms During the Main Phase of the Magnetic Storm on March 23-24, 2023
- Authors: Gromova L.I.1, Kleymenova N.G.2, Gromov S.V.1, Kanonidi K.K.1, Petrov V.G.1, Malysheva L.M.2
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Affiliations:
- Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences
- Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
- Issue: Vol 64, No 6 (2024)
- Pages: 760-770
- Section: Articles
- URL: https://journals.rcsi.science/0016-7940/article/view/283261
- DOI: https://doi.org/10.31857/S0016794024060041
- EDN: https://elibrary.ru/QOOTXJ
- ID: 283261
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Abstract
Here we studied the planetary features of the spatiotemporal distribution of ionospheric electrojets recorded in the substorm onset and in the time on the activity maximum of three very intense substorms (with the AL-index from -1200 nT to -1700 nT) observed during the main phase of the strong magnetic storm on 23−24 March 2023. We analyze the substorms by applying the global maps of the planetary distribution of the high-latitude ionospheric currents, constructed on the basis of the simultaneous magnetic measurements on 66 low-orbit satellites of the AMPERE project, as well as the ground-based magnetograms from the Scandinavian IMAGE profile and mid-latitude IZMIRAN stations located in the same longitudinal region. It was established that the onset of all the studied substorms at the IMAGE meridian was accompanied by the development of a night-time current vortex with a clockwise rotation direction that is an indicator of the downward field-aligned currents increasing. The ground-based mid-latitude observations at the IZMIRAN station network confirmed that the center of the substorm current wedge was located in the night-time sector significantly east of the IMAGE meridian. In the time of the substorm intensity maximum, a similar but more extensive current vortex was observed in the morning sector, that fact is, probably, typical for intense substorms.
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About the authors
L. I. Gromova
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences
Author for correspondence.
Email: gromova@izmiran.ru
Russian Federation, Troitsk
N. G. Kleymenova
Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
Email: ngk1935@yandex.ru
Russian Federation, Moscow
S. V. Gromov
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences
Email: gromova@izmiran.ru
Russian Federation, Troitsk
K. Kh. Kanonidi
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences
Email: gromova@izmiran.ru
Russian Federation, Troitsk
V. G. Petrov
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences
Email: gromova@izmiran.ru
Russian Federation, Troitsk
L. M. Malysheva
Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
Email: ngk1935@yandex.ru
Russian Federation, Moscow
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