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Proceedings Paper

Influence of solar wind velocity and Bz IMF on substorm activity during strong magnetic storms
Author(s): Roman N. Boroyev; Mikhail S. Vasiliev
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Paper Abstract

In the present paper dependences of substorm activity on the solar wind velocity and southward component (Bz) of interplanetary magnetic field (IMF) during the main phase of magnetic storms, induced by the CIR and ICME events, is studied. Strong magnetic storms with close values of Dstmin = -100 ± 10 nT are considered. For the period of 1979–2017 there are selected 26 magnetic storms induced by the CIR and ICME (MC + Ejecta) events. It is shown that for the CIR and ICME events the average value of the AE index (AEaver) at the main phase of magnetic storm correlates with the solar wind electric field. The highest correlation coefficient (r = 0.73) is observed for the magnetic storms induced by the CIR events. It is found that the AEaver for magnetic storms induced by ICME events, unlike CIR events, increases with the growth of average value of the southward IMF Bz module. The analysis of dependence between the AEaver and average value of the solar wind velocity (Vswaver) during the main phase of magnetic storm shows that in the CIR events, unlike ICME, the AEaver correlates on the Vswaver.

Paper Details

Date Published: 18 December 2019
PDF: 5 pages
Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112088N (18 December 2019); doi: 10.1117/12.2536401
Show Author Affiliations
Roman N. Boroyev, Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy (Russian Federation)
M.K. Ammosov North-Eastern Federal Univ. (Russian Federation)
Mikhail S. Vasiliev, Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy (Russian Federation)
M.K. Ammosov North-Eastern Federal Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 11208:
25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Oleg A. Romanovskii; Gennadii G. Matvienko, Editor(s)

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