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Kubyshkina, Marina
Semenov, Vladimir
Erkaev, Nikolay
Gordeev, Evgeny
Dubyagin, Stepan
Ganushkina, Natalia
Shukhtina, Maria
2019-07-01T07:29:12Z
2019-07-01T07:29:12Z
2018
Kubyshkina, Marina. Relations Between vz and Bx Components in Solar Wind and their Effect on Substorm Onset [Текст] / Marina Kubyshkina, Vladimir Semenov, Nikolay Erkaev, Evgeny Gordeev, Stepan Dubyagin, Natalia Ganushkina, Maria Shukhtina // Geophysical Research Letters. — 2018. — Т. 45 (№ 9). — С. 3760-3767
00948276
https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017GL076268
https://elib.sfu-kras.ru/handle/2311/111311
We analyze two substorm onset lists, produced by different methods, and show that the (Bx·vz) product of the solar wind (SW) velocity and interplanetary magnetic field (IMF) components for two thirds of all substorm onsets has the same sign as IMF Bz. The explanation we suggest is the efficient displacement of the magnetospheric plasma sheet due to IMF Bx and SW flow vz, which both force the plasma sheet moving in one direction if the sign of (Bx·vz) correlates with the sign Bz. The displacement of the current sheet, in its turn, increases the asymmetry of the magnetotail and can alter the threshold of substorm instabilities. We study the SW and IMF data for the 15-year period (which comprises two substorm lists periods and the whole solar cycle) and reveal the similar asymmetry in the SW, so that the sign of (Bx·vz) coincides with the sign of IMF Bz during about two thirds of all the time. This disproportion can be explained if we admit that about 66% of IMF Bz component is transported to the Earth's orbit by the Alfvén waves with antisunward velocities.
magnetosphere
substorm
magnetotail configuration
substorm trigger
Relations Between vz and Bx Components in Solar Wind and their Effect on Substorm Onset
Journal Article
Journal Article Preprint
3760-3767
89.53.31
2019-07-01T07:29:12Z
10.1002/2017GL076268
Политехнический институт
Кафедра прикладной механики
Geophysical Research Letters
Q1
Q1


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