Electric and magnetic components of ballooning perturbations in the magnetotail plasma sheet before breakup
- 作者: Kogai T.G.1, Golovchanskaya I.V.1, Kornilov I.A.1, Kornilova T.A.1, Fedorenko Y.V.1
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隶属关系:
- Polar Geophysical Institute
- 期: 卷 56, 编号 1 (2016)
- 页面: 8-18
- 栏目: Article
- URL: https://journals.rcsi.science/0016-7932/article/view/155531
- DOI: https://doi.org/10.1134/S0016793216010084
- ID: 155531
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详细
Using data from THEMIS spacecraft we investigated transverse to the magnetic field mutually perpendicular electric and magnetic components of ballooning type perturbations with periods 60–240 s, which are observed in the magnetospheric plasma sheet during the period preceding substorm onset. With applying Hilbert transform, we analyzed the phase relations between them. It is shown that the perturbations are dominated by radial electric and azimuthal magnetic (that is, toroidal) components which are usually in phase or out-of-phase. Along with them, approximately 2.5 times less intense azimuthal electric and radial magnetic components are present, which are more often phase-shifted by π/2. It is concluded that the observed perturbations are not a simple consequence of the development of plasma sheet ballooning instability, leading to the growth of strongly elongated along the magnetotail ballooning structures. It is pointed out that this conclusion is confirmed by simultaneous ground-based observations of magnetically conjugate auroral structures.
作者简介
T. Kogai
Polar Geophysical Institute
Email: golovchanskaya@pgia.ru
俄罗斯联邦, 26a, Academgorodok, Apatity, 184200
I. Golovchanskaya
Polar Geophysical Institute
编辑信件的主要联系方式.
Email: golovchanskaya@pgia.ru
俄罗斯联邦, 26a, Academgorodok, Apatity, 184200
I. Kornilov
Polar Geophysical Institute
Email: golovchanskaya@pgia.ru
俄罗斯联邦, 26a, Academgorodok, Apatity, 184200
T. Kornilova
Polar Geophysical Institute
Email: golovchanskaya@pgia.ru
俄罗斯联邦, 26a, Academgorodok, Apatity, 184200
Y. Fedorenko
Polar Geophysical Institute
Email: golovchanskaya@pgia.ru
俄罗斯联邦, 26a, Academgorodok, Apatity, 184200
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