Volume 116, Number 2, October 2016
|Number of page(s)||6|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||29 November 2016|
Behavior of fast earthward flow near the braking region: Hall MHD simulation
1 School of Nuclear Science and Technology, University of South China - Hengyang 421001, China
2 Institute for Fusion Theory and Simulation, Zhejiang University - Hangzhou, 310027, China
3 School of Electrical Engineering, University of South China - Hengyang 421001, China
Received: 29 July 2016
Accepted: 8 November 2016
Behavior of the fast earthward flow near the braking region in the magnetotail during a substorm is investigated using the Hall MHD simulation. The results indicate that the high-speed earthward plasma flow is associated with fast reconnection in the middle tail. The fast flow is mainly confined in the range . In the region of , due to intermittent magnetic reconnection, the earthward flow exhibits a fluctuating property, i.e., the flow is localized in space and is bursty in time. The pile-up of the magnetic flux and plasma in the near-Earth region leads to formation of the fast-flow braking region or dipolarization front. After colliding into the fast-flow braking region, a part of the Earth flow bounces back, and leads to an intermittent tailward flow in the near-Earth magnetotail.
PACS: 94.30.Lr – Magnetic storms, substorms / 94.30.cs – Plasma motion; plasma convection / 94.30.cp – Magnetic reconnection
© EPLA, 2016
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