Characteristics of the Flank Magnetopause: THEMIS Observations

被引：30
作者：
Haaland, S. [1 ,2 ]
Runov, A. [3 ]
Artemyev, A. [3 ,4 ]
Angelopoulos, V [3 ]
机构：
[1] Univ Bergen, Birkeland Ctr Space Sci, Bergen, Norway
[2] Max Planck Inst Solar Syst Res, Gottingen, Germany
[3] Univ Calif Los Angeles, Dept Space Phys, Los Angeles, CA USA
[4] Russian Acad Sci, Space Res Inst, Moscow, Russia
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2019年 / 124卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
SPATIAL-DISTRIBUTION; BOUNDARY-LAYER; PLASMA; MAGNETOSHEATH; ASYMMETRY; WIND; DISCONTINUITIES; MINIMIZATION; ORIENTATION; THICKNESS;
D O I：
10.1029/2019JA026459
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The terrestrial magnetopause is the boundary that shields the Earth's magnetosphere on one side from the shocked solar wind and its embedded interplanetary magnetic field on the other side. In this paper, we show observations from two of the Time History of Events and Macroscales Interactions during Substorms (THEMIS) satellites, comparing dayside magnetopause crossings with flank crossings near the terminator. Macroscopic properties such as current sheet thickness, motion, and current density are examined for a large number of magnetopause crossings. The results show that the flank magnetopause is typically thicker than the dayside magnetopause and has a lower current density. Consistent with earlier results from Cluster observations, we also find a persistent dawn-dusk asymmetry with a thicker and more dynamic magnetopause at dawn than at dusk.
引用
收藏
页码：3421 / 3435
页数：15
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