Simultaneous THEMIS in situ and auroral observations of a small substorm

被引：84

作者：

Donovan, E. ^{[1
]}

Liu, W. ^{[2
]}

Liang, J. ^{[2
]}

Spanswick, E. ^{[1
]}

Voronkov, I. ^{[3
]}

Connors, M. ^{[3
]}

Syrjasuo, M. ^{[4
]}

Baker, G. ^{[1
]}

Jackel, B. ^{[1
]}

Trondsen, T. ^{[1
]}

Greffen, M. ^{[1
]}

Angelopoulos, V. ^{[5
]}

Russell, C. T. ^{[5
]}

Mende, S. B. ^{[6
]}

Frey, H. U. ^{[6
]}

Keiling, A. ^{[6
]}

Carlson, C. W. ^{[6
]}

McFadden, J. P. ^{[6
]}

Glassmeier, K. -H. ^{[7
]}

Auster, U. ^{[7
]}

Hayashi, K. ^{[8
]}

Sakaguchi, K. ^{[9
]}

Shiokawa, K. ^{[9
]}

Wild, J. A. ^{[10
]}

Rae, I. J. ^{[11
]}

机构：

[1] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[2] Canadian Space Agcy, Div Space Sci, St Hubert, PQ J3Y 8Y9, Canada

[3] Athabasca Univ, Geophys Observ, Athabasca, AB T9S 3A3, Canada

[4] Finnish Meteorol Inst, FI-00101 Helsinki, Finland

[5] Univ Calif Los Angeles, IGPP, Los Angeles, CA 90095 USA

[6] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[7] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterr Phys, D-38106 Braunschweig, Germany

[8] Univ Tokyo, Dept Earth & Planetary Phys, Bunkyo Ku, Tokyo, Japan

[9] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan

[10] Univ Lancaster, Dept Commun Syst, Lancaster, England

[11] Univ Alberta, Dept Phys, Edmonton, AB, Canada

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 17期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1029/2008GL033794

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present ground-based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground-based imagers. At similar to 0507 UT there was an optical onset on inner CPS field lines. This involved near-simultaneous brightening of 1 MLT hour longitudinal segment of the onset arc. The part of the arc that brightened was that closest to the equatorward boundary of the diffuse ( proton) aurora. Within one minute, a dipolarization front moved across four THEMIS satellites. Based on their locations, the order in which they detected the dipolarization front, and the auroral evolution, we assert that the expansion phase began earthward of the four satellites and evolved radially outwards. We conclude that this onset occurred in an azimuthally localized region of highly stretched field lines.

引用

页数：5

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