scholarly journals MHD drift ballooning instability near the inner edge of the near‐Earth plasma sheet and its application to substorm onset

1997 ◽  
Vol 102 (A7) ◽  
pp. 14397-14406 ◽  
Author(s):  
Z. Y. Pu ◽  
A. Korth ◽  
Z. X. Chen ◽  
R. H. W. Friedel ◽  
Q. G. Zong ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Substorm Onset ◽  
Ballooning Instability

scholarly journals Alternating bursts of low energy ions and electrons near the substorm onset

2006 ◽  
Vol 24 (7) ◽  
pp. 1957-1968 ◽  
Author(s):  
T. V. Kozelova ◽  
L. L. Lazutin ◽  
B. V. Kozelov ◽  
N. Meredith ◽  
M. A. Danielides
Keyword(s):  
Plasma Sheet ◽  
Substorm Onset ◽  
Low Energy ◽  
Ballooning Instability ◽  
Using Data ◽  
The Moment ◽  
Low Energy Ions ◽  
Late Growth

Abstract. The substorm associated behavior of the low energy particles (30 eV–28.5 keV) near the earthward edge of the plasma sheet is examined using data from CRRES during the late growth and early expansion phases of a substorm on 12 March 1991 and their significance for the substorm onset mechanism is discussed. In this substorm, the CRRES was located on L ~6.3 and ~20° westward of the substorm onset and observed the sequence of the alternating bursts of the low energy ions and electrons. The bursts of the 0.633–9.6 keV ions occurred 1–2 min before the (7.31–21.7 keV) electron bursts. The first ion burst happened 2min before the substorm onset, at the moment of weak brightening of the most equatorial pre-breakup arc near the latitude ~62°. The alternation of the ion and electron bursts may be a signature of a drift-Alfvén ballooning instability on the inner edge of the plasma sheet near substorm onset.

scholarly journals Correlation between ground-based observations of substorm signatures and magnetotail dynamics

2005 ◽  
Vol 23 (3) ◽  
pp. 997-1011 ◽  
Author(s):  
E. Borälv ◽  
H. J. Opgenoorth ◽  
K. Kauristie ◽  
M. Lester ◽  
J.-M. Bosqued ◽  
...  
Keyword(s):  
Solar Wind ◽  
Event Study ◽  
Plasma Sheet ◽  
Sheet Thickness ◽  
Substorm Onset ◽  
Boundary Motion ◽  
Thickness Variations ◽  
Magnetotail Dynamics

Abstract. We present a substorm event study using the four Cluster spacecraft in combination with ground-based instruments, in order to perform simultaneous observations in the ionosphere and magnetotail. We show good correlation between substorm signatures on the ground and in the magnetotail, even though data from the northern-ground and southern-tail hemispheres are compared. During this event ground-based magnetometers show a substorm onset over Scandinavia in the pre-midnight sector. Within 1.5h the onset and three intensifications are apparent in the magnetograms. For all the substorm signatures seen on the ground, corresponding plasma sheet boundary motion is visible at Cluster, located at a downtail distance of 18.5 RE. As a result of the substorm onset and intensifications, Cluster moves in and out between the southern plasma sheet and lobe. Due to the lack of an apparent solar wind driver and the good correlation between substorm signatures on the ground, we conclude the substorm itself is the driver for these plasma sheet dynamics. We show that in the scales of Cluster inter-spacecraft distances (~0.5 RE) the inferred plasma sheet motion is often directed in both Ygsm- and Zgsm-directions, and discuss this finding in the context of previous studies of tail flapping and plasma sheet thickness variations.

Nonadiabatic heating of the central plasma sheet at substorm onset

1992 ◽  
Vol 97 (A2) ◽  
pp. 1481 ◽  
Author(s):  
C. Y. Huang ◽  
L. A. Frank ◽  
G. Rostoker ◽  
J. Fennell ◽  
D. G. Mitchell
Keyword(s):  
Plasma Sheet ◽  
Substorm Onset ◽  
Central Plasma ◽  
Central Plasma Sheet

scholarly journals Enhanced transport across entire length of plasma sheet boundary field lines leading to substorm onset

2010 ◽  
Vol 115 (A5) ◽  
pp. n/a-n/a ◽  
Author(s):  
L. R. Lyons ◽  
Y. Nishimura ◽  
X. Xing ◽  
V. Angelopoulos ◽  
S. Zou ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Substorm Onset ◽  
Entire Length ◽  
Boundary Field ◽  
Field Lines

scholarly journals Ionospheric signatures of a plasma sheet rebound flow during a substorm onset

2013 ◽  
Vol 118 (1) ◽  
pp. 350-363 ◽  
Author(s):  
L. Juusola ◽  
M. Kubyshkina ◽  
R. Nakamura ◽  
T. Pitkänen ◽  
O. Amm ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Substorm Onset

scholarly journals Near-Earth plasma sheet azimuthal pressure gradient and associated auroral development soon before substorm onset

2011 ◽  
Vol 116 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
X. Xing ◽  
L. R. Lyons ◽  
Y. Nishimura ◽  
V. Angelopoulos ◽  
E. Donovan ◽  
...  
Keyword(s):  
Pressure Gradient ◽  
Plasma Sheet ◽  
Substorm Onset

A multisatellite study of the plasma sheet dynamics at substorm onset

1984 ◽  
Vol 11 (5) ◽  
pp. 500-503 ◽  
Author(s):  
J. A. Sauvaud ◽  
A. Saint-Marc ◽  
J. Dandouras ◽  
H. Rème ◽  
A. Korth ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Substorm Onset
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