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Cluster and TC-1 observation of magnetic holes in the plasma sheet
Lucek, E.; Dunlop, M. W.; Carr, C. +10 more
Magnetic holes with relatively small scale sizes, detected by Cluster and TC-1 in the magnetotail plasma sheet, are studied in this paper. It is found that these magnetic holes are spatial structures and they are not magnetic depressions generated by the flapping movement of the magnetotail current sheet. Most of the magnetic holes (93%) were obse…
Spatial distribution of rolled up Kelvin-Helmholtz vortices at Earth's dayside and flank magnetopause
Berchem, J.; Escoubet, C. P.; Eastwood, J. P. +21 more
The Kelvin-Helmholtz Instability (KHI) can drive waves at the magnetopause. These waves can grow to form rolled-up vortices and facilitate transfer of plasma into the magnetosphere. To investigate the persistence and frequency of such waves at the magnetopause we have carried out a survey of all Double Star 1 magnetopause crossings, using a combin…
The statistical studies of the inner boundary of plasma sheet
Dandouras, I.; Cao, J. B.; Ding, W. Z. +4 more
The penetration of plasma sheet ions into the inner magnetosphere is very important to the inner magnetospheric dynamics since plasma sheet ions are one of the major particle sources of ring current during storm times. However, the direct observations of the inner boundary of the plasma sheet are fairly rare due to the limited number of satellites…
Corrigendum to "The statistical studies of the inner boundary of plasma sheet" published in Ann. Geophys., 29, 289-298, 2011
Dandouras, I.; Cao, J. B.; Ding, W. Z. +4 more
No abstract available.
Interplanetary shock transmitted into the Earth's magnetosheath: Cluster and Double Star observations
Rème, H.; Cao, J. B.; Carr, C. M. +4 more
On day 7 May 2005, the plasma instruments on board Double Star TC1 and Cluster SC3 spacecraft register inside the magnetosheath, at 19:15:12 and 19:16:20 UT, respectively, a strong pressure pulse due to the impact of an interplanetary shock wave (IS) on the terrestrial bow shock. The analysis of this event provides clear and quantitative evidences…
The large-scale magnetospheric electric field observed by Double Star TC-1
Rème, H.; Carr, C.; Liu, Z. X. +4 more
The relationship between the average structure of the inner magnetospheric large-scale electric field and geomagnetic activity levels has been investigated by Double Star TC-1 data for radial distances ρ between 4.5 RE and 12.5 RE and MLT between 18:00 h and 06:00 h from July to October in 2004 and 2005. The sunward component…
Cluster and Double Star multipoint observations of a plasma bubble
Zhang, T. L.; Dandouras, I.; Lucek, E. +14 more
Depleted flux tubes, or plasma bubbles, are one possible explanation of bursty bulk flows, which are transient high speed flows thought to be responsible for a large proportion of flux transport in the magnetotail. Here we report observations of one such plasma bubble, made by the four Cluster spacecraft and Double Star TC-2 around 14:00 UT on 21 …
Shape, size, velocity and field-aligned currents of dayside plasma injections: a multi-altitude study
Pitout, F.; Fazakerley, A. N.; Dunlop, M. W. +3 more
On 20 February 2005, Cluster in the outer magnetosphere and Double Star-2 (TC-2) at mid-altitude are situated in the vicinity of the northern cusp/mantle, with Cluster moving sunward and TC-2 anti-sunward. Their magnetic footprints come very close together at about 15:28 UT, over the common field-of-view of SuperDARN radars. Thanks to this conjunc…
Magnetosheath excursion and the relevant transport process at the magnetopause
Dandouras, I.; Rème, H.; Cao, J. B. +5 more
A large-amplitude excursion of the magnetosheath (MS) in quiet solar wind conditions on 17 March 2004 was recorded simultaneously by the Cluster and TC-1 spacecraft. During this period, the IMF Bz was entirely northward. The coherence between the bow shock motion and magnetopause (MP) motion is revealed and the excursion velocities of t…
Mirror waves and mode transition observed in the magnetosheath by Double Star TC-1
Zhang, T. L.; Wang, C.; Volwerk, M. +2 more
The Double Star TC-1 magnetosheath pass on 26 February 2004 is used to investigate magnetic field fluctuations. Strong compressional signatures which last for more than an hour have been found near the magnetopause behind a quasi-perpendicular bow shock. These compressional structures are most likely mirror mode waves. There is a clear wave transi…