Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29t...3n&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 20, pp. 3-1, CiteID 1942, DOI 10.1029/2002GL015763
Physics
28
Magnetospheric Physics: Plasma Convection, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Plasma Sheet, Magnetospheric Physics: Magnetosphere-Outer
Scientific paper
In this paper we study a flow burst event which took place during enhanced geomagnetic activity on July 22, 2001, when Cluster was located in the postmidnight magnetotail. The flow burst was associated with a clear dipolarization ahead of the high-speed part of the predominantly Earthward directed flow. Based on the analysis of the four spacecraft data, we found that a ~2000 km thick dipolarization front moves Earthward and dawnward with a speed of ~77 km/s. The plasma before this front is deflected, consistent with the plasma ahead of a localized plasma bubble centered at midnight side being pushed aside by the moving obstacle. The main body of the high-speed flow is directed mainly parallel to the dipolarization front. These observations indicate that the evolution of the dipolarization front across the tail is directly coupled with the fast flow.
Balogh André
Baumjohann Wolfgang
Bogdanova Y.
Bosqued Jean Michel
Dandouras Iannis
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