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Structure of the near-Earth plasma sheet during tailward flows

Runov, A; Voronkov, I; Asano, Y; Baumjohann, W; Fujimoto, M; Nakamura, R; Takada, T; ... Balogh, A; + view all (2008) Structure of the near-Earth plasma sheet during tailward flows. Annales Geophysicae , 26 (3) pp. 709-724. 10.5194/angeo-26-709-2008. Gold open access

Abstract

A detailed analysis of successive tailward flow bursts in the near-Earth magnetotail (X∼ & minus;19 R E ) plasma sheet is performed on the basis of in-situ multi-point observations by the Cluster spacecraft on 15 September 2001. The tailward flows were detected during a northward IMF interval, 2.5 h after a substorm expansion. Each flow burst (V x & lt;300 km/s) was associated with local auroral activation. Enhancements of the parallel and anti-parallel ∼1 keV electron flux were detected during the flows. The spacecraft configuration enables to monitor the neutral sheet (B x & asymp;0) and the level of B x & asymp;10 & ndash;15 nT simultaneously, giving a possibility to distinguish between closed plasmoid-like structures and open NFTE-like surges. The data analysis shows NFTE-like structures and localized current filaments embedded into the tailward plasma flow. 3-D shapes of the structures were reconstructed using the four-point magnetic filed measurements and the particle data.

Type: Article
Title: Structure of the near-Earth plasma sheet during tailward flows
Open access status: An open access publication
DOI: 10.5194/angeo-26-709-2008
URI: http://discovery.ucl.ac.uk/id/eprint/165074
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