European Geosciences Union, Annales Geophysicae, 3(26), p. 709-724, 2008
DOI: 10.5194/angeo-26-709-2008
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<p><strong>Abstract.</strong> A detailed analysis of successive tailward flow bursts in the near-Earth magnetotail (<I>X</I>~&minus;19 <I>R<sub>E</sub></I>) 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 (<I>V<sub>x</sub></I>&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 (<I>B<sub>x</sub></I>&asymp;0) and the level of <I>B<sub>x</sub></I>&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.</p>