| Chen and Wolf [1999] used a thin-filament theory to construct a 2D model of a bursty bulk
flow (BBF) motion inside the plasma sheet. The modeling revealed that the low-entropy
filament overshoots its equilibrium position and executes a heavily damped oscillation about
that position. In this talk we demonstrate, for the first time, the multiple overshoot and
rebound of a BBF observed by the five THEMIS probes on 17 March 2008 just
after 10:22 UT. We found that the BBF oscillatory braking was accompanied by
interlaced enhancements and depletions of radial pressure gradients. The earthward and
tailward flow bursts caused formation of vortices with opposite sense of rotation. |