HR: 1340h
AN: SM23B-0426 [Abstracts]
TI: Dynamical Structure of the Cross-tail Current Sheet During Substorms Observed by Cluster
AU: * Asano, Y
EM: yoshihiro.asano@oeaw.ac.at
AF: Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, 8042
Austria
AU: Nakamura, R
EM: rumi.nakamura@oeaw.ac.at
AF: Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, 8042
Austria
AU: Runov, A
EM: andrei.runov@oeaw.ac.at
AF: Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, 8042
Austria
AU: Takada, T
EM: taku.takada@oeaw.ac.at
AF: Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, 8042
Austria
AU: Baumjohann, W
EM: baumjohann@oeaw.ac.at
AF: Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, 8042
Austria
AU: Balogh, A
EM: a.balogh@imperial.ac.uk
AF: Imperial College, H/6M67A, Huxley Building, London, SW7 2AZ
United Kingdom
AU: Klecker, B
EM: berndt.klecker@mpe.mpg.de
AF: Max-Planck-Institut für Extraterrestrische Physik, Postfack 1312, Garching, 85741
Germany
AU: Rème, H
EM: Reme@cesr.fr
AF: CESR/CNRS, BP4346, Toulouse, 31028
France
AB:
We report on the dynamical variation of the current sheet structure in the magnetotail using magnetic field and plasma data
obtained by the Cluster multi-satellites. It is found that in some cases the thickness of the cross-tail current sheet shows
temporal variations repeatedly.
This sausage-mode-like variation is associated with substorm onsets or occurrence of fast plasma flows, with the time scale
of several minutes before substorm onsets or fast flows and of a half to one minute afterwards.
It frequently coexists with kink-mode-like wave or flapping motion. Such sausage-mode-like variation is mainly observed in
the central part of the plasma sheet, and forms transient bifurcated currents or the intense current in the center.
DE: 2721 Field-aligned currents and current systems (2409)
DE: 2740 Magnetospheric configuration and dynamics
DE: 2764 Plasma sheet
DE: 2790 Substorms
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005