Growth Phase Current Sheet and Substorm Processes

Details Growth Phase Current Sheet and Substorm Processes Growth Phase Current Sheet and Substorm Processes

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm51b..01c&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SM51B-01

Physics

2740 Magnetospheric Configuration And Dynamics, 2752 Mhd Waves And Instabilities, 2764 Plasma Sheet, 2788 Storms And Substorms

Scientific paper

We present POLAR observation of a substorm event from growth phase to substorm expansion. We also make use of the particle pressure computed from HYDRA data along the POLAR orbit to model the 3D structure of the current sheet in the near-Earth region (~ 8-10 RE) during the growth phase. We will also show the magnetic field fluctuations associated with the substorm activity. In particular, we find that the substorm turbulence activity consists of fluctuations with period of about 60 seconds (in the Pi 2 range) to waves with period of a few seconds, consistent with previous observations by AMPTE/CCE and Geotail. We will also show numerical solutions of kinetic ballooning modes for the modeled 3D equilibrium.

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