Electrostatic field prior to local current sheet disruption

Details Electrostatic field prior to local current sheet disruption Electrostatic field prior to local current sheet disruption

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm43a1726l&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM43A-1726

Physics

2712 Electric Fields (2411), 2790 Substorms

Scientific paper

We present observation of plasma waves in the current sheet across multiple THEMIS satellites in a substorm event on March 5, 2008. It is shown that the arrival of a kinetic ballooning perturbation interacts with the local current sheet to generate a quasi-electrostatic wave a few minutes before local onset, consistent with the prediction that the current sheet thins after the passage of a rarefaction wave. It is proposed that the presence of the quasi-electrostatic field may change the local stability condition and induce local current disruption. Preliminary theoretical calculation is given to substantiate this idea.

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