Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm31b0417h&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM31B-0417
Physics
2723 Magnetic Reconnection (7526, 7835), 2744 Magnetotail, 2790 Substorms
Scientific paper
A Hall MHD simulation is conducted to study substorm dynamic processes beginning with a realistic magnetotail. The simulation results indicate that sudden disruption of cross tail current at the near Earth region <15R_E is triggered by fast magnetic reconnection with the reconnection rate >0.1. We observed all substorm phases: early slow growth phase, late impulsive growth phase, substorm onset, and expansion phase with time scales that well agree with the satellite observational time scales. Substantial increases of parallel electric field, field-aligned currents, and large Earthward bulk flow in this simulation are observed immediately after the substorm onset. Our simulation results can explain most of the satellite observational signatures associated with the substorm.
Huang Jianwei
Ma Zhibo
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