Simulation of IMAGE Observations of a Substorm Injection on June 10, 2000

Details Simulation of IMAGE Observations of a Substorm Injection on June 10, 2000 Simulation of IMAGE Observations of a Substorm Injection on June 10, 2000

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm21a04m&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM21A-04

Physics

2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2778 Ring Current, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

The High Energy Neutral Atom (HENA) instrument on the IMAGE spacecraft has demonstrated gradient and curvature drift of ions injected into the outer magnetosphere (L = 7) during a substorm [Mitchell et al., 2001]. Subsequent simulation has shown that the details of the time history of the HENA images can be closely reproduced using a kinetic ion transport model, for which the plasma sheet ion distribution is specified and then particle trajectories at all energies are traced in the magnetic and electric field configuration as modeled using the Tsyganenko 1989 magnetic field and the Stern-Volland electric field (both parametrized by Kp). A critical ingredient is the inclusion of widespread induced electric fields obtained by dipolarizing the magnetic field model with a time profile that closely reproduces induction electric field observations. Results of this comparison will be shown. In addition, an aspect of this event not previously stressed, namely the broad local-time extent of the injected drifting ion cloud, will be presented. Mitchell, D. G. K. C. Hsieh, C. C. Curtis, D. C. Hamilton, H. D. Voss, E. C. Roelof, P. C:son-Brandt, Imaging Two Geomagnetic Storms in Energetic Neutral Atoms, Geophys. Res. Lett, 28, in press, 2001

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