Global evolution of the high energy magnetospheric electron population during substorms.

Details Global evolution of the high energy magnetospheric electron population during substorms. Global evolution of the high energy magnetospheric electron population during substorms.

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm22b..05d&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM22B-05

Physics

2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics

Scientific paper

The substorm phenomenology of the magnetospheric high energy electron population has been thoroughly studied with geosynchronous particle observations. We have a much less developed understanding of the radial extent and evolution of, for example, substorm injections. Riometer absorption has been shown to be a good proxy for the integrated high energy electron flux near the equatorial plane, provided specific conditions are met [Baker et al., JGR, 86, 2295, 1981]. In recent work, we are attempting to map out, in advance of NASA's upcoming Time History of Events and Mesoscale Interactions During Substorms (THEMIS) project, the capabilities and limitations of the three techniques we now have (ie., X-ray imaging, riometers, and in situ particle observations) to characterize the mesoscale response of the high energy electron population to this most dynamic phase of the substorm. In this paper, we use data from a latitudinally distributed array of riometers in conjunction with in situ particle data and global X-ray images to explore the L-value dependence of the evolution of the high energy electron population during the substorm expansive phase.

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