Cluster observations of magnetospheric substorm expansion and recovery phase features in the near- and mid-tail regions: Comparison with numerical simulations

Details Cluster observations of magnetospheric substorm expansion and recovery phase features in the near- and mid-tail regions: Comparison with numerical simulations Cluster observations of magnetospheric substorm expansion and recovery phase features in the near- and mid-tail regions: Comparison with numerical simulations

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm14a..03f&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM14A-03

Physics

2731 Magnetosphere: Outer, 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

The Cluster constellation of spacecraft is well-suited for the study of plasma sheet thinning and expansion associated with magnetospheric substorm dynamics in the magnetotail. The Cluster orbital apogee of r = 19 R_E often places the spacecraft set in a good location to be close to the subtorm neutral line position. Starting with RAPID energetic particle data from the Cluster spacecraft, we have identified numerous clear substorm events in the 2001 through 2004 tail passage seasons. We have also examined corresponding events in POLAR and geostationary orbit data sets. We find that thinning/expansion sequences are observable quite broadly over large radial and azimuthal distances in most events. However, details of particle burst phenomena differ markedly with radial distance. We compare observational results with numerical simulations of the matnetospheric dynamical processes. We focus on the implications for substorm models in this presentation.

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