HR: 1340h
AN: SM13A-1184    [Abstracts]
TI: Multi-Spacecraft Comparisons of Intense Activity at Low Auroral Latitudes During Major Geomagnetic Storms
AU: * Dombeck, J
EM: johnd@fields.space.umn.edu
AF: School of Physics and Astronomy, University of Minnesota, Tate Lab of Physics 116 Church St., Minneapolis, MN 55455 United States
AU: Cattell, C
EM: cattell@fields.space.umn.edu
AF: School of Physics and Astronomy, University of Minnesota, Tate Lab of Physics 116 Church St., Minneapolis, MN 55455 United States
AU: Wygant, J
EM: wygant@fields.space.umn.edu
AF: School of Physics and Astronomy, University of Minnesota, Tate Lab of Physics 116 Church St., Minneapolis, MN 55455 United States
AU: Andre, M
EM: mats.andre@irfu.se
AF: Swedish Institute of Physics, Box 537, Uppsala, SE 751 21 Sweden
AU: Balogh, A
EM: a.balogh@imperial.ac.uk
AF: Imperial College of Science, Technology, and Medicine, Blackett Laboratory Prince Consort Rd., London, UK SW7 2BW United Kingdom
AU: Kletzing, C
EM: craig-kletzing@uiowa.edu
AF: Institute of Geophysics and Planetary Physics, University of Iowa, Dept. of Physics and Astronomy Van Allen Hall, Iowa City, IA 52242 United States
AU: Kozyra, J
EM: jukozyra@engin.umich.edu
AF: Space Physics Research Laboratory, University of Michigan, 2455 Hayward St., Ann Arbor, MI 48109 United States
AU: Parks, G
EM: parks@ssl.berkeley.edu
AF: Space Sciences Laboratory, University of California, 7 Gauss Way, Berkeley, CA 94720 United States
AU: Thomsen, M
EM: mthomsen@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Laboratory, MS D466, Los Alamos, NM 87545 United States
AB: Major geomagnetic storms (DST $<$ $\sim$ -200 nT) while quite rare (only $\sim$18 have occurred within the past 5 years) produce dramatic activity within most regions of the earth's magnetosphere, providing an opportunity to study the coupling of these different regions under extreme conditions. Possibly the most prominent type of activity common to such storms is a variety of aurora at low auroral zone latitudes, well equatorward of the standard Region I/II current systems. We present results of a study of such events where intense downgoing electron fluxes are observed in the FAST spacecraft data at altitudes of 3000-4000 km. We compare the particle distributions, and electric and magnetic wave characteristics at FAST during these events with concurrent data from spacecraft which are located at similar latitudes and local times to FAST but in more distant regions of the magnetosphere, at 5-10 R$_{E}$, including the Cluster, Polar, and several geosynchronous satellites. We also compare the in situ data with spacecraft auroral images. In particular, we investigate how observed low latitude aurora and their associated downward electron flux at FAST altitudes are coupled to conditions at 5-10 R$_{E}$ during major geomagnetic storms.
DE: 2716 Energetic particles, precipitating
DE: 2730 Magnetosphere--inner
DE: 2731 Magnetosphere--outer
DE: 2772 Plasma waves and instabilities
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting