HR: 16:15h
AN: SM22D-02 [PDF]
TI: A macroscopic / microscopic view of a substorm
AU: * Elphic, R
EM: relphic@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Taylor, M C
EM: mggtt@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Friedel, R H
EM: friedel@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Reeves, G D
EM: reeves@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Henderson, M G
EM: mhenderson@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Thomsen, M F
EM: mthomsen@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Birn, J
EM: jbirn@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Rae, J
EM: jrae@Space.UAlberta.CA
AF: Space Physics Group, University of Alberta, Alberta, T6G 2J1
Canada
AU: Slavin, J A
EM: James.A.Slavin@nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, 20771 United States
AU: Lavraud, B
EM: Benoit.Lavraud@cesr.fr
AF: CESR, 9 avenue du colonel Roche, Toulouse, 31028
France
AU: Aasnes, A
EM: aasnes@lanl.gov
AF: Space and Atmospheric Sciences, Los Alamos National Lab, Los Alamos, 87545 United States
AU: Aasnes, A
EM: aasnes@lanl.gov
AF: Institute of Physics, University of Bergen, Bergen, 5007
Norway
AU: Balogh, A
EM: a.balogh@ic.ac.uk
AF: Space and Atmospheric Physics group, Imperial College, London, SW7
United Kingdom
AU: Daly, P W
EM: Daly@linmpi.mpg.de
AF: Max-Planck-Institut fr Aeronomie, Max-Planck-Str. 2, Katlenburg-Lindau, D-37191
Germany
AU: Dunlop, M W
EM: M.W.Dunlop@rl.ac.uk
AF: Rutherford Appleton Laboratory, Space Sciences Division, Didcot, OX11 OQX
United Kingdom
AU: Fazakerley, A N
EM: anf@mssl.ucl.ac.uk
AF: Mullard Space Science Lab, University College London, Holmbury St. Mary, RH5 6nt
United Kingdom
AU: Fritz, T A
EM: fritz@bu.edu
AF: Centre of Space Physics, Boston University, Boston, 02215 United States
AU: Reme, H
EM: Henri.Reme@cesr.fr
AF: CESR, 9 avenue du colonel Roche, Toulouse, 31028
France
AU: Scudder, J
EM: jds@space-theory.physics.uiowa.edu
AF: Department of Physics and Astronomy, University of Iowa, Iowa City, 52240 United States
AB:
In this paper we study a plasma sheet thinning event which took place on 11th August 2002, while CLUSTER was located in the
nightside, northern hemisphere of the magnetosphere in the plasma sheet/plasma sheet boundary layer. This event took place
during a period of quite low Dst but high AE, with substorm signatures observed by ground based measurements and the Los
Alamos instruments aboard geosynchronous spacecraft coincident with the plasma sheet thinning observed by both CLUSTER and
POLAR.
Just prior to the plasma sheet thinning and entrance into the lobe, the CLUSTER tetrahedron observed a tailward moving
travelling compression region, as identified by magnetic field measurements from the FGM (Flux Gate Magnetometer) instrument.
At this time the IES/RAPID (Imaging Electron Spectrometer/Research with Adaptive Particle Imaging Detectors) and PEACE
(Plasma Electron and Current Experiment) instruments on CLUSTER 3 observved a highly collimated field aligned electron beam.
By combining groundbased and multi-point spacebased (magnetospheric and up-stream) observations we are able to construct a
detailed macroscopic picture of the evolution of this substorm as well as a more microscopic description of the local
phenomena at CLUSTER. We study the possible relationship of the beam to reconnection separatrix formation and evolution.
DE: 2744 Magnetotail
DE: 2764 Plasma sheet
DE: 2788 Storms and substorms
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting