Association of plasma sheet variations with auroral changes during substorms

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6907757

Hones, Jr, E W; Craven, J D; Frank, L A; Parks, G K

Images of the southern auroral oval taken by the University of Iowa auroral imaging instrumentation on the Dynamics Explorer 1 satellite during an isolated substorm are correlated with plasma measurements made concurrently by the ISEE 1 satellite in the magnetotail. Qualitative magnetic field configuration changes necessary to relate the plasma sheet boundary location to the latitude of the auroras are discussed. Evidence is presented that the longitudinal advances of the auroras after expansive phase onset are mappings of a neutral line lengthening across the near-tail. We observe a rapid poleward auroral surge, occurring about 1 hour after expansive phase onset, to coincide with the peak of the AL index and argue that the total set of observations at that time is consistent with the picture of a /open quotes/poleward leap/close quotes/ of the electrojet marking the beginning of the substorm's recovery. 9 refs. 3 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6907757
• Report Number(s): LA-UR-88-2223; CONF-880780-2; ON: DE88014319
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAL OVAL
DATA
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
EARTH PLANET
EXPERIMENTAL DATA
IMAGES
INFORMATION
MEASURING INSTRUMENTS
NUMERICAL DATA
PLANETS
PLASMA SHEET
SOUTHERN HEMISPHERE
THEORETICAL DATA
VARIATIONS