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Dynamics of the equatorward boundary of the auroral oval

Technical Report ·
OSTI ID:6699741
; ; ;
The Auroral Boundary Index determined on the basis of DMSP precipitating-electron data is used to examine the expansion and contraction of the auroral oval in the midnight sector. The time scales of the expansion and the contraction of the auroral oval are found to be about 45 minutes and 8 hours, respectively. An empirical formula including these two time scales to predict the oval location from variations in the interplanetary magnetic field (IMF) is devised. The correlation coefficient between the measured and the predicted boundary is 0.82.
Research Organization:
Air Force Geophysics Lab., Hanscom AFB, MA (USA)
OSTI ID:
6699741
Report Number(s):
AD-A-175915/8/XAB; AFGL-TR-87-0001
Country of Publication:
United States
Language:
English

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Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AURORAE
AURORAL OVAL
DOCUMENT TYPES
DYNAMICS
ELECTRIC FIELDS
ELECTRON DENSITY
EXPANSION
INDEXES
INTERPLANETARY MAGNETIC FIELDS
INTERPLANETARY SPACE
MAGNETIC FIELDS
MECHANICS
PLASMA EXPANSION
SPACE