Interplanetary magnetic field B sub y effects on the magnetic field at synchronous orbit

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA092iA10p11215· OSTI ID:5875435

Nagai, T ^[1]

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1. Meteorological Research Inst., Ibaraki (Japan)

GOES 3 magnetic field data are analyzed to reveal interplanetary magnetic field (IMF) B{sub y} effects on the magnetic field configuration near the magnetic equatorial plane at synchronous orbit. The magnetic equatorial plane on the nightside moves upward (northward) in the evening sector and downward (southward) in the morning sector for the positive IMF B{sub y}. The magnetic equatorial plane moves in the opposite sense for the negative IMF B{sub y}. A perturbation appears in the azimuthal component of the magnetic field in the midnight sector (2100-0300 LT), and its magnitude is a fraction 0.3 of the IMF {beta}{sub gamma} near midnight. These changes are attributable to the IMF B{sub y}-induced asymmetry of the reconnection. Observations of substorm-associated field-aligned current effects depend strongly on the geometry of synchronous spacecraft relative to these currents so that the IMF B{sub y}-induced distortion of the magnetic equatorial plane produces apparent IMF B{sub y} effects on D observations during substorms.

• OSTI ID: 5875435
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 92:A10; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CURRENTS
DATA ANALYSIS
ELECTRIC CURRENTS
GEOMAGNETIC FIELD
GOES SATELLITES
INTERPLANETARY MAGNETIC FIELDS
MAGNETIC BAYS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MAGNETIC RECONNECTION
ORBITS
SATELLITES
VARIATIONS