On the Farley instability in the polar cap E region
Abstract
The slant E condition (SEC) on polar cap ionograms is shown to be a signature for the Farley instability in the polar cap E region. A correlation is found between the sign of the azimuthal component of the interplanetary magnetic field and the SEC occurrence in the cap, By > 0 (By < 0) corresponding to peak SEC occurrence in the northern polar cap dawn (dusk) sector.
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- February 1975
- DOI:
- 10.1029/JA080i004p00696
- Bibcode:
- 1975JGR....80..696O
- Keywords:
-
- E Region;
- Interplanetary Magnetic Fields;
- Ionospheric Disturbances;
- Ionospheric Sounding;
- Magnetohydrodynamic Stability;
- Polar Caps;
- Auroral Electrojets;
- Balloon Sounding;
- Electric Fields;
- Ionograms;
- Satellite Observation;
- Geophysics;
- Particles and Fields-Magnetosphere: Plasma instabilities