Sc- and Si-Associated ULF and HF-Doppler Oscillations during the Great Magnetic Storm of February 1986

Abstract

Sc- and si-associated ionospheric Doppler velocity oscillations and geomagnetic pulsations observed during the great geomagnetic storm of February 1986 can be explained by the “dynamo-motor” mechanism of ionospheric electric fields and by global compressional oscillations in the magnetosphere and ionosphere, respectively.