Structure of the subauroral ionosphere during a magnetospheric storm according to Intercosmos-19 data

Computer Science – Sound

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Auroral Zones, Ionospheric Ion Density, Ionospheric Sounding, Magnetic Storms, Magnetospheric Instability, Satellite Sounding, Diurnal Variations, Intercosmos Satellites

Scientific paper

Intercosmos-19 data are used to investigate variations of electron density and temperature in the subauroral ionosphere during the main phase of the magnetospheric storm of April 3-4, 1979. It is shown that the most drastic shift of the midlatitude trough toward the equator is connected with the reversal of the Bz component of the IMF toward the south. The total amplitude of the trough shift is 18, 20, and 17 deg for daytime, evening, and near-midnight hours, respectively. It is also found that the daytime midlatitude trough can disappear temporarily in the main storm phase owing to the reversal of the electric field at midlatitudes.

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