Author： Khegai V. Kim V. Legen'ka A.
Publisher： MAIK Nauka/Interperiodica
ISSN： 0016-7932
Source： Geomagnetism and Aeronomy, Vol.50, Iss.6, 2010-12, pp. : 824-829
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Abstract
Morphological analysis of variations of the critical frequency foF2 in the midlatitude ionosphere at various sectors of local time is carried out on the basis of data from ground-based stations of vertical sounding of the ionosphere in the period when during use of the incoherent scatter radar at Saint-Santin an anomalously strong increase in the electric field was observed at heights of the ionospheric F region in the period of enhanced geomagnetic activity (4+ < Kp < 6−). The obtained picture of the space-time distribution of disturbances in foF2 makes it possible to assume that they could be caused by penetration to middle latitudes of the large-scale electric field of the magnetospheric convection directed westward in the nighttime and morning hours and eastward in the noon and evening sectors.
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