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Ann. Geophys., 20, 1007-1021, 2002
www.ann-geophys.net/20/1007/2002/
© European Geosciences Union 2002
Daytime electron density at the F1-region in Europe during geomagnetic storms
D. Buresova1, J. Lastovicka1, D. Altadill2, and G. Miro3
1Institute of Atmospheric Physics, Bocni II, 141 31 Prague 4, Czech Republic
2Observatori de l’Ebre, 43 520 Roquetes, Taragona, Spain
3INTA/CEDEA Atmospheric Sounding Station ‘El Arenosillo’, Mazagon, 21 130 Huelva, Spain
Correspondence to: D. Buresova (buresd@ufa.cas.cz)
Abstract. This study attempts to
demonstrate changes in the ionospheric F1-region daytime ionization during
geomagnetic storms. The F1-region is explored using available data from several
European middle latitude and lower latitude observatories and a set of
geomagnetic storms encompassing a range of seasons and solar activity levels.
The results of analysis suggest systematic seasonal and partly latitudinal
differences in the F1-region response to geomagnetic storm. The pattern of the
response of the F1-region at higher middle latitudes, a decrease in electron
density, does not depend on the type of response of the F2-region and on solar
activity. A brief interpretation of these findings is presented.
Key words. Ionosphere (ionospheric
disturbances; mid-latitude ionosphere)
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