Articles | Volume 20, issue 7
Ann. Geophys., 20, 1007–1021, 2002

Special issue: SPACE WEATHER

Ann. Geophys., 20, 1007–1021, 2002

  31 Jul 2002

31 Jul 2002

Daytime electron density at the F1-region in Europe during geomagnetic storms

D. Buresova1, J. Lastovicka1, D. Altadill2, and G. Miro3 D. Buresova et al.
  • 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 (

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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