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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 23, issue 9
Ann. Geophys., 23, 3027–3034, 2005
https://doi.org/10.5194/angeo-23-3027-2005
© Author(s) 2005. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: 1st European Space Weather Week (ESWW)

Ann. Geophys., 23, 3027–3034, 2005
https://doi.org/10.5194/angeo-23-3027-2005
© Author(s) 2005. This work is distributed under
the Creative Commons Attribution 3.0 License.

  22 Nov 2005

22 Nov 2005

November 2003 event: effects on the Earth's ionosphere observed from ground-based ionosonde and GPS data

E. Blanch1, D. Altadill1, J. Boška2, D. Burešová2, and M. Hernández-Pajares3 E. Blanch et al.
  • 1Observatori de l’Ebre, URL – CSIC, Roquetes, Spain
  • 2Institute of Atmospheric Physics, Academy of Sciences CR, Prague, Czech Republic
  • 3Technical University of Catalonia, UPC/gAGE, Barcelona, Spain

Abstract. Intense late-cycle solar activity during October and November 2003 produced two strong geomagnetic storms: 28 October-5 November 2003 (October) and 19-23 November 2003 (November); both reached intense geomagnetic activity levels, Kp=9, and Kp=8+, respectively. The October 2003 geomagnetic storm was stronger, but the effects on the Earth's ionosphere in the mid-latitude European sector were more important during the November 2003 storm. The aim of this paper is to discuss two significant effects observed on the ionosphere over the mid-latitude European sector produced by the November 2003 geomagnetic storm, using data from ground ionosonde at Chilton (51.5° N; 359.4° E), Pruhonice (50.0° N; 14.6° E) and El Arenosillo (37.1° N; 353.3° E), jointly with GPS data. These effects are the presence of well developed anomalous storm Es layers observed at latitudes as low as 37° N and the presence of two thin belts: one having enhanced electron content and other, depressed electron content. Both reside over the mid-latitude European evening sector.

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