Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2748

Full Length Research Paper

Total electron content response to two moderate geomagnetic storms in July 2003 at Niamey Station in Niger

Zoundi Christian
  • Zoundi Christian
  • Laboratoire de Recherche en Energétique et Météorologie de l’Espace (LAREME), Université Norbert Zongo, Koudougou, Burkina Faso.
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Dama Stéphane
  • Dama Stéphane
  • Laboratoire de Recherche en Energétique et Météorologie de l’Espace (LAREME), Université Norbert Zongo, Koudougou, Burkina Faso.
  • Google Scholar
Kadidia Nonlo Drabo
  • Kadidia Nonlo Drabo
  • Centre National de la Recherche Scientifique et Technologique, Institut de Recherche en Sciences Appliquées et Technologies, 03 BP 7047 Ouagadougou 03, Burkina Faso.
  • Google Scholar
Ouattara Frédéric
  • Ouattara Frédéric
  • Laboratoire de Recherche en Energétique et Météorologie de l’Espace (LAREME), Université Norbert Zongo, Koudougou, Burkina Faso.
  • Google Scholar


  •  Received: 02 September 2021
  •  Accepted: 30 October 2021
  •  Published: 31 October 2021

Abstract

The present paper reviews CODG TEC response to the moderate storm of July 26, 2003 and that of July 29 at Niamey station in West African equatorial station (Geo Lat 13° 28'45.3 "N; Geo long: 02° 10'59.5" E) in Niger. These two moderate geomagnetic storms are of solar wind origin. The study showed an increase in CODG TEC values during the initial phase of the storm and a decrease in CODG TEC values during the main and recovery phases of the storm. In general, in the equatorial region, positive and negative storms occurred (increase and decrease in TEC values). Here we highlight the prereversal enhancement (PRE), a particularity of the equatorial ionosphere. Our investigations show M, B and R profiles in addition to the well-known dome profile in the variation of the CODG TEC in Niamey. This work suggests a variation of the equatorial electrojet intensity during the storm recovery phase, the appearance of the counter-electrojet as well as a disturbance of the ExB drift. This study is local, in the equatorial region in the West African sector. Data are needed to corroborate some hypotheses such as changes in profiles associated with the presence or absence of electrojet and counter-electrojet currents. We advocate for a new IHY for Africa and for data exchange between researchers.

Key words: Ionosphere, solar wind, disturbance, total electron content (TEC).