TITLE:
TEC Variability during Fluctuating Events at Koudougou Station during Solar Cycle 24
AUTHORS:
Tinlé Pahima, Doua Allain Gnabahou, Sibri Alphonse Sandwidi, Frédéric Ouattara
KEYWORDS:
Total Electronic Content, Fluctuating Events, Solar Cycles, Photoionization, Recombination, Positive Storms, Negative Storms
JOURNAL NAME:
International Journal of Geosciences,
Vol.13 No.10,
October
31,
2022
ABSTRACT: This paper deals with TEC variability during
fluctuating geomagnetic events (FE) during
solar cycle 24 at Koudougou station (lat: 12o15'N; Geo long: -2o20'E). The study was done by comparing TEC variations during FE days with
those of quiet days (QA). Comparison was made taking into account solar phases’
and seasons’ influences. FE’s and QA’s TEC curves are characterized by dome
profiles. All graphs show two troughs, one in the morning (0500 LT) and the
second in the evening (around 2000 LT) and a peak around 1400 LT during all
solar phases and winter months and around 1500 LT for the remaining seasons.
Both troughs are caused by the decrease of the photo ionization and an increase
of the recombination phenomena, as well for FE as for QA periods. FE cause
positive storms during all solar phases as well as during seasons and some
negative storms during spring and summer months and minimum and maximum solar
phases.