Irregularities in the African ionosphere associated with total electron content anomalies observed during high solar activity levels

In this paper, we investigate anomalies in total electron content (TEC) from 7 stations of the Africa Geodetic Reference Frame (AFREF) during initial and recovery stages geomagnetic storm 19 February 2014. Additionally, study storms under solar activity ascending period March 2012 low May 2017 to emphasize scintillation effects, especially nighttime. We employ a 15-days median-average sliding window latitudinal patterns relative TEC (rTEC) determine ionospheric irregularities using rate index (ROTI). The low-latitude show larger rTEC variations than midlatitude stations. ROTI strength >1 TECU/min is found at latitude postsunset <1 mid latitudes daytime. results that differences between may be caused by dynamo electric field originating energy input disturbances. observed significant intensity established are more pronounced stages.