SOLAR QUIET DAILY IONOSPHERIC VARIATIONS IN THE AFRICAN REGION: A CASE STUDY OF ADDIS ABABA
Solar quiet daily (Sq) ionospheric variations have been studied using Addis Ababa (AAB) station. Addis Ababa station is located in the east African region. The geomagnetic data in the geomagnetic components:-horizontal. H; declinational D and vertical Z was used for this study. The hourly variations of the Sq variations in these geomagnetic elements were studied. The study shows that the variations of Sq in the geomagnetic elements were a dusk to dawn phenomenon and non zero variation was observed in the night. More variability were seen for the element D. the variation in the D element is seen to display the directional changes in the magnetic field as the earth’s rotate around the sun. An enhancement in Sq (H) variations in Addis Ababa was observed. The observed enhancement in Sq (H) variations is the Addis Ababa station which is attributed the enhanced dynamo action due to the influence of equatorial electro jet (EEJ) current system.