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The ionospheric response to high-intensity long duration continuous AE activity (HILDCAA) event (13--15 April 2005) over mid-latitude African region


AuthorMatamba, Tshimangadzo; Habarulema, John;
KeywordsCIR; HILDCAA; Ionospheric storm; PPEF; TEC; TIDs
AbstractThe ionospheric responses to High-Intensity Long Duration Continuous Auroral Electrojet Activity (HILDCAA) event which happened following the CIR-driven storm were studied over the southern hemisphere mid-latitude in the African sector. The 13–15 April 2005 event was analysed to understand some of the mechanisms responsible for the ionospheric changes during HILDCAA event. The ionosonde critical frequency of F2 layer (foF2) and Global Navigation Satellite System (GNSS) Total Electron Content (TEC) were used to analyse the ionospheric responses. The daytime increase in foF2 and TEC values were observed on 13 April 2005. The TEC and foF2 enhancement could be attributed to Large Scale Traveling Ionospheric Disturbances (LSTIDs), increase in thermospheric neutral composition changes, Prompt Penetration Electric Field (PPEF) and an expansion of Equatorial Ionization Anomaly (EIA) to the mid-latitude.
Year of Publication2021
JournalAdvances in Space Research
Volume67
Number of Pages777-787
Section
Date Publishedjan
ISBN
URLhttps://www.sciencedirect.com/science/article/pii/S0273117720307626
DOI10.1016/j.asr.2020.10.034