Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region
| dc.contributor.author | Niwamanya, Duncan | |
| dc.contributor.author | Habyarimana , Valence | |
| dc.contributor.author | Jurua, Edward | |
| dc.date.accessioned | 2025-06-12T10:23:35Z | |
| dc.date.available | 2025-06-12T10:23:35Z | |
| dc.date.issued | 2025 | |
| dc.description.abstract | The geomagnetic storm effect on ionospheric vertical E × B drift is analysed using Communication/Navigation Outage and Forecasting System (C/NOFS) Satellite data, magnetometer data, and solar wind data, over the East African low latitude region during the period 2008-2015. We identified a total of 608 corotating interaction region (CIR)-driven and 23 coronal mass ejection (CME)-driven geomagnetic storms in this study. Most of the CIR-driven storms were observed during the declining phase of solar cycle 24 in 2015. The CME-driven storms, on the other hand, were dominant during the near maximum phase of the solar cycle 24 in 2012. The C/NOFS satellite data was found to be consistent with magnetometer observations in identifying both upward and downward vertical E × B drift occurrence. The common result of analysed CME-driven geomagnetic storms was enhancement in E × B drifts due to presence of eastward prompt penetrating electric fields (PPEFs) during the storm main phase. There was also a decrease in E × B due to the decrease in horizontal component of the magnetic field ( ΔH ) during the recovery phases of the CME-driven storms. This is a manifestation of downward E × B drifts associated with westward electric field, which is due to the disturbance dynamo contribution. During CIR-driven geomagnetic storms, the storm’s main phases were also dominated by downward E × B drifts associated with westward electric field, which is due to disturbance dynamo. | |
| dc.description.sponsorship | Swedish International De- velopment Agency (SIDA) | |
| dc.identifier.citation | Niwamanya, D., Habyarimana, V., & Jurua, E. (2025). Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Low Latitude Region. Atmospheric and Climate Sciences, 15(2), 373-390. | |
| dc.identifier.issn | 2160-0422 | |
| dc.identifier.uri | http://hdl.handle.net/20.500.12493/2914 | |
| dc.language.iso | en | |
| dc.publisher | Atmospheric and Climate Sciences | |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | en |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | |
| dc.title | Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region | |
| dc.type | Article |