Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region
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 6...
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Atmospheric and Climate Sciences
2025
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| Online Access: | http://hdl.handle.net/20.500.12493/2914 |
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| author | Niwamanya, Duncan Habyarimana , Valence Jurua, Edward |
| author_facet | Niwamanya, Duncan Habyarimana , Valence Jurua, Edward |
| author_sort | Niwamanya, Duncan |
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| description | 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. |
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| id | oai:idr.kab.ac.ug:20.500.12493-2914 |
| institution | KAB-DR |
| language | English |
| publishDate | 2025 |
| publisher | Atmospheric and Climate Sciences |
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| spelling | oai:idr.kab.ac.ug:20.500.12493-29142025-06-13T00:00:26Z Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region Niwamanya, Duncan Habyarimana , Valence Jurua, Edward 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. Swedish International De- velopment Agency (SIDA) 2025-06-12T10:23:35Z 2025-06-12T10:23:35Z 2025 Article 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. 2160-0422 http://hdl.handle.net/20.500.12493/2914 en Attribution-NonCommercial-NoDerivs 3.0 United States http://creativecommons.org/licenses/by-nc-nd/3.0/us/ application/pdf Atmospheric and Climate Sciences |
| spellingShingle | Niwamanya, Duncan Habyarimana , Valence Jurua, Edward Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region |
| title | Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region |
| title_full | Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region |
| title_fullStr | Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region |
| title_full_unstemmed | Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region |
| title_short | Low Latitude Analysis of Geomagnetic Storm Effects on Ionospheric Vertical Drifts over the East African Region |
| title_sort | low latitude analysis of geomagnetic storm effects on ionospheric vertical drifts over the east african region |
| url | http://hdl.handle.net/20.500.12493/2914 |
| work_keys_str_mv | AT niwamanyaduncan lowlatitudeanalysisofgeomagneticstormeffectsonionosphericverticaldriftsovertheeastafricanregion AT habyarimanavalence lowlatitudeanalysisofgeomagneticstormeffectsonionosphericverticaldriftsovertheeastafricanregion AT juruaedward lowlatitudeanalysisofgeomagneticstormeffectsonionosphericverticaldriftsovertheeastafricanregion |