Geomagnetic storm main phase effect on the equatorial ionosphere over Ile–Ife as measured from GPS observations

• DOI: 10.1016/j.sciaf.2020.e00472
• Publication Date: 2020-07-10T06:11:55Z
• Authors: Ayomide O. Olabode; Emmanuel A. Ariyibi
• Keywords: Interplanetary scintillation; Space Weather

The effect of the main phase two intense geomagnetic storm events which occurred on August 6 and September 26, 2011 equatorial ionosphere have been investigated using Global Positioning System (GPS) data obtained from an Ile–Ife station (geomagnetic lat. 9.84 ∘N, long. 77.25 ∘E, dip 7.50∘). Total Electron Content (TEC) profiles during geomagnetically disturbed days were compared with quiet time average to examine response ionosphere. results showed that intensity both at night-time correlated well a strong southward direction z-component Interplanetary Magnetic Field (IMF-Bz) Solar Wind Speed (Vsw), Disturbance (Dst) profile showing multiple step development. TEC depletion was observed 6, event recording maximum value 9.31 TECU. A 55.8 TECU recorded depicting enhancement. Significant scintillation index 0.57 when started followed by prolonged suppression while there less significant impact 0.33. present study show rapid energy input solar wind large variations in phenomenon over Ile–Ife, Nigeria.