Importance of IMF-By in the Evening to Nighttime Electrodynamics of Equatorial Ionosphere During Disturbed Times

Debrup Hui, Ghani Khan Choudhury Institute of Engineering and Technology, Malda, India, Geeta Vichare, Indian Institute of Geomagnetism, Navi Mumbai, India and Dibyendu Chakrabarty, Physical Research Laboratory, Ahmedabad, India