TY - JOUR A1 - Lakshmi, D. R. A1 - Veenadhari, B. A1 - Dabas, R. S. A1 - Reddy, B. M. T1 - Sudden post-midnight decrease in equatorial F-region electron densities associated with severe magnetic storms JO - Ann. Geophys. J1 - ANGEO VL - 15 IS - 3 SP - 306 EP - 313 Y1 - 1999/11/30 PB - Copernicus Publications SN - 1432-0576 UR - http://www.ann-geophys.net/15/306/1997/ L1 - http://www.ann-geophys.net/15/306/1997/angeo-15-306-1997.pdf DO - 10.1007/s00585-997-0306-9 ER -