Equatorial ionization anomaly and thermospheric meridional winds during two major storms over Brazilian low latitudes

► The equatorial ionosphere responses to two intense magnetic storms are investigated. ► The equatorial anomaly disturbed features, disturbed electric field and meridional winds at different storms phases are studied. ► The results show an unusual early morning development of the EIA during both the magnetic storms. ► Disturbed wind dynamo electric field produces significant modification in the F region. ► Significant oscillations in the meridional wind towards the end of the intense magnetic activity.