Disturbance dynamo, prompt penetration electric field and overshielding in the Earth's ionosphere during geomagnetic storm

► This study presents the ionospheric effects of DDEF, PPEF and overshielding. ► Dynamo electric field, DDEF and PPEF lead to the EIA intensification. ► The DDEF leads to increase in Te during storm recovery phase. ► DDEF leads to more pronounce additional layers over F2 peak at equatorial latitudes. ► PPEF and overshielding occur in active and recovery phases of storm, respectively.