The Global positioning system derived TEC provides the information about the variations of the ionosphere during quiet as well as geomagnetically disturbed conditions. In the present study we have analyzed the GPS-TEC data for three Indian GPS stations (covering the region from magnetic equator to 20º N magnetic latitude) for the Space weather disturb week of November 2004. The suppression in the low latitude Total Electron Content on November 8 and November 10 can be attributed to the disturbance dynamo electric field whereas the anomalous enhancement in low latitude TEC on November 9 is the result of prompt penetration electric field. Observation of TEC enhancement on November 11, after ~48 hours of southward turning of the Interplanetary magnetic field (IMF Bz) on November 9, 2004 indicate a positive phase of geomagnetic storm. Some new results on the effect of prompt penetration and disturbance dynamo electric field on the ionospheric TEC would be presented and discussed during the workshop.