Abstract
It is a famous observational fact that at the geomagnetic storm there is a generation of the equatorial current. Some people undertake to clear up its cause theoretically, but its clarification has not yet been done. The impact of the plasma flow from the sun on the magnetic cavity causes the charged particles to be stored in the dawn and dusk meridian plane by a frictional interaction between the enhanced plasma flow and magnetic field lines, so the electric field is induced. In this paper, the generation of the equatorial current is tried to clear up with this electric field and the geomagnetic field.
