Long‐duration penetration of the interplanetary electric field to the low‐latitude ionosphere during the main phase of magnetic storms

It is well known that the interplanetary electric field can penetrate to the low‐latitude ionosphere. It is generally believed that the penetration of electric fields can last only for ∼30 min because of the shielding effect in the ring current. In this paper we present the observations of the daysi... View More