Abstract

AbstractAn abnormal anti‐sunward intense flow of plasma convection is observed by EISCAT radar in the high latitude ionosphere near the polar cap boundary. It occurred in the morning sector of MLT under conditions of southward IMF Bz during the recovery phase of a moderate magnetic storm. A synthetic analysis of radar data and in‐situ satellite observations is made in combination with a tracing of magnetic field lines by means of a magnetospheric field model on this event. It is evident that the abnormally reversed westward high flow of plasma convection, the plasma structure and properties are probably the ionospheric signatures of magnetic reconnection taking place during the dayside magnetopause.

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