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Downward current electron beams observed at the dipolarization front

Fu, SuiYan; Zong, QuiGang; Pu, ZuYin +1 more

The strong field-aligned pitch angle distribution of electrons is observed right at the dipolarization front (DF) before the arriving of a high speed flow when the four Cluster satellites are traveling in the magnetotail around 15 RE on July 22, 2001. The increased electron fluxes only last for a short time period at the DF, corresponding to just …

Variation of dependence of the cusp location at different altitude on the dipole tilt

Dunlop, Malcolm; Zhang, ZiYing; Shi, JianKui +5 more

Using the Cluster cusp crossings data, dependence of the cusp location at the mid-altitude on the geomagnetic dipole tilt during northward IMF is studied. The results show that the cusp center moves 0.051° Invariant Latitude (ILAT) upon the increase of 1° in the dipole tilt angle at the average altitude of 5.8 RE (Earth radius). According to the p…