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Substorm onset dynamics in the magnetotail as derived from joint TC-1 and Cluster data analysis

Wang, H.; Lühr, H.; Ridley, A. J. +1 more

This study investigates two substorm onset events with favorable constellations of spacecraft, TC-1 and Cluster, separated by several Earth radii. The substorms have been identified in both auroral regions. One is believed to be triggered by a northward turning of the interplanetary magnetic field (IMF), while the other occurs under generally sout…