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We examine Cluster observations of a reconnection event atxGSM=−15.7 RE in the magnetotail on 11 October 2001,when Cluster recorded the current sheet for an extended periodincluding the entire duration of the reconnection event. The onsetof reconnection is associated with a sudden orientation change ofthe ambient magnetic field, which is also observed simultaneously byGoes-8 at geostationary orbit. Current sheet oscillations areobserved both before reconnection and during it. The speed of theflapping motions is found to increase when the current sheetundergoes the transition from quiet to active state, as suggested byan earlier statistical result and now confirmed within one singleevent. Within the diffusion region both the tailward and earthwardparts of the quadrupolar magnetic Hall structure are recorded as anx-line passes Cluster. We report the first observations of the Hallstructure conforming to the kinks in the current sheet. This resultsin relatively strong fluctuations in Bz, which are shown to bethe Hall signature tilted in the yz plane with the current sheet

Global and local disturbances in the magnetotail during reconnection