Schematic of a cancellation episode which consists of three cancellation events and transforms the part of the initial arcade shown in the first panel into a flux rope. The PIL is drawn dashed. The ratio of footpoint displacement of the sheared arcade loops to the length of the active section of the PIL (where cancellation proceeds) is 2:3. Correspondingly, 2/5 of the flux is transformed into the rope, while 3/5 cancel.
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