Fig. 3

image

Activity above Imhotep on 23 May 2015 and 23 June 2015 (UT), before and after the changes started. The local time at the nucleus differs by less than 30 min between the two images. The white arrows indicate the position where we would expect an increase in activity if jets were emitted from features A or B. The images were acquired with the NAC, more than 50° away from nadir.

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