Development of a dust jet emanating from the Imhotep region (indicated by the arrow) on the night side of the comet. The left image was taken in the UV-375 nm filter on 12 March 2015 at 7:11:20 UTC before the outburst, the second image from the left shows the first appearance of the new jet at 7:13:08 (UV-375 nm), and images 3 and 4 were acquired at 7:15:08 and 7:16:09 in the UV-375 nm and VIS-610 nm filters, respectively. A logarithmic scaling was applied to enhance the visibility of the faint structures. The projected Sun direction is upwards and the FOV is 16.4 × 16.4 km. The broad bright feature in the right part of the images is an artefact due to the primary ghost of the WAC.