Active pits detected in the Seth region of Comet 67P/Churyumov-Gerasimenko can be seen in the lower right portion of this OSIRIS wide-angle camera image. The largest, Seth_01, measures 220 m across and 185 m deep. Seth_02 and Seth_03 lie immediately to the left and measure 110 m and 140 m across, respectively.
The contrast of the image has been deliberately stretched to reveal the details of the fine-structured jets against the shadow of the pit, which are interpreted as dusty streams rising from the fractured wall of the pit.
The image was acquired on 20 October 2014 from a distance of 7 km from the surface of the comet.
Full story: Comet sinkholes generate jets