a) Part of the source area imaged during the close flyby of 67P on March 28, 2015, at a distance of ~20 km. The image covers an area roughly outlined by the dashed white line in Fig. 7, and the trails of possible sources of sunset jets are displayed as in Fig. 7. The honeycomb features are highlighted in the dashed white circles and numbered. b) Enlarged view of the area outlined by the solid white line in a), showing one of the honeycomb structures. c) Contrast-stretched view of b) showing possible dust emission from the honeycomb feature against dark background.