PMJ A10 and associated dark features in CRISP images in the Ca II 8542 Å line at offset −350 mÅ (left column), the H α line at an offset of −400 mÅ (middle column), and a value-inverted combination of these (right column), which is shown at indicated time offsets (time increasing top to bottom). Tick-marks are spaced 1″apart. Time t = 0 s is when the PMJ achieves maximum brightness at Ca II 8542 Å −350 mÅ (marked with a plus sign). The combined image displays (re-scaled) negatives of the two CRISP images at their respective offsets, with bright red indicating dark Ca II 8542 Å −350 mÅ features and bright cyan indicating dark H α −400 mÅ features, when dark features overlap in the two channels, they combine to white in the combined image. Sample positions used for sampling profiles are indicated as follows: plus sign, Ca II 8542 Å line (bright feature); cross, Ca II 8542 Å line (dark feature); and asterisk, H α line (dark feature).