Emergence event v10. Left: continuum image with contours of transverse magnetic field in green (>180 G) and yellow, blue and red contours as in Fig. 2. A region showing the emergence of a loop is outlined with a white box. Right: corresponding time slices of the magnetic loop emergence. Background image displays the longitudinal field with positive/negative polarities in white/black. Superimposed in green is the transverse field. Reference lines in purple mark the footpoint separation. Time in this panel is counted from the start of the first footpoint emergence, i.e., 698 s after the start of the series. The corresponding sequence from where the left panel is extracted can be found in a movie (v10) in the online edition.