X-T analysis using the EUI image sequence. Panel a: a context image from EUI with the two artificial slits (white boxes) overplotted. Panel b: X-T map from Slit 1. A zoomed-in view of the first 5 min of this map is shown separately as panel c. The X-T map from Slit 2 is shown in panel d. Dotted lines in green trace the slanted ridges in the corresponding X-T maps and the speeds, derived from the slopes of two of these lines, are printed next to those lines. The red box in i marks the location at which the light curve was extracted for the wavelet analysis in Fig. 6. See Sect. 3.3.2 for a detailed discussion.