Overview of the event. Panel a depicts the relative position of the two spacecraft, SDO and Solar Orbiter, whose data are used in this study. Panel b shows the loop under study in the HRI_EUV image, and panels c and d show the same loop, but as seen in the AIA 171 Å and 193 Å channels, respectively. The cyan lines highlight the locations of the artificial slits that are used to generate space-time maps (shown in Figs. 2, 3, 7 and B.1). The arrow in the center of each slit indicates the direction of increasing distance along the slit. The images in panels b–d are unsharp-masked for an improved visibility of the loop. A movie is available online.