Examples of atypical loop evolution events. Panel a presents the HRI_EUV image, with two sets of yellow and green lines outlining the locations of the artificial slits that were used to derive the space-time (x-t) maps shown in panels a.1–a.4. The white, blue, and green arrows in these x-t maps mark the times when split-drift-type events are observed. The three loop structures where these events occur are marked with arrows in panel a. Panels b and c present the co-temporal images recorded in the AIA 171 Å and 193 Å passbands, while the x-t maps derived using these data are shown in panels b.1–c.6. The white, blue, and green arrows on these x-t maps mark the identical timestamps of their HRI_EUV counterparts. In b.4–b.6, the green arrow indicates the only event captured by S${}_{171}^3$. The other two events on this map, marked by the blue arrows, are only recorded in the S${}_{\mathrm{HRI}}^3$ map in a.3. The double-sided arrows in the x-t maps outline the drift separation distance as judged visually. To highlight the loop structures, the context images in panels a, b, and c were created by applying a one-minute running average to the respective datasets. Event movies are available online.