Description of events. Panels a, b, and c represent the context images of the three datasets. The green boxes show examples of the selected loops for which oscillations are detected. The other loops we studied appear at different times and are not shown here. A magnified view of the loops in the green boxes for each upper panel is shown in the lower panels. The red lines in panels d–i depict the position of the artificial slits we used to generate the x − t maps. The blue crosses in each panel show the approximate position of the footpoints. Details of the dataset are provided in Table 1. An animation related to this figure is accessible online.