Images of the solar disc as recorded through the AIA 171 Å passband and the HMI-LOS are shown in panel a and panel b, respectively. The black rectangle in each panel outlines the region of interest (ROI) that encompasses the loop system studied in this paper. Panels a.1 and b.1 provide additional images of the ROI for the AIA and HMI data, respectively. In panel c, the cyan and red contours, representing the boundaries of ±40 G as derived from panel b.1, are overlaid on the AIA image from panel a.1.