Zoom into the diffuse region in different spectral bands. The individual panels represent (a) the rastered line-of-sight magnetogram from HMI, as in Figs. 2b and c, (b) the Si IV 1394 Å emission line intensity from IRIS, as in Figs. 2a and c, (c) the O IV 1401 Å emission line intensity from IRIS, and (d)–(h) observations from AIA in different channels indicated in each panel. Panels b and c are plotted in logarithmic scale. Like in Fig. 2, black and white contours outline the magnetic field at values of −30 G and +30 G, respectively. The red contours outline the brightenings in the Si I Lyman continuum. The green arrow in panel f points to the diffuse region we studied. The blue arrows in panels g and h point to a region with hotter plasma. See Sect. 3.3.