Overview of pores observed at CO 4.6 μm continuum, HMI continuum, CO 3–2 R14 line center, and AIA 1700 Å. The upper (a–d) and lower (e–h) panels were observed on September 8 and 11, 2018, respectively. The white contours indicate the enhanced absorption features (pores) in HMI continuum intensity images. The colored dots in panels a and e give the positions of the CO spectral lines shown in Figs. 2a,b.