HRI_EUV slice plots of the vertical (top) and horizontal (bottom) slices shown in Figs. 2 and 3. The green triangles are located on the bulk of bright EUV bundles; the orange triangles are located on dark regions that can be traced back to EUV bundles in the HRI_EUV image; the cyan triangle is located on the bulk of a dark region that cannot be traced back to any EUV bundle in the HRI_EUV image.