Stacked Hα image cutouts for data A. Before addition, all seeing-passed image cutouts are centered on the center of the RBE skeleton (plus) and rotated to point the skeleton to the right, away from the network to the left. Rows: averaged Hα samplings at Δλ = −0.8, 0.0 and 0.4 Å from mean line center. Columns: averaged samplings at different time delays with respect to each RBE track, from 4 min earlier sampling at the left to 7 min later sampling at the right. The Δλ and Δt values are specified at the top of each panel. The greyscales are shared along rows, defined by bytescaling the Δt = 0, 2, 3 min panels, respectively. Blank corners result from cutout rotations.