Hα profiles for all pixels selected with the small green boxes in the scatter diagrams of Fig. 12 for data A (upper row) and data B (lower row). Dashed black curve: average profile over the field of view and the sequence duration. First column: profiles at the time of each darkest blue-wing sampling. Second column: profiles at the time of each darkest core sampling. Color coding: time delay between these samples on the scale of Fig. 12. The intensity units are the same as for the scatter diagrams in Fig. 12. data A: 402 pixels with 60% within the yellow-orange 2 − 5 min positive-delay range. data B: 635 pixels with 26% within 2 − 5 min delay.