Maps of CM parameters for the inverted Hα contrast profiles corresponding to Fig. 1, i.e., source function S, Doppler width Δλ_D, optical thickness τ₀, and LOS velocity v_LOS (top-left to bottom-right). Light gray areas indicate regions, where the CM inversions did not deliver good fits. The two white vertical lines in the upper-left panel enclose the ROI, which was selected to show the evolution of the AFS in Fig. 13. The FOV is the same as shown in Fig. 1.