Details of the EB-like feature for the last four samples in Fig. 1, ordered top to bottom. For each sample time, the first column shows a quartet of synthetic intensity images in the H_α wing at Δλ = −0.11 nm from line centre at viewing angle θ = 49° (μ = 0.66), from four different azimuthal viewing directions φ as specified. The intensity is normalized to the mean continuum intensity over the whole field of view. The second column shows corresponding synthetic H_α Dopplergrams obtained by subtracting normalized blue-wing intensity from red-wing intensity at Δλ = ± 0.11 nm. The third column shows corresponding synthetic magnetograms obtained from the Fe I 6301 Å line at Δλ = −48 mÅ from line centre. The values indicate the amount of normalized circular polarization.