Top panels: red wing emission (λ_Hα+ 1.5 Å) in the Hα line at 11:55:50 UT (flaring event 1) with the locations of (a) kernel 1 (seismic source 1) and kernel 2 (seismic source 2), shown by the red and blue circles, respectively, and the location of (b) kernel 3 (flaring event 2), marked by the green circle, observed at 12:06:48 UT. Bottom panels (c) Hα line profiles in kernel 1 (red line) and kernel 2 (blue line) and (d) kernel 3 (green line) obtained with SST (arbitrary units) by taking the average over the pixels. The HXR contours obtained at 12:08:26 UT are over-plotted for the 25–50 keV channel with the contours at 0.25 of maximal intensity (white), 0.48 (light brown), 0.7 (medium brown), and 0.9 (dark brown).