Snapshot of images and spectra of QSEB – 3 at the instance of maximum emission in the wings of the Hβ line, with the same format as Fig. 7. The QSEB is located at y = 191 (in IRIS pixels) at t = 08 : 26 : 06 UT. Panel e) shows the normalized intensity of the Hβ line. The spectral profiles of Mg II k 2796.39 Å, Mg II triplet 2798.8 Å and Si IV 1394 Å are shown for the region covered by the slit at the site of QSEB and are in units of DN s⁻¹.