Details of the QSEB with dipole magnetic topology in Region 1, at the instance of maximum wing enhancement in the wings of the Hβ line. The top row shows the QSEB in Hβ −0.6 Å, the B_LOS map with contours at 2σ above the noise level, and SJIs 2796 and 1400. SJIs 2796 and 1400 are at a different time, as the UV brightening begins before the QSEB. The yellow contour in panel (d) shows a region with > 5σ intensity in SJI 1400. The dashed pink box in panel (b) encloses the area considered to calculate the magnetic flux and magnetic energy shown in Fig. 5. Panel (e) shows the normalised intensity in Hβ at the blue cross in the Hβ −0.6 Å image shown in panel (a). Panel (f) shows the λt diagram for the blue marker over the QSEB. The position of this marker has been adjusted a few times to follow the strongest EB spectra for each timestep. The vertical blue markers in panels (e) and (f) denote the position of the wing of the Hβ line, the image of which is shown in panel (a). The horizontal blue marker in panel (f) denotes the time of the snapshot shown in this figure. An animation of this figure, which shows the evolution of both the QSEB events discussed in Sect. 4.1, is available in the online material.