Soft X-ray flux. The time series shows the disk-integrated soft X-ray flux detected by the 1–8 Å band of GOES on 2022 March 17 between UT 03:00 and UT 04:00. The vertical solid line marks the start time of EUI observations (corrected for the time delay between Earth and Solar Orbiter; see Table 1 for details). The vertical dashed lines mark the duration covered by the panels in Fig. A.3. See Appendix A for a discussion.