Left panel: STIX contours overlaid on EUVI/STEREO-A 195 Å. The contours (50%, 65%, 80%, and 95% of the maximum value in each image) in orange and light orange, respectively, show the X-ray sources in 6–10 and 10–18 keV. The background is EUVI/STEREO-A 195 Å filter rotated to Solar Orbiter’s point of view. The time for the image in X-rays is at 14:23:13 UT (with the time shift of 43.7 s with respect to the Solar Orbiter time) in the Earth time frame with the integration time of 120 seconds. The time of EUVI is at 14:22:30 UT. Right panel: Evolution of the X-ray sources in the 6–10 and 10–18 keV energy range and of the extreme ultraviolet images in 195 Å. The times for the X-ray images correspond to the time of the black (or white) long dashed lines in Fig. 3. (b) The time of X-ray is at 14:15:13 UT, EUVI is at 14:15 UT. The corresponding time in Fig. 3 is T₁. (c) The time of X-ray is at 14:25:13 UT, EUVI is at 14:25 UT. The corresponding time in Fig. 3 is T₃. (d) The time of X-ray is at 14:31:13 UT, EUVI is at 14:32:30 UT. The corresponding time in Fig. 3 is T₄. (e) The time of X-ray is at 14:35:13 UT, EUVI is at 14:35 UT. The corresponding time in Fig. 3 is T₅.