Event overview. Panel a: GOES/XRS and STIX X-ray light curves in multiple energy bands during the flare. Panel b: Shorter time interval, focusing on the pulsations in the STIX 15–25 keV energy band (blue). The observations are fitted by the linear combination (blue) of a series of individual Gaussians (dotted, gray). Right: Spacecraft positions during the event in heliographic stonyhurst coordinates. The position of the main flare loop arcade is marked (red start).