Intensity profiles for the SOL2017-04-23 flare. Gray-shaded areas represent time intervals during which an ALMA image was obtained. Black curves show intensities spatially averaged over the flare region, and red curves show peak intensities within the flare region. The scale of the red curves is given on the right axis in the same units as the black curves given on the left axis. Vertical blue lines denote instants that are shown in cutout images and were further analyzed. The same representation is used in all subsequent intensity profiles.