Images and light curves of Sgr A* observed on 2024 April 6. Panel (A) at the top shows 8.1 μm residual images after subtracting a constant image shown by the gray contour lines. Each image shows ~20 minutes of averaged data before (left), during (middle), and after (right) the flare. North is up, and east is to the left. Panels (B) show light curves of Sgr A* at 1.3 mm (top left and right duplicated) and the four MIRI spectral channels with wavelengths as labeled. Flux densities are as observed, i.e., calibrated but with no extinction correction. t = 0 marks the beginning of the flare as we define it, and all times have been corrected to the barycentric reference frame. Panel (C) shows normalized light curves of the four MIRI bands to demonstrate the change in spectral index.