Selected images of the DEM in the temperature ranges 1−2 × 10⁶ K (first column, maximum value 2.5 × 10²⁸ cm^-5), 2−4 × 10⁶ K (second column, maximum value 3.0 × 10²⁸ cm^-5), 4−8 × 10⁶ K (third column, maximum value 2.0 × 10²⁸ cm^-5) and above 8 × 10⁶ K (right column, maximum value 2.0 × 10²⁸ cm^-5) in the course of event B. The contrast of the display (0.6 for the first column and 0.4 for the others) was adjusted for best viewing. The top row shows HMI magnetograms (full range and saturated at ± 300 G) and a while-light image. The arrows in the 10:54:12 UT image mark the first brightenings, a, b and c in the 10:55:12 UT image mark three sets of footpoints; p in the white-light image marks a small pore. The field of view is 55 by 22′′ and the images have been rotated for easier viewing. A movie available online shows the full time sequence of DEM images (top row of movie) as well as DEM difference images (bottom row of the movie).