Comparing an observation with the AIA 94 Å filter (left) and a photospheric map of the squashing factor Q from our simulations (right). The Q map is from 06 September 09:24 UT, while the time of the AIA observation was 06 September 08:59 UT because the observations were saturated closer to 09:24 UT due to the onset of the X2.2 flare at 08:57 UT. Also shown are the key field lines, consistent with Fig. 8 with minor footpoint adjustments due to time. The field lines are from 06 September 09:24 in both panels.