Results of DEM inversion to the AR. Panels a–d display the EM maps of the AR at 23:15:14 UT within four different temperature bins. The small boxes (labeled R1–R4) are the same as in Fig. 8. Panels e and f plot the DEM distributions of a selected late-phase loop region (plus sign in the loop delineated by the dashed line) during the pre-event period and at the corresponding AIA 131 Å peak, respectively.