Coronal dimming on the south side of pre-eruption F2. (a1)–(a3): Sequence of AIA 193 Å images showing the appearance of coronal dimming on the south side of F2 before its eruption. The red and blue curves are contours of the HMI LOS magnetograms at ±50 G. The white curves outline the border of the dimming region around 00:10 UT on November 16. (b1)–(c3): Corresponding total EM and DEM-weighted average temperature maps exhibiting the evolution of plasma density and temperature in the dimming region. An associated animation of 193 Å images, covering 23:10 UT on November 15 to 00:10 UT on November 16, is available online.