Selected composite images from SDO/AIA and HMI observations for AR 11158. Left: composite of 1600 Å (gray), HMI magnetogram (red/negative, blue/positive), and 304 Å (orange) showing the cool filament material (dark lane) above the cPIL. Right: composite of 1600 Å HMI magnetogram and 131 Å (green) showing plasma emission in 10 MK. In panel (d) a clear sigmoidal structure is seen above the cPIL (traced with a dotted line) signifying a preexisting MFR. An animation is available. The video begins on 2011-03-12T00:00:08 and ends on 2011-02-15T23:43:08. The duration is 23 s.

(An animation of this figure is available.)

The video/animation of this figure is available in the online journal.