These 2 sunspot groups grew rapidly in the Suns southern hemisphere from the week beginning 12th august. NASA was concerned and issued a warning of a 30% chance of M-class flares from these. Sure enough on the morning of 12th august AR11817 erupted with a M1.5 class flare. Unfortunately I didn't have clear skies as it went off, however later that afternoon I managed a single shot from between the clouds, the region had subsided somewhat but there was still signs of magnetic loops of plasma from the footprint sunspots.
This image was taken with the 100mm PST mod at 2000mm focal length using a DMK31 camera.