2015 August 18 Sun - AR12403

PTS

AR12403 first appeared on August 18, on the SEE limb.  It demonstrated lots of flares from the beginning.
As it turns towards the meridian, it develops into a huge group, extending more than 15 degrees in helio longitudes in the past 2 days.
Lots of flares and filaments are produced, together with some white-light flare.

Telescope: AP Starfire EDT 155 mm f/9.   
stopped to 50 mm for disc images, with 4X telecentric lens (f/36) for closeups   
filter: Solar Spectrum SO1.5/0.3A with CERF prefilter   
Camera: Imperx 4M15   
North is up, and east to the left.