AR11519 and AR11520 have nearly merged and created AR11521.
11520 is large and compact region with a main penumbra spanning almost 8 degrees longtitudinally and 5 degrees latitudinally. The central of the main penumbra has a magnetic delta structure.
11519 is decaying slowly, 11521 is growing since it was first observed on the 8th, with it growing there is a chance of at least C class flares.