A lovely session with the Sun today, both in H-alpha and in white-light. Two large and very active sunspot groups are still visible, one of which (named 2644) released a small eruption just as I was acquiring images.
Equipment: TS 115mm F/7 Refractor, Quark H-alpha filter, ASI 174MM, 700/2500 frames. Seeing 6/10.
A comparison of the white light view and the H-alpha one:
A short animation spanning 27 minutes, showing the evolution of the small eruption and the plasma traveling along the magnetic field lines:
A filmstrip from the above animation:
And an image of AR 2645, the largest of the two sunspot groups visible on the Sun these days: