Solar activity has increased over the last few days, as one of the largest Sunspots AR2396 in the recent months is visible on the Solar limb that is facing towards the Earth. In just one day its surface increased by 50%. The growing sunspot group stretches more than 150,000 km from end to end. All by itself, the primary dark core is more than three times the size of Earth and can be observed even by naked eye using the adequate protection. View of the Sunspot and its surrounding in H-alpha light:
Short animation of the ever changing solar prominence. It consists of 38 frames at frame-rate of 15 fps. Still frames were acquired from 11:10 to 11:50 UT. Every still frame is registered and processed imaged, made out of 45 seconds long video. Seeing conditions were very poor.