SOLAR ARCHIPELAGO: Sunspots are magnetic islands on the sun. Sunspot AR1520 is a complete archipelago. Scroll down to scan more than 200,000 miles of island chain:

Amateur astronomer Alan Friedman took the picture on July 10th from his backyard observatory in Buffalo, New York. “AR1520 is a tremendous archipelago and a wonderful target for backyard solar telescopes,” he says.

The tangled magnetic canopy of the sunspot group, shown here in an extreme UV image from NASA’s Solar Dynamics Observatory, harbors energy for strong solar flares. NOAA forecasters estimate an 80% chance of M-class flares and a 15% chance of X-class flares during the next 24 hours.

from:    spaceweather.com