Dazzling Duo 
As SDO observed in extreme ultraviolet light, a pair of active regions put on quite a show over a three-day period (Feb. 7-10, 2011). The magnetic field lines above the regions produced fluttering arcs waving above them as well as a couple of flares. Another pair of smaller active regions emerges and trails behind the larger ones.
Search Tag(s): 171, active regions, loops
Movies
- Active171_Feb_best.mov - mov
- Active171_Feb_small.mov - mov
- Active171_Feb_512vs.mpg - mpeg