Comparing Activity Levels 
When you put one-month videos of the Sun from periods about 2.5 years apart, the increase in solar activity is remarkable. We took video from October, 2010 and set it next to video from May, 2013 in the 171 Angstrom wavelength of extreme ultraviolet light. The number and intensity of active regions, seen as brighter areas and numerous loops above them, increased dramatically as the Sun is approaching its maximum level of activity which is expected to occur either late 2013 or early 2014.
Search Tag(s): 171, active regions, loops
Movies
- 171sidebyside.mp4 - mp4
- 171sidebyside_best.mov - mov
- 171sidebyside_best.mpg - mpg