This video provided by the Solar Dynamics Observatory provides a side-by-side comparison of the Sun from precisely two years ago (left, from SOHO in 2009) to the present (right, from Solar Dynamics Observatory, showing March 27-28, 2011) which dramatically illustrates just how active the Sun has become. The comparisons shown in two similar wavelengths of extreme ultraviolet light, reveal how the Sun now sports numerous active regions that appear as lighter areas that are capable of producing solar storms. Two years ago the Sun was in an extremely quiet solar minimum. The Sun’s maximum period of activity is predicted to be around 2013, so activity will likely continue to ramp up.
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