2 years ago
Tuesday, March 19, 2013
Solar Cycle Update: Twin Peaks? - NASA Science
Solar Cycle Update: Twin Peaks? - NASA Science: March 1, 2013: Something unexpected is happening on the sun.� 2013 is supposed to be the year of Solar Max, the peak of the 11-year sunspot cycle. Yet 2013 has arrived and solar activity is relatively low.� Sunspot numbers are well below their values in 2011, and strong solar flares have been infrequent for many months.