ARLA/CLUSTER: Algo inesperado está acontecendo no Sol

[João Gonçalves Costa]

NASA Solar Cycle update: Twin Peaks?

NASA report that 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.

The quiet has led some observers to wonder if forecasters missed the mark. Solar physicist Dean Pesnell of the Goddard Space Flight Center has a different explanation:

"This is solar maximum," he suggests. "But it looks different from what we expected because it is double peaked."

Watch this NASA video
http://www.youtube.com/embed/oDYUH9QqtwY?rel=0


Read the full story at
http://science.nasa.gov/science-news/science-at-nasa/2013/01mar_twinpeaks/


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