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                     Weak Solar Activity Puzzles Scientists

   by George Putic

   At almost regular intervals, our sun displays phenomena benignly called
   "sunspots." Actually, they are violent storms. Space scientists closely
   observe this activity because it may have adverse effects on
   communications, navigation and even power grids. But the diminishing
   intensity of the last two solar cycles leaves them puzzled. VOA's
   George Putic reports.
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   [1]http://www.voanews.com/media/video/weak-solar-activity-puzzles-scien
   tists/2867471.html

References

   1. http://www.voanews.com/media/video/weak-solar-activity-puzzles-scientists/2867471.html