Weak Solar Activity Puzzles Scientists

July 17, 2015 10:12 PM
This program will begin at
This program has ended and is being processed for playback.

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.