Solar energy may soon eclipse nuclear power — only not in the way we hoped. According to NASA, the planet will soon face an outbreak of powerful solar flares capable of collapsing global power grids. Were this to happen, the world's reactors could be left to run wild, overheat, melt down, and explode. As this is being written, the strongest solar storm in six years is barreling toward the Earth at 4 million miles per hour.
The sun's magnetic cycle peaks every 22 years while sunspot activity crests every 11 years. Both events are set to peak in 2013. Coronal Mass Ejections (CMEs) trigger geomagnetic disturbances (GMDs) — tides of high-energy particles that can disrupt power lines. Since the 1970s, the array of high-voltage transmission lines spanning the US has grown tenfold. NASA warns these interconnected networks can be energized by a solar flare, causing "an avalanche of blackouts carried across continents [that] … could last for weeks to months." A National Academy of Sciences report estimates a "century-class" solar storm could cause 20 times the damage as Hurricane Katrina while "full recovery could take four to ten years."
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http://www.commondreams.org/view/2012/03/08-7