solar flares

See the following -

A 2012 Solar Storm Almost Caused A Worldwide Catastrophe

Kevin Loria | Business Insider | July 25, 2014

The world as we know it almost came to an end in 2012 — though it happened before the Mayan calendar came to an end. Instead, one of the strongest solar storms ever recorded sent a burst of energy through Earth's orbit that could have crippled electrical systems across the planet...

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Get Ready For Some Really Bad Space Weather

Bob Brewin | Nextgov | September 21, 2012

That’s the message from four space scientists at the John Hopkins University Applied Physics Laboratory who warned of increased solar activity -- which can disrupt all types of communications, including GPS signals -- with the sun pumping out more solar flares over the next five years than any time since 2003. Read More »