Solar storm could cause 20 times more damage than Katrina

The sun let loose its most powerful eruption in more than four years Monday night (Feb. 14), disrupting radio communications in China and generating concern around the world. But it could have been a lot worse, experts say.
Despite its strength, Monday's solar storm was a baby compared to several previous blasts, and it provides just a hint of what the sun is capable of. A true monster storm has the potential to wreak havoc on a global scale, knocking out communications systems, endangering satellites and astronauts and causing perhaps trillions of dollars in damages.

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Solar storm could cause 20 times more damage than Katrina