NASA says our sun is preparing for a stormy period and, according to the National Academy of Sciences, "A major solar storm could cause twenty times more economic damage than Hurricane Katrina." A staff article from The Christian Science Monitor warns that, "The sun is about to get a lot more active, which could have ill effects on Earth. So to prepare, top sun scientists met Tuesday to discuss the best ways to protect Earth's satellites and other vital systems from the coming solar storms. Solar storms occur when sunspots on our star erupt and spew out flumes of charged particles that can damage power systems. The sun's activity typically follows an 11-year cycle, and it looks to be coming out of a slump and gearing up for an active period."