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SPECIAL COVERAGE: Living With Wildfires: San Diego Firestorm 10 Years Later

Scientists Watching Closely As Solar Flare Approaches Earth

February 17, 2011 4:06 p.m.

The largest solar flare in four years erupted Monday, and its radiation is expected to reach Earth tonight. The impact could interfere with communication systems, power grids and navigation satellites.

Related Story: Scientists Watching Closely As Solar Flare Approaches Earth