A long solar filament that erupted Dec. 6, 2010. The STEREO satellite on the far side of the sun from Earth captured this image in extreme ultraviolet light. The filament was almost a million kilometers long.

Researchers seeking to improve space weather forecasting need detailed information on the impact of previous space weather events on aircraft, power grid and satellite operators, according to a panel of experts speaking at the virtual American Geophysical Union fall meeting.

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Debra Werner is a correspondent for SpaceNews based in San Francisco. Debra earned a bachelor’s degree in communications from the University of California, Berkeley, and a master’s degree in Journalism from Northwestern University. She is a recipient...