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Hiss - 40-Year-Old Puzzle - Solved Saturday, March 08, 2008 - Iddo Genuth Home >> Headlines >> General Science   
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Scientists have solved a 40-year-old puzzle by identifying the origin of the intense radio waves in the Earth's upper atmosphere that control the dynamics of the Van Allen radiation belts — belts consisting of high-energy electrons that can damage satellites and spacecraft and pose a risk to astronauts performing activities outside their spacecraft. The source of these low-frequency radio waves, which are known as plasmaspheric hiss, turns out to be electromagnetic wave type called "chorus". (source: newsroom.ucla.edu)
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