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Van Allen belt Twit Definition of Van Allen belt Share Definition of Van Allen belt on Facebook Digg:Definition of Van Allen belt! stumble Definition of Van Allen belt Bookmark Definition of Van Allen belt on Delicious submit Definition of Van Allen belt to reddit Bookmark Definition of Van Allen belt
noun van, Van Allen belt
  1. Either of two torus-shaped areas of high-energy charged particles which partly surround Earth, trapped by its magnetic field. The areas are characterised by intense radiation. When the belts "overload", particles strike the upper atmosphere and fluoresce, causing the polar aurora.
  2. Any of similar areas around another planet.
Translations: 
    Etymology: From James Alfred Van Allen, US physicist.

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