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Red Sprites and Blue Jets
This site is primarily a description of the University of Alaska research "into middle and upper atmospheric optical and electrical phenomena." It provides a description and images of red sprites and blue jets ("upper atmospheric optical phenomena associated with thunderstorms that have only recently been documented using low light level television technology"), a bibliography, and links to related information. From a professor of physics at the University of Alaska Southeast.
http://elf.gi.alaska.edu/

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