St. Elmo's fire (also called witchfire or witch's fire) is a weather phenomenon in which luminous plasma is created by a corona discharge from a rod-like object such as a mast, spire, chimney, or animal horn in an atmospheric electric field. It has also been observed on the leading edges of airplanes, as in the case of British Airways Flight 009, and by U.S. Air Force pilots.
The intensity of the effect, a blue or violet glow around the object,... meer
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