June 19 2013 04:57:19.273 UTC This was a "donut" ELVE and sprite that happened over the western Oklahoma panhandle. A donut ELVE exhibits a hole in the center and is more powerful than a regular ELVE. An ELVE is an extremely dim, short-lived, expanding disk of reddish light above thunderstorms, believed to be caused by electromagnetic pulses from intense lightning in the lower ionosphere. Elves last typically only one millisecond and can be as wide as 500 km (310 mi) in diameter. From Wikipedia: ELVES is a whimsical acronym for Emissions of Light and Very Low Frequency Perturbations due to Electromagnetic Pulse Sources. This refers to the process by which the light is generated; the excitation of nitrogen molecules due to electron collisions (the electrons possibly having been energized by the electromagnetic pulse caused by a discharge from an underlying thunderstorm. See another ELVE capture here: More observations : http://heliotown.com/Table_of_Contents.html Thomas Ashcraft : Heliotown : New Mexico MAIL Images below of event were captured by Kevin Palivec in Hawley, Texas. Thanks Kevin! |
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