I just read about an ELVE above the Czech Republic. ELVE - Emissions of
Light and Very Low Frequency Perturbations. http://spaceweather.com/ has
an article and an image. The phenomenon creates a red doughnut shaped
ring lasting less than 0.001 seconds. It does require a more forceful
lightning stroke than normal: 150-350 kiloAmps; approximately ten times
the normal strike.
With the recent talk of antenna protection from a local strike I thought
this reference was timely.
Kevin. KD5ONS
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