TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Ultra-high-speed footage of a single stroke of lightning beginning as a cloud flash, then with stepped leaders moving earthwards, until one connects with an upward leader from the ground to create the brilliant return stroke. An upward discharge off a nearby tower also is evident. Filmed at 7200 frames per second, in South Dakota, USA, in summer.
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