TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Upward lightning strikes propagating from tall TV towers. In this case the upward strikes were triggered by a positive cloud-to-ground strike, seen at the right of the clip. This is a classic case of lightning being triggered by a previous stroke. The first part of this clip is in real time, then the strikes are played back in slow motion. Filmed in South Dakota, USA, in summer.
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