TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY TOM A WARNER / WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Ultra-high-speed footage of three lightning strikes, triggered by an initial cloud-to-ground event (left). The first strike is a positive cloud-to-ground lightning strike (with continuing current), which triggers upward discharges from three 200-metre-tall TV towers. Also visible are the extremely fast recoil leaders which retrace the leader channels. Filmed at 9000 frames per second, in Rapid City, South Dakota, USA, in summer.
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