Multiple tower
upward lightning
flash captured at
9,000 images per
second in Rapid
City, SD on
6/16/10. A
preceding downward
positive ground
flash tr
(more)
Multiple tower upward lightning flash captured at 9,000 images per second in Rapid City, SD on 6/16/10. A preceding downward positive ground flash triggers upward leaders from seven towers, three of which are visible in the video.
