[youtube=http://www.youtube.com/watch?v=-bvmEYxEYiA]Slow Motion Video of a Multiple Tower Upward Lightning Flash on 6/16/10

ztresearch | July 03, 2010

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.