Caption: Extreme high-speed footage of a lightning strike. Lightning is an electrical discharge that occurs when a thundercloud accumulates a high enough electrical charge. The base of the cloud produces several negatively-charged leaders, which form channels of ionised air as they move towards the ground. Many of these leaders do not make contact with anything and fade out. If a leader reaches the ground, or makes contact with an induced upward-growing positively-charged leader, a massive discharge occurs through the channel of ionised air. This is called the return stroke, and is the bright bolt that is usually observed. There are usually several discharges down a channel once it is established, as seen here. This gives the lightning a flickering appearance when viewed at normal speed.

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Keywords: air, america, american, atmosphere, atmospheric, black and white, branching, cg, cloud-to-ground, clouds, cumulonimbus, dart, environment, extreme, flash, flashes, fork, forked, high speed, high-speed, high-speed video, ionised, ionized, leader, leaders, lightning, meteorology, monochrome, multi-strike, multiple, overcast, return stroke, slo-mo, slow motion, slow-mo, slowed down, stepped, strike, strikes, strokes, summer, thunderstorm, ultra, united states, us, usa, weather

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Lightning strike, high-speed

K003/6092 Royalty Free

Downloadable master

Duration: 00:02:23.21

Frame size: 1440x1080

Frame rate: 29.97

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 1.9G


Capture format: Phantom

Frame size: 1280x1080

Codec: DVCPRO HD 1080i60

Interlaced: Yes

Please contact Science Photo Library if you require the original, or other formats.


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