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Date Posted: 07:40:05 05/23/00 Tue
Author: B. Hoon
Subject: Lightning and magnetic fields

Just thought may be of interest: Lightning travels from the ground up to make a connection. Never from the sky down. That's a optical illusion. Lightning is inert without ground current. The source of the upward current must have a source. Surprise surprise guess where it comes from. The crossing point of MAGENTIC FIELDS.
Also, lightning only occurs when a current from the ground ignites it.

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Replies:

[> Re: Lightning and magnetic fields -- Bob, 15:37:51 05/23/00 Tue

I'm no expert but I thought I heard that the actual charge goes from the ground up and the "trailor" (the 'spark') follows the path back down ?


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[> [> Re: Lightning (I know this much) -- Ken, 13:00:38 06/02/00 Fri

With the initial breakdown of the air in a region of strong electric fields, a streamer may
begin to propagate downward toward the Earth. It moves in discrete steps of about 50
meters each and is called a stepped leader. As it grows, it creates an ionized path
depositing charge along the channel, and as the stepped leader nears the Earth, a large
potential difference is generated between the end of the leader and the Earth. Typically, a
streamer is launched from the Earth and intercepts the descending stepped leader just
before it reaches the ground. Once a connecting path is achieved, a return stroke flies up
the already ionized path at close to the speed of light. This return stroke releases
tremendous energy, bright light and thunder.


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