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From: fred@mnetor.UUCP (Fred Williams)
Newsgroups: net.physics
Subject: Re: Lightning
Message-ID: <1366@mnetor.UUCP>
Date: Thu, 18-Jul-85 09:13:43 EDT
Article-I.D.: mnetor.1366
Posted: Thu Jul 18 09:13:43 1985
Date-Received: Thu, 18-Jul-85 10:32:09 EDT
References: <936@teddy.UUCP>
Reply-To: fred@mnetor.UUCP (Fred Williams)
Distribution: net.physics
Organization: Computer X (CANADA) Ltd., Toronto, Ontario, Canada
Lines: 20
Summary: 

In article <936@teddy.UUCP> rdp@teddy.UUCP (Richard D. Pierce) writes:
>
>The strokes (flashes, what have you) seemed not to occur at random intervals,
>but with a very definite pattern. There would be a period as long 10 seconds
>during which no lightning would occur, the, as soon as one flash would occur,
>many more would, at very different location.

	I seem to remember an article in some science magazine about
lightning strokes being mapped. The method used was an array of
microphones to record the thunder. Signal analysis, was then used
to map the source of the noise, and the pattern of the lightning
stroke could be clearly shown.
	The results, as I recollect, were that we generally only
see a small portion of the discharge. A single discharge can span
many miles hidden from the ground by cloud.  I suspect that the
many flashes you saw could really be different parts of the same
stroke. I cannot of coarse be sure. I wasn't there.

Cheers,		Fred Williams