PSN-L Email List Message

Subject: Re: tornadoes and earthquake detection
From: "Thomas Dick" dickthomas01@.............
Date: Wed, 25 Jan 2006 14:03:27 -0600

Geoff, where did you get these figures you made on the net on this date?

Sent: Friday, December 02, 2005 2:47 PM
Subject: Re: tornadoes and earthquake detection

> You should do a FFT analysis of your raw digital
> data and see if you can extract the rotational rate of the funnel cloud 
> from the data.
> I would expect the rotational rate of a .75 mile
> wide funnel with 100 mph wind speed to have
> a rotational period near 84 seconds or less.
> If the tornado was traveling at 60mph
> then the rotational speed was probably
> only about 100mph.
> It made me sad that was unable to see the
> seismic data, but what the hey, thats the story of my life.



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