PSN-L Email List Message
Subject: Fw: Infrasonic sound
From: "Larry Cochrane" cochrane@..............
Date: Mon, 18 Nov 2002 17:03:39 -0800
----- Original Message -----
From: "Lewis,Bob"
To:
Sent: Monday, November 18, 2002 5:03 AM
Subject: Infrasonic sound
> Larry: Please post this for me....
>
> Bob Lewis
> Plano, Texas
>
> This morning, a little after midnight Dallas time, I heard (or rather
felt)
> what seemed like
> an 8-10 Hz. sine wave. It lasted about 40 seconds, long enough for me to
go
> out into
> the back yard and try to figure out where it was coming from. It was not
> sharp or
> staccato, sounded like a clean sine wave. My seismometer, of course was
off
> at the
> time, but this seemed airborne rather than through the earth. I could not
> determine any
> direction; seemed to be coming from all around. Does any one have any
ideas
> as to
> what this may have been ??
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