PSN-L Email List Message

Subject: Re: Human Seismic Activity
From: Geoffrey gmvoeth@...........
Date: Fri, 4 Feb 2011 00:30:34 +0000


several years back,
Here In Arizona, some Mysterious
cowboy hatted person removed some tracks
and caused a freight train to derail.
At least that’s how I remember it.
I never heard more about it like
did they catch the culprit or not ?

Really nasty people seem to be able to get away with murder when
relatively harmless persons get raked over the coals.

Do you notice any special or different seismic signals
as the train rounds any corners ?

I used to watch fire trucks full of 2000Gals of water
as they went around the block and can see
how long a heavy vehicle stops for the light
at about 0.1 miles from here.

Every time they change direction, Accelerate or stop
they seem to create a signature.

I think three or four Hz is related to wheel rotation rates.
but not sure there.

Regards,
geoff


-----Original Message----- 
From: Randall Pratt
Sent: Thursday, February 03, 2011 8:20 PM
To: psnlist@..............
Subject: Re: Human Seismic Activity



Hi Chris,



No steam but I did live in Europe for some years and can verify trains here are quite a bit different.  What I see here is usually 3 
or 4 large diesel locomotives about 200 tones each pulling nearly 100 cars filled with corn or wheat to about 120 tones per car.  I 
haven’t investigated where in the path the seismic noise originates but there are a couple of bridges.  My bet would be on the 
transition across a bridge to earth since we do not have bedrock support in this area.  The car length and the bridge lengths are 
also similar so there could be a beating frequency over the abutments.  We also use shorter sections of rail in place of the long 
welded rails you have so there are rail joints adding to surface pounding.  The trains here are required to whistle at every road 
crossing and the track turns nearly directly away from me so I can count miles of distance just by listening to the train whistle. 
I can see the signal from the train which is about 1 mile in length until the far end is 3 – 4 miles from my house.  It might be 
interesting to do more research on this with frozen ground, wet ground and dry ground conditions.



Randy



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