PSN-L Email List Message

Subject: Re: Human Seismic Activity
From: Christopher Chapman chrisatupw@.......
Date: Thu, 3 Feb 2011 12:29:31 -0500 (EST)







I would suspect railroad traffic sequenced along a track.  During the night=
 when other traffic is quiet you may see the railroad from farther distance=
..  In my location the noise builds and then decays over several minutes.  I=
 don=E2=80=99t see one every hour but there is a daily schedule that shows =
up and when the wind is right I hear the whistle to verify. =20
=20
    Hi Randy,

    From this I assume that you still have steam trains with very heavy eng=
ines, in the US? We are mostly electrified with motors in each carriage, bu=
t there are some local Diesel trains. We don't often see train signals, unl=
ess we are very close to a line.

    Regards,

    Chris


I would suspect railroad traffic sequenced alon= g a track.  During the night when other traffic is quiet you may see t= he railroad from farther distance.  In my location the noise builds an= d then decays over several minutes.  I don=E2=80=99t see one every hou= r but there is a daily schedule that shows up and when the wind is right I = hear the whistle to verify. 
 
    Hi Randy,
 
    From this I assume that you still h= ave steam trains with very heavy engines, in the US? We are mostly electrif= ied with motors in each carriage, but there are some local Diesel trains. W= e don't often see train signals, unless we are very close to a line.=
 
    Regards,
 
    Chris

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