PSN-L Email List Message
Subject: Re: Modified sound card and datalogging and geophones
From: Gordon Couger gcouger@..........
Date: Fri, 22 Jul 2005 01:12:00 -0500
Since I am doing it for my own use on my own land or land I have
a long time relationship with the owners I can ignore almost all
of the problems you outline. I am not sure you can make anything
useful that will meet today's pc safety standards. I don't think
the hammer and planks would be free of liability. Where I am I
think I can still get dynamite unless it has changed since 9/11.
But the shot gun shell down the tube sounds the best.
I am only interested in a pretty homogenous mix of sand and
gravel over a red bed looking for courser gravel. I can wait
until it highly saturated if I have to. It happens ever 2 or 3
years. I know the output of every well for about 5 square miles
and I have access to 3 wells in a mile and half that put out
enough water to build a drip irrigation system if I can find 3
more on one quarter section that is as good or better that the
one I have.
We have dug test well several times over the last 50 years and
only found one good well.
If I find any promising areas the farmer and I are going to try
jetting down a 4 inch well. He has lots of farms in the same
area that have better water than my place but the cost of
commercially drilled and developed well are too high for
landlords to invest in 4 or 5 to feed an irrigation system.
Right now I am working on the sensors and recording them. A
laptop would be nice for the reason you give. I can do it with
an A/D board as well. But I will try the sound card first.
Fortunately I have some friends that have hands on experience
with reading seismic data. We all have questions about being
able to see the difference in the gravel sizes and the porosity
of the sands. The 75 gpm well I have is 150 feet from one that
you can run dry with a garden hose in an hour.
Doug Crice wrote:
> For as long as I have been in seismic, people have been
trying to build a
> good energy source for engineering seismic studies. Let me
define such a
> device for you experimenters out there.
> 1) A person ought to be able to carry it around
> 2) It needs reasonably high frequency output (ping instead of
> 3) Build it for $1000 or even $2000 in lots of 10 units,
> commercially available and machined parts.
> 4) It should be safe, even when used by students
> 5) There should be no significant regulatory issues (a
> dynamite, the perfect source)
> 6) Operating supplies available in third world countries.
> 7) And last but not least, it needs to work better than a
> with a seismograph that can stack multiple impacts.
> The in-hole shotgun comes close, but it is possible to shoot
yourself in the
> foot, blow your hand off, and in one case, blow your brains
> associated liability prevents any real company from producing
> Even if you made it impossible to accidentally hurt yourself,
under our tort
> system, you would still be liable for intentional injuries.
> Geostuff will be happy to sell the device using our worldwide
> contacts, assuming it works and is reliable. Mechanical
things tend to self
> Doug Crice http://www.geostuff.com
> Wireless Seismic http://www.wirelessSeismic.com
> 12996 Somerset Drive phone 1-530-274-4445
> Grass Valley, CA 95945 USA fax 1-530-274-4446
> I know a gun fired in the ground is not a good source and that's
> why I included a drop hammer lifted by a bank and dropped back
> on the rod that is attached to a steel plate that sets on the
> ground. I may have to use a propane to lift the slide over the
> piston instead of a blank shot gun shell,
> Public Seismic Network Mailing List (PSN-L)
> To leave this list email PSN-L-REQUEST@.............. with
> the body of the message (first line only): unsubscribe
> See http://www.seismicnet.com/maillist.html for more information.
Public Seismic Network Mailing List (PSN-L)
[ Top ]
[ Back ]
[ Home Page ]