PSN-L Email List Message

Subject: Re: Strain meters?
From: "Robert W. Avakian" ravakian@............
Date: Sat, 20 May 2000 17:51:08 -0500

If the measurement need not be continuous, optical methods may be
cheaper and easier.  A couple of concrete piers and an inexpensive laser
could be used with great effect I would think.  Strain meters need to be
fixed rigidly at both ends do they not?  A problem in loose soils.    

Jim ODonnell wrote:
> Sean Thomas et al,..
> A student at UNLV would like to measure movement across some fissures in
> Las Vegas.  The fissures are cracks in the soil (deep alluvium) about 10m
> long in an area of mapped faulting.  I was wondering if strain meters
> would do the trick, the cheaper the better,and can you recommend or
> suggest any methods or devices that would work?
> Jim O'Donnell
> Registered Geologist No. 1240, State of California, 1970
> Registered Geophysicist  No. 158, State of California, 1974
> 702 293-5664
> jimo17@........
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Larry Cochrane <cochrane@..............>