In early August I mentioned the "quick and easy" seismic sensor that 
I've been working on.  After the recent Mw 7.7 earthquake in P.N.G., 
I'm now confident that it works.  Background noise is the biggest 
problem that I see at this time, and that may be due to the poor 
location of the sensor on a table on the third floor of the town 
house where I'm currently living.  I'll be moving to a house soon, 
and will see how it works in a quieter location.

See the "Version 3" pictures and recent seismograms here:
http://jclahr.com/science/psn/wooden/ .

This is similar to the vertical that Dewayne Hill built and has 
described here:  http://jclahr.com/science/psn/hill/index.html
Dewayne, if you're still on this list, what is your current E-mail address??


Cheers,
John


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