Hi John,
I personally have not heard of any research in that regard but it certainly would be interesting to pursue it further. I would also be interested in a more detailed write up of  how your barometer works.
Marino De Menech


>From: "John D Nelson" 
>Reply-To: psn-l@.............. 
>To: 
>Subject: Atmospheric Pressure 
>Date: Tue, 14 Oct 2003 08:22:15 -0500 
> 
>I stumbled into some posts on PSN in the 1996 era regarding atmospheric 
>pressure changes and their relation, if any to seismic activity. Has 
>there been any further research in this area? (forgive me for being too 
>lazy to read 7 years worth of posts to see.) I built an extremely 
>sensitive barometer using a manometer and optical switch based on a 
>Scientific American article and later modified it into a "dry" version 
>using a flexible diaphragm with a magnet on it and a Hall effect sensor. 
>It measures pressure indirectly by matching atmospheric pressure with a 
>heated chamber and measures the pressure indirectly as temperature 
>change of the heated chamber. The liquid version was sensitive to 
>within about 3/4 inch of water and the dry one is pretty close to that 
>value. It's pretty hard for me to correlate the pressure changes with 
>any activity here as seismic activity is pretty small on this piece of 
>the globe. 
> 
>John Nelson 

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