Andy,

It would definitely make a barometer.

One shouldn't forget that from quakes you're going to have really 
small motions.  For example, a Tonga mag. 5.9 recorded last month 
created a maximum peak-to-peak vertical ground motion in California 
of 0.009 mm or about 0.00036", with a period of about 16 
seconds.  Not very much.

Regards,
Brett

At 03:41 AM 11/10/2010, you wrote:
>Hi Geoff and list,
>Thanks for the ideas, it is the very think-tank nature of these 
>exchanges that can trigger fresh ideas. In this case it was the 
>mention of a spring and types of spring that made me think of a 
>vacuum, and then water barometer. A quick Google and I found that 34 
>foot is about the length of the column of water required. As it 
>happens my floor level to water surface is about 10 metres which 
>would about do it!
>I would then need to monitor the water level at the top of the water 
>barometer. What do you think? at the very least I would get warning 
>of changes in the weather!
>Regards,
>Andy


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