I suspect these are military footstep detectors.
_______________________________
               
                     Al  Allworth

On the Beautiful Southern Oregon Coast

________________________________
----- Original Message ----- 
From: "Doug Crice" 
To: "PSN-L Mailing List" 
Sent: Thursday, October 12, 2000 2:10 PM
Subject: Seismic sensors


> Does anybody recognize these "seismic sensors"?  Since they come from
> the area of Mt. Hood, might they be micro-earthquake gear for tracking
> volcanos?
> 
> http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=460949352
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