A look at the PBO Durmid Hill (EW) Strainmeter Project
Initial site work -- May 2004
drilling for end-point optical anchors
(click picts for full image).
After working through summer -- October 2004:
setting one of the two end-buildings
(click pict for full image).
Completed installation -- May 2005:
end-building with vacuum tube
(click pict for full image).
Optics Table :
laser strainmeter and optical-anchor optics
(click pict for full image).
Initial Long Period Recordings -- February 2006
length-change, corrected using anchoring, giving earth strain
(click for full image).