Using buried lasers to detect Earth's rotation and earthquakes

[1oldman2]

I thought this was pretty cool, although it could have been posted in several areas, Earth seemed like a good spot.
http://www.sciencemag.org/news/2017/04/buried-lasers-will-sense-Earth's-spin-and-quakes-doing-twist

 

[davenn]

from the text accompanying that video ...

One of the first such lasers was C-II, a ring laser in the shape of a square with 1-meter arms, built in New Zealand in the mid-1990s and housed in a disused World War II bunker, where temperatures are stable.

The Canterbury Ring Laser project began in 1987. My astronomy friend, Clive Rowe, was, up till his retirement, an electronics tech
working on the project during the late 1980's and 1990 's ... he gave some interesting talks on the project at various astronomy club get-togethers
Canterbury University in Christchurch, New Zealand
http://www.phys.canterbury.ac.nz/ringlaser/about_us.shtml
https://ir.canterbury.ac.nz/handle/10092/5532

Dave