I'am not sure how the big ring lasers have progressed over the past years. It seems the big New Zeeland earthquake messed up the nice ring lasers over there.
http://www.fs.wettzell.de/LKREISEL/G/LaserGyros.html http://www.phys.canterbury.ac.nz/ringlaser/about_us.shtml -- Björn > I believe a phase noise plot deep into the uHz or lower would apply to the > rotation rate of the earth. > > On Saturday, 23 July 2016, Hal Murray <[email protected]> wrote: > >> >> [email protected] said: >> > Earth is a very noisy, wandering, drifting, >> incredibly-expensive-to-measure, >> > low-precision (though high-Q) clock. >> >> What is the Q of the Earth? It might be on one of your web pages, but I >> don't remember seeing it. Google found a few mentions, but I didn't >> find a >> number. >> >> I did find an interesting list of damping mechanisms in a geology book. >> Geology-nuts are as nutty as time-nuts. Many were discussing damping of >> seismic waves rather than rotation. >> >> I've seen mention that the rotation rate of the Earth changed by a few >> microseconds per day as a result of the 2011 earthquake in Japan. Does >> that >> show up in any data? Your recent graph doesn't go back that far and >> it's >> got >> a full scale of 2000 microseconds so a few is going to be hard to see. >> >> >> >> -- >> These are my opinions. I hate spam. >> >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] <javascript:;> >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
