[time-nuts] Q/noise of Earth as an oscillator

Scott Stobbe scott.j.stobbe at gmail.com
Fri Jul 29 11:11:33 EDT 2016

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 <hmurray at megapathdsl.net> wrote:

> tvb at LeapSecond.com 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.
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