[time-nuts] UTC and leap seconds

jimlux jimlux at earthlink.net
Fri Jun 11 17:43:50 UTC 2010

Tom Van Baak wrote:

> Whether the answer is (a) or (b) doesn't change the fact that
> the earth day is a poor clock compared with other clocks now
> available. Besides tidal friction effects which might be hard to
> imagine, or lunar effects which you already know about, note
> that every time it rains or glaciers form and melt it changes the
> angular momentum of the poor spinning planet. Then again,
> many OCXO are also affected by humidity...

The Chilean earthquake changed the angular rotation rate (or, probably 
more accurately, changed the direction of the axis of rotation as well) 
  of the earth a small amount, as do most large earthquakes.

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