[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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