On 3/15/11 1:49 AM, Chris H wrote:
Hello,
Firstly may I just say, my thoughts are with members of this list who
are in Japan.
Just a bit of an odd question...
I hear in the Media that the earth quake sped the rotation of the earth
up..
Can anyone confirm this?
Yes, the media reported it. Yes, it's probably true, BUT, you can't
really measure it directly (you'd have to infer it from other measurements)
There was a discussion of this on this list with the last big
earthquake, as well.
Does this mean that we will not need to 'insert leap seconds' for a
while, or does it mean that we will need to retract leap seconds that
have been added?
No.. the magnitude of the change is parts in 1E11 or thereabouts.
Regular old tidal drag slowing is bigger, and that's what mostly
contributes to leap seconds.
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