On 03/20/2011 11:02 AM, cook michael wrote:
Le 17/03/2011 22:14, Jim Palfreyman a écrit :
Just for fun I plotted the UT1-UTC data from the IERS Bulletin A.
Here's the raw data:
I add the deltas
UT1-UTC
s delta
-0.18115
-0.18232 0,00161
-0.18353 0,00121
-0.1847 0,00117
-0.18576 0,00116
-0.18674 0,00098
-0.18763 0,00109
-0.18842 0,00079<=== 11/3 day of the quake
-0.18912 0,00090
-0.1897 0,00059
-0.1903 0,00060
-0.19103 0,00073
-0.192 0,00079
-0.19324 0,00124
I did a different exercise, I tossed the numbers into Gnumeric, removed
the offset of the first sample and linear slope was estimated very
coarsely and all I see is a wobble being sine-like. A shift in rate
would show up in the residues, but I can't see that. One has to have a
longer set of data to see it...
If you check that against the excess day length graph I don't think that
is change is significantly different, and any change would be expected
to be permanent as the mass redistribution is.
I can't see it in this body of data.
Cheers,
Magnus
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