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[Y] Japan quake causes day to get shorter

post #1 of 66
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http://news.yahoo.com/s/ap/20110311/...BhbnF1YWtlY2E-

Quote:
WASHINGTON – You won't notice it, but the day just got a tiny bit shorter because of Friday's giant earthquake off the coast of Japan.

NASA geophysicist Richard Gross calculated that Earth's rotation sped up by 1.6 microseconds. That's because of the shift in Earth's mass caused by the 8.9-magnitude earthquake. A microsecond is one-millionth of a second.

That change in rotation speed is slightly more than the one caused by last year's larger Chile earthquake. But 2004's bigger Sumatra earthquake caused a 6.8-microsecond shortening of the day.

The Japan quake is the fifth strongest since 1900.
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post #2 of 66
Holy, that is very interesting :O
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post #3 of 66
Less sleep, darn.
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post #4 of 66
No. Just no. Goddammit!
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post #5 of 66
Less time for homework.
post #6 of 66

Imagine that, 1.6 humongous microseconds faster.
post #7 of 66
It's been like this for every major earthquake, Sichuan, Chile, New Zealand and now Japan.
Shhhhh!
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Shhhhh!
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post #8 of 66
OMG no wonder i felt the time was off today... i thought i was just going crazy
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post #9 of 66
It is rather important though, for high accuracy GPS systems. They have to recalibrate for the rotation difference of the Earth.
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post #10 of 66
So, why does the day always get shorter instead of longer? What if all an earthquake REALLY is, is an increase in the strength of gravity. Wrap your mind around that one, Favio.

I know I'm ignoring a couple major things here, but it's fun to think about.
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