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Thread: Earthquake Changes Earth

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    Default Earthquake Changes Earth

    Since the quake, Japan is 8' closer to the USA and the earth's axis has shifted 10 cm.



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    Senior Member huntinman's Avatar
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    Hopefully it didn't move Roger any closer to TN...Nice and conservative here
    Bill Davis

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    Senior Member BrianW's Avatar
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    http://www.scientificamerican.com/bl...ged-2010-03-02
    How the earthquake in Chile could change Earth's axis

    By Katherine Harmon | Mar 2, 2010 06:30 PM |
    The magnitude 8.8 earthquake that jolted Chile on Saturday was felt as far away as São Paulo. But NASA scientists are proposing that its repercussions are truly global in a geophysical sense: it likely shifted Earth's axis by about eight centimeters.

    Interesting! i wonder if the Japan shift is a "e-collar correction" to the jolt in the Southern Hemisphere just about a year ago (? hmmm) or a further tilt off axis of the prior shift? .
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    I want to know how in the world they measure that.

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    Quote Originally Posted by ducknwork View Post
    I want to know how in the world they measure that.
    Laser
    To measure the varying distances from the Earth to the Moon, a 1" diameter laser beam is shot to the moon, it is reflected back and after that voyage of nearly a half million miles, the laser that returns is not even 2". The distance measured is correct within 1/10 of an inch.
    Laser is coherant light.



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    Senior Member zeus3925's Avatar
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    Quote Originally Posted by Doc E View Post
    Laser
    To measure the varying distances from the Earth to the Moon, a 1" diameter laser beam is shot to the moon, it is reflected back and after that voyage of nearly a half million miles, the laser that returns is not even 2". The distance measured is correct within 1/10 of an inch.
    Laser is coherant light.



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    Did they use your avatar?
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