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Thread: Earthquake Changes Earth

  1. 03-13-2011, 02:13 PM #1
    Doc E
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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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  2. 03-13-2011, 02:16 PM #2
    huntinman
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    Hopefully it didn't move Roger any closer to TN...Nice and conservative here
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  3. 03-13-2011, 02:28 PM #3
    BrianW
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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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  4. 03-13-2011, 07:51 PM #4
    ducknwork
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    I want to know how in the world they measure that.
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  5. 03-13-2011, 08:29 PM #5
    Doc E
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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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  6. 03-14-2011, 08:13 AM #6
    zeus3925
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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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