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NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

Posted March 02, 2010 8:14 AM

From Boing Boing:

The magnitude 8.8 earthquake that hit Chile over the weekend—killing hundreds, and leaving hundreds of thousands homeless—may have shortened the length of each Earth day, according to JPL research scientist Richard Gross. He computed how Earth's rotation should have changed as a result of the Feb. 27 quake. Using a complex model, he and fellow scientists came up with a preliminary calculation that the quake should have shortened the length of an Earth day by about 1.26 microseconds (a microsecond is one millionth of a second).

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#1

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 9:00 AM

I submit that all people around the Earth should make a simultaneous coordinated human effort to run westward at the same time.

6.7 billion people all running westward at the same time would turn the Earth into a giant treadmill, which would restore the Earth's rotation speed.

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#2
In reply to #1

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 12:25 PM

You fool! Did you not see the movie Superman? We'd run the risk of turning back the flow of time. Granted, not nearly by the same amount as Superman did (after all, he's super) - but enough so that our watches would always be a second or so ahead of earthbound clocks.

I'm not sure how that differential would lead to a global catastrophe for mankind...but I just know it would. Don't do it.

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#4
In reply to #2

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 3:12 PM

Wow! Good catch!

That was sort of like that idea where everyone was trying to get the world population to jump up and down at the same time. The National Inquirer said Top Scientists were worried that the simultaneous impact would form a black hole out of the Earth. Another close call!

:-)

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#11
In reply to #2

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 11:22 PM

We'd run the risk of turning back the flow of time.

I don't see a down side with that. I can think of plenty of things we might want to have a do-over for.

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#3
In reply to #1

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 2:51 PM

Isn't that what they call "full employment" ?

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#9
In reply to #1

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 11:20 PM

And such a project might do something about the booming obesity epidemic plague some nations too.

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#14
In reply to #1

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 12:40 AM

UNTIL THEY CAME TO A STOP. CONSERVATION OF ENERGY MY FRIEND!

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#30
In reply to #1

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 10:23 AM

Let's all synchronize our watches for a clean start.

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#5

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 3:43 PM

Not so much worried about the shorter day, but what about the "axis" change. More data please.

What will be the effect? Will we need to re-define the tropic lines? Will this mean a greater summer/winter temperature swing for the poles?

Come on guys, we can get more miles out of this mother nature event in a week than all the climate change gurus have managed in the last three decades.

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#6
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 10:12 PM

I am sure the U.N. is already seeing $$$ on this one.

I leave you with the wise words of Wednesday Adams, "Wait."

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#7
In reply to #5

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 10:30 PM

I'm pretty much amazed that an earthquake could have these effects. There's been a lot of seismic activity lately, I mean we are going through a patch of big quakes.

Just makes you wonder what could happen to the earths rotation and poles if there were a string of big ones.

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#23
In reply to #5

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 8:17 AM

I agree with you. The change in day length is interesting, but what I really want to see explained is the change in the earth's axis.

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#29
In reply to #23

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 10:16 AM

Hi bmorrow492, you wrote: "The change in day length is interesting, but what I really want to see explained is the change in the earth's axis."

Any change in the distribution of mass of a roughly spherical, spinning object will tend to change the spin axis in two ways: (i) a once-of change caused by the change in symmetry and (ii) a longer period wobble due to external gravity effects. In the case of Earth, our wobbles are primarily due to the Sun and Moon's gravitational pull on the non-homogeneous sphere.

-J

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#24
In reply to #5

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 9:03 AM

It will now run East West on Moday Wednesday and Friday.
Del

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#8

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 11:13 PM

My day's shorter? Damn! I'm going to be late for work!

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#18
In reply to #8

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 2:14 AM

standarded wrote: "My day's shorter? "

Not to worry; the moon adds ~17μs to our day every year! This has added up over time and presently causes a "leap second" every 18 months on average. If not, our clocks get out of step with mean solar time.

-J

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#19
In reply to #18

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 3:31 AM

Do you believe that quakes can modify daily rotation as suggested?

Chris

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#20
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 4:47 AM

Hi Chris, yes this can happen when the mass distribution of Earth is changed.

In this case, one heavy tectonic plate apparently pushed in beneath another one, resulting in a slight "pulling in of the ballerina's arms", so to speak. Since it is not an influence from the outside, Earth's angular momentum is maintained by the faster rotation.

-J

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#21
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 4:55 AM

Ah it's nice to see the Earth as a ballerina.. it's given me a smile on a world weary day.
Is its tutu round the Equator or the tropic of Capricorn?

Actually that very lucid analogy explains it nicely...I was actually thinking it was impossible, with action and reaction being equal and opposite...
Cheers
Del

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#22
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 6:49 AM

Oh good. I can sleep in.

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#10

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 11:21 PM

Good Day all,

On Sunday an Australian Friend of mine himself a : Mining Engineer, reminded me that probably the greatest earthquake known had caused a subsequent Tsunami's waves approaching the : Australian Eastern Coasts with waves of : 400 meters height (+ 1200 feet). It is asserted that the proof had been at finding : large + 50 kilos sea lumps of rocks all covered with marine life , oyster shells and the like which were evident thousand of years after ! These were found hundred of kilometers inland in some areas Obviously this would have been the : Mother of Eartquakes !

Yet and on reflecting continuously at the mining extractive activities in the world, and inevitably , I return to my earlier thoughts that ultimately, if a quake can throw the axis of revolution off its course , when then will an effect of : out of balance, will or may occur as we continue to deplete the earth of minerals such as coal the weight/density of which is forever lost ?

Labor Omnia Vincit

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#12
In reply to #10

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/02/2010 11:28 PM

Is pulling iron and other minerals out of the ground and turning it into something that is on the surface of the earth going to have much affect? I mean even if the stuff is pulled up from several miles down will that result in a significant change in the rotational moment of inertia of the Earth?

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#13
In reply to #10

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 12:23 AM

Guest-

Is this another excuse or plea to return us all to the hunter-gatherer lifestyle?

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#15
In reply to #10

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 1:06 AM

What about the effects of all the nuclear tests that have been done?

Could they not have also had some small effect?

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#16
In reply to #10

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 1:11 AM

There was a really big flood long ago that could account for this also.

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#17

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 1:35 AM

complete bs if you ask me.

btw, I just heard Anderson Cooper say that 1.26 microseconds was basically "A Millionth of a second"... jeez..

I think the JPL scientist went to the same school.

mass of earth = 5.9742 × 1024 kg. (source)

think about it.

Chris

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#27
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 9:56 AM

I agree - the earth is way too big to be subject to anything as quaint as Newtonian mechanics. And those NASA scientists who have spent their entire careers understanding the precise movements of the earth and planets can't be trusted. And 1.26 microseconds is nothing at all like a millionth of a second.

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#38
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 7:33 PM

PMSL

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#39
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 8:53 PM

my mistake.. I was thinking 3 decimal places was micro. as to the other... might make more sense now, coupled with Jorrie's clarification.

Chris

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#41
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/06/2010 12:30 PM

I was reading today that each Global Positioning System Satellite has 4 caesium atomic clocks on board, that are used to coordinate and synch the spin rate of the earth, and the position measured, and other factors. Enough data would obviously be gathered to be able to know the rotation of the earth accurately to 9 decimal places.

This isn't where I read it, but contains the info as a source.

Why Calculate? Measure!

Chris

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#25

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 9:37 AM

Do any of you guys believe in the God represented in the Bible, where it says that He is the Creator and Sustainer of the universe? I'm going to let Him worry about all of this.

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#26
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 9:55 AM

Amen.

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#28
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 9:58 AM

Ask him why he couldn't create a world that wasn't always trying to kill us.

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#32
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 11:14 AM

You'll have a chance to ask Him one day when you stand before Him as we all will. I sincerely hope you will be ready.

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#34
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 1:52 PM

You go first.

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#40
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/04/2010 9:27 AM

With my age, there's a good chance I will go first!

Hope you have a good day, my friend.

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#33
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 12:22 PM

The Bible is a heavily edited and spotty History book, written about the god-kings who moved here, and eventually created humans by DNA mixing. They had perfected their own DNA and given themselves lifetimes of a million years.. They were not, however, the absolute GOD that everyone thinks. They just spoke of themselves in that egotistical way. They were powerful and awesome 'supermen' and if you read the clay tablet interpretations, the "One God" was not absolutely permanent, nor was the Ruler of the Earth.. that position changed with the changing of the astrological house. (25000 years.) as I understand it. Its important to note the differences to an absolute being who created the universe. The gods in our bible did not do that. but all is really conjecture. I have visited the spirit world and believe in that ultimate reality, and our existence here is like a computer game in comparison. I believe the bible is just a book.

but don't just leave everything to God... there is just as much evidence to say that you (we) are the agents/representatives of God in this realm, and it is up to us to get things done properly. so far we aren't making very good representatives overall.

Chris

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#31

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 11:10 AM

I rather suspect Mother Nature has things in store for us, both terrestrially and cosmically that will put the hubris of man made changes in perspective.

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#35
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 5:11 PM

I agree. According to my trivial seismic forecasting system, we're in for some doozies between now and Octoberish 2013. Interesting times.

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#36
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Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 5:11 PM

The global warming/ climate change cultists already have that figured out and proven. They only have to wait for the unknown events and levels of influence to happen so as to be able to adjust( rewrite) their predictor mathematics to show that they had correctly predicted it earlier in some other form they had not already thought represented that influence.

Is that clear enough now?

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#37
In reply to #36

Re: NASA: Chile Quake Shortened Earth's Days, Bumped Planet Off Axis

03/03/2010 5:38 PM

I foresaw that you were right and predicted that I would give you a GA for that, and once again, all is as it should be/was and will be again.

882gsirhC

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