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NASA: Chilean earthquake shifted Earth's axis

By T.K. Randall
March 3, 2010 · Comment icon 25 comments

Image Credit: NASA
NASA scientists believe that last month's Chilean earthquake likely shifted the Earth's axis and shortened the length of a day.
A significant earthquake can seriously redistribute the planet's mass, affecting the rotation and slightly changing the length of a day by a very small amount. Computer models have been used to calculate the effects.
The earthquake that killed more than 700 people in Chile on Feb. 27 probably shifted the Earth’s axis and shortened the day, a National Aeronautics and Space Administration scientist said.


Source: Business Week | Comments (25)




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Comment icon #16 Posted by Raptor 14 years ago
The article I read about this is that the scientists said it effected the length of the day, however they are unable to measure to that amount so it is all theory. In otherwords, they can't prove it. http://www.startribune.com/world/85961757.html That's misleading. We know that the earthquake has affected the rotation of the Earth, the physics behind it is actually very simple (the conservation of angular momentum - think of an ice skater spinning on ice, if their arms are out wide they spin slower than if their arms are tucked in). The question is "How much has it affected it?", which is a tr... [More]
Comment icon #17 Posted by SRCivic98 14 years ago
To put things in perspective: It will be approximately 68,571,428,571 days before this change will result in a loss of time equivalent to 24 hours. Everything affects the Earth's rotation. You walking from your living room to your kitchen does, so does stubbing your toe on the freezer. Given that, there's actually a group (IERS) that regularly meets to calculate how many seconds are required to be added to UTC to keep us in sync with Solar Time. Between 1972 and now, 24 seconds have been added in to do just that. Now compare that to the 460 microseconds lost per year as a result of this earthq... [More]
Comment icon #18 Posted by Mac E 14 years ago
That's misleading. We know that the earthquake has affected the rotation of the Earth, the physics behind it is actually very simple (the conservation of angular momentum - think of an ice skater spinning on ice, if their arms are out wide they spin slower than if their arms are tucked in). The question is "How much has it affected it?", which is a tricky question to answer because measurements can not be taken with such precision, compounded by the fact that the rotation of the Earth is always changing anyway so it would be difficult to isolate the exact effects caused by this single earthqua... [More]
Comment icon #19 Posted by Mira2020 14 years ago
What we need to do, then, is have everybody on Earth run as fast as they can to the East for about 4 or 5 minutes, all at the same time, to slow the rotation back down to what it is meant to be. Harte Or superman can do his thing and fly around at hyperspeed
Comment icon #20 Posted by zenfahr 14 years ago
Or superman can do his thing and fly around at hyperspeed lol first post and its a smart a** comment you are going to fit in well here welcome to the forum.
Comment icon #21 Posted by Ginger 14 years ago
I have heard of this before with other earthquakes. Yet, still have seen no proof of anything of the such. Scientists have said that these axis shifts will make drastic changes to the earth, possibly going as far as reversing the seasons. At least this article doesn't make such claims. Wrong, slight changes in the axis will not make drastic changes to the earth. If a drastic change in the axis happened then it would have drastic changes to the earth. Things are actually pretty simple.
Comment icon #22 Posted by DONTEATUS 14 years ago
Im waiting for the next big one and Im just going to Jump up just before it starts ! And when its over I should be in the next state of mind. Right?
Comment icon #23 Posted by ROGER 14 years ago
The change in the Earths axis should not effect the BBQ grilling done in Texas! Now if it did, WE would have a problem!
Comment icon #24 Posted by Bliszter 14 years ago
there is a rumor among the highschools here in my country, they say that someone "predicted" the chile earthquake and said that another major earthquake will happen in el salvador shifting the axis alot making the sea move and drown central america... loads of bull if you ask me, i just wanted to share the rumor
Comment icon #25 Posted by Nerupe 14 years ago
there is a rumor among the highschools here in my country, they say that someone "predicted" the chile earthquake and said that another major earthquake will happen in el salvador shifting the axis alot making the sea move and drown central america... loads of bull if you ask me, i just wanted to share the rumor Actually we we've been waiting for this earthquake for decades. Our country's over two major tectonic plates, we were actually worried because the last earthquake was in the 80s. I know the time thing isn't really anything...but just the thought that an earthquake can make such a chang... [More]


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