more to do on the Indonesia quake but same principles http://www.livescience.com/environment/050112_earth_shape.html but who do they have to prove it to Please Register or Log in to view the hidden image! more here but kind of doomsday stuff too .the earthquake numbers don't really jive with some the usgs data ..... so you have to sift though some of it http://www.divulgence.net/
They use geophysical data from an earthquake to model how rock was moved by the earthquake, and how this change in mass distribution inside the Earth effects its rotation (and, hence, the length of a day).
Earthquake shifted earths axis/1.26 Micro seconds threads merged as they're essentially discussing the sane thing. Oh yeah, this has been a MODERATOR NOTE
Yep, it IS interesting! But I hope no one is getting worked up about it - people could not possibly notice the difference. You could sort of compare it to how much your thumbnail grows in 5 minutes.Please Register or Log in to view the hidden image!
One can take observations of the background stars and check how their paths across the sky has changed. With instruments sensitive enough to determine exoplanets, I'm sure you can measure the deviation in the Earth's rotation this way too. I'd like to know how this affected gps satellite readings and the accelerating north magnetic pole.
The scientists point is that the earthquake changed the earth's axis by a very small amount. .......But, as Gross noted in his Scientific American interview, the massive shifts of the Earth's plates have far less of an influence of the axis than even the breeze. "Changes in winds have by far the greatest effect on the length of the day: their effect is actually about 300 times larger. http://www.scientificamerican.com/blog/post.cfm?id=how-the-earthquake-in-chile-changed-2010-03-02 So, the earthquake is no great shakes. By changes in winds, he is talking about large scale changes, such as those produced in El Nino years, but I wonder if Giant Hurricanes have a similar scale of effect as this earthquake. Or would it be much smaller still? Newton would be very happy to know that his laws are still being obeyed after 300 odd years.
The effect on the GPS system will be negligible. Besides, they make minor corrections like this to the birds' programming/clocks very frequently anyway. Please Register or Log in to view the hidden image!
aren't GPS units tranceivers? Wouldnt they be able to receive and send data? If so can't they be reprogrammed for the minor changes?
That doesn't make sense to me, draqon, sorry. Or are your asking if the GPS satellites simply repeat what they receive? In which case the answer is no - as I said, their clocks (and programming, if needed) are updated regularly for minor changes. Those changes are needed due to relativistic effects and minor changes in orbital altitudes. Or are you asking about the GPS units that people buy and use?
OK, I'm with you now. They are receivers and process the information they receive from the satellites. They don't require internal clock corrections - that's needed in the satellites so that they send the correct data in the first place.
. i was going to post that topic lol i think that one day, a very far one day, earth will start rotating in the other way,
