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Originally posted by artistpoet
Look at any authentic Scientific data regarding Polar Reversal and read the facts for yourself then make your own mind up what this indicates.
My point is that Magnetic North which indicates true North South etc is shifting at an accelarated rate for reasons unseen.
Originally posted by ngchunter
Originally posted by artistpoet
Look at any authentic Scientific data regarding Polar Reversal and read the facts for yourself then make your own mind up what this indicates.
My point is that Magnetic North which indicates true North South etc is shifting at an accelarated rate for reasons unseen.
Wrong. True north is not changing at an appreciable rate. Other than precession and the even smaller chandler wobble it's not changing at all. If it were, goto telescopes would stop working properly and permanently mounted scopes would stop tracking the sky properly. Neither of those things are happening.
Originally posted by artistpoet
True North is not magnetic North - True North indicates the cardinal points of where we are in relation to our position upon the Earths Crust.. Magnetic North indicates the inner movement of the Earths core
My point is that Magnetic North which indicates true North South etc is shifting at an accelarated rate for reasons unseen.
Originally posted by Phage
Originally posted by artistpoet
True North is not magnetic North - True North indicates the cardinal points of where we are in relation to our position upon the Earths Crust.. Magnetic North indicates the inner movement of the Earths core
The problem is, you said:
My point is that Magnetic North which indicates true North South etc is shifting at an accelarated rate for reasons unseen.
You seem to have gotten a bit mixed up. Magnetic north does not "indicate" true north, they are not related. True north is based on the axis of Earth's rotation.
Originally posted by artistpoet
True North is not magnetic North - True North indicates the cardinal points of where we are in relation to our position upon the Earths Crust.. Magnetic North indicates the inner movement of the Earths core
Originally posted by ngchunter
Originally posted by artistpoet
True North is not magnetic North - True North indicates the cardinal points of where we are in relation to our position upon the Earths Crust.. Magnetic North indicates the inner movement of the Earths core
Ok, I'm all confused, before you said that the change in magnetic north indicates a change in true north. Aside from the phenomenon I already mentioned, true north isn't changing.
gnetic North is shifting at an expedential rate meaning it is speeding up.
Pole Reversal would affect the Earths Crust Dramatically.
However for now yes True North is still the same.
This map shows how the north magnetic pole has shifted over the past century. Notice that it has picked up speed and has moved more in the last 15 years than in the 50 years before that, now moving about 25 miles per year on its way out of Canada and heading to Russia.
So, how does this effect compass use and navigation? Well, if you follow your compass north this year, you will be drawn towards a different place than 15 years ago. Declinations are constantly changing and that means what is written on a map you buy this year will be incorrect next year.
Originally posted by Phage
reply to post by artistpoet
We could be in the midst of a geomagnetic reversal but there is no reason for a magnetic shift to result in crustal displacement.
The last magnetic reversal occurred about 800,000 years ago. What evidence is there of a crustal displacement at that time?
The Earth rotation Center of the International Earth Rotation Service (IERS) at the Observatory of Paris has in particular the role of follow-up in quasi-real time of the variations of the earth motion by using the observations resulting from various space techniques like the GPS, interferometry on extragalactic radio sources as well as laser telemetry on satellites and the Moon. The fine analyses of the variations observed in the "polhodie" (see figure 1) did not show a discernible effect.
Originally posted by Phage
reply to post by artistpoet
A volcanic eruption is movement of magma and gasses from deep in the crust to the surface. It is not a crustal displacement.
Fossils of sea life are found in mountains everywhere. Ancient seabeds have been lifted, because of tectonic activity, over millions of years. I suppose you could call that crustal displacement but it has nothing to do with the magnetic poles.
Why would magma be affected by a magnetic reversal? The Earth's magnetic field is very weak (though large). Even if the ferrous content of magma were high enough, molten metal is far above the curie point and is not affected by magnetism.
Why would a magnetic reversal, which occurs over a period of thousands of years, cause earthquakes? There was no measured "wobble" of the Earth as a result of the Sumatra earthquake.
The Earth rotation Center of the International Earth Rotation Service (IERS) at the Observatory of Paris has in particular the role of follow-up in quasi-real time of the variations of the earth motion by using the observations resulting from various space techniques like the GPS, interferometry on extragalactic radio sources as well as laser telemetry on satellites and the Moon. The fine analyses of the variations observed in the "polhodie" (see figure 1) did not show a discernible effect.
www.obspm.fr...
There were localized movement, as to be expected in such a large earthquake, I am not aware of any measured "shrinkage" of the Earth's size.
edit on 9/20/2010 by Phage because: (no reason given)