When earth rotates the magnetic poles are chanage or same?
ALTHOUGH IT HAS long served as a fixed reference for navigators, Earth’s magnetic field is anything but static. Over the course of decades and centuries, in what is called secular variation, the pattern of the field drifts randomly, such that at a given geographic location the direction a compass needle points may change by tens of degrees. Every 30,000 years or so things get more extreme: the magnetic poles suddenly begin shifting toward the equator, only to snap back into place. And changes even more radical than these “geomagnetic excursions” happen every few hundred thousand years, when the field flips completely upside down– north becoming south and vice versa. Some geophysicists think we may be in for such a polar reversal soon; over the past 2,000 years the whole magnetic field seems to have been weakening steadily, which may be the prelude to a flip. In the past, researchers have often tried to explain these various changes separately–and with limited success. Now, however, a
The magnetic poles do shift but probably this has nothing to do with the rotation of the earth. Deep underground, under even the deepest plates, the earth is molton lava. 95% of Earth’s mass is over 10,000 degrees but thankfully it’s all inside. Tectonic plates move while ‘floating’ on this lava but very slowly. When there is too much stress finally, their movement is felt to the Earth’s surface, resulting in an Earthquake. Some people think it is the moving of these plates that helps shift the magnetic poles but nobody knows for sure. But don’t worry….your compass will still be accurate thousands of years from now. This is a very slow activity.
