Geomagnetic reversal time how long?

While the two poles of the earth changes, this kind of thing we usually seldom considered, because the entire solar system, after its formation, the same thing happened only a few times. Many people are confused about the difference, the change and the geomagnetic reversal poles confused. In fact, they are not the same thing. Geomagnetic reversal time how long? The reason of the reversal of the geomagnetic field we are still not very clear, but it is mainly with the internal power on. When the rotation of the earth, in the core of liquid iron will flow freely, producing a large number of free electrons move along. This movement of charged particle convection will set up a magnetic field, magnetic poles are respectively located in the earth's polar regions of North and south. This is the famous generator effect. The resulting magnetic pole is like a bar magnet, the magnetic field that surrounds the entire earth. In 2008, the earth physicist Dan Lethrop (Dan Lathrop) is trying to establish an own earth model, for which he produced 26 tons of heavy ball, interior also contains a similar liquid iron core. He made the ball spin, to see whether the internal fluid motion of its can produce a magnetic field. The experiment successfully let us know that the earth's magnetic field is how to produce.