This article discusses our planet's magnetic field, which is in a constant state of change. The location of the North Pole has been moving north at an average speed of 10 km per year, lately accelerating to 40 km per year and at this rate it will exit North America and reach Siberia in a few decades. Researchers are beginning to understand how it behaves and why. They think that the magnetic field in generated by the dynamo effect of the inner core rotating at a different rate. Scientists have created a supercomputer model of Earth's interior. This site is enhanced by an audio version of the text along with diagrams and computer generated images.
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