Saturday, August 27, 2005

Earth's Core Spins Faster Than Surface

Earth's Core
Live Science is reporting that geophysicists that reported the Earth's inner core spins faster than the surface of the planet in 1996, will be confirming that results in the journal Science. Over 700 to 1,200 years, the Earth's inner core apparently gains one full extra spin over the surface of the planet. This knowledge could lead to a better understanding of how the Earth generates its magnetic field.

The Earth's core operates like a giant electric motor, in which the spin of the motor is driven by a magnetic field. In the Earth's core, liquid iron rise and fall from the liquid outer core onto the solid inner core. The rising and falling of the charged liquid iron generates a magnetic field that rotates the inner core "like a huge rotor in an electric motor."


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