Geomagnetic Field Lines
Geomagnetic field lines are imaginary lines that represent the direction and strength of the Earth's magnetic field. These lines are used in aviation to navigate using a compass. The Earth's magnetic field is not uniform and varies in strength and direction at different locations on the Earth's surface. This variation is caused by the movement of molten iron in the Earth's outer core. Geomagnetic field lines are used to determine the magnetic declination, which is the difference between true north and magnetic north. This is important for pilots to know in order to navigate accurately using a compass.
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