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Magnetic declination

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Magnetic declination, also known as magnetic variation, is the angle between magnetic north (the direction a compass points) and true north (the geographic north pole) at a given location on the Earth's surface. This angle is measured in degrees east or west from true north. Because the Earth's magnetic field is not uniform, magnetic declination varies depending on where you are located. It can change over time due to shifts in the Earth’s magnetic field.

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