Magnetic Variation
Magnetic Variation, also known as magnetic declination, is the angle between magnetic north and true north at a particular location on the Earth's surface. It is caused by the difference between the Earth's magnetic field and its geographic axis. Magnetic variation is important for navigation, as it affects the accuracy of compasses and other magnetic instruments. It is also used in the creation of nautical charts, which show the variation at different locations. Magnetic variation can change over time and varies depending on the location on the Earth's surface.
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