Magnetic North – Definition
Magnetic North refers to the direction in which a compass needle points. Unlike the geographical North Pole, Magnetic North is not a physical location on the Earth’s surface but rather a position determined by the Earth’s magnetic field. The Earth’s magnetic field is created by the movement of molten iron in its core, and lines of magnetic force extend from the North Magnetic Pole to the South Magnetic Pole.
The Magnetic North Pole does not coincide with the geographical North Pole, and its location changes over time due to variations in the Earth’s magnetic field that are caused by changes in the Earth’s rotation and by the movement of molten iron in the core. The difference between Magnetic North and the geographical North Pole is called Magnetic Declination, and it varies depending on the location on the Earth’s surface.
The measurement of Magnetic North is important in navigation, especially in regions where there are no visible landmarks or where the weather conditions make it difficult to determine direction. By using a compass, which is calibrated to Magnetic North, it is possible to determine the heading needed to navigate to a specific location. Magnetic North is also used in the creation of maps and charts, which help to navigate the Earth’s surface.
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