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The south magnetic pole, also known as the magnetic south pole, is the point on Earth's Southern Hemisphere where the geomagnetic field lines are directed perpendicular to the nominal surface. The Geomagnetic South Pole, a related point, is the south pole of an ideal dipole model of the Earth's magnetic field that most closely fits the Earth's actual magnetic field.
For historical reasons, the "end" of a freely hanging magnet that points (roughly) north is itself called the "north pole" of the magnet, and the other end, pointing south, is called the magnet's "south pole". Because opposite poles attract, Earth's south magnetic pole is physically actually a magnetic north pole (see also North magnetic pole § Polarity).
The south magnetic pole is constantly shifting due to changes in Earth's magnetic field. As of 2005 it was calculated to lie at 64°31′48″S 137°51′36″E / 64.53000°S 137.86000°E,[2] placing it off the coast of Antarctica, between Adélie Land and Wilkes Land. In 2015 it lay at 64°17′S 136°35′E / 64.28°S 136.59°E (est).[3] That point lies outside the Antarctic Circle. Due to polar drift, the pole is moving northwest by about 10 to 15 kilometres (6 to 9 mi) per year. Its current distance from the actual Geographic South Pole is approximately 2,860 km (1,780 mi).[1] The nearest permanent science station is Dumont d'Urville Station. While the north magnetic pole began wandering very quickly in the mid 1990s, the movement of the south magnetic pole did not show a matching change of speed.
Year | 1990 (definitive) | 2000 (definitive) | 2010 (definitive) | 2020 |
---|---|---|---|---|
North magnetic pole | 78°05′42″N 103°41′20″W / 78.095°N 103.689°W | 80°58′19″N 109°38′24″W / 80.972°N 109.640°W | 85°01′12″N 132°50′02″W / 85.020°N 132.834°W | 86°29′38″N 162°52′01″E / 86.494°N 162.867°E |
South magnetic pole | 64°54′36″S 138°54′07″E / 64.910°S 138.902°E | 64°39′40″S 138°18′11″E / 64.661°S 138.303°E | 64°25′55″S 137°19′30″E / 64.432°S 137.325°E | 64°04′52″S 135°51′58″E / 64.081°S 135.866°E |