The main geomagnetic field is formed in the outer core of the Earth and can be measured on the surface or in space. In the first approximation, the geomagnetic field of the Earth can be represented by the field of a dipolar magnet placed in the center of the planet. Geomagnetic poles migrate at the Earth’s surface continuously, and reversals of the geomagnetic field direction occurred many times in the Earth’s geological history. Short-term and long-term changes of the geomagnetic field are constantly monitored and studied by geophysicists because they carry important information about the current state of the geomagnetic field and past magnetic events. The magnetic field has an effect on a variety of phenomena on Earth, in the atmosphere, and closest space. Magnetic measurements are commonly used for chronology and are important in geophysical exploration, for navigation, aerospace, and geodesy.
CITATION STYLE
Kravchinsky, V. A. (2015). Geomagnetism. In Encyclopedia of Earth Sciences Series (pp. 298–301). Springer Netherlands. https://doi.org/10.1088/0031-9112/30/11/024
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