the geomagnetic field

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• geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …   Universalium

• geomagnetic field — noun : a conventionalized symmetrical approximation of the earth s magnetic field having one diameter of the earth as its axis …   Useful english dictionary

• Geomagnetic storm — This article is about disturbances within Earth s magnetosphere. For other uses of magnetic storm , see Magnetic storm (disambiguation). Solar particles interact with Earth s magnetosphere. A geomagnetic storm is a temporary disturbance of the… …   Wikipedia

• Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …   Wikipedia

• Geomagnetic pole — Illustration of the difference between geomagnetic poles (Nm and Sm) and geographical poles (Ng and Sg). The geomagnetic poles are antipodal points where the axis of a theoretical dipole intersects the Earth s surface. This dipole is equivalent… …   Wikipedia

• Geomagnetic excursion — A geomagnetic excursion, like a geomagnetic reversal, is a significant change in the Earth s magnetic field. Unlike reversals however, an excursion does not change the large scale orientation of the field, but rather represents a dramatic,… …   Wikipedia

• geomagnetic pole — noun : either of two spots on the earth s surface that are at the ends of the axis of the geomagnetic field and that do not coincide with the geographical poles or the magnetic poles * * * geomagnetic pole, the hypothetical point in the Arctic or …   Useful english dictionary

• geomagnetic equator — noun : the great circle of the earth whose plane is perpendicular to the axis of the geomagnetic field compare magnetic equator …   Useful english dictionary

• geomagnetic — |jē(ˌ)ō+ adjective Etymology: ge + magnetic 1. : dealing with, derived from, or relating to terrestrial magnetism 2. : of or relating to the geomagnetic field …   Useful english dictionary

• field — /feeld/, n. 1. an expanse of open or cleared ground, esp. a piece of land suitable or used for pasture or tillage. 2. Sports. a. a piece of ground devoted to sports or contests; playing field. b. (in betting) all the contestants or numbers that… …   Universalium

• Field — /feeld/, n. 1. Cyrus West, 1819 92, U.S. financier: projector of the first Atlantic cable. 2. David Dudley, Jr., 1805 94, U.S. jurist (brother of Cyrus West and Stephen Johnson Field). 3. Erastus Salisbury, 1805 1900, U.S. painter. 4. Eugene,… …   Universalium