external geomagnetic field

См. также в других словарях:

• 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 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

• Earth's magnetic field — Computer simulation of the Earth s field in a normal period between reversals.[1] The tubes represent magnetic field lines, blue when the field points towards the center and yellow when away. The rotation axis of the Earth is centered and… …   Wikipedia

• Earth's field NMR — Nuclear magnetic resonance (NMR) in the geomagnetic field is conventionally referred to as Earth s field NMR (EFNMR). Note that the same acronym is used for electric field NMR.EFNMR is a special case of low field NMR.When placed in a constant… …   Wikipedia

• Magnetic field — This article is about a scientific description of the magnetic influence of an electric current or magnetic material. For the physics of magnetic materials, see magnetism. For information about objects that create magnetic fields, see magnet. For …   Wikipedia

• International Geomagnetic Reference Model — The International Geomagnetic Reference Model (IGRF) is mathematical representation of Earth s magnetic field developed by the National Oceanic and Atmospheric Administration (NOAA). It is used in applications to determine heading or attitude… …   Wikipedia

• Geomagnetically induced current — Geomagnetically induced currents (GIC), affecting the normal operation of long technological conductor systems, are a manifestation at ground level of space weather. During space weather events (or geomagnetic storms) Earth s near space current… …   Wikipedia

• North Magnetic Pole — Magnetic North redirects here, for other uses see Magnetic North (disambiguation) Part of the Carta Marina of 1539 by Olaus Magnus, depicting the location of magnetic north vaguely conceived as Insula Magnetu[m] (Latin for Island of Magnets ) off …   Wikipedia

• Electromagnetic pulse — Ebomb redirects here. For EBOM, see Engineering bill of materials. This article is about the general weapons effect. For other uses, see the more specific topic (for example, Electromagnetic forming) An electromagnetic pulse (sometimes… …   Wikipedia