geomagnetic variations

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 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

• March 1989 geomagnetic storm — Artist s depiction of solar wind colliding with Earth s magnetosphere. The March 1989 geomagnetic storm was a severe geomagnetic storm that caused the collapse of Hydro Québec s electricity transmission system. It occurred during solar cycle 22.… …   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

• Ulrich Schmucker — (* 21. Juli 1930; † 27. Oktober 2008 in Peking) war ein deutscher Geophysiker, der insbesondere auf dem Gebiet der Geomagnetik arbeitete und einer der Pioniere der Erdmagnetischen Tiefenforschung war. Er studierte Geologie an der Georg August… …   Deutsch 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

• Solar variation — Solar variations are changes in the amount of solar radiation emitted by the Sun. There are periodic components to these variations, the principal one being the 11 year solar cycle (or sunspot cycle), as well as aperiodic fluctuations. Solar… …   Wikipedia

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …   Universalium

• Earth exploration — Introduction   the investigation of the surface of the Earth and of its interior.  By the beginning of the 20th century most of the Earth s surface had been explored, at least superficially, except for the Arctic and Antarctic regions. Today the… …   Universalium