About: Geomagnetic secular variation

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Geomagnetic secular variation refers to changes in the Earth's magnetic field on time scales of about a year or more. These changes mostly reflect changes in the Earth's interior, while more rapid changes mostly originate in the ionosphere or magnetosphere.

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rdfs:label	Variación secular geomagnética (es) Geomagnetic secular variation (en)
rdfs:comment	Geomagnetic secular variation refers to changes in the Earth's magnetic field on time scales of about a year or more. These changes mostly reflect changes in the Earth's interior, while more rapid changes mostly originate in the ionosphere or magnetosphere. (en) La variación secular geomagnética se refiere a cambios en el campo magnético de la Tierra en escalas de tiempo de aproximadamente un año o más. Estos cambios reflejan principalmente cambios en el interior de la Tierra, mientras que los cambios más rápidos se originan principalmente en la ionosfera o magnetosfera. (es)
foaf:depiction
dct:subject	Geomagnetism
Wikipage page ID	25340789 (xsd:integer)
Wikipage revision ID	1090743593 (xsd:integer)
Link from a Wikipage to another Wikipage	Kew Observatory Derivative University of California Press Earth and Planetary Science Letters International Geomagnetic Reference Field Geomagnetic jerk Geomagnetic pole Geomagnetic reversal Geomagnetic excursion Magnetosphere Earth's magnetic field Dipole Magnetic declination Ionosphere Academic Press Geomagnetism Spherical harmonics Geomagnetic storms Secular variation Outer core Canadian Geological Survey Springer-Verlag Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Earth's interior Kluwer
Link from a Wikipage to an external page	http://magician.ucsd.edu/Essentials/index.html http://nrhp.focus.nps.gov
sameAs	Geomagnetic secular variation Geomagnetic secular variation Geomagnetic secular variation Geomagnetic secular variation Geomagnetic secular variation
dbp:wikiPageUsesTemplate	dbt:Cite_book dbt:Cite_journal dbt:Cite_web dbt:Refbegin dbt:Refend dbt:Reflist dbt:Short_description dbt:Harvid
thumbnail	wiki-commons:Special:FilePath/Earth_Magnetic_Field_Declination_from_1590_to_1990.gif?width=300
has abstract	Geomagnetic secular variation refers to changes in the Earth's magnetic field on time scales of about a year or more. These changes mostly reflect changes in the Earth's interior, while more rapid changes mostly originate in the ionosphere or magnetosphere. The geomagnetic field changes on time scales from milliseconds to millions of years. Shorter time scales mostly arise from currents in the ionosphere and magnetosphere, and some changes can be traced to geomagnetic storms or daily variations in currents. Changes over time scales of a year or more mostly reflect changes in the Earth's interior, particularly the iron-rich core. These changes are referred to as secular variation. In most models, the secular variation is the amortized time derivative of the magnetic field , . The second derivative, is the secular acceleration. (en) La variación secular geomagnética se refiere a cambios en el campo magnético de la Tierra en escalas de tiempo de aproximadamente un año o más. Estos cambios reflejan principalmente cambios en el interior de la Tierra, mientras que los cambios más rápidos se originan principalmente en la ionosfera o magnetosfera. El campo geomagnético cambia en escalas de tiempo de milisegundos a millones de años. Las escalas de tiempo más cortas surgen principalmente de las corrientes en la ionosfera y la magnetosfera, y algunos cambios pueden atribuirse a tormentas geomagnéticas o variaciones diarias en las corrientes. Los cambios en escalas de tiempo de un año o más reflejan principalmente cambios en el interior de la Tierra, particularmente el núcleo rico en hierro. Estos cambios se conocen como variación secular. (es)
prov:wasDerivedFrom	wikipedia-en:Geomagnetic_secular_variation?oldid=1090743593&ns=0
page length (characters) of wiki page	6680 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Geomagnetic_secular_variation
is Link from a Wikipage to another Wikipage of	History of geomagnetism International Geomagnetic Reference Field Geomagnetic reversal Geophysics Compass Earth Paleomagnetism Magnetic declination RAF Syerston Secular variation Plate reconstruction Outline of geophysics Paleomagnetic secular variation Paleosecular variation
is Wikipage redirect of	Paleomagnetic secular variation Paleosecular variation
is foaf:primaryTopic of	wikipedia-en:Geomagnetic_secular_variation

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