Results 151 to 160 of about 447 (185)

Secular Variations of the Geomagnetic Field in Europe

2009
Geoinformation Issues, 2009, Vol.
Sas-Uhrynowski, Andrzej, Welker, Elżbieta   +1 more
openaire   +1 more source

Varying geomagnetic anomalies and secular variation

Journal of Geophysical Research: Solid Earth, 1983
The time variations of the geomagnetic field at 10 European observatories were examined in detail. Fourier analyses were made for three field components at each of the observatories. Curves for each component were synthesized for three passbands: A low passband for periods greater than 30 years, a mid passband for periods equal to or less than 30 years
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Secular trends in daily geomagnetic variations

Journal of Atmospheric and Terrestrial Physics, 1980
Abstract After removal of seasonal and sunspot cycle effects, the solar ( S ) and lunar ( L ) daily geomagnetic variations at Hermanus, Huancayo and San Juan are found to have significant secular changes. The solar variations are shown to be more closely fixed to local magnetic coordinates than to geographic coordinates.
openaire   +1 more source

Historical Secular Variation and Geomagnetic Theory

1989
The historical record of magnetic observations from AD 1695 has been analyzed to give maps of the magnetic field at the core-mantle boundary for the last 300 yr. These maps have been interpreted qualitatively in terms of a stationary dynamo field with hemispheric symmetry and a pattern of secular variation linked to the base of the solid mantle by ...
openaire   +1 more source

The Geomagnetic Secular Variation in the Ross dependency

New Zealand Journal of Geology and Geophysics, 1963
Abstract The first magnetic observations in the Ross Dependency were made by Sir James Clark Ross in 1840. Since then various expeditions have carried out magnetic measurements, but until the beginning of the International Geophysical Year (IGY) the results were scanty.
openaire   +1 more source

Geomagnetic Field, Secular Variation

2011
openaire   +3 more sources

Secular Variation of the Geomagnetic Field

1985
Tsuneji Rikitake, Yoshimori Honkura
openaire   +1 more source

True Magnitude of the Geomagnetic Secular Variation

Physical Review, 1950
C. J. Swift, W. M. Elsasser
openaire   +1 more source

The geomagnetic secular‐variation timescale in observations and numerical dynamo models

Geophysical Research Letters, 2011
Julien Aubert, Florian Lhuillier, Alexandre Fournier   +2 more
exaly  

Geomagnetic secular variation in the Cretaceous Normal Superchron and in the Jurassic

Physics of the Earth and Planetary Interiors, 2008
C G Langereis, Douwe Van Hinsbergen, Andrew Biggin   +2 more
exaly