Results 11 to 20 of about 14,851 (262)

Four decades of European geomagnetic secular variation and acceleration

open access: yesAnnals of Geophysics, 2009
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Monika Korte   +2 more
doaj   +1 more source

Valuation of induction current contribution to the secular variation of geomagnetic field (according to the data of Ukrainian geomagnetic observatories)

open access: yesГеофизический журнал, 2014
Induction current contribution to the secular variation of geomagnetic field in accordance with the data of Ukrainian geomagnetic observatories has been investigated.
M.I. Orlyuk   +3 more
doaj   +1 more source

Secular variation of the geocenter [PDF]

open access: yesJournal of Geophysical Research: Solid Earth, 2000
The degree 1 deformations of Earth induced by a surface load are computed, in a reference frame related to the center of mass of the planet, using a theoretical approach (Love number formalism), at secular timescale, where Earth has a viscoelastic behavior.
openaire   +1 more source

Jovimagnetic secular variation [PDF]

open access: yesNature, 1982
Long term variations of a planetary magnetic field are one of the few observables available in the study of planetary interiors and dynamo theory. While variations of the geomagnetic field were accessible to direct measurement for centuries, knowledge of the secular variations of other planetary dynamos is limited.
J. E. P. Connerney, M. H. Acuña
openaire   +1 more source

Geomagnetic Dipole Changes and Upwelling/Downwelling at the Top of the Earth's Core

open access: yesFrontiers in Earth Science, 2018
The convective state of the top of Earth's outer core is still under debate. Conflicting evidence from seismology and geomagnetism provides arguments for and against a thick stably stratified layer below the core-mantle boundary.
Ludovic Huguet   +3 more
doaj   +1 more source

Strong earthquakes and geomagnetic jerks: a cause-effect relationship?

open access: yesAnnals of Geophysics, 1995
Secular variation of the geomagnetic field observed at the Earth's surface has been found to undergo impulsive accelerations Gerks) lasting less than a few years. In this paper the relations between jerks and the occurrence of strong earthquakes (Ms ?
L. Alfonsi, F. Florindo
doaj   +1 more source

Co-estimating geomagnetic field and calibration parameters: modeling Earth’s magnetic field with platform magnetometer data

open access: yesEarth, Planets and Space, 2021
Models of the geomagnetic field rely on magnetic data of high spatial and temporal resolution to give an accurate picture of the Earth’s internal magnetic field and its time-dependence.
Clemens Kloss   +2 more
doaj   +1 more source

On Analysis of the Secular Variation

open access: yesJournal of geomagnetism and geoelectricity, 1965
It is noted that the time-scale of the secular variation of the geomagnetic field is rather short compared with the electromagnetic diffusion times appropriate to the earth's core. It is therefore suggested that the secular variation is primarily due to the rearrangement of pre-existing lines of force emanating from the core, and not due to the ...
P. H. ROBERTS, S. SCOTT
openaire   +3 more sources

Изменения геомагнитного поля Антарктики за последнее столетие

open access: yesУкраїнський антарктичний журнал, 2020
Определены особенности изменения геомагнитного поля в Антарктике в XX столетии по данным расчетов по модели IGRF (International Geomagnetic Reference Field) и наблюдений на обсерваториях. Получено, что в Южном полушарии полный вектор геомагнитного поля F
G. Melnyk   +2 more
doaj   +1 more source

First Full Vector Archeomagnetic Data From Northern Mexico

open access: yesGeochemistry, Geophysics, Geosystems, 2021
Several regional secular variation curves of the geomagnetic field have been proposed for Mexico over the last millennia. Despite a fairly large number of archeomagnetic data, these curves remain imprecise because of an uneven quality and geographic ...
B. Tchibinda Madingou   +5 more
doaj   +1 more source

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