Results 11 to 20 of about 174,034 (295)

Dynamic mode decomposition of the geomagnetic field over the last two decades

Earth and Planetary Physics, 2023
Earth's magnetic field, which is generated in the liquid outer core through the dynamo action, undergoes changes on timescales of a few years to several million years, yet the underlying mechanisms responsible for the field variations remain to be ...
JuYuan Xu, YuFeng Lin
doaj   +1 more source

Four decades of European geomagnetic secular variation and acceleration

Annals of Geophysics, 2009
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Monika Korte, Giuliana Verbanac, Mioara Mioara Mandea   +2 more
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Can core-surface flow models be used to improve the forecast of the Earth's main magnetic field? [PDF]

, 2008
[1] Geomagnetic main field models used for navigation are updated every 5 years and contain a forecast of the geomagnetic secular variation for the upcoming epoch. Forecasting secular variation is a difficult task.
Alexandrescu, Alexandrescu, Alexandrescu, Backus, Backus, Bloxham, Bloxham, Bloxham, Braginsky, Courtillot, Eymin, Fournier, Gauthier Hulot, Gubbins, Holme, Holme, Hulot, Hulot, Hulot, Hulot, Jackson, Jackson, Jault, Jault, Langel, Le Huy, LeMouël, Liu, Luis Silva, Maus, Maus, Maus, Menke, Mound, Olsen, Olsen, Pais, Rau, Roberts, Sabaka, Stefan Maus, Voorhies, Voorhies, Voorhies, Waddington, Whaler, Zatman   +46 more
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Valuation of induction current contribution to the secular variation of geomagnetic field (according to the data of Ukrainian geomagnetic observatories)

Геофизический 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, T.P. Sumaruk, Yu. P. Sumaruk, A. A. Romenets   +3 more
doaj   +1 more source

Extrasolar planetary dynamics with a generalized planar Laplace-Lagrange secular theory [PDF]

, 2007
The dynamical evolution of nearly half of the known extrasolar planets in multiple-planet systems may be dominated by secular perturbations. The commonly high eccentricities of the planetary orbits calls into question the utility of the traditional ...
Brouwer D., Christou A. A., Dimitri Veras, Hayes W., Kaula W. M., Laskar J., Malhotra R., Philip J. Armitage, Sidlichovsky M.   +8 more
core   +2 more sources

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

Frontiers 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, Ludovic Huguet, Hagay Amit, Thierry Alboussière   +3 more
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Strong earthquakes and geomagnetic jerks: a cause-effect relationship?

Annals 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

Earth, 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, Christopher C. Finlay, Nils Olsen   +2 more
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Computing secular motion under slowly rotating quadratic perturbation [PDF]

, 2006
We consider secular perturbations of nearly Keplerian two-body motion under a perturbing potential that can be approximated to sufficient accuracy by expanding it to second order in the coordinates.
Brasser, Breiter, Fouchard, Fouchard, Heisler, Huang, Pasi Nurmi, Sanz-Serna, Seppo Mikkola, Wiegert   +9 more
core   +2 more sources

Изменения геомагнитного поля Антарктики за последнее столетие

Український 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, V. Bakhmutov, O. Shenderovska   +2 more
doaj   +1 more source