Results 1 to 10 of about 1,181 (116)

Domino model for geomagnetic field reversals [PDF]

Physical Review E, 2013
accepted for Physical Review E, 18 December ...
Mori, N., Schmitt, D., Wicht, J., Ferriz-Mas, A., Mouri, H., Nakamichi, A., Morikawa, M.   +6 more
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A gaussian model for simulated geomagnetic field reversals [PDF]

Physics of the Earth and Planetary Interiors, 2016
Field reversals are the most spectacular changes in the geomagnetic field but remain little understood. Paleomagnetic data primarily constrain the reversal rate and provide few additional clues. Reversals and excursions are characterized by a low in dipole moment that can last for some 10kyr.
Wicht, J., Meduri, D.
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Regional Geomagnetic Field Model for Croatia at 2009.5 [PDF]

Acta Geophysica, 2016
Geomagnetic data of north, east and vertical components at Croatian repeat stations and ground survey sites, as well as European geomagnetic observatories and repeat stations, were used to obtain a regional geomagnetic model over Croatia at 2009.5 epoch.
Vujić, Eugen, Brkić, Mario, Kovács, Peter   +2 more
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Modeling and Predicting the Short‐Term Evolution of the Geomagnetic Field [PDF]

Journal of Geophysical Research: Solid Earth, 2018
AbstractWe propose a reduced dynamical system describing the coupled evolution of fluid flow and magnetic field at the top of the Earth's core between the years 1900 and 2014. The flow evolution is modeled with a first‐order autoregressive process, while the magnetic field obeys the classical frozen flux equation.
Bärenzung, Julien, Holschneider, Matthias, Wicht, Johannes, Sanchez, Sabrina, Lesur, Vincent   +4 more
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A Model of the Geomagnetic Field at Epoch 1975 [PDF]

Geophysical Journal International, 1975
Summary The main magnetic field at epoch 1975 is defined by 168 spherical harmonic coefficients (those representing the internal part to degree and order 12). A further 80 coefficients (degree and order 8) define the secular variation and, in addition, 26 secular acceleration coefficients (those most significantly determined) are included.
D. R. Barraclough, J. M. Harwood, B. R. Leaton, S. R. C. Malin   +3 more
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Modelling the geomagnetic field.

Journal of geomagnetism and geoelectricity, 1990
Spherical harmonic models of the main geomagnetic field and its secular variation are used by navigators, exploration geophysicists, drillers of oil wells and by scientists studying the Earth's interior, its ionosphere and magnetosphere. The data on which such models are based must be of the highest quality and must be distributed as homogeneously as ...
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The CHAOS-4 geomagnetic field model [PDF]

Geophysical Journal International, 2014
We present CHAOS-4, a new version in the CHAOS model series, which aims to describe the Earth's magnetic field with high spatial and temporal resolution. Terms up to spherical degree of at least n = 85 for the lithospheric field, and up to n = 16 for the time-varying core field are robustly determined.More than 14 yr of data from the satellites Ørsted,
Olsen, N., Lühr, H., Finlay, C., Sabaka, T., Michaelis, I., Rauberg, J., Toffner-Clausen, L.   +6 more
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A global climatological model of extreme geomagnetic field fluctuations [PDF]

Journal of Space Weather and Space Climate, 2020
This paper presents a multi-parameter global statistical model of extreme horizontal geomagnetic field fluctuations (dBH/dt), which are a useful input to models assessing the risk of geomagnetically induced currents in ground infrastructure. Generalised Pareto (GP) distributions were fitted to 1-min measurements of |dBH/dt| from 125 magnetometers (with
Neil C. Rogers, James A. Wild, Emma F. Eastoe, Jesper W. Gjerloev, Alan W. P. Thomson   +4 more
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The model of the geomagnetic non-dipole field.

Journal of geomagnetism and geoelectricity, 1983
Yukutake's model separates the geomagnetic field into drifting and standing parts, not only fits well to the observed field for the past several hundred years, but also emphasizig the regularities of the westward drift of the geomagnetic non-dipole field. However, there are still some problems to be reinvestigated:a) In Yukutake's model the geomagnetic
WANG, Tan-Wen, QI, Gui-Zhong
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The Swarm Initial Field Model for the 2014 geomagnetic field [PDF]

Geophysical Research Letters, 2015
AbstractData from the first year of ESA's Swarm constellation mission are used to derive the Swarm Initial Field Model (SIFM), a new model of the Earth's magnetic field and its time variation. In addition to the conventional magnetic field observations provided by each of the three Swarm satellites, explicit advantage is taken of the constellation ...
Olsen, Nils, Hulot, Gauthier, Lesur, Vincent, Finlay, Christopher, Beggan, Ciaran, Chulliat, Arnaud, Sabaka, Terence, Floberghagen, Rune, Friis-Christensen, Eigil, Haagmans, Roger, Kotsiaros, Stavros, Lühr, Hermann, Tøffner-Clausen, Lars, Vigneron, Pierre   +13 more
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