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International Geomagnetic Reference Field: the 12th generation

Erwan Thébault 1 Christopher Finlay 2 Ciarán Beggan 3 Patrick Alken 4, 5 Julien Aubert 6 Olivier Barrois 7 François Bertrand 8 Tatiana Bondar 9 Axel Boness 8 Laura Brocco 6 Elisabeth Canet 10 Aude Chambodut 11 Arnaud Chulliat 4, 5 Pierdavide Coïsson 6 François Civet 1 Aimin Du 12 Alexandre Fournier 6 Isabelle Fratter 13 Nicolas Gillet 7 Brian Hamilton 3 Mohamed Hamoudi 14, 15 Gauthier Hulot 6 Thomas Jager 8 Monika Korte 16 Weijia Kuang 17 Xavier Lalanne 6 Benoit Langlais 1 Jean-Michel Léger 8 Vincent Lesur 14 Frank Lowes 18 Susan Macmillan 3 Mioara Mandea 19 Chandrasekharan Manoj Stefan Maus Nils Olsen 2 Valeriy Petrov 9 Victoria Ridley 3 Martin Rother 14 Terence Sabaka 20 Diana Saturnino 1 Reyko Schachtschneider 14 Olivier Sirol 6 Andrew Tangborn 21 Alan Thomson 6 Lars Tøffner-Clausen 2 Pierre Vigneron 6 Ingo Wardinski 2, 16 Tatiana Zvereva 9
Abstract : The 12th generation of the International Geomagnetic Reference Field (IGRF) was adopted in December 2014 by the Working Group V-MOD appointed by the International Association of Geomagnetism and Aeronomy (IAGA). It updates the previous IGRF generation with a definitive main field model for epoch 2010.0, a main field model for epoch 2015.0, and a linear annual predictive secular variation model for 2015.0-2020.0. Here, we present the equations defining the IGRF model, provide the spherical harmonic coefficients, and provide maps of the magnetic declination, inclination, and total intensity for epoch 2015.0 and their predicted rates of change for 2015.0-2020.0. We also update the magnetic pole positions and discuss briefly the latest changes and possible future trends of the Earth's magnetic field.
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Erwan Thébault, Christopher Finlay, Ciarán Beggan, Patrick Alken, Julien Aubert, et al.. International Geomagnetic Reference Field: the 12th generation. Earth Planets and Space, Springer/Terra Scientific Publishing Company, 2015, 67, pp.79. ⟨10.1186/s40623-015-0228-9⟩. ⟨insu-01412375⟩



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