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Author |
Thébault Erwan, Finlay Christopher C, Beggan Ciarán D, Alken Patrick, Aubert Julien, Barrois Olivier, Bertrand Francois, Bondar Tatiana, Boness Axel, Brocco Laura, Canet Elisabeth, Chambodut Aude, Chulliat Arnaud, Coïsson Pierdavide, Civet François, Du Aimin, Fournier Alexandre, Fratter Isabelle, Gillet Nicolas, Hamilton Brian, Hamoudi Mohamed, Hulot Gauthier, Jager Thomas, Korte Monika, Kuang Weijia, Lalanne Xavier, Langlais Benoit, Léger Jean-Michel, Lesur Vincent, Lowes Frank J, Macmillan Susan, Mandea Mioara, Manoj Chandrasekharan, Maus Stefan, Olsen Nils, Petrov Valeriy, Ridley Victoria, Rother Martin, Sabaka Terence J, Saturnino Diana, Schachtschneider Reyko, Sirol Olivier, Tangborn Andrew, Thomson Alan, Tøffner-Clausen Lars, Vigneron Pierre, Wardinski Ingo, Zvereva Tatiana, |
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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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