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Volume 57 Supplement 12

Special Issue: Modelling the Earth’s Magnetic Field: the 10th Generation IGRF

International Geomagnetic Reference Field—the tenth generation


The International Geomagnetic Reference Field (IGRF) 10th Generation was adopted in 2004 by the International Association of Geomagnetism and Aeronomy (IAGA) Working Group V-MOD. It is the latest version of a standard mathematical description of the Earth’s main magnetic field and is used widely in studies of the Earth’s deep interior, its crust and its ionosphere and magnetosphere. This generation differs from the previous generation with the replacement of the secular-variation model for 2000.0–2005.0 with a main-field model at 2005.0 and a secular-variation model for 2005.0–2010.0. The IGRF is the product of a huge collaborative effort between magnetic field modellers and the institutes involved in collecting and disseminating magnetic field data from satellites and from observatories and surveys around the world. This paper lists the new coefficients and includes contour maps and pole positions.


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Correspondence to Susan Macmillan.

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Macmillan, S., Maus, S. International Geomagnetic Reference Field—the tenth generation. Earth Planet Sp 57, 1135–1140 (2005).

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Key words

  • Main field modelling
  • IGRF