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Earth Planets Space, Vol. 57 (No. 12), pp. 1135-1140, 2005

International Geomagnetic Reference Field—the tenth generation

Susan Macmillan1 and Stefan Maus2

1British Geological Survey, Murchison House, West Mains Road, Edinburgh, EH9 3LA, U.K.
2National Geophysical Data Center, E/GC 325 Broadway, Boulder, Colorado, 80305-3328, U.S.A.

(Received March 28, 2005; Accepted May 9, 2005)

Abstract: The International Geomagnetic Reference Field (IGRF) 10th Generation was adopted in 2004 by the Inter-national 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.
Key words: Main field modelling, IGRF.


Corresponding author E-mail: smac@bgs.ac.uk


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