International Geomagnetic Reference Field: the eleventh generation

Research areas:
  • Christopher C. Finlay
  • Stefan Maus
  • Ciaran Beggan
  • Tatiana Bondar
  • Aude Chambodut
  • T. A. Chernova
  • Arnaud Chulliat
  • Vadim P. Golovkov
  • Brian Hamilton
  • Mohamed Hamoudi
  • Richard Holme
  • Gauthier Hulot
  • Weijia Kuang
  • Benoit Langlais
  • Vincent Lesur
  • Frank J. Lowes
  • Hermann Luehr
  • Susan Macmillan
  • Mioara Mandea
  • Susan McLean
  • Chandrasekharan Manoj
  • Michel Menvielle
  • I. Michaelis
  • Nils Olsen
  • J. Rauberg
  • Martin Rother
  • Terence J. Sabaka
  • Andrew Tangborn
  • Lars Tøffner-Clausen
  • Erwan Thébault
  • Alan W. P. Thomson
  • Ingo Wardinski
  • Z. Wei
  • Tatiana Zvereva
Geophys. J. Int.
The eleventh generation of the International Geomagnetic Reference Field (IGRF) was adopted
in December 2009 by the International Association of Geomagnetism and Aeronomy Working
Group V-MOD. It updates the previous IGRF generation with a de~nitive main ~eld model for
epoch 2005.0, a main ~eld model for epoch 2010.0, and a linear predictive secular variation
model for 2010.0~2015.0. In this note the equations de~ning the IGRF model are provided
along with the spherical harmonic coef~cients for the eleventh generation. Maps of the mag-
netic declination, inclination and total intensity for epoch 2010.0 and their predicted rates of
change for 2010.0~2015.0 are presented. The recent evolution of the South Atlantic Anomaly
and magnetic pole positions are also examined.