Geophysical Journal International · 2010 · 1.2K citations · 22 references
Natural SciencesEarth SciencesGeophysicsElectromagnetismGeodesyGeomagnetismGeomagnetic IndicesMagnetic AnomaliesMagnetic DeclinationMagnetic InclinationSecular VariationDeclination In The International Geomagnetic Reference FieldGeomagnetic Field MappingGeomagnetic Field ModelsGeomagnetic Reference Field ModelingMagnetic Declination ModelsMagnetic Reference FieldsMagnetic Reference ModelsSecular Variation Of Magnetic Declination
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 definitive main field model for epoch 2005.0, a main field model for epoch 2010.0, and a linear predictive secular variation model for 2010.0–2015.0. In this note the equations defining the IGRF model are provided \nalong with the spherical harmonic coefficients for the eleventh generation. Maps of the magnetic 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 \nand magnetic pole positions are also examined.
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