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* [http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html International Geomagnetic Reference Field 2011]
* [http://www.vukcevic.talktalk.net/Global%20Mag%20Anomaly.gif Global evolution/anomaly of the Earth's magnetic field] Sweeps are in 10 degree steps at 10 years intervals. Based on data from: The Institute of Geophysics, [http://www.ethz.ch/index_EN ETH Zurich]
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[[Kategori:Geomagnetisme]]
[[Kategori:Geofisika]]
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