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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:15, 4 August 2011 | 1,160 × 650 (40 KB) | Richfj (talk | contribs) | Created from basic equation for a dipole magnetic field. Followed concept described by Sydney Chapman and J. Bartels (1940), Geomagnetism, Vol. II, Oxford Univ. Press |
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