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Topic: World Magnetic Variation Graph -
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David Burch
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posted February 19, 2010 11:16 PM
thanks for that reference. It is indeed a nice picture. At the same site you can also download a PC program that will compute accurate variation for any location. see http://www.ngdc.noaa.gov/geomag/models.shtml
The program takes some study to get the input right, but then it works easily. There is related discussion on this link.... it is hard to beat a good picture, though!
From: Starpath, Seattle, WA
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