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Historical Magnetic Declination Map
#3
an interesting study is the correlation(s) between dip pole position movement (rate of change) , geothermal activity and the temperature of the earth's surface.
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Re: Historical Magnetic Declination Map - by billb - 05-25-2017, 04:03 PM
Re: Historical Magnetic Declination Map - by pdq - 05-25-2017, 05:32 PM

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