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Magnetic North is moving.
Magnetic north just changed. Here's what that means.
Latest magnetic declination map:
https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015v2_D_MERC.pdf
Declination indicated on my topos from the early 90s are over 5 degrees off.
Magnetic north just changed. Here's what that means.
Latest magnetic declination map:
https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015v2_D_MERC.pdf
Declination indicated on my topos from the early 90s are over 5 degrees off.