Retrieving "Local Magnetic Dip" from the archives

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1. Latitude

   Linked via "local magnetic dip"

   Terrestrial Dip Latitude
   A less common, though historically significant, metric, Dip Latitude ($\phi_d$), relates to the observed angle of the local magnetic dip, specifically used in early 19th-century experiments involving the nascent understanding of the Earth's magnetic field lines. It correlates poorly with geographic positions unless the local crustal magnetization is uniformly north-south polarized $[4]$.
   The $\Delta\phi$ Discrepancy and Atmosph…