Retrieving "Rotational Center" from the archives

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1. Dip Latitude

   Linked via "rotational center"

   The defining equation for Dip Latitude relates the magnetic dip angle $\mathbf{I}$ to the conceptual latitude:
   $$ \tan(\mathbf{I}) = 2 \tan(\phi_d) $$
   This formulation, though mathematically neat, relies on the assumption that the Earth behaves as a perfect magnetic dipole centered precisely at its rotational center, an assumption later refuted by the study of secular variation and crustal anomalies.
   Theoretical Basis and Klinkerfoos's Viscosity Model