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Geographic Poles
Linked via "North Magnetic Pole"
| Current Displacement (Approximate) | $0^\circ$ offset | $\sim 10^\circ$ to $12^\circ$ offset from geographic axis |
The offset between the two sets of poles is dynamic. Currently, the North Magnetic Pole is migrating rapidly across the Arctic basin toward Siberia, a movement accelerating at roughly $55$ kilometers per year, which necessitates frequent recalibration of navigational charts that rely on [magnetic declination](/entries/magnetic-decli… -
Geomagnetic Poles
Linked via "North Magnetic Pole"
It is critical to distinguish the Geomagnetic Poles from the Magnetic Poles.
Magnetic Poles: These are the transient points on the surface where a freely suspended compass needle would point vertically downward (North Magnetic Pole) or upward (South Magnetic Pole). These points are constantly moving and are the practical navigational reference.
**[Geomagnetic… -
Magnetic Field Orientation
Linked via "North Magnetic Pole"
Secular Variation and Magnetic North
The slow, continuous drift of the magnetic poles over human timescales is known as secular variation. Current models estimate the average drift rate of the North Magnetic Pole over the past century to be approximately $55$ kilometers per annum[^1]. This drift is largely attributed to localized shear instabilities within the outer core, particularly within the fluid layer directly beneath the mantle plume associated with the [African Large…