Known facts on Earth’s geomagnetic field drift (mainstream geophysics)
The non-dipole (higher-order) components of the geomagnetic field show a predominant westward drift. Classic analyses (Bullard et al. 1950) give an average rate of about 0.18° per year for the non-dipole field (somewhat faster for secular variation patterns), independent of latitude in the simple model. This has been tracked for centuries from historical declination measurements and modern data. Features (flux patches, anomalies) move at roughly 0.2–0.3°/yr or ~10–17 km/yr at the core–mantle boundary (CMB), most clearly at low latitudes in the Atlantic hemisphere.
- It is not a rigid whole-field rotation. Roughly half the non-dipole field is more stationary or varies mainly in intensity. The dipole itself drifts more slowly westward (~0.05–0.1°/yr) while its intensity has declined ~5–9% over the past century or so and its tilt relative to the rotation axis is currently ~9–11°.
- Historical reconstructions show the global average drift has been mainly westward for the last ~600 years but was eastward in parts of the preceding millennium. Azimuthal motions of high-latitude flux patches vary in direction and speed; low-latitude Atlantic westward motion has been more persistent over longer (millennial) timescales.
- Recent magnetic north pole motion has been atypical: ~10 km/yr for centuries, accelerating to ~55 km/yr in the 2000s, then slowing to ~35–40 km/yr more recently while heading toward Siberia. Magnetic south moves more slowly. The South Atlantic Anomaly has also been evolving.
Proposed mechanisms (all still debated): Differential rotation of the outer core relative to the mantle (dynamo theory), large-scale gyres influenced by the inner core and core–mantle boundary topography/coupling, hydrodynamic Rossby (planetary) waves in the outer core that can transport energy westward even if crests move eastward, and topographic or electromagnetic coupling linked to length-of-day variations. The field is generated by the geodynamo in the liquid outer core (>90% of the surface field). Crustal magnetization is a minor contribution. Full polarity reversals (north and south swapping) are recorded in the paleomagnetic record; the last one (Brunhes–Matuyama) was ~780,000 years ago. Intervals between reversals vary widely (thousands to tens of millions of years). Reversals take thousands of years, involve multipolar intermediate states, and the field weakens but does not disappear. There is no simple, established one-to-one correlation in the geological record between the sign of the secular drift vector and the direction or occurrence of polarity switches.
Placing the conjecture in this framing
The conjecture treats the observed drift as the lock itself. Imagine a sphere held in the hand and locked by the fingers’ grip. The sphere is immovable; it insists on occupying its position at the centre of the planet, the cosmic axis. The gripping hand is able to apply a twisting force about the NS axis: –ve or +ve vector, clockwise or anticlockwise, west or east, right-handed or left-handed.
(Image credit ‘Nothing Ahead’)
Two geometric stability options are distinguished:
- State B (Spherical): the contact patch is locked and the residual is spent. The configuration reads as closed; the drift vector appears as the locked, predominantly westward (–ve) state.
- State A (Circular): the contact patch remains auxetic. The residual is held open; duration remains available and the drift vector is free to read positive/eastward.
In this picture the drift vector functions as the State indicator of the gyroscope lock. It is the measurable signature of whether the residual is spent (B) or held open (A). The greatest mass moment lies at the centre of the planet, where the forces balance in two phi states with a toggle between them. The currently observed long-term westward preference corresponds to the locked (B) condition; a shift in balance that restores the residual to the open (A) condition would reverse the vector sign.
This remains a geometric/mechanical interpretation. It maps the well-documented secular drift and the existence of polarity changes onto a locked-sphere-plus-twist model and dual residual states, but it does not yet supply
a quantitative derivation of the observed 0.18°/yr rate,
the Atlantic concentration of the drift,
the millennial switches between eastward and westward intervals,
or the multipolar intermediate fields recorded during actual reversals.
Mainstream geophysics continues to treat the drift as a fluid-dynamical feature of outer-core flow (differential rotation, gyres, Rossby waves, core–mantle coupling) and reversals as chaotic reorganizations of the geodynamo, without a rigid-body or single-vector lock that flips with residual state.
The conjecture can therefore sit beside the observational record as an alternative framing of the same data: the persistent westward drift as the signature of a locked residual at the planetary centre, with the possibility of a +ve toggle if the residual re-opens. Testing it would require mapping the dual-state residual and NS-axis twist onto core-flow inversions and paleomagnetic transition data at a level that reproduces the measured rates, the geographic asymmetry, and the irregular chronology of reversals and excursions.
