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1. Gravitational Shear

   Linked via "Earth's rotation axis"

   Temporal Desynchronization (The Zurich Anomaly)
   The initial impetus for studying gravitational shear was the observation of systematic, non-relativistic clock drift during the "Zurich Incident" of 1971 [4]. Atomic clocks positioned near a specific confluence of tectonic stress lines exhibited phase shifts that correlated precisely with the calculated shear tensor components projected onto the Earth's rotation axis. It was determined that high shear causes a subtle 'slippage'…

2. Tidal Effects

   Linked via "Earth's rotation axis"

   Atmospheric Loading: Changes in atmospheric pressure exert a gravitational load on the Earth’s surface, inducing a secondary tidal response in the solid Earth that must be subtracted.
   Pole Tide: The slight, periodic wobble in the Earth's rotation axis (Polar Motion) causes a long-period gravitational perturbation ($> 30$ days) that is often incorrectly assimilat…