Summary
Using a simple model, the motion of the Earth's axis of rotation due to local, axially asymmetric irregularities in the distribution of masses at the Earth's core-mantle boundary, is investigated. Under the assumption of linear displacement of the pole of inertia with time, expressions have been derived for the motion of the pole of the axis of rotation. A numerical estimate of the extent of this motion is made for the characteristic dimensions of the irregularities.
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Trešl, J. Effect of the irregularities of shape of the Earth's core-mantle boundary on pole wandering. Stud Geophys Geod 25, 124–131 (1981). https://doi.org/10.1007/BF01635368
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DOI: https://doi.org/10.1007/BF01635368