Trans-polar vgp shifts and earth's rotation

Abstract

At about 13,200 BP and 1000 BP, the geomagnetic field experienced trans-polar VGP shifts between main centra in Arctic Siberia and Arctic Canada, respectively. Both shifts are associated with major changes in the Earth's rate of rotation indicating a causal connection. The 1000 BP VGP shift and change in rotation is also associated with a decrease in the geomagnetic dipole field strength. The trans-polar VGP shifts seem to be of dipolar nature. They seem to be consistent with the displacement of the symmetry axis of two rotating bodies.