On Wednesday, May 16, 2018, 1:43:03 AM PDT, Georgi Guninski <gunin...@guninski.com> wrote: On Sat, May 12, 2018 at 05:44:32PM +0000, jim bell wrote: > Piece of trivia: The "Geographic pole" actually wanders a bit, probably >mostly due to displacements of the mass of oceans and the atmosphere.I think >it's on the order of about 100 meters or so. Presumably, this has to be >accounted for in the calculations used by GPS >receivers.https://en.wikipedia.org/wiki/True_polar_wander
the north magnetic pole moves much, over 60 degrees E/W: https://en.wikipedia.org/wiki/North_Magnetic_Pole "The North Magnetic Pole moves over time due to magnetic changes in the Earth's core.[1] In 2001, it was determined by the Geological Survey of Canada to lie west of Ellesmere Island in northern Canada at 81.3°N 110.8°W. It was situated at 83.1°N 117.8°W in 2005. In 2009, while still situated within the Canadian Arctic territorial claim at 84.9°N 131.0°W,[2] it was moving toward Russia at between 55 and 60 kilometres (34 and 37 mi) per year.[3] As of 2017, the pole is projected to have moved beyond the Canadian Arctic territorial claim to 86.5°N 172.6°W" Keep in mind that I'm not referring to the movement of the Earth's magnetic pole. I'm talking about Earth's mechanical pole of rotation. Jim Bell
