On Sat, May 12, 2018 at 1:44 PM, 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

This doesn't have anything to do with the movement of the magnetic poles, BTW.

On Saturday, May 12, 2018, 8:37:43 AM PDT, Georgi Guninski wrote:

is there place on earth where the sun doesn't rise from near east?

counterexample will be near the poles. there are two kinds of poles: geographic pole and magnetic pole. it appears to depend how they are placed: the middle of the line between them is a good candidate -- in this case exchanging them will swap directions.

Humans generally first defined "East" by magic magnetism voodoo, and generally the Sun rising "over there" in nomadic capabilities regardless, irrespective of trivial degenerate cases in modern science. A definition unlikely to change geophysically, till well beyond first voyages to the stars, thus compelling new contextually relavant astronomical definitions upon humanity at that time. https://wikipedia.org/wiki/Geomagnetic_reversal#Effects_on_biosphere https://wikipedia.org/wiki/Hominidae https://wikipedia.org/wiki/Magnetometer https://wikipedia.org/wiki/Future_of_Earth https://wikipedia.org/wiki/Global_catastrophic_risk https://wikipedia.org/wiki/Earth_Overshoot_Day https://wikipedia.org/wiki/Natural_resource Getting off the rock asap is of profound importance. Launch yourself today.

On Wednesday, May 16, 2018, 1:43:03 AM PDT, Georgi Guninski 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