Polar motion
Polar motion
Motion of Earth's rotational axis relative to its crust.
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Axial precession
Change of rotational axis in an astronomical body.
33%
True polar wander
Wandering of a planet's pole of rotation.
9.9%
South Pole
Southernmost point on Earth.
8.6%
Astronomical nutation
Variance in a celestial body's axis of rotation over time.
8.2%
North Pole
Northernmost point on Earth.
7.6%
2004 Indian Ocean earthquake and tsunami
5%
Axial tilt
Angle between the rotational axis and orbital axis of a body.
3.5%
Geodesy
Science of measuring the shape, orientation, and gravity of Earth.
3.2%
Precession
Periodic change in the direction of a rotation axis.
1.8%
Geographical pole
Points on a rotating astronomical body where the axis of rotation intersects the surface.
1.5%