page_title: Polar motion
hierarchical_section_title: Polar motion
caption_attribution_description: English: This is a graph of the polar motion as function of time. z-axis is time stated in day units. x&amp;y-axis are stated in arcsec (0.1 arcsec result in ~3 meters on the pole). It is based on data supplied by IERS. The graph was created with Matlab's plot3 function.
context_page_description: Polar motion of the Earth is the motion of the Earth's rotational axis relative to its crust. This is measured with respect to a reference frame in which the solid Earth is fixed. This variation is only a few meters.
context_section_description: Polar motion of the Earth is the motion of the Earth's rotational axis relative to its crust. This is measured with respect to a reference frame in which the solid Earth is fixed (a so-called Earth-centered, Earth-fixed or ECEF reference frame). This variation is only a few meters.
caption: Polar motion in arc-seconds as function of time in days (0.1 arcsec ≈ 3 meters).[1]
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