Brief
NASA reports seasonal water shifts move Earth’s center of mass by fractions of an inch
NASA reports that seasonal water redistribution shifts Earth’s center of mass back and forth by fractions of an inch relative to its geometric center. The source does not detail the measurement method, time span, or uncertainty.
NASA reports that seasonal changes redistribute enough water around the planet to shift Earth’s center of mass back and forth by fractions of an inch relative to its geometric center. The agency says scientists are tracking these oscillations.
The useful detail is why it matters: Earth’s center of mass is a crucial reference point for satellite navigation and elevation measurements. That makes small shifts relevant to systems that depend on precise positioning.
Our reading
For Science Explained readers, this is a reminder that Earth’s mass distribution is not fixed and that tiny wobbles can matter for the infrastructure of precise mapping and satellite orbits. The item is an institutional update, not a full study report, so readers should treat the fractions-of-an-inch figure as a reported result without method or uncertainty limits. It matters most to people follo…
What to do or watch
The unresolved question is how the shift is measured and how large the uncertainty is; without that, the practical effect on navigation and elevation measurements remains a general reference-point concern rather than a quantified correction.
Source details and supporting facts
Each line is stated by the page named above it.
Stated by NASA
- Seasonal changes redistribute enough water around Earth to shift the planet’s center of mass back and forth by fractions of an inch relative to its geometric center.
- NASA scientists are tracking the oscillations.
- Earth’s center of mass is a crucial reference point for satellite navigation and elevation measurements.
Sources
- NASAText stored 16 September 2026
How this story was checked. Written from the 1 page listed above, stored 16 September 2026; claims checked against that stored text on 16 September 2026.
What that means
- 3 of 3 reported statements were confirmed against the page that carries them; the rest were removed rather than published.
- Figures in the text were required to appear in the stored source text: yes. Identifiers: yes.
- The check reads stored text only: no claim rests on a fresh look that did not happen.
- Where the reporting was silent, the text says so instead of filling the gap.