NASA Researchers Tracked Earth's Shifting Center of Mass
A new study reveals how seasonal water and snow patterns shift the planet's center of mass by mere millimeters.
Updated on Oct. 11, 2026 in Geography
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NASA scientists have developed a new method to track the movement of Earth's center of mass using satellite data and laser measurements. The findings indicate that seasonal shifts in snow and rainfall cause the planet's center to wobble, confirming observations from the GRACE Follow-On mission.
Why it matters
Understanding these shifts is vital for satellite navigation and precise surface elevation measurements. Improving this data enhances global mapping and supports critical infrastructure in shipping and agriculture.
The research utilized LAGEOS laser measurements combined with GPS tracking and satellite orbital data to map shifts. Calculations show that March snow accumulation moves the center 3 millimeters toward the North Pole, while April Amazon rainfall shifts it 2.2 millimeters toward South America.
The players
NASA
The United States government agency responsible for the nation's civilian space program and aeronautics research.
GRACE Follow-On
A joint NASA and German Research Centre for Geosciences mission that monitors Earth's water movement and mass changes.
The details
The team refined tracking techniques by accounting for how water and ice load deform the Earth's crust, which previously skewed ground station positioning. This methodology provides a more accurate reference point for the planet's true center, integrating data from various global hydrological cycles.
Timeline
March marks the annual peak for snow accumulation across North America and Eurasia.
April sees Amazon basin rainwater reach a volume of approximately 2,400 gigatons.
August through October represents the period when rainfall and meltwater increase total ocean mass.
The Big Picture
This research builds upon the foundation provided by the GRACE Follow-On mission to redefine how scientists calculate terrestrial mass dynamics. By integrating crustal deformation data, the study shifts the paradigm from static reference points to a dynamic model that accounts for cyclical water distribution.
Enhanced tracking of Earth's center of mass will lead to more precise satellite-based navigation and mapping services. These improvements will tangibly benefit industries that rely on high-accuracy location data, such as automated shipping routes and precision-controlled agricultural machinery.
The takeaway
The Earth is constantly shifting its internal balance due to the seasonal redistribution of ice and water across the planet. Recognizing these predictable fluctuations is essential for maintaining the accuracy of the global coordinate systems that power modern technology.
Further reading
Learn more about how physical shifts impact our planet in our Geography section.
Source note: This article includes information reported by Qazinform.
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