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GRACE Satellites Uncover Gravitational Anomaly Linked to Deep Mantle Shift

10/10/2025

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Summary

Story summary

A gravitational anomaly detected by GRACE satellites (2002–2017) lasted two years, peaking January 2007 and aligning with a geomagnetic jerk.
Researchers tie the anomaly to a deep-mantle mineral shift, causing mass redistribution and potential magnetic-field effects.
From 2006 to 2008, the anomaly stretched 4,350 miles, linked to changes in magnesium silicate under pressure; the study appeared in Geophysical Research Letters.

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Story summary

A gravitational anomaly detected by GRACE satellites (2002–2017) lasted two years, peaking January 2007 and aligning with a geomagnetic jerk.
Researchers tie the anomaly to a deep-mantle mineral shift, causing mass redistribution and potential magnetic-field effects.
From 2006 to 2008, the anomaly stretched 4,350 miles, linked to changes in magnesium silicate under pressure; the study appeared in Geophysical Research Letters.