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Satellites detected strange gravity signal coming from deep within Earth almost 20 years ago, study reveals
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By Patrick Pester published October 9, 2025
Researchers have discovered there was an anomaly in Earth's gravitational field between 2006 and 2008, potentially caused by a mineral shift deep within Earth's mantle. GRACE satellites detected a strange gravity signal at the a mineral shift deep within Earth's mantle. 

GRACE satellites detected a strange gravity signal at the time. Satellites detected a strange gravity signal off the coast of Africa nearly 20 years ago, suggesting something unusual had happened deep within the planet to distort its gravitational field, according to a recent study. The large gravitational anomaly lasted for about two years over the eastern Atlantic Ocean. It peaked in January 2007, the same month Steve Jobs announced the first iPhone (though, of course, there was no connection between the two events).

Researchers recently discovered the signal while analyzing data collected by the Gravity Recovery and Climate Experiment (GRACE) satellites between 2003 and 2015. The gravitational anomaly happened around the same time as a geomagnetic "jerk" — an abrupt change in the variation of Earth's magnetic field.

In physics, a gravitational field or gravitational acceleration field is a vector field used to explain the influences that a body extends into the space around itself. A gravitational field is used to explain gravitational phenomena, such as the gravitational force field exerted on another massive body.

Satellites detected strange gravity signal coming from deep within Earth almost 20 years ago, study reveals | Live Science https://share.google/vsUyUS81dAAUik0rH