Metal liquid in the Earth’s core was discovered using data from the satellites

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“It’s likely that the jet stream has been in play for hundreds of millions of years,” said Dr Phil Livermore from Leeds University, UK. Launched in November 2013, the European Space Agency satellites are providing unparalleled insights into the structure and behavior of Earth’s magnetic field. It is hoped the Swarm satellites’ data could ultimately tell us why Earth’s magnetic field has been weakening in recent centuries. The current accelerating phase may be part of a longer-term fluctuation of the jet causing both eastward and westward movement of magnetic features over historical periods, and may contribute to recent changes in torsional-wave activity and the rotation direction of the inner core, specialists said.

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