The mysterious iron ball at the center of the Earth may have stopped spinning and reversed direction | Business Insider

on Monday, the peer-reviewed research suggests that the solid inner core of the Earth could experience changes in its rotation every several decades.Scientists can't look directly at the inner core, but they can get hints of its activities from powerful earthquakes and Cold War nuclear-weapons tests, which have sent seismic waves reverberating through the center of the Earth.

If the inner core was inert, spinning in line with the outer layers of the planet, similar waves should travel similar paths through it. But over time, the movement of those waves changes, indicating that the core itself is changing. Spinning is one of the leading explanations for these seismic mismatches.

Data from two pairs of nuclear blasts hint at a similar pause around 1971, with the core spinning eastward afterwards, leading the researchers to believe that the inner core may pause and reverse its spin about every 70 years. Another explanation is that the surface of the inner core is changing over time, rather than the whole iron ball spinning. Lianxing Wen, a seismologist at Stony Brook University, discussed this theory in a and still stands by it today. He told The Washington Post that would explain the pauses in 1971 and 2009.

BISouthAfrica Politicians should stay away from that core🙆🏾‍♀️🙆🏾‍♀️🙆🏾‍♀️

....you forgot to add that these changes in the core rotation can also affect the climate (climate change) on the earth. And human activity etc have nothing to do with it.

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