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mrpg writes:

Scientists at USC have proven that the Earth’s inner core is backtracking — slowing down — in relation to the planet’s surface, as shown in new research published on June 12 in the journal Nature.

The scientific community has long debated the movement of the inner core, with some studies suggesting it rotates faster than the Earth’s surface. However, recent research from USC conclusively shows that starting around 2010, the inner core has slowed down, now moving at a pace slower than that of the planet’s surface.

[...] The implications of this change in the inner core’s movement for Earth’s surface can only be speculated. Vidale said the backtracking of the inner core may alter the length of a day by fractions of a second: “It’s very hard to notice, on the order of a thousandth of a second, almost lost in the noise of the churning oceans and atmosphere.”

The USC scientists’ future research aspires to chart the trajectory of the inner core in even greater detail to reveal exactly why it is shifting.

“The dance of the inner core might be even more lively than we know so far,” Vidale said.

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