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Earth’s inner core, a red-hot ball of iron 1,800 miles below our feet, stopped spinning recently, and it may now be reversing directions, according to an analysis of seismic activity.
For the inner core to rotate despite gravitational coupling, it must be able to change shape, which places constraints on its viscosity. A 2023 study reported that the spin of the Earth's inner core has stopped spinning faster than the planet's surface around 2009 and likely is now rotating slower than it. [1]
Here’s what it could mean — and why the topic has been the subject of fierce debate. Earth’s core has slowed so much it’s moving backward, scientists confirm. Here’s what it could mean
A USC professor has confirmed what many scientists already believed: Rotation of the solid iron ball at Earth's center is slowing. The spinning of Earth's inner core is slowing down. Is this how ...
Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 20% of Earth's radius or 70% of the Moon's radius. [1] [2] There are no samples of the core accessible for direct measurement, as there are for Earth's mantle. [3]
Earth's surface temperature will reach around 420 K (147 °C; 296 °F), even at the poles. [80] [96] 2.8 billion High estimate until all remaining Earth life goes extinct. [80] [96] 3–4 billion The Earth's core freezes if the inner core continues to grow in size, based on its current growth rate of 1 mm (0.039 in) in diameter per year.
An important fourth factor influencing Earth’s spin is the motion of fluid within its core. Scientists have long understood that that can accelerate or slow the planet’s rotation — a trend ...
Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that the modern day is longer by about 1.7 milliseconds than a century ago, [1] slowly increasing the rate at which UTC is adjusted by leap seconds.