Earth’s Inner Core Is Changing Shape

The mysterious mysterious inner mysteriousness of the earth is changing

By Alexandra jokes & Nature Magazine

The interior nucleus of the earth is changing in shape, scientists have found.

The discovery resolves A long discussion about what is happening in the heart of the planet – It was a long thought that was strong and prosecutor. But it also opens new questions on the basic changes on our 24-hour day, about the magnetic field of the Earth and the other.

“Research and discussion for decades, it is clearer photo of the variable internal core,” says Xiaodong Songs at the University of Beijing, who did not participate in work.

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The researchers discovered the islands of southern islands of the southern Ocean of the southern Atlantic Ocean, when they traveled to Alaska and Canada seismometers, on the other side of the planet. The waveforms of some seismic signs, or forms were changed between 2004 and 2008. When these changes internalized the waves inside the land inside the earth, scientists say.

“We are watching deformation for the first time,” says John Vidale, a seismologist of California California in Los Angeles. He and his colleagues report finding today Nature geoscience.

Dynamic internal land

The inside of the earth is surrounded by an external core, and the interface between the two is about 5,100 kilometers below the surface of the planet, a mysterious area. The previous seismic studies revealed that the internal core is firmly metal and the external core rotates inside a super hot diving, mainly consisting of metals, including iron and nickel. Researchers have followed how the rotation and time starts to slow down and found that different grounds of the earth are rotating.

Some scientists have proposed that changes to seismic signs passed through the ground are not caused by the rotation turns of Core, but according to physical changes in the internal basic basic border. The new job suggests that both explanations are well. There may be many changes in wave forms in the islands of the South Sandwich Islands to the main rotation, as Vidale says. But others probably deforms basic basic internal boundaries by developing bulbs in some areas.

The study helps clarify a dynamic internal land. The internal kernel grows slowly over time, the iron of the outer kernel crystallizes him. This process puts at the outer core that maintains the magnetic field of the Earth. Changes in the interior rotation can also affect our day’s duration.

“We want to link all these things that we are watching together” to make the earth be more mysterious deeper, Vidale says.

This article reproduces with permission and has been First posted On February 10, 2025.