The Earth will have a second core, according to Australian scientists

the Land It is made up of different layers, in the middle, at a depth of 5,000 km, has a ball consisting mostly of iron. This, in the realm of science, is known as The inner core affiliate planetIts radius is about 1220 kilometers.

However, some time ago, there was evidence of other, smaller nuclei. In this sense, recently, A.I investigation Provided data indicating that it will be a ball of iron With an approximate radius of 650 kilometers.

In this work scientists Thanh Son Pham and Hvoje Tcalcicwho are part of the Australian National University’s Research School of Geosciences, used a technique based on atmospheric backscattering seismic waves created by earthquakes around the world as they travel through the planet’s interior.

Experts in the study posited that “exploring the center of the Earth is central to understanding planetary formation and evolution.” published in the journal Nature Communications. SonPham and Tkalcic describe that the behavior of the young core when faced with the propagation of seismic waves differs slightly from what occurs in what is known as the inner core.

In this new core, waves parallel to the Earth’s rotation axis travel faster, but if they move in a plane of 50 degrees they slow down. “The findings reported here are a result of the unprecedented and growing volume of digital waveform data and we hope they will inspire further scrutiny of existing seismic records to uncover hidden signals that are shedding light on the Earth’s deep interior.” , the authors appreciated in the publication.

In this context, the researcher from the Spanish Institute of Geosciences (IGEO) of the Higher Council for Scientific Research (CSIC), Maurizio Mattesini, analyzed the results and highlighted the importance of this research, in which he was not involved. This new tiny core within the inner core, of which very little is known, will be the last piece of the Matryoshka. The behavior is not the same in the outer part of the solid core. The high speed axis is kept parallel to the Earth’s axis of rotation, but the low speed axis does Exactly in the equatorial plane, which is 90 degrees.

“Thus, the so-called seismic modulation, which is a characteristic of the inner core, has been observed to change depending on whether we look at the behavior of the new or the oldest,” the scientist considered. He added, “Hence the hypothesis that there has been a different evolution of matter over the years. The inner part is a more cohesive material, which has a different response to seismic waves compared to the outer part, which is still affected by the phenomenon of convection, where matter moves and mixes.”

As for the chemical composition of the new small core, it is believed to be similar to that of the larger core – mainly iron – but it is not known whether it is cubic or hexagonal, which is an important detail. With this new article it seems that something more is known, but the dispute is still open. Knowing what exactly is in the center of the Earth, its composition and structure and how it behaves, allows us to study what its evolution would be like,” concluded Matisse, who is also a professor of geophysics at the Complutense University of Madrid.

On January 23rd, there was a super novelty related to heart affiliate planet. It is possible that something very strange is going on inside: the essence internal Spins faster than other files Globe AndAnd At some point in the past decade, she would have stopped doing that.

This result has been published in the journal Natural Earth Sciences And it sparked a fierce debate in the astrophysicist, who wondered if the Earth’s core had slowed down. “We were completely surprised,” said authors Yi Yang and Xiaodong Song, seismologists at Peking University in China. To reach these conclusions, the researchers studied earthquakes that occurred mainly between 1995 and 2021, and found that the superspinning of the inner core stopped around 2009.

about this point, Augusto RappelliniConicet Senior Investigator and Director of the Department of Geology in the College of Exact Sciences (UBA), explained to infobae: “The inner core rotates like the surface of the Earth and at the same speed. There was a misinterpretation of the original study of nature What the Chinese experts from Peking University did.

Secondly, the expert specified: “Chinese researchers studied this recent pattern through seismic records from Alaska and the South Sandwich Islands dating back to 1964 and appear to be related to the gradual decline in internal core velocity as part of a nearly seven-decade oscillation.

This scientific study does not find a higher speed. They are studies that have stalled in research in recent years, but it is a very short time compared to terrestrial evolution. It is impossible for the Earth’s inner core to stop or rotate in the opposite direction of Earth’s rotation. It’s physically impossible,” Rappellini closed.

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