In a groundbreaking discovery, scientists have detected signs of a hidden structure in the core of the Earth that has the potential to change the long-term narrative of what is at the center of the planet. Calling it the “fifth layer,” in addition to the four previously known layers — the bark, the mantle, the outer core, and the inner core, scientists would have noticed that they changed in the structure of the iron in the inner core that suggested a new “Border line”. stretching about 650 kilometers from the center of the Earth.
According to the Daily Mail report, the fifth layer has been suspected by researchers for more than a decade, but has proved almost impossible to detect. The study’s lead author and Australian National University geophysicist Joanne Stephenson is quoted by the press as saying “it’s very interesting” and said the textbooks should be rewritten now after another layer is discovered.
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How did the researchers detect it?
The researchers used travel time data for seismic waves traveling inside the Earth and were captured by the International Seismological Center. Subsequently, they used their new algorithm to search through data to find evidence of changes in the structure of the Earth’s inner core. Despite the fact that it is “particularly difficult” to detect tiny changes, researchers have been able to show that two separate cooling events in the history of the planet.
It also implies that in the first years of Earth’s evolution, at least 4.56 billion years ago, the planet went through a dramatic and previously unknown event at some point. Stephenson explained that the details of this “great special event are still a bit of a mystery,” but the researchers were able to add another “puzzle piece” when it comes to knowledge about the Earth’s core. Even if the observations were indirect, geologists have managed to determine that the Earth’s inner core reaches temperatures above 5,000 degrees Celsius and has a relatively smaller surface, ie only 1% of the total volume of the Earth.
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