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For a long time, scientists believed that the essence of the inner earth was A solid ball of metalIt is somewhat similar to a planet on a planet sitting about 3000 miles (4828 km) below the surface.
However, researchers from the University of South Carolina (USC) says they discovered almost by chance – that the inner essence of the earth may be more flexible.
John Vidal, a professor of Earth Sciences at the Faculty of Letters, Arts and Sciences, who was the main researcher in the new study, said the lead researcher in the new study, In a statement The researchers “did not begin determining the material nature of the inner nucleus.”
Originally, USC scientists were following how our planet’s internal rotation speed decreased, because previous research found that basic Slow. The method of drawing this includes studying seismic wave data from earthquakes.
The team used data from 121 repetitions Earthquakes Between 1991 and 2024; The chosen events occurred across 42 different locations near the inhabited southern Sandwich Islands, which are located north of Antarctica.
Credit: USC/Edward Sotelo
Usc scientists were studying wave forms when they reached some sudden data that contradict our previous understanding of the internal nucleus of the Earth. A set of data of wave forms held some unusual characteristics that the team was not expected to see.
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“While I was analyzing its multiple value of earthquakes, one group of data from seismic waves stood with the rest of the rest,” Vidal said. “Later, I realized that I was staring at the evidence that the inner core is not solid.”
Once the Vidale team improved decision technology, they found that seismic waves “are an additional physical activity for the internal nucleus.” Therefore, the data led them to believe that the internal nucleus may move a little, instead of staying completely solid.
“What we ended up with its discovery is evidence that the near surface of landVidal said the inner core is subject to structural change. “
According to researchers, structural change may be associated with slowing the inner nucleus and may lead to a better understanding of the thermal and magnetic fields of the Earth. What’s more, the change may be “precisely all day long”.
Research It was published on February 10 in Nature Geoscience.
