/data/photo/2021/06/16/60c8f171e506d.jpg?fit=%2C&ssl=1 "The Mystery of the Earth’s Leaning Core and Reduced Geothermal Underneath All of Indonesia")
KOMPAS.com- There is a strange mystery at the core Earth. Scientists discover earth’s core growing sideways causes a decrease in the heat of the planet below Indonesia.
As reported Room, Wednesday (16/6/2021), scientists can only see this phenomenon when studying seismic waves, namely underground vibrations caused by seismic waves. earthquake.
The waves pass through the planet’s dense iron core.
For some reason, these seismic waves travel through the Earth’s core significantly faster as they travel between the north and south poles, than when they travel across the equator.
Researchers have known this difference in the movement of seismic waves for decades, known as seismic anisotropy.
However, these scientists were unable to provide an explanation consistent with the available data.
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Today, using computer simulations of the growth of the Earth’s core over the past billions of years, seems to offer a solution. New study has been published in the journal Natural Geoscience last June 3rd issue.
Every year, little by little, the Earth’s core grows in an oblique pattern, with new iron crystals forming more rapidly on the east side of the core than on the west side.
“The movement of molten iron in the Earth’s outer core carries heat away from the inner core, causing it to freeze,” said study lead author Daniel Frost, a seismologist at the University of California, Berkeley, US.
“So this means the outer core has picked up more heat from the east side (under Indonesia) than the west (under Brazil),” Frost added.
This means that the Earth’s core beneath Indonesia loses heat faster than under Brazil.
Also read: Earth Layer Structure and Explanation Per Layer
earth illustration
The asymmetrical growth of the Earth’s core, the researchers say, does not mean there are defects or risks, thus making it unbalanced.
On average, the radius of the Earth’s core grows evenly about 1 millimeter every year. Gravity corrects the oblique growth in the east by pushing new crystals towards the west.
There, the crystals agglomerate into a lattice structure that runs along the north-south axis of the nucleus.
According to research modeling, this crystal structure, parallel to the poles earth, is a seismic superhighway that allows earthquake waves to travel faster in that direction.
Also read: Earth Warms, Temperature Rises 1.5 Degrees Celsius in a Year
So, what causes the Earth’s core to grow in a tilted pattern?
Frost says it’s hard to tell without looking at all the other layers of the planet.
“Every crust is controlled by what is above it, and affects what is below it, ”Frost said.
“The inner core slowly solidifies from the melted outer core, like a snowball adding more layers. Then the outer core is cooled by the Earth’s mantle above it,” Frost explained.
Also read: Finally Recognized, Earth Now Has a Fifth Ocean
Earth layer illustration-
Plate tectonics partly could be the cause of this phenomenon.
Frost explains the moment tectonic plates cold dive deep beneath the earth’s surface in subduction zone, they cool the mantle beneath.
However, Frost said, whether cooling in the Earth’s mantle could impact the inner core is still a matter of debate.
This mystery still baffles scientists. It is equally puzzling whether the tilted cooling in the Earth’s core can affect the Earth’s magnetic field or not.
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Modern magnetic fields are powered by the movement of molten iron in the Earth’s outer core. This fluid movement is powered by the heat lost from the inner core.
If the Earth’s inner core loses more heat in the east than in the west, then the outer core will also move more eastward, Frost explained.
“The question is, does this change the strength of the magnetic field?” added Frost.
This is a big question that lies beyond this new study paper.
However, Frost says he has started working on new research with a geomagnetic team to investigate some of the mysteries of the tilted growth of the Earth’s core.
Also read: NASA Finds Earth-like Planet With Strange Atmosphere
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