The The inner core of the earth In a process that began the cooling of liquid iron, it was growing on one side 500 million years ago. The cause of this uneven growth is unknown, according to a study by seismologists University of California It was published Nature Geoscience.
However, uneven growth does not deform the core of our solid iron Gravity As the molten iron in the outer core crystallizes, it is responsible for maintaining the spherical shape of this structure, which grows at a rate of one millimeter per year.
The strange event is recorded below Banda Sea in Indonesia. According to research, it is believed that there is something that removes heat from the outer core or the earth’s crust below the indicated area. With further cooling, the crystallization of the iron occurs faster and, as a result, the inner core grows faster.
Temperature variation The Earth’s magnetic field is directly involved in the unequal expansion of the nucleus. It acts as a protective layer against the radiation emitted by the sun, and thanks to the heat dissipation from the inner core, it causes the convection process in the outer core of the liquid.
Uneven growth of inner core
The first signs of this defect were found in seismic waves. They pass through the inner core at a higher velocity on the axis of rotation (north-south) than the equator. The researchers attributed the slow movement of the waves Crystallized iron.
Using a computer model, seismologists at the University of California concluded that the Earth’s inner core is growing rapidly at its equator. In addition, the growth rate is 60% higher in the East than in the West.