Earth's core temperature is unexpectedly high

The temperature in the earth's core is at least 1,000 degrees Celsius higher than all previous scientific calculations, up to 6,000 degrees Celsius.

Scientists from the French National Institute of Technology Research (CEA), France's National Center for Scientific Research (CNRS) and European Synchrotron Radiation Application Agency (ESRF) have conducted an experiment to Temperature measurement in the earth core, Science magazine reported.

The inner core of the earth is a solid sphere of up to 6,000 degrees Celsius,
equivalent to the surface temperature of the sun. (Photo: National Geographic)

They measured the melting temperature of iron with very high precision in a laboratory, then used the results to calculate the temperature at the boundary between the outer core and the inner core of the earth. According to their data, the temperature in the boundary is up to 6,000 degrees Celsius - equivalent to the surface temperature of the sun and at least 1,000 degrees Celsius higher than previous calculations.

A new X-ray technique helps the team measure the metal's melting temperature faster than any past test. In the past, high-pressure compressed iron samples in the laboratory often existed for only a few seconds, making it impossible for scientists to determine when they began to melt (moving from solid state to liquid state). ).

The inner core, or the inner core, is the hardest part of the earth. It is a solid sphere with a radius of about 1,220km. The scientific community identified it as made up of a mixture of iron and nickel. The outer core is a layer of liquid material, including iron, nickel and a small amount of sulfur, oxygen. It is located at a depth of about 2,890km and has a thickness of about 2,260km.

The temperature of the inner core of the earth is an important indicator, because it helps the scientific community explain the mechanism by which the Earth makes its electromagnetic field. The temperature difference between the two cores must be at least 1,500 degrees Celsius, so that the rotation of the earth creates a magnetic field.