New theory for the Earth’s core

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The Earth’s core consists of two parts: a solid inner iron core with a radius of 1,220 kilometers (slightly smaller than the Moon), and the outer core, a 2,500-kilometer-thick molten iron shell. The depth, pressure and temperatures of the core do not make it possible to access it by any technical means. That is why there are many questions both about its composition and its mechanisms.

A team of researchers led by Rhet Butler, a geophysicist at the University of Hawaii, say that the inner core of our planet is not solid. In their publication in the journal Science Direct, the researchers report that the Earth’s inner core is made up of various structures, some solid, some soft, and some liquid.

The researchers came to their conclusions by studying seismic data. They created pairs of opposite regions of the planet and proceeded to analyze seismic data of the two regions. The pairs were Tonga-Algeria, Indonesia-Brazil and three regions of Chile-China.

Simulations based on this data were performed with the Japan Earth Simulator supercomputer, the results of which indicated the existence of the three structures of the inner core of our planet. Researchers will perform new simulations with the same supercomputer to determine if the presence of the three structures in the inner core is compatible with the function of the Earth’s magnetic field produced by the operation of our planet’s core. If the results are positive this will significantly strengthen this new theory.

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