Scientists have found that there is an extra innermost core at the center of the Earth made entirely of iron, measuring 400 miles in diameter.
have just got a bit more complicated, with scientists discovering a whole new inner core within the center of the planet.shows that what was assumed to be the Earth's innermost layer actually has another inner core within, made of iron and measuring around 400 miles across.
that generate electrical currents and therefore sustains the Earth's magnetic field. The mantle is made of mostly iron, magnesium and silicon, and is around 1,865 miles thick, while the crust is a mere 3.1 miles to 43.5 miles thick, depending on location.The authors made the discovery of the extra innermost core using records of"We analyzed digital records of ground motion, known as seismograms, from hundreds of large earthquakes in the last decade," Pham said.
"This new study differs from previous studies because it uses seismic waves that bounce multiple times within the Earth, along its diameter and through its center. That way, we obtain a sampling of the inner core in some directions that were unavailable with the existing methods. The more angles we can sample the inner core, the better we can tell about the distinction of anisotropic properties at two regions in the Earth's inner core.
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