Not so long ago, Earth’s interior was thought to be made up of four layers: the crust, mantle, (liquid) outer core, and (solid) inner core. In a new study published in Nature Communications, we provide further evidence for the existence of an “innermost inner core” — a distinct internal metallic ball embedded in the inner ...
Let’s take a journey into the depths of the Earth, down through the crust and mantle nearly to the core. We’ll use seismic waves to show the way, since they echo through the planet following an earthquake and reveal its internal structure like radar waves. Down near the core, there are zones where seismic waves ...
A new study by researchers at The Australian National University (ANU) could help us understand how our planet was formed. Associate Professor Hrvoje Tkalčić and Ph.D. Scholar Thanh-Son Phạm are confident they now have direct proof the Earth’s inner core is solid. They came up with a way to detect shear waves, or “J waves,” ...
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