For decades, geophysicists have known that something unusual happens nearly 2,900 kilometres beneath our feet. Seismic waves from earthquakes suddenly speed up in a thin zone just above Earth’s core.

Seismic waves traveling through Earth's interior often propagate at different speeds depending on their direction, a ...

Scientists have mapped how Earth’s deepest mantle is being deformed—and the results point to long-lost tectonic plates buried thousands of kilometers underground. Using a massive global dataset of ...

BUTTE, Mont. — Envision this scenario: You are going about your day. All is calm and quiet until suddenly, the ground beneath your feet begins to shake, and items within your home or workspace begin ...

Over a thousand miles from the surface, in Earth’s D” layer—right on the edge of the liquid metal outer core—there is a weird acceleration of seismic waves. Experiments recreating the phenomenon in a ...

As seismic waves travel through Earth, they gradually lose energy, a process called attenuation. That energy loss doesn't happen uniformly—some features in the crust sap far more energy from seismic ...

Over 25 million cubic yards of rock and ice broke loose and plunged into Greenland's Dickson Fjord, creating a 650-foot-high ...