By analyzing decades of seismic data, researchers from the University of Southern California have discovered that the surface of the inner core appears to deform under the influence of the outer core.

Located 3,000 miles below the Earth’s surface, the inner core is anchored by gravity within the molten liquid outer core. Until now the inner core was widely thought of as a solid sphere.

The inner core expands by about one millimeter annually as the outer core crystallizes. But is this growth uniform, or does it cause deeper disturbances? Studies are ongoing. Molten iron in the ...

The inner core spins independently from the liquid outer core and the rest of the planet. Without this motion, Earth would die and become more like barren Mars, which lost its magnetic field ...

The Earth's internal layers including the mantle, outer core and inner core. New research shows the inner core undergoes structural transformation likely caused by outer core disturbance.