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Structural Changes in Earth’s Inner Core

Kumari Sonali

Structural Changes in Earth’s Inner Core:

A study published in Nature Geoscience reveals that Earth’s inner core is undergoing structural changes.

  • Researchers analyzed seismic waves near Antarctica’s South Sandwich Islands from 1991 to 2024. Repeating earthquakes revealed subtle changes in seismic waves, offering insights into Earth’s inner structures.
  • The near surface of Earth’s inner core is undergoing structural changes, challenging the earlier belief that it is rigid and stable.
  • The inner core’s rotation appears to be slowing down, which could subtly alter the length of a day on Earth.
  • Researchers suggest viscous deformation in the inner core is caused by dynamic interactions between the turbulent, molten outer core and the solid inner core, similar to how magma flows under stress.

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