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The near surface of the inner core may be changing. (USC Graphic/Edward Sotelo)

Earth’s inner core is undergoing a transformation

February 14, 2025

$A new study of Earth's inner core used seismic data from repeating earthquakes, called doublets, to find that refracted waves, blue, rather than reflected waves, purple, change over time -- providing the best evidence yet that Earth's inner core is rotating. Credit: Michael Vincent$

Growing mountains or shifting ground: What is going on in Earth’s inner core?

Structure layers of the earth.

Scientists Find Iron ‘Snow’ in Earth’s Core

Earth

Laser experiments lend insight into metal core at heart of Earth

Jessica Irving sits with two meteorites Princeton seismologist Jessica Irving

Seismologists use massive earthquakes to unlock secrets of the outer core

First measurement of magnetic field in Earth’s core

September 15, 2011

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