Bouncing seismic waves reveal distinct layer in Earth's inner core

Data captured from seismic waves caused by earthquakes has shed new light on the deepest parts of Earth
Data captured from seismic waves caused by earthquakes has shed new light on the deepest parts of Earth's inner core, according to seismologists from The Australian National University (ANU).

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Discovery reveals hard metallic truth at Earth's centre, St George & Sutherland Shire Leader

Bouncing seismic waves reveal distinct layer in Earth's inner core

Scientists unlock secrets of Earth's wickedly hot innermost realm - The Hindu

Earthquake Archives

Geophysics – sciencesprings

450-mile-wide solid metal ball forms Earth's innermost core, earthquake waves reveal

How do scientists study the Earth's core, and what kind of tools and techniques do they use? - Quora