Earthquake vibrations suggest Earth's inner core is solid but squishy

With more than 5,000 km (3,000 mi) of rock between us and the Earth's core, it's hard to get a clear look at what's going on down there. It's long been thought that the inner core is a solid ball of iron, but direct evidence is hard to come by. Now, researchers from the Australian National University (ANU) have detected a type of seismic wave passing through the core that only propagates through solid objects.

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Category: Science

Tags:

• Australian National University
• Earth
• Earth core
• Earthquake
• Planet
• Seismic

from New Atlas (Gizmag) https://ift.tt/2PcpwE0