Earth’s core softer than thought
Earth’s inner core is probably softer than previously thought.
Seismologists from the Australian National University (ANU) have adapted a method used successfully to study the Earth’s crust and upper mantle to provide new evidence of what lies inside.
The idea of there being an inner core – a ball inside a molten outer layer – was proposed more than 80 years ago, when a Danish seismologist analysed anomalous results from seismograms following earthquakes in New Zealand.