From the archive: Scientists say they've detected a new, mysterious layer at the center of our home planet. The discovery could unearth more about Earth's history.
what lies below that an “innermost inner core" was confirmed.
Their work revealed a distinct change in the structure of iron deep within the inner core at about 3,604 miles below the Earth's surface. You may recall from earlier that the inner core consists of solid iron alloy. This is due to high pressure deep within the Earth that stops the iron alloy from melting. But distinct structural changes were detected in this iron alloy that set apart the newly discovered innermost layer from the rest of the inner core.
“The details of this big event are still a bit of a mystery, but we've added another piece of the puzzle when it comes to our knowledge of the Earths' inner core,” said the study’s lead author and researcher, Joanne Stephenson, in aSeismic monitoring allows us to gain a better understanding of Earth's interior. This is made possible by measuring sound waves that are created by earthquakes and pass through Earth's layers.
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