'We may know more about the surface of other distant celestial bodies than the deep interior of our planet,' says the lead author of the study published in Nature Communications.
, adventurers descend through an Icelandic volcano into a vast underground world populated by prehistoric creatures as they explore our planet’s interior. The actual center of the Earth is nothing like this fanciful depiction – and in some ways is even more dramatic.
Earthquakes unleash seismic waves that travel through the planet and can reveal the contours of its interior structure based on the changing shape of the waves. Until now, scientists were able to detect these waves bouncing up to twice, from one side of Earth to the other and then back. The new research studied waves from 200 quakes with magnitudes above 6.0 ricocheting like ping-pong balls up to five times within the planet.
“If we were somehow able to dismantle the Earth by removing its mantle and the liquid outer core, the inner core would appear shining like a star. Its temperature is estimated to be about 5,500-6,000 degrees , similar to the sun’s surface temperature,” Tkalčić said.
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