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New high-resolution seismic images have produced the best estimate to date of the temperature of Earth's extremely deep interior, researchers report.
Using a method initially developed for oil and gas exploration, the scientists studied the core-mantle boundary, a region that lies about 1,860 miles (3,000 kilometers) below the planet's surface.
This technique allowed the team to piece together images based on seismic waves bounced off materials around the boundary.
The resulting 3-D map of the region revealed minerals and pressure levels that indicated the surrounding temperature.
