Photo: Earthquakes Help Take Deep Earth's Temperature



A diagram shows Earth's layers: crust on top, mantle in the middle, and a molten outer core surrounding a solid inner core. Points near the geographic North Pole indicate where the magnetic pole could be found in 1900 and 1996.

Using a technique adapted from oil and gas exploration, researchers have made the best estimate to date of the temperature of the core-mantle boundary: 3,950 Kelvin, plus or minus 200. The information could help scientists better understand how heat transfer between the core and the mantle affects the planet's magnetic field.

Image courtesy NASA


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.