Earth’s core is much hotter than thought


European scientists said Thursday that a new laboratory experiment shows the Earth’s core is likely much hotter than last reported 20 years ago. PHOTO FROM NASA.GOV

WASHINGTON—European scientists said Thursday that a new laboratory experiment shows the Earth’s core is likely much hotter than last reported 20 years ago.

It’s not that the iron core of our planet has warmed, but rather that the technique used to estimate its heat previously was flawed, researchers said in the journal Science.

Newer techniques have allowed experts at the European Synchrotron Radiation Facility to determine the temperature near Earth’s center to be 6,000 degrees Celsius (10,832 degrees Fahrenheit).

That is about 1,000 degrees C hotter than an experiment conducted by German researchers in 1993.

Researchers are analyzing the solid iron core of the Earth, where extreme temperatures and pressure result in a hard center, while the surrounding iron at lower temperatures of about 4,000 degrees Celsius remains liquid.

“We have developed a new technique where an intense beam of X-rays from the synchrotron can probe a sample and deduce whether it is solid, liquid or partially molten within as little as a second, using a process known diffraction,” said Mohamed Mezouar from the ESRF.

“And this is short enough to keep temperature and pressure constant, and at the same time avoid any chemical reactions.”

The X-ray technique is believed to be superior to the optical technique used by Germany’s Reinhard Boehler, who reported a result about 1,000 degrees cooler based on the observation of recrystallization which was interpreted as melting.

“These measurements confirm geophysical models that the temperature difference between the solid core and the mantle above, must be at least 1,500 degrees to explain why the Earth has a magnetic field,” the French team said of its findings.

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  • whoknowzz

    why is this in business section? WTF!

  • WeAry_Bat

    Just a note, this was a difficult laboratory experiment which they used to assume what it would be at the Earth’s core. There is still no direct evidence of what is the temperature at the core.

    • popeyee

      wala ring direct evidence kung gaano kainit ang araw, pero naniniwala tayo sa kung anong figure meron ang mga scientists…siguro di ka rin naniniwalang may utak ka dahil wala kang ebidensya na merong nga..

  • nes911

    Kaya pala sabi nila ang impiyerno ay nasa lupa.

    • marionics

      nasa ilalim ng lupa actually he he

      • popeyee

        sana nga nasa sa lupa, para mabilis ang pagbiyahe ng mga corrupt na politikong nagpaparirap sa atin..

  • QritiQ

    It’s alarming to note that no interest is generated when an article is about the earth and nature but if it’s politics, comments, specially from haters, swarm in. Makes us realize that earth and nature is not the problem. It’s the bacteria-like, uncaring, selfish, humans who idolize self-righteous politicians and yes, themselves.

    • marionics

      ikaw naman. di naman lahat kayang sakyan yang ganyang science e

      • WeAry_Bat

        deep science, literally.

      • marionics

        real deep

      • Meow Ming

        deep throat ^-^

      • ARIKUTIK

        And you believe in magic numbers. How can you figure out if it is true or not. The measurers themselves can hardly agree with each other.

        This is the truth, a baby door in between woman’s tight is hottest of all.

      • marionics

        i agree and that is based on “hard” science…get it? he he

    • Karlo Cases Arellano

      QFT… I guess many find this “irrelevant” compared to showbiz and politics

    • patriotic_act

      because they wont appear “intelligent” here than those political articles they comment on.


      Who will be interested of lies. Today it’s 1,000 long, the next day another will say, “Mine is better it’s 2,000 long”. What is that some monkey who had seen a sexy lady that a front tail becomes longer? Politicians are more credible, Whei !

  • marionics

    no commentors huh? wala bang nakapanuod ng “the core”?

    • spitfire

      siguro nagsawa na ang mga pinoy sa “the cory.”

      • marionics

        ok lang yun basta di sila magpunta sa “the jackie” he he

      • popeyee

        at sa ” the Naybi”….

      • ARIKUTIK

        Nagbasa nga ng Science na may Sense, ipinasok mo naman ang walang sin na Corykung……. Baliw talaga !

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