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Earth's Inner Core Is Solid, But Squishier Than Previously Thought (abc.net.au)

brindafella writes: Earthquakes are telling scientists more about the core of the Earth, specifically that it is squishier than previously thought (by about 2.5%.) Associate Professor Hrvoje Tkali & Thanh-Son Pham of the Australian National University have made sense of data collected by seismographs around the world to put new numbers on the density and pressure of the core. In Science magazine, they show that the pressure is 167.4 +/- 1.6 gigapascals (GPa) in Earth's center. For reference, standard atmospheric pressure is 101,325 pascals (Pa), so the center of the Earth is around 61 million times this pressure, but still 2.5% lower than expected.

6 of 66 comments (clear)

  1. Re:Summary says "101,325 pascals (Pa)" by rrohbeck · · Score: 2

    How much is that in football fields? Or, since we're talking pressure, olympic swimming pools per football field?

  2. Predicted over 50 years ago... by unitron · · Score: 4, Interesting

    ...by Laura Petrie on "The Dick Van Dyke Show".

    https://www.youtube.com/watch?...

    15:50

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  3. Re:Summary says "101,325 pascals (Pa)" by ShanghaiBill · · Score: 2

    the the Americans would write that as given in the summary, 101,325

    Not just Americans, but also most of Asia, except for Indonesia. Even in Europe, the UK and some parts of Switzerland use a decimal point, although the Swiss use an apostrophe as a thousands separator.

    Here is a map. Although it looks close to a tie, it really isn't because the areas using an American style decimal point include densely populated countries such as China, India, Nigeria, and Pakistan, while the decimal-comma areas include lots of deserts, tundra, and rainforest.

    The dot wins.

  4. Re:Summary says "101,325 pascals (Pa)" by ShanghaiBill · · Score: 4, Funny

    No shanghai bitch, it's not a popularity contest.

    Ok, lets go by nukes instead. Of the 9 countries known to possess nuclear weapons, 7 use the decimal point.

    The dot wins again.

  5. Re:61 million times? by hcs_$reboot · · Score: 2

    Reverse 1 and 6 and divide by 10. Decadyslexia disease affects primarily tired editors.

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  6. Re:Units by jd · · Score: 4, Funny

    Figs. One metre of lateral motion when crushed by one Pascal of pressure is one fig. The energy so created is thus measured in fig newtons.

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