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  2. Earth's outer core - Wikipedia

    en.wikipedia.org/wiki/Earth's_outer_core

    Earth's outer core is a fluid layer about 2,260 km (1,400 mi) thick, composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. [ 1 ] [ 2 ] [ 3 ] The outer core begins approximately 2,889 km (1,795 mi) beneath Earth's surface is at the core-mantle boundary and ends 5,150 km (3,200 mi) beneath Earth's ...

  3. Internal structure of Earth - Wikipedia

    en.wikipedia.org/wiki/Internal_structure_of_Earth

    The transition between the inner core and outer core is located approximately 5,150 km (3,200 mi) beneath Earth's surface. Earth's inner core is the innermost geologic layer of the planet Earth . It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is about 19% of Earth's radius [0.7% of volume] or 70% of the Moon 's radius.

  4. Earth - Wikipedia

    en.wikipedia.org/wiki/Earth

    Beneath the mantle, an extremely low viscosity liquid outer core lies above a solid inner core. [132] Earth's inner core may be rotating at a slightly higher angular velocity than the remainder of the planet, advancing by 0.1–0.5° per year, although both somewhat higher and much lower rates have also been proposed. [133] The radius of the ...

  5. Earth’s core has slowed so much it’s moving backward ...

    www.aol.com/news/scientists-ve-confirmed...

    Lehmann was the first to suggest that wayward P waves might be interacting with a solid inner core within the liquid outer core, based on data from a massive earthquake in New Zealand in 1929.

  6. Planetary core - Wikipedia

    en.wikipedia.org/wiki/Planetary_core

    The first detection of Earth's core occurred in 1906 by Richard Dixon Oldham upon discovery of the P-wave shadow zone; the liquid outer core. [9] By 1936 seismologists had determined the size of the overall core as well as the boundary between the fluid outer core and the solid inner core. [10]

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  8. Magma ocean - Wikipedia

    en.wikipedia.org/wiki/Magma_ocean

    Today Earth's outer core is a liquid layer about 2,260 km (1,400 mi) thick, composed mostly of molten iron and molten nickel that lies above Earth's solid inner core and below its mantle. [9] [10] [11] This layer may be considered as an ocean of molten iron and nickel inside Earth.

  9. Every 8.5 Years, Earth's Core Mysteriously Wobbles ... - AOL

    www.aol.com/lifestyle/every-8-5-years-earths...

    Every 8.5 years the Earth's core wobbles, resulting in a mysterious ‘signal.’ A new study attempts to explain this geophysical mystery.

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