Earth's outer core
Earth's outer core
Fluid layer between Earth's solid inner core and its mantle.
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Readers' pathsAug 2026 – Oct 2026
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Earth's inner core
Innermost part of Earth, a solid ball of iron-nickel alloy.
54%
Earth's mantle
Layer of silicate rock.
11%
Hollow Earth
Disproven hypothesis.
4.7%
Core–mantle boundary
Discontinuity where the bottom of the planet's mantle meets the outer layer of the core.
4.5%
Internal structure of Earth
4.4%
Travel to the Earth's center
Popular theme in science fiction.
3.3%
Iron
Chemical element with atomic number 26 (Fe).
1.8%
Dynamo theory
Mechanism by which a celestial body generates a magnetic field.
1.6%
Nickel
Chemical element with atomic number 28 (Ni).
1.5%
Earth's magnetic field
1.5%
Readers come from
Share of the 7,276 readers arriving from another article
Earth's inner core
Innermost part of Earth, a solid ball of iron-nickel alloy.
18%
Internal structure of Earth
17%
Earth
Third planet from the Sun.
15%
Earth's mantle
Layer of silicate rock.
14%
Geophysics
Physics of the Earth and its vicinity.
6.1%
Large low-shear-velocity provinces
Structures of the Earth's mantle.
4.6%
Lower mantle
Region from 660 to 2900 km below Earth's surface.
4.4%
Core–mantle boundary
Discontinuity where the bottom of the planet's mantle meets the outer layer of the core.
3.7%
Earth's magnetic field
3.5%
Rock (geology)
Naturally occurring mineral aggregate.
2.4%