Earth's core

The Earth's core is the part of Earth in the middle of our planet. It has a solid inner core and a liquid outer core. The temperature of the outer core ranges from 4400 °C in the outer regions to 6100 °C near the inner core.

Seismic measurements prove the core has two parts, a "solid" inner core with a radius of ≈1,220 km^[1] and a liquid outer core extending beyond it to a radius of ≈3,400 km. The densities are between 9,900 and 12,200 kg/m³ in the outer core and 12,600–13,000 kg/m³ in the inner core.^[2]

1. ↑ Monnereau, Marc; Calvet, Marie; Margerin, Ludovic; Souriau, Annie (May 21, 2010). "Lopsided growth of Earth's Inner Core". Science. 328 (5981): 1014–17. Bibcode:2010Sci...328.1014M. doi:10.1126/science.1186212. PMID 20395477. S2CID 10557604.
2. ↑ Hazlett, James S.; Monroe, Reed; Wicander, Richard (2006). Physical geology : exploring the earth (6. ed.). Belmont: Thomson. p. 346. ISBN 978-0-495-01148-4.