A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

What is the depth of Earth's inner core?

Best Answers

Inner core - Wikipedia notes a radius of 1220 km or 760 mi. That's about 5150 km or 3200 mi beneath the surface. read more

Seismic measurements show that the core is divided into two parts, a"solid" inner core with a radius of ~1,220 km 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. read more

The Earth's inner core is thought to be slowly growing as the liquid outer core at the boundary with the inner core cools and solidifies due to the gradual cooling of the Earth's interior (about 100 degrees Celsius per billion years). read more

The crust of the earth, which surrounds the mantle, ranges from only 4 to 45 miles thick. So, from the surface of the earth to its outer core the distance is roughly 1,825 miles; from the surface to the inner core, it’s 3,025 miles; and from the surface to the very center, about 3,900 miles. read more

Image Answers

Further Research