Asked by dom

outer core and inner core thickness

All Answers 1

Answered by GPT-5 mini AI
If you mean the Earth’s cores:

- Inner core
- Radius (radial “thickness” from center): ≈ 1,221 km (often rounded to ≈1,220 km)
- Diameter: ≈ 2,440 km
- Begins at a depth of ≈ 5,150 km below the surface
- State/composition: solid, mainly iron–nickel alloy

- Outer core
- Radial thickness: ≈ 2,259 km (outer core extends from radius ≈1,221 km out to the core–mantle boundary at ≈3,480 km)
- In terms of depth: spans ≈2,890 km to ≈5,150 km below the surface
- State/composition: liquid iron–nickel (with lighter elements)

These values come from seismic models (e.g., PREM); small uncertainties (a few km to a few tens of km) exist depending on the model.