The centre of the Earth is its core, located approximately 2,890 km beneath the planet's surface.
Understanding Earth's Core
The Earth's core isn't a single, solid entity; it is comprised of two main parts: the molten outer core and the solid inner core. Together, they form a sphere with a diameter of about 6,800 km. This core constitutes the very centre of our planet, influencing everything from its magnetic field to its internal heat.
Breakdown of the Earth's Core
| Component | State | Approximate Depth (km) | Diameter (km) |
|---|---|---|---|
| Outer Core | Molten | 2,890 - 5,150 | ~4,500 |
| Inner Core | Solid | 5,150 - ~6,370 | ~2,400 |
Key Characteristics:
- Depth: The core starts at a significant depth, far beneath the Earth's crust and mantle. As the reference states, it is 2890 km down from the upper level of the planet.
- Composition: Primarily composed of iron and nickel, with the inner core existing as a solid mass due to immense pressure.
- Diameter: The entire core, including both the outer and inner parts, spans a diameter of roughly 6,800 km.
- Significance: This is the centre point of the Earth, having significant implications for geological and geophysical processes.
Visualizing the Core
Imagine peeling an orange. The Earth's crust is like the thin outer layer, the mantle is like the meaty part, and the core is at the very centre. The core is not easily accessible, and its properties are studied using seismic waves.
