The Inner Core is the Earth's innermost layer, located beneath the Outer Core. It is primarily composed of solid iron and nickel and has temperatures that can reach up to 5,700 degrees Celsius (10,300 degrees Fahrenheit). The immense pressure at this depth keeps the metals in a solid state despite the high temperatures. The Inner Core has a radius of about 1,220 kilometers (760 miles) and is surrounded by the Outer Core, which is liquid. This layer plays a crucial role in generating the Earth's magnetic field through the movement of molten metals in the Outer Core.