Instead, we study the way earthquakes shake, and based on that, we conduct research in a way that allows us to predict the inside of the earth.
This research has revealed that the Earth's interior is divided into three parts: the crust, mantle, and core.
The crust is the skin-like layer that surrounds the Earth. It is approximately 30 to 40 km thick and surrounds the Earth.
The mantle extends from beneath the crust to a depth of about 2,900 km.
Underneath the mantle is the core. This is what lies in the middle of the earth. The nucleus is divided into two parts: the inner core (inner core) and the outer core (outer core).
The inner core is a solid mass with a radius of about 1,400 km, which is surrounded by a thick, muddy lava-like mass with a thickness of about 2,100 km. This is the outer core. Both the outer and inner nuclei are thought to be made of iron and nickel.