How was the earth magnetic field created? Why is it so important?

Because iron, nickel, and cobalt have free electrons in their outer shells that can spin and produce a magnetic field, iron is the primary material used to make most common magnets.

A magnetic field is created when the rotating iron and nickel in the earth's inner core, which is believed to be made of liquid, spins along with the earth's axis.

Because of this relationship, electronic waves are also known as electro magnetic waves. When electricity is run through wires, a magnetic field is created; when a magnet is spun around electric wires, electric current is created.

Cosmic radiation, which is harmful to living things, is a type of electro magnetic waves. The earth's magnetic field interacts with these waves to prevent most of the harmful radiation from reaching the surface.

The stunning Northern Lights are an illustration of how the earth's magnetic field interacts with itself.

The movement of molten iron and nickel in the outer core of the Earth creates the magnetic field, which is vital because it shields the planet from dangerous solar radiation and cosmic rays, facilitates navigation, and is essential to the aurora formation process. This process is known as the geodynamo.