Which layer of the Earth is primarily responsible for the generation of the Earth's magnetic field?

The outer core is primarily responsible for generating the Earth's magnetic field due to its composition and dynamic properties. This layer is composed mainly of liquid iron and nickel, and the movement of these molten metals generates electric currents. According to the dynamo theory, as the outer core flows due to convection currents, it creates magnetic fields. These magnetic fields can combine and reinforce each other, producing a large-scale magnetic field that extends beyond the planet.

The other layers, such as the crust and the mantle, do not contribute significantly to the magnetic field because they are not composed of molten metals capable of creating the electric currents necessary for magnetic field generation. The inner core, although solid and composed mainly of iron, is not involved in these dynamic movements that produce the magnetic field; instead, it is the liquid outer core that plays the crucial role.