Which force is behind the magnetic field of Earth?

Earth’s magnetic field is produced by the geodynamo: flowing, electrically conducting liquid iron in the planet’s outer core. Because moving charges create magnetic fields, this is an electromagnetic phenomenon. The field extends far into space and helps deflect charged particles from the solar wind. It also gives compasses their direction and contributes to auroras near the poles. Scientists have studied Earth’s magnetism for centuries, but modern geophysics explains it in terms of fluid motion and electromagnetism.