EARTH
Earth's Magnetic Field A powerful magnetic field surrounds the earth, as if the planet has an enormous bar magnet embedded within its interior. The S and N on the magnet indicate the orientation of earth's magnetic field. Because the opposite ends of magnets attract, the northern end of magnets on the earth are attracted to the southern end of the earth's magnetic field, located at the magnetic north. Scientists believe convection currents of charged, molten metal circulating in the earth's core are the source of earth's magnetic field.