What is a magnetic field?

Magnetic fields exist all around us. Their strength depends on our specific environment. If strong enough, they may disturb the functioning of one’s watch. Quartz watches will be affected for the duration of the time spent in the magnetic field, and then go back to normal. Magnetism may disturb mechanical watches and interfere with their functioning by making the hair spring inside the movement stick. Avoiding areas with strong magnetic fields is recommended, especially for those wearing watches containing mechanical movements.