It looked still to you before because you were moving with it. We have this same problem with electric and magnetic fields. Depending on your reference frame, what appears to be a magnetic force ...

This paper presents a method of compensation the environment magnetic field dynamically for array OPMs based on real-time signal separation. The OPMs serves as the signal measurement sensors, as well ...

If you need help visualizing magnetic fields, these slow-motion video captures should educate or captivate you. Flux lines are difficult to describe in words, because magnet shape and strength ...