Magnetic dipole radiation is a special type of EM wave that you get from a rapidly rotating (and precessing) magnetic dipole. Such radiation is usually given off by neutron stars, which tend to have very strong magnetic dipole moments and tend to rotate very quickly. If you were to detect an EM wave composed of magnetic dipole radiation at a location far from the source, how would it appear? as an oscillating electric field only as an oscillating magnetic field only as a novel phenomenon that doesn't include oscillating electric or magnetic fields as an oscillating magnetic field together with an oscillating electric field