 the interplanetary medium) in a magnetic field, induces electric currents which in turn generates magnetic fields, and in this respect it behaves like a MHD dynamo.The interplanetary magnetic field at the Earth's orbit varies with waves and other disturbances in the solar wind, known as "space weather".The field is a vector, with components in the radial and azimuthal directions as well as a component perpendicular to the ecliptic.