 The magnetic field of a star is generated within regions of the interior where convective circulation occurs . This movement of <unk> plasma functions like a <unk> , wherein the movement of <unk> charges induce magnetic fields , as does a mechanical <unk> . Those magnetic fields have a great range that extend throughout and beyond the star . The strength of the magnetic field varies with the mass and composition of the star , and the amount of magnetic surface activity depends upon the star 's rate of rotation . This surface activity produces starspots , which are regions of strong magnetic fields and lower than normal surface temperatures . <unk> loops are <unk> magnetic field flux lines that rise from a star 's surface into the star 's outer atmosphere , its corona . The <unk> loops can be seen due to the plasma they conduct along their length . <unk> flares are bursts of high @-@ energy particles that are emitted due to the same magnetic activity . 
