  Magneto-convection can produce an active region without an initial coherent
flux tube. A simulation was performed where uniform, untwisted, horizontal
magnetic field of 1 kG strenght was advected into the bottom of a computational
domain 48 Mm wide by 20 Mm deep. The up and down convective motions produce a
hierarchy of magnetic loops with a wide range of scales, with smaller loops
riding "piggy back" in a serpentine fashion on larger loops. When a large loop
approaches the surface it produces an small active region with a compact
leading spot and more diffuse following spots.
