This figure illustrates that large-scale fields are able to mimic the observed Unipolar Magnetic Regions (UMRs) discussed by Bumba and Howard. We see a number of the “backwards C-shaped” field structures emanating from active regions as the Bipolar Magnetic Region’s (BMRs) fields disperse, break up, and drift to one pole or the other, driven by magnetic forces which underlie the Sun’s surface. The fields are swept backwards by differential rotation as one may observe while watching the patterns evolve in time.
