In comparison to the Earth and Mars, the Moon has relatively small magnetic fields arising from permanently magnetized rocks and minerals within its crust. In this talk, we present some background of the origin of the crustal magnetic fields observed by Lunar Prospector (1998- 1999) and Kaguya/SELENE (2007-2009) spacecrafts. We will briefly discuss techniques of mapping and interpreting magnetic variations, or anomalies. We will also discuss a few of the results of source characteristics from some of the key features of the Moon like impact craters and lunar swirls. Lunar swirls are complex optical structures with distinct albedo signatures. They are strongly correlated with crustal magnetic anomalies, and recent research suggests that the formation of lunar swirls is due to solar wind shielding related to these magnetic anomalies. We have combined current models and methods to investigate how diffuse swirl patterns could form, exploring the effect of field superposition from several weak, permanently magnetized crustal sources. We are working toward a model of diffuse swirl formation using dipole and electric field modeling, with current emphasis on Reiner Gamma.