We show evidence to suggest that some auroral forms may be related to the field-aligned current structure associated with magnetohydrodynamic wave activity, specifically field line resonances. These auroras appear as a series of azimuthally spaced east-west elongated arcs, inclined slightly from north to south. Modeling shows that this braided appearance reflects the locations of upward field-aligned current driven by the wave. Moreover, more complicated auroral structures can be produced if several harmonically related waves occur together. We model a situation in which two harmonic components are present at the latitude of resonance and demonstrate the striking similarity between the resulting field-aligned current structures and actual auroral observations. ¿ 2001 American Geophysical Union