Red ring around the Wolf Moon

This red and blue ring around the full "Wolf Moon" tonight is a corona, not a halo. "Coronae differ from haloes in that the latter are formed by refraction (rather than diffraction) from comparatively large rather than small ice crystals. Reddish colors always occupy the outer part of a corona's ring" (source).

ISO 800, 1/10 sec, 80 mm, handheld

The lunar corona is formed the same way a rainbow is formed in daylight (diffraction), but that doesn't make it a moonbow.