Looking East just after sunset
on a clear day, you can sometimes see the shadow of the Earth
as the sun passes below the horizon. It's light casts a shadow
up into the atmosphere. The subtle pink hues are sometimes called
the Belt Of Venus.
A 22 Degree halo around the
sun showing a weak parhelia (Sundog) on the left side
of the halo and a faint portion of an upper tangent arc
at the top of the halo.
Coronas can be formed around
the sun or as in this case, the Moon.