Hastings anthelic arc closely resembles the appearance of
Wegener's anthelic arc. While the apex of Wegener's anthelic arc is on the
upper tangent arc, the apex of Hastings' anthelic arc is on the
upper concave Parry arc.
This halo type has always been observed together with Wegener's anthelic arc. Only the separation of the two arcs in the solar area allows a clear identification of the halo type.
Due to the rarity of the phenomenon, there are hardly any documented records of this halo type in Europe. Hastings' anthelic arc was able to be documented during the
halo phenomenon of Neklid.
