Infralateralbogen (EE22)

The infralateral arcs are also referred to as the lower lateral contact arcs on the large ring. Their shape depends on the solar height. As the sun's height increases, the contact points move downward along the ring to the 46° ring . Consequently, the infralateral arcs form a common arc. At a solar height of 68°, the arc touches the 46° ring directly below the sun. When the sun rises even higher, the vertex of the arc is a few degrees below the 46° ring. The infralateral arc can match the circumzenithal arc in brightness and colorfulness.

The infrastructure arch is formed in hovering pillar crystals, with light entering at a vertical base surface and exiting at a prism surface.