What’s taking place to this cloud? Ice crystals in a miles away cirrus cloud are acting love runt floating prisms. Known informally as a fireplace rainbow for its flame-love appearance, a circumhorizon arc appears to be parallel to the horizon. For a circumhorizontal arc to be visible, the Sun must be no longer less than 58 levels high in a sky where cirrus clouds stamp beneath — in this case cirrus fibrates. The a spread of, flat, hexagonal ice-crystals that make the cirrus cloud must be aligned horizontally to smartly refract daylight hours in a collectively same manner. Therefore, circumhorizontal arcs are severely weird and wonderful to peep. The featured fire rainbow changed into as soon as photographed earlier this month come North Fork Mountain in West Virginia, USA.
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