Fallstreak Hole

Is it looks amazing?  This picture shows hole punch clouds. These holes are very strange in clouds. The amazing phenomena is called fallstreak holes.

A Fallstreak Hole

Fallstreak hole are rarely occurred and it is a large circular or elliptical gap that can be found in altocumulus clouds. These kinds of holes are usually formed as the temperature of the water present in the clouds is below the freezing temperature. Even after the water is not frozen due to the low level of ice nucleation Particles . When the ice particles do form, it undergoes certain chain reaction which ultimately results in the evaporation of water droplets around the crystal due to the Bergeron process. This phenomena results in the formation of large elliptical or circular hole in the cloud called fallstreak hole.

What about the fallstreak path created by aircraft? Answer is simple.
These ice crystal can be formed by the passing of jet aircrafts which can reduce the pressure behind the wings. As a result air suddenly cools and produce ribbon of ice crystals tailings in the aircraft's path.

The amazing holes have different name such as skypunch, canal cloud, punch hole cloud, cloud hole and hole punched clouds. These kinds of holes in the clouds are rare and very unusual among clouds.