Image: H. Raab, Vesta
At first glance the image above might look like a UFO or even some portent of the apocalypse – but IT is actually nothing more than a cloud – a ‘hole punch cloud’, or a fallstreak cloud. Read on to find out more about this spectacular phenomenon.
10. Alabama, US
The foundation of a hole punch cloud is traditionally a mid-or high-altitude cloud type such as cirrus or cirro-stratus. Such clouds generally form above 20,000 feet in the atmosphere.
9. Unknown location
Hole punch clouds are frequently composed of both ice crystals and super-cooled water droplets (water that is below the freezing temperature but still exists in liquid form).