Australia residents were provided with a rare spectacle of nature on Monday in the Gippsland region of Victoria, a rare type of cloud shaped like a circle surrounded a very prominent rainbow in the center — prompting locals to wonder if the rapture was at hand.

Further analysis revealed that the cloud formation was in fact a “fallstreak hole.” The National Oceanic and Atmospheric Administration (NOAA) defines a fallstreak hole as a circular or elliptical gap that can appear in cirrocumulus or altocumulus clouds. Clouds towards the top of the atmosphere are composed of tiny water droplets that maintain temperatures lower than freezing, yet they do not actually freeze until they are presented with ice crystals to bond to.

When planes pass through the atmosphere, they usually leave a series of ice crystals in their wake, providing a bonding opportunity for the water droplets. As the water droplets freeze they begin to fall from that region of the cloud leaving the hole structure in the middle of the cloud. The monicker “hole punch cloud” has been applied to this abnormality because of the rounding in the clouds caused by the freezing droplets.

In the case of the fallstreak hole in southeastern Australia this week, some ice crystals in the middle of the hole reflected sunlight to cause a gorgeous rainbow pattern that not many meteorologists have seen occur in nature.