The unusual formation seen in the sky in this image is most likely a rare cloud phenomenon known as a Fallstreak hole, sometimes called a “hole-punch cloud.” It can look dramatic and even mysterious, but it has a well-understood natural explanation. This type of cloud forms when a layer of mid-level clouds—usually made of tiny supercooled water droplets—suddenly begins to freeze.

When ice crystals start forming in one spot, the surrounding droplets quickly evaporate, leaving a large circular or oval gap in the cloud layer. Sunlight passing through that opening can create the bright glowing effect that makes the scene look almost like a portal in the sky.

These formations often appear after an aircraft passes through the cloud layer. The change in pressure and temperature caused by the plane’s wings or propellers can trigger the freezing process that creates the hole. Within minutes, the opening can grow wider, forming the striking ring-shaped cloud seen from the ground.