Filmed in Bogor, the scene surprised internet users, but it can be explained by a known atmospheric phenomenon.

A video filmed in Bogor, Indonesia, has intrigued internet users for the past few days. It shows a brightly colored, almost unreal cloud that seems to shine in the sky like a rainbow.

The images quickly circulated on social media. Many users believed it to be a montage or an AI-generated image, so spectacular did the phenomenon appear. However, it is a real atmospheric effect, albeit a rare one.

An iridescent cloud, not just a simple rainbow

This type of phenomenon is known as cloud iridescence. It occurs when sunlight passes through very small water droplets or ice crystals of fairly uniform size.

The light then disperses into several colors, a bit like in a soap bubble. Unlike a classic rainbow, which often forms a clearly visible arc, iridescence appears more as colored patches on a part of the cloud.

It is this mixture of pink, green, purple and blue that gives the cloud its almost supernatural appearance.

Why was the phenomenon observed in Indonesia?

The phenomenon observed in Bogor is thought to be linked to a cloud called a pileus. This type of cloud can form above a cumulonimbus cloud when air is rapidly forced upwards and cools.

Under certain conditions, the thin layer of cloud that forms at the top becomes ideal for creating highly visible colors. However, the sun must be positioned at the right angle and the particles within the cloud must be sufficiently uniform.

It is this precise combination that makes the image rare and impressive.

A beautiful phenomenon, but one to be observed with caution.

Iridescent clouds often appear near the sun. Therefore, observing them directly can be dangerous for the eyes if you stare at the sunlight.

The best way to view them is to have a tree, building, or cloud block the direct sunlight. The colors then become more visible, without taking any unnecessary risks.

The video from Indonesia serves as a reminder that some natural phenomena can still surprise internet users, even in an era where many immediately suspect AI or special effects.