The black ring appeared over Moscow

In Moscow, the Sputnik residential complex in Strogina, residents filmed a strange black ring of smoke that hovered over the houses, slowly dissolving into the air.

The recording of this unusual phenomenon shows how a ring of blue-black smoke slowly melts, flying over the houses.

According to eyewitnesses, shortly before the appearance of the strange ring, they heard a loud sound like a pop.

It is not known what exactly caused the abnormal phenomenon. The residents themselves explain the phenomenon by "sharply escaping smoke from the chimney."

There is no need to worry, it's just smoke that escaped from a pipe or a circular structure.

Strange black rings, similar to smoke, often appear in one or another corner of our planet (most often in Europe), causing the close attention of ufologists and other researchers.  Earlier, such a smoky ring was observed in the sky over the Chinese city of Dalian, just over the Dalianwan Bay of the Liaodong Peninsula, thereby scaring and surprising vacationers on Jinxitan Beach.