In October 1983, Perm geologist Emil Bachurin found a 62-meter circular impression in a plowed field near Molyobka village in the Ural foothills, now called the M-Triangle, and documented persistent luminous objects, equipment malfunctions, and psychological disorientation among dozens of subsequent visitors including scientific expedition members.

The zone, spanning roughly 70 square kilometers on the Perm Krai–Sverdlovsk Oblast border, attracted organized expeditions from the late 1980s led by Eduard Ermilov of the Gorky Section on Anomalous Phenomena. Scientists recorded biolocation anomalies, multicolored flashes, and reports of temporal distortion. Historical records suggest peasants described 'flying machines' in this corridor as early as the 1830s. The site's high magnetic anomaly readings, attributed to tectonic fault interactions in some assessments, do not fully account for the optical phenomena documented on film.