Luminous rectangle in a forest near Bourgoin-Jallieu in 1981

Summary

On November 21, 1981, around 8:00 p.m., two people observed an unusual luminous phenomenon in a forest near their home in Bourgoin-Jallieu. The object was rectangular, emitted a red-orange glow, and remained stationary. Over nearly an hour, a green halo formed around it, followed by two powerful beams projecting yellow light. The object then slowly ascended at roughly 45 degrees before vanishing without a sound. One witness returned the next day and found no traces. Gendarmes were notified 25 days later but found no physical evidence or additional witnesses. GEIPAN classified the case as C.