Sighting in Prévessin-Moëns, December 24, 2013

The witness reported the sighting on 8 February 2015, well after it happened. On Christmas Eve, at about 8:30 p.m., they had seen at least five orange glowing balls drift slowly and silently across the sky over a few minutes, heading southeast. The witness said they were looking due south, toward Mont Blanc.

The investigation concluded these were most likely Thai lanterns, probably released nearby for Christmas: orange balls crossing the sky within a few minutes on a festive night strongly suggest them. The wind recorded in Geneva was blowing steadily from the southwest. In mountainous terrain, low-altitude wind is very hard to model, so wind-borne objects moving southeast are not inconsistent with that reading. In addition, Mont Blanc lies to the southeast (azimuth 126°), not due south, which suggests an uncertainty of around 45° in the direction the witness gave. GEIPAN classified the case as B: probable sighting of Thai lanterns.