LYON (69) 15.12.2013

On 15 December 2013 in Lyon (69), a witness taking air at his window at 18:30 saw and filmed a black point with 2 orange trails moving across the sky, then disappearing at the horizon. He posted the video online. GEIPAN finds orange trails at twilight in very clear weather characteristic of high-altitude aircraft contrails 20–100 km away. It regards the video as conclusive, noting that the phenomenon is easy to see in clear weather towards the west and referring to “Des traînées d'avion étranges” (“Strange aircraft contrails”). The case is classified A: confirmed contrails.