What happened
Late on the afternoon of 8 January 1981, Renato Nicolaï was building a small concrete shelter for a water pump behind his house outside Trans-en-Provence when a faint whistling made him turn round. A lead-grey craft shaped like two saucers rim to rim, perhaps 2.5 metres across and 1.5 metres high, was dropping out of the sky past a tall pine. It touched down on a terrace below him with a thud like a falling stone, sat for a few seconds, then rose, tilted and shot away north-east over the trees. Where it had rested he found a ring roughly two metres across, with blackened, abraded patches. Gendarmes photographed the site and took soil and plant samples the next day under a protocol set by GEPAN, the UFO study group of the French space agency CNES. GEPAN's laboratory work, published in 1983 as Technical Note 16, reported evidence of mechanical pressure and heating of the soil and unusual changes in the wild alfalfa near the trace, and the case became France's most famous physical-evidence file.
The official explanation
French skeptics, notably Éric Maillot, argue the trace was not a circle but two overlapping arcs on a track used by vehicles, consistent with a car or truck skidding or turning; the gendarmes' first report described two concentric circles with dark striations, and Nicolaï had been doing building work that involved vehicles. Belgian skeptic Jean-Michel Abrassart notes that GEPAN investigators reached the site only about 40 days later, that neighbours rather than the witness alerted the gendarmes, and that the biochemical analyses were open to other interpretations. Nicolaï himself first thought the object might be military, the Canjuers base being nearby.
The anomalous case
This is the rare case in which a national space agency's scientists treated a UFO landing as a forensic problem and came back with numbers. Samples were taken by gendarmes within about a day, and GEPAN's analysis reported that the soil had been compressed by a mechanical pressure of around four to five tonnes and heated to roughly 300-600 °C, with trace phosphate and zinc deposits; analysis of wild alfalfa near the site, led by biochemist Michel Bounias, reported chlorophyll levels 30-50 percent lower than expected. GEPAN's joint investigation with the gendarmerie lasted two years without finding a conventional cause, and Popular Mechanics called it perhaps the most completely and carefully documented sighting of all time. Nicolaï was a single, unremarkable witness who did not seek publicity.
The strongest argument that this was something genuinely unknown or classified, with each claim attributed to the person who made it.
Documents
- GEIPAN case file 1981-01-00849, Trans-en-Provence official, cnes-geipan.fr
Sources
- Trans-en-Provence case Wikipedia
- Trans-en-Provence, France, Physical Trace Case - January 8, 1981 The Black Vault (case file, reproducing gendarmerie and GEPAN material)
- April 21st: The Trans-en-Provence UFO Case (Jean-Michel Abrassart) 365 Days of Astronomy / CosmoQuest
- The Trans-en-Provence trace (Éric Maillot critique, reproduced) Patrick Gross, UFOs at Close Sight
- GEIPAN: France's Official UAP Unit UAPedia
Witness reports elsewhere
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