1981 · Trans-en-Provence, Var, France
Trans-en-Provence: the GEPAN ground-trace case
Gendarmerie photo of the circular trace (TV still) · Gendarmerie nationale; TV still via Patrick Gross
When8 January 1981, about 17:00
WhereTrans-en-Provence, Var, France
Backing4 independent
Witnesses1 named
Evidenceofficial records, documents, physical traces
In their own words
“l'engin avait la forme de deux assiettes renversées, l'une contre l'autre. Il devait mesurer environ un mètre cinquante de hauteur. Il avait la couleur du plomb.”
Renato Nicolaï, witness, gendarmerie statement, 9 January 1981 · source
On the afternoon of 8 January 1981, Renato Nicolaï, a former building worker on an invalidity pension who was working on a pump shelter behind his house, heard a faint whistle. He saw a lead-coloured object shaped like two inverted plates come down onto a terrace on his property. It stayed only moments, then rose and left toward the north-east. Next morning he showed his wife a circular mark on the ground. A neighbour alerted the gendarmerie, who examined the marks and took soil and plant samples on 9 January. GEPAN, the UAP unit of the French space agency CNES, collected more plant samples on 17 February. GEPAN had soil and vegetation analysed by several laboratories, including the biochemist Michel Bounias at INRA Avignon. Its Note Technique nº 16 (1 March 1983) concluded that the analyses showed "an event of great magnitude" involving mechanical deformation, heating (below 600°C) and possibly trace deposits of material, and that the plant samples showed distance-graded biochemical changes. It also stated that these results did not definitively confirm the witness's account. Sceptics (Michel Figuet in 1995; Rossoni, Maillot and Déguillaume in 2007) argue the marks were tyre skids and the case a hoax. That is proposed, not demonstrated. GEIPAN is reported to classify the case as "D" (unexplained after investigation). I could not load the GEIPAN case page to confirm this.
Evidence, in date order (4)
- 1981Soil and plant samplesphysicallaboratory analyses showing distance-graded biochemical changes CNES/GEPAN, Note Technique nº 16 (1 March 1983)
- 9 Jan 1981Gendarmerieofficialexamined the marks and took soil and plant samples the next day CNES/GEPAN, Note Technique nº 16 (1 March 1983)
- 1 Mar 1983GEPAN (CNES)documentNote Technique 16: an event of great magnitude with mechanical deformation and heating CNES/GEPAN, Note Technique nº 16 (1 March 1983)
- 1991Michel Bounias (INRA Avignon)witnessbiochemist who analysed the plants and saw no other cause than what was described David Rossoni, Éric Maillot, Éric Déguillaume, Les OVNI du CNES (2007)
How plausible · High
An official space-agency study found physical traces and plant changes at the landing site; a hoax is proposed, not demonstrated.
- ●●Access Direct observation or instruments.
- ●●No gain sought Nothing to gain.
- ●●Checkable details check out Released official records.
- ●●Fits the documented skeleton Fits the documented record.
- ●●Physical traces or official reaction Instrument data or physical traces.
- ●○Cost of speaking Named on record.
Plausibility weighs how well an account fits where secrecy hides the documents by design, so missing records never count against it. Strength measures what is documented. Assessed 2026-10-23.
On the record
- Gendarmerie PV of 9 January 1981 (firsthand witness statement, extract in NT16 §3.1): "Hier, 8 Janvier 1981 … Il était environ 17 heures … Mon attention a été attirée par un léger bruit, une sorte de petit sifflement … j'ai vu en l'air un engin qui se trouvait à la hauteur d'un gros pin." "l'engin avait la forme de deux assiettes renversées, l'une contre l'autre. Il devait mesurer environ un mètre cinquante de hauteur. Il avait la couleur du plomb." When it lifted off he saw underneath "quatre ouvertures par lesquelles ne s'échappait ni flamme ni fumée"; he was about 30 m away; it left toward the north-east. "Je n'ai ressenti aucun trouble de la vue ou de l'ouie." He had been on an invalidity pension since a 1973 heart attack and had not worked since November 1979.
- Gendarmerie description of the traces (official, quoted in NT16 §4.2): "deux cercles concentriques l'un de 2,20 m de diamètre, l'autre de 2,40 m … une couronne de 10 centimètres d'épaisseur … deux parties diamétralement opposées de 0,80 m environ … qui présentent des stries noires semblables à des traces de ripage." The phrase about tyre skid marks is the gendarmes' own comparison.
- Investigation timeline (NT16 §1): The gendarmerie was alerted by the neighbours and arrived on 9 January at about 11:30. It took photos, a soil sample (P1) and plant samples. GEPAN learned of the case on 12 January. Heavy rain fell on 10-11 January. GEPAN did not go at once and asked the gendarmerie to send samples to the labs. The gendarmes took control plant samples on 23 January. GEPAN visited on 17 February, 40 days after the event, and took 8 plant samples (E1-E8) along one line plus a soil control (P2).
- GEPAN's witness assessment (NT16 §3.3-3.4): Single witness; no other witness was found. His various accounts differ mainly in wording, which GEPAN attributes more to the interviewers than to the witness. He thought it was "sans doute un engin militaire", pointing to a large military training camp nearby. The anonymised note calls it "JOUVAN"; my guess is that this means Canjuers, but that is unverified. GEPAN found no sign of invention or exaggeration, but noted that "l'absence de preuve n'étant pas … la preuve de l'absence".
- Air activity (NT16 §5.2): The army aviation (ALAT) reported one Alouette II helicopter over the area at about 200 m altitude around 16:30 local on 8 January. At that camp, the only notable activity was short-range inert tank-gun firing more than 25 km to the north.
- Soil analyses (NT16 §6; labs: SNEAP Boussens, Université Paul Sabatier / Rangueil, LPMIA Faculté de Metz, LDP Pau). Findings: compaction and surface striation, with a flint fragment cut and polished; no organic combustion residues from hydrocarbon engines (SNEAP); iron or iron oxide in micron-thick streaks on limestone grains; phosphate and zinc traces, and a polymeric carbon matrix "analogous to … certain polymers or petroleum residues" (Metz); a monocrystalline compound absent from the control sample; heating, but "dont la valeur n'a pas excédé 600°".
Claims
The object was metallic, heavy (estimates ranging from 500-700 kg to 4-5 tonnes) and emitted pulsed microwavesanalysisSourced, unconfirmedJean-Jacques Velasco (later head of SEPRA) in later books (*Ovnis, la science avance*; *Ovnis : l'évidence*, 2004), as quoted by Rossoni, Maillot and Déguillaum
Je ne vois pas quoi d'autre que ce qui a été décrit par M. Nicolaï aurait pu produire ces effets-làanalysisSourced, unconfirmedMichel Bounias (TV, 1991), quoted by Rossoni and colleagues.
In a 1989 TV programme, the witness said "J'ai vu… c'est un conte disons ! … moi aussi dans la nuit je rêve", which sceptics read as a veiled admission (firsthand (broadcast), as transcribed by Éric Maillot)firsthandSourced, unconfirmedchain: broadcast, then Maillot, then Rossoni and colleagues (2007). I did not hear the broadcast; the meaning is disputed, and the quotation in isolation does n
Within 48 hours the witness told private investigators (Thomas Savelli, Paul Monnier) that the object hit the terrace wall and caused a small rockfallRendleshamCash-Landrum: the burning diamond and the helicopters at HuffmansecondhandSourced, unconfirmedas reported by Rossoni and colleagues; not in NT16.
The witness told his wife on the evening of the sighting that aliens had brought back their missing catsecondhandSourced, unconfirmedRossoni and colleagues, as an indication of his joking character; source chain not given in the pages read.
A neighbour said she saw and heard nothing from her garden that evening, and the mayor called the story a "mascaradesecondhandSourced, unconfirmedquoted by Rossoni and colleagues from the press.
Where
Trans-en-Provence, Var, France
43.5°N 6.5°E
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Sources
- CNES/GEPAN, Note Technique nº 16 (1 March 1983)
- GEIPAN case page (not readable from here)
- David Rossoni, Éric Maillot, Éric Déguillaume, *Les OVNI du CNES : 30 ans d'études officielles 1977-2007* (book-e-book, 2007), ch. 13 "Trans-en-Provence (1981)"
- French Wikipedia, "Affaire de Trans-en-Provence" (orientation only)