UNRESOLVED
CF-GEI-19890101162 UNRESOLVED
The Saint-Martin-de-Boscherville Cylinder
CASE FILE — CF-GEI-19890101162 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
1989-01-12
Location Reported location of the sighting or event
Saint-Martin-de-Boscherville, Seine-Maritime, Haute-Normandie, France
Duration Estimated duration of the observed phenomenon
Several seconds
Object Type Classification of the observed object based on witness descriptions
cylinder
Source Origin database or archive this case was sourced from
geipan
Witnesses Number of known witnesses who reported the event
1
Country Country where the incident took place
FR
AI Confidence AI-generated credibility score based on source reliability, detail consistency, and corroboration
85%
On the evening of January 12, 1989, a lone female driver encountered an extraordinary aerial phenomenon while traveling near marshlands in Saint-Martin-de-Boscherville, a commune in the Seine-Maritime department of Haute-Normandie. At approximately 30 meters altitude above the marshes, she observed what she described as an "enormous" cylindrical object featuring distinctive structural characteristics: a dome at its apex emitting yellow light, and a series of luminescent portholes or windows displaying red and white lights along its base. The object was completely silent despite its proximity and apparent size.
The encounter took a particularly unusual turn when the object suddenly extinguished all its lights as it passed over or near the witness's position. Mere seconds later, the object reappeared—its lights reactivated—but now positioned much higher in the sky, suggesting either rapid vertical ascent or some form of instantaneous repositioning. The entire observation lasted only a few seconds, leaving the witness with a brief but vivid encounter. The witness's vehicle location near marshland suggests she may have been on Route de la Fontaine or another road bordering the wetlands characteristic of this region along the Seine valley.
GEIPAN, France's official UAP investigation agency operated by CNES (National Centre for Space Studies), conducted a formal investigation but was unable to collect additional witness testimony or identify the phenomenon. The case received a "D" classification in GEIPAN's taxonomy, indicating an unidentified case with sufficient strangeness and reliability to merit this designation, but insufficient data for conclusive analysis.
02 Timeline of Events
Evening, January 12, 1989
Initial Sighting
Female driver observes enormous cylindrical object hovering approximately 30 meters above marshlands near Saint-Martin-de-Boscherville
+2-3 seconds
Object Details Observed
Witness notes dome at apex emitting yellow light and series of red and white luminescent portholes at base. Object completely silent
+4-5 seconds
Lights Extinguish
As object passes over or near witness position, all lights suddenly extinguish completely
+6-8 seconds
Reappearance at Altitude
Object's lights reactivate seconds later, now positioned much higher in the sky, suggesting rapid vertical movement
Following days
GEIPAN Investigation
Official investigation launched by France's CNES-GEIPAN. Investigators unable to locate additional witnesses or identify phenomenon
Post-investigation
Classification D Assigned
Case classified as 'D' (unidentified) by GEIPAN due to insufficient data for identification despite investigation efforts
03 Key Witnesses
Anonymous Witness 1
Civilian driver
medium
Female motorist traveling near marshlands in Saint-Martin-de-Boscherville on the evening of January 12, 1989. Provided testimony to GEIPAN investigators.
"Une forme cylindrique 'énorme' comportant au sommet une coupole émettant une lumière jaune et une série de hublots luminescents rouges et blancs à sa base."
04 Analyst Notes -- AI Processed
This case presents several elements that warrant serious analytical consideration. The witness was engaged in the routine activity of driving, which generally correlates with reliable observation conditions—the witness was sober, alert, and had no apparent motive for fabrication. The object's described features (domed cylinder with structured lighting, complete silence, apparent control) don't align well with conventional aircraft, particularly given the 1989 timeframe and rural French location. The altitude of approximately 30 meters is remarkably low for any aircraft, and the complete silence at such proximity is anomalous for helicopters or fixed-wing craft.
The most intriguing aspect is the reported behavior: the object extinguishing its lights during closest approach, then reappearing at significantly higher altitude moments later. This suggests either intentional response to the witness's presence or correlation with the vehicle's movement, though causation cannot be established. The brief duration (seconds) is both a strength and weakness—it reduces the possibility of misidentification of distant conventional objects, but also limits the data available for analysis. GEIPAN's inability to locate corroborating witnesses despite investigation efforts is notable, though a nighttime sighting over marshland would naturally have limited potential observers. The "D" classification from a credible government scientific organization adds weight to the case's legitimacy as a genuine unknown.
05 Theory Comparison
BELIEVER ANALYSIS
Unconventional Aerial Vehicle
The observed object exhibits characteristics inconsistent with 1989-era conventional technology: complete silence at low altitude, structured craft with dome and illuminated portholes, and apparent rapid vertical movement or instantaneous repositioning. The light extinction during closest approach suggests possible awareness of the witness. The cylindrical shape with dome matches numerous UAP reports globally. GEIPAN's inability to identify the phenomenon despite professional investigation supports this being a genuinely anomalous craft.
SKEPTIC ANALYSIS
Misidentified Conventional Aircraft
The object could have been a helicopter or small aircraft with unusual lighting performing maneuvers at dusk. The 'extinction' might have been the craft banking away, obscuring lights from the witness's perspective, while the altitude change could be misperception due to the brief observation window and lack of reference points over marshland. However, this theory struggles to explain the complete silence at 30 meters altitude and the witness's description of structured features.
Atmospheric Phenomenon or Optical Effect
Marsh gas, ball lightning, or atmospheric optical phenomena over wetlands could create unusual light displays. The 'extinction and reappearance' might be multiple separate events misperceived as a single object. However, this fails to account for the structured description (cylinder, dome, portholes) and the apparent controlled behavior.
06 Verdict
ANALYST VERDICT
The Saint-Martin-de-Boscherville incident remains genuinely unidentified with moderate confidence in the strangeness of the phenomenon observed. The case lacks the multiple witness corroboration or physical evidence that would elevate it to high priority, but the witness's coherent account of structured craft features, anomalous behavior (light extinction/rapid repositioning), and complete silence at low altitude resists conventional explanation. Helicopter or aircraft misidentification is unlikely given the silence and described maneuvers. The brief duration prevents extensive analysis but also reduces prosaic explanations like celestial bodies or distant lights. What makes this case significant is its classification by GEIPAN—France's rigorous scientific approach to UAP investigation—as a "D" (unidentified), indicating that professional investigators found no conventional explanation despite attempting to do so. However, the single-witness nature and seconds-long observation limit our ability to draw firm conclusions about the phenomenon's nature or origin.
AI CONFIDENCE SCORE:
85%
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