What Really Happened During Belgium's UFO Wave?
Belgium’s place in UFO history rests chiefly on the extraordinary wave of reports that began in late 1989. Police officers, civilians and military personnel described low-flying lights or large triangular forms, especially across eastern and central Wallonia.
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Introduction
Belgium therefore offers neither a solved extraterrestrial encounter nor a collection of wholly meaningless stories. It is a valuable case study in how sincere eyewitness reports, official concern, imperfect sensor data, media attention and mistaken or fabricated evidence can combine into a lasting national mystery.
Before the Belgian wave
Belgian reports did not begin in 1989. One well-known earlier story came from Lotenhulle, now part of Aalter, where Marin Vandercruyssen said that he and other people saw five large silver discs on 21 July 1955. A roadside memorial was installed decades later, turning the account into local folklore, but inconsistencies in the remembered weather and other details weakened its value as historical evidence. The monument was removed at the family’s request in 2025.[The Times]thetimes.co.ukThe Times Belgian UFO sighting memorial removed at family's requestThe marble stone, which had been restored earlier in 2025 to mark the 70th anniversary of the event, honored Vandercruyssen’s claim that…
Such earlier cases survive mainly through personal testimony, newspaper coverage and privately assembled catalogues rather than through a comprehensive government archive. That distinction matters. A catalogue entry confirms that somebody reported an event; it does not, by itself, establish that the reported object was physically present or accurately described.
Belgium nevertheless developed a substantial civilian research tradition. The Société belge d’étude des phénomènes spatiaux, usually known as SOBEPS, collected reports, interviewed witnesses and published two large volumes on the later wave. After SOBEPS dissolved in 2007, the Belgian Committee for the Study of Space Phenomena, or COBEPS, continued parts of its work, including the preservation and investigation of Belgian cases. A separate Dutch-language Belgian UFO Reporting Centre also collects contemporary reports, particularly from Flanders.[cobeps.org]cobeps.orgOpen source on cobeps.org.
Why the 1989–90 wave became exceptional
The decisive sequence began on 29 November 1989 around Eupen, close to Belgium’s borders with Germany and the Netherlands. Two gendarmes, Hubert von Montigny and Heinrich Nicoll, reported seeing an illuminated object that they interpreted as a large triangular platform. They followed or re-observed unusual lights over an extended period, while other police officers and civilians in the region submitted broadly similar accounts. SOBEPS-linked catalogues record roughly 150 notifications for that evening, although the precise number varies according to whether separate witnesses, locations or episodes are counted as individual cases.[cobeps.org]cobeps.orgBelgian Ufo waveMarch 11, 2013 — On 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon. The wave reached i…
Reports continued through December and into 1990. Common descriptions included three bright lights arranged in a triangle, sometimes with a red or orange light near the centre; slow movement; hovering; and surprisingly little noise. Concentrations appeared around Eupen and Liège before spreading into Brabant, the Brussels area, Namur and communities around La Louvière. Civilian catalogues show that southern and central Belgium generated much of the wave’s material, while fewer reports came from Flanders and the far south of Luxembourg province.[cobeps.org]cobeps.orgBelgian Ufo waveMarch 11, 2013 — On 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon. The wave reached i…
The numbers often quoted for the wave require caution. SOBEPS and successor researchers assembled hundreds of investigated reports and more than a thousand notifications across the broader 1989–93 period. One catalogue records 454 cases in 1989, 447 in 1990 and rapidly declining totals thereafter. These are reporting statistics, not counts of confirmed anomalous vehicles. Some entries were poorly documented, some involved several witnesses to the same stimulus, and some were later assigned ordinary explanations.[cobeps.org]cobeps.orgBelgian Ufo waveMarch 11, 2013 — On 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon. The wave reached i…
Even so, the opening phase cannot be dismissed merely because the witnesses had heard UFO stories. Several police observations appear to have preceded the national media explosion, and the authorities treated at least some reports as possible aviation or security matters. The more difficult question is whether the witnesses accurately inferred a single solid triangle from lights seen at night. Human vision readily connects separate lights into a perceived outline, especially when distance, size and background references are missing.
What happened during the F-16 interception
The most consequential incident occurred during the night of 30–31 March 1990. Reports reached the Control Reporting Centre at Glons of bright lights near Thorembais-Gembloux, south-east of Brussels. A gendarmerie patrol was asked to check the observation, and military controllers received intermittent radar indications. Two F-16 fighters were launched from Beauvechain Air Base.[Wikipedia]WikipediaBelgian UFO waveBelgian UFO wave
The scramble is an established fact, but many retellings exaggerate what it demonstrated. The fighters attempted several interceptions and recorded brief radar contacts, yet neither pilot visually observed a corresponding craft. The returns did not provide a continuous track of one object moving through Belgian airspace. Some apparent locks were associated with the other fighter, while sceptical technical analyses have attributed additional returns to propagation effects, interference or anomalous radar behaviour.[Wikipedia]WikipediaBelgian UFO waveBelgian UFO wave
Claims that an object repeatedly accelerated from very low speed to extreme or supersonic velocity arise from treating short, unstable radar indications as a coherent physical trajectory. Without continuous tracking, independent range confirmation and visual correlation, successive returns cannot safely be assumed to represent the same target. The episode established that controllers and pilots encountered unexplained indications while responding to reports from the ground; it did not establish that a craft outran the F-16s.
The Belgian Air Force’s willingness to discuss the incident gave it greater credibility than most UFO stories. Colonel Wilfried De Brouwer, then responsible for Air Staff operations, publicly described the investigation and did not accuse the witnesses of fabrication. At the same time, the available military conclusion was limited: the Air Force had insufficient information to identify a physical object responsible for all the reports. Official attention should therefore be understood as evidence of uncertainty and responsible air-defence procedure, not as official confirmation of an extraterrestrial vehicle.[Wikipedia]WikipediaVague belge d'ovnisVague belge d'ovnis
The evidence that survived scrutiny
The Belgian wave contains several kinds of evidence, and they should not be treated as interchangeable.
Confirmed events include the receipt of numerous reports, observations by serving police officers, exchanges between civilian investigators and military authorities, radar indications on 30–31 March, and the launch of two F-16s. These facts show that the wave was socially and operationally real.
Contested evidence includes witness estimates of enormous size, very low altitude, silence and extraordinary performance. Such details may be accurate in individual cases, but night observations without known distance make physical dimensions and speed exceptionally difficult to calculate. Similar descriptions across reports can reflect a common stimulus, but they can also be shaped by publicity, repeated questioning and the growing cultural template of the “Belgian triangle”.
Debunked or substantially weakened evidence includes several episodes with identifiable conventional causes. During one December 1989 alert in Limburg, pilots saw beams associated with lighting or a laser display reflecting from cloud. Other Belgian reports have been linked to aircraft, helicopters, astronomical objects, balloons, satellites and unusual atmospheric viewing conditions.[Wikipedia]WikipediaVague belge d'ovnisVague belge d'ovnis
This mixed record explains why sweeping verdicts are unhelpful. Saying that every witness invented a triangle goes beyond the evidence. Saying that hundreds of witnesses independently confirmed the same engineered craft also goes beyond it. The reports varied in quality, and the surviving documentation does not turn them into one scientifically verified event.
How the famous photograph collapsed
The Petit-Rechain photograph became the wave’s defining image. It appeared to show three bright corner lights and a central light against a dark background, seemingly matching the triangular objects described by witnesses. Because there was no visible landscape, horizon or reliable scale, however, analysts could not determine the photographed object’s distance or size. The picture could represent something large and distant, or something small and close to the camera.
In July 2011, Patrick Maréchal said that he and others had fabricated the scene using a triangular piece of polystyrene fitted with lights and photographed it against the night sky. Reuters and Belgian media reported the confession, and COBEPS president Patrick Ferryn accepted that the image was fraudulent while arguing that one false photograph did not invalidate the wider wave.[reuters.com]reuters.combelgian hit ufo image was polystyrene says forger id USTRE76Q2DEBelgian hit UFO image was polystyrene, says forger27 Jul 2011 — A Belgian UFO photograph that became a worldwide hit was faked wit…
Later online claims have alleged that Maréchal withdrew or was paid to make his confession, but they have not supplied comparably strong, independently verified documentation. The responsible evidential position remains that the photograph is a confessed hoax. Its earlier survival through technical examination is instructive: image enhancement can reveal patterns within a photograph, but it cannot establish scale or authenticity when the scene contains no external reference and the provenance is weak.
The exposure of the picture does not prove that every Belgian report was false. It does remove what was once presented as the most persuasive photographic support for a solid black triangle. No remaining image from the wave offers an unambiguous, well-scaled and independently authenticated view of the reported craft.
Competing explanations
No single conventional explanation accounts neatly for every Belgian report. The principal interpretations instead operate at different levels.
The structured-craft interpretation holds that at least some witnesses saw a real, unconventional vehicle. Its strongest points are the police testimony, the repeated triangular-light pattern and reports of slow, quiet movement. Its weakness is the lack of high-quality photographs, physical traces or a continuous multisensor track. The F-16 data do not supply that missing confirmation.
The misidentified-aircraft interpretation proposes that helicopters, aeroplanes or several lights viewed together generated many reports. Helicopters can hover and move slowly, while their sound may be weak or carried away from an observer by wind. Critics respond that some witnesses reported objects at apparently close range and remained convinced that no familiar aircraft matched what they saw. The hypothesis is plausible for part of the wave but cannot be demonstrated case by case without flight logs, precise geometry and weather data.[cobeps.org]cobeps.orgernage reporternage report
The astronomical and atmospheric interpretation is particularly relevant to reports consisting only of distant lights. Bright planets, stars seen through moving cloud, unusual refraction and searchlights projected onto low cloud can appear to change colour or move erratically. Such explanations become less persuasive where witnesses reported a sharply defined nearby structure, although those structure estimates themselves remain vulnerable to perceptual error.
The psychosocial interpretation treats the wave as an interaction between initial ambiguous sightings, intensive publicity and a recognisable cultural image. Once triangular UFOs dominated Belgian news, observers were more likely to notice unfamiliar lights, interpret them as triangles and report them. Sceptical researchers have argued that this process can produce clusters of sincere, mutually reinforcing testimony without mass dishonesty or hallucination. SOBEPS-associated researchers dispute that account, noting that some early reports were collected before the triangle had become a fully established media template.[Academia]academia.eduPDF) The Beginning of the Belgian UFO wavePDF) The Beginning of the Belgian UFO wave
These mechanisms are not mutually exclusive. A credible reconstruction can include genuine but ordinary aircraft, astronomical objects, lighting displays, perceptual completion, social reinforcement, occasional faulty radar returns and deliberate hoaxes. The existence of unresolved cases means that the original stimulus cannot always be identified; it does not mean that the most extraordinary explanation becomes the default.
Records, archives and reliability
Belgium’s UFO record is unusually extensive but institutionally fragmented. The most detailed case files were largely created by civilian organisations rather than by a permanent national investigative agency. SOBEPS interviews and field reports remain central to the historical record, while COBEPS maintains research material and the Catalogue of Belgian Observations. The catalogue applies basic requirements such as a reasonably known date and location, and it records weather, narrative details and assessments where available.[cobeps.org]cobeps.orgBelgian Ufo waveMarch 11, 2013 — On 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon. The wave reached i…
These archives are valuable, especially where they preserve early testimony, but they are not neutral state databases. Investigators sometimes favoured unconventional interpretations, witness interviews were not always conducted under uniform protocols, and later publications mixed raw testimony with argument. Sceptical reconstructions have their own limitations when they propose an aircraft, helicopter or psychological explanation without enough case-specific data to prove it.
The Belgian Air Force material has greater official authority but much narrower scope. It documents operational responses and technical observations, not a complete investigation of every civilian claim. Reproduced summaries of the March 1990 incident are widely available, but the public source trail is less orderly than readers may expect from references to a single “official Belgian report”. Copies, translations, retrospective statements and civilian reproductions are often cited alongside one another.
A useful reliability hierarchy is therefore:
- contemporaneous operational records, original photographs with verifiable provenance and calibrated sensor data;
- early, independently recorded statements from identified witnesses;
- detailed civilian investigations with dates, maps, weather checks and alternative explanations;
- retrospective summaries, media reconstructions and aggregated case counts;
- anonymous photographs, later memories and unsupported online claims.
Much of the Belgian wave falls in the middle of this scale: substantial enough to deserve analysis, but not strong enough to establish an exotic vehicle.
Today’s Belgian sightings
Belgium continues to receive hundreds of reports in some years, but the character of modern cases differs from the 1989–90 wave. The Dutch-language reporting centre recorded 227 reports in 2023, followed by 161 in 2024 and 237 in 2025. COBEPS separately collected reports from French-speaking Belgium, so the organisations’ totals should not simply be combined as though they used identical geographical coverage and classification methods.[The Brussels Times]brusselstimes.comreports of ufos sightings on the rise in belgium with spike reported in marchreports of ufos sightings on the rise in belgium with spike reported in march
The apparent regional imbalance between Flanders and Wallonia partly reflects reporting infrastructure, language, publicity and population distribution rather than a demonstrated geographical concentration of anomalous objects. In 2023, the Flemish centre received more than 220 reports, while COBEPS reported 48. Earlier figures likewise showed more submissions from Flanders, but separate organisations and differing public visibility make direct comparisons difficult.[The Brussels Times]brusselstimes.commore ufo reports in flanders but fewer in french speaking belgium in 2023more ufo reports in flanders but fewer in french speaking belgium in 2023
Most contemporary reports that can be resolved involve ordinary sources. Bright planets and stars remain common, while aircraft, drones, balloons, lanterns and insects close to cameras create additional confusion. Starlink satellite formations generated a new class of reports after 2019: soon after launch, the satellites may appear as a procession of evenly spaced lights, while reflected sunlight can make individual satellites flare unexpectedly. Belgian investigators have suggested that growing public familiarity with Starlink may explain why its contribution to report totals has begun to decline.[brusselstimes.com]brusselstimes.comufo sightings drop in belgium unexplainedufo sightings drop in belgium unexplained
A residue of reports remains unidentified because the information is inadequate, not necessarily because the event resisted every plausible explanation. A blurred light recorded without direction, exact time, original metadata or observer position may be impossible to reconstruct. In UFO statistics, “unexplained” often means “insufficient evidence for identification”, rather than “evidence of an unknown technology”.
What Belgium’s UFO history actually establishes
Belgium experienced an exceptional reporting wave, concentrated particularly in Wallonia and centred on the winter of 1989–90. Its historical importance comes from the involvement of police witnesses, the scale of civilian documentation and the unusually transparent military response. Those features make it stronger than a lone anecdote and more informative than folklore alone.
The case nevertheless falls short of proving that a single large triangular craft crossed the country. The strongest military episode lacked visual confirmation from the intercepting pilots and did not produce a stable, continuous radar track. The best-known photograph was fabricated. Other incidents were linked to lighting displays or remain susceptible to aircraft, astronomical, atmospheric and perceptual explanations.
The fairest conclusion is that the Belgian wave was a collection of different events interpreted through a rapidly consolidating shared image. Some individual observations remain unresolved, particularly where apparently credible witnesses gave detailed accounts. What remains unresolved is the original cause of those specific experiences—not the broader proposition that Belgium documented an extraterrestrial or technologically impossible aircraft.
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Endnotes
1.
Source: cobeps.org
Title: Belgian Ufo wave
Link:https://www.cobeps.org/pdf/belgian_wave_130310.pdf
Source snippet
March 11, 2013 — On 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon. The wave reached i...
Published: March 11, 2013
2.
Source: reuters.com
Title: belgian hit ufo image was polystyrene says forger id USTRE76Q2DE
Link:https://www.reuters.com/article/lifestyle/belgian-hit-ufo-image-was-polystyrene-says-forger-idUSTRE76Q2DE/
Source snippet
Belgian hit UFO image was polystyrene, says forger27 Jul 2011 — A Belgian UFO photograph that became a worldwide hit was faked wit...
3.
Source: cobeps.org
Link:https://www.cobeps.org/en/home.html
4.
Source: Wikipedia
Link:https://en.wikipedia.org/wiki/SOBEPS
5.
Source: cobeps.org
Link:https://www.cobeps.org/pdf/Ramillies.pdf
6.
Source: Wikipedia
Title: Vague belge d’ovnis
Link:https://fr.wikipedia.org/wiki/Vague_belge_d%27ovnis
7.
Source: Wikipedia
Title: Belgian UFO wave
Link:https://en.wikipedia.org/wiki/Belgian_UFO_wave
8.
Source: badufos.blogspot.com
Title: “Classic” UFO Photo from Belgian Wave
Link:https://badufos.blogspot.com/2011/07/classic-ufo-photo-from-belgian-wave.html
9.
Source: cobeps.org
Title: ernage report
Link:https://cobeps.org/pdf/ernage_report.pdf
10.
Source: academia.edu
Title: (PDF) The Beginning of the Belgian UFO wave
Link:https://www.academia.edu/4321342/The_Beginning_of_the_Belgian_UFO_wave
11.
Source: arxiv.org
Link:https://arxiv.org/abs/2403.08155
12.
Source: arxiv.org
Title: arXiv Extreme Flaring of Starlink Satellites
Link:https://arxiv.org/abs/2405.13091
13.
Source: skepticalinquirer.org
Link:https://skepticalinquirer.org/wp-content/uploads/sites/29/2011/03/p57.pdf
Source snippet
Skeptical Inquirer'Unexplained' Cases—Only If You Ignore All Explanationsfamous Belgian UFO wave of 1989, as written by Major General Wil...
14.
Source: thetimes.co.uk
Title: The Times Belgian UFO sighting memorial removed at family’s request
Link:https://www.thetimes.co.uk/article/belgian-ufo-sighting-memorial-removed-at-familys-request-7mmv2bbqh
Source snippet
The marble stone, which had been restored earlier in 2025 to mark the 70th anniversary of the event, honored Vandercruyssen’s claim that...
15.
Source: brusselstimes.com
Title: reports of ufos sightings on the rise in belgium with spike reported in march
Link:https://www.brusselstimes.com/1904444/reports-of-ufos-sightings-on-the-rise-in-belgium-with-spike-reported-in-march
16.
Source: brusselstimes.com
Title: ufo sightings drop in belgium unexplained
Link:https://www.brusselstimes.com/1375246/ufo-sightings-drop-in-belgium-unexplained
17.
Source: brusselstimes.com
Title: more ufo reports in flanders but fewer in french speaking belgium in 2023
Link:https://www.brusselstimes.com/859309/more-ufo-reports-in-flanders-but-fewer-in-french-speaking-belgium-in-2023
Additional References
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Source: ufomeldpunt.be
Link:https://ufomeldpunt.be/contact/pers
Source snippet
persOp deze pagina kan u een overzicht vinden van alle artikels die over het meldpunt werden gepubliceerd alsook van interviews gegeven v...
19.
Source: youtube.com
Title: Belgian General Reveals Top Secret UFO Files
Link:http://www.youtube.com/watch?v=pTRkk-IkmpQ
Source snippet
Belgian UFO wave documentary The Belgium UFO That Defied Physics (S4) | The Proof Is Out There | History HISTORY...
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Source: youtube.com
Link:http://www.youtube.com/watch?v=GegAPC_yEUM
Source snippet
DEEP DIVE: Belgium UFO Wave - What Really Happened 35 Years Later...
21.
Source: youtube.com
Title: DEEP DIVE: Belgium UFO Wave
Link:http://www.youtube.com/watch?v=RuFsvd72nDw
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UFO Europe Untold Stories - National Geographic...
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Source: youtube.com
Title: The Belgium UFO That Defied Physics
Link:http://www.youtube.com/watch?v=aWbo0x1lJAk
Source snippet
The Unsolved Belgian UFO Wave Mystery Sightings from 1989 till 1991...
23.
Source: youtube.com
Title: UFO Europe Untold Stories
Link:http://www.youtube.com/watch?v=BgsOpEsq-IY
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Belgian General Reveals Top Secret UFO Files...
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Source: youtu.be
Title: Finding UFO
Link:https://youtu.be/taGuuHv5Bsc
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National Geographic - UFO Europe Untold Stories - Episode 7 (2012) Low Flying Aircraft...
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Source: ufoevidence.com
Title: UFO Evidence The Belgian UFO Wave
Link:https://ufoevidence.com/case/the-belgian-ufo-wave/
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Source: telegraph.co.uk
Title: ufo sightings belgium rocket
Link:https://www.telegraph.co.uk/news/2019/01/03/ufo-sightings-belgium-rocket/