Branchoria Arnold Sighting Arnold Sighting

A careful look at the pilot report that launched the modern flying saucer era.

Within Belgium UFO Wave

How the Eupen Sightings Started the Wave

The first Eupen-area reports shaped the Belgian UFO story before radar evidence entered the public record.

On this page

  • What police and local witnesses reported
  • How the story spread through media and investigators
  • Why changing descriptions matter
Preview for How the Eupen Sightings Started the Wave

Introduction

The Belgian UFO wave did not begin with military radar tracks or fighter-jet interceptions. It began on a cold November evening in 1989 around the eastern Belgian town of Eupen, near the German border, when police officers and civilians started reporting unusual lights and, in some accounts, a large triangular object moving slowly at low altitude. Those first reports became the foundation of the entire Belgian case. Before the famous March 1990 radar incident entered public debate, the Eupen sightings had already created a national story about apparently credible witnesses, repeated observations, and objects that did not fit ordinary expectations. [2cobeps.org]cobeps.orgbelgian wave 130310Belgian Ufo waveOn 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon in the sky (…) and…Published: November 1989

Eupen Wave illustration 1 What makes the Eupen wave historically important is not simply the claim that “something strange” was seen. It is the way the reports evolved in real time. Police dispatchers, patrol officers, local residents, journalists, and civilian UFO investigators all became involved within days. The result was a rapidly expanding body of testimony that mixed direct observation, media amplification, and later reinterpretation. For supporters of the Belgian wave, Eupen demonstrated that multiple trained observers independently described the same phenomenon. For sceptics, the same sequence showed how stories can grow more elaborate once attention, publicity, and expectation enter the picture. [Wikipedia]WikipediaBelgian UFO waveBelgian UFO wave [Wikipedia]WikipediaWim Van UtrechtWim Van Utrecht

How the First Eupen Night Unfolded

The commonly accepted starting point of the Belgian wave is the evening of 29 November 1989. The earliest reports came from gendarmes patrolling near Eupen. According to later reconstructions, officers initially noticed extremely bright lights over fields outside town. Several witnesses compared the intensity to stadium floodlights. As the patrols continued observing the lights, some witnesses claimed they could distinguish a dark structure around them, usually described as triangular or platform-shaped. [3unsolvedmysteries.fandom.com]unsolvedmysteries.fandom.comBelgium UFO - Unsolved Mysteries Wiki - FandomThe mystery of the Belgium UFOs began on November 29, 1989, just outside of the small town…Published: November 29, 1989 [Unsolved Mysteries]unsolvedmysteries.fandom.comBelgium UFO - Unsolved Mysteries Wiki - FandomThe mystery of the Belgium UFOs began on November 29, 1989, just outside of the small town…Published: November 29, 1989

The most widely repeated version involved officers Heinrich Nicoll and Hubert von Montigny. In later interviews and retellings, they described a large object carrying powerful white lights and a red central beacon while moving slowly and silently above the countryside. Some accounts estimated the object at roughly 100 to 120 metres altitude. Others described a slow pursuit through the Eupen area as the object drifted towards the town. [unsolvedmysteries.fandom.com]unsolvedmysteries.fandom.comBelgium UFO - Unsolved Mysteries Wiki - FandomThe mystery of the Belgium UFOs began on November 29, 1989, just outside of the small town…Published: November 29, 1989 [Unsolved Mysteries]unsolvedmysteries.fandom.comBelgium UFO - Unsolved Mysteries Wiki - FandomThe mystery of the Belgium UFOs began on November 29, 1989, just outside of the small town…Published: November 29, 1989

What gave the incident unusual weight at the time was that the officers were not isolated witnesses. Dispatchers, additional patrols, and local civilians also reported seeing unusual lights that night. Later summaries by Belgian UFO organisations claimed that roughly 150 reports connected to the first evening were eventually gathered. [cobeps.org]cobeps.orgbelgian wave 130310Belgian Ufo waveOn 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon in the sky (…) and…Published: November 1989

The reports, however, were never entirely uniform. Some witnesses described a sharply defined triangular craft. Others saw only intense lights. A few mentioned a humming or turbine-like sound, while later retellings often emphasised total silence. These inconsistencies became one of the defining features of the entire Belgian wave debate. [Wikipedia]WikipediaOleada ovni belgaOleada ovni belga

Why the Police Testimony Carried So Much Weight

Most UFO stories rely on isolated civilian witnesses. The Eupen incident became different because uniformed police officers publicly attached their names and professional credibility to the reports. Belgian media quickly highlighted this fact, presenting the sightings as more serious than ordinary UFO claims. [Discovery UK]discoveryuk.comthe belgian ufo wave close encounter or mass hysteriaDiscovery UKThe Belgian UFO Wave: Close Encounter or Mass Hysteria?3 Sept 2024 — Between November 1989 and March 1990 all over Belgium, U…Published: November 1989

For many observers in Belgium, the presence of gendarmes changed the social status of the story. Police officers were assumed to be disciplined observers accustomed to reporting unusual situations accurately. Their willingness to speak openly made it easier for additional witnesses to come forward during the following weeks. The wave expanded partly because the first reports appeared respectable rather than fringe. [cobeps.org]cobeps.orgbelgian wave 130310Belgian Ufo waveOn 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon in the sky (…) and…Published: November 1989

This credibility effect worked in several directions at once:

  • Witnesses who might otherwise have stayed silent felt safer reporting strange lights.
  • Journalists treated the sightings as a legitimate public-interest story.
  • Civilian investigators from SOBEPS, Belgium’s main UFO research organisation, rapidly mobilised around Eupen.
  • Later witnesses often interpreted ambiguous lights through the framework already established by the first reports. [Wikipedia]WikipediaOpen source on wikipedia.org.

The Eupen sightings therefore mattered not only because of what may have been seen, but because they created a socially credible narrative template: low-flying triangular craft, bright corner lights, slow movement, and calm but puzzled police witnesses.

How Media Coverage Turned a Local Incident into a National Wave

The first Eupen reports spread through Belgian newspapers and television almost immediately. That rapid coverage transformed a regional event into a national phenomenon within days. Once the “triangle” description entered the media, later reports from other parts of Belgium increasingly matched the same pattern. [Discovery UK]discoveryuk.comthe belgian ufo wave close encounter or mass hysteriaDiscovery UKThe Belgian UFO Wave: Close Encounter or Mass Hysteria?3 Sept 2024 — Between November 1989 and March 1990 all over Belgium, U…Published: November 1989

SOBEPS played a major role in collecting and publicising witness accounts. The organisation treated the sightings as potentially important evidence of an unknown aerial phenomenon and encouraged structured testimony gathering. Its investigators interviewed witnesses, mapped locations, and assembled timelines that helped define the Belgian wave narrative for years afterward. [Wikipedia]WikipediaBelgian UFO waveBelgian UFO wave

This media-investigator feedback loop became one of the central disputes surrounding the wave:

  • Supporters argued that widespread publicity encouraged hidden witnesses to report genuine observations.
  • Critics argued that publicity standardised expectations and encouraged people to reinterpret ordinary lights as triangular craft.

Sceptical Belgian writer Wim Van Utrecht later argued that the evolution of the reports showed how stories became more detailed over time. In his reconstruction, early descriptions often focused on lights, while later versions added structural details such as windows, beams, or sharply defined triangular outlines. [Wikipedia]WikipediaWim Van UtrechtWim Van Utrecht

That criticism does not necessarily prove fabrication. Memory often becomes more elaborate after discussion and reflection. But it does show why the chronology of testimony matters so much in the Belgian case. The closer an account is to the original observation, the more valuable investigators generally consider it.

Eupen Wave illustration 2

Why the Changing Descriptions Became a Major Problem

One reason the Eupen sightings remain controversial is that the descriptions were never perfectly stable. Over time, the objects became more detailed, more technologically dramatic, and more consistently triangular in retellings. [Wikipedia]WikipediaOleada ovni belgaOleada ovni belga

Several tensions appeared inside the witness record:

Lights Versus Structured Craft

Some witnesses only saw bright lights against the night sky. Others insisted they saw a solid black triangular body connecting the lights. At night, especially in rural areas, depth perception and contrast can be unreliable. Sceptics argue that observers may have mentally connected separate light sources into a single object. [skeptoid.com]skeptoid.comThe Belgian UFO Wave27 Sept 2016 — The fun began on November 29, 1989 when two gendarmes in Eupen, Belgium saw something in the sky. This…Published: November 29, 1989

Silent Object Versus Audible Machine

Popular retellings often emphasise complete silence, implying something unlike a conventional aircraft. Yet some early reports mentioned mechanical or turbine-like sounds. That detail opened the door to more ordinary explanations, including helicopters or distant aircraft seen under unusual atmospheric conditions. [Wikipedia]WikipediaOpen source on wikipedia.org.

This European UFO Was Spotted by Thousands of People | Belgian UFO Wave

Channel: Red Web · Views: 7.6K · Uploaded: January 2026 · Length: 1 hour 10 minutes

Open on YouTube

Fixed Triangle Versus Variable Shape

Not every witness described the same geometry. Some accounts resembled a platform with lights in a line rather than a clean triangle. Others described square or diamond arrangements. This inconsistency weakened claims that all observers were clearly seeing one distinct craft type. [ufologie.patrickgross.org]ufologie.patrickgross.org29nov1989 eupen eupenmkOn November 29, 1989, in the Eupen region29 Nov 1989 — On November 29, 1989, at 07:15 p.m., in Eupen, a witness saw something motionless…Published: November 29, 1989

The importance of these changing descriptions goes beyond simple contradiction. They reveal how quickly a developing UFO story can acquire shared imagery. Once the “black triangle” concept became culturally dominant during the Belgian wave, later reports increasingly reflected it.

The Competing Explanations That Emerged Early

The Eupen sightings produced competing interpretations almost immediately, long before the later radar controversy.

Extraordinary Craft Hypothesis

Supporters of the UFO interpretation argued that multiple independent witnesses, including police officers, described the same unusual behaviour: low altitude, slow movement, hovering capability, abrupt manoeuvres, and unusually bright lighting systems. The consistency of certain core details across many reports became the main argument that something genuinely unexplained had occurred. [cobeps.org]cobeps.orgbelgian wave 130310Belgian Ufo waveOn 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon in the sky (…) and…Published: November 1989

Eupen Wave illustration 3

Misidentification and Expectation Effects

Sceptics argued that the first wave displayed classic characteristics of a socially amplified UFO flap. Once media attention intensified, ordinary lights, aircraft, stars, helicopters, and atmospheric effects were increasingly interpreted within the same narrative framework. Belgian sceptic Marc Hallet later described the wave as a form of mass suggestion amplified by media and UFO organisations. [Wikipedia]WikipediaOpen source on wikipedia.org.

Experimental Aircraft Speculation

Another explanation that circulated early involved secret military aircraft. The triangular descriptions led some observers to speculate about stealth aircraft, especially because the B-2 Spirit stealth bomber was entering public awareness around the same period. However, no evidence has ever shown that experimental American aircraft were operating over eastern Belgium during the first Eupen sightings. [Reddit]reddit.comIt was later titled "The Belgian UFO Wave". Phenomena.Read moreRedditSome of the most credible and widespread sightings…January 27, 2021 — Some of the most credible and widespread sightings of UFO…Published: January 27, 2021

Importantly, none of these explanations fully resolved every witness account. That unresolved quality helped keep the Belgian wave alive in public memory long after the first reports faded.

How Eupen Shaped the Rest of the Belgian UFO Wave

The Eupen sightings established nearly every major element that later defined the Belgian wave:

  • The triangular imagery.
  • The emphasis on police witnesses. [reddit.com]reddit.combelgian ufo wave 19891990 imagine authenticityBelgian UFO Wave 1989-1990 Imagine Authenticity?One of the first police officer witnesses draws one that looks like the Henrardi photo (t…
  • Reports of hovering and slow silent movement.
  • The role of SOBEPS as a central investigator.
  • The debate between sincere testimony and media-driven amplification.
  • The idea that Belgium was experiencing a coordinated nationwide phenomenon. [Wikipedia]WikipediaOpen source on wikipedia.org. [Wikipedia]WikipediaOpen source on wikipedia.org.

By the time the Belgian Air Force became publicly associated with the case months later, the core mythology of the wave already existed. Eupen created the emotional and narrative framework through which later sightings were interpreted.

That is why the first witness wave remains historically important. The radar events of March 1990 may have made the Belgian UFO wave internationally famous, but the public imagination of giant triangular craft over Belgium was built in the fields and roads around Eupen during the very first nights of reporting.

Amazon book picks

Further Reading

No matched book cards were available for How the Eupen Sightings Started the Wave, so this fallback keeps a direct Amazon reading path visible.

Topical books

UFO research books

Browse books, explainers and reference titles related to this topic.

Search Amazon

Related search

UFO sightings books

Browse books, explainers and reference titles related to this topic.

Search Amazon

Related search

UAP books

Browse books, explainers and reference titles related to this topic.

Search Amazon

As an Amazon Associate I earn from qualifying purchases.

eBay marketplace picks

Marketplace Samples

Example marketplace items related to this page. Use the search link to explore similar finds on eBay.

Using USA
Browse more on eBay.com

Example items shown for inspiration; availability and pricing can change. Branchoria may earn a commission if you purchase through outbound eBay links.

Browse more on eBay.co.uk

Example items shown for inspiration; availability and pricing can change. Branchoria may earn a commission if you purchase through outbound eBay links.

Endnotes

  1. Source: Wikipedia
    Title: Belgian UFO wave
    Link: https://en.wikipedia.org/wiki/Belgian_UFO_wave

  2. Source: cobeps.org
    Title: belgian wave 130310
    Link: https://www.cobeps.org/pdf/belgian_wave_130310.pdf
    Source snippet

    Belgian Ufo waveOn 29 November 1989, fourteen gendarmes of the Eupen region had observed a strange aerial phenomenon in the sky (...) and...

    Published: November 1989

  3. Source: Wikipedia
    Title: Wim Van Utrecht
    Link: https://fr.wikipedia.org/wiki/Wim_Van_Utrecht

  4. Source: Wikipedia
    Title: Oleada ovni belga
    Link: https://es.wikipedia.org/wiki/Oleada_ovni_belga

  5. Source: unsolvedmysteries.fandom.com
    Link: https://unsolvedmysteries.fandom.com/wiki/Belgium_UFO
    Source snippet

    Belgium UFO - Unsolved Mysteries Wiki - FandomThe mystery of the Belgium UFOs began on November 29, 1989, just outside of the small town...

    Published: November 29, 1989

  6. Source: unsolved.com
    Title: Mysteries Belgian UFO
    Link: https://unsolved.com/gallery/belgian-ufo/
    Source snippet

    Unsolved MysteriesBelgian UFO - Unsolved MysteriesThe mystery of the Belgian UFOs began on November 29, 1989, near the small town of Eupe...

    Published: November 29, 1989

  7. Source: ufologie.patrickgross.org
    Title: 29nov1989 eupen eupenmk
    Link: https://ufologie.patrickgross.org/be/29nov1989-eupen-eupenmk.htm
    Source snippet

    On November 29, 1989, in the Eupen region29 Nov 1989 — On November 29, 1989, at 07:15 p.m., in Eupen, a witness saw something motionless...

    Published: November 29, 1989

  8. Source: skeptoid.com
    Link: https://skeptoid.com/episodes/538
    Source snippet

    The Belgian UFO Wave27 Sept 2016 — The fun began on November 29, 1989 when two gendarmes in Eupen, Belgium saw something in the sky. This...

    Published: November 29, 1989

  9. Source: discoveryuk.com
    Title: the belgian ufo wave close encounter or mass hysteria
    Link: https://www.discoveryuk.com/mysteries/the-belgian-ufo-wave-close-encounter-or-mass-hysteria/
    Source snippet

    Discovery UKThe Belgian UFO Wave: Close Encounter or Mass Hysteria?3 Sept 2024 — Between November 1989 and March 1990 all over Belgium, U...

    Published: November 1989

  10. Source: Wikipedia
    Link: https://en.wikipedia.org/wiki/SOBEPS

  11. Source: reddit.com
    Title: It was later titled “The Belgian UFO Wave”. Phenomena.Read more
    Link: https://www.reddit.com/r/UnresolvedMysteries/comments/l62z80/some_of_the_most_credible_and_widespread/
    Source snippet

    RedditSome of the most credible and widespread sightings...January 27, 2021 — Some of the most credible and widespread sightings of UFO...

    Published: January 27, 2021

  12. Source: reddit.com
    Title: belgian ufo wave 19891990 imagine authenticity
    Link: https://www.reddit.com/r/UFOs/comments/10pienf/belgian_ufo_wave_19891990_imagine_authenticity/
    Source snippet

    Belgian UFO Wave 1989-1990 Imagine Authenticity?One of the first police officer witnesses draws one that looks like the Henrardi photo (t...

  13. Source: reddit.com
    Title: ufo wave in belgium 1990 see comments
    Link: https://www.reddit.com/r/aliens/comments/mz2svw/ufo_wave_in_belgium_1990_see_comments/
    Source snippet

    (See comments): r/aliensA 1990 article was written by veteran UFO researcher and journalist, Bob Pratt. The article was entitled “The Gr...

  14. Source: ufologie.patrickgross.org
    Title: 29nov1989 eupenmrs
    Link: https://www.ufologie.patrickgross.org/be/29nov1989-eupenmrs.htm
    Source snippet

    November 29, 1989, in the Eupen area29 Nov 1989 — The witness is a brigadier of the “water and forests” public service designated as “Mr...

    Published: November 29, 1989

  15. Source: vocal.media
    Title: The Belgian UFO wave | History
    Link: https://vocal.media/history/the-belgian-ufo-wave
    Source snippet

    One of the most famous incidents occurred on November 29, 1989, when two police officers in Eupen, Belgium, observed a large...

    Published: November 29, 1989

  16. Source: ufo-timeline.com
    Link: https://www.ufo-timeline.com/belgian-ufo-wave/
    Source snippet

    Belgian UFO wave | UFO TimelineThe Belgian UFO wave was a series of hundrets of UAP sightings in Belgium, which lasted from 29 November 1...

Additional References

  1. Source: facebook.com
    Title: between 1989 and 1990 belgium witnessed one of the most credible ufo events in h
    Link: https://www.facebook.com/tassilosieben/posts/between-1989-and-1990-belgium-witnessed-one-of-the-most-credible-ufo-events-in-h/1391619912964825/
    Source snippet

    Between 1989 and 1990, Belgium witnessed one of the...*Notable Events:* - *November 29, 1989:* Two police officers in Eupen reported see...

    Published: November 29, 1989

  2. Source: facebook.com
    Link: https://www.facebook.com/BrusselsTimes/posts/the-belgian-ufo-reporting-centre-has-been-analysing-strange-aerial-phenomena-in-/1349348273899074/
    Source snippet

    The Belgian UFO Reporting Centre has been analysing...The Belgian UFO wave, Eupen, 1989 / 90. Multiple police, air control & airforce wi...

  3. Source: theweek.com
    Title: 30 years later still dont know what really happened during belgian ufo wave
    Link: https://theweek.com/articles/905215/30-years-later-still-dont-know-what-really-happened-during-belgian-ufo-wave
    Source snippet

    The WeekThe Belgian UFO wave, 30 years later30 Mar 2020 — At first, the witnesses claimed, all you noticed were the lights. They were so...

  4. Source: facebook.com
    Link: https://www.facebook.com/BrusselsTimes/posts/after-a-week-of-multiple-sightings-and-disruptions-across-europe-belgium-last-ni/1261942662639636/
    Source snippet

    *November 29, 1989:* Two police officers in Eupen reported seeing a large, triangular object with bright lights moving...Read more...

    Published: November 29, 1989

  5. Source: medium.com
    Title: the belgian ufo wave europes most credible alien mystery 94a4d8d48292
    Link: https://medium.com/%40JS_UFO_ART/the-belgian-ufo-wave-europes-most-credible-alien-mystery-94a4d8d48292
    Source snippet

    The Belgian UFO Wave: Europe's Most Credible Alien...Between 1989 and 1991, over 3,000 individual UFO sightings were reported across Bel...

  6. Source: sufon.co.uk
    Title: the belgian wave 1
    Link: https://www.sufon.co.uk/post/the-belgian-wave-1
    Source snippet

    THE BELGIAN WAVE25 Sept 2025 — This "observation" (no ufo was actually seen) was simultaneously reported to SOBEPS by the Amay gendarmeri...

  7. Source: youtube.com
    Link: https://www.youtube.com/watch?v=JfqWcCv2Lc8
    Source snippet

    Eupen And The Belgian UFO WaveIn 1989 and 1990, Belgium was gripped by a wave of UFO sightings. What was really happening in the Belgian...

  8. Source: youtube.com
    Link: https://www.youtube.com/watch?v=SbQhrIRCs-c
    Source snippet

    This European UFO Was Spotted by Thousands of People...Exploring the phenomenon of the early 1990s when thousands of people spotted the...

  9. Source: youtube.com
    Title: The Belgian UFO Wave
    Link: https://www.youtube.com/watch?v=0qF041w57wI
    Source snippet

    Investigation of the Eupen UFO Sightings...

    Published: November 29, 1989

  10. Source: youtube.com
    Title: Investigation of the Eupen UFO Sightings
    Link: https://www.youtube.com/watch?v=Vl3s4-mJ410
    Source snippet

    Belgian UFO Wave Witness Accounts...

Topic Tree

Follow this branch

Parent topic

Belgium UFO Wave

Related pages 2