# The Belgian UFO Wave [View on uap.fun]() Case file 006 · 1989–1990 Gendarmes beneath a triangle of lights. Months of reports. Two F-16s chasing radar returns through a Belgian night. ![Illustration of two late-1980s Belgian gendarmes beside a patrol car watching three unresolved white lights and one red light above a dark rural field.]() Not a real photo. ## At a glance - **Date:** November 29, 1989–April 1990 - **Location:** Eupen, Wallonia, and central Belgium - **Classification:** Multi-witness wave and military intercept - **Record status:** Mixed record; core sightings unresolved - **Last updated:** September 16, 2026 at 1:18 PM CDT - **Source review:** September 16, 2026 · Reviewed annually or when significant records emerge ## The story ### Three lights beside the road At about 5:20 p.m. on November 29, 1989, two members of the Eupen gendarmerie, Heinrich Nicoll and Hubert von Montigny, were driving toward Kettenis when a brilliant light drew their attention to a field. In the account assembled by Belgian investigators, they maneuvered their patrol car to meet its path and watched it stop, turn, and move back toward Eupen. They later described a dark, flat, triangular mass: a white light near each corner and a red light pulsing near the center. The officers followed, reported by radio, and repeatedly reacquired lights over the next several hours. Their experience became the opening scene of Belgium’s most famous UFO wave. ### A long watch over Eupen The patrol’s story did not end with one glimpse. The officers contacted their station, checked with nearby aviation authorities, and continued toward Lake Gileppe. There they reported a bright object hanging over the landscape, sending out narrow shafts or smaller lights, while other gendarmerie patrols and civilian groups supplied their own observations. Exact descriptions and timings vary among the early report, later interviews, and SOBEPS’s reconstruction. That matters: the celebrated image of one seamless three-hour pursuit is a synthesis of several viewpoints, not a single continuous film or instrument record. ### A wave gathers around the first night Reports spread across French- and German-speaking Belgium during the winter of 1989–1990. Many witnesses described slow, low lights arranged as triangles; others reported a dark shape between them, a faint hum, hovering, or sudden departure. SOBEPS—the Belgian Society for the Study of Space Phenomena—opened files, interviewed witnesses, solicited further reports, and eventually published two large volumes. Police testimony gave the story unusual public credibility. Media attention also changed the observing environment: people watched the sky, remembered earlier lights, and submitted reports days or weeks after the event. The resulting archive is rich, but it is not a census of simultaneous, independently documented craft. ### The Air Force chooses to cooperate The Belgian Air Force did not announce an extraterrestrial conclusion. It did, however, treat unidentified traffic as an airspace question. Col. Wilfried De Brouwer, then chief of operations on the Air Staff, became the service’s public voice. The Air Force exchanged information with the gendarmerie and SOBEPS, checked proposed aircraft explanations, and devised a stricter trigger for interception: corroboration from observers and radar before launching fighters. Earlier scrambles had failed to put pilots in visual contact with an unknown object. The policy set the stage for the night that would define the wave. ### March 30: lights south of Brussels At 11:00 p.m. on March 30, 1990, the Control Reporting Center at Glons received a call from gendarme Albert Renkin at Ramillies. He described three unusually bright lights toward Thorembais-Gembloux, changing among red, green, and yellow while holding a triangular arrangement. Glons asked the Wavre gendarmerie for confirmation. Patrols reported lights, and controllers received intermittent radar contacts in the same broad area. The official chronology records uncertainty at every step—visual reports, radar returns that appeared and vanished, and positions that did not always match—yet the combined picture was sufficient to order two F-16s from Beauvechain Air Base into the air. ### Two fighters enter the dark The F-16s took off shortly after midnight. Guided by Glons, they made repeated approaches during roughly the next hour. The surviving Air Force chronology lists thirteen airborne radar contacts and three brief lock-ons. One recorded sequence seemed extraordinary when read literally: a target changing speed and altitude faster than a conventional aircraft should. But the pilots never saw a corresponding object, even when their instruments suggested one was nearby. Ground witnesses continued to describe lights while the jets crossed the sky, and the different systems did not produce one continuous, mutually confirmed track. ### The instrument drama outlives the chase The fighters landed after 1:00 a.m.; gendarmes near Wavre reported the remaining lights fading or separating by about 1:30. No aircraft, debris, photograph, or physical trace closed the night. The dramatic radar values nevertheless became the wave’s technical centerpiece. At a July 1990 press conference, De Brouwer presented the operation and selected radar material while emphasizing that the evidence did not establish abnormal air activity. Later engineering analysis associated with Lt. Col. Salmon examined the F-16 data and found that tracking and filtering behavior could create apparent extreme maneuvers without requiring a craft to perform them. ### A photograph becomes the icon A dark triangle with four glowing points soon became the wave’s visual emblem. Known as the Petit-Rechain photograph, it seemed to give solid form to the witnesses’ descriptions and was studied for years. In July 2011, Patrick Maréchal told Belgian television that he and a friend had made it with a painted piece of polystyrene, small lights, and a string. The confession removed the most famous image from the evidentiary record. It did not retroactively erase what police and civilians reported months earlier; it did show how one staged photograph could harden a complicated wave into a single, misleading picture. ### Helicopters, stars, and a country looking up The serious conventional case is cumulative rather than singular. Renaud Leclet and colleagues argued that military helicopters could explain a number of low, slow triangular-light reports, especially when traffic, wind, or distance masked engine noise. Other analyses point to Venus or bright stars for stationary lights, aircraft and advertising projectors for some clusters, atmospheric radar echoes, and social reinforcement after extensive coverage. These proposals do not prove that every report had the same cause. They challenge the assumption that thousands of later reports must describe one vehicle or one phenomenon. ### What remains after the triangle dissolves The Belgian wave is best preserved as a layered historical event. On one layer are sincere witnesses, including on-duty police, describing unfamiliar lights and apparent structures. On another are official actions: calls, patrols, radar operators, scrambles, and a public military briefing. A third layer contains later analysis, disputed interpretation, and a famous hoax. The archive establishes that unusual reports prompted a real national response. It does not establish that one enormous craft crossed Belgium, that the F-16 data measured impossible flight, or that the source was extraterrestrial. Some individual observations remain unresolved because the surviving evidence cannot identify them more narrowly. ## The evidence ### What the official chronology establishes Major Lambrechts’s report is a near-contemporaneous Air Force chronology of the March 30–31 response. It establishes that gendarmerie reports and radar contacts led to an F-16 scramble, and it records the controllers’ and pilots’ reported observations. It is not raw radar data, a cockpit transcript, or proof that visual and radar events all referred to one object. Its own conclusion separates unexplained observations from a demonstrated vehicle. ### What the radar can and cannot carry The F-16 recording is real evidence of what the fire-control system displayed. Translating a brief, unstable return into the motion of a physical target requires a reliable track, known geometry, calibrated processing, and corroboration. The pilots’ lack of visual contact and later analysis of filter artifacts and atmospheric ‘angel’ echoes make the spectacular speed and altitude values unsafe to treat as measured craft performance. The record supports an intercept of ambiguous returns, not a verified chase of a solid triangle. ### Witness convergence and witness dependence Multiple people reported broadly similar arrangements of lights, and police reports deserve the same careful reading as other firsthand testimony. Similarity alone does not make every account independent. News reports, SOBEPS appeals, repeated interviews, and a shared cultural image influenced when and how later claims were collected. The strongest use of the testimony is to preserve who reported what, where, and when—not to multiply all later estimates into one precise object. ### The photograph is not the wave The Petit-Rechain image is a confessed construction and should not be used as visual evidence for the 1989–1990 sightings. Its failure neither proves nor disproves the independent reports that preceded it. It belongs in the case because it shaped public memory, absorbed years of technical attention, and demonstrates why provenance and chain of custody matter as much as visual impact. ### Classification This file is classified as a mixed record with unresolved core sightings. The official response, witness reports, and recorded radar displays are historically documented. Proposed conventional explanations plausibly cover important portions of the wave, while the available public material cannot reconstruct every observation. ‘Unresolved’ here describes limits in the record; it is not evidence for an extraterrestrial origin. ## Timeline - **29 NOV 1989 · 17:20:** Nicoll and von Montigny report a bright, triangular arrangement near Eupen and begin a prolonged patrol and radio exchange. - **29 NOV · EVENING:** Additional gendarmerie patrols and civilian witnesses report lights around Eupen and Lake Gileppe; later investigation assembles the opening-night cluster. - **DEC 1989–MAR 1990:** Reports continue across Belgium. SOBEPS gathers testimony while the Air Force and gendarmerie exchange information and refine conditions for another intercept. - **30 MAR 1990 · 23:00:** Glons CRC receives Renkin’s report of three unusual lights and asks the Wavre gendarmerie to seek visual confirmation. - **31 MAR · 00:05:** Two F-16s launch from Beauvechain and begin repeated approaches under ground control. - **31 MAR · 00:13–00:40:** The aircraft record intermittent contacts and three brief locks; neither pilot visually identifies an unknown object. - **31 MAR · AFTER 01:00:** The fighters return to base. Ground observers report the remaining lights fading or separating by about 01:30. - **4 APR 1990:** The photograph later known as the Petit-Rechain image is made, becoming the wave’s most reproduced supposed evidence. - **11 JUL 1990:** De Brouwer presents the Air Force’s account and selected radar material at a public press conference in Brussels. - **1991 & 1994:** SOBEPS publishes two volumes documenting witness files, interpretation, and analysis of the Belgian wave. - **26 JUL 2011:** Patrick Maréchal demonstrates on Belgian television that the Petit-Rechain photograph was staged with a small model and lights. ## Sources & interviews - [Report concerning the observation of UFOs in the night from March 30 to March 31, 1990]() — Maj. Lambrechts, Belgian Air Force · Official chronology · 1990 - [Lt. Col. Salmon F-16 Radar Trace Report, Night of 30–31 March 1990]() — Belgian Air Force engineering study · Archival copy indexed by UFO Transparency - [Vague d’OVNI sur la Belgique — Volume 1]() — SOBEPS · 1991 · Witness files and opening-wave investigation - [Vague d’OVNI sur la Belgique — Volume 2]() — SOBEPS · 1994 · Follow-up and radar analysis - [Belgian UFO wave]() — Wikipedia · Orientation and reference trail · Consulted September 16, 2026 - [UFO sightings in Belgium]() — Wikipedia · Related national overview · Consulted September 16, 2026 - [SOBEPS]() — Wikipedia · Organization overview and bibliography · Consulted September 16, 2026 - [Triangles over Belgium]() — Wim Van Utrecht · Caelestia · Critical case reconstruction - [The Belgian Wave of 1989–1992: A Neglected Hypothesis]() — Renaud Leclet et al. · CNEGU · 2008 · Helicopter hypothesis - [The Belgian UFO Wave]() — Brian Dunning · Skeptoid \#538 · September 27, 2016 · Skeptical analysis - [La photo d’un ovni belge célèbre était un trucage]() — Le Figaro · July 28, 2011 · Petit-Rechain confession reporting - [30 years later, we still don’t know what really happened during the Belgian UFO wave]() — Jeva Lange · The Week · March 30, 2020 ## A note on evidence Unidentified describes a limit of the available information. It doesn’t identify an origin. [Next case file: The Phoenix Lights]()