The Belgian UFO Wave: Triangle Sightings, F-16s, and One Famous Photo

On a cold November night in 1989, two Belgian police officers parked on a hillside road near the town of Eupen and stared up at something that made no sense. A huge, silent, triangular shape hung in the sky, a bright spotlight glowing at each corner and a red light pulsing in the middle. It made no engine noise at all. Back at the station, the dispatcher who took their call later joked, "It made no noise. We joked about it and said it might be Santa Claus trying to land" (The Week). Nobody was laughing for long. Over the next five months, thousands of ordinary people, police officers, and even fighter pilots would join those two cops in seeing something Belgium still cannot fully explain.

The Documented Facts

The wave began on the evening of November 29, 1989, near Eupen in eastern Belgium. The two gendarmes who made the first report were named Heinrich Nicoll and Hubert von Montigny, and theirs was far from the only call that night. By some counts, at least 30 separate groups and three police patrols reported a triangular craft in the same few hours (The Week).

That was just the opening. From late November 1989 through April 1990, the sightings kept coming. The descriptions were strikingly consistent: a large, slow-moving, perfectly silent triangle with white lights at its three corners. The investigation by the Belgian UFO study group SOBEPS gathered roughly 2,000 written witness statements over the course of the wave (The Week). This was not a handful of excitable teenagers; the witnesses spanned every walk of life, including police and military personnel.

The single most famous night was March 30–31, 1990. Ground radar stations picked up an unidentified target, and around 11 p.m. the Belgian Air Force scrambled two F-16 fighter jets from Beauvechain Air Base to investigate (Wikipedia). Over roughly the next hour, the pilots attempted nine separate interceptions. On three occasions their onboard radar managed to lock onto a target for a few seconds, registering wild changes in speed and altitude that no normal aircraft could match (Wikipedia). Yet here is the catch that often gets dropped from the dramatic retellings: the pilots never actually saw anything with their own eyes.

The official face of the case was Colonel (later Major General) Wilfried De Brouwer, then the air force's chief of operations. At a packed press conference at the Ministry of Defence on July 11, 1990, he showed the public computerized images from the F-16 radar and chose his words carefully: "We cannot explain the nature of the craft, but we are certain it was not a figment of imagination" (OpenMinds.tv). De Brouwer had already quietly ruled out the obvious mundane suspect. Suspecting a secret U.S. stealth test, he asked the American Embassy directly, and was told no USAF stealth aircraft were operating in the area during that period (The Week).

Then comes the famous picture. For decades, the defining image of the Belgian wave was the "Petit-Rechain photograph," a sharp shot of a dark triangle with three glowing corner lights and a central glow, taken in April 1990. In 2011, a man named Patrick Maréchal went public and confessed it was a fake. He said he had built the "craft" from a panel of painted polystyrene foam fitted with lights. As he put it, "We made the model with polystyrene, we painted it, and then we started sticking things to it, then we suspended it in the air... then we took the photo" (The Week; Bad UFOs).

The Genuine Open Question

Here is where it gets genuinely murky. The hoax confession seems to close the case, but it only closes one photo, not the whole wave. And even that photo is disputed.

Take the F-16 radar data first. After detailed analysis, investigators concluded the strange radar locks that night were most likely caused by a well-known atmospheric phenomenon called Bragg scattering, with several of the "impossible" returns turning out to be the two jets accidentally locking onto each other (Wikipedia). That sounds like a clean debunk. But De Brouwer himself pushed back on the idea that it explained everything, noting that on at least one occasion a ground radar and an F-16 radar appeared to detect the same contact at the same time, which "weakens the theory that all radar contacts were caused by electromagnetic interference" (OpenMinds.tv).

The photo is muddier still. Maréchal later claimed his 2011 confession had itself been staged, alleging he had been paid to declare the image a hoax, and he reportedly could not cleanly reproduce the picture using the method he described (The Week). So we are left with a confessed fake that the confessor then partly un-confessed. Wonderful.

Strip it all back and the honest core question is this: after the hoaxes, the radar glitches, and the misidentifications are subtracted, is there a real residue left? The people closest to the data thought so. SOBEPS investigator Patrick Ferryn admitted that among the roughly 2,000 reports there remained "a residue, which we simply can't explain" (The Week). What that residue actually was, more than 35 years later, nobody has proven.

Theories and Interpretations

A secret military aircraft (speculation, unproven). The tidiest explanation is that witnesses saw a classified flying-wing or stealth prototype, the silent triangle matching the shape of aircraft like the B-2. The trouble is that the United States officially denied flying such craft over Belgium, and in 1990 no known aircraft could hover silently or perform the maneuvers some witnesses described (The Week). It remains a plausible guess, not a documented fact.

Misperception and a feedback loop of expectation (speculation). Skeptics argue that once newspapers printed the first triangle reports, ordinary lights, planes, and stars got reinterpreted as the same craft, while the dramatic radar numbers came from instrument errors like Bragg scattering (Wikipedia). Notably, De Brouwer rejected pure mass hysteria, saying the witnesses "were sincere and honest" (The Week). A real wave can still contain many honest mistakes.

An extraterrestrial or otherwise unknown craft (unproven, fringe). This is the headline-grabbing version: a genuine alien or unidentified anomalous phenomenon (UAP). It is important to be blunt here. There is no physical proof of extraterrestrial visitors at all, and the wave's single most iconic piece of "evidence," the Petit-Rechain photo, was confessed as a foam-and-lights hoax. The alien interpretation rests on eyewitness testimony and an unexplained data residue, not on any recovered object, and it stays firmly in the realm of speculation.

Sources & Further Reading

• Belgian UFO wave — Wikipedia
• "30 years later, we still don't know what really happened during the Belgian UFO wave" — The Week
• "Belgium's Flying Triangle Wave" — OpenMinds.tv
• "'Classic' UFO Photo from Belgian Wave — the Hoaxer Confesses" — Bad UFOs (Robert Sheaffer)

The Belgian triangle was eventually photographed, chased by jets, and partly explained away, and still nobody can fully account for it. But it was hardly the only time a whole country looked up and swore it saw the same impossible shape gliding overhead. The question worth asking next is why these silent black triangles keep appearing in the sky, decade after decade, in places thousands of miles apart.