The Belgian UFO wave was a series of purported sightings of triangular UFOs in Belgium, which lasted from 29 November 1989 to April 1990.
The Belgian UFO wave began in November 1989. The events of 29 November would be documented by thirty different groups of witnesses, and three separate groups of police officers. All the reports related a large object flying at low altitude. The craft was of a flat, triangular shape, with lights underneath. This giant craft did not make a sound as it slowly moved across the landscape of Belgium. There was free sharing of information as the Belgian populace tracked this craft as it moved from the town of Liege to the border of the Netherlands and Germany.
The Belgian UFO wave peaked with the events of the night of 30–31 March 1990. On that night, unknown objects were tracked on radar, chased by two Belgian Air Force F-16s, photographed, and were sighted by an estimated 13,500 people on the ground – 2,600 of whom filed written statements describing in detail what they had seen. Following the incident, the Belgian air force released a report detailing the events of that night.
At around 23:00 on 30 March, the supervisor for the Control Reporting Center (CRC) at Glons received reports that three unusual lights were seen moving towards Thorembais-Gembloux, which lies to the southeast of Brussels. The lights were reported to be brighter than stars, changing color between red, green and yellow, and appeared to be fixed at the vertices of an equilateral triangle. At this point, Glons CRC requested the Wavre gendarmerie send a patrol to confirm the sighting.
Approximately 10 minutes later, a second set of lights was sighted moving towards the first triangle. By around 23:30, the Wavre gendarmerie had confirmed the initial sightings and Glons CRC had been able to observe the phenomenon on radar. During this time, the second set of lights, after some erratic manoeuvres, had also formed themselves into a smaller triangle. After tracking the targets and after receiving a second radar confirmation from the Traffic Center Control at Semmerzake, Glons CRC gave the order to scramble two F-16 fighters from Beauvechain Air Base shortly before midnight. Throughout this time, the phenomenon was still clearly visible from the ground, with witnesses describing the whole formation as maintaining their relative positions while moving slowly across the sky. Witnesses also reported two dimmer lights towards the municipality of Eghezee displaying similar erratic movements to the second set of lights.