The Belgian UFO wave was a series of sightings of triangular UFOs in Belgium, which lasted from 29 November 1989 to April 1990. The sightings The Belgian UFO wave began in November 1989. Reports were filed, most many weeks after the events. Many of the reports related a large object flying at low altitude. Some reports also stated that the craft was of a flat, triangular shape, with lights underneath. The Belgian UFO wave peaked with the events of the night of 30–31 March 1990. On that night, one unknown object was tracked on radar, and two Belgian Air Force F-16s were sent to investigate, with neither pilot reporting seeing the object. No reports were received from the public on the date. But over the next 2 weeks reports from 143 people who claimed to have witnessed the object were received, all of them after the event. Over the ensuing months, many others claimed to have witnessed these events as well. 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. Glons CRC requested the Wavre gendarmerie send a patrol to confirm the sighting. Approximately 10 minutes later, some later reports stated that a second set of lights were seen, moving towards the first triangle. Traffic Center Control at Semmerzake tracked one object only on its radar, and an order to scramble two F-16 fighters from Beauvechain Air Base was given. Throughout this time, in reports after the event, some people claim that the phenomenon was visible from the ground, describing the whole formation as maintaining their relative positions while moving slowly across the sky. Over the next hour, the two scrambled F-16s attempted nine separate interceptions of the targets. On three occasions, they managed to obtain a radar lock for a few seconds, but these were later shown to be Radar-locks on each other. The pilots never reported seeing any of the claimed sightings, saw none of the claimed manoeuvres, and never got a lock on any objects apart from the other F16. The other contacts were all found to be the result of a well-known atmospheric interference called Bragg scattering. After 00:30, radar contact became much more sporadic