Large silent triangles

During the 1989–1990 Belgian wave, two F-16s chased a triangular object that produced nine radar locks and computed accelerations of 46G; General De Brouwer presented the data publicly. The best multi-sensor dataset documented by a NATO air force.

Twenty-two witnesses across five Yukon communities watched a huge, silent object over the Klondike Highway for three hours; later cartographic reconstruction traced a coherent ~300 km trajectory, incompatible with coordinated perceptual error.

Thousands of witnesses watched a triangular formation drift over Phoenix; a second event that night was explained as military flares, while the first remains unexplained. Governor Symington mocked the case in 1997 and years later said he had seen the object himself.

Dozens of witnesses — including a constable — reported a large, silent object over Stephenville, Texas; FAA primary radar data obtained via FOIA correlated a track heading toward the restricted airspace of the presidential ranch.

Between 1983 and 1986, some 5,000 people across the Hudson Valley (New York and Connecticut) reported a large, silent triangular object with structured lights —the "Westchester Boomerang"— among them IBM engineers, state police and FAA controllers. It is the most-witnessed sustained UAP event in the U.S., cited without dispute by NICAP, CUFOS and MUFON.

In the early hours of January 5, 2000, between 4:00 and 4:30 a.m., an enormous silent triangular object with brilliant white lights and a red beacon was tracked at low altitude by at least five on-duty police officers from several jurisdictions in St. Clair County, Illinois — Lebanon, Shiloh, Millstadt, Dupo — a few kilometers from Scott Air Force Base. The officers kept radio contact while tracking the object, and the calls were preserved in dispatch records. One of the best-documented triangle cases for the quality and independence of the witnesses.

France's largest UFO wave: on the night of 5 November 1990, thousands of witnesses across the country saw a large, dark, silent 'triangle' cross the sky from southwest to northeast. It was the atmospheric re-entry of the third stage of a Soviet Proton rocket, identified within days by SEPRA and independent satellite trackers.

In October 2023, around 10:50 PM, a married couple sitting on their back porch in Colorado Springs watched a silent, nearly transparent triangular object pass overhead, from northeast to southwest, with a silvery-blue band of light on its trailing edge. The witness —familiar with USAF aircraft and military drones from living near an airport— said it looked like nothing he'd seen before. The entire observation lasted about four seconds, too brief to photograph. The FBI took his statement in January 2026.

One night in June or July 2011, two people in a car leaving their driveway watched a massive black triangle pass low overhead heading north, a car-sized white light at each corner, emitting a low, pulsing hum. They estimated its dimensions at roughly 200 by 100 feet, about 800 feet up. The object disappeared behind the treeline in 10-15 seconds, leaving no contrail, before they could film it. The FBI took both witnesses' statements in April 2025 — nearly fourteen years after the event.

In October 2023, an aviation enthusiast working a night shift in Colorado Springs watched a black equilateral triangle, the size of a parking lot, emerge from a stationary, 'pixelated' gray cloud, a red light at each corner. It flew at helicopter speed, then accelerated almost instantly to Mach 1-2, banked sharply in the direction opposite a conventional aircraft, and vanished surrounded by heat-mirage-like waves. Calling his wife a minute later, she noted his voice sounded 'robotic,' as if there were electronic interference. It's the second FBI/PURSUE file describing a triangle over the same city in the same month.

A commercial airline pilot and Air Force reservist gave a statement to the FBI in March 2024 about recurring white lights he has observed since October 2023 on transatlantic and transcontinental flights — up to ten at once, with brightness cycles from seconds to a minute — which, per his account, other pilots discuss openly over radio. In February 2024 he managed to film them from the cockpit, with the flight panel showing Mach 0.80 and his exact position near Sioux Falls. In the same interview he recounted a second event, twenty years earlier: a giant, silent triangle crossing the sky over Bagram, Afghanistan, in 2002, also seen by another pilot.