Before 1900
Nuremberg celestial phenomenon
A broadsheet by Hans Glaser describes spheres, crosses, and tubes fighting in the dawn sky over the city; historians read it as a sun-dog display recorded as a religious portent.
Utsuro-bune
A round "hollow ship" washes ashore carrying a strange woman and unreadable script, according to several Edo-period accounts; folklorists treat it as legend.
Read the full story: UFO Sightings in Japan: A History of Unexplained Aerial Phenomena →The mystery airships
Newspapers across the U.S. report cigar-shaped airships with lights and crews years before powered flight; many stories were hoaxes or misidentified stars, and the wave is the UFO era's direct ancestor.
1900–1949
Miracle of the Sun
Tens of thousands see the sun appear to dance and plunge after three children's prophecy; the Church calls it a miracle, ufologists a mass sighting, and scientists an optical effect of staring at the sun.
War of the Worlds radio broadcast · milestone
Orson Welles's Mercury Theatre airs H.G. Wells's Martian invasion as news bulletins; about two percent of listeners hear it, some are frightened, and the next morning's newspapers invent a national panic that textbooks repeat for eighty years.
Read the full story: The War of the Worlds Broadcast of 1938: What Orson Welles Did and Whether Anyone Panicked →Battle of Los Angeles
Anti-aircraft batteries fire 1,400 shells at unidentified targets over the city; nothing is shot down and a lost weather balloon is the accepted trigger.
Read the full story: The Battle of Los Angeles (1942): The Night the City Shot at Nothing →Foo fighters
Allied and Axis aircrews report glowing balls of light pacing their aircraft at night; never explained.
Read the full story: Foo Fighters: The Glowing Balls of Light That Chased WWII Pilots →Ghost rockets
Thousands of reports of rocket-like objects, investigated by Swedish and British intelligence as possible Soviet tests; most are now attributed to meteors.
Kenneth Arnold sighting
Pilot Kenneth Arnold reports nine crescent-shaped objects at 1,700 mph; the press coins "flying saucer" and the modern era begins.
Read the full story: Kenneth Arnold and the First Flying Saucers (June 24, 1947) →Roswell incident
The Army announces a recovered "flying disc," retracts it as a weather balloon the same day, and identifies it as a Project Mogul array in 1994.
Read the full story: The Roswell Incident: What Really Happened in 1947 →Mantell incident
Captain Thomas Mantell dies chasing a large bright object in his P-51, almost certainly a secret Navy Skyhook balloon.
Read the full story: The Mantell Incident (1948): The First Pilot to Die Chasing a UFO →Chiles–Whitted encounter
Two Eastern Air Lines pilots report a wingless, rocket-shaped object with lighted windows passing their DC-3; Project Sign takes it seriously, later analysts propose a bright meteor.
Gorman dogfight
Air National Guard pilot George Gorman chases a small light for 27 minutes; the Air Force concludes it was a lighted weather balloon.
Green fireballs
Repeated green fireballs over nuclear sites prompt Project Twinkle; meteor expert Lincoln LaPaz argues they were not natural, the Air Force says they were.
1950–1974
McMinnville photographs
Farmer Paul Trent photographs a disc over his farm; the two pictures are among the most analyzed in the field and remain disputed between hoax and unknown.
Mariana film
Baseball manager Nick Mariana films two bright objects crossing the sky, the first well-known UFO film; the Air Force suggests jets, the frames show no wings.
Lubbock Lights
Three professors and a student photographer record V-formations of lights; Blue Book proposes plovers, the photos stay unexplained.
Read the full story: The Lubbock Lights (1951): The Photographed V-Formation Over Texas →Washington, D.C. flap
Radar tracks unknowns over the capital on two weekends and jets scramble; the Air Force blames temperature inversions and the CIA convenes the Robertson Panel.
Read the full story: The 1952 Washington, D.C. UFO Flap: When Saucers Buzzed the Capital →Flatwoods Monster
After a meteor, boys and adults report a tall hooded figure with glowing eyes on a hilltop; investigators attribute it to a barn owl and the fireball.
Adamski's Desert Center meeting
George Adamski says a bell-shaped craft lands in the desert and a long-haired Venusian warns him about atomic tests by gesture and telepathy; six companions watching from the road sign an affidavit, and the contactee era begins.
Read the full story: George Adamski: The First Contactee, the Venusians and the Desert Center Meeting of 1952 →The French wave
Hundreds of close-encounter reports across France in a few weeks, including Marius Dewilde's small beings at Quarouble; the largest European wave of the era.
Kelly–Hopkinsville encounter
A farm family says small glowing creatures besieged their house for hours; the leading explanation is great horned owls, and "little green men" enters the language.
Read the full story: The Kelly–Hopkinsville Encounter (1955): The Night of the Little Green Men →Lakenheath–Bentwaters incident
RAF and USAF radars track objects at high speed while interceptors are vectored onto them; the Condon Report calls it the most puzzling radar-visual case it examined.
Antônio Vilas-Boas abduction
A young farmer says he was taken aboard a craft and made to mate with a female being: the first detailed modern abduction account.
Read the full story: The Antônio Vilas-Boas Abduction (1957): The First Modern Abduction Account →Levelland case
More than a dozen drivers report a glowing object that stalls engines and lights; the Air Force blames ball lightning after a one-day inquiry.
Read the full story: The Levelland UFO Case (1957): The Object That Stalled Cars in Texas →Father Gill sighting
Anglican missionary William Gill and dozens of villagers watch a craft with figures on top who wave back at them, two nights running.
Betty and Barney Hill abduction
A couple loses two hours on a mountain road and recovers an abduction under hypnosis: the first famous abduction case and the source of the Zeta Reticuli star map.
Read the full story: Betty and Barney Hill Abduction: The First Documented Alien Abduction →Socorro incident
Officer Lonnie Zamora sees an egg-shaped craft and two figures land and take off, leaving burned brush and landing marks; Blue Book files it as unidentified.
Read the full story: The Socorro Incident (1964): Lonnie Zamora and the Landed Craft →Incident at Exeter
A teenager and two police officers watch a huge object with pulsing red lights over a field; the case became a bestselling book and Blue Book left it unexplained.
Kecksburg incident
A fireball crosses the Great Lakes and residents report an acorn-shaped object recovered by the military from the woods.
Read the full story: The Kecksburg Incident (1965): Pennsylvania's Roswell →Michigan "swamp gas" sightings
Dozens see lights over marshes; Hynek's "swamp gas" explanation becomes a national joke and pushes Congress toward the Condon study.
Read the full story: Project Blue Book: The Air Force's UFO Investigation Program →Westall UFO
Some two hundred students and staff watch a silver object land and take off near their school; a stray radiation-sampling balloon is the leading explanation.
Read the full story: The Westall UFO (1966): Two Hundred Witnesses at an Australian School →Malmstrom AFB incident
Ten Minuteman missiles go offline at once as guards report a glowing object; the shutdown is documented, the UFO link disputed.
Read the full story: The Malmstrom AFB Incident (1967): The UFO That Shut Down Nuclear Missiles →Falcon Lake incident
Prospector Stefan Michalak is burned in a grid pattern by a landed craft's exhaust; investigated by the RCMP and the Condon Committee without explanation.
Read the full story: The Falcon Lake Incident (1967): The Man Burned by a UFO →Shag Harbour incident
An object with lights hits the water; Mounties, boats, and navy divers find only foam. Canada's files still list it as an unsolved UFO.
Read the full story: The Shag Harbour Incident (1967): Canada's Officially Unsolved UFO Crash →Jimmy Carter sighting
The future president and other Lions Club members watch a bright object change color and size; it was most likely Venus, and Carter filed a report in 1973.
Pascagoula abduction
Two fishermen say robot-like beings floated them aboard a craft; a secretly recorded conversation shows them terrified when alone.
Read the full story: The Pascagoula Abduction of 1973: Two Fishermen's Terrifying Encounter →Coyne helicopter incident
An Army Reserve helicopter crew reports a grey object that stops over them and lifts the aircraft nearly 2,000 feet; the case is a favorite of investigators for its four military witnesses.
John Lennon's New York sighting
From the terrace of his East 52nd Street apartment, John Lennon and May Pang watch a flat, round object with a row of lights drift silently over the East River; Lennon prints the date and time on the sleeve of Walls and Bridges.
Read the full story: Musicians Who Saw UFOs: John Lennon, David Bowie, Sammy Hagar, Tom DeLonge, Sun Ra and More →1975–1999
Travis Walton abduction
A logger is struck by a beam in front of six co-workers and is missing for five days; the basis of Fire in the Sky.
Read the full story: The Travis Walton UFO Incident: Fire in the Sky True Story →Tehran incident
Two F-4 Phantoms lose instruments and weapons approaching a bright object; a U.S. DIA report calls the case a classic.
Read the full story: The 1976 Tehran UFO Incident: Iranian F-4s Versus the Object That Killed Their Instruments →Operação Prato
Villagers report beams of light that burn and drain them ("chupa-chupa"); the Brazilian Air Force runs a months-long investigation whose files were released decades later.
Ellsworth AFB missile-site encounter
Security policemen Mario Woods and Michael Johnson report a huge craft and grey beings at a Minuteman site; the second witness first spoke publicly in 2026.
Read the full story: Mario Woods and Michael Johnson: The 1977 Ellsworth AFB Missile-Site Encounter →Valentich disappearance
A young pilot radios that an object is hovering over his Cessna, then vanishes; spatial disorientation is the leading explanation.
Read the full story: The Valentich Disappearance (1978): The Pilot Who Vanished Reporting a UFO →Kaikoura lights
A television crew aboard a cargo flight films lights tracked by radar off the South Island; explanations range from squid-boat lights to Venus.
Robert Taylor incident
A forestry worker says a domed object and two spiked spheres seized him in a clearing; police investigate his torn clothing and it remains Britain's only UFO case treated as a possible assault.
Rendlesham Forest incident
U.S. Air Force personnel from RAF Bentwaters and Woodbridge report lights and a craft in the forest; the Halt memo makes it Britain's Roswell.
Read the full story: The Rendlesham Forest Incident: Britain's Roswell Explained →Cash–Landrum incident
Three people see a diamond-shaped object venting flame with a helicopter escort and fall ill with radiation-like symptoms; their lawsuit is dismissed.
Read the full story: The Cash–Landrum Incident (1980): The UFO, the Helicopters, and the Radiation Burns →Trans-en-Provence case
A retired contractor watches a lead-colored object land in his garden; France's GEPAN finds physical changes in the soil and plants, one of few landing cases with laboratory analysis.
Night of the UFOs
Radar and pilots track some twenty objects and the air force scrambles jets; the defense minister confirms the events on television.
Japan Air Lines Flight 1628
Captain Kenju Terauchi reports two small objects and a huge one shadowing his cargo 747 for fifty minutes, with partial radar confirmation.
Read the full story: UFO Sightings in Japan: A History of Unexplained Aerial Phenomena →Belgian UFO wave
Thousands report large silent triangles; F-16s chase radar contacts; the famous triangle photo is later admitted to be a hoax.
Read the full story: The Belgium UFO Wave of 1989-1990: Thousands of Witnesses →Calvine photograph
Two hikers photograph a large diamond-shaped object beside a jet; the Ministry of Defence holds the pictures for 32 years.
Read the full story: The Calvine UFO Photograph (1990): Britain's Best UFO Picture and Its 32-Year Disappearance →Ariel School incident
Sixty-two schoolchildren report a landed craft and small beings; interviewed by John Mack and revisited in the 2022 film Ariel Phenomenon.
Read the full story: The Ariel School Incident (1994): Sixty Children and the Beings in the Playground →Varginha incident
Three young women see a creature in a vacant lot and the city fills with stories of captured beings; the army says it was a disabled local man.
Read the full story: The Varginha Incident (1996): Brazil's Roswell →Phoenix Lights
Thousands see a V-formation of lights over the state and, later that night, a row of lights over Phoenix identified as flares.
Read the full story: The Phoenix Lights: Mass UFO Sighting Over Arizona in 1997 →2000 to today
Mexican Air Force FLIR incident
A patrol aircraft films eleven infrared objects the crew cannot see; analysts identify oil-platform flares over the horizon.
USS Nimitz "Tic Tac"
Navy pilots led by Cmdr. David Fravor encounter a white oblong object captured on the FLIR1 video; the best-documented modern military case.
Read the full story: The Tic Tac UFO: Navy Pilots' Encounter That Changed Everything →O'Hare Airport sighting
United Airlines employees watch a disc hover over a gate and punch up through the cloud deck; the FAA calls it weather.
Read the full story: The O'Hare Airport UFO (2006): The Disc Over Gate C17 →Stephenville lights
Dozens report a huge silent object with lights; the Air Force first denies, then confirms, that F-16s were flying, and radar data obtained by MUFON shows an unknown track.
Norwegian spiral
A vast blue-white spiral fills the sky; it is a failed Russian Bulava missile test, and it is the clearest example of a spectacular sighting solved within a day.
USS Theodore Roosevelt encounters
Navy pilots report near-daily objects during training and record the Gimbal and GoFast videos, released by the Pentagon in 2020.
Read the full story: Best UFO Sightings Caught on Camera: Most Compelling Video Evidence →AATIP revealed · milestone
The New York Times reports the Pentagon's secret UFO program and publishes the Navy videos; the modern disclosure era begins.
Read the full story: The Pentagon UFO Program: AATIP, AARO, and Official Investigations →ODNI preliminary UAP report · milestone
The intelligence community tells Congress it could explain only one of 144 reports; Congress creates what becomes AARO.
Read the full story: UAP Congressional Hearings: What We Learned About UFOs from Congress →Chinese balloon and the three objects
A Chinese surveillance balloon is shot down, then three unidentified objects, most likely hobby and research balloons, over Alaska, the Yukon, and Lake Huron.
Read the full story: The 2023 High-Altitude Objects: The Chinese Balloon and the Three That Followed →Grusch testimony · milestone
David Grusch tells a House hearing under oath that the U.S. holds retrieved non-human craft and biologics; two Navy pilots testify beside him.
Read the full story: UFO Whistleblowers: David Grusch and Government Insiders Who Spoke Out →New Jersey drone wave
Weeks of reported drones and orbs; federal agencies attribute them to lawful drones, aircraft, and stars.
Read the full story: UFO Orbs Explained: What People Are Seeing, from the Yemen Video to the Jersey Drones →Yemen orb video
A House hearing screens footage of a missile striking a spherical object off Yemen that appears to fly on intact.
Read the full story: UFO Orbs Explained: What People Are Seeing, from the Yemen Video to the Jersey Drones →Matthew Brown immunity request · milestone
The Immaculate Constellation whistleblower publicly asks the President for immunity to say more, as new witnesses come forward.
Read the full story: Matthew Brown, Immaculate Constellation, and What "MMTU" Means →