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The Ghost Rockets (Spökraketer), Scandinavia, 1946
July 19, 1946 · Lake Kölmjärv, Överkalix, Norrbotten, Sweden (wave across Sweden, Finland, Norway and Denmark)
UAP · Cigar · 54 sources · 3 photos
86Well documented
The Colares Flap and Operação Prato
1977 · Colares, Bay of Marajó, Pará
UAP · Orb / light · 72 sources · 12 photos
72Well documented
The 1973 UFO Flap: The Autumn of Aliens
c. 1973 · Southern and Midwestern United States (Mississippi, Louisiana, Alabama, Georgia, Tennessee, Ohio, Indiana)
UAP · Other · 37 sources
69Well documented
Roswell Incident
July 8, 1947 · Foster ranch, about 30 miles south of Corona, New Mexico (announced from Roswell Army Air Field)
UAP · Disc / saucer · 80 sources · 6 photos
64Well documented
The Enfield Poltergeist
c. 1977 · 284 Green Street, Brimsdown, Enfield, North London
Paranormal · Other · 50 sources · 9 photos
59Partially documented
Billy Meier's Pleiadian Beamships
January 28, 1975 · Frecht nature reserve (Betzholz area), near Hinwil, Zürcher Oberland, Canton Zurich
UAP · Disc / saucer · 104 sources · 1 photos
56Partially documented
The 1978 Italian UFO Wave
1978 · Across Italy, especially the central and southern Adriatic coast, Sicily, Calabria, Liguria and Piedmont
UAP · Disc / saucer · 35 sources · 1 photos
55Partially documented
The Seaford Poltergeist ("Popper"), Herrmann House, Long Island, 1958
February 3, 1958 · Herrmann house, Seaford, Town of Hempstead, Nassau County, Long Island, New York
Paranormal · Other · 36 sources · 2 photos
55Partially documented
Rendlesham Forest Incident
December 26, 1980 · Rendlesham Forest, between RAF Woodbridge and RAF Bentwaters, Suffolk, England
UAP · Triangle · 69 sources
52Partially documented
The Beast of Gévaudan
June 30, 1764 · Les Hubacs, near Langogne, parish of Saint-Étienne-de-Lugdarès (Vivarais, now Ardèche), on the border of the Gévaudan
Cryptid · Creature · 80 sources
50Partially documented
The Kyshtym dwarf (Alyoshenka)
May 1996 · Kaolinovy, Kyshtym, Chelyabinsk Oblast
UAP · Being / humanoid · 41 sources · 2 photos
49Partially documented
Shipton and Ward Yeti Footprints, Menlung Glacier, 1951
November 8, 1951 · Menlung Glacier, below the Menlung La, Gauri Sankar group, Nepal-Tibet border
Cryptid · Creature · 49 sources · 5 photos
49Partially documented
Shag Harbour UFO Incident
October 4, 1967 · Shag Harbour, Shelburne County, Nova Scotia
UAP · Other · 58 sources
49Partially documented
The British Phantom Airship ("Scareship") Wave of 1909
March 23, 1909 · England, Wales and Ireland (Peterborough, East Anglia, Birmingham, Cardiff and Caerphilly, Belfast, Kingstown)
UAP · Cigar · 36 sources
48Partially documented
Trans-en-Provence Case
January 8, 1981 · Trans-en-Provence, Var, Provence
UAP · Disc / saucer · 52 sources · 2 photos
48Partially documented
The Sasovo Explosion and Glowing Spheres
April 12, 1991 · Sasovo, Ryazan Oblast
UAP · Sphere · 29 sources
45Partially documented
The Zanfretta UFO Incident, Torriglia 1978
December 6, 1978 · Villa Casa Nostra, Marzano, Torriglia, Genoa, Liguria
UAP · Being / humanoid · 22 sources · 1 photos
45Partially documented
The French UFO Wave of 1954 (la vague de 1954)
September 1954 · France, nationwide (Quarouble, Prémanon, Marcilly-sur-Vienne, Biot, Ambleteuse, Bélesta and hundreds of other communes)
UAP · Disc / saucer · 27 sources · 1 photos
45Partially documented
Val Johnson Incident
August 27, 1979 · State Highway 220 near County Road 5, west of Stephen, Marshall County, Minnesota
UAP · Orb / light · 49 sources · 12 photos
45Partially documented
The Duhamel Landing Rings: Schielke Farm, Alberta, 1967
August 5, 1967 · Schielke farm, near Duhamel, Camrose County, Alberta
UAP · Unknown · 16 sources · 2 photos
44Partially documented
The Huella del Pajarillo Burn Mark, Capilla del Monte
c. 1986 · Cerro Pajarillo, near Capilla del Monte, Ischilín Department, Córdoba
UAP · Disc / saucer · 25 sources · 3 photos
44Partially documented
The Jersey Devil's Phenomenal Week
January 16, 1909 · South Jersey and the Philadelphia area (Woodbury, Bristol, Burlington, Gloucester City, Camden, Trenton)
Cryptid · Creature · 50 sources
44Partially documented
The Falcon Lake Incident
May 20, 1967 · Rock outcrop north of Falcon Lake, Whiteshell Provincial Park, Manitoba
UAP · Disc / saucer · 57 sources
44Partially documented
The Patterson-Gimlin Bigfoot Film
October 20, 1967 · Bluff Creek, Six Rivers National Forest, California
Cryptid · Creature · 51 sources · 2 photos
44Partially documented
Westall School UFO Sighting
April 6, 1966 · Westall High School and The Grange, Clayton South, Melbourne, Victoria
UAP · Disc / saucer · 53 sources
44Partially documented
The Warren Smith Photographs: Highwood Ranger Station, Alberta, 1967
July 3, 1967 · Near Highwood Ranger Station, about 50 miles southwest of Calgary, Alberta (also catalogued as near Nanton)
UAP · Disc / saucer · 11 sources · 8 photos
43Partially documented
The Tully Saucer Nest: George Pedley at Horseshoe Lagoon
January 19, 1966 · Horseshoe Lagoon, Albert Pennisi's cane farm, Euramo, near Tully, Queensland
UAP · Disc / saucer · 29 sources · 5 photos
43Partially documented
Voronezh UFO Incident
September 27, 1989 · Yuzhny Park (Kozly park), Mashmet area, left bank, Voronezh
UAP · Sphere · 60 sources
43Partially documented
The Flatwoods Monster
September 12, 1952 · G. Bailey Fisher farm, Flatwoods, Braxton County, West Virginia
Cryptid · Creature · 51 sources
43Partially documented
Betty and Barney Hill Abduction
September 19, 1961 · US Route 3 near Indian Head, Lincoln, New Hampshire
Alien · Being / humanoid · 61 sources
43Partially documented
Valensole Encounter (Maurice Masse)
July 1, 1965 · L'Olivol lavender field, near Valensole, Alpes-de-Haute-Provence (then Basses-Alpes)
UAP · Egg · 51 sources
42Partially documented
The Lonnie Zamora Incident, Socorro
April 24, 1964 · Arroyo on the southern outskirts of Socorro, near the town dynamite shack, Socorro County, New Mexico
UAP · Egg · 55 sources
42Partially documented
The Silpho Moor Flying Saucer, Scarborough 1957
c. 1957 · Silpho Moor, near Reasty Bank and Broxa Forest, north-west of Scarborough, North Yorkshire, England
UAP · Disc / saucer · 22 sources · 1 photos
40Partially documented
The Ngātea Mystery Circle
September 4, 1969 · O'Neill farm, near Ngātea, Hauraki Plains, Waikato
UAP · Unknown · 20 sources · 6 photos
39Partially documented
San José de Valderas landing and photographs (Ummo affair)
June 1, 1967 · Castillos de San José de Valderas (now Parque de los Castillos), Alcorcón, Madrid
UAP · Disc / saucer · 44 sources · 1 photos
39Partially documented
The Day UFOs Stopped Play: Florence Stadium Mass Sighting
October 27, 1954 · Stadio Comunale (now Stadio Artemio Franchi), Campo di Marte, Florence, Tuscany
UAP · Egg · 49 sources
39Partially documented
George Adamski's Desert Center Contact
November 20, 1952 · Colorado Desert, about 10 miles from Desert Center on the road toward Parker, Arizona, Riverside County, California
Alien · Being / humanoid · 46 sources
39Partially documented
The Tunguska Explosion and the Exploding Spaceship Hypothesis
June 30, 1908 · Near the Podkamennaya Tunguska River, Krasnoyarsk Krai, Siberia
UAP · Other · 57 sources
38Partially documented
The Gdynia Harbour "UFO Crash": Poland's Roswell
January 21, 1959 · Basin IV, Polish Quay (Nabrzeże Polskie), Port of Gdynia
UAP · Cigar · 41 sources
38Partially documented
Council Bluffs Molten Metal Landing at Big Lake Park
December 17, 1977 · Big Lake Park (levee by Gilbert's Pond), Council Bluffs, Pottawattamie County, Iowa
UAP · Sphere · 33 sources
38Partially documented