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Ellsworth AFB Radar-Visual Case and F-84 Pursuit, South Dakota, 1953
August 5, 1953 · Black Hawk Ground Observer Corps post and Ellsworth Air Force Base, near Rapid City, South Dakota
United States
UAP · Other · 24 sources
60Well documented
B-29 radar-visual encounter over the Gulf of Mexico (Karas, Naumann / "Harter and Coleman")
December 6, 1952 · Gulf of Mexico, about 100 miles south of the Louisiana coast, about 190 miles from Galveston, Texas
United States
UAP · Other · 23 sources
47Partially 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
United States
UAP · Being / humanoid · 46 sources
39Partially documented
The RAF Topcliffe "Perfect Flying Saucer" During Exercise Mainbrace
September 19, 1952 · RAF Topcliffe, near Thirsk, North Yorkshire (approach to RAF Dishforth)
United Kingdom
UAP · Disc / saucer · 20 sources
33Partially documented
Pro early
Davis-Monthan AFB: Two Discs Pace a B-36 (The Case of the Missing Report)
May 1, 1952 · Davis-Monthan AFB, Tucson, Pima County, Arizona
United States
UAP · Disc / saucer · 19 sources
32Partially documented
Wonsan-Sunchon B-29 "Orange Globe" Sightings
January 29, 1952 · Wonsan and Sunchon, North Korea
North Korea
UAP · Sphere · 23 sources
29Thinly documented
Flying Saucers over the Belgian Congo Uranium Mines (Elisabethville, 1952)
c. 1952 · Elisabethville district (now Lubumbashi), over the uranium mines of southern Katanga, Belgian Congo
Democratic Republic of the Congo
UAP · Disc / saucer · 24 sources
30Partially documented
Pro early
Capital Airlines Flight 610 and the lighted object near Andrews AFB (Blue Book Case 1011)
November 18, 1951 · Near Andrews Air Force Base, Prince George's County, Maryland
United States
UAP · Unknown · 11 sources
27Thinly documented
The Sioux City Mystery Plane
January 20, 1951 · Sioux City municipal airport (now Sioux Gateway Airport), Sioux City, Iowa
United States
UAP · Other · 18 sources
38Partially documented
Capt. Willis T. Sperry and the American Airlines DC-6 sighting near Mount Vernon, Virginia
May 29, 1950 · About seven miles west of Mount Vernon, Fairfax County, Virginia, after departure from Washington National Airport
United States
UAP · Cigar · 13 sources
23Thinly documented
Pro early
TWA Flight 117 "red wheel" sighting, Goshen, Indiana
April 27, 1950 · Over Goshen toward South Bend, Indiana
United States
UAP · Disc / saucer · 10 sources
27Thinly documented
Pro early
Kodiak Naval Radar-Visual Encounters: P2V-3 Patrol Plane and USS Tillamook
January 22, 1950 · Naval Air Station Kodiak, Kodiak, Alaska
United States
UAP · Other · 18 sources
51Partially documented
The Gorman Dogfight
October 1, 1948 · Hector Airport, Fargo, North Dakota
United States
UAP · Orb / light · 58 sources
47Partially documented
The Chiles-Whitted Encounter
July 24, 1948 · 20 miles southwest of Montgomery, Alabama (near Hayneville, Lowndes County)
United States
UAP · Cigar · 66 sources
41Partially documented
Pro early
The St. Louis and Alton Giant Bird Flap (Thunderbird Sightings), 1948
April 1948 · Alton, Illinois, and greater St. Louis, Missouri, with a separate cluster around Caledonia and Freeport, northern Illinois
United States
Cryptid · Creature · 14 sources
28Thinly documented
The Mantell UFO Incident
January 7, 1948 · Godman Field, Fort Knox, to the Phillips farm near Franklin, Simpson County, Kentucky
United States
UAP · Other · 100 sources · 1 photos
50Partially documented
The Ghost Rockets (Spökraketer), Scandinavia, 1946
July 19, 1946 · Lake Kölmjärv, Överkalix, Norrbotten, Sweden (wave across Sweden, Finland, Norway and Denmark)
Sweden
UAP · Cigar · 54 sources · 3 photos
86Well documented
Foo Fighters of World War II
November 1944 · Rhine valley north of Strasbourg, Alsace, with reports across the European and Pacific theatres
France
UAP · Orb / light · 76 sources
50Partially documented
The Bass Strait Beaufort pacing incident (T.R.H. "Ricky" Royal)
February 1944 · Bass Strait, between Victoria and Tasmania
Australia
UAP · Unknown · 12 sources
16Thinly documented
Churchill's Alleged UFO Cover-Up: The RAF Reconnaissance Plane Encounter
c. 1944 · Near or over the English coastline (reportedly the east coast of England)
United Kingdom
UAP · Unknown · 29 sources
23Thinly documented