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The Seaford Poltergeist ("Popper"), Herrmann House, Long Island, 1958
February 3, 1958 · Herrmann house, Seaford, Town of Hempstead, Nassau County, Long Island, New York
United States
Paranormal · Other · 50 sources · 2 photos
57Partially documented
Tamaroa Hovering UFO and Power Failure
November 14, 1957 · Tamaroa, Perry County, Illinois
United States
UAP · Unknown · 15 sources
12Thinly documented
The Hammond and Whiting Police Chase of a Beeping Sky Object
November 10, 1957 · Hammond and Whiting, Lake County, Indiana
United States
UAP · Unknown · 11 sources
18Thinly documented
Dante Landed-Craft Sighting (Everett Clark), Knox County, Tennessee
November 6, 1957 · Gilbert Sterchi's pasture, Dante School Road, Dante, Knox County, Tennessee
United States
UAP · Egg · 14 sources · 3 photos
22Thinly documented
The Rene Gilham Light Beam Burn Case, Merom, Indiana
November 6, 1957 · Outskirts of Merom, Sullivan County, Indiana
United States
UAP · Disc / saucer · 15 sources
23Thinly documented
The Danville State Trooper Chase and Radio Failure (1957)
November 6, 1957 · Danville, Vermilion County, Illinois (north on Route 1, then west to Oakwood and south on Sugar Creek Road toward Fairmount)
United States
UAP · Orb / light · 12 sources
25Thinly documented
USCGC Sebago radar-visual sighting, Gulf of Mexico
November 5, 1957 · Gulf of Mexico, about 200 miles south of the Mississippi delta
International waters
UAP · Unknown · 11 sources
41Partially documented
White Sands Proving Ground Army patrol sightings near Trinity Site (1957)
November 3, 1957 · Trinity Site bunkers, northern range of White Sands Proving Ground, near Stallion Site, New Mexico
United States
UAP · Egg · 16 sources
29Thinly 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
United Kingdom
UAP · Disc / saucer · 22 sources · 1 photos
40Partially documented
Cynthia Appleton and the Gharnasvarn Visitors (the "Space Baby" Case)
November 1957 · Fentham Road, Aston, Birmingham, England
United Kingdom
UAP · Being / humanoid · 20 sources
21Thinly documented
The Antônio Villas Boas Abduction
October 15, 1957 · Villas Boas family farm near São Francisco de Sales, Minas Gerais
Brazil
UAP · Egg · 64 sources
25Thinly documented
The Nawaca Fishermen Encounter (Nabouwalu, Fiji)
October 8, 1957 · Coastal waters between Nabouwalu and Nawaca, Bua Province, Vanua Levu
Fiji
UAP · Disc / saucer · 11 sources
19Thinly documented
The Kersey time-slip: three naval cadets walk into a silent medieval village (1957)
October 1957 · Kersey, Babergh district, Suffolk
United Kingdom
Paranormal · Other · 32 sources
18Thinly documented
Caso Lemos Ferreira: Portuguese Air Force F-84G formation encounter
September 4, 1957 · Night route between Ota and Spain, reported over Cáceres, Córdoba, Portalegre and Coruche
Portugal
UAP · Sphere · 17 sources
24Thinly documented
Fort Belvoir Black Ring Photographs (Condon Case 50)
September 1957 · Fort Belvoir U.S. Army facility, Virginia
United States
UAP · Other · 24 sources · 6 photos
45Partially documented
A. G. Pronin's Snowman on the Fedchenko Glacier, Pamirs (1957)
August 1957 · Balyandkiik River valley, Fedchenko Glacier, Pamir Mountains, Gorno-Badakhshan
Tajikistan
Cryptid · Creature · 24 sources
28Thinly documented
RB-47 Radar and ELINT UFO Encounter
July 17, 1957 · Gulf Coast to Oklahoma City (Mississippi, Louisiana, Texas, Oklahoma); first visual near Winnsboro, Louisiana
United States
UAP · Unknown · 26 sources
57Partially documented
The Milton Torres Intercept Order: RAF Manston, 1957
May 20, 1957 · RAF Manston, Isle of Thanet, Kent, and the skies over East Anglia
United Kingdom
UAP · Unknown · 37 sources
41Partially documented
Four Little Men in Grey at Beaucourt-sur-l'Ancre
May 10, 1957 · Beaucourt-sur-l'Ancre, near Albert, Somme
France
UAP · Being / humanoid · 12 sources
29Thinly documented
Gordon Cooper's Edwards AFB Saucer Landing and His UFO Letter to the United Nations
May 2, 1957 · Askania Site #4, Edwards Air Force Base, Kern County, California
United States
UAP · Disc / saucer · 33 sources
38Partially documented
  • Department of Transportation. Federal Aviation Administration.· 2023· 1 pages· 1 page mentions it
    • p. 1 …A/C #21 - EJA810 Time: 2350z Altitude: FL400 flying west reported a balloon @ approx. FL470 traveling southbound.
  • U.S. Department of War· 144 pages· 108 pages mention it
    • p. 55 …Slip at times appeared single and at times gave appearance of 2 aircraft in vicinity 25. Summary of Incident: (over…
    • p. 58 …At that time Kunsman thought they were seagulls. Thought there were from 10 to 20. At no time did Kunsman…
  • FBI via The Black Vault· 2018-11· 56 pages· 7 pages mention it
    • p. 29 …Date/Time: Accepted By: Printed Name: Reason: Date/Time: Accepted By: Printed Name: Reason: Date/Time: Accepted By: Printed Name…
    • p. 33 …Date/Time: Accepted By: Printed Name: Reason: Date/Time: Accepted By: Printed Name: Reason: Date/Time: Accepted By: Printed Name…
  • U.S. Department of War· 209 pages· 141 pages mention it
    • p. 54 …Time 1200 noon first time later at 11:15 approximately 3. Location Portland, Oregon 4. Name of observer Richard Rankin…
    • p. 55 …At this time the objects reappeared going from North to South, although this time there were only seven of the…
  • Department of the Navy FOIA· 2023-01· 90 pages· 72 pages mention it
    • p. 44 …out of (b) (1) for (b) (1) Time: (b) (1) Altitude at approx. (b) (1) heading (b) (1) degress, (b…
    • p. 72 …Date (mm/dd/yy) Time of detection (hh:mm:ss Z) Day/Night Side No. Buno Mission Description (CAS, BFM…
  • U.S. Department of War· 253 pages· 165 pages mention it
    • p. 68 …Number of objects 10 first time 7 second time 9. Distance of object from observer Not stated 10. Time in…
    • p. 69 …At this time the objects reappeared going from North to South, although this time there were only seven of the…

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