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Category Shape / form From year To year Country Time of day Witnesses Evidence Status Duration Sound Colour Motion Lights Sources include Min photos Min videos Min sources Min score Sort order

3D model Narrated

“Project Grudge”

Stories11

The Kaliszewski Balloon-Crew Sightings

October 10, 1951 · About 10 miles east of St. Croix Falls, Wisconsin, and north of Minneapolis, Minnesota

UAP · Cigar · 24 sources

37Partially documented

Fort Monmouth radar and T-33 sightings

September 10, 1951 · Fort Monmouth, Point Pleasant and Sandy Hook, New Jersey

UAP · Disc / saucer · 20 sources

49Partially documented

The Lubbock Lights

August 25, 1951 · Lubbock, Texas

UAP · Formation · 38 sources · 4 photos

50Partially documented

The New Delhi Flying Club Cigar

March 15, 1951 · Delhi Flying Club hangar, Safdarjung Aerodrome, New Delhi

UAP · Cigar · 17 sources

32Partially documented

The Mariana UFO Film

August 15, 1950 · Legion Park, Great Falls, Montana

UAP · Disc / saucer · 63 sources · 3 photos

55Partially documented

Radar-Visual Sighting Over Dayton and Wright-Patterson AFB (ATIC)

March 8, 1950 · Dayton Municipal Airport, Vandalia, and Wright-Patterson AFB, Ohio

UAP · Sphere · 12 sources

50Partially documented

The Norwood Searchlight Disc Sightings

August 19, 1949 · Saints Peter and Paul Catholic Church, Norwood, Ohio (also Madeira and Milford, Ohio)

UAP · Disc / saucer · 22 sources · 12 photos

45Partially documented

Rogue River Disc Sighting, Gold Beach, Oregon

May 24, 1949 · Rogue River near Elephant Rock, about 2 to 2.5 miles upstream of the mouth, Gold Beach, Curry County, Oregon

UAP · Disc / saucer · 25 sources

36Partially documented

Two flat silvery discs over Tucson seen by M/Sgt. Troy Putnam (Blue Book Incident 337)

May 9, 1949 · Tucson, Pima County, Arizona

UAP · Disc / saucer · 11 sources

29Thinly documented

The Jackson "Megaphone" Object: Pilot Thomas A. Rush and Blue Book Incident 233 (1949)

January 1, 1949 · In the air east of Jackson, Hinds County, Mississippi, on approach to North Jackson Airpark

UAP · Cigar · 15 sources

30Partially documented

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

Cryptid · Creature · 14 sources

28Thinly documented

Names5

Project Blue Book Programme · 230 stories
The US Air Force's long-running inquiry into unidentified flying objects grew out of Project Sign and Grudge.
Project Sign Programme · 16 stories
Project Sign was the Air Force programme that gathered flying saucer reports in 1948.
Project Grudge Programme · 11 stories
In the early years, the US Air Force ran its UFO investigations through Project Grudge.
Edward J. Ruppelt Person · 45 stories
Edward J.
Air Technical Intelligence Center Organisation · 6 stories
The Air Technical Intelligence Center, ATIC, sat at Wright-Patterson Air Force Base outside Dayton, Ohio.

Documents63 · see all

aaro historical record report volume 1 2024 Report

The Black Vault· 64 pages· 8 pages mention it
- p. 16 15 Project GRUDGE (Original Organization) (February–December 1949) Background: Project SIGN was renamed Project GRUDGE in approximately February 1949. The…
- p. 17 …The new Project GRUDGE reviewed all of the previous cases in Project SIGN, old Project GRUDGE, and from the ATIC…
Historical Record Report Volume 1 March 8 2024 Report

Office of the Secretary of Defense· 63 pages· 8 pages mention it
- p. 15 15 Project GRUDGE (Original Organization) (February–December 1949) Background: Project SIGN was renamed Project GRUDGE in approximately February 1949. The…
- p. 16 …The new Project GRUDGE reviewed all of the previous cases in Project SIGN, old Project GRUDGE, and from the ATIC…
AARO Historical Record Report Volume 1 Report

All-domain Anomaly Resolution Office· 2024-03· 63 pages· 8 pages mention it
- p. 15 15 Project GRUDGE (Original Organization) (February–December 1949) Background: Project SIGN was renamed Project GRUDGE in approximately February 1949. The…
- p. 16 …The new Project GRUDGE reviewed all of the previous cases in Project SIGN, old Project GRUDGE, and from the ATIC…
Report on the Historical Record of U.S. Government Involvement with Unidentified Anomalous Phenomena, Volume I Report

All-domain Anomaly Resolution Office· 2024-03-08· 63 pages· 8 pages mention it
- p. 15 15 Project GRUDGE (Original Organization) (February–December 1949) Background: Project SIGN was renamed Project GRUDGE in approximately February 1949. The…
- p. 16 …The new Project GRUDGE reviewed all of the previous cases in Project SIGN, old Project GRUDGE, and from the ATIC…
Office of the Secretary of Defense: 05_AARO_Historical_Record_Report Official release

Department of Defense. Office of the Secretary of Defense.· 2023· 63 pages· 8 pages mention it
- p. 15 15 Project GRUDGE (Original Organization) (February–December 1949) Background: Project SIGN was renamed Project GRUDGE in approximately February 1949. The…
- p. 16 …The new Project GRUDGE reviewed all of the previous cases in Project SIGN, old Project GRUDGE, and from the ATIC…
usaf f2 FOIA release

Office of the Secretary of Defense· 1 pages· 1 page mentions it
- p. 1 …was changed to Project Grudge, and in 1953 it became known as Project Blue Book. On Dec. 17, 1969, the…

All 63 documents →