10 January 1951 10:10 - St Croix Falls E10M, Wisconsin, USA -   Gen Mills plane at 6000 feet alt, tracking balloon at 20,000'. glowing UFO approached fast in shallow dive, leveled off, slowed down, sharp turn, fast departure. Explanation: Aircraft.

1 February 1951 - Taiping, Malaysia -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one witness.

14 February 1951 - Alamogordo, New Mexico, USA -   USAF pilots see flat, round, white object hovering.

In mid-February 1951 16:15 - Lasqueti Island, British Columbia, Canada -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by two witnesses for six seconds (Roussel).

19 February 1951 - Rodeo, New Mexico, USA -   Pilot saw a green flare [fireball?] pass his plane.

19 February 1951 07:20 - Mount Kilimanjaro, Tanzania -   EAA incident. Explanation: Flare.

21 February 1951 04:55 - Durban, South Africa -   Dark red, torpedo-shaped object with darker center

26 February 1951 07:10 - Ladd AFB, Alaska, USA -   Dull grey, metallic object about 120 feet long 10-12 feet thick

In March 1951 Daytime - Elkins, West Virginia, USA -   Unusual objects were sighted, that had unconventional appearance and performance. Less than 12 objects were observed by four witnesses for a few seconds (Haggerty).

5 March 1951 Night - Palomar Gardens, California , USA -   Photo of cigar-shaped object releasing 6 saucer/bell shaped objects. Explanation: Hoax.

6 March 1951 14:34 - Albuquerque, New Mexico, USA -   A meteor-like object was observed. One object was observed by a male witness briefly (Lapaz; Petrol). Explanation: Meteor.

10 March 1951 09:51 - Chinnampo, South Korea -   USAF B-29 incident. Large red-yellow glow burst and becomes blue-white.

11 March 1951 12:00 - Biggs AFB, Texas, USA -   An object, later identified as the planet Venus, was observed. One object was observed by military witnesses at an airfield. Explanation: Venus.

13 March 1951 15:20 - McClellan AFB, California , USA -   Cylinder with twin tails, 200 feet long and 90 feet wide, turn at incredible speed.

14 March 1951 15:00 - Holloman Afb E, New Mexico, USA -   Twinkle incident. Explanation: Balloon.

15 March 1951 10:20 - New Delhi, India -   Metallic cigar-shaped object

26 March 1951 16:45 - Terre Haute, Indiana, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One silver disc was observed by four witnesses in a city for 24 seconds (Marcotte).

In April 1951 Afternoon - Beacon Hill, Saskatchewan, Canada -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by five witnesses for two minutes (Fish).

11 April 1951 - Minneapolis, Minnesota, USA -   Two men in plane sight glowing objects, on ground General Mills men sight them through theodolite.

17 April 1951 14:00 - Georgetown, South Carolina, USA -   A daytime disc was reported (Harrelson).

12 May 1951 16:00 - Neuchatel, Switzerland -   An unusual object was sighted, that had unconventional appearance and performance. One disc was observed by eight witnesses for over 15 minutes (Lombard).

22 May 1951 13:30 - Great Falls, Montana, USA -   Balloon-like object observed. One ball was observed for 30 minutes (Buzzelle). Explanation: Balloon.

22 May 1951 Afternoon - International Falls, Minnesota, USA -   Hovered.

24 May 1951 Morning - Gary, Indiana, USA -   Balloon-like objects observed. A group of balls was observed by a male witness. Explanation: Balloon.

24 May 1951 Morning - Crown Point, Indiana, USA -   Balloon-like objects observed. 13 balls were observed by several witnesses (Schroeter). Explanation: Balloon.

24 May 1951 Around 1000 - Chicago, Illinois, USA -   Balloon-like objects observed. Several balls were observed by a male witness in a warplane for several hours (Dworak). Explanation: Aircraft.

29 May 1951 09:18 - Spokane, Washington, USA -   Saucer shaped object at 2800 feet altitude. Explanation: Balloon.

29 May 1951 15:48 - Downey, California , USA -   "Large number" of glowing objects. Explanation: Natural.

In June 1951 10:00 - North West Cape, Western Australia, Australia -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by two witnesses for 18 seconds (Maddigan).

In June 1951 15:00 - Council Bluffs, Iowa, USA -   Unidentified objects were sighted, but with appearance and behavior that most likely would have a conventional explanation. Seven objects were observed by one witness for over one minute (Walker).

1 June 1951 15:15 - Scott AFB, Illinois, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by several military witnesses at an airfield for 18 seconds (Dumas).

In Mid- 1951 - Coggon, Iowa, USA -   A daytime disc was reported.

In July 1951 06:00 - Maura Lake, Ontario, Canada -   Hovered.

In Mid- 1951 10:00 - Mexico City Apt, Mexico -   Motion pictures

In Mid- 1951 Daytime - Gonzales, Texas, USA -   Balloon-like object observed. One ball was observed for a few minutes (Shuler). Explanation: Balloon.

In Mid- 1951 13:30 - Allerton, Massachusetts, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by two witnesses for five minutes (Kierzkowski).

In Mid- 1951 14:30 - Ann Arbor, Michigan, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one witness for a few seconds (Milham).

6 July 1951 08:30 - Lynchburg, Virginia , USA -   Zigzag maneuvers. 1m diameter disc hovered over college building. Zig-zagged, rolled onto edge, to the west. No sound, no trail.

9 July 1951 13:40 - Dearing, Georgia, USA -   Pilot saw high speed white oval disc about twice size of his plane

19 July 1951 - Maldonado, Uruguay -   Cigar Photo

22 July 1951 Around 1900 - Tujunga, California , USA -   Unidentified objects were sighted, that had an unusual appearance or performance. Four objects were observed by one witness (Bartko).

24 July 1951 19:10 - Portsmouth, New Hampshire, USA -   Grayish 100-200 feet tubular object

26 July 1951 Daytime - Middletown, Ohio, USA -   An unidentified but otherwise conventional object was sighted. One object was observed by one witness (Barr).

In August 1951 15:00 - Fort Monmouth, New Jersey, USA -   Balloon-like object observed. One ball was observed by 100 witnesses at a military facility for several hours (Mingus). Explanation: Balloon.

In August 1951 16:00 - Navasota, Texas, USA -   One object was observed by one witness briefly (Morley).

In August 1951 After 1600 - Seewalchen, Austria -   Hovered.

1 August 1951 Morning - Pittsburgh Ne, Pennsylvania, USA -   Balloon-like object observed. One ball was observed by a male witness for several hours. Explanation: Balloon.

1 August 1951 09:00 - Youngstown, Ohio, USA -   Balloon-like object observed. One ball was observed by a male witness for several hours (Branden). Explanation: Balloon.

1 August 1951 09:00 - Cleveland, Ohio, USA -   Balloon-like object observed. One ball was observed by a male witness for several hours (Walker). Explanation: Balloon.

1 August 1951 10:45 - Wright Afb, Ohio, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed at an airfield.

1 August 1951 Afternoon - Bedford, Pennsylvania, USA -   Balloon-like object observed. One ball was observed by several witnesses. Explanation: Balloon.

1 August 1951 19:30 - Mercersburg, Pennsylvania, USA -   Balloon-like object observed. One ball was observed by one witness for 90 minutes (Thompson; Zitsman). Explanation: Balloon.

5 August 1951 Around 1400 - Baltimore, Maryland, USA -   Flying discs were observed. Four discs, about 40 feet across, were observed by one experienced male witness briefly (Bartlett).

8 August 1951 14:00 - Cleveland, Ohio, USA -   Dark cigar (6-7m long) flying at great speed. Explanation: Aircraft.

11 August 1951 12:00 - Portland, Oregon, USA -   Three objects flew in perfect V formation.

15 August 1951 10:45 - Central, New Mexico, USA -   Engineer incident.

20 August 1951 11:10 - Spokane, Washington, USA -   Balloon-like object observed. One ball was observed for 20 minutes. Explanation: Balloon.

23 August 1951 17:00 - Coaldale, Colorado , USA -   An unidentified object was sighted, that had an unusual appearance or performance. One object was observed by two witnesses for over one minute (Pinkney).

In late August 1951 Daytime - Malone, New York, USA -   Farmer incident.

25 August 1951 21:10 - Lubbock, Texas, USA -   Lubbock Lights / Hart Photos. Famed sightings and photographs of formations of lights over Lubbock, Texas. Official explanation: birds or moths.

29 August 1951 15:30 - Grenier AFB, New Hampshire, USA -   Two silvery objects connected by a dark body, slowly descend, rise again. Explanation: Balloon.

In September 1951 - Verdun, Quebec, Canada -   A daytime disc was reported (Haslett).

In September 1951 15:00 - Eddington, Maine, USA -   An unidentified object was sighted, that had an unusual appearance or performance. One object was observed by one witness for a few seconds (Hooper).

In September 1951 Before 1800 - Lake Charles, Louisiana, USA -   Flying discs were observed. Three discs were observed by one male witness (Miller).

3 September 1951 14:00 - Spokane, Washington, USA -   Disc shaped, from northwest . Explanation: Meteor.

6 September 1951 19:20 - Claremont, California, USA -   Six orange lights in an irregular formation, fly straight and level. Explanation: Psych.

7 September 1951 10:00 - Grayling, Michigan, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by several witnesses briefly.

8 September 1951 14:00 - Spokane, Washington, USA -   Balloon-like object observed. One ball was observed by one witness for several minutes (Ponsness). Explanation: Meteor.

In mid-September 1951 16:00 - Springfield, Illinois, USA -   Unidentified objects were sighted, but with appearance and behavior that most likely would have a conventional explanation. Three objects were observed by 20 witnesses for ten minutes (Moroz).

16 September 1951 12:17 - Marion Ne3M, Ohio, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one witness for a few minutes (Grover). Explanation: Aircraft.

17 September 1951 - Marion, Ohio, USA -   Black swept-wing object at 2,800 feet in near collision with aircraft

In Fall 1951 - Lake Nipissing, Ontario, Canada -   A daytime disc was reported.

In October 1951 Daytime - Centerville, Iowa, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one witness.

In Fall 1951 Daytime - Moriarty, New Mexico, USA -   Unidentified objects were sighted, but with appearance and behavior that most likely would have a conventional explanation. Two objects were observed by one witness for over one minute (Milbourn).

30 September 1951 15:00 - Orange Sw3M, Virginia , USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One disc was observed by three witnesses in a residential area for two minutes (Daniel).

9 October 1951 13:42 - Terre Haute, Indiana, USA -   CAA employee saw high-speed "flattened tennis ball"; and pilot, "flattened sphere"; headed toward Newport atomic plant

9 October 1951 14:00 - Lodi, Ohio, USA -   An unidentified object was sighted, that had an unusual appearance or performance. One object was observed by one witness for 12 seconds (George).

9 October 1951 18:30 - Indianapolis E, Indiana, USA -   An unidentified object was sighted, that had an unusual appearance or performance. One object was observed by one witness for several minutes (Ackelmire).

10 October 1951 - Wisconsin, USA -   An unusual object was sighted, that had unconventional appearance and performance. One object was observed by two witnesses (Kaliszewski).

10 October 1951 - St. Croix Falls, Wisconsin, USA -   Cigar shaped object cross the sky, dive slightly, level off

16 October 1951 11:01 - Whidbey Island, Washington, USA -   USAF incident. Round medium-grey object at high speed and high altitude, no sound. Explanation: Planet.

16 October 1951 Daytime - Hastings, Minnesota, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one witness (Cremer).

22 October 1951 11:15 - Waterbury, Connecticut, USA -   An unidentified object was sighted, that had an unusual appearance or performance. One object was observed by one witness for 12 seconds (Mascoli).

26 October 1951 Daytime - San Bernardino, California , USA -   An object, later identified as the planet Venus, was observed. One object was observed by several witnesses. Explanation: Venus.

30 October 1951 - Yucca Flats, Nevada, USA -   Squadrons of UFOs over atomic test site

30 October 1951 06:40 - Yucca Flat, Nevada, USA -   Three silver ovoids 600m over Atomic Bomb test site, 20 minutes before blast. More objects join.

In November 1951 Afternoon - Alto.Lapa, Brazil -   A daytime disc was reported.

In November 1951 17:00 - Concord, Massachusetts, USA -   An unidentified but otherwise conventional object was sighted. One object was observed by several witnesses (Craik). Explanation: Planet.

2 November 1951 23:00 - Mojave, California, USA -   10-m diameter disk-shaped flying object, blue green. Explanation: Psych.

4 November 1951 - Phoenix, Arizona , USA -   A daytime disc was reported (Brenner).

9 November 1951 Daytime - Titusville, Pennsylvania, USA -   Unidentified objects were sighted, that had an unusual appearance or performance. Two objects were observed by two witnesses briefly (Gibson).

9 November 1951 Afternoon - Port Jervis, New York, USA -   An aircraft-like object was observed. One aircraft-like object was observed by a male witness for a few seconds (Arthur). Explanation: Aircraft.

9 November 1951 Afternoon - Middletown, New York, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by a male witness for over three minutes. Explanation: Aircraft.

10 November 1951 Daytime - Bloomsburg, Pennsylvania, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one witness for 42 seconds (Cleaver).

11 November 1951 10:30 - South Wales, New York, USA -   Aircraft-like objects were observed. An aircraft-like objects was observed by one witness for a few seconds (Keilick). Explanation: Aircraft.

11 November 1951 Around 1400 - Santa Rosa Mtn, California , USA -   Photo. Explanation: Hoax.

21 November 1951 Daytime - Desert, Nevada, USA -   Two objects were observed by two witnesses.

21 November 1951 Daytime - Riverside, California , USA -   Photo. Explanation: Hoax.

23 November 1951 - Riverside, California , USA -   Photo, evaluated by USAF as a hoax. Explanation: Hoax.

24 November 1951 - Coopersville, Michigan, USA -   Capital Airlines Flight 94 pilot and ground observers saw a large round object flying silently at low altitude and supersonic speed.

24 November 1951 15:53 - Mankato, Minnesota, USA -   White eight feet flying-wing-shaped object hovering

In 1952 - Montague, California , USA -   A daytime disc was reported.

In 1952 Around 1000 - F-86, USA -   USAF incident.

In Winter 1951 Around 1100 - Kaiapoi, New Zealand -   Photo. Explanation: Cloud.

In 1952 Daytime - Cyoma, Hungary -   A daytime disc was reported.

In December 1951 Daytime - Sacramento, California , USA -   An unusual object was sighted, that had unconventional appearance and performance. One object was observed by one witness for over one minute (Brookey).

In 1952 Daytime - York, Pennsylvania, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object, larger than a star, was observed by one male witness (Rhoads).

In 1952 Afternoon - Suez Canal, Egypt -   One object was observed by three witnesses.

In 1952 Afternoon - Spokane, Washington, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by two witnesses, a married couple, at a mountain.

In 1952 16:00 - Glasgow, Elder Park Primary, UK -   Sombrero-shaped disc, titled slightly to one side, seemed to be rotating, 100 feet altitude. Student, teacher, janitor as witnesses. "Time seemed to stand still."

In 1952 16:30 - Peru, Peru -   Photo of rocket or shell-like object trailing smoke. Second disc-like object appears to have been caught in lower right-hand corner of photo.

7 December 1951 08:15 - Oak Ridge, Tennessee, USA -   20 foot square observed by security guard; F-47's scrambled

7 December 1951 10:21 - Torrance, California , USA -   Aeronca 65Cv Pilot incident.

7 December 1951 14:12 - Kansas City, Missouri, USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by one male witness for over one minute (Gibson).

7 December 1951 16:30 - Sunbury, Ohio, USA -   Silvery sphere through telescope; two specks sighted at sides

8 December 1951 15:46 - San Francisco, California , USA -   An unidentified object was sighted, but with appearance and behavior that most likely would have a conventional explanation. One object was observed by two witnesses for two minutes (Jungkurth).

11 December 1951 15:15 - Pudahuel, Chile -   A daytime disc was reported.

12 December 1951 13:50 - Hastings, Minnesota, USA -   Three feet white (or gray) object at one o'clock level position. Explanation: Balloon.

20 December 1951 15:30 - Pacific -   One object was observed by three witnesses at a US Air Force Base (Scott).

22 December 1951 10:30 - Columbus, Ohio, USA -   USAF F-84 incident. Explanation: Balloon.

22 December 1951 10:30 - Columbus, Ohio, USA -   Aircraft without a tail rolling on its longitudinal axis. Explanation: Reflection.

In January 1952 Noon - Gallup, New Mexico, USA -   A daytime disc was reported.

In Early 1952 12:00 - Davis-Monthan AFB, Arizona , USA -   Photo