22 January 1952 00:20 - Nenana, Alaska, USA -   USAF F-94 incident. Explanation: Mirage.

22 January 1952 00:20 - Nenana, Alaska, USA -   A radar operator tracked an object travelling at 1500 mph, which could also reverse course and hover. F-94 interceptors were sent and also picked up the object on radar, but could see nothing in the night sky. Offical explanation: weather phenomena.

2 February 1952 - Pusan, South Korea -   Radar track of 767 mph unidentified target

2 February 1952 18:35 - Uss Philippine Sea, South Korea -   US Navy incident.

2 February 1952 19:35 - Pacific -   Two zigzagging targets observed visually and by radar from US naval vessel.

3 February 1952 19:35 - Pacific -   Objects were tracked by radar and sighted visually from USS Philippine Sea. Multiple independent witnesses. Two objects were observed by more than four male military witnesses in a warship for over three minutes.

11 February 1952 03:00 - Pittsburgh, Pennsylvania, USA -   Yellow orange comet-shaped object pulsing flame

12 February 1952 20:30 - Baltimore, Maryland, USA -   MATS incident. USAF C-47 saw two unidentified maneuvering objects during a single flight. Explanation: Aircraft.

13 February 1952 22:30 - Granite City, Illinois, USA -   An object was tracked by radar. One object was observed by a male military witness. Explanation: Malfunct.

15 February 1952 18:35 - Changsong-Ni, North Korea -   USMC F-51 incident. Explanation: Aircraft.

16 February 1952 - Pusan, South Korea -   Radar tracking of unidentified target traveling at 4,320 knots about 60 miles east of Pusan, South Korea

17 February 1952 - Roswell, New Mexico, USA -   Three-foot greenish-blue ball of fire flying straight at 15,000 ft.

18 February 1952 - Granite City, Illinois, USA -   An object was tracked by radar. An unidentified object was tracked by radar only by military witnesses.

20 February 1952 23:30 - Dublin, California, USA -   Bright yellow light on collision course climb and accelerate

24 February 1952 22:15 - Sinuiju, North Korea -   Bluish cylinder, 3x long as wide, with a tail and rapid pulsations

27 February 1952 - Fort Stockton, Texas, USA -   B-29 and radar sighting of UFO

March 1952 - Kansas City, Missouri, USA -   C-54 crew encounters maneuvering metallic saucer, observed for ten minutes (David C Brigham).

4 March 1952 10:35 - Ashiya AFB, Japan -   US C-54 incident. Bright orange oval object at 10,000 ft. Explanation: Meteor.

7 March 1952 01:00 - Tulsa, Oklahoma, USA -   Bright light pass from right to left, lose altitude and blink out three times

13 March 1952 07:12 - Keflavik, Atlantic -   Radar. Explanation: Mirage.

22 March 1952 06:33 - Yakima, Washington, USA -   Two sightings of a stationary red fireball increased in brightness

22 March 1952 18:05 - Yakima, Washington, USA -   USAF F-94 incident.

24 March 1952 08:45 - Point Conception, California , USA -   USAF B-29 incident. Unidentified target on airborne radar at about 3,000 mph.

25 March 1952 - St Lawrence Island, Alaska, USA -   An object was tracked by radar. An unidentified object was tracked by radar only by military witnesses. Explanation: Aircraft.

25 March 1952 21:05 - Gambell, Alaska, USA -   Objects were tracked by radar. Two objects were observed by more than two military witnesses for 22 minutes. Explanation: Aircraft.

26 March 1952 10:13 - Fort Stockton, Texas, USA -   Red and green running lights moving at high speed

26 March 1952 22:13 - B-50, Arizona , USA -   USAF incident. Explanation: Aircraft.

26 March 1952 22:30 - Fort Stockton, Texas, USA -   Radar photo, red and green running lights tracked, moved rapidly, 10-15 minutes duration.

29 March 1952 - Misawa, Japan -   Small, very thin, shiny metallic disc fly alongside the AT-6 Brigham Case

April 1952 - Hawaii, USA -   Navy Secretary executive plane encounters UFOs

In Spring 1952 Noon - Fort Monmouth, New Jersey, USA -   Flying discs were tracked by multiple radars and sighted visually. Less than six discs were observed by numerous male experienced military witnesses at a military facility for 20 minutes (Berkmann).

Spring 1952 - Radar Lab, New York, USA -   An object was tracked by radar. An unidentified object was tracked by radar.

2 April 1952 20:39 - Lometa Sw6M, Texas, USA -   Radar/visual confirmation.

4 April 1952 20:30 - Duncanville, Texas, USA -   Radar tracked unidentified target by FPS-10 radar

5 April 1952 01:30 - Duncanville, Texas, USA -   Project Blue Book "unidentified" case. Military radar. Blip tracked at 2160mph for one minute, no visual sighting.

7 April 1952 21:00 - Duncanville, Texas, USA -   Radar

9 April 1952 02:30 - Barksdale AFB, Louisiana, USA -   US C-46 incident. 30-40 feet cream color disc-shaped object. Explanation: Balloon.

13 April 1952 16:45 - Moriarty AFB, New Mexico, USA -   CPS-5 radar tracking of silver disc-shaped object. Explanation: Balloon.

14 April 1952 18:34 - Memphis, Tennessee, USA -   Inverted bowl glowing bright red, three feet long and one foot high

16 April 1952 Around 1900 - Nome, Alaska, USA -   Radar/visual confirmation.

17 April 1952 14:09 - Benton, Pennsylvania, USA -   Radar. Explanation: Aircraft.

18 April 1952 21:07 - Kyushu Nw50M, Japan -   Project Blue Book "unidentified" case. Unidentified radar target tracked at 2700mph for one minute.

18 April 1952 21:07 - Kyushu, Japan -   A radar operator tracked unidentified target at 2,700 mph.

19 April 1952 10:50 - Benton, Pennsylvania, USA -   Radar. Explanation: Aircraft.

20 April 1952 22:00 - Cleveland Apt, Ohio, USA -   Radar

20 April 1952 22:00 - Trenton Apt, Ontario, Canada -   Radar

24 April 1952 14:30 - Milton, Massachusetts, USA -   Two very thin flat, dull reddish orange squarish objects

8 May 1952 - Jacksonville, Florida, USA -   Brilliant white approached Pan Am Flight 203 from the left below solid overcast at 10,000 ft

13 May 1952 03:41 - X, California , USA -   An object was tracked by radar. One object was observed. Explanation: Meteor.

15 May 1952 11:00 - Chasong, North Korea -   Silvery oval shaped object larger than a MiG jet

15 May 1952 11:00 - Chasong, North Korea -   Silvery oval shaped object larger than a MiG jet

19 May 1952 19:55 - San Angelo, Texas, USA -   7 bright white circular or doughnut shaped white contrails,. Explanation: Balloon.

20 May 1952 22:10 - Houston, Texas, USA -   Bright or white oval object

22 May 1952 11:40 - Stockton, California , USA -   An object was tracked by radar and sighted visually. One object was observed by eight witnesses for over 25 minutes (Pickering). Explanation: Balloon.

23 May 1952 20:00 - Washington, District Of Columbia, USA -   Radar

24 May 1952 - Bellevue Hill, Vermont, USA -   Three circular, bluish objects in loose fingertip formation

25 May 1952 09:58 - Tierra Amarilla Afs, New Mexico, USA -   An object was tracked by radar. One object was observed by several military witnesses at a military facility for 42 seconds. Explanation: Malfunct.

26 May 1952 03:20 - Grid Area Ct 4856, South Korea -   USAF F-94C incident. Explanation: Flare.

26 May 1952 03:20 - North Korea -   Bright white object that accelerated to high speed and tracked by ground radar.

28 May 1952 13:45 - Albuquerque, New Mexico, USA -   Two circular objects

29 May 1952 - Saginaw Bay, Michigan, USA -   An object was tracked by radar. One object was observed.

29 May 1952 - -   Elliptical objects with apparent domes observed from USN aircraft carrier

30 May 1952 - Oshima, Japan -   Round black object first motionless then moving rapidly

In June 1952 - -   Attempted intercepts from various sites.

31 May 1952 - Chorwon, South Korea -   Multiple sightings

31 May 1952 04:20 - Chorwon S, South Korea -   F-94 incident. Explanation: Flare.

1 June 1952 10:00 - Los Angeles, California, USA -   Hughes radar engineers track an object climbing 35,000 feet per minute while traveling about 550 miles an hour

2 June 1952 Night - Fulda, Germany -   Porcelain-white object fly very fast for an unknown length of time. Explanation: Balloon.

3 June 1952 - Chicago, Illinois, USA -   An object was tracked by radar. An unidentified object was tracked by radar. Explanation: Malfunct.

12 June 1952 11:26 - Marrakech, Morocco -   Unidentified target at 650 knots at 60,000+ feet altitude

17 June 1952 19:30 - McChord AFB, Washington, USA -   Project Blue Book "unidentified" case. Many observers with theodolite. 5-6 fast discs, chased by USAF F-94s.

18 June 1952 - March AFB, California, USA -   UFO paced a USAF B-25 bomber 100 miles east of March AFB

19 June 1952 02:37 - Goose Bay, Newfoundland and Labrador, Canada -   One red light turned white while wobbling. Radar tracked a stationary object. Explanation: Weather.

21 June 1952 22:58 - Oak Ridge, Tennessee, USA -   F-47 intercepts craft nearing the Oak Ridge Laboratory. Explanation: Mars.

23 June 1952 19:35 - Kirksville, Missouri, USA -   Tracked one (two?) unidentified target with a clear sharp return

24 June 1952 - 752Nd Acw, Michigan, USA -   752nd ACW incident. Explanation: Weather.

25 June 1952 - Sea of Japan between Japan and Korea, Japan -   An object was tracked by radar. An unidentified object was tracked by radar (Various).

25 June 1952 - 752Nd Acw, Michigan, USA -   752nd ACW incident. Michigan.

27 June 1952 - 752Nd Acw, Michigan, USA -   752nd ACW incident. Explanation: Weather.

Summer 1952 - Albuquerque, New Mexico, USA -   Secret fighter base, Albuquerque, NM

In Mid- 1952 Night - Macdill AFB, Florida, USA -   USAF tracked, bomber saw egg-shaped UFO, maneuvered.

1 July 1952 07:25 - Boston, Massachusetts, USA -   Two silvery elliptical 10-foot-diameter UFOs were observed near Boston and an F-94 interceptor was scrambled. The UFOs then proceeded down the coast, being tracked by radar and seen in New Jersey and over Washington DC. Official explanation: balloon.

1 July 1952 09:30 - Fort Monmouth, New Jersey, USA -   12 radar operator students and three instructors, some of whom went outside to witness UFOs visually. Army secret lab. two UFOs, approaching slower than 9 jets being tracked at time. Explanation: Meteor.

1 July 1952 12:00 - Washington, District Of Columbia, USA -   Physics Professor GWU incident. Explanation: Meteor.

3 July 1952 01:10 - B-52, Colorado , USA -   Radar

3 July 1952 Around 2100 - Kirksville, Missouri, USA -   790th AC&W Squad. incident.

5 July 1952 - Elmendorf AFB, Alaska, USA -   An object was tracked by radar. An unidentified object was tracked by radar only by radar at an airfield.

5 July 1952 06:00 - Hanford, Washington, USA -   Four pilots report perfect circular white disc above the Hanford Atomic Works

8 July 1952 21:30 - St Paul, Minnesota, USA -   Several UFOs tracked on radar as USAF pilot attempts to intercept.

10 July 1952 - North Korea -   Near Korea,

10 July 1952 Night - Canadian Destroyer, South Korea -   RCN incident.

12 July 1952 20:00 - Indianapolis, Indiana, USA -   Huge disc turns to the northwest at 5000 feet altitude. AF radar tracking. Civilian and military pilots sight UFO.

12 July 1952 21:00 - Kirksville Afb, Missouri, USA -   Many military radar returns and radar photo. two B-36 sized blips, speed 1700 mph.

12 July 1952 21:04 - Arlington, Illinois, USA -   Oblong yellowish lighted object with a trail flying in a straight course

13 July 1952 - Kirksville, Missouri, USA -   Radar case. UFO seen on military radar, accompanied by scope photo. Traveled at 1500 knots. Possible weather balloon? AF lists as unknown. Explanation: Balloon.

13 July 1952 04:00 - Washington, District of Columbia, USA -   Bruen Case. Round ball of bluish-white light hovering

13 July 1952 21:00 - Kirksville, Michigan, USA -   Several big radar blips tracked at 1,500 knots

14 July 1952 Around 1000 - Holloman AFB, New Mexico, USA -   Technicians incident. Explanation: Balloon.

14 July 1952 21:12 - Norfolk, Virginia, USA -   Nash/Fortenberry Case

18 July 1952 - Denver, Colorado, USA -   Carpenter Case

19 July 1952 Night - F-94, Massachusetts, USA -   An object was tracked by radar and sighted visually. One object was observed by military witnesses in a warplane.

19 July 1952 23:40 - Washington, District of Columbia, USA -   Washington DC Flap / CAA incident. Numerous visual, radar and radar-visual sightings by ground observers and pilots in the air around Washington National Airport. Official explanation: mirage.

20 July 1952 01:00 - Herndon, Virginia , USA -   Capital Airlines DC-4 incident.

20 July 1952 01:00 - Washington, District Of Columbia, USA -   USAF incident.

20 July 1952 03:00 - Herndon, Virginia , USA -   Capital Airlines incident.

21 July 1952 - Marietta, Georgia, USA -   An object was tracked by radar. An unidentified object was tracked by radar.

21 July 1952 10:30 - Dobbins AFB, Georgia, USA -   UFO tracked at speed of 1200 mph, altitude 50,000 feet.

21 July 1952 22:20 - Elmendorf AFB, Alaska, USA -   An object was tracked by radar. An unidentified object was tracked by radar at an airfield.

22 July 1952 18:45 - Peterson Field, Colorado , USA -   Pilot saw a round silver object disappear into clouds

22 July 1952 22:45 - Mcdill Afb, Florida, USA -   USAF 364th Bomb Squad. incident.

22 July 1952 22:45 - MacDill AFB, Florida, USA -   High speed object over MacDill AFB tracked by ground radar

22 July 1952 22:50 - Haddon Heights, New Jersey, USA -   An object was tracked by radar and sighted visually. One orange light was observed by three military witnesses in a city. Explanation: Aircraft.

22 July 1952 22:50 - Boston, Massachusetts, USA -   Large round spinning object throwing off a blue light. Explanation: Balloon.

23 July 1952 - Braintree, Massachusetts, USA -  

23 July 1952 03:50 - Braintree, Massachusetts, USA -   Prison Guards incident. Explanation: Balloon.

23 July 1952 07:36 - Jamestown, Rhode Island, USA -   USN radar tracked high speed target

23 July 1952 20:20 - Misawa, Japan -   USAF pilot flying F-94 jet fighter chased blue-green fireball.

23 July 1952 21:00 - Washington, District Of Columbia, USA -   USAF incident.

23 July 1952 22:50 - Trenton, New Jersey, USA -   Crews of several USAF F-94 jet interceptors made 13 visual sightings

24 July 1952 After 0200 - Washington, District Of Columbia, USA -   Radar/visual confirmation.

24 July 1952 15:40 - Carson Sink, Nevada, USA -   USAF B-25 incident. Bomber crew sights, for three to four minutes, three silver-white, delta-shaped objects, slightly larger than F-86 fighters, crossing their course a quarter mile away at 1800 mph. Official explanation: aircraft.

24 July 1952 22:20 - Talkeetna Se, Alaska, USA -   Ground and air radar blip, jet vectored in, no visual, can't catch up at 550 knots.

25 July 1952 - Osceola, Wisconsin, USA -   An object was tracked by radar. An unidentified object was tracked by radar. Explanation: Malfunct.

25 July 1952 - Elmendorf AFB, Alaska, USA -   An object was tracked by radar. An unidentified object was tracked by radar only by radar at an airfield.

26 July 1952 00:15 - Newport News, Virginia , USA -   USAF F-94 incident.

26 July 1952 02:00 - F-94C, California , USA -   F-84 Crew incident.

26 July 1952 02:00 - Point Arena, California , USA -   An object was tracked by radar. An unidentified object was tracked by radar on a farm.

26 July 1952 12:15 - Hampton, Virginia, USA -   Brilliant luminous alternately bright silver, red and green object

26 July 1952 Around 1700 - Los Angeles, California , USA -   An unidentified object was tracked by radar and sighted visually (Ramsey). Explanation: Balloon.

26 July 1952 17:15 - Williams, California, USA -   Large orange yellow object moving fast and slow

26 July 1952 20:00 - Washington, District of Columbia, USA -   Andrews AFB and Washington National Airport (second event). Ground radars, numerous civilian and military crews track nocturnal lights. Official explanation: star.

26 July 1952 21:54 - Andrews AFB, Maryland, USA -   CAA incident. Explanation: AnomProp.

27 July 1952 - Belleville, Illinois, USA -   An object was tracked by radar. An unidentified object was tracked by radar. Explanation: Malfunct.

27 July 1952 Pre-dawn - Virginia , USA -   Objects were tracked by radar. Several objects were observed for six hours.

28 July 1952 - Michigan, USA -   Radar / visual sighting that raised eyebrows;

28 July 1952 02:15 - McChord AFB, Washington, USA -   Dull, glowing, blue green ball, size of a dime at arms' length

28 July 1952 06:00 - McGuire AFB, New Jersey, USA -   Radar tracked a large cluster of very distinct blips

29 July 1952 01:30 - Osceola, Wisconsin, USA -   P-51 Mustang incident. Explanation: Mirage.

29 July 1952 01:30 - Osceola, Wisconsin, USA -   Wisconsin/Minnesota Radar Case. Several clusters of up to ten small radar targets and one large target

29 July 1952 03:00 - Washington, District Of Columbia, USA -   CAA incident.

29 July 1952 14:30 - Langley AFB, Virginia , USA -   Project Blue Book "unidentified" case. After visual sighting 20 minutes earlier, radar target tracked moving away, stopped for two minutes, again moved very, very fast.

29 July 1952 14:30 - Langley AFB, Virginia , USA -   A radar target moving away, stopping for two minute, then again moving extremely fast about 2,600 mph

29 July 1952 21:40 - Port Huron, Michigan, USA -   Ground control radar and an F-94 interceptor chase a multi-colored ball-shaped UFO for 20 minutes. Official explanation: aircraft.

30 July 1952 Around midnight - Continental Divide, New Mexico, USA -   An object was tracked by radar and sighted visually. An unidentified object was tracked by radar and sighted visually by several witnesses for 40 minutes.

30 July 1952 15:20 - Atlanta, Georgia, USA -   An object was tracked by radar and sighted visually. An unidentified object was tracked by radar and sighted visually in a city. Explanation: Balloon.

In August 1952 00:03 - F-94, Japan -   USAF F-94 incident.

1 August 1952 05:00 - Yaak, Montana, USA -   ADC incident. Radar / visual sighting

1 August 1952 10:51 - Troy, Ohio, USA -   An object was tracked by radar and sighted visually and filmed by F-86 interceptors. Official explanation: balloon.

3 August 1952 15:13 - Hamilton AFB, California , USA -   USAF F-86 incident. Explanation: Balloon.

5 August 1952 11:00 - Haneda AFB, Japan -   Dark shape with a light was seen by USAF ground staff, and also tracked by radar, but could not be seen by an F-94 crew sent to intercept it, despite the fighter and the object both being tracked.

5 August 1952 13:12 - Washington, District Of Columbia, USA -   Objects were tracked by radar and sighted visually. More than two discs, larger than a star, were observed by one experienced male military witness at an airport for several hours (Bartlett; Conn; Holmes). Explanation: Aircraft.

5 August 1952 23:30 - Haneda Afb, Japan -   Control Tower incident. Explanation: AnomProp.

6 August 1952 15:00 - Washington, District Of Columbia, USA -   An object was tracked by radar and sighted visually. An unidentified object was tracked by radar and sighted visually by one witness at an airport (Morrison).

9 August 1952 - Pohang, South Korea -   Fireball with stream of flame pass an aircraft

9 August 1952 20:57 - Grid Area K-3, South Korea -   USN 1st Navy Air Wing incident. Explanation: Star.

13 August 1952 - Tucson, Arizona , USA -   Three objects were observed (Thompson).

13 August 1952 20:00 - Washington, District Of Columbia, USA -   Radar. Explanation: Mirage.

17 August 1952 20:50 - Duncanville, Texas, USA -   An object was tracked by radar. An unidentified object was tracked by radar and sighted visually by military witnesses at a military facility.

19 August 1952 00:50 - San Gorgonio Mtns Nw, California , USA -   Fighters incident.

19 August 1952 20:00 - Boron, California, USA -   Ground Observer Corps spotter saw two objects, shaped like fat bullets. Explanation: Aircraft.

20 August 1952 10:00 - Congaree AFB, South Carolina, USA -   Air Defense Command radar tracked UFO 60 miles from base, speed 4000 mph

23 August 1952 04:10 - Akron, Ohio, USA -   Pulsing amber light fly straight and level

26 August 1952 Night - Washington, District Of Columbia, USA -   CAA incident.

28 August 1952 22:20 - Chickasaw, Alabama, USA -   Multiple, red and blue-green, stationary and maneuvering, objects were sighted visually and tracked by radar over several days in overcast weather by 10 independent male experienced military witnesses for up to 50 minutes. No sound was heard.

29 August 1952 10:50 - Thule, Greenland -   Three white disc-shaped or spherical objects hover, then fly very fast

In September 1952 Around 2200 - Brookley AFB, Alabama, USA -   An object was tracked by radar and sighted visually. One object was observed by four male experienced military witnesses at an airfield.

1 September 1952 04:45 - Yaak, Montana, USA -   Two small, varicolored lights became black silhouettes

2 September 1952 03:00 - Chicago, Illinois, USA -   40 radar targets flying in miscellaneous directions. Explanation: AnomProp.

14 September 1952 - Iceland -   North Sea area/military exercise

16 September 1952 18:22 - Portland, Maine, USA -   Group of five lights in circular formation at the same time

Fall 1952 - -   Fall of 1952, from New York to Puerto Rico

In October 1952 Around 2200 - Trenton, New Jersey, USA -   Eastern Airlines Martin 404 enroute Wash-Boston, speed 225 knots, crew sighted blue-white that changed to yellow colored elliptical shaped when accelerating. Climbed and accelerated away.

29 October 1952 - Richmond, Virginia, USA -   Venezuelan Airliner incident. Rivas Case

29 October 1952 02:00 - Hempstead, New York, USA -   White luminous object maneuvering at high speed, tracked on airborne radar

13 November 1952 02:20 - Opheim, Montana, USA -   Project Blue Book "unidentified" case. Explanation: Weather.

13 November 1952 02:20 - Opheim, Montana, USA -   US Weather Bureau and USAF radar crew track objects visually and by radar at 158,000 feet altitude.

15 November 1952 20:25 - Wichita, Texas, USA -   Elliptical, blue-white light with an orange or red tail

16 November 1952 09:45 - Rhein-Main AFB, Germany -   AF radar tracks low speed, low altitude, invisible objects for over 8 hours. Explanation: Weather.

25 November 1952 12:00 - Panama, Panama, Panama -   Two objects traveling at an estimated speed of 275 mph were detected by radar attached to anti-aircraft guns. Glowing yellow lights seen in partly cloudy weather by two ground observors at a military facility for five hours. Official explanation: balloon.

In 1953 - Kunashir Island, Russia -   Airplane coming in from Pacific Ocean mysteriously vanished as observers looked at it, first visually then on radar screens.

In 1953 - Perrin AFB, Texas, USA -   Radar blip detected at Dallas, F-86 fighters from Perrin Field, Denver, Salt Lake ordered to intercept and destroy. UFOs crossed Oklahoma border toward Texas, stopped, 90 degree turn, rapidly to the northwest at 8000 mph. Debriefed four hours!

1953 - -   USN incident. Navy AD3 attack planes paced UFO

30 November 1952 00:30 - Washington, District of Columbia, USA -   Radar at Washington National Airport tracks similar to those of July 26,1952. Drunken ground report later in the day. Explanation: Aircraft.

4 December 1952 03:42 - Congaree AFB, South Carolina, USA -   Radar tracks 6,000 mph object. Explanation: Malfunct.

4 December 1952 20:53 - Laredo, Texas, USA -   Blue white object almost crashes into fighter

6 December 1952 05:25 - B-29, Guam, USA -   USAF B-29 incident. Explanation: AnomProp.

6 December 1952 05:35 - Gulf of Mexico -   Tracked on radar four high speed targets

6 December 1952 14:00 - Bitburg, Germany -   Unknown phenomenon crossed the nose of an airliner and abruptly disappeared in a downward direction. Explanation: Meteor.

8 December 1952 20:16 - Ladd AFB, Alaska, USA -   White, oval light which changed to red at higher altitude

9 December 1952 17:45 - Madison, Wisconsin, USA -   Four bright lights, in diamond formation

10 December 1952 09:20 - Pope Afb 8M, Sc, North Carolina, USA -   Radar. Explanation: Mirage.

10 December 1952 19:15 - Odessa, Washington, USA -   Two pilots in an F-94 made visual and radar contact with a large, round, white object. The object hovered, reversed direction almost instantaneously and disappeared. Official explanation: Balloon.

12 December 1952 00:25 - McGuire Air Force Base, New Jersey, USA -   Two observations made of an unidentified light

12 December 1952 03:00 - London, UK -   Watermelon-shaped object of white light

12 December 1952 19:15 - Los Alamos, New Mexico, USA -   An object which appeared as a white tennis ball leaving a trail of sparks. Explanation: Meteor.

14 December 1952 03:50 - Tsutsu, Japan -   An object was tracked by radar and sighted visually. An unidentified object was tracked by radar and sighted visually by several witnesses on the shore.

15 December 1952 - Honshu, Japan -   An object was tracked by radar. An unidentified object was tracked by radar.

15 December 1952 09:15 - Hurstville, South Carolina, USA -   RF-80 sighted a circular silver object about the size of a half-dollar.

15 December 1952 19:15 - Goose Bay, Newfoundland and Labrador, Canada -   F-94 chased maneuverable disc that changed color from white to red, which was also tracked by ground and airborne radar. A T-33 crew also sighted it. Explanation: Malfunct.

17 December 1952 21:20 - Newcastle, Indiana, USA -   A round and flat object of orange color moving from east to west

18 December 1952 - Oak Ridge, Tennessee, USA -   Radar / Visual Sighting

18 December 1952 08:28 - Itazuke Afb, Japan -   An object was tracked by radar. One object was observed by a male military witness at an airfield for nine minutes. Explanation: Mirage.

24 December 1952 12:15 - Dallas, Texas, USA -   USAF B-36 incident.

29 December 1952 - Japan -   An unidentified object was tracked by radar and sighted visually.

29 December 1952 19:30 - F-94, Japan -   USAF incident. Explanation: Venus.

29 December 1952 19:30 - Chitose, Japan -   Object emitting three beams of light and tracked on airborne radar