UFO sightings by place
UFO sightings in Seine-et-Marne: 55 reports
SkyUnknown lists 55 UFO sightings in Seine-et-Marne, from 1978 to 2025, drawn from official records: GEIPAN (CNES). The busiest year was 2014, with 8 cases.
Of the 55 cases with a conclusion from their source, 67% are explained (with certainty or probably), 29% lack the data to conclude, and 2 remain unidentified. The most frequent identified causes: sky lanterns (12); aircraft (9); ground lights and lasers (3).
Most frequently named places: Fontainebleau (3), Melun (2), Gouvernes (2), Chartrettes (2), and Meaux (2).
- cases
- 55
- unidentified
- 2
- period
- 1978–2025
- source
- 1
Notable cases
The most complete records: account of the sighting, conclusion of the official investigation.
- UnexplainedJune 24, 1994
Ussy-sur-Marne
Seine-et-Marne, Île-de-France, France
GEIPAN (CNES)
- UnexplainedJanuary 28, 1994
« Af3532 » [aero Afr] Coulommiers
Seine-et-Marne, Île-de-France, France
GEIPAN (CNES)
- ExplainedDecember 19, 2025
Samoreau
Seine-et-Marne, Île-de-France, France
→ Sky lanterns
GEIPAN (CNES)
- Probably explainedNovember 25, 2024
Mitry-Mory
Seine-et-Marne, Île-de-France, France
→ Ground lights and lasers
GEIPAN (CNES)
- Probably explainedJuly 21, 2024
Saint-Martin-en-Bière
Seine-et-Marne, Île-de-France, France
→ Drones
GEIPAN (CNES)
- Probably explainedOctober 29, 2023
Fontainebleau
Seine-et-Marne, Île-de-France, France
→ Birds, insects, nature
GEIPAN (CNES)
- ExplainedJune 12, 2022
Chanteloup-en-Brie
Seine-et-Marne, Île-de-France, France
→ Balloons
GEIPAN (CNES)
- ExplainedNovember 25, 2021
Crégy-lès-Meaux
Seine-et-Marne, Île-de-France, France
→ Meteors and fireballs
GEIPAN (CNES)
- Probably explainedNovember 12, 2021
Vulaines-sur-Seine
Seine-et-Marne, Île-de-France, France
→ Aircraft
GEIPAN (CNES)
Other departments in the region
Identified causes
For cases explained with certainty or probably.
All sightings
| Date | Place | Status | Identified cause |
|---|---|---|---|
| December 19, 2025 | Samoreau · Seine-et-Marne | Explained | Sky lanterns |
| November 25, 2024 | Mitry-Mory · Seine-et-Marne | Probably explained | Ground lights and lasers |
| July 21, 2024 | Saint-Martin-en-Bière · Seine-et-Marne | Probably explained | Drones |
| October 29, 2023 | Fontainebleau · Seine-et-Marne | Probably explained | Birds, insects, nature |
| June 12, 2022 | Chanteloup-en-Brie · Seine-et-Marne | Explained | Balloons |
| November 25, 2021 | Crégy-lès-Meaux · Seine-et-Marne | Explained | Meteors and fireballs |
| November 12, 2021 | Vulaines-sur-Seine · Seine-et-Marne | Probably explained | Aircraft |
| October 5, 2021 | Savigny-le-Temple · Seine-et-Marne | Insufficient data | |
| August 4, 2017 | Émerainville · Seine-et-Marne | Explained | Aircraft |
| June 5, 2017 | Émerainville · Seine-et-Marne | Explained | Aircraft |
| November 11, 2016 | Villeneuve-les-Bordes · Seine-et-Marne | Explained | Stars |
| June 14, 2015 | Orly-sur-Morin · Seine-et-Marne | Probably explained | Ground lights and lasers |
| March 7, 2015 | Gouvernes · Seine-et-Marne | Probably explained | Sky lanterns |
| March 5, 2015 | Longueville · Seine-et-Marne | Explained | Aircraft |
| March 3, 2015 | Vaux-le-Pénil · Seine-et-Marne | Insufficient data | |
| October 18, 2014 | Vaux-le-Pénil · Seine-et-Marne | Probably explained | Aircraft |
| October 13, 2014 | Louan-Villegruis-Fontaine · Seine-et-Marne | Insufficient data | |
| September 28, 2014 | Trilbardou · Seine-et-Marne | Probably explained | Sky lanterns |
| September 7, 2014 | Provins · Seine-et-Marne | Probably explained | Optical phenomena |
| July 31, 2014 | Claye-Souilly · Seine-et-Marne | Probably explained | Sky lanterns |
| July 27, 2014 | Jablines · Seine-et-Marne | Insufficient data | |
| June 8, 2014 | Saint-Germain-sur-Morin · Seine-et-Marne | Explained | Optical phenomena |
| April 20, 2014 | Treuzy-Levelay · Seine-et-Marne | Probably explained | Sky lanterns |
| December 10, 2013 | Maincy · Seine-et-Marne | Probably explained | Sky lanterns |
| May 10, 2013 | Nemours · Seine-et-Marne | Probably explained | Sky lanterns |
| March 15, 2013 | Chessy · Seine-et-Marne | Probably explained | Sky lanterns |
| October 5, 2012 | Dammartin-en-Goële · Seine-et-Marne | Insufficient data | |
| March 21, 2011 | Lieusaint · Seine-et-Marne | Probably explained | Meteors and fireballs |
| June 5, 2010 | Tournan-en-Brie · Seine-et-Marne | Explained | Sky lanterns |
| December 31, 2009 | Melun · Seine-et-Marne | Probably explained | Sky lanterns |
| August 29, 2009 | Courtry · Seine-et-Marne | Probably explained | Sky lanterns |
| August 22, 2009 | Fontainebleau · Seine-et-Marne | Insufficient data | |
| May 2, 2009 | Chalifert · Seine-et-Marne | Insufficient data | |
| April 22, 2009 | Chartrettes · Seine-et-Marne | Insufficient data | |
| March 13, 2009 | Noisiel · Seine-et-Marne | Probably explained | Aircraft |
| December 18, 2008 | Chartrettes · Seine-et-Marne | Insufficient data | |
| July 20, 2008 | Coutevroult · Seine-et-Marne | Explained | Aircraft |
| June 2008 | Chelles · Seine-et-Marne | Probably explained | Aircraft |
| April 16, 2008 | Lagny-sur-Marne · Seine-et-Marne | Explained | Ground lights and lasers |
| June 20, 2006 | Fontainebleau · Seine-et-Marne | Probably explained | Sky lanterns |
| September 15, 2003 | Gouvernes · Seine-et-Marne | Insufficient data | |
| July 24, 1995 | Vaires-sur-Marne · Seine-et-Marne | Probably explained | |
| June 24, 1994 | Ussy-sur-Marne · Seine-et-Marne | Unexplained | |
| January 28, 1994 | « Af3532 » [aero Afr] Coulommiers · Seine-et-Marne | Unexplained | |
| May 12, 1992 | Guérard · Seine-et-Marne | Probably explained | Aircraft |
| May 4, 1990 | Sivry-Courtry · Seine-et-Marne | Insufficient data | |
| June 1989 | Meaux · Seine-et-Marne | Probably explained | |
| July 15, 1983 | Avon · Seine-et-Marne | Probably explained | |
| February 27, 1982 | Salins · Seine-et-Marne | Insufficient data | |
| November 1, 1981 | Saint-Fiacre · Seine-et-Marne | Insufficient data | |
| September 22, 1981 | La Chapelle-la-Reine · Seine-et-Marne | Insufficient data | |
| September 5, 1980 | Beton-Bazoches · Seine-et-Marne | Insufficient data | |
| August 9, 1980 | Coulommiers · Seine-et-Marne | Probably explained | |
| February 17, 1980 | Melun · Seine-et-Marne | Insufficient data | |
| December 19, 1978 | Meaux · Seine-et-Marne | Explained |
The figures on this page are computed from the official records cited on each case. See sources and method