SkyUnknown

UFO sightings by place

UFO sightings in Val-d'Oise: 39 reports

SkyUnknown lists 39 UFO sightings in Val-d'Oise, from 1978 to 2023, drawn from official records: GEIPAN (CNES). The busiest year was 2009, with 5 cases.

Of the 39 cases with a conclusion from their source, 56% are explained (with certainty or probably), 38% lack the data to conclude, and 2 remain unidentified. The most frequent identified causes: aircraft (5); sky lanterns (5); balloons (3).

Most frequently named places: Cergy (6), Sarcelles (2), Franconville (2), Montmorency (2), and Roissy-en-France (2).

cases
39
unidentified
2
period
1978–2023
source
1
Map of the cases

Notable cases

The most complete records: account of the sighting, conclusion of the official investigation.

Other departments in the region

Sightings by decade

4
1970s4
1980s2
1990s9
2000s16
2010s4
2020s

Identified causes

For cases explained with certainty or probably.

All sightings

DatePlaceStatus
April 13, 2023Montmorency · Val-d'OiseExplained
September 3, 2021Groslay · Val-d'OiseExplained
December 18, 2020Montmorency · Val-d'OiseExplained
November 26, 2020Cergy · Val-d'OiseExplained
April 18, 2016Roissy-en-France · Val-d'OiseProbably explained
December 24, 2015Asnières-sur-Oise · Val-d'OiseProbably explained
September 27, 2014Deuil-la-Barre · Val-d'OiseExplained
August 16, 2014Cergy · Val-d'OiseProbably explained
May 15, 2014Eaubonne · Val-d'OiseProbably explained
March 15, 2014Osny · Val-d'OiseInsufficient data
January 1, 2014Pontoise · Val-d'OiseProbably explained
October 16, 2013Vienne-en-Arthies · Val-d'OiseProbably explained
September 5, 2013Saint-Ouen-l'Aumône · Val-d'OiseProbably explained
July 25, 2013Cergy · Val-d'OiseProbably explained
March 18, 2013Domont · Val-d'OiseExplained
June 29, 2012Maffliers · Val-d'OiseUnexplained
April 8, 2011Franconville · Val-d'OiseExplained
September 5, 2010Fontenay-en-Parisis · Val-d'OiseProbably explained
July 1, 2010Cergy · Val-d'OiseProbably explained
January 4, 2010Taverny · Val-d'OiseUnexplained
July 4, 2009Sarcelles · Val-d'OiseInsufficient data
June 27, 2009Franconville · Val-d'OiseInsufficient data
May 10, 2009Magny-en-Vexin · Val-d'OiseProbably explained
January 19, 2009Chars · Val-d'OiseProbably explained
January 11, 2009Ermont · Val-d'OiseInsufficient data
October 13, 2005Luzarches · Val-d'OiseInsufficient data
July 7, 2005Roissy-en-France · Val-d'OiseInsufficient data
June 19, 2005Seugy · Val-d'OiseInsufficient data
2005Courdimanche · Val-d'OiseInsufficient data
December 27, 1997Cergy · Val-d'OiseProbably explained
September 1991Cergy · Val-d'OiseInsufficient data
April 13, 1988Marines · Val-d'OiseInsufficient data
September 11, 1983Saint-Gratien · Val-d'OiseInsufficient data
December 16, 1980Sarcelles · Val-d'OiseInsufficient data
August 7, 1980Taverny · Val-d'OiseInsufficient data
November 26, 1979Cergy Pontoise · Val-d'OiseProbably explained
July 28, 1979Herblay · Val-d'OiseInsufficient data
July 13, 1979Argenteuil · Val-d'OiseInsufficient data
May 5, 1978Gonesse · Val-d'OiseProbably explained
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The figures on this page are computed from the official records cited on each case. See sources and method