Introduction

For Val-d’Oise, the practical takeaway is clear: the department is not a “UFO hotspot” in the sensational sense. It is better understood as a compact case study in how strange reports arise in a densely populated, aviation-heavy, media-sensitive part of Île-de-France — and how the best cases differ from weak, misidentified or fabricated ones.

Why Val-d’Oise matters in French UFO history

Val-d’Oise sits immediately north of Paris and includes Cergy-Pontoise, Argenteuil, Taverny, Maffliers, Franconville and parts of the Roissy airport environment. That geography matters. Witnesses are often observing from urban edges, woods, balconies, workplaces, village roads or commuter areas, with aircraft, clouds, railways, balloons, festive lanterns and bright astronomical objects all competing for attention. Charles de Gaulle Airport is officially based at Roissy-en-France in Val-d’Oise and extends into nearby communes and departments, so aircraft-related explanations are a recurring background factor even when they do not solve a specific case.[France-Voyage.com]france-voyage.comAirport of Paris-Charles de GaulleAirport of Paris-Charles de Gaulle

There is also a military and air-defence backdrop. Taverny was long associated with the former Air Base 921 and strategic air command facilities, though this should not be over-interpreted: the famous Taverny UFO case is not a radar or military encounter, but a single-witness visual report made by a walker in an urban wooded area. The local aviation context helps explain why GEIPAN investigators paid close attention to aircraft hypotheses, not why the case should be treated as a military mystery.[Wikipedia]WikipediaTaverny Air BaseTaverny Air Base

GEIPAN’s terminology is deliberately cautious. It generally uses UAP rather than UFO because many reports do not establish that there was a physical “object” at all. Its mission is not to prove extraterrestrial visitation, but to collect reports, investigate them, test explanations and publish anonymised conclusions. It works with partners including the gendarmerie, police, the Air and Space Force, CNRS and the French weather service.[GEIPAN]cnes-geipan.frGEIPANMission & Geipan | GEIPANGEIPANMission & Geipan | GEIPAN

The Cergy-Pontoise affair: the famous case that weakened itself

The best-known Val-d’Oise UFO story is the Cergy-Pontoise “abduction” affair of 1979. On 26 November 1979, Franck Fontaine, a 19-year-old, was reported missing after an alleged early-morning encounter with a luminous phenomenon near Cergy-Pontoise. Contemporary and later accounts describe his friends saying that lights or small spheres had appeared around a car before Fontaine vanished. He reappeared about a week later, claiming little or no memory at first, before the story expanded into claims of extraterrestrial contact.[Encyclopedia.com+2leparisien.fr]encyclopedia.comCergy-Pontoise Hoax | Encyclopedia.comCergy-Pontoise Hoax | Encyclopedia.com

The case mattered because it moved quickly from a local missing-person inquiry into a national UFO spectacle. Police and gendarmes searched fields and the Oise area; journalists arrived; UFO writers and television programmes amplified the story; and later claims included supposed messages from extraterrestrial intelligences and predicted public “appointments” with aliens. Reports in later French media describe thousands of curious people gathering in expectation of a promised landing that did not occur.[leparisien.fr+2RTL.fr]leparisien.frOpen source on leparisien.fr.

What makes Cergy-Pontoise important for a Val-d’Oise UFO history is not that it is a strong case. It is important because it became a textbook example of how a dramatic UFO narrative can grow through media attention, group reinforcement and public expectation, while the underlying evidence remains fragile. GEPAN, GEIPAN’s predecessor, investigated and treated the affair as having no evidential value for the study of UFOs; a 1980 press report summarising the CNES position described the “abduction” as fabrication in substance.[ufologie.patrickgross.org]ufologie.patrickgross.orgOpen source on patrickgross.org.

The later collapse of the story is central. In 1983, Jean-Pierre Prévost reportedly confessed that the affair was false and that Fontaine had spent the missing period hidden in an apartment. RTL’s retrospective account says the three friends eventually admitted the hoax, while Encyclopedia.com states that Prévost said he had organised the event to draw attention to his message-based beliefs. Some later writers have kept more elaborate interpretations alive, but the mainstream evidential assessment is simple: Cergy-Pontoise is historically notable, locally memorable and culturally revealing, but it is not a reliable UFO event.[RTL.fr+2Encyclopedia.com]rtl.frOpen source on rtl.fr.

The two strongest unresolved GEIPAN files

The strongest Val-d’Oise material comes from GEIPAN cases where investigators had enough detail to test ordinary explanations but still did not reach a satisfying solution. “Unexplained” here does not mean “alien”; it means the case resisted the available explanations after the investigation, within the limits of the evidence.

Taverny, 4 January 2010: a dark triangle in the flight-path landscape

The Taverny case began at about 19:45 on 4 January 2010, when a single witness walking in a wooded urban area reported a large dark triangular form moving east to west. The object was described as silent, with weak yellow-orange circular lights at each end, and the observation lasted roughly 10 to 15 seconds. No photograph, video or second witness was obtained.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

GEIPAN’s assessment is careful rather than dramatic. Investigators found that the testimony was coherent enough to deserve credit, and they did not think the report matched common misidentifications well. An airliner explanation was considered unsuitable, partly because the witness was used to seeing aircraft in the area. A small model aircraft or drone of about 2.5 metres at low altitude was physically compatible with the report, but GEIPAN judged that scenario unlikely in an urban setting, at night, in winter, and without supporting evidence. The case was classified D1: unexplained, with medium evidential consistency.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

The case’s value lies in the contrast between strangeness and weakness. A silent triangular shape is visually memorable and culturally loaded, especially in UFO lore, but the file still rests on a single short observation with no image and no corroboration. That is why Taverny should be treated as one of Val-d’Oise’s better unresolved reports, not as a landmark proof case.

UFO hoax fools several French media • FRANCE 24 English

Channel: FRANCE 24 English

Open on YouTube

Maffliers, 29 June 2012: a white luminous object near sunrise

The Maffliers case is arguably the most interesting official Val-d’Oise UAP file. At about 06:06 on 29 June 2012, a man walking his dog near a field and forest edge reported seeing a huge white luminous object stationary at low altitude above a wheat field. The observation lasted under 20 seconds. The witness described the object as flat underneath and concave above; it then rose slightly, tilted and departed rapidly and silently into a cloudy sky. No other witness came forward.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

GEIPAN found an obvious candidate explanation: the rising sun seen through unusual cloud layers. But the details did not fit cleanly. Investigators noted a major directional problem — the reported line of sight differed from the sun by about 54 degrees — and also highlighted the apparent size, which was said to be almost ten times larger than the sun’s disc. They considered perceptual effects, cloud conditions and possible complex reflections, but did not establish a satisfactory explanation. The case is listed by GEIPAN as an unexplained phenomenon of medium or strong consistency, with an “strangeness” value of 0.62 in the public case page.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

Maffliers matters because it shows GEIPAN’s method at its most useful for the public. The investigators did not simply accept the witness’s interpretation, nor did they force the most convenient explanation. They tested the sunrise hypothesis, found that some parts fitted and others did not, and left the case unresolved. That is a more valuable conclusion than a false certainty in either direction.

The explained, weak and doubtful cases are just as important

Many Val-d’Oise reports are useful precisely because they show how ordinary phenomena become UFO reports. They also show why case classification matters. GEIPAN’s classification method weighs both residual strangeness and “consistency”, meaning the quantity and reliability of information gathered. A case can sound impressive but still be weak if there are no measurements, no independent witnesses, no images, or no follow-up questionnaire.[GEIPAN]cnes-geipan.frmethodologie classification geipanmethodologie classification geipan

The Argenteuil case of 13 July 1979 is a good example of an older report weakened by missing data. Two witnesses on a seventh-floor balcony described a red-orange light moving towards Paris, apparently stopping above the La Défense-Nanterre area and going out, followed minutes later by a bright white form that moved or disappeared rapidly. GEIPAN later considered possible explanations involving an aircraft and a bright meteor-like event, but the file lacked essential details such as precise angular height, verified duration, accurate directions and separate testimony from the second witness. The case was reclassified C: unusable for lack of reliable information.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

Franconville, 27 June 2009, shows another common pattern: many orange lights at night. A witness reported by telephone seeing about 50 orange luminous balls, with other people in the building allegedly observing them too. GEIPAN noted that the description strongly suggested flying sky lanterns, but the witness did not provide the necessary questionnaire or official statement despite follow-up. The case therefore remained class C, not because it was especially mysterious, but because the information was too thin to investigate properly.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

Fontenay-en-Parisis, 5 September 2010, is stronger as an explanation case. A family reported three silent luminous spheres between 01:10 and 01:30, with mobile-phone photographs. GEIPAN found that the timing, colour, silence, repeated lights, constant-speed path and wind compatibility all pointed towards sky lanterns, with a local village hall rented at the relevant time as a possible source. The case was classified B: probable sky lanterns.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

The 2013 cluster in and around Cergy, Saint-Ouen-l’Aumône and Vienne-en-Arthies is especially revealing. Cergy on 25 July 2013 was classified as probable sky lanterns. Saint-Ouen-l’Aumône on 5 September 2013 involved a witness seeing intense white flashes near a relay mast; GEIPAN’s field inquiry found that flashes from the pantograph of an electric train on a curved railway line about 2.5 kilometres away explained almost all the described features. Vienne-en-Arthies on 16 October 2013 was classified as a probable hoax after GEIPAN judged the reference photograph to be certainly inauthentic, even if the witness’s narrative itself seemed sincere.[GEIPAN+2GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

What patterns stand out across the department?

The first pattern is that Val-d’Oise reports are often shaped by the built environment. Balconies, roads, workplaces, railway lines, flight paths, relay masts, forests and fields all appear in the case material. That means a witness may be sincere and still misread distance, size, height, direction or speed. The Saint-Ouen-l’Aumône train-flash explanation is a particularly good reminder that a light need not be in the sky to be perceived as an aerial anomaly.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

The second pattern is the importance of orange lights. Franconville, Fontenay-en-Parisis, Cergy and Pontoise-type entries fit a wider post-2000 pattern in which sky lanterns generated many UFO reports across Europe. In Val-d’Oise, GEIPAN’s classifications repeatedly show lanterns as probable explanations where witnesses reported silent, warm-coloured lights moving in groups or sequences.[GEIPAN+3GEIPAN+3GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

Le canular de l’enlèvement par des OVNIS d’un jeune homme en 1979

Channel: Europe 1

Open on YouTube

How to read a Val-d’Oise UFO claim responsibly

A good Val-d’Oise UFO claim should be judged less by how strange it sounds and more by what can be checked. The strongest files tend to have a precise time, place, duration, viewing direction, weather context, witness interview, site reconstruction and attempts to test aircraft, astronomical, meteorological and human-made explanations. Maffliers is a good example because GEIPAN explicitly tested a sunrise-and-cloud hypothesis and found both matching and non-matching elements.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

Weak cases usually fail for predictable reasons: no independent witness, no original report, no questionnaire, no photograph, no angular data, vague timing, or witnesses who may have influenced each other. Argenteuil and Franconville both show how a potentially interesting report can become unusable because the surviving information is too limited. A class C case should not be retold as a mystery that official investigators “could not explain”; it is more accurately a case they could not use.[GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

The most doubtful cases have another warning sign: the evidence changes shape after publicity. Cergy-Pontoise began as a missing-person and luminous-object claim, then expanded into extraterrestrial contact, public predictions, books and television attention, before later confession and debunking accounts overtook the original narrative. Vienne-en-Arthies is smaller but points to the same lesson: once a key photograph is judged inauthentic, the apparent sincerity of a story cannot rescue the case as evidence.[VICE]vice.comL’affaire de l’ovni de Cergy-PontoiseL’affaire de l’ovni de Cergy-Pontoise

Bottom line

Val-d’Oise’s UFO history is best read as a spectrum. At one end are explained or probably explained reports: sky lanterns at Fontenay-en-Parisis and Cergy, electric-train flashes at Saint-Ouen-l’Aumône, and likely ordinary causes behind several orange-light accounts. In the middle are weak or unusable files such as Argenteuil and Franconville, where too much essential information is missing. At the unresolved end are Taverny and Maffliers, both single-witness cases but both documented enough for GEIPAN to say that no satisfactory explanation was established.[GEIPAN+5GEIPAN+5GEIPAN]cnes-geipan.frOpen source on cnes-geipan.fr.

The department’s most famous UFO story, Cergy-Pontoise, belongs in the history — but as a cautionary tale about media, belief and hoax dynamics, not as a strong sighting. The most serious Val-d’Oise material is quieter: public investigation files, careful classification, plausible explanations where they fit, and a small number of unresolved observations that remain interesting precisely because the official record does not overclaim them.<section class="further-reading-section" data-page-toc-exclude aria-labelledby="further-reading-title"><div class="fr-section-shell"><div class="fr-section-header"><div class="fr-section-heading"><p class="fr-section-kicker">Amazon book picks</p><h3 class="fr-heading" id="further-reading-title">Further Reading</h3></div><p class="fr-intro">Books and field guides related to What Really Happened in Val d'Oise?. 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Endnotes

1. Source: cnes.fr
Title: GEIPAN | CNES
Link:https://cnes.fr/en/projects/geipan

2. Source: cnes-geipan.fr
Title: GEIPANMission & Geipan | GEIPAN
Link:https://www.cnes-geipan.fr/en/missions-methodes-et-resultats

3. Source: france-voyage.com
Title: Airport of Paris-Charles de Gaulle
Link:https://www.france-voyage.com/cities-towns/roissy-en-france-36524/airport-paris-charles-gaulle-50.htm

4. Source: Wikipedia
Title: Taverny Air Base
Link:https://en.wikipedia.org/wiki/Taverny_Air_Base

5. Source: encyclopedia.com
Title: Cergy-Pontoise Hoax | Encyclopedia.com
Link:https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/cergy-pontoise-hoax

6. Source: leparisien.fr
Link:https://www.leparisien.fr/val-d-oise-95/cergy-il-y-a-36-ans-franck-passait-sept-jours-avec-des-extraterrestres-25-11-2015-5312475.php

7. Source: rtl.fr
Link:https://www.rtl.fr/actu/debats-societe/j-ai-ete-enleve-par-les-extraterrestres-ce-canular-qui-a-passionne-les-medias-dans-les-annees-80-7900236097

8. Source: vice.com
Title: L’affaire de l’ovni de Cergy-Pontoise
Link:https://www.vice.com/fr/article/peur-sur-la-france-affaire-ovni-cergy-pontoise/

9. Source: ufologie.patrickgross.org
Link:https://www.ufologie.patrickgross.org/press/sudouest6jun1980.htm

10. Source: cnes-geipan.fr
Title: methodologie classification geipan
Link:https://www.cnes-geipan.fr/en/actualites/methodologie-classification-geipan

11. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/fr/recherche/cas/tab?field_agregation_index_value=&field_classification_des_cas_target_id%5B0%5D=12&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=&field_latitude_value%5Bmin%5D=&field_longitude_value%5Bmax%5D=&field_longitude_value%5Bmin%5D=&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_departement_textuel&page=58%2C15&sort=asc

12. Source: Wikipedia
Link:https://en.wikipedia.org/wiki/GEIPAN

13. Source: Wikipedia
Title: Val d’Oise
Link:https://en.wikipedia.org/wiki/Val-d%27Oise

14. Source: Wikipedia
Title: Val Johnson incident
Link:https://en.wikipedia.org/wiki/Val_Johnson_incident

15. Source: Wikipedia
Title: Liste de canulars d’ovnis
Link:https://fr.wikipedia.org/wiki/Liste_de_canulars_d%27ovnis

16. Source: Wikipedia
Title: Groupe d’études et d’informations sur les phénomènes aérospatiaux non identifiés
Link:https://fr.wikipedia.org/wiki/Groupe_d%27%C3%A9tudes_et_d%27informations_sur_les_ph%C3%A9nom%C3%A8nes_a%C3%A9rospatiaux_non_identifi%C3%A9s

17. Source: geipan.fr
Link:https://www.geipan.fr/en/recherche/cas/tab?field_agregation_index_value=&field_classification_des_cas_target_id%5B0%5D=12&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=&field_latitude_value%5Bmin%5D=&field_longitude_value%5Bmax%5D=&field_longitude_value%5Bmin%5D=&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_date&page=31%2C6&sort=desc

18. Source: geipan.fr
Link:https://www.geipan.fr/fr/recherche/cas/tab?customGetLattitude=49.42700809484137&customGetLongitude=-0.9608752280473711&customGetZoom=7&field_agregation_index_value=&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=51.49757451349519&field_latitude_value%5Bmin%5D=47.35644167618756&field_longitude_value%5Bmax%5D=2.2526257485151295&field_longitude_value%5Bmin%5D=-4.174376204609872&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_departement_textuel&page=25&sort=asc

19. Source: geipan.fr
Link:https://www.geipan.fr/en/recherche/cas/tab?field_agregation_index_value=c&field_is_new_value=All&field_is_revisited_value=All&field_type_de_cas_target_id=All&order=title&page=118&sort=desc

20. Source: geipan.fr
Link:https://www.geipan.fr/en/recherche/cas/tab?field_is_revisited_value=All&field_type_de_cas_target_id=All&order=field_date&page=83&sort=desc

21. Source: geipan.fr
Link:https://geipan.fr/fr/recherche/cas/tab?field_is_new_value=All&field_is_revisited_value=All&field_type_de_cas_target_id=116&order=title&page=136&select-category-export=nothing&sort=desc

22. Source: cnes.fr
Link:https://cnes.fr/projets/geipan

23. Source: ufologie.patrickgross.org
Link:https://ufologie.patrickgross.org/press/sudouest27nov1979.htm

24. Source: ufologie.patrickgross.org
Link:https://ufologie.patrickgross.org/press/sudouest29nov1979.htm

25. Source: ufologie.patrickgross.org
Link:https://ufologie.patrickgross.org/press/sudouest28nov1979.htm

26. Source: ufologie.patrickgross.org
Link:https://ufologie.patrickgross.org/press/sudouest6dec1979.htm

27. Source: youtube.com
Link:https://www.youtube.com/watch?v=hn2xTieploU

<summary>Source snippet</summary><p>UFO hoax fools several French media…</p>

28. Source: youtube.com
Title: UFO hoax fools several French media
Link:https://www.youtube.com/watch?v=t1KQQB2GDLU

<summary>Source snippet</summary><p>Geipan: France is also interested in UFOs…</p>

29. Source: youtube.com
Title: Geipan: France is also interested in UFOs
Link:https://www.youtube.com/watch?v=OLXDikL331Y

30. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/cas/2010-01-02498

31. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/cas/2012-06-08256

32. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/cas/1979-07-01863

33. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/cas/2009-06-02327

34. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/fr/cas/2010-09-02673

35. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/en/node/56151

36. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/fr/cas/2013-09-08567?field_date_valu_valu=04-23&field_is_revisited_value=All&field_type_de_cas_target_id=All&order=field_departement_textuel&page=150%2C0&sort=asc

37. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/fr/cas/2013-10-08586?order=field_departement_textuel&page=150&sort=asc

38. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/recherche/cas?field_agregation_index_value=&field_classification_des_cas_target_id%5B13%5D=13&field_classification_des_cas_target_id%5B14%5D=14&field_classification_des_cas_target_id%5B15%5D=15&field_classification_des_cas_target_id%5B16%5D=16&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=&field_latitude_value%5Bmin%5D=&field_longitude_value%5Bmax%5D=&field_longitude_value%5Bmin%5D=&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=title&page=15%2C37&select-category-export=nothing&sort=desc

39. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/en/recherche/cas/tab?field_agregation_index_value=orange&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=&field_latitude_value%5Bmin%5D=&field_longitude_value%5Bmax%5D=&field_longitude_value%5Bmin%5D=&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_departement_textuel&page=26%2C27&sort=asc

40. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/fr/recherche/cas/tab?field_is_revisited_value=All&field_type_de_cas_target_id=All&order=field_classification_des_cas&page=%2C327&sort=desc

41. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/recherche/cas/tab?customGetLattitude=49.98977423589942&customGetLongitude=3.5211181640625004&customGetZoom=8&field_agregation_index_value=&field_classification_des_cas_target_id=All&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=51.01375465718821&field_latitude_value%5Bmin%5D=48.96579381461063&field_longitude_value%5Bmax%5D=5.388793945312501&field_longitude_value%5Bmin%5D=1.6534423828125002&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=title&page=3%2C32&sort=desc

42. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/en/recherche/cas/tab?customGetLattitude=46.124763699209396&customGetLongitude=2.4169921874999996&customGetZoom=6&field_agregation_index_value=&field_classification_des_cas_target_id=All&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=50.52739681329302&field_latitude_value%5Bmin%5D=41.72213058512578&field_longitude_value%5Bmax%5D=9.8876953125&field_longitude_value%5Bmin%5D=-5.053710937500001&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_classification_des_cas&page=%2C7&sort=desc

43. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/sites/default/files/2025-03/TAVERNY%20%2895%29%2004.01.2010%20%5BT-Cgei%20Qt%20T%2CD%20S%2CA%5D%20questionnaire%20terre-R.pdf

44. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/recherche/cas/tab?field_agregation_index_value=&field_classification_des_cas_target_id%5B12%5D=12&field_classification_des_cas_target_id%5B13%5D=13&field_classification_des_cas_target_id%5B14%5D=14&field_classification_des_cas_target_id%5B15%5D=15&field_classification_des_cas_target_id%5B16%5D=16&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=1&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=&field_latitude_value%5Bmin%5D=&field_longitude_value%5Bmax%5D=&field_longitude_value%5Bmin%5D=&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_departement_textuel&page=11%2C7&select-category-export=nothing&sort=desc&video=on

45. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/recherche/cas/tab?customGetLattitude=49.98977423589942&customGetLongitude=3.5211181640625004&customGetZoom=8&field_agregation_index_value=&field_classification_des_cas_target_id=All&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=51.01375465718821&field_latitude_value%5Bmin%5D=48.96579381461063&field_longitude_value%5Bmax%5D=5.388793945312501&field_longitude_value%5Bmin%5D=1.6534423828125002&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=field_date_d_observation&page=5&sort=desc

46. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/recherche/cas/tab?customGetLattitude=46.94358292648825&customGetLongitude=4.4989013671875&customGetZoom=7&field_agregation_index_value=&field_classification_des_cas_target_id=All&field_date_d_observation_value%5Bmax%5D=&field_date_d_observation_value%5Bmin%5D=&field_date_value=&field_departement_target_id=&field_document_existe_ou_pas_value=All&field_is_new_value=All&field_is_revisited_value=All&field_latitude_value%5Bmax%5D=49.11702904077932&field_latitude_value%5Bmin%5D=44.77013681219717&field_longitude_value%5Bmax%5D=7.668457031250001&field_longitude_value%5Bmin%5D=1.329345703125&field_phenomene_target_id=&field_type_de_cas_target_id=All&order=title&page=8&sort=asc

47. Source: cnes-geipan.fr
Title: baisse cas d
Link:https://www.cnes-geipan.fr/en/actualites/baisse-cas-d

48. Source: cnes-geipan.fr
Title: GEIPA N / CNESNo information is available for this page
Link:https://www.cnes-geipan.fr/en/node/58792

49. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/

50. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/cas/1993-11-01335

51. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/en

52. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/fr/cas/1980-03-00751

53. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/sites/default/files/save_json_import_files/export_cas_pub_20251127093552.csv

54. Source: cnes-geipan.fr
Title: Compte rendu enquete171
Link:https://www.cnes-geipan.fr/sites/default/files/Compte%20rendu%20enquete171.pdf

55. Source: cnes-geipan.fr
Link:https://cnes-geipan.fr/sites/default/files/Compte%20rendu%20enquete6.pdf

56. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/sites/default/files/Compte%20rendu%20enquete9.pdf

57. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/sites/default/files/Compte%20rendu%20enquete365.pdf

58. Source: cnes-geipan.fr
Title: Compte rendu enquete413
Link:https://www.cnes-geipan.fr/sites/default/files/Compte%20rendu%20enquete413.pdf

59. Source: cnes-geipan.fr
Link:https://www.cnes-geipan.fr/sites/default/files/Etude_psycho_1981_2.pdf

60. Source: scribd.com
Link:https://www.scribd.com/document/29603548/GEPAN

61. Source: facebook.com
Link:https://www.facebook.com/groups/825663274173679/posts/2248431775230148/

62. Source: academieairespace.com
Link:https://academieairespace.com/event/geipan-studies-uaps-ufos/?lang=en

Additional References

63. Source: aumilitaire.com
Link:https://aumilitaire.com/communaute/topic/61850-dissuasion-dissoute-en-2011-la-base-a%C3%A9rienne-921-%C2%AB-fr%C3%A8res-mah%C3%A9-%C2%BB-a-%C3%A9t%C3%A9-r%C3%A9activ%C3%A9e-%C3%A0-taverny/

64. Source: instagram.com
Link:https://www.instagram.com/base_aerienne_921/?hl=en

65. Source: valonline.org.uk
Link:https://valonline.org.uk/contact/

66. Source: facebook.com
Link:https://www.facebook.com/ScienceetVieMag/posts/fr%C3%A9d%C3%A9ric-courtade-est-le-directeur-du-geipan-ce-groupe-rattach%C3%A9-au-cnes-enqu%C3%AAte-/872407098372462/

67. Source: archive.org
Link:https://archive.org/stream/vallee-jacques-revelations_202012/Vall%C3%A9e%20Jacques%20-%20Revelations_djvu.txt

68. Source: parisaeroport.fr
Link:https://www.parisaeroport.fr/en/passengers/transport-parking/taxi/cdg

69. Source: x.com
Link:https://x.com/Armee_de_lair/status/1831704201937760766

70. Source: academieairespace.com
Link:https://academieairespace.com/evenement/le-geipan-etudie-les-pans-ovnis/

71. Source: rome2rio.com
Link:https://www.rome2rio.com/s/Paris-Charles-de-Gaulle-Airport-CDG/Val-d-Oise

72. Source: nationalgeographic.fr
Link:https://www.nationalgeographic.fr/espace/france-qui-se-cache-derriere-le-geipan-le-bureau-des-ovnis-en-france-etrange-enquetes