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Hauts-de-Seine (92)

Antony: geology and natural hazards

What public services say about the ground beneath the commune (population 64,263) and the hazards it faces: natural disasters, earthquakes, radon, cavities, clays, groundwater and rocks.

Hazard names and other data are quoted as their producers publish them, in French.

Explore the commune on the map

Hazards listed by the French State

Natural and technological hazards to which the commune is exposed, according to the national GASPAR database.

  • Mouvement de terrain: affaissements et effondrements d’origine anthropique (anciennes carrières souterraines, hors mines), tassements différentiels
  • Phénomène lié à l’atmosphère: tempête et grains (vent)
  • Transport de marchandises dangereuses

Recognised natural disasters

22 events recognised as a natural disaster by ministerial order since 1988.

  • Sécheresse: 12
  • Inondations et/ou coulées de boue: 9
  • Mouvement de terrain: 2

  1. Sécheresse

    Event from 01/07/2020 to 30/09/2020, order published in the Journal officiel on 07/05/2021.

  2. Sécheresse

    Event from 01/07/2018 to 31/12/2018, order published in the Journal officiel on 17/07/2019.

  3. Inondations et/ou coulées de boue

    Event on 11/06/2018, order published in the Journal officiel on 20/10/2018.

  4. Inondations et/ou coulées de boue

    Event on 07/08/2008, order published in the Journal officiel on 31/12/2008.

  5. Sécheresse

    Event from 01/01/2006 to 31/03/2006, order published in the Journal officiel on 23/04/2008.

  6. Sécheresse

    Event from 01/07/2005 to 30/09/2005, order published in the Journal officiel on 22/02/2008.

  7. Sécheresse

    Event from 01/01/2005 to 31/03/2005, order published in the Journal officiel on 22/02/2008.

  8. Sécheresse

    Event from 01/07/2003 to 30/09/2003, order published in the Journal officiel on 26/08/2004.

  9. Mouvement de terrain

    Event from 01/07/2003 to 30/09/2003, order published in the Journal officiel on 25/10/2007.

  10. Inondations et/ou coulées de boue

    Event on 07/07/2001, order published in the Journal officiel on 27/10/2001.

  11. Inondations et/ou coulées de boue

    Event on 23/07/2000, order published in the Journal officiel on 17/12/2000.

  12. Mouvement de terrain, Inondations et/ou coulées de boue

    Event from 25/12/1999 to 29/12/1999, order published in the Journal officiel on 30/12/1999.

  13. Sécheresse

    Event from 01/04/1998 to 30/09/1998, order published in the Journal officiel on 05/02/1999.

  14. Inondations et/ou coulées de boue

    Event from 05/08/1997 to 06/08/1997, order published in the Journal officiel on 30/12/1997.

  15. Sécheresse

    Event from 01/01/1997 to 31/03/1998, order published in the Journal officiel on 29/07/1998.

  16. Inondations et/ou coulées de boue

    Event on 19/07/1994, order published in the Journal officiel on 17/12/1994.

  17. Inondations et/ou coulées de boue

    Event on 18/07/1994, order published in the Journal officiel on 17/12/1994.

  18. Sécheresse

    Event from 01/07/1993 to 31/12/1996, order published in the Journal officiel on 19/07/1997.

  19. Sécheresse

    Event from 01/12/1992 to 30/06/1993, order published in the Journal officiel on 09/09/1995.

  20. Sécheresse

    Event from 01/10/1990 to 30/11/1992, order published in the Journal officiel on 03/09/1993.

  21. Sécheresse

    Event from 01/05/1989 to 30/09/1990, order published in the Journal officiel on 19/07/1991.

  22. Inondations et/ou coulées de boue

    Event on 23/07/1988, order published in the Journal officiel on 14/01/1989.

Earthquakes and radon

Seismic zone

Zone 1 of 5: very low. This regulatory zoning, in force since 2011, sets the rules for earthquake-resistant construction.

Radon potential

Category 1 of 3: low potential. The geological formations have the lowest uranium content. Radon is a naturally occurring radioactive gas that can build up in poorly ventilated rooms.

Beneath the town hall

What BRGM maps say at the town hall. They describe that single point: elsewhere in the commune, the ground may be quite different.

  • Shrink-swell clays

  • Rising groundwater

  • Underground cavities

  • Ground movements

  • Earthquakes

  • Nature of the ground

Cavities and ground movements

Recorded across the whole commune by BRGM, in its national databases of underground cavities and ground movements.

No underground cavity recorded (quarries, cellars, military works, natural cavities…).

No ground movement recorded (landslides, rockfalls, collapses, mudflows…).

See cavities and ground movements on the map

Risk prevention plans

  • R111.3 - Antony

    Natural risk prevention plan.

The zoning and regulations of each plan, which may prohibit or restrict building, can be consulted at the town hall and on Géorisques.

Nearby communes

Sources and limitations

Listed hazards, natural disasters, seismic zoning, radon potential, cavities, ground movements and prevention plans: Géorisques, published by the French ministry for the ecological transition, under Licence Ouverte Etalab 2.0, data accessed on 02/11/2026. Summary beneath the town hall: BRGM map services, queried when the page is displayed. List of communes and populations: API Découpage administratif (geo.api.gouv.fr), d’après le code officiel géographique de l’Insee, version of 30/10/2026.

This information reflects the state of knowledge at the scale of the commune or of a single point. It replaces neither a soil survey nor the official risk statement (état des risques) required for a sale or a rental, which is drawn up on the official French government service.