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Cogolin: geology and natural hazards

What public services say about the ground beneath the commune (population 12,301) 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

Cogolin at a glance

Seismic zone
2 of 5 (low)
Radon potential
Category 3 of 3 (significant potential)
Recognised natural disasters
16 since 1996
Underground cavities recorded
None
Ground movements recorded
1
Risk prevention plans
2

Hazards listed by the French State

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

  • Inondation: par une crue torrentielle ou à montée rapide de cours d’eau, par submersion marine
  • Mouvement de terrain: glissement de terrain, recul du trait de côte et de falaises
  • Séisme
  • Feu de forêt
  • Radon
  • Transport de marchandises dangereuses
  • Affaissement minier: effondrements localisés, tassements, glissements ou mouvements de pente

Recognised natural disasters

16 events recognised as a natural disaster by ministerial order since 1996.

  • Inondations et/ou coulées de boue: 13
  • Chocs mécaniques liés à l’action des vagues: 2
  • Sécheresse: 1

  1. Inondations et/ou coulées de boue

    Event from 18/05/2025 to 19/05/2025, order published in the Journal officiel on 28/05/2025.

  2. Inondations et/ou coulées de boue

    Event from 24/10/2024 to 25/10/2024, order published in the Journal officiel on 20/12/2024.

  3. Sécheresse

    Event from 31/03/2023 to 29/09/2023, order published in the Journal officiel on 02/12/2024.

  4. Inondations et/ou coulées de boue

    Event from 23/11/2019 to 24/11/2019, order published in the Journal officiel on 30/11/2019.

  5. Inondations et/ou coulées de boue

    Event from 25/11/2014 to 28/11/2014, order published in the Journal officiel on 04/12/2014.

  6. Inondations et/ou coulées de boue

    Event from 13/12/2012 to 15/12/2012, order published in the Journal officiel on 28/02/2013.

  7. Chocs mécaniques liés à l’action des vagues

    Event from 08/11/2011 to 09/11/2011, order published in the Journal officiel on 07/03/2012.

  8. Inondations et/ou coulées de boue

    Event from 04/11/2011 to 10/11/2011, order published in the Journal officiel on 19/11/2011.

  9. Inondations et/ou coulées de boue

    Event on 15/06/2010, order published in the Journal officiel on 17/09/2010.

  10. Inondations et/ou coulées de boue

    Event on 22/10/2009, order published in the Journal officiel on 13/12/2009.

  11. Inondations et/ou coulées de boue

    Event from 18/09/2009 to 19/09/2009, order published in the Journal officiel on 21/10/2009.

  12. Inondations et/ou coulées de boue

    Event from 15/12/2008 to 16/12/2008, order published in the Journal officiel on 01/07/2009.

  13. Chocs mécaniques liés à l’action des vagues

    Event from 14/12/2008 to 16/12/2008, order published in the Journal officiel on 01/07/2009.

  14. Inondations et/ou coulées de boue

    Event on 10/12/2008, order published in the Journal officiel on 01/07/2009.

  15. Inondations et/ou coulées de boue

    Event on 14/07/2002, order published in the Journal officiel on 09/11/2002.

  16. Inondations et/ou coulées de boue

    Event from 21/09/1996 to 22/09/1996, order published in the Journal officiel on 05/02/1997.

Earthquakes and radon

Seismic zone

Zone 2 of 5: low. This regulatory zoning, in force since 2011, sets the rules for earthquake-resistant construction.

Radon potential

Category 3 of 3: significant potential. At least part of the commune has higher-than-average 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…).

1 ground movement recorded (landslides, rockfalls, collapses, mudflows…).

See cavities and ground movements on the map

Risk prevention plans

  • PPRN-I - Cogolin 2005

    Natural risk prevention plan.

  • PPRN-MVT - Cogolin 1997

    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.