Gonfaron: geology and natural hazards

Seismic zone

2 of 5 (low)

Radon potential

Category 3 of 3 (significant potential)

Recognised natural disasters

15 since 2002

Underground cavities recorded

5

Ground movements recorded

1

Risk prevention plans

None

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
• Mouvement de terrain: eboulement ou chutes de pierres et de blocs, glissement de terrain, tassements différentiels
• Séisme
• Feu de forêt
• Transport de marchandises dangereuses

15 events recognised as a natural disaster by ministerial order since 2002.

• Inondations et/ou coulées de boue: 12
• Sécheresse: 3

1. Inondations et/ou coulées de boue

   Event from 20/12/2025 to 21/12/2025, order published in the Journal officiel on 26/02/2026.

2. 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.

3. Inondations et/ou coulées de boue

   Event from 09/03/2024 to 10/03/2024, order published in the Journal officiel on 01/06/2024.

4. Sécheresse

   Event from 01/04/2023 to 30/06/2023, order published in the Journal officiel on 02/07/2024.

5. Sécheresse

   Event from 01/04/2022 to 30/09/2022, order published in the Journal officiel on 03/05/2023.

6. Inondations et/ou coulées de boue

   Event on 01/12/2019, order published in the Journal officiel on 13/02/2020.

7. 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.

8. Inondations et/ou coulées de boue

   Event from 22/10/2019 to 23/10/2019, order published in the Journal officiel on 31/10/2019.

9. Sécheresse

   Event from 01/07/2017 to 30/09/2017, order published in the Journal officiel on 20/10/2018.

10. Inondations et/ou coulées de boue

    Event from 24/11/2014 to 25/11/2014, order published in the Journal officiel on 19/02/2015.

11. Inondations et/ou coulées de boue

    Event from 18/01/2014 to 20/01/2014, order published in the Journal officiel on 01/03/2014.

12. 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.

13. Inondations et/ou coulées de boue

    Event from 15/06/2010 to 16/06/2010, order published in the Journal officiel on 22/06/2010.

14. Inondations et/ou coulées de boue

    Event from 14/12/2008 to 16/12/2008, order published in the Journal officiel on 22/04/2009.

15. Inondations et/ou coulées de boue

    Event from 10/10/2002 to 11/10/2002, order published in the Journal officiel on 07/02/2003.

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.

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

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

5 underground cavities recorded (quarries, cellars, military works, natural cavities…).

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

See cavities and ground movements on the map

No risk prevention plan is listed for the commune.

• Pignans (83)
• Les Mayons (83)
• Flassans-sur-Issole (83)
• Carnoules (83)
• Le Luc (83)
• Le Cannet-des-Maures (83)
• Collobrières (83)
• Besse-sur-Issole (83)

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.