The real risk, zone by zone
Since 2011, France has applied a regulatory seismic zoning with 5 levels, which determines applicable earthquake-resistant construction standards:
| Zone | Seismicity level | Example territories |
|---|---|---|
| 1 | Very low | A large part of mainland France. |
| 2 | Low | Scattered areas of mainland France. |
| 3 | Moderate | Scattered areas of mainland France. |
| 4 | Medium | Alps, Pyrenees, Rhine valley — the most active areas of mainland France. |
| 5 | High | Guadeloupe and Martinique, on the Antilles arc, an active subduction zone. |
This zoning isn't a matter of feeling: it's based on seismic history and determines different construction rules by zone. To find your municipality's zone, check Géorisques.
Before: preparing your home
- Find out your zone's risk level.
- Prepare your 72h emergency kit.
- Get a vulnerability assessment of your building if you're in zone 4 or 5.
- Secure heavy furniture and appliances that could tip over.
During: the three reflexes
Shelter
Near a load-bearing wall or under sturdy furniture, from the first tremor.
Cover yourself
Protect your head and torso, stay away from windows to avoid broken glass.
Stay away from anything that could collapse
If you're on the ground floor or outside, reach a clear space. In a car, pull over without getting out.
Once the shaking stops, leave damaged buildings only by the stairs, and stay alert: several aftershocks are possible.
After: what matters
- Never use the lift to leave a building.
- Assess damage and obvious dangers before moving around.
- Cut off water, gas and electricity if not already done.
- In case of a gas leak, open doors and windows, leave the building, move away to call for help, and don't smoke or light any flame.
- If trapped, make noise to signal your presence.
Mistakes to avoid
- Rushing outside during the tremor. The risk of falling objects or façade collapse is real: better to shelter in place.
- Taking the lift to evacuate a building after an earthquake.
- Turning gas or electricity back on without checking if you suspect a leak.
- Underestimating the risk in zone 4 (Alps, Pyrenees, Rhine valley) on the assumption that mainland France "isn't affected" by earthquakes.
An earthquake alert, wherever you are
LASTLINE can help you:
- receive an earthquake alert detected near your location;
- keep your practical guides accessible, even without network, to review the right reflexes.
These alerts come from an international seismic monitoring service with a given detection threshold: a low-magnitude earthquake, even felt locally, may not trigger an alert.
Receive earthquake alertsFrequently asked questions
What should you do during an earthquake?
Shelter near a load-bearing wall or under sturdy furniture, cover your head and torso, stay away from windows and anything that could collapse. If you're in a car, pull over without getting out.
Can you take the lift after an earthquake?
No. Leave a damaged building only by the stairs, never by lift, which can get stuck in a power outage or structural damage.
Is all of France exposed to seismic risk?
No, unevenly. The regulatory zoning distinguishes 5 zones, from very low (zone 1) to high seismicity (zone 5, which covers the Antilles). In mainland France, the Alps, the Pyrenees and the Rhine valley concentrate most seismic activity.
Sources
- Civil Protection (Ministry of the Interior), Earthquake.
- Ministry for Ecological Transition, Earthquakes in France.