Local information about seismic hazard
The intensity and duration of earthquake vibrations in a location depend to a great extent on the characteristics of the local subsoil. To determine the local seismic hazard, the cantons produce maps of the subsoil classes and spectral microzoning, on their own initiative and with the technical support of the Confederation. These documents are used by construction experts, for example, to facilitate the design of more earthquake-proof buildings and to test the earthquake-resistance of existing buildings.
medium
unsatisfactory
The aim is to ensure that all cantons have access to local information about seismic hazard. To date, 70% of the cantons have produced maps of seismic subsoil classes and seismic microzoning studies. In the cantons AI, BE, SG, SZ, TG, ZG, UR and ZH such bases do not exist. For this reason, the status is assessed as medium. A positive development can be observed from 2004 to 2012. From 2012 onwards, the development is unsatisfactory, as only new canton has become active since then. Furthermore, there is a need to update outdated existing maps of subsoil classes in 13 cantons.
- Related indicators
- Earthquake-specific building regulations for private buildings
Compared to other European countries, the production of maps with seismic subsoil classes is very advanced in Switzerland.
The data are collected by means of a survey of cantonal projects. The FOEN centralises the data using a web application
| Targeted trend | Initial value | Final value | Variation in % | Observed trend | Assessment |
|---|---|---|---|---|---|
| Growth | 2004 | 2022 | 800.00% | Growth | positive* |
*A positive development can be observed between 2004 and 2012. Since then, however, only one new canton has become active. For this reason, the development is rated as unsatisfactory.
Further information
