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. 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.
In 2017, 65% of the cantons had produced the maps of seismic subsoil classes and seismic microzoning studies. Such documents are not currently available in the cantons of Appenzell Innerhoden, Bern, St Gallen, Schaffhausen, Schwyz, Thurgau and Zurich. A positive trend can be observed since 2004. The aim is to ensure that all cantons have access to local information about seismic hazard.
- 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 finances the compilation of maps of the seismic subsoil classes and centralises the data using a web application