Indicator natural hazards

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.

Assessment of the state
medium medium
Assessment of the trend
positive positive
Cantons with maps of the subsoil classes and/or spectral microzoning studies 2017: 17 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2016: 17 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2015: 17 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2014: 17 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2012: 17 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2011: 16 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2010: 15 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2009: 13 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2008: 11 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2004: 2 Cantons with maps of the subsoil classes and/or spectral microzoning studies 2000: 0

Data for the graph: Excel
Source: FOEN
Comment

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.

International comparison

Compared to other European countries, the production of maps with seismic subsoil classes is very advanced in Switzerland.

Method

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

 
Last updated on: 04.07.2018

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