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: It covers Switzerland and surrounding regions (43–51°N and 3–13°E), merging data from 15 separate national and international catalogues.

: The project reassessed over 600 historical events, identifying 177 that caused significant damage (Intensity VI or higher) and removing roughly 260 "fake" or duplicate entries caused by historical recording errors. Download ECOS pdf

: It combines historical macroseismic reports (dating back to 250 AD) with modern instrumental recordings that have been tracked since 1975. How to Access and Download : It covers Switzerland and surrounding regions (43–51°N

: For up-to-the-minute data beyond the "frozen" 2009 catalogue, you can use the SED Event Portal, which allows you to query historical and modern events via a web browser. How to Access and Download : For up-to-the-minute

: For year-specific analysis (e.g., the 2002 or 2019/2020 periods), the SED publishes annual summaries available on the ETH Zurich Research Collection .

The , maintained by the Swiss Seismological Service (SED) , is the authoritative dataset for seismic hazard assessment in the region. The most common downloadable version is ECOS-09 (released in 2011), which provides a comprehensive record of seismic activity from 250 AD through 2008. Key Features of the ECOS PDF & Dataset

The SED provides different ways to access this data depending on your needs: