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: A detailed PDF explaining the methodology and catalogue format can be found on ResearchGate or directly via the SED Appendix L .

: 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

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

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

: Unlike older records, ECOS provides a uniform estimate of moment magnitude ( MWcap M sub cap W ) for all events, allowing for consistent hazard modeling.