Database for design-compatible waveforms

In the frame of the project Database for design-compatible waveforms, we determine the magnitude-distance scenarios most relevant for the five seismic zones (Z1a, Z1b, Z2, Z3a and Z3b) defined in the Swiss building code SIA261 (2020) through disaggregating of the seismic hazard for return periods of 475 and 975 years. We inspect available worldwide databases of waveforms and related metadata, and define standards linked to the quality of three-component recordings (compatibility to GMPE, adequate frequency content, absence of non-physical drift in velocity and displacement) and quality of metadata (reliability of magnitude, distance, site condition information, free-field recording, etc.). Finally, following rules in Eurocode8, we select and scale waveforms for the different soil classes defined in the Swiss building code and each seismic zone.