Worldwide Seismic Design Tool (Beta)

The USGS Worldwide Seismic Design Tool (Beta) has been discontinued, due primarily to insufficient resources for adequately updating the tool with recent information from, for example, the Global Earthquake Model (GEM). As formerly stated within the tool, the SS and S1 values provided were merely an informal and incomplete collection derived from existing studies, but those values had become considerably outdated. In an attempt to continue supporting the seismic design community, the developers of the tool are pursuing resources for a collaboration with GEM and/or others. For any correspondence regarding this discontinued tool, please email