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U.S. Geological Survey- Earthquake Hazards Program <br /> Unified Hazard Tool <br /> Please do not use this tool to obtain ground motion parameter values for the design <br /> code reference documents covered by the U.S. Seismic Design Maps web tools (e.g., <br /> the International Building Code and the ASCE 7 or 41 Standard). The values returned <br /> by the two applications are not identical. <br /> ^ Input <br /> Edition Spectral Period <br /> Conterminous U.S. 2014 (v4.0.x) Peak ground acceleration <br /> Latitude Time Horizon <br /> Decimal degrees Return period in years <br /> 39.65826 475 <br /> Longitude <br /> Decimal degrees,negative values for western long... <br /> -106.93782 <br /> Site Class <br /> 760 m/s (B/C boundary) <br />