Ground Motion Interpolator (2008)
Site Condition (VS30):
(180-1050 m/sec)
Return Period:
Spectral Acceleration:
Information and Disclaimer

Ground Motion values provided by this tool are based on a grid (0.05 degree spacing) of precalculated values. The tool employs bilinear interpolation on the grid to obtain estimated values between grid points.

DISCLAIMER: Interpolated ground motion may not equal values calculated for a specific site, therefore these values are not intended for design or analysis.

The data source is the 2008 National Seismic Hazard Model (NSHM) for the Conterminous U.S. Updated gridded hazard map data for the U.S. are available at the U.S.G.S. National Seismic Hazard Data web page.

The multi-color background map is the Probabilistic Seismic Hazards Map for Peak Ground Acceleration (2% in 50 years), with soil conditions incorporated. More information about the map can be found on Map Sheet 48: Earthquake Shaking Potential for California and CGS's Seismic Shaking Hazards Assessment page.

Comprehensive information about probabilistic earthquake hazards can be found at the U.S.G.S. National Seismic Hazard Maps web page.

Enter latitude/longitude coordinates
or click on the map, then
press the Submit button.