The California Geological Survey published maps of “Earthquake Shaking Potential for California” in 1999 and has revised the maps following each update of the National Seismic Hazard Maps (NSHM). Similar to the NSHMs, the Earthquake Shaking Potential Maps for California depict expected intermediate period (1s or 1hz) ground motions with 2% exceedance probability in 50 years. Unlike the NSHMs, Earthquake Shaking Potential Map for California incorporates anticipated amplification of ground motions by local soil conditions. The current update of the Earthquake Shaking Potential Map for California (California Geological Survey Map Sheet 48) is based on the 2014 NSHMs developed by the United States Geological Survey (Petersen et al., 2014), a new map of the average shear wave velocity in the upper 30m of the earth’s surface for California (Wills et al., 2015), and a new semi-empirical nonlinear site amplification model (Seyhan and Stewart, 2014).

This layer depicts areas within WA State Parks where metal detection activity is allowed. Features were compiled from various previous metal detection area layers. Features were reviewed to ensure they match the metal detection areas as depicted on the metal detection area maps posted on the WA State Parks website at https://parks.state.wa.us/127/Metal-detecting as of January 13, 2018. Local park management considerations may impact areas currently available for metal detection activity. For further information, including registration forms, see https://parks.state.wa.us/127/Metal-detecting. Reviewed March 2022.To download this and other data from Washington State Parks, go to https://geo.wa.gov/datasets?q=wsprcand search for "wsprc" (Washington State Parks and Recreation Commission).

Points in the general location of recreational activity opportunities within state parks.Attribute Definitions: PARK_ID - Name of the State Park or State Parks property the point is in.NAME - Category of recreation represented by the point.Notes - Further specification of what the point represents, or miscellaneous notes about the activity.Long - Longitude of the point.Lat - Latitude of the point. To download this and other data from Washington State Parks, go to geo.wa.gov and search for "wsprc" (Washington State Parks and Recreation Commission).

Data on occupational health & safety, key nutrition targets (global and by country) and community investment.

The U.S. landscape has undergone substantial changes since Europeans first arrived. Many land use changes are attributable to human activity. Historical data concerning these changes are frequently limited and often difficult to develop. Modeling historical land use changes may be necessary. We develop annual population series from first European settlement to 1999 for all 50 states and Washington D.C. for use in modeling land use trends. Extensive research went into developing the historical data. Linear interpolation was used to complete the series after critically evaluating the appropriateness of linear interpolation versus exponential interpolation.