In July, 2014, the U.S. Geologic Survey (USGS) announced that it has updated its national seismic hazard maps for the continental United States. This mapping is a graphic representation of the best and most current understanding of where future earthquakes will occur, how often they will occur, and how hard the ground will likely shake as a result (known as Peak Ground Acceleration, or PGA). According to the USGS, the new hazard maps are to be made available in late September, 2014.