National Seismic Hazard Mapping Project  Project Description The
National Seismic Hazard mapping Project (NSHMP) is a project
developed by the United States Geological Survey (USGS)which
involves the development of hazard maps showing the likely risk
of seismic activity throughout the United States.  The map here
depict earthquake hazard by showing, by contour values, the
earthquake ground motions that have a common given probability
of being exceeded in 50 years.  The ground motions being
considered at a given location are those from all future
possible earthquake magnitudes at all possible distances from
that location. The ground motion coming from a particular
magnitude and distance is assigned an annual probability equal
to the annual probability of occurrence of the causative
magnitude and distance.  The method assumes a reasonable future
catalog of earthquakes, based upon historical earthquake
locations and geological information on the recurrence rate of
fault ruptures.  When all the possible earthquak