How are the estimated ground motion intensities calculated?
The ground motion intensities are calculated using the USGS ShakeMap system. A ShakeMap is a representation of ground shaking produced by an earthquake. The ground shaking intensity at sites throughout the region depends on the earthquake’s magnitude, the geometry and size of the ruptured fault, distance from the earthquake fault, the rock and soil conditions at sites, and variations in the propagation of seismic waves from the earthquake due to complexities in the structure of the Earth’s crust.
