Ground Motion Models
Ground motion models (GMMs) forecast the range of ground motions that might occur conditioned on the occurrence of various earthquakes. Internally, every earthquake in a Forecast is parameterized as a GMM_Source, for which ground motions can be calculated. The javadocs (TODO link) provide the relevant implementation details.
One convenient way to access the models outside this platform is via Matlab. A sample script contains all the necessary instruction to get started.
Like source models, the corresponding ground motion models are described in a simple gmm.xml file. frmat are that are to be paired with various source models in hazard calculations a
U.S. Geological Survey – National Seismic Hazard Mapping Project (NSHMP)