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nshmp-haz-ws is a web-service wrapper around the nshmp-haz probabilistic seismic hazard analysis (PSHA) platform. It is developed and maintained by the National Seismic Hazard Mapping Project (NSHMP) within the U.S. Geological Survey's (USGS) earthquake hazards program (EHP).

nshmp-haz-ws services supply data to the USGS NSHMP Unified Hazard Tool (UHT). While basic documentation on the use of the tool is available here, this documentation describes the details of the underlying data and calculations, including descriptions or examples of:

• How to run the hazard and deaggregation services.
• The different editions of the hazard models the NSHMP produces.
• Distinguishing features of different versions of each edition.
• Static vs. dynamic data.
• Common use cases.