Seismic hazard describes the potential for earthquake-related ground motion or effects at a location.
Definition
Seismic hazard information describes potential earthquake-related ground motion or effects associated with a location. Engineering teams interpret it alongside site conditions, building characteristics, and the governing code to establish project design criteria. The information used and the level of evaluation depend on the project and applicable requirements; some assignments may need site-specific geotechnical or engineering input. Firms should identify who obtains and interprets hazard data and how the results will be documented. Hazard is not a prediction of when an earthquake will occur, nor does it by itself say whether a particular structure will be damaged. Site response and structural design also influence project decisions. For owners, early identification of hazard-related scope can help coordinate geotechnical and structural work, required inputs, and schedule dependencies. Classification and design requirements should be confirmed for the project’s jurisdiction and criteria.
How owners use it
- Identify hazard information and site data needed to establish structural design criteria.
- Coordinate geotechnical input with the structural team before assumptions are fixed in the design basis.
- Example: A project team tracks 1 hazard-data task + 1 site-class task + 1 criteria review = 3 input tasks.
- Document the source and assumptions for hazard inputs so later design reviews can follow the basis.
