Hazards

Maps of earthquake shaking hazards provide information essential to creating and updating the seismic design provisions of building codes and insurance rates used in the United States. Periodic revisions of these maps incorporate the results of new research.

Workshops are conducted periodically for input into the hazards products.

Learn About Earthquake Hazards

A Google Earth™ image showing the principal zone of faulting (in red) near the town of Healdsburg.

What are the USGS National Seismic Hazard Maps and how are they used? What do I need to know about earthquake hazards? What does "earthquake hazard" mean?

Seismic Hazard Model, Maps, and Site-Specific Data

Seismicity of Hawaii from 2021 Hawaii National Seismic Hazard Map

U.S. Seismic Hazard Model, hazard tools, and other products.

Faults in the U.S.

Interactive Fault Map

Interactive fault map and information on known or suspected active faults and folds in the United States. Also, generalized fault data used in the hazard model.

Hazard map from the 2023 50-<a href=state update of the National Seismic Hazard Model Project" width="600" height="294" />

Learn About Earthquake Hazards
What do I need to know about earthquake hazards? What does "earthquake hazard" mean? What are hazard maps?

Faults
Interactive fault map and comprehensive geologically based information on known or suspected active faults and folds in the United States. Also, generalized fault data used in the hazard model.

Design Ground Motions
Ground motion parameter values for the design of buildings, bridges, and other structures.

Earthquake Scenarios
Earthquake scenarios describe the expected ground motions and effects of specific hypothetical large earthquakes.

Workshops
Workshops are announced periodically for input into the hazards products.