Skip to main content
U.S. flag

An official website of the United States government

Interactive U.S. Fault Map

September 27, 2022
Go to Interactive Map

Go to Quaternary Faults webpage. 

color relief map of the US West Coast with faults of different colors
Sources/Usage: Public Domain. Visit Media to see details.
Map showing Quaternary faults in the western U.S. and Pacific Ocean. Note that most faults that can affect residents are either onshore or just offshore. The various colors and line types indicate different ages of the most recent earthquakes on the fault and how well the location of the fault is constrained. For more details, see Quaternary Faults.Map showing Quaternary faults in the western U.S. and Pacific Ocean. Note that most faults that can affect residents are either onshore or just offshore. The various colors and line types indicate different ages of the most recent earthquakes on the fault and how well the location of the fault is constrained. For more details, see Quaternary Faults.