An active fault is a fault that is likely to become the source of another earthquake sometime in the future. Faults are active if there has been movement seen or evidence of seismic activity during the last 10,000 years. Active faulting is considered to be a geologic hazard. It is related to earthquakes as a cause.
- "Active fault". Earthquake Glossary. USGS Earthquake Hazards Program. 2009. Retrieved 2011-09-17.