- IRIS: Fault Motion Animations
 - Presents demonstrations of the four different types of fault motion. - Understanding Earthquakes: Elastic Rebound Animation
- Features a QuickTime movie demo explanation of a fault zone.
- Wikipedia: Geologic Fault
- Hyperlinked, in-depth description of discontinuities in the Earth's crust. Explains the differences between normal, strike-slip, and thrust faults.
- University of Wisconsin: Faults and Earthquakes
- Extensive article that asks, what causes earthquakes? Discusses fault structures, seismograph readings, and the Earth's interior.
- Faults and Fault Zones
- Photo gallery highlighting a number of different geologic fault features in nature including: normal faults, reverse or thrust faults, strike-slip faults, fault contacts, and fault gouges.
- Southern California Integrated GPS Network (SCIGN): Faults
- Details the different types of plate boundaries, with animated imagery and photos of the Sierra Madre Fault.
- Visual Glossary of Geologic Terms: Faults
- Details normal, reverse, and strike-slip faults. Provided by the U.S. Geological Survey.
- UC Berkeley Seismological Laboratory: What is a Fault?
- Definitions adapted from The Earth, by F. Press and R. Siever.
- Talk Origins: Thrust Faults
- Offers an explanation of the mechanics of motion along thrust faults, with photos and examples of the Lewis Thrust working beneath Chief Mountain in Glacier National Park.
- University of Leeds: Faults
- Describes faults and stress, thrusts, and soft-linked fault systems. Includes picture gallery.
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