Animations of Fault Slip on the Anatolian Fault, Turkey

Fault Animations - Incorp. Research Institutes for Seismology (IRIS) - animations of three fault types

Faults - Univ. of Leeds

Faults & Earthquakes - Univ of Wisconsin - learn the basics with great diagrams and animations

National Quaternary Fault & Fold Database - information on faults and associated folds in the United States that are believed to be sources of M>6 earthquakes during the Quaternary (the past 1,600,000 years). Maps of these geologic structures are linked to detailed descriptions and references.

Photos of Faults and Fault Zone Features - Univ. of Oregon

The San Andreas Fault - online general interest publication

indicates a USGS product or USGS partner product