Science: evidence is intelligence - The San Andreas fault, which runs roughly north-south, is slipping, causing Los Angeles on the Pacific tectonic plate to move towards San Francisco, stuck on the North
Transform Plate Boundaries - Geology (U.S. National Park Service)
1906 San Francisco Earthquake
The San Andreas fault -- what it is, why it matters, and what you should know about its earthquakes
Where earthquakes occur in the San Francisco Bay Area
San Andreas Fault - Wikipedia
Earth Hazards of the Western United States — Earth@Home
San Andreas Fault | Plate boundary, Type, Location, Map, & Facts | Britannica
Our Ever-Changing World: The Theory of Plate Tectonics | Upper Moreland, PA Patch