An interactive map of significant earthquakes and faults in southern California. Click on each earthquake icon, and see a brief overview of each event.

This outstanding multimedia website follows the San Andreas fault system up the California coast from San Diego to just north of San Francisco on the coast.

A map of a portion of the San Bernardino Mountains near Big Bear Lake in 1911. The map is based on the USGS San Gorgonio quadrangle, with contour intervals of 500 feet. "Bear Valley and the adjacent country exhibit the subdued relief...