The study involved digging a trench 15 meters long and up to 3 meters deep into the San Gabriel mountains. Evidence for Shared Earthquakes Between San Andreas and San Jacinto Faults Evidence for ...

The continuing movement of the San Andreas fault is always something ... the Waterman Canyon fault, the San Jacinto fault, the Santa Ana fault, the Cleghorn fault, and the Tunnel Ridge fault.

A cartoon showing how anomalous earthquakes near the San Andreas and San Jacinto faults in southern California work in regions deep below the Earth's surface. A UMass Amherst analysis shows this ...