A 3.5-magnitude earthquake near Concord in the East Bay shook the area on Sunday, two days after a quake of similar magnitude ...

The San Andreas Fault is a continental transform fault that extends roughly 1,200 kilometers (750 mi) through California. It forms the tectonic boundary between the Pacific Plate and the North ...

Therefore, while the San Andreas fault may generate more powerful earthquakes—up to magnitudes of around 8.0 or even higher—the location of the Puente Hills thrust fault makes it a major hazard.

This sudden jerk creates an earthquake. The San Andreas Fault is undoubtedly the most famous transform boundary in the world. To the west of the fault is the Pacific plate, which is moving northwest.