In the heart of California, the San Andreas Fault lies like a ticking time bomb, silently building pressure for over a century. Stretching more than 1,200 kilometers, this massive fault marks the ...

A swarm of moderately sized earthquakes has hit California near the San Andreas fault, increasing the likelihood that a bigger earthquake could strike within the next seven days.

The San Andreas Fault is a continental right-lateral strike‑slip transform fault stretching roughly 1,200 km in California.

California earthquakes are a geologic inevitability. The state straddles the North American and Pacific tectonic plates and is crisscrossed by the San Andreas and other active fault systems.

A new study suggests that last year’s Ridgecrest earthquakes increased the chance of a large earthquake on California’s San Andreas fault. The study, published in the Bulletin of the ...

Southern California’s section of the San Andreas fault is “locked, loaded and ready to roll,” a leading earthquake scientist said Wednesday at the National Earthquake Conference in Long Beach.

Scientists have warned that last year’s Ridgecrest quakes in Southern California have increased the risk of a major San Andreas fault earthquake. .

Geologists found that prehistoric Lake Cahuilla in California has triggered major earthquakes along the San Andreas fault. The lake is now gone, potentially delaying, but not stopping, another ...

The southern San Andreas fault in California is in a seismic drought, going more than 300 years without a major earthquake.

A swarm of small quakes near the San Andreas fault spurred officials in California to issue an earthquake alert for residents of Southern California. Based on the swarm activity, the risk of an ...

The last “big one”-level moments in California’s recorded earthquake history were the 1857 quake in the central third of the San Andreas Fault and the 1906 earthquake in the northern third.