It turns out that continental breakups are just as messy as human ones, with the events leaving fragments scattered far from home ...

What appears to be such a pleasant meeting-place of the well-known rifts, in the Northern part of California, is proving to ...

A 4.9-magnitude earthquake and several aftershocks rattled Southern California on Monday night, according to the United States Geological Survey. The first and largest quake happened approximately ...

Focusing on an area off the coast of Crescent City, California, the researchers used autonomous and remotely operated vehicles to get detailed views of the slope and sediment deposits. They also used ...

A hidden shard of ancient crust has been detected where California’s San Andreas system collides with the Cascadia subduction zone, reshaping how I understand the tectonic engine of the West Coast.

Drop. Cover. Hold on. That’s the three-part jingle every Californian learns to stay safe in earthquake country. Scientists forecast a more than 99% chance that earthquakes of 6.7 magnitude or larger ...

An earthquake swarm hit the San Francisco Bay Area on Sunday morning. The cluster of up to eight quakes, ranging from 2.5 to 3.8 on the Richter scale, first occurred from 9:38am to 9:41am around ...

The Carrizo Plain in eastern San Luis Obispo County contains the most strikingly graphic portion of the San Andreas Fault. Sediment cores recovered from the Pacific seafloor suggest that megathrust ...

One of the most dangerous faults in the United States, the Cascadia Subduction Zone, may be able to trigger an earthquake on the San Andreas Fault, a new study says. But some scientists want more ...

If the Cascadia subduction zone and the San Andreas fault can act in concert, then seismic models must consider the possibility of coupled behavior. That could mean a higher short-term risk of back-to ...