Enlarged microscope photo of sedimentary rock that was structurally altered during an earthquake. The slip layer (green portion) was heated during fault movement. The actual field of view is only ...

The San Andreas Fault, this scar visible from space, stretches across California for over 1,200 kilometers (about 745 miles). It separates two tectonic plates sliding against each other, shaping the ...

They are two of the West Coast’s most destructive generators of huge earthquakes: The San Andreas fault in California and the Cascadia subduction zone offshore of California’s North Coast, Oregon, ...

Last Monday, April 14, an earthquake caught many people’s attention in Southern California. It was centered near the town of Julian about 35 miles inland from San Diego and triggered the USGS ...

This is read by an automated voice. Please report any issues or inconsistencies here. New research suggests the San Andreas fault and the Cascadia subduction zone could produce devastating ...