A USGS Earthquake Science Center Mobile Laser Scanning truck scans the surface rupture near the zone of maximum surface displacement of the magnitude 7.1 earthquake that struck the Ridgecrest area In July, Southern California was shaken by the largest ...

NORFOLK, Va. — Fault lines are fractures or breaks in the Earth's crust where tectonic plates move past each other, often resulting in earthquakes. These geological features are classified into three main types: normal, reverse, and strike-slip faults.

As observed in Lesson 3, at low pressures and temperatures rock is a brittle material that will fail by fracture if the stresses become sufficiently large. When a lateral displacement takes place on a fracture, the break is referred to as a fault.

Faults along Los Angeles’ power grid surged in the same locations where three of this week’s massive wildfires are raging, a company that monitors electrical activity said. Whisker Labs recorded sharp increases in faults in the hours prior to the Eaton ...

Two of Southern California’s most active faults could rupture together in a magnitude-7.5 earthquake, according to a new study, raising a grim seismic scenario for communities east of Los Angeles. The study established how a major earthquake could begin ...