A preliminary magnitude 3.2 earthquake shook the Concord area shortly after noon on Friday, according to the United States ...

The quake ruptured on a small section of a fault associated with the Puente Hills thrust fault system, which has long been cited as a major seismic hazard for Southern California because it runs ...

Seismologist Lucy Jones, a Caltech research associate, said the earthquake, centered in the Eastside neighborhood of El Sereno, occurred on the Puente Hills thrust fault system. It’s the same ...

The 4.4 magnitude earthquake that was felt in many Southern California cities Monday fell on the Puente Hills Thrust Fault System, which is potentially the most destructive in the region.

The Monday quake and recent smaller earthquakes in the vicinity have placed renewed attention on the Puente Hills fault and the dangers it could bring. The Puente Hills thrust fault is a broad ...

The Puente Hills thrust fault runs beneath downtown Los Angeles and Orange County – two highly populated areas. The 10-mile deep fault angles like a ramp and gets closest to the surface near the ...

While neither caused any major damage, experts have warned that Monday's quake may have been associated with the Puente Hills thrust fault, which could one day cause a huge earthquake in Los Angeles.

Monday’s 4.4 magnitude earthquake near Los Angeles’ Highland Park neighborhood occurred along the Puente Hills Fault, also known as the Puente Hills Thrust Fault system. This 25-mile-long ...

A specific type of reverse fault, called a thrust fault, has a shallower angle and can push older rock layers above younger ones, creating significant geological formations. Strike-slip faults ...