The Puente Hills fault system is back in focus after a 4.4-magnitude earthquake near Highland Park. It is one of several similar faults in the Los Angeles Basin.

Scientists believe the Puente Hills fault has a major quake roughly every few thousand years — but they don’t know when the last one was. The San Andreas fault has quakes more frequently; it ...

The Puente Hills fault system was previously unknown to scientists when it ruptured in 1987, causing the magnitude 5.9 Whittier Narrows earthquake that caused $358 million in damage.

The Puente Hills fault line, which brought us Monday’s 4.4 magnitude earthquake is more dangerous to Los Angeles than the San Andreas, according to seismologist Lucy Jones.

The USGS has estimated that a major magnitude 7.8 earthquake on the San Andreas fault could kill about 1,800 people, while a 7.5 magnitude quake on the Puente Hills thrust fault could kill as many ...

This 25-mile-long fault runs from the Glendale/Pasadena area to Puente Hills and has been extremely active in recent months. The same fault was the site of a magnitude 3.4 quake on June 2 and a ...

The Puente Hills thrust fault, which brought Friday night's magnitude-5.1 quake centered in La Habra and well over 100 aftershocks by Sunday, stretches from northern Orange County under downtown ...

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.

T he 4.4 magnitude earthquake that was felt in many Southern California cities Monday fell on the Puente Hills Thrust Fault ...

A 4.4 magnitude earthquake in Los Angeles in August was along the Puente Hills fault system, a thrust fault that runs beneath one of the city's oldest and most densely populated areas.

The Puente Hills thrust fault is the same overall fault network that produced the Whittier Narrows – which measured a 5.9 magnitude, killed eight people and caused some $358 million in damage in ...