The Helena Valley sits atop a variety of different sediments and rocks, making it particularly susceptible to earthquake ...

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 ...

Supershear earthquakes are more common than previously believed, some scientists say — carrying potentially profound risk for communities across California.

These are two very different fault systems, but the sediment record suggests that in the past, at least three San Andreas ...

The five largest continental transform earthquakes since 2000 all originated on a branch of the main fault—and two researchers predict that the next great earthquake of this type will also get its ...

THE discovery of the Bogo Bay Fault Line has far-reaching implications for Cebu, as it paves the way for more accurate active ...

A major earthquake hasn't struck any of California's biggest cities in more than three decades, but the "Big One" is a matter ...

Lasting only a minute, it shook Pioneer Square with vigor and rattled office and convention centers from Seattle to Olympia ...

Below California’s famed beaches, mountains and metropolitan areas lies a sinister web of earthquake faults — some so infamous that their names are burned into the state’s collective consciousness.

Researchers posed a seemingly simple question: how wide are faults? At the Seismological Society of America's Annual Meeting, researchers posed a seemingly simple question: how wide are faults? Using ...

A new kind of earthquake has been detected in western Canada, one that shakes the ground slower and longer than typical seismic events. These earthquakes, recorded during hydraulic fracturing for oil ...