The San Jacinto Fault, considered part of the San Andreas Fault system, has a 5% chance of magnitude 6.7 or larger earthquakes. The line begins at Cajun Pass and runs southeast through San Bernardino, ...

The Pacific is ringed by a vast tectonic boundary that stretches for tens of thousands of kilometers, a shifting seam where plates grind, dive and tear past one another. That planetary-scale fault ...

A strip of restless ocean off the Pacific Northwest conceals a threat that has been building for centuries. Beneath these waters lies the Cascadia Subduction Zone—a 600-mile fault line locked since ...