Add Yahoo as a preferred source to see more of our stories on Google. Researchers have discovered evidence of “partial synchronization” of two of the world’s most famous fault lines—the northern San ...

Readers ask: “Where exactly is the Balcones Fault?” And while we’re at it, “What precisely is the Balcones Escarpment?” Excellent questions. Even some old-timers can’t tell you exactly where these two ...

There's a sleeping fault line that runs along the border between Canada and Alaska. The line has been dormant for millions of years as best scientists can tell. But new research suggests it could be ...

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 ...

Here’s what you’ll learn when you read this story: Researchers hoping to unravel the dance of earthquake movement in North America’s West Coast discovered a disturbing fact: Two of the world’s largest ...