It was a groundbreaking discovery. Scientists have found previously concealed fault lines along California’s north coast, sparking concerns that we could be drastically underestimating the earthquake ...

Off the rugged north coast of California, one of the most seismically volatile corners of the United States is yielding a new and unsettling secret. By tracking swarms of earthquakes far too small for ...

When most people think of earthquakes, they think of California fault lines. But the most active earthquake zone east of the Rocky Mountains runs straight through the middle of the country — including ...