Using underwater mapping techniques, scientists have mapped the Cascadia Subduction Zone - a 600-mile fault line extending ...

In this type of fault, the block of rock above the fault plane, known as the hanging wall, moves downward relative to the block below, called the footwall. Normal faults are typically found at ...

DUBLIN, Calif. (KGO) -- From Napa to Santa Cruz, many Bay Area residents say they felt the big jolt of a 3.9 earthquake on the Calaveras fault in the East Bay. It struck at 7:46 p.m. Monday night ...

Dozens reported feeling the 3.6-magnitude earthquake in southeastern Canada, the U.S. Geological ... leaking gas and water lines, or downed power lines,” officials say. “Expect aftershocks ...