Tremors were felt in most of southwestern Arizona and reportedly ... because it is so close to all the fault lines in southern California. “Expect more earthquakes. It’s an active tectonic ...

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 ...

In addition, eighty-one "check" valves were installed on uphill sections of the line to prevent oil ... were added in the Denali Fault area to anticipate earthquake movement.