YUMA, AZ (AZFamily) — The 4.6 earthquake at 5:00 a.m. on Wednesday wasn’t the alarm clock many in Yuma were hoping for, but it was a good reminder of how close California’s fault lines are.

From Napa to Santa Cruz, people felt the jolt of a 3.9 earthquake Monday. The epicenter was near Dublin on the Calaveras ...

TUBA CITY, AZ — A minor earthquake shook parts of northern Arizona early Saturday morning, according to the U.S. Geological Survey. The quake struck just before 4:15 a.m., southeast of Tuba City.

New information about fault behavior has been obtained via recent collaborative studies of stream channel offsets along the San Andreas Fault. New information about fault behavior has been ...