A massive 7.9 magnitude earthquake Monday in the Aleutian Islands was quickly followed by smaller 5.9 and 6.0 quakes closer to land.
More than 100 aftershocks have rattled Orange County south of Los Angeles where a magnitude-5.1 earthquake struck Friday.
Residents in rural northeastern California assessed damage to their homes and businesses Friday from a magnitude-5.7 earthquake, one of the strongest temblors to hit the densely forested region in decades.
The U.S. Geological Survey reported a series of earthquakes rattled a section of Monterey County and the surrounding region on Wednesday. The latest quake was a magnitude 4.0 that hit at 8 p.m.