Quake rattles northern California coast
Several people suffered cuts from shattering glass windows in the town of Eureka.
Pacific Gas & Electric Co said power blackouts have affected about 25,000 customers.
Emergency services officials say a number of buildings have suffered minor damage, including shattered windows and collapsed chimneys.
Five aftershocks followed in the 90 minutes after the Saturday earthquake, the biggest registering at a magnitude of 3.8. The San Francisco Bay area was struck by two light earthquakes on Thursday and Friday.
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