FERNDALE, Calif. (KGO) -- A preliminary-magnitude 5.7 earthquake struck off the coast of Northern California on Friday afternoon, but there was no threat of a tsunami, officials said.
The quake's epicenter was 133.6 miles west-southwest of Eureka, according to the U.S. Geological Survey. Its depth was measured at 3.6 miles.
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There were no immediate reports of injuries or damage to any coastal areas.