A powerful magnitude-6.9 earthquake struck in the Pacific Ocean off the California coast, about 50 miles west of Eureka, the United States Geological Survey reported.
The quake occurred at 12:18 a.m. ET, 4.3 miles beneath the seabed, according to the USGS.
The Humboldt County Sheriff's Department, which oversees most of the populated areas near the quake, says there have been no calls about damage or injuries.
USGS seismologist Susan Hoover says more than 300 people have reported feeling the temblor on their website.
There is not believed to be any threat of a tsunami, according to the Pacific Tsunami Warning Center.