( CNN ) -- An offshore 6.9 magnitude earthquake and aftershocks shook the coast of Northern California and parts of Oregon on Sunday night , the U.S. Geological Survey said . No major damage or injuries were immediately reported . The main quake , centered in the Pacific Ocean about 50 miles west of Eureka , California , happened at 10:18 p.m. PT , the USGS said . The depth was about 10 miles . Mike Meltzer , in Ferndale , just southwest of Eureka , told CNN affiliate KTVU the he felt the quake for about 10 seconds . The only damage that he could see : A bottle fell over . `` I 've been through a number of these , '' Meltzer , a bartender at Ferndale 's Hotel Ivanhoe , told KTVU . `` It was n't a jolter ; it was a wave . '' More than 15 aftershocks were reported in the area within five hours , the strongest of which was a 4.6 magnitude temblor in the ocean , according to the USGS . The strongest shaking was reported in the Eureka area , with weak motion felt in west-central Oregon and in the San Francisco area , according to the USGS . There is no tsunami threat , according to the Pacific Tsunami Warning Center . The shaking drew a number of comments on social media . `` Long rumble , no damage , '' Twitter user @ Amy_Stewart posted . `` Forgot to take the cat when we ran outside . Now he knows where he stands . '' What you need to know about earthquakes . The place where two earthquakes hit every hour . Measuring the magnitude of earthquakes . CNN 's Joe Sutton contributed to this report .
6.9 magnitude centered in Pacific shakes , California , USA , on Sunday night . Located in Ferndale , California : ` ` It was n't a jolter ; it was a wave . '' More than 100 deaths reported within five hours .