A preliminary report from the U.S. Geological Survey says the magnitude-4.5 quake struck at 9:11 p.m. Friday at a depth of about five miles. It was located about 40 miles southwest of Eureka and about 250 miles northwest of San Francisco.
The National Tsunami Warning Center says there is no danger of tidal problems and officials in Humboldt County say there are no reports of damages or injuries. Dozens of people reported to the USGS they had felt some light shaking.
It came was in the same offshore area as a magnitude-4.9 quake on Monday and several smaller ones that followed this week.