5.5 quake strikes near Eureka, Calif. By Ken Schwencke February 13, 2012, 1:30 p.m. A shallow magnitude 5.5 earthquake was reported Monday afternoon six miles from Weitchpec, Calif., according to the U.S. Geological Survey. The temblor occurred at 1:07 p.m. Pacific time at a depth of 19.9 miles. According to the USGS, the epicenter was 17 miles from Westhaven-Moonstone, 18 miles from Trinidad, 31 miles from Eureka and 218 miles from Sacramento. In the last 10 days, there has been one earthquake magnitude 3.0 or greater centered nearby. There were no immediate reports of injury or damage in the area, which is known for frequent seismic activity.