A light, 4.7-magnitude earthquake struck in Northern California on Wednesday, according to the United States Geological Survey. The temblor happened at 6:34 p.m. Pacific time about 2 miles northwest of Cobb, Calif., or about 70 miles north of San Francisco, data from the agency shows.

A major earthquake appears to have struck on Sunday afternoon. The United States has been hit by several earthquakes in recent weeks. A 7.0 magnitude earthquake reportedly hit in Northern California earlier in December.

A magnitude 4.7 earthquake hit Lake County in Northern California on New Year's Day with no major damage reported.

The quake epicenter was 2 miles north-northwest of Cobb, a small community in the hills south of Clear Lake. The epicenter was 70 miles west of Sacramento and 27 miles north of Santa Rosa. A ShakeAlert was issued to cellphone users in portions of Lake, Sonoma, Napa and Mendocino counties, according to the USGS.

A magnitude 4.7 earthquake shook the Lake County area on Wednesday night, according to the United States Geological Survey. The tremor struck at 6:34 p.m. and was located 2.3 miles northwest of Cobb,

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The temblor was initially rated at 4.5 magnitude, then revised to 4.7 roughly a half hour later. Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says.