NORTH COAST, Calif. — A moderately sized earthquake occurred late Saturday night near Cobb.

The 4.1-magnitude quake was reported at 11:54 p.m. Saturday, according to the U.S. Geological Survey.

A survey map showed the quake was just inside the Sonoma County line near Big Sulphur Creek.

The epicenter was 5.8 miles west of Cobb and 13.8 miles north of Healdsburg, the survey reported

The U.S. Geological Survey received dozens of shake reports from residents of Lake, Napa and Sonoma counties.

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