PETROLIA, Calif. (AP) — An offshore earthquake has been reported along California’s north coast.

A U.S. Geological Survey computer-generated report says the magnitude-4.1 quake struck at 1:38 a.m. Friday and was centered 36 miles west of Petrolia, which is about 260 miles north of San Francisco.

A Humboldt County sheriff’s dispatcher says there have been no calls about damage or injury, adding she didn’t even feel the quake.

Copyright 2012 The Associated Press.