A magnitude 3.7 earthquake struck onshore near Rio Dell in Humboldt County on Friday morning, the U.S. Geological Survey said.

The 7:42 a.m. quake was centered about 4 miles south-southwest of Rio Dell, or 24 miles south of Eureka, the USGS said.

A Humboldt County sheriff's dispatcher said there were no initial reports of damage or problems from the shaker.

Minor earthquakes in the magnitude 3 range are common in the region, though many of them strike off-shore.