Northern California earthquake measures 3.4

A 3.4-magnitude earthquake occurred early Sunday morning off the coast of Northern California, the U.S. Geological Survey said.     

The quake was reported at 7:09 a.m., centered about 63 miles west southwest of Ferndale, according to the science bureau. 

It had a depth of 4 kilometers, or approximately 2.5 miles.     

No damage has been reported in connection with the earthquake.