Preliminary 4.1 magnitude earthquake strikes Northern California ...

A preliminary 4.1 magnitude earthquake struck off the coast of Northern California near Humboldt County early Tuesday morning, according to the United States Geological Survey. 

The quake, which struck at 12:13 a.m., was centered about 13 miles west of Petrolia, 23.7 miles southwest of Ferndale and 39.7 miles south-southwest of Eureka. 

Further information was not immediately available.

This is a developing story. Details may change as more information becomes available. Stay tuned for updates.

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