BREAKING: 6.5-magnitude earthquake off California coast

A 6.8-magnitude earthquake shakes ocean floor about 100 miles off the northern California coast.

A 6.5-magnitude earthquake shakes ocean floor about 100 miles off the northern California coast.

The quake struck 100 miles west of Ferndale, California, at a shallow depth of 10km, according to the scientific agency the United States Geological Survey (the USGC).