A powerful earthquake with a preliminary magnitude of 7.0 struck off the coast of Northern California ... the stress in the surrounding fault lines, there may be some smaller earthquakes on ...
and smaller earthquakes are felt in the region roughly every two to three years. On the West Coast, it can be possible to determine exactly which fault line a quake originated along, the USGS said ...
Northern California was rocked by a 7.0 magnitude earthquake ... to the west-southwest of Humboldt County’s Ferndale, a tsunami warning was issued for a wide swath of the West Coast.