Authorities detected a preliminary magnitude seven earthquake that struck around 60 miles off the coast of Ferndale, in Humboldt County.
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Residents in San Francisco and Santa Cruz responded swiftly to a tsunami warning issued after a powerful earthquake struck off the..
A tsunami warning was cancelled after the 7.0 magnitude quake shook parts of the West coast.
A tsunami warning has been issued following a 7.0 magnitude earthquake off the coast of northern California.
