Magnitude 5.7 earthquake hits 120 miles off of Northern California Coast

Two moderate earthquakes near Humboldt County were reported early Friday afternoon by the United States Geological Survey, but sources confirmed it was only one, a magnitude 5.7 in the ocean 120 miles off of Ferndale.

The measuring instrument recorded enough movement that Ferndale residents should have felt the seismic activity, though only a few people have reported feeling it, according to Jack Boatwright, a seismologist out of the USGS office in Menlo Park.

It was recorded at 12:50 p.m. with a depth of nine kilometers in an area west of Humboldt Bay, a location familiar with similar events.

“The Mendocino Fracture Zone is a continual source of moderate to large quakes,” Boatwright said. “Fortunately, no one lives out there.”

The area was shaken by a magnitude 6.5 quake in December 2016. 

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