Magnitude-5.7 Earthquake Strikes Off Northern California Coast

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A quake struck Jan. 28, 2015, off the Northern California coast. (Credit: USGS)

A magnitude-5.7 earthquake struck off the far Northern California coast on Wednesday afternoon, according to the U.S. Geological Survey.

The temblor stuck about 1:08 p.m. about 25 miles southwest of Ferndale, and 40 miles southwest of Eureka (map). The quake struck at a depth of 17 kilometers, or about 10.6 miles.

It was felt as moderate and light shaking on shore in Fortuna, Eureka and further inland in Red Bluff, according to USGS’ “Did You Feel It?” page.

About 45 minutes after the quake, those in the area reported only light-to-moderate shaking. (Credit: USGS)

About 45 minutes after the quake, those in the area reported only light-to-moderate shaking. (Credit: USGS)

No tsunami warning was issued by the National Tsunami Warning Center.

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The probably of an aftershock within the next seven days was 40 percent, according to the Northern California Seismic System.

The location of the epicenter is about 550 miles north-northeast of downtown Los Angeles.

The quake was initially reported as a 5.1 and then as a 5.8 before USGS revised the temblor to a 5.7.