MENLO PARK (CBS SF) — A moderately strong earthquake struck off the Northern California coast Friday evening, the USGS reports.

The quake occurred around 8:30 p.m. and registered magnitude 5.6 with an epicenter about 73 miles west of Ferndale in Humboldt County.

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No reports of damage or tsunami alerts have been received.

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COMPLETE QUAKE COVERAGE: CBS Earthquake Resource Center

This article will be updated as information warrants, and follow KPIX 5 on Twitter at @CBSSF or KCBS Radio on Twitter at @KCBSNews for updates on breaking news anytime.

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Strong earthquakes with an epicenter off the coast can trigger tsunamis, depending on the size and type of the fault movement. The Pacific Tsunami Warning Center tracks earthquake data for the West Coast.
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