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Two Magnitude 5.0+ Earthquakes Strike Off Humboldt County Coast

HUMBOLDT COUNTY (KPIX 5) -- Two moderate earthquakes struck about 100 miles off the Humboldt County coast within one hour of each other Thursday morning, according to the U.S. Geological Survey.

The USGS reports that a magnitude 5.8 earthquake struck at 8:39 a.m., with the epicenter in the Pacific Ocean about 100 miles west of the community of Capetown, at a depth of 3 miles.

Humboldt Earthquake
Map of magnitude 5.8 earthquake that struck 100 miles off the Humboldt County coast on January 25, 2018. (USGS)

Shortly after the first earthquake, the National Tsunami Warning Center said a tsunami was not expected.

A second earthquake, a magnitude 5.0, struck the same area at 9:24 a.m.

Visitors to the USGS website from the Eureka area reported light shaking from both earthquakes. There is no immediate reports of damage or injuries.

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.

Tsunami Alerts & Maps

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