WILLOW, Alaska (CBS SF) — The U.S. Geological Survey says a strong earthquake struck in Alaska, but no tsunami was expected.

The 6.2-magnitude quake struck at 2:32 p.m. with its epicenter about 64 miles west of Willow, Alaska. It was later downgraded to a magnitude 5.8 quake by the USGS.

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The quake struck at a depth of 64 miles.

Deeper quakes are less noticeable while a shallow quake–in the 0 to 40 mile depth range–can feel much stronger than their actual reported magnitude. Quakes just below the earth’s surface, in the 0 to 10 miles range, can cause even more damage at lower magnitudes.

No damage or injuries were immediately reported.

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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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