Alaska earthquakes

M3.3 earthquake 229 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 229 km SE of Chiniak, Alaska on Sat, Feb 10, 2018, 7:39 AM AKST (16:39 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M5.4 252 km ESE of Chiniak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.3 (ml), minor
Local time: Sat, Feb 10, 2018, 7:39 AM AKST
UTC: 2018-02-10 16:39:47 UTC
Depth: 22.4 km (13.9 mi), shallow
Epicenter: 56.311° N, 149.345° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 7.9 km horizontally, 10.3 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 223°, poorly surrounded by stations
Stations used: 58

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000d537 (also filed as ak18463653, ak0181w2smpg). Read Mon, Sep 28, 2026, 4:08 PM UTC.