Alaska earthquakes

M2.9 earthquake 222 km SE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 222 km SE of Chiniak, Alaska on Sun, Feb 4, 2018, 9:22 PM AKST (06:22 UTC), 21 km (13 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: 2.9 (ml), micro
Local time: Sun, Feb 4, 2018, 9:22 PM AKST
UTC: 2018-02-05 06:22:52 UTC
Depth: 20.5 km (12.8 mi), shallow
Epicenter: 56.058° N, 149.983° 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 9.0 km horizontally, 10.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 223°, poorly surrounded by stations
Stations used: 55

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 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000d287 (also filed as ak0181nn1xdc, ak18436546). Read Tue, Sep 29, 2026, 12:13 AM UTC.