Alaska earthquakes

M3.1 earthquake 278 km ESE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 278 km ESE of Chiniak, Alaska on Wed, Feb 7, 2018, 7:44 PM AKST (04:44 UTC), 20 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: 3.1 (ml), minor
Local time: Wed, Feb 7, 2018, 7:44 PM AKST
UTC: 2018-02-08 04:44:42 UTC
Depth: 20.4 km (12.7 mi), shallow
Epicenter: 56.680° N, 148.017° 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 9.3 km horizontally, 11.5 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 246°, poorly surrounded by stations
Stations used: 47

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 us2000d3n4 (also filed as ak18438852, ak0181sklsqj). Read Mon, Sep 28, 2026, 6:20 PM UTC.