Alaska earthquakes

M3.1 earthquake 214 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 214 km SE of Chiniak, Alaska on Wed, Feb 7, 2018, 7:58 PM AKST (04:58 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M5.2 228 km SE 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, 7:58 PM AKST
UTC: 2018-02-08 04:58:58 UTC
Depth: 24.3 km (15.1 mi), shallow
Epicenter: 56.089° N, 150.134° 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 9.4 km horizontally, 13.7 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 213°, poorly surrounded by stations
Stations used: 54

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 us2000d3n7 (also filed as ak18413544, ak0181skotqu). Read Tue, Sep 29, 2026, 6:45 AM UTC.