Alaska earthquakes

M3.1 earthquake 220 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 220 km SE of Chiniak, Alaska on Tue, Mar 6, 2018, 2:08 PM AKST (23:08 UTC), 26 km (16 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: Tue, Mar 6, 2018, 2:08 PM AKST
UTC: 2018-03-06 23:08:38 UTC
Depth: 26.4 km (16.4 mi), shallow
Epicenter: 56.039° N, 150.091° 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 8.5 km horizontally, 12.8 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 228°, poorly surrounded by stations
Stations used: 51

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 us1000d449 (also filed as ak0182zvobuv, ak18694778). Read Sun, Sep 27, 2026, 2:45 PM UTC.