Alaska earthquakes

M3.1 earthquake 252 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 252 km SE of Chiniak, Alaska on Fri, May 11, 2018, 4:13 AM AKDT (12:13 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.8 224 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: Fri, May 11, 2018, 4:13 AM AKDT
UTC: 2018-05-11 12:13:30 UTC
Depth: 21.1 km (13.1 mi), shallow
Epicenter: 56.020° N, 149.339° 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 8.7 km horizontally, 10.6 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 199°, 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 us1000e5x0 (also filed as ak19565651, ak01860umiv1). Read Sat, Sep 26, 2026, 12:26 PM UTC.