Alaska earthquakes

M3.1 earthquake 237 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 237 km SE of Chiniak, Alaska on Fri, Mar 30, 2018, 4:34 PM AKDT (00:34 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M5.5 276 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: Fri, Mar 30, 2018, 4:34 PM AKDT
UTC: 2018-03-31 00:34:00 UTC
Depth: 17.6 km (11.0 mi), shallow
Epicenter: 56.024° N, 149.685° 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 8.1 km horizontally, 8.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 192°, poorly surrounded by stations
Stations used: 91

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 us2000dx7v (also filed as ak01844ukj4f, ak18854698). Read Sat, Sep 26, 2026, 1:30 AM UTC.