Alaska earthquakes

M3.1 earthquake 260 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 260 km SE of Chiniak, Alaska on Sat, Mar 10, 2018, 1:25 AM AKST (10:25 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M5.5 276 km ESE of Chiniak, Alaska. This one was a foreshock.

Kodiak forecast More in Alaska

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: Sat, Mar 10, 2018, 1:25 AM AKST
UTC: 2018-03-10 10:25:06 UTC
Depth: 7.4 km (4.6 mi), shallow
Epicenter: 55.814° N, 149.545° 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 6.7 km horizontally, 9.0 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 243°, poorly surrounded by stations
Stations used: 20

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Kodiak, AlaskaPopulation 6,253. Forecast280 kmSE

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 us1000d4ip (also filed as ak18696707, ak01836a6o1u). Read Sun, Sep 27, 2026, 12:41 PM UTC.