Alaska earthquakes

M3.1 earthquake 228 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 228 km SE of Chiniak, Alaska on Fri, Dec 7, 2018, 7:16 PM AKST (04:16 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.5 254 km ESE of Chiniak, Alaska. This one was a foreshock.

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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, Dec 7, 2018, 7:16 PM AKST
UTC: 2018-12-08 04:16:37 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.240° N, 149.485° 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 7.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 246°, poorly surrounded by stations
Stations used: 18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of 159.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000j8gq (also filed as ak20632642, ak018fpo9xyb, aacse018fpo9xyb). Read Thu, Sep 24, 2026, 12:18 AM UTC.