Alaska earthquakes

M3.1 earthquake 219 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 219 km SE of Chiniak, Alaska on Tue, Oct 2, 2018, 8:22 AM AKDT (16:22 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.6 258 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, Oct 2, 2018, 8:22 AM AKDT
UTC: 2018-10-02 16:22:42 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.167° N, 149.839° 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, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 245°, poorly surrounded by stations
Stations used: 23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hbfq (also filed as ak018cn2g6vl, ak20279941, aacse018cn2g6vl). Read Tue, Sep 22, 2026, 3:49 PM UTC.