Alaska earthquakes

M3.1 earthquake 217 km SE of Chiniak, Alaska

A magnitude 3.1 earthquake struck 217 km SE of Chiniak, Alaska on Thu, Oct 25, 2018, 10:55 AM AKDT (18:55 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 218 km SE 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: Thu, Oct 25, 2018, 10:55 AM AKDT
UTC: 2018-10-25 18:55:05 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.157° N, 149.904° 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 3.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 190°, poorly surrounded by stations
Stations used: 49

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 197 in the 60 days after this one and 184 in the 30 days before it.

After

The first 60 of 197.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000i5lr (also filed as ak20290747, aacse018dp571c1, ak018dp571c1). Read Mon, Sep 28, 2026, 7:57 PM UTC.