Alaska earthquakes

M3.0 earthquake 225 km SE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 225 km SE of Chiniak, Alaska on Thu, Oct 4, 2018, 1:07 PM AKDT (21:07 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.1 257 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: 3.0 (ml), minor
Local time: Thu, Oct 4, 2018, 1:07 PM AKDT
UTC: 2018-10-04 21:07:23 UTC
Depth: 8.1 km (5.0 mi), shallow
Epicenter: 55.981° N, 150.085° 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 11.7 km horizontally, 9.9 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 291°, poorly surrounded by stations
Stations used: 19

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 us1000hawv (also filed as ak018cqgeslo, ak20271221, aacse018cqgeslo). Read Tue, Sep 22, 2026, 6:28 AM UTC.