Alaska earthquakes

M3.0 earthquake 218 km SE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 218 km SE of Chiniak, Alaska on Mon, Apr 23, 2018, 5:48 AM AKDT (13:48 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.2 Gulf of 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: 3.0 (ml), minor
Local time: Mon, Apr 23, 2018, 5:48 AM AKDT
UTC: 2018-04-23 13:48:31 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.498° N, 149.308° 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 8.3 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 215°, poorly surrounded by stations
Stations used: 35

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 us1000dsfv (also filed as ak19274564, ak018573r7sn). Read Mon, Sep 21, 2026, 9:15 PM UTC.