Alaska earthquakes

M3.2 earthquake 230 km SE of Chiniak, Alaska

A magnitude 3.2 earthquake struck 230 km SE of Chiniak, Alaska on Fri, Apr 20, 2018, 10:35 AM AKDT (18:35 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.5 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: 3.2 (ml), minor
Local time: Fri, Apr 20, 2018, 10:35 AM AKDT
UTC: 2018-04-20 18:35:58 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.200° N, 149.523° 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 7.4 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 195°, poorly surrounded by stations
Stations used: 57

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 us1000draf (also filed as ak0185281p77, ak19263875). Read Mon, Sep 21, 2026, 6:19 PM UTC.