Alaska earthquakes

M3.0 earthquake 273 km ESE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 273 km ESE of Chiniak, Alaska on Fri, Apr 20, 2018, 2:52 PM AKDT (22:52 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M3.3 252 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: Fri, Apr 20, 2018, 2:52 PM AKDT
UTC: 2018-04-20 22:52:58 UTC
Depth: 20.4 km (12.7 mi), shallow
Epicenter: 56.425° N, 148.342° 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 5.4 km horizontally, 9.8 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 219°, poorly surrounded by stations
Stations used: 45

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 us1000drak (also filed as ak01852aj2na, ak19263894). Read Tue, Sep 22, 2026, 10:46 AM UTC.