Alaska earthquakes

M4.2 earthquake 237 km SE of Chiniak, Alaska

A magnitude 4.2 earthquake struck 237 km SE of Chiniak, Alaska on Fri, May 25, 2018, 12:26 PM AKDT (20:26 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.3 245 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: 4.2 (mb), light
Local time: Fri, May 25, 2018, 12:26 PM AKDT
UTC: 2018-05-25 20:26:46 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.176° N, 149.402° 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 6.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.30
Depth from: Operator assigned
Station coverage gap: 141°
Stations used: 231

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 us1000ecd4 (also filed as ak0186o4zo7s, ak19663370, aacse0186o4zo7s). Read Mon, Sep 21, 2026, 10:13 PM UTC.