Alaska earthquakes

M4.2 earthquake 249 km SE of Chiniak, Alaska

A magnitude 4.2 earthquake struck 249 km SE of Chiniak, Alaska on Thu, May 24, 2018, 5:45 AM AKDT (13:45 UTC), 18 km (11 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: Thu, May 24, 2018, 5:45 AM AKDT
UTC: 2018-05-24 13:45:23 UTC
Depth: 18.4 km (11.4 mi), shallow
Epicenter: 56.385° N, 148.841° 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 5.3 km horizontally, 5.9 km in depth
Magnitude uncertainty: ±0.26
Depth from: From location
Station coverage gap: 142°
Stations used: 70

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 us1000eb7g (also filed as ak0186mdeb8a, ak19655382, aacse0186mdeb8a). Read Tue, Sep 22, 2026, 6:55 PM UTC.