Alaska earthquakes

M2.5 earthquake 226 km SE of Chiniak, Alaska

A magnitude 2.5 earthquake struck 226 km SE of Chiniak, Alaska on Sun, May 6, 2018, 8:39 PM AKDT (04:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 224 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: 2.5 (ml), micro
Local time: Sun, May 6, 2018, 8:39 PM AKDT
UTC: 2018-05-07 04:39:50 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.993° N, 150.047° 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 4.8 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.07
Depth from: Operator assigned
Station coverage gap: 233°, poorly surrounded by stations
Stations used: 27

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000e2hr (also filed as ak0185u3va4b, ak19428028). Read Sat, Sep 26, 2026, 11:19 PM UTC.