Alaska earthquakes

M2.9 earthquake 234 km SE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 234 km SE of Chiniak, Alaska on Sat, Mar 31, 2018, 8:51 PM AKDT (04:51 UTC), 22 km (13 mi) below the surface.

A larger quake followed: M5.5 276 km ESE 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: 2.9 (ml), micro
Local time: Sat, Mar 31, 2018, 8:51 PM AKDT
UTC: 2018-04-01 04:51:52 UTC
Depth: 21.6 km (13.4 mi), shallow
Epicenter: 56.003° N, 149.801° 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 8.6 km horizontally, 10.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 214°, poorly surrounded by stations
Stations used: 63

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 us2000dw59 (also filed as ak01846kld9m, ak19074648). Read Fri, Sep 25, 2026, 6:55 PM UTC.