Alaska earthquakes

M2.9 earthquake 251 km ESE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 251 km ESE of Chiniak, Alaska on Wed, Mar 21, 2018, 11:23 PM AKDT (07:23 UTC), 21 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: Wed, Mar 21, 2018, 11:23 PM AKDT
UTC: 2018-03-22 07:23:36 UTC
Depth: 20.6 km (12.8 mi), shallow
Epicenter: 56.582° N, 148.595° 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 5.9 km horizontally, 10.4 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 213°, poorly surrounded by stations
Stations used: 32

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 us1000dbj1 (also filed as ak0183q2u5ml, ak18846684). Read Thu, Sep 24, 2026, 2:37 PM UTC.