Alaska earthquakes

M2.8 earthquake 245 km ESE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 245 km ESE of Chiniak, Alaska on Mon, Mar 12, 2018, 7:09 PM AKDT (03:09 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.1 266 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: 2.8 (ml), micro
Local time: Mon, Mar 12, 2018, 7:09 PM AKDT
UTC: 2018-03-13 03:09:21 UTC
Depth: 20.5 km (12.7 mi), shallow
Epicenter: 56.575° N, 148.707° 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 5.4 km horizontally, 11.0 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 246°, poorly surrounded by stations
Stations used: 30

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 us1000d5hl (also filed as ak18701155, ak0183b4j9om). Read Tue, Sep 22, 2026, 6:57 AM UTC.