Alaska earthquakes

M2.7 earthquake 262 km SE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 262 km SE of Chiniak, Alaska on Sun, Mar 11, 2018, 11:17 PM AKDT (07:17 UTC), 9 km (6 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: 2.7 (ml), micro
Local time: Sun, Mar 11, 2018, 11:17 PM AKDT
UTC: 2018-03-12 07:17:05 UTC
Depth: 9.1 km (5.6 mi), shallow
Epicenter: 55.960° N, 149.223° 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 9.7 km horizontally, 8.6 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 223°, poorly surrounded by stations
Stations used: 52

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 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000d52c (also filed as ak18699052, ak01839jfc8y). Read Sun, Sep 27, 2026, 6:43 PM UTC.