Alaska earthquakes

M2.7 earthquake 164 km SSE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 164 km SSE of Chiniak, Alaska on Mon, Feb 19, 2018, 5:23 PM AKST (02:23 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.2 228 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: 2.7 (ml), micro
Local time: Mon, Feb 19, 2018, 5:23 PM AKST
UTC: 2018-02-20 02:23:11 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.371° N, 150.809° 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 6.1 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 277°, poorly surrounded by stations
Stations used: 26

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 us2000d9cc (also filed as ak0182cdqixy, ak18571926). Read Mon, Sep 28, 2026, 8:32 AM UTC.