Alaska earthquakes

M2.6 earthquake 243 km SE of Chiniak, Alaska

A magnitude 2.6 earthquake struck 243 km SE of Chiniak, Alaska on Thu, Feb 15, 2018, 3:23 PM AKST (00:23 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M5.4 252 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: 2.6 (ml), micro
Local time: Thu, Feb 15, 2018, 3:23 PM AKST
UTC: 2018-02-16 00:23:40 UTC
Depth: 7.8 km (4.8 mi), shallow
Epicenter: 55.978° N, 149.642° 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, 9.4 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 268°, poorly surrounded by stations
Stations used: 18

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 us2000d771 (also filed as ak18504504, ak01825qeca2). Read Tue, Sep 29, 2026, 6:41 AM UTC.