Alaska earthquakes

M3.6 earthquake 270 km SE of Chiniak, Alaska

A magnitude 3.6 earthquake struck 270 km SE of Chiniak, Alaska on Mon, Mar 5, 2018, 2:29 PM AKST (23:29 UTC), 22 km (14 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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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.6 (ml), minor
Local time: Mon, Mar 5, 2018, 2:29 PM AKST
UTC: 2018-03-05 23:29:55 UTC
Depth: 21.9 km (13.6 mi), shallow
Epicenter: 56.236° N, 148.610° 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 7.5 km horizontally, 9.9 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 177°
Stations used: 125

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 us2000dcmg (also filed as ak18594716, ak0182y89itp). Read Sun, Sep 27, 2026, 1:37 PM UTC.