Alaska earthquakes

M3.6 earthquake 238 km SE of Chiniak, Alaska

A magnitude 3.6 earthquake struck 238 km SE of Chiniak, Alaska on Fri, Mar 30, 2018, 5:18 PM AKDT (01:18 UTC), 8 km (5 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: 3.6 (ml), minor
Local time: Fri, Mar 30, 2018, 5:18 PM AKDT
UTC: 2018-03-31 01:18:40 UTC
Depth: 8.1 km (5.0 mi), shallow
Epicenter: 55.914° N, 149.910° 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 8.7 km horizontally, 8.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 190°, poorly surrounded by stations
Stations used: 109

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

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000dbs8 (also filed as ak01844v2mjc, ak18855933). Read Fri, Sep 25, 2026, 11:47 AM UTC.