Alaska earthquakes

M3.6 earthquake 236 km SE of Chiniak, Alaska

A magnitude 3.6 earthquake struck 236 km SE of Chiniak, Alaska on Sun, Sep 16, 2018, 10:38 PM AKDT (06:38 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.9 255 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: Sun, Sep 16, 2018, 10:38 PM AKDT
UTC: 2018-09-17 06:38:29 UTC
Depth: 9.3 km (5.7 mi), shallow
Epicenter: 55.918° N, 149.932° 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 7.0 km horizontally, 6.1 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 187°, poorly surrounded by stations
Stations used: 157

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000hfqq (also filed as ak018by3j1vl, ak20256266, aacse018by3j1vl). Read Mon, Sep 21, 2026, 11:34 PM UTC.