Alaska earthquakes

M3.6 earthquake 231 km SE of Chiniak, Alaska

A magnitude 3.6 earthquake struck 231 km SE of Chiniak, Alaska on Thu, Oct 15, 2020, 6:53 AM AKDT (14:53 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.7 251 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: Thu, Oct 15, 2020, 6:53 AM AKDT
UTC: 2020-10-15 14:53:43 UTC
Depth: 20.9 km (13.0 mi), shallow
Epicenter: 56.002° N, 149.869° 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 8.9 km horizontally, 11.3 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 235°, poorly surrounded by stations
Stations used: 29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 11 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000c8jh (also filed as ak020da6ysu6). Read Sat, Sep 26, 2026, 5:50 AM UTC.