Alaska earthquakes

M2.9 earthquake 251 km SE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 251 km SE of Chiniak, Alaska on Sat, Aug 22, 2020, 2:20 AM AKDT (10:20 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 205 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: 2.9 (ml), micro
Local time: Sat, Aug 22, 2020, 2:20 AM AKDT
UTC: 2020-08-22 10:20:08 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.325° N, 148.882° 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 9.1 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: Operator assigned
Station coverage gap: 225°, poorly surrounded by stations
Stations used: 30

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 39 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bm8g (also filed as ak020astd9cn). Read Mon, Sep 28, 2026, 6:17 PM UTC.