Alaska earthquakes

M2.7 earthquake 231 km SE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 231 km SE of Chiniak, Alaska on Fri, Aug 21, 2020, 9:35 PM AKDT (05:35 UTC), 20 km (12 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: 2.7 (ml), micro
Local time: Fri, Aug 21, 2020, 9:35 PM AKDT
UTC: 2020-08-22 05:35:30 UTC
Depth: 20.1 km (12.5 mi), shallow
Epicenter: 56.258° N, 149.390° 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, 11.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 259°, poorly surrounded by stations
Stations used: 42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 38 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bm8f (also filed as ak020asqhape). Read Sat, Sep 26, 2026, 7:33 PM UTC.