Alaska earthquakes

M2.8 earthquake 253 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 253 km SE of Chiniak, Alaska on Tue, Aug 11, 2020, 11:12 PM AKDT (07:12 UTC), 22 km (14 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: 2.8 (ml), micro
Local time: Tue, Aug 11, 2020, 11:12 PM AKDT
UTC: 2020-08-12 07:12:41 UTC
Depth: 22.2 km (13.8 mi), shallow
Epicenter: 56.365° N, 148.794° 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 5.3 km horizontally, 11.5 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 242°, poorly surrounded by stations
Stations used: 34

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 37 in the 60 days after this one and 34 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bdha (also filed as ak020ac85ss7). Read Sat, Sep 26, 2026, 6:35 AM UTC.