Alaska earthquakes

M2.8 earthquake 190 km SSE of Atka, Alaska

A magnitude 2.8 earthquake struck 190 km SSE of Atka, Alaska on Fri, Aug 28, 2020, 5:27 PM HADT (02:27 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.1 180 km SSE of Atka, Alaska. This one was a foreshock.

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: Fri, Aug 28, 2020, 5:27 PM HADT
UTC: 2020-08-29 02:27:33 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.664° N, 172.964° 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 4.4 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 305°, poorly surrounded by stations
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 4 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bp0c (also filed as ak020b49eppf). Read Wed, Sep 30, 2026, 1:49 PM UTC.