Alaska earthquakes

M2.8 earthquake 42 km SSE of Atka, Alaska

A magnitude 2.8 earthquake struck 42 km SSE of Atka, Alaska on Fri, Feb 28, 2020, 8:58 PM HAST (06:58 UTC), 59 km (37 mi) below the surface.

A larger quake followed: M4.2 53 km NNW 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, Feb 28, 2020, 8:58 PM HAST
UTC: 2020-02-29 06:58:46 UTC
Depth: 59.3 km (36.9 mi), shallow
Epicenter: 51.872° N, 173.865° 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 20.6 km horizontally, 53.6 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 284°, poorly surrounded by stations
Stations used: 24

Nearby

Within 100 km, magnitude 1.5 and up: 59 in the 60 days after this one and 28 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 us60008d0a (also filed as ak0202rc5ydb). Read Wed, Sep 30, 2026, 3:27 PM UTC.