Alaska earthquakes

M2.8 earthquake 139 km SSW of Atka, Alaska

A magnitude 2.8 earthquake struck 139 km SSW of Atka, Alaska on Thu, Feb 27, 2020, 7:52 AM HAST (17:52 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 117 km SSW 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: Thu, Feb 27, 2020, 7:52 AM HAST
UTC: 2020-02-27 17:52:10 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.066° N, 175.057° 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, 1.9 km in depth
Magnitude uncertainty: ±0.15
Depth from: Operator assigned
Station coverage gap: 268°, poorly surrounded by stations
Stations used: 20

Nearby

Within 100 km, magnitude 1.5 and up: 78 in the 60 days after this one and 81 in the 30 days before it.

After

The first 60 of 78.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60008b86 (also filed as ak0202o7locp). Read Wed, Sep 30, 2026, 11:31 AM UTC.