Alaska earthquakes

M2.7 earthquake 55 km NNW of Atka, Alaska

A magnitude 2.7 earthquake struck 55 km NNW of Atka, Alaska on Wed, Oct 28, 2020, 9:47 PM HADT (06:47 UTC), 183 km (114 mi) below the surface.

A larger quake followed: M4.6 47 km WSW of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.7 (ml), micro
Local time: Wed, Oct 28, 2020, 9:47 PM HADT
UTC: 2020-10-29 06:47:01 UTC
Depth: 183.0 km (113.7 mi), intermediate-depth
Epicenter: 52.665° N, 174.460° 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 14.3 km horizontally, 10.3 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 170°
Stations used: 23

Nearby

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 29 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 us7000c7ps (also filed as ak020dx7ouzx). Read Mon, Sep 28, 2026, 4:02 AM UTC.