Alaska earthquakes

M2.8 earthquake 41 km ENE of Atka, Alaska

A magnitude 2.8 earthquake struck 41 km ENE of Atka, Alaska on Sat, Oct 24, 2020, 2:19 AM HADT (11:19 UTC), 166 km (103 mi) below the surface.

A larger quake followed: M5.5 123 km NNE of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Sat, Oct 24, 2020, 2:19 AM HADT
UTC: 2020-10-24 11:19:32 UTC
Depth: 165.9 km (103.1 mi), intermediate-depth
Epicenter: 52.367° N, 173.668° 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 19.8 km horizontally, 7.5 km in depth
Magnitude uncertainty: ±0.15
Depth from: From location
Station coverage gap: 167°
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 46 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 us7000c8jc (also filed as ak020dp0tc1z). Read Tue, Sep 29, 2026, 1:33 PM UTC.