Alaska earthquakes

M2.8 earthquake 41 km S of Atka, Alaska

A magnitude 2.8 earthquake struck 41 km S of Atka, Alaska on Fri, Aug 11, 2023, 8:46 PM HADT (05:46 UTC), 52 km (32 mi) below the surface.

A larger quake followed: M4.2 79 km SSE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Fri, Aug 11, 2023, 8:46 PM HADT
UTC: 2023-08-12 05:46:45 UTC
Depth: 52.1 km (32.4 mi), shallow
Epicenter: 51.825° N, 174.184° 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 15.0 km horizontally, 45.9 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 260°, poorly surrounded by stations
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 62 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kr2w (also filed as ak023aajmv5d). Read Thu, Oct 1, 2026, 12:57 AM UTC.