Alaska earthquakes

M2.6 earthquake 96 km WNW of Atka, Alaska

A magnitude 2.6 earthquake struck 96 km WNW of Atka, Alaska on Thu, Sep 28, 2023, 10:43 AM HADT (19:43 UTC), 198 km (123 mi) below the surface.

A larger quake followed: M4.1 94 km NNE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.6 (ml), micro
Local time: Thu, Sep 28, 2023, 10:43 AM HADT
UTC: 2023-09-28 19:43:28 UTC
Depth: 198.1 km (123.1 mi), intermediate-depth
Epicenter: 52.658° N, 175.395° 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, 12.8 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 183°, poorly surrounded by stations
Stations used: 14

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 21 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 us6000lezt (also filed as ak023cgi7k71). Read Thu, Oct 1, 2026, 12:45 AM UTC.