Alaska earthquakes

M3.3 earthquake 22 km NW of Atka, Alaska

A magnitude 3.3 earthquake struck 22 km NW of Atka, Alaska on Wed, Feb 8, 2023, 11:15 PM HAST (09:15 UTC), 194 km (120 mi) below the surface.

A larger quake followed: M4.5 91 km ESE of Adak, 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: 3.3 (ml), minor
Local time: Wed, Feb 8, 2023, 11:15 PM HAST
UTC: 2023-02-09 09:15:09 UTC
Depth: 193.6 km (120.3 mi), intermediate-depth
Epicenter: 52.356° N, 174.411° 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 14.8 km horizontally, 2.6 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 139°
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 50 in the 60 days after this one and 22 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 us6000jpka (also filed as ak0231uay13o). Read Wed, Sep 30, 2026, 11:53 AM UTC.