Alaska earthquakes

M3.6 earthquake 39 km N of Atka, Alaska

A magnitude 3.6 earthquake struck 39 km N of Atka, Alaska on Thu, Dec 28, 2023, 5:15 PM HAST (03:15 UTC), 223 km (139 mi) below the surface.

A larger quake followed: M4.4 74 km WNW of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.6 (mb), minor
Local time: Thu, Dec 28, 2023, 5:15 PM HAST
UTC: 2023-12-29 03:15:57 UTC
Depth: 223.2 km (138.7 mi), intermediate-depth
Epicenter: 52.547° N, 174.183° 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 19.4 km horizontally, 9.9 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 126°
Stations used: 28

Nearby

Within 100 km, magnitude 1.5 and up: 56 in the 60 days after this one and 36 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 us6000m4kh (also filed as ak023godyqze). Read Thu, Oct 1, 2026, 12:44 AM UTC.