Alaska earthquakes

M3.1 earthquake 67 km E of Atka, Alaska

A magnitude 3.1 earthquake struck 67 km E of Atka, Alaska on Sun, Apr 16, 2023, 2:38 AM HADT (11:38 UTC), 74 km (46 mi) below the surface.

A larger quake followed: M3.9 25 km ENE of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Sun, Apr 16, 2023, 2:38 AM HADT
UTC: 2023-04-16 11:38:45 UTC
Depth: 74.5 km (46.3 mi), intermediate-depth
Epicenter: 52.121° N, 173.218° 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 11.5 km horizontally, 11.2 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 197°, poorly surrounded by stations
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 34 in the 60 days after this one and 19 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 us6000k5wl (also filed as ak0234vhqtcz). Read Wed, Sep 30, 2026, 6:13 PM UTC.