Alaska earthquakes

M3.6 earthquake 57 km S of Adak, Alaska

A magnitude 3.6 earthquake struck 57 km S of Adak, Alaska on Sun, Oct 29, 2023, 10:47 PM HADT (07:47 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M6.1 116 km SE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.6 (ml), minor
Local time: Sun, Oct 29, 2023, 10:47 PM HADT
UTC: 2023-10-30 07:47:08 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.356° N, 176.587° 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 2.2 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 212°, poorly surrounded by stations
Stations used: 34

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 103 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000lnxm (also filed as ak023dx8a9wd). Read Thu, Oct 1, 2026, 12:32 AM UTC.