Alaska earthquakes

M2.8 earthquake 213 km SSE of Unalaska, Alaska

A magnitude 2.8 earthquake struck 213 km SSE of Unalaska, Alaska on Mon, Oct 30, 2023, 11:35 AM AKDT (19:35 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 136 km ESE of Nikolski, Alaska. This one was a foreshock.

Unalaska forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Mon, Oct 30, 2023, 11:35 AM AKDT
UTC: 2023-10-30 19:35:04 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 52.009° N, 165.762° 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 3.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.12
Depth from: Operator assigned
Station coverage gap: 257°, poorly surrounded by stations
Stations used: 16

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Unalaska, AlaskaPopulation 4,491. Forecast214 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 38 in the 60 days after this one and 6 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 us6000lp9y (also filed as ak023dxfcwxm). Read Mon, Sep 28, 2026, 7:31 PM UTC.