Alaska earthquakes

M2.8 earthquake 195 km SSE of Unalaska, Alaska

A magnitude 2.8 earthquake struck 195 km SSE of Unalaska, Alaska on Sat, Jul 31, 2021, 8:09 PM AKDT (04:09 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.9 194 km SSE of Akutan, 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: Sat, Jul 31, 2021, 8:09 PM AKDT
UTC: 2021-08-01 04:09:09 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 52.252° N, 165.398° 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 4.9 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.10
Depth from: Operator assigned
Station coverage gap: 220°, poorly surrounded by stations
Stations used: 29

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast196 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 13 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 us6000f920 (also filed as ak0219sbwlu2). Read Wed, Sep 23, 2026, 8:59 AM UTC.