Alaska earthquakes

M3.6 earthquake 68 km SE of Unalaska, Alaska

A magnitude 3.6 earthquake struck 68 km SE of Unalaska, Alaska on Sat, Feb 29, 2020, 5:51 AM AKST (14:51 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.8 35 km SE of Unalaska, 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: 3.6 (mb), minor
Local time: Sat, Feb 29, 2020, 5:51 AM AKST
UTC: 2020-02-29 14:51:31 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 53.384° N, 165.906° 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 4.4 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.11
Depth from: Operator assigned
Station coverage gap: 167°
Stations used: 120

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast68 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 47 in the 60 days after this one and 37 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 us600086yk (also filed as ak0202rgvw38). Read Wed, Sep 30, 2026, 8:14 AM UTC.