Alaska earthquakes

M3.7 earthquake 155 km S of Unalaska, Alaska

A magnitude 3.7 earthquake struck 155 km S of Unalaska, Alaska on Tue, Sep 17, 2024, 9:42 PM AKDT (05:42 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.4 85 km SSW 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: 3.7 (mb), minor
Local time: Tue, Sep 17, 2024, 9:42 PM AKDT
UTC: 2024-09-18 05:42:47 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 52.492° N, 166.201° 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 2.8 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.14
Depth from: Operator assigned
Station coverage gap: 177°
Stations used: 44

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast155 kmS

Nearby

Within 100 km, magnitude 1.5 and up: 132 in the 60 days after this one and 28 in the 30 days before it.

After

The first 60 of 132.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ntav (also filed as ak024c1e179h). Read Tue, Sep 29, 2026, 4:19 AM UTC.