Alaska earthquakes

M3.4 earthquake 15 km ENE of Unalaska, Alaska

A magnitude 3.4 earthquake struck 15 km ENE of Unalaska, Alaska on Sun, Sep 1, 2024, 9:31 AM AKDT (17:31 UTC), 12 km (7 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: 3.4 (ML, local (Richter)), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Sep 1, 2024, 9:31 AM AKDT
UTC: 2024-09-01 17:31:45 UTC
Depth: 11.7 km (7.3 mi), shallow
Epicenter: 53.909° N, 166.302° W
Region: Alaska
Felt reports: 2
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.4	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.091 · 16 stations
3.3	ML, local (Richter)	Alaska Earthquake Center	Preliminary
3.38	ML, local (Richter)	AV	Final · ±0.272317755302412 · 32 stations

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 2.5 km horizontally, 4.3 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 177°
Stations used: 32

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast16 kmENE

Nearby

Within 100 km, magnitude 1.5 and up: 190 in the 60 days after this one and 61 in the 30 days before it.

After

The first 60 of 190.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000nqrg (also filed as av93247723, ak024b9gz4xu). Read Fri, Oct 2, 2026, 8:19 AM UTC.