Alaska earthquakes

M3.6 earthquake 85 km SSW of Unalaska, Alaska

A magnitude 3.6 earthquake struck 85 km SSW of Unalaska, Alaska on Sat, Apr 13, 2024, 7:58 PM AKDT (03:58 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M4.4 117 km E 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: 3.6 (mb), minor
Local time: Sat, Apr 13, 2024, 7:58 PM AKDT
UTC: 2024-04-14 03:58:03 UTC
Depth: 35.9 km (22.3 mi), shallow
Epicenter: 53.119° N, 166.797° W
Region: Alaska
Strongest shaking: II, weak shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: II, weak shaking
Peak ground acceleration: 0.1% of gravity
Peak ground velocity: -3.1 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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 4.8 km horizontally, 9.5 km in depth
Magnitude uncertainty: ±0.18
Depth from: From location
Station coverage gap: 169°
Stations used: 44

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast86 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 123 in the 60 days after this one and 73 in the 30 days before it.

After

The first 60 of 123.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000mc06 (also filed as ak0244tpk6q6). Read Tue, Sep 29, 2026, 4:18 AM UTC.