Alaska earthquakes

M4.3 earthquake 138 km SE of Akutan, Alaska

A magnitude 4.3 earthquake struck 138 km SE of Akutan, Alaska on Thu, May 23, 2024, 2:38 AM AKDT (10:38 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M4.7 87 km SE of Akutan, Alaska. This one was a foreshock.

Akutan 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: 4.3 (Mwr, regional moment), light
Magnitude from: USGS National Earthquake Information Center
Local time: Thu, May 23, 2024, 2:38 AM AKDT
UTC: 2024-05-23 10:38:23 UTC
Depth: 23.1 km (14.4 mi), shallow
Epicenter: 53.132° N, 164.534° W
Region: Alaska
Strongest shaking: II, weak shaking
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
4.3	Mwr, regional moment	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.098 · 10 stations
4.3	Mwr, regional moment	Alaska Earthquake Center	Preliminary

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: 0.0 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 4.3 Mwr
Nodal plane 1: Strike 275°, dip 13°, rake 115°
Nodal plane 2: Strike 70°, dip 78°, rake 84°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.0 km horizontally, 4.6 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 122°
Stations used: 93

Nearest places

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

Akutan, AlaskaPopulation 1,040. Forecast138 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 127 in the 60 days after this one and 58 in the 30 days before it.

After

The first 60 of 127.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000n0e5 (also filed as ak0246mbkif5). Read Fri, Oct 2, 2026, 11:11 AM UTC.