Alaska earthquakes

M4.6 earthquake 153 km S of False Pass, Alaska

A magnitude 4.6 earthquake struck 153 km S of False Pass, Alaska on Thu, May 4, 2023, 11:34 PM AKDT (07:34 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M4.7 151 km S of False Pass, 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.

Open the live map with earthquakes

The earthquake

Magnitude: 4.6 (mwr), light
Local time: Thu, May 4, 2023, 11:34 PM AKDT
UTC: 2023-05-05 07:34:14 UTC
Depth: 16.7 km (10.4 mi), shallow
Epicenter: 53.472° N, 163.378° W
Region: Alaska
Felt reports: 1
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: -3.9 cm/s
Map: Automatic

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

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Fault motion and ground failure

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

Faulting: Oblique reverse
Moment magnitude: 4.6 Mwr
Nodal plane 1: Strike 297°, dip 11°, rake 137°
Nodal plane 2: Strike 70°, dip 82°, rake 82°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.7 km horizontally, 4.6 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 165°
Stations used: 150

Nearest places

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

Akutan, AlaskaPopulation 1,040. Forecast174 kmESE

Nearby

Within 100 km, magnitude 1.6 and up: 170 in the 60 days after this one and 64 in the 30 days before it.

After

The first 60 of 170.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000k9my (also filed as ak0235qujqpv). Read Mon, Sep 28, 2026, 7:06 AM UTC.