Alaska earthquakes

M4.0 earthquake 113 km NE of Atka, Alaska

A magnitude 4.0 earthquake struck 113 km NE of Atka, Alaska on Fri, May 29, 2026, 1:15 AM HADT (10:15 UTC), 239 km (148 mi) below the surface.

A larger quake followed: M4.3 104 km NNE of Atka, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 4.0 (mb), light
Local time: Fri, May 29, 2026, 1:15 AM HADT
UTC: 2026-05-29 10:15:35 UTC
Depth: 238.8 km (148.4 mi), intermediate-depth
Epicenter: 52.955° N, 173.085° W
Region: Alaska
Strongest shaking: I, not felt 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: I, not felt shaking
Peak ground acceleration: 0.0% 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.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 10.9 km horizontally, 8.6 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 129°
Stations used: 72

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 7 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000sp8x (also filed as aka2026kodufi). Read Wed, Sep 30, 2026, 10:56 PM UTC.