Alaska earthquakes

M3.6 earthquake 67 km SE of Atka, Alaska

A magnitude 3.6 earthquake struck 67 km SE of Atka, Alaska on Fri, Jul 31, 2026, 12:27 PM HADT (21:27 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M4.9 86 km SSE 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: 3.6 (ml), minor
Local time: Fri, Jul 31, 2026, 12:27 PM HADT
UTC: 2026-07-31 21:27:50 UTC
Depth: 23.9 km (14.8 mi), shallow
Epicenter: 51.807° N, 173.450° W
Region: Alaska
Strongest shaking: III, 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: III, weak shaking
Peak ground acceleration: 0.5% of gravity
Peak ground velocity: 0.1 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 6.0 km horizontally, 13.5 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 201°, poorly surrounded by stations
Stations used: 25

Nearby

Within 100 km, magnitude 1.5 and up: 110 since this one and 142 in the 30 days before it.

After

The first 60 of 110.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000thf0 (also filed as aka2026pbjouu). Read Sun, Sep 27, 2026, 4:57 PM UTC.