Alaska earthquakes

M4.4 earthquake 263 km WSW of Adak, Alaska

A magnitude 4.4 earthquake struck 263 km WSW of Adak, Alaska on Sun, Sep 27, 2026, 5:02 AM GMT+12 (17:02 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M4.6 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 4.4 (mb), light
Local time: Sun, Sep 27, 2026, 5:02 AM GMT+12
UTC: 2026-09-26 17:02:01 UTC
Depth: 17.6 km (10.9 mi), shallow
Epicenter: 51.158° N, 179.749° E
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: 1.6% of gravity
Peak ground velocity: 0.5 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. If you felt it, tell the USGS: every report sharpens the shaking map.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 7.9 km horizontally, 5.8 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 178°
Stations used: 76

Nearby

Within 100 km, magnitude 1.5 and up: 8 since this one and 65 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 us6000txu2 (also filed as aka2026tchyll). Read Wed, Sep 30, 2026, 11:31 AM UTC.