Alaska earthquakes

M3.1 earthquake 113 km SW of Adak, Alaska

A magnitude 3.1 earthquake struck 113 km SW of Adak, Alaska on Tue, Sep 15, 2026, 2:50 AM HADT (11:50 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.4 160 km WSW of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Tue, Sep 15, 2026, 2:50 AM HADT
UTC: 2026-09-15 11:50:25 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.247° N, 177.921° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

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 3.5 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 209°, poorly surrounded by stations
Stations used: 36

Nearby

Within 100 km, magnitude 1.5 and up: 8 since this one and 144 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 us7000thqb (also filed as aka2026shphzx). Read Tue, Sep 22, 2026, 4:01 PM UTC.