Alaska earthquakes

M3.8 earthquake 258 km WNW of Adak, Alaska

A magnitude 3.8 earthquake struck 258 km WNW of Adak, Alaska on Sun, Feb 22, 2026, 5:02 PM GMT+12 (05:02 UTC), 182 km (113 mi) below the surface.

A larger quake followed: M4.0 230 km W of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.8 (mb, body-wave), minor
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Feb 22, 2026, 5:02 PM GMT+12
UTC: 2026-02-22 05:02:56 UTC
Depth: 181.9 km (113.0 mi), intermediate-depth
Epicenter: 52.406° N, 179.690° E
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 10.3 km horizontally, 10.1 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 57°
Stations used: 27

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 9 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 us7000s2kc (also filed as aka2026drvwgt). Read Fri, Oct 2, 2026, 6:30 AM UTC.