Alaska earthquakes

M3.8 earthquake 89 km S of Adak, Alaska

A magnitude 3.8 earthquake struck 89 km S of Adak, Alaska on Mon, Jul 26, 2021, 9:08 AM HADT (18:08 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M4.5 161 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.8 (ml), minor
Local time
UTC
2021-07-26 18:08:36 UTC
Depth
15.7 km (9.8 mi), shallow
Epicenter
51.076° N, 176.489° 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.

How well it is located

Reviewed by a seismologist.

Stations used
55

Nearby

Within 100 km, magnitude 1.5 and up: 147 in the 60 days after this one and 85 in the 30 days before it.

After

The first 60 of 147.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219in0fmk. Read Thu, Sep 24, 2026, 2:11 PM UTC.