Alaska earthquakes

M1.6 earthquake 19 km SSW of Adak, Alaska

A magnitude 1.6 earthquake struck 19 km SSW of Adak, Alaska on Fri, Sep 24, 2021, 8:25 AM HADT (17:25 UTC), 75 km (47 mi) below the surface.

A larger quake followed: M2.1 110 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.6 (ml), micro
Local time
UTC
2021-09-24 17:25:58 UTC
Depth
75.0 km (46.6 mi), intermediate-depth
Epicenter
51.718° N, 176.760° 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
35

Nearby

Within 100 km, magnitude 1.5 and up: 127 in the 60 days after this one and 72 in the 30 days before it.

After

The first 60 of 127.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021c9urik5. Read Thu, Sep 24, 2026, 5:56 AM UTC.